[go: up one dir, main page]

WO2018096858A1 - Double-sided silicone adhesive sheet and production method for double-sided silicone adhesive sheet - Google Patents

Double-sided silicone adhesive sheet and production method for double-sided silicone adhesive sheet Download PDF

Info

Publication number
WO2018096858A1
WO2018096858A1 PCT/JP2017/038233 JP2017038233W WO2018096858A1 WO 2018096858 A1 WO2018096858 A1 WO 2018096858A1 JP 2017038233 W JP2017038233 W JP 2017038233W WO 2018096858 A1 WO2018096858 A1 WO 2018096858A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensitive adhesive
pressure
adhesive sheet
double
silicone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2017/038233
Other languages
French (fr)
Japanese (ja)
Inventor
道生 金井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lintec Corp
Original Assignee
Lintec Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lintec Corp filed Critical Lintec Corp
Priority to JP2018552473A priority Critical patent/JP6517451B2/en
Priority to CN201780049847.0A priority patent/CN109642128A/en
Priority to KR1020197002938A priority patent/KR20190086429A/en
Publication of WO2018096858A1 publication Critical patent/WO2018096858A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
    • C09J183/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2479/00—Presence of polyamine or polyimide
    • C09J2479/08—Presence of polyamine or polyimide polyimide
    • C09J2479/086—Presence of polyamine or polyimide polyimide in the substrate

Definitions

  • the present invention relates to a double-sided silicone pressure-sensitive adhesive sheet and a method for producing a double-sided silicone pressure-sensitive adhesive sheet.
  • a heat-resistant adhesive sheet using a silicone-based adhesive is widely used in the manufacturing process of electronic devices.
  • the adhesive tape for electronic devices is produced by apply
  • an adhesive prepared by adding a two-component addition-curable silicone rubber containing a vinyl group and a hydrosilyl group in a dimethylsiloxane main chain to a silicone-based adhesive is applied to a polyimide base layer and dried.
  • heat-resistant adhesive tapes for semiconductor package manufacturing processes are produced.
  • a silicone-based adhesive layer is formed by applying and heating a toluene solution containing an addition-reactive silicone-based adhesive, a platinum-based catalyst, and dimethylsilicone oil on one side of a polyimide film as a base material. Yes. Furthermore, a polyethylene terephthalate film is bonded to the silicone-based adhesive layer to produce an adhesive tape for surface protection.
  • a silicone-based pressure-sensitive adhesive layer is obtained by applying a solvent-based coating solution obtained by diluting a silicone-based pressure-sensitive adhesive with a solvent to a polyimide film that is a heat-resistant substrate and drying it. Is formed only on one side of the substrate.
  • a double-sided silicone pressure-sensitive adhesive sheet is a method in which a pressure-sensitive adhesive composition is directly applied to a substrate using a roll coater or a die coater, and then a release sheet is bonded to the pressure-sensitive adhesive layer obtained through a drying step (hereinafter, Direct coating method) or a method in which a pressure-sensitive adhesive composition is once coated on a release sheet and a pressure-sensitive adhesive layer obtained through a drying process is transferred to a substrate (hereinafter referred to as a transfer method). .
  • a double-sided silicone pressure-sensitive adhesive sheet produced by the transfer method tends to have poor adhesion between the pressure-sensitive adhesive layer and the substrate. Therefore, it is preferable to obtain a double-sided silicone pressure-sensitive adhesive sheet using a direct coating method. Specifically, a single-sided silicone pressure-sensitive adhesive sheet is obtained by applying a silicone-based pressure-sensitive adhesive coating liquid to one surface (first substrate surface) of a substrate to form a first pressure-sensitive adhesive layer. .
  • a single-sided silicone pressure-sensitive adhesive sheet wound up in a roll shape is fed out, and a second pressure-sensitive adhesive layer is applied by applying a silicone-based pressure-sensitive adhesive coating solution to the other side of the base material (second base material surface).
  • a double-sided silicone pressure-sensitive adhesive sheet is produced by forming
  • the double-sided silicone pressure-sensitive adhesive sheet was produced by the above method, it was confirmed that the charge amount of the single-sided silicone pressure-sensitive adhesive sheet was increased when the single-sided silicone pressure-sensitive adhesive sheet was fed out.
  • the silicone-based adhesive is generated by the static electricity of the single-sided silicone adhesive sheet generated when the single-sided silicone adhesive sheet is unwound.
  • the organic solvent in the adhesive coating solution may ignite and cause a fire.
  • the object of the present invention is to ignite the organic solvent of the silicone adhesive coating liquid by static electricity of the single-sided silicone pressure-sensitive adhesive sheet generated when the single-sided silicone pressure-sensitive adhesive sheet is fed out in the process of producing the double-sided silicone pressure-sensitive adhesive sheet by the direct coating method. It is an object of the present invention to provide a method for producing a double-sided silicone pressure-sensitive adhesive sheet that can be safely produced without fear of the occurrence. Another object of the present invention is to provide a highly safe double-sided silicone pressure-sensitive adhesive sheet in which an increase in charge amount is suppressed.
  • the first pressure-sensitive adhesive layer is formed by applying a first coating liquid containing a silicone-based pressure-sensitive adhesive to the first base material surface of the base material, The first release film is laminated on the first pressure-sensitive adhesive layer to obtain a single-sided silicone pressure-sensitive adhesive sheet having antistatic performance, the step of winding the single-sided silicone pressure-sensitive adhesive sheet into a roll shape, and the film is wound into a roll shape. And applying a second coating liquid containing a silicone-based pressure-sensitive adhesive to the step of feeding out the one-sided silicone pressure-sensitive adhesive sheet and the second base material surface opposite to the first base material surface of the base material. And forming the second pressure-sensitive adhesive layer, and laminating the second release film on the second pressure-sensitive adhesive layer and winding it into a roll. Provided.
  • the antistatic agent contained in the first coating liquid is preferably an ion conductive silicone compound.
  • the antistatic agent contained in the first coating liquid is an ionic group-containing silicone oligomer or a silicone oil in which an alkali metal salt is dissolved. Preferably there is.
  • the second coating liquid preferably contains an antistatic agent.
  • the substrate has a long shape (band shape).
  • the base material is preferably a polyimide film.
  • a plurality of A4-sized test pieces are produced from the roll-like single-sided silicone pressure-sensitive adhesive sheet, and a plurality of the test pieces are stacked to produce a laminate. Then, one piece of the test piece is taken out from the outermost layer of the laminate, and the charge amount of one piece of the test piece after 10 seconds from taking out the one piece of test piece from the laminate is 10 kV or less. Preferably there is.
  • the substrate having the first substrate surface and the second substrate surface opposite to the first substrate surface, and the first substrate surface A first pressure-sensitive adhesive layer provided on the first pressure-sensitive adhesive layer, a first release film laminated on the first pressure-sensitive adhesive layer, a second pressure-sensitive adhesive layer provided on the second substrate surface, A second release film laminated on the second pressure-sensitive adhesive layer, wherein the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer contain a silicone pressure-sensitive adhesive, and the first pressure-sensitive adhesive layer
  • the agent layer is provided with a double-sided silicone pressure-sensitive adhesive sheet having antistatic performance.
  • the base material is preferably long (band-shaped).
  • the base material is preferably a polyimide film.
  • the first pressure-sensitive adhesive layer preferably contains an antistatic agent.
  • the antistatic agent contained in the first pressure-sensitive adhesive layer is preferably an ion conductive silicone compound.
  • the antistatic agent contained in the first pressure-sensitive adhesive layer is an ionic group-containing silicone oligomer or a silicone oil in which an alkali metal salt is dissolved. preferable.
  • the second pressure-sensitive adhesive layer preferably contains an antistatic agent.
  • the organic solvent of the silicone-based pressure-sensitive adhesive coating liquid is ignited by static electricity of the single-sided silicone pressure-sensitive adhesive sheet generated when the single-sided silicone pressure-sensitive adhesive sheet is fed out. Therefore, it is possible to provide a method for producing a double-sided silicone pressure-sensitive adhesive sheet that can be safely produced.
  • a highly safe double-sided silicone pressure-sensitive adhesive sheet in which an increase in charge amount is suppressed can be provided.
  • the double-sided silicone pressure-sensitive adhesive sheet 1 includes a base material 11 having a first base material surface 11a and a second base material surface 11b opposite to the first base material surface 11a, and a first base material surface 11a.
  • the first pressure-sensitive adhesive layer 21 provided, the first release film 31 laminated on the first pressure-sensitive adhesive layer 21, and the second pressure-sensitive adhesive layer 22 provided on the second substrate surface 11b And a second release film 32 laminated on the second pressure-sensitive adhesive layer 22.
  • the first pressure-sensitive adhesive layer 21 and the second pressure-sensitive adhesive layer 22 contain a silicone-based pressure-sensitive adhesive.
  • the first pressure-sensitive adhesive layer 21 preferably contains an antistatic agent. Furthermore, the second pressure-sensitive adhesive layer 22 can also contain an antistatic agent.
  • the shape of the double-sided silicone pressure-sensitive adhesive sheet 1 can take any shape such as a sheet shape, a tape shape, and a label shape.
  • a sheet material such as a synthetic resin film
  • synthetic resin films include polyimide film, polyethylene film, polypropylene film, polybutene film, polybutadiene film, polymethylpentene film, polyvinyl chloride film, vinyl chloride copolymer film, polyethylene terephthalate film, polyethylene naphthalate film, poly Butylene terephthalate film, polyurethane film, ethylene vinyl acetate copolymer film, ionomer resin film, ethylene / (meth) acrylic acid copolymer film, ethylene / (meth) acrylic acid ester copolymer film, polystyrene film, and polycarbonate film Etc.
  • the base material 11 the crosslinked film of these synthetic resin films, a laminated film, etc. are mentioned.
  • the base material 11 may have antistatic properties.
  • the substrate 11 is preferably a polyimide film.
  • the substrate 11 is preferably long (band-shaped). By using the long base material 11, the long double-sided silicone pressure-sensitive adhesive sheet 1 can be manufactured, and production by a so-called roll-to-roll method is possible, and the productivity of the double-sided silicone pressure-sensitive adhesive sheet 1 is improved. To do.
  • the thickness of the substrate 11 is preferably 10 ⁇ m or more and 500 ⁇ m or less, more preferably 15 ⁇ m or more and 300 ⁇ m or less, and further preferably 20 ⁇ m or more and 250 ⁇ m or less.
  • the pressure-sensitive adhesive composition constituting the first pressure-sensitive adhesive layer 21 and the second pressure-sensitive adhesive layer 22 contains a silicone pressure-sensitive adhesive.
  • the silicone pressure-sensitive adhesive contained in the pressure-sensitive adhesive composition of the first pressure-sensitive adhesive layer 21 and the silicone pressure-sensitive adhesive contained in the pressure-sensitive adhesive composition of the second pressure-sensitive adhesive layer 22 are the same as each other. May be different.
  • the pressure-sensitive adhesive composition constituting the first pressure-sensitive adhesive layer 21 preferably contains a silicone pressure-sensitive adhesive and an antistatic agent. Details of the antistatic agent will be described later.
  • the pressure-sensitive adhesive composition constituting the second pressure-sensitive adhesive layer 22 contains a silicone-based pressure-sensitive adhesive, may further contain an antistatic agent, and may not contain an antistatic agent.
  • the thicknesses of the first pressure-sensitive adhesive layer 21 and the second pressure-sensitive adhesive layer 22 are each independently preferably 1 ⁇ m or more and 100 ⁇ m or less, more preferably 2 ⁇ m or more and 80 ⁇ m or less, and 5 ⁇ m or more and 50 ⁇ m or less. More preferably.
  • the thickness of the 1st adhesive layer 21 and the 2nd adhesive layer 22 is less than 1 micrometer, there exists a possibility that the adhesive force of the adhesive tape obtained may not be enough.
  • the thickness of the 1st adhesive layer 21 and the 2nd adhesive layer 22 exceeds 100 micrometers, there is no improvement of adhesive performance and it is uneconomical.
  • the thickness of the first pressure-sensitive adhesive layer 21 and the second pressure-sensitive adhesive layer 22 exceeds 100 ⁇ m, it may cause the pressure-sensitive adhesive to stick out at the time of bonding of the pressure-sensitive adhesive sheet, and attach the pressure-sensitive adhesive sheet. There is a risk of causing cohesive failure of the pressure-sensitive adhesive layer when peeling from the body.
  • silicone pressure-sensitive adhesive examples include pressure-sensitive adhesives containing organopolysiloxane, and pressure-sensitive adhesives containing dimethylpolysiloxane are preferred. More specifically, the silicone-based pressure-sensitive adhesive is an organopolysiloxane having an unsaturated group such as a vinyl group, preferably a dimethylpolysiloxane having an unsaturated group such as a vinyl group, or a crosslink containing a hydrosilyl group (SiH group).
  • An addition-reactive silicone pressure-sensitive adhesive obtained by curing with an agent and a platinum-based catalyst, or a peroxide-curable silicone pressure-sensitive adhesive obtained by curing with an organic peroxide such as BPO can be used.
  • BPO is an abbreviation for Benzoylperoxide.
  • an addition reaction type silicone pressure-sensitive adhesive is preferred. In this case, it is possible to adjust the crosslinking density according to the density of the unsaturated group in consideration of the obtained adhesive strength. For the formation of the silicone pressure-sensitive adhesive layer, heating or the like is required for addition polymerization.
  • the antistatic agent a compound that can be mixed in the silicone pressure-sensitive adhesive composition and uniformly dispersed in the silicone-based pressure-sensitive adhesive composition is preferable.
  • examples of the antistatic agent include an ion conductive antistatic agent and conductive fine particles.
  • Other antistatic agents include ionic conductive silicone compounds.
  • the antistatic agent is preferably an ion conductive antistatic agent or an ion conductive silicone compound, and more preferably an ion conductive silicone compound.
  • the ion conductive silicone compound is not particularly limited.
  • the ion conductive silicone compound examples include an ionic group-containing silicone oligomer, a silicone oil in which an alkali metal salt is dissolved, an ionic group-containing silicone polymer, and the like.
  • ionic group-containing silicone oligomers or silicone oils in which alkali metal salts are dissolved are preferred because they are excellent in dispersibility with the silicone-based pressure-sensitive adhesive composition and are excellent in heat resistance and antistatic properties.
  • the ionic group-containing silicone oligomer is a silicone oligomer obtained by modifying a ionic liquid with silicone. Examples of commercially available products include X-40-2750, X-40-2450, and X-40- manufactured by Shin-Etsu Chemical Co., Ltd. 9310 etc. are mentioned.
  • a lithium salt is preferable.
  • the antistatic agent contained in the pressure-sensitive adhesive composition of the first pressure-sensitive adhesive layer 21 (first antistatic agent) And the antistatic agent (sometimes referred to as a second antistatic agent) contained in the adhesive composition of the second adhesive layer 22 are the same as each other. May be different.
  • Content of antistatic agent is 0.1 mass with respect to the adhesive composition (when an adhesive composition is 100 mass%) which comprises the 1st adhesive layer 21 and the 2nd adhesive layer 22. % To 50% by mass, more preferably 1.0% to 40% by mass.
  • the first antistatic agent contained in the adhesive composition of the first adhesive layer 21 and the second antistatic agent contained in the adhesive composition of the second adhesive layer 22 The contents may be the same as or different from each other.
  • the adhesive composition which comprises the 1st adhesive layer 21 and the 2nd adhesive layer 22 may contain the other component in the range which does not impair the effect of this invention.
  • other components that can be included in the pressure-sensitive adhesive composition include flame retardants, tackifiers, ultraviolet absorbers, antioxidants, antiseptics, antifungal agents, plasticizers, antifoaming agents, and wettability modifiers. Etc.
  • the first release film 31 and the second release film 32 are not particularly limited.
  • the release film preferably includes a release substrate and a release agent layer formed by applying a release agent on at least one surface of the release substrate.
  • the release substrate of the first release film 31 and the release substrate of the second release film 32 are the same as each other. It may be different.
  • the release agent layer of the first release film 31 and the release agent layer of the second release film 32 are the same release from each other. It may be formed with an agent or may be formed with a different release agent.
  • Examples of the release substrate include a paper substrate, a laminated paper obtained by laminating a thermoplastic resin such as polyethylene on the paper substrate, and a plastic film.
  • Examples of the paper substrate include glassine paper, coated paper, and cast coated paper.
  • Examples of the plastic film include polyester films such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and polyolefin films such as polypropylene and polyethylene.
  • Examples of the release agent include olefin resins, rubber elastomers (eg, butadiene resins, isoprene resins, etc.), long chain alkyl resins, alkyd resins, fluorine resins, and silicone resins.
  • the release agent is any selected from the group consisting of olefin resins, rubber elastomers (for example, butadiene resins, isoprene resins, etc.), long chain alkyl resins, alkyd resins, and fluorine resins.
  • olefin resins for example, butadiene resins, isoprene resins, etc.
  • rubber elastomers for example, butadiene resins, isoprene resins, etc.
  • long chain alkyl resins for example, butadiene resins, isoprene resins, etc.
  • alkyd resins alkyd resins
  • fluorine resins fluorine resins
  • a release film using a general silicone resin has a problem that it is easily peeled off from an adhesive layer containing a silicone adhesive.
  • the release agent layer of the first release film 31 and the second release film 32 is a fluororesin, the first adhesive layer 21 and the second adhesive layer 22 containing a silicone-based adhesive, The double-sided silicone pressure-sensitive adhesive sheet 1 having good releasability can be obtained.
  • the release agent layer may further contain an antistatic agent or may not contain an antistatic agent.
  • the thickness of the first release film 31 and the second release film 32 is not particularly limited.
  • the thickness of the first release film 31 and the second release film 32 is preferably 20 ⁇ m or more and 200 ⁇ m or less, and more preferably 25 ⁇ m or more and 150 ⁇ m or less.
  • the thickness of the release agent layer is not particularly limited.
  • the thickness of the release agent layer is preferably 0.01 ⁇ m or more and 2.0 ⁇ m or less, and 0.03 ⁇ m or more and 1. More preferably, it is 0 ⁇ m or less.
  • the thickness of the plastic film is preferably 3 ⁇ m or more and 50 ⁇ m or less, and more preferably 5 ⁇ m or more and 40 ⁇ m or less.
  • the double-sided silicone pressure-sensitive adhesive sheet 1 is composed of the base material 11, the first pressure-sensitive adhesive layer 21, the first release film 31, the second pressure-sensitive adhesive layer 22, and the second release film 32. A layer may be further provided.
  • Method for producing double-sided silicone adhesive sheet A method for producing the double-sided silicone pressure-sensitive adhesive sheet 1 according to this embodiment will be described.
  • a first coating liquid containing a silicone-based pressure-sensitive adhesive and an antistatic agent is applied to the first base material surface 11 a of the base material 11.
  • the first coating liquid and the second coating liquid can be prepared by diluting the silicone-based pressure-sensitive adhesive composition with an organic solvent.
  • the organic solvent include toluene, ethyl acetate, and methyl ethyl ketone.
  • the method for applying the coating liquid is not particularly limited. Examples of the application method include spray coating, bar coating, knife coating, roll knife coating, roll coating, blade coating, die coating, and gravure coating.
  • the coating liquid is applied to the substrate 11, and then the coating film is heated and dried. .
  • a crosslinking agent is mix
  • FIG. 2 shows a schematic diagram for explaining the pressure-sensitive adhesive sheet manufacturing apparatus 100A for the double-sided silicone pressure-sensitive adhesive sheet 1 according to the present embodiment.
  • the pressure-sensitive adhesive sheet manufacturing apparatus 100 ⁇ / b> A includes a first roll feeding unit 100, a coating unit 200, a drying unit 300, a second roll feeding unit 400, a bonding unit 500, and a roll winding unit 600.
  • the 1st roll supply part 100 pays out the base material 11 and the single-sided silicone adhesive sheet 10 (refer FIG. 3C) wound up by roll shape.
  • the coating unit 200 applies a coating liquid to the base material 11 and the single-sided silicone pressure-sensitive adhesive sheet 10 that has been fed by the first roll feeding unit 100 to form a pressure-sensitive adhesive layer.
  • the drying unit 300 dries the pressure-sensitive adhesive layer and removes the organic solvent and the like contained in the coating liquid.
  • the 2nd roll supply part 400 pays out the peeling film wound up by roll shape.
  • the bonding unit 500 laminates the release film fed from the second roll feeding unit 400 on the pressure-sensitive adhesive layer dried by the drying unit 300.
  • the roll winding unit 600 winds up the sheet (the single-sided silicone pressure-sensitive adhesive sheet 10 and the double-sided silicone pressure-sensitive adhesive sheet 1) on which the release film is laminated in a roll shape.
  • FIG. 3A to 3E are schematic views for explaining a method for producing the double-sided silicone pressure-sensitive adhesive sheet 1 according to the present embodiment.
  • a method of manufacturing using the pressure-sensitive adhesive sheet manufacturing apparatus 100A will be described as an example.
  • the double-sided silicone pressure-sensitive adhesive sheet 1 according to this embodiment is manufactured through the following steps.
  • FIG. 3A shows a schematic cross-sectional view of a substrate 11 having a first substrate surface 11a and a second substrate surface 11b.
  • the long base material 11 wound up in a roll shape is installed in the first roll feeding unit 100.
  • the base material 11 is fed by the first roll feeding unit 100 so that the first base material surface 11 a becomes the upper surface, and is conveyed to the coating unit 200.
  • a first pressure-sensitive adhesive layer 21 is formed by applying a first coating liquid containing a silicone-based pressure-sensitive adhesive and an antistatic agent to the first base material surface 11a of the base material 11 at the application unit 200 ( (See FIG. 3B). Then, the 1st laminated body which has the base material 11 and the 1st adhesive layer 21 is conveyed from the application part 200 to the drying part 300, and the 1st adhesive layer 21 is dried. Furthermore, a 1st laminated body is conveyed from the drying part 300 to the bonding part 500, and the 1st peeling film 31 is laminated
  • the first release film 31 is a long film wound up in a roll shape, and is fed from the second roll feeding unit 400 and conveyed to the bonding unit 500. One laminate is attached.
  • the 2nd laminated body single-sided silicone adhesive sheet 10
  • the manufacturing method according to the present embodiment includes a step of winding the single-sided silicone pressure-sensitive adhesive sheet 10 into a roll before forming the second pressure-sensitive adhesive layer 22.
  • the single-sided silicone pressure-sensitive adhesive sheet 10 wound up in a roll shape is further installed in the first roll feeding portion 100 in FIG.
  • a step of feeding out The one-sided silicone pressure-sensitive adhesive sheet 10 that has been fed out is conveyed to the application unit 200.
  • the 2nd coating liquid containing a silicone type adhesive agent is apply
  • the third laminate (the laminate having the substrate 11, the first pressure-sensitive adhesive layer 21, the first release film 31 and the second pressure-sensitive adhesive layer 22) is conveyed from the application unit 200 to the drying unit 300. Then, the second pressure-sensitive adhesive layer 22 is dried.
  • a 3rd laminated body is conveyed from the drying part 300 to the bonding part 500, and the 2nd peeling film 32 is laminated
  • the second release film 32 is a long film wound up in a roll shape, and is fed out from the second roll feeding unit 400 and conveyed to the bonding unit 500. Bonded with the three laminates.
  • the first pressure-sensitive adhesive layer 21 is provided between the base material 11 and the first release film 31, and the second pressure-sensitive adhesive layer 22 is provided between the base material 11 and the second release film 32.
  • a double-sided silicone pressure-sensitive adhesive sheet 1 provided with (see FIG. 3E) is obtained.
  • the double-sided silicone pressure-sensitive adhesive sheet 1 thus manufactured is wound up in a roll shape by, for example, the roll winding unit 600 in FIG.
  • the double-sided silicone pressure-sensitive adhesive sheet 1 according to this embodiment can be manufactured using a pressure-sensitive adhesive sheet manufacturing apparatus 100A.
  • This invention is not limited to the manufacturing method of the double-sided silicone adhesive sheet 1 manufactured using the adhesive sheet manufacturing apparatus 100A and the double-sided silicone adhesive sheet 1 implemented using the adhesive sheet manufacturing apparatus 100A.
  • the first coating liquid and the second coating liquid are directly applied to the base material 11, and the first pressure-sensitive adhesive layer. 21 and the second pressure-sensitive adhesive layer 22 are preferably formed.
  • the charge amount of the single-sided silicone pressure-sensitive adhesive sheet 10 is preferably 10 kV or less.
  • the charge amount of the single-sided silicone pressure-sensitive adhesive sheet 10 is a value measured by a method of an example described later. If the charge amount of the single-sided silicone pressure-sensitive adhesive sheet 10 is 10 kV or less, there is no risk of ignition and the second pressure-sensitive adhesive composition can be applied by a direct coating method.
  • the double-sided silicone pressure-sensitive adhesive sheet according to this embodiment can be used as a highly safe double-sided silicone pressure-sensitive adhesive sheet in which an increase in charge amount is suppressed. Moreover, the double-sided silicone adhesive sheet which concerns on this embodiment can be utilized as a double-sided silicone adhesive sheet containing a heat-resistant silicone adhesive.
  • the double-sided silicone pressure-sensitive adhesive sheet according to the present embodiment can be suitably used, for example, in an electronic device manufacturing process that requires high temperature conditions. Furthermore, in the double-sided silicone pressure-sensitive adhesive sheet according to this embodiment, by using a heat-resistant polyimide film as a base material, it can be more suitably used in the manufacturing process of the electronic device.
  • the present invention is not limited to the above embodiment.
  • the present invention includes an aspect obtained by modifying the above-described embodiment as long as the object of the present invention can be achieved.
  • the base material 11, the first pressure-sensitive adhesive layer 21 provided on the first base material surface 11a, and the first pressure-sensitive adhesive layer 21 and a second pressure-sensitive adhesive layer 22 provided on the second base material surface 11b, and the second pressure-sensitive adhesive layer 22 includes a second release film 32.
  • a double-sided silicone pressure-sensitive adhesive sheet 1A that is not laminated is exemplified. Both surfaces of the double-sided release film 33 have peelability.
  • the double-sided release film 33 preferably includes a release base and a release agent layer formed on both sides of the release base.
  • the release substrate and release agent layer of the double-sided release film 33 may be the same release substrate and release agent layer as the first release film 31 and the second release film 32.
  • the double-sided silicone pressure-sensitive adhesive sheet 1A is a sheet piece
  • a plurality of double-sided silicone pressure-sensitive adhesive sheets 1A may be laminated to form a laminate.
  • the second pressure-sensitive adhesive layer 22 of another double-sided silicone pressure-sensitive adhesive sheet 1A can be laminated on the outer surface side of the double-sided release film 33 of the double-sided silicone pressure-sensitive adhesive sheet 1A.
  • stacking state 1 A of sheet piece-like double-sided silicone adhesive sheets can be peeled from the laminated body one by one, protecting the 2nd adhesive layer 22, and can be used.
  • double-sided silicone adhesive sheet 1A is elongate, it can be wound around a core material and stored as a roll.
  • a first pressure-sensitive adhesive layer is formed by applying a first coating liquid containing a silicone-based pressure-sensitive adhesive and an antistatic agent.
  • the single-sided silicone adhesive sheet whose base material is a base material (antistatic base material) which has antistatic property is mentioned.
  • the first pressure-sensitive adhesive layer does not contain an antistatic agent, or the single-sided silicone pressure-sensitive adhesive sheet further contains an antistatic agent.
  • the first release film may have antistatic properties or may not have antistatic properties.
  • a method for forming a pressure-sensitive adhesive layer not containing an antistatic agent for example, a method of preparing a coating solution that does not contain an antistatic agent, applying the coating solution to a substrate, and drying the coating solution Is mentioned.
  • the single-sided silicone adhesive sheet which has an antistatic layer in at least any one surface of the 1st base material surface of a base material and the 2nd base material surface on the opposite side is mentioned.
  • the antistatic layer is formed on the first substrate surface
  • the first pressure-sensitive adhesive layer is formed on the antistatic layer.
  • the antistatic layer is formed on the second base material surface
  • the first pressure-sensitive adhesive layer is formed on the first base material surface
  • the second pressure-sensitive adhesive layer is formed on the antistatic layer. It is formed.
  • the first pressure-sensitive adhesive layer is a single-sided silicone pressure-sensitive adhesive sheet that does not contain an antistatic agent, or the first pressure-sensitive adhesive layer is a single-sided silicone pressure-sensitive adhesive sheet that further contains an antistatic agent.
  • the substrate may have antistatic properties or may not have antistatic properties.
  • the first release film may have antistatic properties or may not have antistatic properties.
  • a single-sided silicone pressure-sensitive adhesive sheet in which a first release film having antistatic properties is laminated on the first pressure-sensitive adhesive layer.
  • the first release film having antistatic properties is a release film comprising a release substrate and a release agent layer as in the release film described in the embodiment, and at least any of the release substrate and the release agent layer. Is preferably a release film having antistatic properties. Examples of the case where the release agent layer has antistatic properties include a case where an antistatic agent is added to the release agent layer.
  • the substrate may have antistatic properties or may not have antistatic properties.
  • Adhesive composition A Addition reaction type silicone adhesive (manufactured by Toray Dow Corning Co., Ltd., product name: SD4570PSA, solid content 60% by mass, silicone resin content 60% by mass, addition reaction type silicone containing crosslinking agent) 100 mass Part, platinum catalyst (manufactured by Dow Corning Toray Co., Ltd., product name: SRX-212, solid content: 100% by mass), 0.9 parts by mass, and a silicone oil in which a lithium (Li) salt as an antistatic agent is dissolved (Adhesive composition A was prepared by adding 20 parts by weight (manufactured by Maruhishi Oil Chemical Co., Ltd., PC-3462, solid content 62% by mass), and this adhesive composition A was diluted with toluene to obtain a solid content. A coating liquid AL having a concentration of 25% by mass was prepared.
  • Adhesive composition B The antistatic agent contained in the pressure-sensitive adhesive composition A was changed to an ionic group-containing silicone oligomer (manufactured by Shin-Etsu Chemical Co., Ltd., X-40-2750, solid content: 100% by mass), and the addition amount was changed to 6 parts by mass.
  • a pressure-sensitive adhesive composition B was prepared in the same manner as the pressure-sensitive adhesive composition A, except that it was prepared as described above.
  • the pressure-sensitive adhesive composition B was diluted with toluene to prepare a coating liquid BL having a solid content concentration of 25% by mass.
  • Adhesive composition C A pressure-sensitive adhesive composition C was prepared in the same manner as the pressure-sensitive adhesive composition A except that the anti-static agent contained in the pressure-sensitive adhesive composition A was not included.
  • the pressure-sensitive adhesive composition C was diluted with toluene to prepare a coating liquid CL having a solid concentration of 25% by mass.
  • Example 1 With respect to the first base material surface of the polyimide film (manufactured by Toray DuPont Co., Ltd., Kapton 100H, thickness 25 ⁇ m) as the base material, the prepared coating liquid AL is so dried that the thickness after drying becomes 20 ⁇ m. Application using a comma coater (registered trademark), passing through a drying oven, drying at a wind speed of 5 m / sec, a drying temperature of 120 ° C.
  • a comma coater registered trademark
  • the release layer surface side of the release film [manufactured by Lintec Co., Ltd .; SP-PET38YSD] was laminated to prepare a single-sided silicone adhesive sheet having a structure of base material / first adhesive layer / first release film.
  • This single-sided silicone pressure-sensitive adhesive sheet was wound up into a roll. Moreover, the antistatic performance mentioned later was evaluated using this single-sided silicone adhesive sheet.
  • the single-sided silicone pressure-sensitive adhesive sheet is fed out from the wound body of the obtained single-sided silicone pressure-sensitive adhesive sheet, and the prepared coating liquid CL is dried on the second base material surface of the base material using a comma coater (registered trademark). It was applied so that the subsequent thickness was 20 ⁇ m, passed through a drying furnace, dried at a wind speed of 5 m / sec, a drying temperature of 120 ° C. and a drying time of 60 seconds, and further from a 38 ⁇ m polyethylene terephthalate film provided with a fluorine-based release layer.
  • a comma coater registered trademark
  • the release layer surface side of the release film [manufactured by Lintec Corporation; SP-PET38YSD] is laminated, wound up into a roll, and the second release film / second adhesive layer / base material / first adhesive layer / A double-sided silicone pressure-sensitive adhesive sheet having the configuration of the first release film was prepared.
  • Example 2 The single-sided silicone pressure-sensitive adhesive sheet and double-sided silicone pressure-sensitive adhesive sheet of Example 2 were produced in the same manner as in Example 1 except that the coating liquid AL in Example 1 was changed to the coating liquid BL. Using this single-sided silicone pressure-sensitive adhesive sheet, the antistatic performance described later was evaluated.
  • Comparative Example 1 a single-sided silicone pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that the coating liquid AL in Example 1 was changed to the coating liquid CL. Since static electricity was generated in the process of drawing out the wound body of the single-sided silicone pressure-sensitive adhesive sheet, it was determined that there was a possibility of ignition, and the subsequent processes were stopped. The evaluation of the antistatic performance described later was performed on a single-sided silicone pressure-sensitive adhesive sheet.
  • the charge amount of the single-sided silicone pressure-sensitive adhesive sheet was measured by the following method.
  • a plurality of A4 size test pieces were produced from the obtained roll-shaped single-sided silicone pressure-sensitive adhesive sheet.
  • a plurality of test pieces were stacked to produce a laminate.
  • the laminate was allowed to stand, and then one test piece was taken out from the outermost layer of the laminate, and the charge amount of one test piece after 60 seconds from the removal of the test piece from the laminate was measured.
  • the charge amount was measured by a digital electrostatic potential measuring device (KSD-0108, manufactured by Kasuga Denki Co., Ltd.).
  • the A4 size means that the size is 210 mm long and 297 mm wide.
  • Table 1 shows the evaluation results of the above-described antistatic performance with respect to the test pieces according to Example 1, Example 2, and Comparative Example 1.
  • the content of the antistatic agent in Table 1 is the content in the total solid content of the pressure-sensitive adhesive composition.
  • the single-sided silicone pressure-sensitive adhesive sheet according to the example containing the antistatic agent in the first pressure-sensitive adhesive layer has a small charge amount, and in the step of producing the double-sided silicone pressure-sensitive adhesive sheet by the direct coating method, There is no risk of the organic solvent in the silicone-based adhesive coating liquid being ignited by static electricity of the silicone adhesive sheet, and a double-sided silicone adhesive sheet can be produced safely.
  • Double-sided silicone adhesive sheet 11 ... Base material, 11a ... 1st base material surface, 11b ... 2nd base material surface, 21 ... 1st adhesive layer, 22 ... 2nd adhesive layer, 31 ... 1st peeling film, 32 ... 2nd peeling film, 33 ... Double-sided peeling film.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

This production method for a double-sided silicone adhesive sheet (1), comprises: a step for applying a first application liquid containing a silicone adhesive agent to a first substrate surface (11a) of a substrate (11) to form a first adhesive agent layer (21); a step for layering a first release film (31) on the first adhesive agent layer (21) to obtain a single-sided silicone adhesive sheet having antistatic properties; a step for winding the single-sided silicone adhesive sheet into a roll; a step for sending out the single-sided silicone adhesive sheet which has been wound into a roll; a step for applying a second application liquid containing a silicone adhesive agent to a second substrate surface (11b) opposite to the first substrate surface (11a) of the substrate (11) to form a second adhesive agent layer (22); and a step for layering a second release film (32) on the second adhesive agent layer (22), and winding the resulting sheet into a roll.

Description

両面シリコーン粘着シート及び両面シリコーン粘着シートの製造方法Double-sided silicone adhesive sheet and method for producing double-sided silicone adhesive sheet

　本発明は、両面シリコーン粘着シート及び両面シリコーン粘着シートの製造方法に関する。 The present invention relates to a double-sided silicone pressure-sensitive adhesive sheet and a method for producing a double-sided silicone pressure-sensitive adhesive sheet.

　シリコーン系粘着剤を用いた耐熱粘着シートは、電子デバイスの製造工程において広く使用されている。
　例えば、特許文献１では、耐熱性基材であるポリイミドフィルムの片面に、付加反応型シリコーン粘着剤を白金触媒とともに塗布することによって、電子デバイス用粘着テープを作製している。
　特許文献２では、シリコーン系粘着剤に、ジメチルシロキサン主鎖中にビニル基とヒドロシリル基を含む２液付加硬化型シリコーンゴムを添加して調製した粘着剤を、ポリイミド基材層に塗布して乾燥し、半導体パッケージ製造工程用耐熱性粘着テープを作製している。
　特許文献３では、基材のポリイミドフィルムの片面に、付加反応型シリコーン系粘着剤、白金系触媒及びジメチルシリコーンオイルを含むトルエン溶液を塗布し、加熱することで、シリコーン系粘着層を形成している。さらに、シリコーン系粘着層にポリエチレンテレフタレートフィルムを貼り合わせ、表面保護用粘着テープを作製している。
　特許文献１～３の粘着テープにおいて、シリコーン系粘着剤を溶剤で希釈した溶剤系の塗工液を耐熱性基材であるポリイミドフィルムに塗布して、乾燥を行うことにより、シリコーン系粘着剤層は、基材の片面のみに形成されている。 A heat-resistant adhesive sheet using a silicone-based adhesive is widely used in the manufacturing process of electronic devices.
For example, in patent document 1, the adhesive tape for electronic devices is produced by apply | coating an addition reaction type silicone adhesive with a platinum catalyst to the single side | surface of the polyimide film which is a heat resistant base material.
In Patent Document 2, an adhesive prepared by adding a two-component addition-curable silicone rubber containing a vinyl group and a hydrosilyl group in a dimethylsiloxane main chain to a silicone-based adhesive is applied to a polyimide base layer and dried. In addition, heat-resistant adhesive tapes for semiconductor package manufacturing processes are produced.
In Patent Document 3, a silicone-based adhesive layer is formed by applying and heating a toluene solution containing an addition-reactive silicone-based adhesive, a platinum-based catalyst, and dimethylsilicone oil on one side of a polyimide film as a base material. Yes. Furthermore, a polyethylene terephthalate film is bonded to the silicone-based adhesive layer to produce an adhesive tape for surface protection.
In the pressure-sensitive adhesive tapes of Patent Documents 1 to 3, a silicone-based pressure-sensitive adhesive layer is obtained by applying a solvent-based coating solution obtained by diluting a silicone-based pressure-sensitive adhesive with a solvent to a polyimide film that is a heat-resistant substrate and drying it. Is formed only on one side of the substrate.

特開２００４－２２４８５７号公報JP 2004-224857 A 特開２０１２－１５１３６０号公報JP 2012-151360 A 特開２０１３－１４７５４０号公報JP 2013-147540 A

　近年では、片面シリコーン粘着シートのみならず、両面シリコーン粘着シートも求められている。
　両面シリコーン粘着シートは、粘着剤組成物をロールコーターやダイコーター等を用い、直接、基材に塗布した後、乾燥工程を経て得られた粘着剤層に、剥離シートを貼り合わせる方法（以下、直塗り法という）や、剥離シート上に、一旦、粘着剤組成物をコーティングし、乾燥工程を経て得られた粘着剤層を、基材に転写する方法（以下、転写法という）により製造できる。直塗り法により製造した両面シリコーン粘着シートに比べ、転写法により製造した両面シリコーン粘着シートは、粘着剤層と基材との密着性が悪くなる傾向がある。そのため、両面シリコーン粘着シートは、直塗り法を用いて得ることが好ましい。具体的には、シリコーン系粘着剤の塗工液を基材の一方の面（第一の基材面）に塗布して第一の粘着剤層を形成することによって、片面シリコーン粘着シートを得る。その後、例えばロール状に巻き取られた片面シリコーン粘着シートを繰り出し、基材の他方の面（第二の基材面）にシリコーン系粘着剤の塗工液を塗布して第二の粘着剤層を形成することによって、両面シリコーン粘着シートを製造する。
　しかしながら、上記の方法で両面シリコーン粘着シートの製造を行うと、片面シリコーン粘着シートの繰り出し時に、片面シリコーン粘着シートの帯電量が増加していることが確認された。シリコーン系粘着剤の塗工液を第二の基材面に塗布し、第二の粘着剤層を形成する工程において、片面シリコーン粘着シートの繰り出し時に発生した片面シリコーン粘着シートの静電気によって、シリコーン系粘着剤の塗工液の有機溶媒が発火し、火災の原因になる虞がある。 In recent years, not only a single-sided silicone pressure-sensitive adhesive sheet but also a double-sided silicone pressure-sensitive adhesive sheet has been demanded.
A double-sided silicone pressure-sensitive adhesive sheet is a method in which a pressure-sensitive adhesive composition is directly applied to a substrate using a roll coater or a die coater, and then a release sheet is bonded to the pressure-sensitive adhesive layer obtained through a drying step (hereinafter, Direct coating method) or a method in which a pressure-sensitive adhesive composition is once coated on a release sheet and a pressure-sensitive adhesive layer obtained through a drying process is transferred to a substrate (hereinafter referred to as a transfer method). . Compared with the double-sided silicone pressure-sensitive adhesive sheet produced by the direct coating method, the double-sided silicone pressure-sensitive adhesive sheet produced by the transfer method tends to have poor adhesion between the pressure-sensitive adhesive layer and the substrate. Therefore, it is preferable to obtain a double-sided silicone pressure-sensitive adhesive sheet using a direct coating method. Specifically, a single-sided silicone pressure-sensitive adhesive sheet is obtained by applying a silicone-based pressure-sensitive adhesive coating liquid to one surface (first substrate surface) of a substrate to form a first pressure-sensitive adhesive layer. . Thereafter, for example, a single-sided silicone pressure-sensitive adhesive sheet wound up in a roll shape is fed out, and a second pressure-sensitive adhesive layer is applied by applying a silicone-based pressure-sensitive adhesive coating solution to the other side of the base material (second base material surface). A double-sided silicone pressure-sensitive adhesive sheet is produced by forming
However, when the double-sided silicone pressure-sensitive adhesive sheet was produced by the above method, it was confirmed that the charge amount of the single-sided silicone pressure-sensitive adhesive sheet was increased when the single-sided silicone pressure-sensitive adhesive sheet was fed out. In the process of applying the silicone adhesive coating liquid to the second substrate surface and forming the second adhesive layer, the silicone-based adhesive is generated by the static electricity of the single-sided silicone adhesive sheet generated when the single-sided silicone adhesive sheet is unwound. The organic solvent in the adhesive coating solution may ignite and cause a fire.

　本発明の目的は、直塗り法で両面シリコーン粘着シートを製造する工程において、片面シリコーン粘着シートの繰り出し時に発生した片面シリコーン粘着シートの静電気により、シリコーン系粘着剤の塗工液の有機溶媒が発火する虞がなく、安全に製造できる両面シリコーン粘着シートの製造方法を提供することである。本発明の別の目的は、帯電量の増加が抑制された、安全性の高い、両面シリコーン粘着シートを提供することである。 The object of the present invention is to ignite the organic solvent of the silicone adhesive coating liquid by static electricity of the single-sided silicone pressure-sensitive adhesive sheet generated when the single-sided silicone pressure-sensitive adhesive sheet is fed out in the process of producing the double-sided silicone pressure-sensitive adhesive sheet by the direct coating method. It is an object of the present invention to provide a method for producing a double-sided silicone pressure-sensitive adhesive sheet that can be safely produced without fear of the occurrence. Another object of the present invention is to provide a highly safe double-sided silicone pressure-sensitive adhesive sheet in which an increase in charge amount is suppressed.

　本発明の一態様によれば、基材の第一の基材面に、シリコーン系粘着剤を含有する第一の塗工液を塗布して第一の粘着剤層を形成する工程と、前記第一の粘着剤層に第一の剥離フィルムを積層し、帯電防止性能を有する片面シリコーン粘着シートを得る工程と、前記片面シリコーン粘着シートをロール状に巻き取る工程と、ロール状に巻き取られた前記片面シリコーン粘着シートを繰り出す工程と、前記基材の前記第一の基材面とは反対側の第二の基材面に、シリコーン系粘着剤を含有する第二の塗工液を塗布して第二の粘着剤層を形成する工程と、前記第二の粘着剤層に第二の剥離フィルムを積層し、ロール状に巻き取る工程と、を有する、両面シリコーン粘着シートの製造方法が提供される。 According to one aspect of the present invention, the first pressure-sensitive adhesive layer is formed by applying a first coating liquid containing a silicone-based pressure-sensitive adhesive to the first base material surface of the base material, The first release film is laminated on the first pressure-sensitive adhesive layer to obtain a single-sided silicone pressure-sensitive adhesive sheet having antistatic performance, the step of winding the single-sided silicone pressure-sensitive adhesive sheet into a roll shape, and the film is wound into a roll shape. And applying a second coating liquid containing a silicone-based pressure-sensitive adhesive to the step of feeding out the one-sided silicone pressure-sensitive adhesive sheet and the second base material surface opposite to the first base material surface of the base material. And forming the second pressure-sensitive adhesive layer, and laminating the second release film on the second pressure-sensitive adhesive layer and winding it into a roll. Provided.

　本発明の一態様に係る両面シリコーン粘着シートの製造方法において、前記第一の塗工液は、帯電防止剤を含有することが好ましい。 In the method for producing a double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, the first coating liquid preferably contains an antistatic agent.

　本発明の一態様に係る両面シリコーン粘着シートの製造方法において、前記第一の塗工液が含有する前記帯電防止剤は、イオン導電性シリコーン系化合物であることが好ましい。 In the method for producing a double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, the antistatic agent contained in the first coating liquid is preferably an ion conductive silicone compound.

　本発明の一態様に係る両面シリコーン粘着シートの製造方法において、前記第一の塗工液が含有する前記帯電防止剤は、イオン性基含有シリコーンオリゴマー、あるいはアルカリ金属塩を溶解させたシリコーンオイルであることが好ましい。 In the method for producing a double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, the antistatic agent contained in the first coating liquid is an ionic group-containing silicone oligomer or a silicone oil in which an alkali metal salt is dissolved. Preferably there is.

　本発明の一態様に係る両面シリコーン粘着シートの製造方法において、前記第二の塗工液は、帯電防止剤を含有することが好ましい。 In the method for producing a double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, the second coating liquid preferably contains an antistatic agent.

　本発明の一態様に係る両面シリコーン粘着シートの製造方法において、前記基材は、長尺状（帯状）であることが好ましい。 In the method for producing a double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, it is preferable that the substrate has a long shape (band shape).

　本発明の一態様に係る両面シリコーン粘着シートの製造方法において、前記基材は、ポリイミドフィルムであることが好ましい。 In the method for producing a double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, the base material is preferably a polyimide film.

　本発明の一態様に係る両面シリコーン粘着シートの製造方法において、ロール状の前記片面シリコーン粘着シートから、Ａ４サイズの試験片を、複数、作製し、複数の前記試験片を重ねて積層体を作製し、前記積層体の最表層から一枚の前記試験片を取り出し、前記積層体から一枚の前記試験片を取り出してから６０秒経過後の一枚の前記試験片の帯電量が１０ｋＶ以下であることが好ましい。 In the method for producing a double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, a plurality of A4-sized test pieces are produced from the roll-like single-sided silicone pressure-sensitive adhesive sheet, and a plurality of the test pieces are stacked to produce a laminate. Then, one piece of the test piece is taken out from the outermost layer of the laminate, and the charge amount of one piece of the test piece after 10 seconds from taking out the one piece of test piece from the laminate is 10 kV or less. Preferably there is.

　また、本発明の一態様によれば、第一の基材面と前記第一の基材面とは反対側の第二の基材面とを有する基材と、前記第一の基材面に設けられた第一の粘着剤層と、前記第一の粘着剤層に積層された第一の剥離フィルムと、前記第二の基材面に設けられた第二の粘着剤層と、前記第二の粘着剤層に積層された第二の剥離フィルムと、を備え、前記第一の粘着剤層及び前記第二の粘着剤層は、シリコーン系粘着剤を含有し、前記第一の粘着剤層は、帯電防止性能を有する、両面シリコーン粘着シートが提供される。 Moreover, according to one aspect of the present invention, the substrate having the first substrate surface and the second substrate surface opposite to the first substrate surface, and the first substrate surface A first pressure-sensitive adhesive layer provided on the first pressure-sensitive adhesive layer, a first release film laminated on the first pressure-sensitive adhesive layer, a second pressure-sensitive adhesive layer provided on the second substrate surface, A second release film laminated on the second pressure-sensitive adhesive layer, wherein the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer contain a silicone pressure-sensitive adhesive, and the first pressure-sensitive adhesive layer The agent layer is provided with a double-sided silicone pressure-sensitive adhesive sheet having antistatic performance.

　本発明の一態様に係る両面シリコーン粘着シートにおいて、前記基材は、長尺状（帯状）であることが好ましい。 In the double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, the base material is preferably long (band-shaped).

　本発明の一態様に係る両面シリコーン粘着シートにおいて、前記基材は、ポリイミドフィルムであることが好ましい。 In the double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, the base material is preferably a polyimide film.

　本発明の一態様に係る両面シリコーン粘着シートにおいて、前記第一の粘着剤層は、帯電防止剤を含有することが好ましい。 In the double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, the first pressure-sensitive adhesive layer preferably contains an antistatic agent.

　本発明の一態様に係る両面シリコーン粘着シートにおいて、前記第一の粘着剤層が含有する前記帯電防止剤は、イオン導電性シリコーン系化合物であることが好ましい。 In the double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, the antistatic agent contained in the first pressure-sensitive adhesive layer is preferably an ion conductive silicone compound.

　本発明の一態様に係る両面シリコーン粘着シートにおいて、前記第一の粘着剤層が含有する前記帯電防止剤は、イオン性基含有シリコーンオリゴマー、あるいはアルカリ金属塩を溶解させたシリコーンオイルであることが好ましい。 In the double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, the antistatic agent contained in the first pressure-sensitive adhesive layer is an ionic group-containing silicone oligomer or a silicone oil in which an alkali metal salt is dissolved. preferable.

　本発明の一態様に係る両面シリコーン粘着シートにおいて、前記第二の粘着剤層は、帯電防止剤を含有することが好ましい。 In the double-sided silicone pressure-sensitive adhesive sheet according to one aspect of the present invention, the second pressure-sensitive adhesive layer preferably contains an antistatic agent.

　本発明によれば、直塗り法で両面シリコーン粘着シートを製造する工程において、片面シリコーン粘着シートの繰り出し時に発生した片面シリコーン粘着シートの静電気により、シリコーン系粘着剤の塗工液の有機溶媒が発火する虞がなく、安全に製造できる両面シリコーン粘着シートの製造方法を提供できる。また、本発明によれば、帯電量の増加が抑制された、安全性の高い、両面シリコーン粘着シートを提供できる。 According to the present invention, in the process of producing a double-sided silicone pressure-sensitive adhesive sheet by a direct coating method, the organic solvent of the silicone-based pressure-sensitive adhesive coating liquid is ignited by static electricity of the single-sided silicone pressure-sensitive adhesive sheet generated when the single-sided silicone pressure-sensitive adhesive sheet is fed out. Therefore, it is possible to provide a method for producing a double-sided silicone pressure-sensitive adhesive sheet that can be safely produced. In addition, according to the present invention, a highly safe double-sided silicone pressure-sensitive adhesive sheet in which an increase in charge amount is suppressed can be provided.

実施形態に係る両面シリコーン粘着シートの断面概略図である。It is a section schematic diagram of the double-sided silicone adhesive sheet concerning an embodiment. 実施形態に係る両面シリコーン粘着シートの製造装置の一部を説明する図である。It is a figure explaining a part of manufacturing apparatus of the double-sided silicone adhesive sheet which concerns on embodiment. 実施形態に係る両面シリコーン粘着シートの製造工程の一部を説明する図である。It is a figure explaining a part of manufacturing process of the double-sided silicone adhesive sheet which concerns on embodiment. 実施形態に係る両面シリコーン粘着シートの製造工程の一部を説明する図である。It is a figure explaining a part of manufacturing process of the double-sided silicone adhesive sheet which concerns on embodiment. 実施形態に係る両面シリコーン粘着シートの製造工程の一部を説明する図である。It is a figure explaining a part of manufacturing process of the double-sided silicone adhesive sheet which concerns on embodiment. 実施形態に係る両面シリコーン粘着シートの製造工程の一部を説明する図である。It is a figure explaining a part of manufacturing process of the double-sided silicone adhesive sheet which concerns on embodiment. 実施形態に係る両面シリコーン粘着シートの製造工程の一部を説明する図である。It is a figure explaining a part of manufacturing process of the double-sided silicone adhesive sheet which concerns on embodiment. 実施形態の変形に係る両面シリコーン粘着シートの断面概略図である。It is a section schematic diagram of a double-sided silicone adhesive sheet concerning a modification of an embodiment.

［両面シリコーン粘着シート］
　図１には、本実施形態の両面シリコーン粘着シート１の断面概略図が示されている。
　両面シリコーン粘着シート１は、第一の基材面１１ａと第一の基材面１１ａとは反対側の第二の基材面１１ｂとを有する基材１１と、第一の基材面１１ａに設けられた第一の粘着剤層２１と、第一の粘着剤層２１に積層された第一の剥離フィルム３１と、第二の基材面１１ｂに設けられた第二の粘着剤層２２と、第二の粘着剤層２２に積層された第二の剥離フィルム３２と、を備えている。
　第一の粘着剤層２１及び第二の粘着剤層２２は、シリコーン系粘着剤を含有している。
　第一の粘着剤層２１は、帯電防止剤を含有することが好ましい。さらに、第二の粘着剤層２２も、帯電防止剤を含有することが可能である。
　両面シリコーン粘着シート１の形状は、例えば、シート状、テープ状、ラベル状などあらゆる形状をとり得る。 [Double-sided silicone adhesive sheet]
The cross-sectional schematic of the double-sided silicone adhesive sheet 1 of this embodiment is shown by FIG.
The double-sided silicone pressure-sensitive adhesive sheet 1 includes a base material 11 having a first base material surface 11a and a second base material surface 11b opposite to the first base material surface 11a, and a first base material surface 11a. The first pressure-sensitive adhesive layer 21 provided, the first release film 31 laminated on the first pressure-sensitive adhesive layer 21, and the second pressure-sensitive adhesive layer 22 provided on the second substrate surface 11b And a second release film 32 laminated on the second pressure-sensitive adhesive layer 22.
The first pressure-sensitive adhesive layer 21 and the second pressure-sensitive adhesive layer 22 contain a silicone-based pressure-sensitive adhesive.
The first pressure-sensitive adhesive layer 21 preferably contains an antistatic agent. Furthermore, the second pressure-sensitive adhesive layer 22 can also contain an antistatic agent.
The shape of the double-sided silicone pressure-sensitive adhesive sheet 1 can take any shape such as a sheet shape, a tape shape, and a label shape.

（基材）
　基材１１としては、例えば、合成樹脂フィルムなどのシート材料などを用いることができる。合成樹脂フィルムとしては、例えば、ポリイミドフィルム、ポリエチレンフィルム、ポリプロピレンフィルム、ポリブテンフィルム、ポリブタジエンフィルム、ポリメチルペンテンフィルム、ポリ塩化ビニルフィルム、塩化ビニル共重合体フィルム、ポリエチレンテレフタレートフィルム、ポリエチレンナフタレートフィルム、ポリブチレンテレフタレートフィルム、ポリウレタンフィルム、エチレン酢酸ビニル共重合体フィルム、アイオノマー樹脂フィルム、エチレン・（メタ）アクリル酸共重合体フィルム、エチレン・（メタ）アクリル酸エステル共重合体フィルム、ポリスチレンフィルム、及びポリカーボネートフィルム等が挙げられる。その他、基材１１としては、これらの合成樹脂フィルムの架橋フィルム及び積層フィルム等が挙げられる。基材１１は、帯電防止性を有してもよい。
　耐熱性の観点からは、基材１１は、ポリイミドフィルムであることが好ましい。
　基材１１は、長尺状（帯状）であることが好ましい。長尺状の基材１１を用いることにより、長尺状の両面シリコーン粘着シート１を製造でき、いわゆるロール・トゥ・ロール方式での生産が可能になり、両面シリコーン粘着シート１の生産性が向上する。
　基材１１の厚みは、１０μｍ以上５００μｍ以下であることが好ましく、１５μｍ以上３００μｍ以下であることがより好ましく、２０μｍ以上２５０μｍ以下であることがさらに好ましい。 (Base material)
As the base material 11, for example, a sheet material such as a synthetic resin film can be used. Examples of synthetic resin films include polyimide film, polyethylene film, polypropylene film, polybutene film, polybutadiene film, polymethylpentene film, polyvinyl chloride film, vinyl chloride copolymer film, polyethylene terephthalate film, polyethylene naphthalate film, poly Butylene terephthalate film, polyurethane film, ethylene vinyl acetate copolymer film, ionomer resin film, ethylene / (meth) acrylic acid copolymer film, ethylene / (meth) acrylic acid ester copolymer film, polystyrene film, and polycarbonate film Etc. In addition, as the base material 11, the crosslinked film of these synthetic resin films, a laminated film, etc. are mentioned. The base material 11 may have antistatic properties.
From the viewpoint of heat resistance, the substrate 11 is preferably a polyimide film.
The substrate 11 is preferably long (band-shaped). By using the long base material 11, the long double-sided silicone pressure-sensitive adhesive sheet 1 can be manufactured, and production by a so-called roll-to-roll method is possible, and the productivity of the double-sided silicone pressure-sensitive adhesive sheet 1 is improved. To do.
The thickness of the substrate 11 is preferably 10 μm or more and 500 μm or less, more preferably 15 μm or more and 300 μm or less, and further preferably 20 μm or more and 250 μm or less.

（粘着剤層）
　第一の粘着剤層２１及び第二の粘着剤層２２を構成する粘着剤組成物は、シリコーン系粘着剤を含有する。第一の粘着剤層２１の粘着剤組成物に含有されるシリコーン系粘着剤と、第二の粘着剤層２２の粘着剤組成物に含有されるシリコーン系粘着剤とは、互いに同一であってもよく、異なっていてもよい。 (Adhesive layer)
The pressure-sensitive adhesive composition constituting the first pressure-sensitive adhesive layer 21 and the second pressure-sensitive adhesive layer 22 contains a silicone pressure-sensitive adhesive. The silicone pressure-sensitive adhesive contained in the pressure-sensitive adhesive composition of the first pressure-sensitive adhesive layer 21 and the silicone pressure-sensitive adhesive contained in the pressure-sensitive adhesive composition of the second pressure-sensitive adhesive layer 22 are the same as each other. May be different.

　第一の粘着剤層２１を構成する粘着剤組成物は、シリコーン系粘着剤、及び帯電防止剤を含有することが好ましい。帯電防止剤について、詳細は後述する。
　第二の粘着剤層２２を構成する粘着剤組成物は、シリコーン系粘着剤を含有し、帯電防止剤をさらに含有してもよく、帯電防止剤を含有していなくてもよい。 The pressure-sensitive adhesive composition constituting the first pressure-sensitive adhesive layer 21 preferably contains a silicone pressure-sensitive adhesive and an antistatic agent. Details of the antistatic agent will be described later.
The pressure-sensitive adhesive composition constituting the second pressure-sensitive adhesive layer 22 contains a silicone-based pressure-sensitive adhesive, may further contain an antistatic agent, and may not contain an antistatic agent.

　第一の粘着剤層２１及び第二の粘着剤層２２の厚みは、それぞれ独立に、１μｍ以上１００μｍ以下であることが好ましく、２μｍ以上８０μｍ以下であることがより好ましく、５μｍ以上５０μｍ以下であることがさらに好ましい。第一の粘着剤層２１及び第二の粘着剤層２２の厚みが１μｍ未満の場合には、得られる粘着テープの接着力が十分ではない虞がある。一方、第一の粘着剤層２１及び第二の粘着剤層２２の厚みが１００μｍを超える場合には、粘着性能の向上が無く不経済である。また、第一の粘着剤層２１及び第二の粘着剤層２２の厚みが１００μｍを超える場合には、粘着シートの貼合時における粘着剤のはみ出しの原因となる虞、及び粘着シートを被着体から剥離する時の粘着剤層の凝集破壊の原因となる虞がある。 The thicknesses of the first pressure-sensitive adhesive layer 21 and the second pressure-sensitive adhesive layer 22 are each independently preferably 1 μm or more and 100 μm or less, more preferably 2 μm or more and 80 μm or less, and 5 μm or more and 50 μm or less. More preferably. When the thickness of the 1st adhesive layer 21 and the 2nd adhesive layer 22 is less than 1 micrometer, there exists a possibility that the adhesive force of the adhesive tape obtained may not be enough. On the other hand, when the thickness of the 1st adhesive layer 21 and the 2nd adhesive layer 22 exceeds 100 micrometers, there is no improvement of adhesive performance and it is uneconomical. Further, when the thickness of the first pressure-sensitive adhesive layer 21 and the second pressure-sensitive adhesive layer 22 exceeds 100 μm, it may cause the pressure-sensitive adhesive to stick out at the time of bonding of the pressure-sensitive adhesive sheet, and attach the pressure-sensitive adhesive sheet. There is a risk of causing cohesive failure of the pressure-sensitive adhesive layer when peeling from the body.

・シリコーン系粘着剤
　シリコーン系粘着剤としては、例えば、オルガノポリシロキサンを含有する粘着剤が挙げられ、ジメチルポリシロキサンを含有する粘着剤が好ましい。シリコーン系粘着剤としては、より具体的には、ビニル基等の不飽和基を有するオルガノポリシロキサン、好ましくはビニル基等の不飽和基を有するジメチルポリシロキサン、ヒドロシリル基（ＳｉＨ基）含有の架橋剤、及び白金系触媒により硬化して得られる付加反応型シリコーン系粘着剤、又はＢＰＯ等の有機過酸化物により硬化して得られる過酸化物硬化型シリコーン系粘着剤を使用することができる。ＢＰＯは、Ｂｅｎｚｏｙｌｐｅｒｏｘｉｄｅの略称である。耐熱性の観点から付加反応型シリコーン系粘着剤が好ましい。この場合、得られる粘着力を考慮して該不飽和基の密度に応じて架橋密度を調整することが可能である。このシリコーン系粘着剤層の形成には付加重合させるために加熱等を行うことが必要である。 -Silicone pressure-sensitive adhesive Examples of the silicone pressure-sensitive adhesive include pressure-sensitive adhesives containing organopolysiloxane, and pressure-sensitive adhesives containing dimethylpolysiloxane are preferred. More specifically, the silicone-based pressure-sensitive adhesive is an organopolysiloxane having an unsaturated group such as a vinyl group, preferably a dimethylpolysiloxane having an unsaturated group such as a vinyl group, or a crosslink containing a hydrosilyl group (SiH group). An addition-reactive silicone pressure-sensitive adhesive obtained by curing with an agent and a platinum-based catalyst, or a peroxide-curable silicone pressure-sensitive adhesive obtained by curing with an organic peroxide such as BPO can be used. BPO is an abbreviation for Benzoylperoxide. From the viewpoint of heat resistance, an addition reaction type silicone pressure-sensitive adhesive is preferred. In this case, it is possible to adjust the crosslinking density according to the density of the unsaturated group in consideration of the obtained adhesive strength. For the formation of the silicone pressure-sensitive adhesive layer, heating or the like is required for addition polymerization.

・帯電防止剤
　帯電防止剤としては、特に限定されない。帯電防止剤としては、シリコーン系粘着剤組成物に混合して、シリコーン系粘着剤組成物中に一様に分散可能な化合物が好ましい。例えば、帯電防止剤としては、イオン導電性帯電防止剤、及び導電性微粒子等が挙げられる。また、他の帯電防止剤としては、イオン導電性シリコーン系化合物が挙げられる。帯電防止剤は、イオン導電性帯電防止剤またはイオン導電性シリコーン系化合物が好ましく、イオン導電性シリコーン系化合物がより好ましい。イオン導電性シリコーン系化合物としては、特に限定されない。イオン導電性シリコーン系化合物としては、例えば、イオン性基含有シリコーンオリゴマー、あるいはアルカリ金属塩を溶解させたシリコーンオイル、イオン性基含有シリコーンポリマー等が挙げられる。中でも、シリコーン系粘着剤組成物との分散性が良く、さらに耐熱性、帯電防止性にも優れるという点から、イオン性基含有シリコーンオリゴマー、あるいはアルカリ金属塩を溶解させたシリコーンオイルが好ましい。イオン性基含有シリコーンオリゴマーは、イオン液体をシリコーン変性したシリコーンオリゴマーであり、市販品としては、例えば、信越化学工業（株）製のＸ－４０－２７５０、Ｘ－４０－２４５０、Ｘ－４０－９３１０等が挙げられる。シリコーンオイルに溶解させるアルカリ金属塩としては、リチウム塩が好ましい。第二の粘着剤層２２の粘着剤組成物が、帯電防止剤を含有している場合、第一の粘着剤層２１の粘着剤組成物に含有される帯電防止剤（第一の帯電防止剤と称する場合もある。）と、第二の粘着剤層２２の粘着剤組成物に含有される帯電防止剤（第二の帯電防止剤と称する場合もある。）とは、互いに同一であってもよく、異なっていてもよい。
　帯電防止剤の含有量は、第一の粘着剤層２１及び第二の粘着剤層２２を構成する粘着剤組成物（粘着剤組成物を１００質量％とした場合）に対して０．１質量％以上５０質量％以下であることが好ましく、１．０質量％以上４０質量％以下であることがより好ましい。第一の粘着剤層２１の粘着剤組成物に含有される第一の帯電防止剤の含有量と、第二の粘着剤層２２の粘着剤組成物に含有される第二の帯電防止剤の含有量とは、互いに同一であってもよく、異なっていてもよい。 -Antistatic agent It does not specifically limit as an antistatic agent. As the antistatic agent, a compound that can be mixed in the silicone pressure-sensitive adhesive composition and uniformly dispersed in the silicone-based pressure-sensitive adhesive composition is preferable. For example, examples of the antistatic agent include an ion conductive antistatic agent and conductive fine particles. Other antistatic agents include ionic conductive silicone compounds. The antistatic agent is preferably an ion conductive antistatic agent or an ion conductive silicone compound, and more preferably an ion conductive silicone compound. The ion conductive silicone compound is not particularly limited. Examples of the ion conductive silicone compound include an ionic group-containing silicone oligomer, a silicone oil in which an alkali metal salt is dissolved, an ionic group-containing silicone polymer, and the like. Of these, ionic group-containing silicone oligomers or silicone oils in which alkali metal salts are dissolved are preferred because they are excellent in dispersibility with the silicone-based pressure-sensitive adhesive composition and are excellent in heat resistance and antistatic properties. The ionic group-containing silicone oligomer is a silicone oligomer obtained by modifying a ionic liquid with silicone. Examples of commercially available products include X-40-2750, X-40-2450, and X-40- manufactured by Shin-Etsu Chemical Co., Ltd. 9310 etc. are mentioned. As the alkali metal salt dissolved in the silicone oil, a lithium salt is preferable. When the pressure-sensitive adhesive composition of the second pressure-sensitive adhesive layer 22 contains an antistatic agent, the antistatic agent contained in the pressure-sensitive adhesive composition of the first pressure-sensitive adhesive layer 21 (first antistatic agent) And the antistatic agent (sometimes referred to as a second antistatic agent) contained in the adhesive composition of the second adhesive layer 22 are the same as each other. May be different.
Content of antistatic agent is 0.1 mass with respect to the adhesive composition (when an adhesive composition is 100 mass%) which comprises the 1st adhesive layer 21 and the 2nd adhesive layer 22. % To 50% by mass, more preferably 1.0% to 40% by mass. Of the first antistatic agent contained in the adhesive composition of the first adhesive layer 21 and the second antistatic agent contained in the adhesive composition of the second adhesive layer 22 The contents may be the same as or different from each other.

・その他の成分
　第一の粘着剤層２１及び第二の粘着剤層２２を構成する粘着剤組成物には、本発明の効果を損なわない範囲で、その他の成分が含まれていてもよい。粘着剤組成物に含まれ得るその他の成分としては、例えば、難燃剤、粘着付与剤、紫外線吸収剤、酸化防止剤、防腐剤、防黴剤、可塑剤、消泡剤、及び濡れ性調整剤などが挙げられる。 -Other components The adhesive composition which comprises the 1st adhesive layer 21 and the 2nd adhesive layer 22 may contain the other component in the range which does not impair the effect of this invention. Examples of other components that can be included in the pressure-sensitive adhesive composition include flame retardants, tackifiers, ultraviolet absorbers, antioxidants, antiseptics, antifungal agents, plasticizers, antifoaming agents, and wettability modifiers. Etc.

（剥離フィルム）
　第一の剥離フィルム３１及び第二の剥離フィルム３２としては、特に限定されない。例えば、取り扱い易さの観点から、剥離フィルムは、剥離基材と、剥離基材の少なくとも一方の面上に剥離剤が塗布されて形成された剥離剤層とを備えることが好ましい。
　第一の剥離フィルム３１及び第二の剥離フィルム３２が剥離基材を備える場合、第一の剥離フィルム３１の剥離基材と、第二の剥離フィルム３２の剥離基材とは、互いに同一であってもよく、異なっていてもよい。
　第一の剥離フィルム３１及び第二の剥離フィルム３２が剥離剤層を備える場合、第一の剥離フィルム３１の剥離剤層と、第二の剥離フィルム３２の剥離剤層とは、互いに同一の剥離剤で形成されていてもよく、異なる剥離剤で形成されていてもよい。
　剥離基材としては、例えば、紙基材、この紙基材にポリエチレン等の熱可塑性樹脂をラミネートしたラミネート紙、並びにプラスチックフィルム等が挙げられる。
　紙基材としては、グラシン紙、コート紙、及びキャストコート紙等が挙げられる。プラスチックフィルムとしては、ポリエチレンテレフタレート、ポリブチレンテレフタレート、及びポリエチレンナフタレート等のポリエステルフィルム、並びにポリプロピレン及びポリエチレン等のポリオレフィンフィルム等が挙げられる。
　剥離剤としては、例えば、オレフィン系樹脂、ゴム系エラストマー（例えば、ブタジエン系樹脂、イソプレン系樹脂等）、長鎖アルキル系樹脂、アルキド系樹脂、フッ素系樹脂、及びシリコーン系樹脂が挙げられる。これらの中でも剥離剤としては、オレフィン系樹脂、ゴム系エラストマー（例えば、ブタジエン系樹脂、イソプレン系樹脂等）、長鎖アルキル系樹脂、アルキド系樹脂、及びフッ素系樹脂からなる群から選択されるいずれかの剥離剤であることが好ましく、フッ素系樹脂であることがより好ましい。一般的なシリコーン系樹脂を用いた剥離フィルムは、シリコーン系粘着剤を含有する粘着剤層と重剥離化しやすいという問題がある。したがって、第一の剥離フィルム３１及び第二の剥離フィルム３２の剥離剤層がフッ素系樹脂であれば、シリコーン系粘着剤を含有する第一の粘着剤層２１及び第二の粘着剤層２２との重剥離化を抑制でき、剥離性が良好な両面シリコーン粘着シート１を得ることができる。剥離剤層は、帯電防止剤をさらに含有してもよく、帯電防止剤を含有していなくてもよい。 (Peeling film)
The first release film 31 and the second release film 32 are not particularly limited. For example, from the viewpoint of ease of handling, the release film preferably includes a release substrate and a release agent layer formed by applying a release agent on at least one surface of the release substrate.
When the first release film 31 and the second release film 32 include release substrates, the release substrate of the first release film 31 and the release substrate of the second release film 32 are the same as each other. It may be different.
When the first release film 31 and the second release film 32 include a release agent layer, the release agent layer of the first release film 31 and the release agent layer of the second release film 32 are the same release from each other. It may be formed with an agent or may be formed with a different release agent.
Examples of the release substrate include a paper substrate, a laminated paper obtained by laminating a thermoplastic resin such as polyethylene on the paper substrate, and a plastic film.
Examples of the paper substrate include glassine paper, coated paper, and cast coated paper. Examples of the plastic film include polyester films such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and polyolefin films such as polypropylene and polyethylene.
Examples of the release agent include olefin resins, rubber elastomers (eg, butadiene resins, isoprene resins, etc.), long chain alkyl resins, alkyd resins, fluorine resins, and silicone resins. Among these, the release agent is any selected from the group consisting of olefin resins, rubber elastomers (for example, butadiene resins, isoprene resins, etc.), long chain alkyl resins, alkyd resins, and fluorine resins. Such a release agent is preferable, and a fluororesin is more preferable. A release film using a general silicone resin has a problem that it is easily peeled off from an adhesive layer containing a silicone adhesive. Therefore, if the release agent layer of the first release film 31 and the second release film 32 is a fluororesin, the first adhesive layer 21 and the second adhesive layer 22 containing a silicone-based adhesive, The double-sided silicone pressure-sensitive adhesive sheet 1 having good releasability can be obtained. The release agent layer may further contain an antistatic agent or may not contain an antistatic agent.

　第一の剥離フィルム３１及び第二の剥離フィルム３２の厚みは、特に限定されない。第一の剥離フィルム３１及び第二の剥離フィルム３２の厚みは、２０μｍ以上２００μｍ以下であることが好ましく、２５μｍ以上１５０μｍ以下であることがより好ましい。
　剥離剤層の厚みは、特に限定されない。剥離剤を含む溶液を剥離基材の上に塗布して剥離剤層を形成する場合、剥離剤層の厚みは、０．０１μｍ以上２．０μｍ以下であることが好ましく、０．０３μｍ以上１．０μｍ以下であることがより好ましい。
　剥離基材としてプラスチックフィルムを用いる場合、当該プラスチックフィルムの厚みは、３μｍ以上５０μｍ以下であることが好ましく、５μｍ以上４０μｍ以下であることがより好ましい。 The thickness of the first release film 31 and the second release film 32 is not particularly limited. The thickness of the first release film 31 and the second release film 32 is preferably 20 μm or more and 200 μm or less, and more preferably 25 μm or more and 150 μm or less.
The thickness of the release agent layer is not particularly limited. When a release agent layer is formed by applying a solution containing a release agent on a release substrate, the thickness of the release agent layer is preferably 0.01 μm or more and 2.0 μm or less, and 0.03 μm or more and 1. More preferably, it is 0 μm or less.
When a plastic film is used as the peeling substrate, the thickness of the plastic film is preferably 3 μm or more and 50 μm or less, and more preferably 5 μm or more and 40 μm or less.

・その他の層
　両面シリコーン粘着シート１は、基材１１、第一の粘着剤層２１、第一の剥離フィルム３１、第二の粘着剤層２２、及び第二の剥離フィルム３２以外に、その他の層をさらに備えていてもよい。 -Other layers The double-sided silicone pressure-sensitive adhesive sheet 1 is composed of the base material 11, the first pressure-sensitive adhesive layer 21, the first release film 31, the second pressure-sensitive adhesive layer 22, and the second release film 32. A layer may be further provided.

［両面シリコーン粘着シートの製造方法］
　本実施形態に係る両面シリコーン粘着シート１を製造する方法を説明する。
　本実施形態に係る両面シリコーン粘着シート１の製造方法は、基材１１の第一の基材面１１ａに、シリコーン系粘着剤及び帯電防止剤を含有する第一の塗工液を塗布して第一の粘着剤層２１を形成する工程と、第一の粘着剤層２１に第一の剥離フィルム３１を積層する工程と、基材１１の第一の基材面１１ａとは反対側の第二の基材面１１ｂに、シリコーン系粘着剤を含有する第二の塗工液を塗布して第二の粘着剤層２２を形成する工程と、第二の粘着剤層２２に第二の剥離フィルム３２を積層し、ロール状に巻き取る工程とを有する。 [Method for producing double-sided silicone adhesive sheet]
A method for producing the double-sided silicone pressure-sensitive adhesive sheet 1 according to this embodiment will be described.
In the method for producing a double-sided silicone pressure-sensitive adhesive sheet 1 according to the present embodiment, a first coating liquid containing a silicone-based pressure-sensitive adhesive and an antistatic agent is applied to the first base material surface 11 a of the base material 11. A step of forming one pressure-sensitive adhesive layer 21, a step of laminating the first release film 31 on the first pressure-sensitive adhesive layer 21, and a second side of the base material 11 opposite to the first base material surface 11a. A step of applying a second coating liquid containing a silicone-based pressure-sensitive adhesive to the substrate surface 11b to form a second pressure-sensitive adhesive layer 22, and a second release film on the second pressure-sensitive adhesive layer 22. 32 and laminating them into a roll.

　第一の塗工液及び第二の塗工液は、シリコーン系粘着剤組成物を有機溶媒で希釈することにより調製できる。
　有機溶媒としては、例えば、トルエン、酢酸エチル、及びメチルエチルケトン等が挙げられる。塗工液を塗布する方法は、特に限定されない。塗布方法としては、例えば、スプレーコート法、バーコート法、ナイフコート法、ロールナイフコート法、ロールコート法、ブレードコート法、ダイコート法、及びグラビアコート法等が挙げられる。
　有機溶媒及び低沸点成分が第一の粘着剤層２１及び第二の粘着剤層２２に残留することを防ぐため、塗工液を基材１１に塗布した後、塗膜を加熱して乾燥させる。また、粘着剤組成物に架橋剤が配合されている場合には、架橋反応を進行させて凝集力を向上させるためにも、塗膜を加熱することが好ましい。 The first coating liquid and the second coating liquid can be prepared by diluting the silicone-based pressure-sensitive adhesive composition with an organic solvent.
Examples of the organic solvent include toluene, ethyl acetate, and methyl ethyl ketone. The method for applying the coating liquid is not particularly limited. Examples of the application method include spray coating, bar coating, knife coating, roll knife coating, roll coating, blade coating, die coating, and gravure coating.
In order to prevent the organic solvent and the low-boiling component from remaining in the first pressure-sensitive adhesive layer 21 and the second pressure-sensitive adhesive layer 22, the coating liquid is applied to the substrate 11, and then the coating film is heated and dried. . Moreover, when a crosslinking agent is mix | blended with the adhesive composition, it is preferable to heat a coating film also in order to advance a crosslinking reaction and to improve cohesion force.

　図２には、本実施形態に係る両面シリコーン粘着シート１の粘着シート製造装置１００Ａを説明する概略図が示されている。
　粘着シート製造装置１００Ａは、第一ロール繰り出し部１００と、塗布部２００と、乾燥部３００と、第二ロール繰り出し部４００と、貼合部５００と、ロール巻き取り部６００とを有する。
　第一ロール繰り出し部１００は、ロール状に巻き取られた基材１１及び片面シリコーン粘着シート１０（図３Ｃ参照）を繰り出す。
　塗布部２００は、第一ロール繰り出し部１００にて繰り出された基材１１及び片面シリコーン粘着シート１０に塗工液を塗布して粘着剤層を形成する。
　乾燥部３００は、粘着剤層を乾燥させて、塗工液に含まれていた有機溶媒等を除去する。
　第二ロール繰り出し部４００は、ロール状に巻き取られた剥離フィルムを繰り出す。
　貼合部５００は、乾燥部３００にて乾燥された粘着剤層に、第二ロール繰り出し部４００から繰り出された剥離フィルムを積層する。
　ロール巻き取り部６００は、剥離フィルムを積層後のシート（片面シリコーン粘着シート１０及び両面シリコーン粘着シート１）をロール状に巻き取る。 FIG. 2 shows a schematic diagram for explaining the pressure-sensitive adhesive sheet manufacturing apparatus 100A for the double-sided silicone pressure-sensitive adhesive sheet 1 according to the present embodiment.
The pressure-sensitive adhesive sheet manufacturing apparatus 100 </ b> A includes a first roll feeding unit 100, a coating unit 200, a drying unit 300, a second roll feeding unit 400, a bonding unit 500, and a roll winding unit 600.
The 1st roll supply part 100 pays out the base material 11 and the single-sided silicone adhesive sheet 10 (refer FIG. 3C) wound up by roll shape.
The coating unit 200 applies a coating liquid to the base material 11 and the single-sided silicone pressure-sensitive adhesive sheet 10 that has been fed by the first roll feeding unit 100 to form a pressure-sensitive adhesive layer.
The drying unit 300 dries the pressure-sensitive adhesive layer and removes the organic solvent and the like contained in the coating liquid.
The 2nd roll supply part 400 pays out the peeling film wound up by roll shape.
The bonding unit 500 laminates the release film fed from the second roll feeding unit 400 on the pressure-sensitive adhesive layer dried by the drying unit 300.
The roll winding unit 600 winds up the sheet (the single-sided silicone pressure-sensitive adhesive sheet 10 and the double-sided silicone pressure-sensitive adhesive sheet 1) on which the release film is laminated in a roll shape.

　図３Ａ～図３Ｅには、本実施形態に係る両面シリコーン粘着シート１の製造方法を説明する概略図が示されている。本実施形態では、粘着シート製造装置１００Ａを用いて製造する方法を例に挙げて説明する。本実施形態に係る両面シリコーン粘着シート１は、具体的には、次のような工程を経て製造される。
　図３Ａには、第一の基材面１１ａ及び第二の基材面１１ｂを有する基材１１の断面概略図が示されている。本実施形態では、まず、ロール状に巻き取られた長尺状の基材１１を、第一ロール繰り出し部１００に設置する。
　次に、第一の基材面１１ａが上面になるように基材１１を第一ロール繰り出し部１００にて繰り出し、塗布部２００へ搬送する。塗布部２００にて基材１１の第一の基材面１１ａに、シリコーン系粘着剤及び帯電防止剤を含有する第一の塗工液を塗布して第一の粘着剤層２１を形成する（図３Ｂ参照）。その後、基材１１及び第一の粘着剤層２１を有する第一の積層体を塗布部２００から乾燥部３００へ搬送し、第一の粘着剤層２１を乾燥させる。
　さらに、第一の積層体を乾燥部３００から貼合部５００へ搬送し、第一の粘着剤層２１に第一の剥離フィルム３１を積層する（図３Ｃ参照）。第一の剥離フィルム３１は、ロール状に巻き取られた長尺状のフィルムであり、第二ロール繰り出し部４００から繰り出されて貼合部５００へと搬送され、貼合部５００にて、第一の積層体と貼り合わされる。
　このようにして、基材１１と第一の剥離フィルム３１との間に第一の粘着剤層２１を備えた第二の積層体（片面シリコーン粘着シート１０）を得る（図３Ｃ参照）。
　本実施形態に係る製造方法は、第二の粘着剤層２２を形成する前に、片面シリコーン粘着シート１０を、ロール状に巻き取る工程を有する。
　本実施形態に係る製造方法は、さらに、ロール状に巻き取られた片面シリコーン粘着シート１０を図２の第一ロール繰り出し部１００に設置し、第二の基材面１１ｂが上面になるように繰り出す工程を有する。繰り出された片面シリコーン粘着シート１０は、塗布部２００へ搬送される。
　塗布部２００に搬送された片面シリコーン粘着シート１０の第二の基材面１１ｂに、シリコーン系粘着剤を含有する第二の塗工液を塗布して第二の粘着剤層２２を形成する（図３Ｄ参照）。その後、第三の積層体（基材１１、第一の粘着剤層２１、第一の剥離フィルム３１及び第二の粘着剤層２２を有する積層体）を塗布部２００から乾燥部３００へ搬送し、第二の粘着剤層２２を乾燥させる。
　さらに、第三の積層体を乾燥部３００から貼合部５００へ搬送し、第二の粘着剤層２２に第二の剥離フィルム３２を積層する（図３Ｅ参照）。第二の剥離フィルム３２は、ロール状に巻き取られた長尺状のフィルムであり、第二ロール繰り出し部４００から繰り出されて貼合部５００へと搬送され、貼合部５００にて、第三の積層体と貼り合わされる。
　このようにして、基材１１と第一の剥離フィルム３１との間に第一の粘着剤層２１を備え、基材１１と第二の剥離フィルム３２との間に第二の粘着剤層２２を備えた両面シリコーン粘着シート１を得る（図３Ｅ参照）。
　このようにして製造した両面シリコーン粘着シート１は、例えば、図２のロール巻き取り部６００でロール状に巻き取られる。 3A to 3E are schematic views for explaining a method for producing the double-sided silicone pressure-sensitive adhesive sheet 1 according to the present embodiment. In the present embodiment, a method of manufacturing using the pressure-sensitive adhesive sheet manufacturing apparatus 100A will be described as an example. Specifically, the double-sided silicone pressure-sensitive adhesive sheet 1 according to this embodiment is manufactured through the following steps.
FIG. 3A shows a schematic cross-sectional view of a substrate 11 having a first substrate surface 11a and a second substrate surface 11b. In the present embodiment, first, the long base material 11 wound up in a roll shape is installed in the first roll feeding unit 100.
Next, the base material 11 is fed by the first roll feeding unit 100 so that the first base material surface 11 a becomes the upper surface, and is conveyed to the coating unit 200. A first pressure-sensitive adhesive layer 21 is formed by applying a first coating liquid containing a silicone-based pressure-sensitive adhesive and an antistatic agent to the first base material surface 11a of the base material 11 at the application unit 200 ( (See FIG. 3B). Then, the 1st laminated body which has the base material 11 and the 1st adhesive layer 21 is conveyed from the application part 200 to the drying part 300, and the 1st adhesive layer 21 is dried.
Furthermore, a 1st laminated body is conveyed from the drying part 300 to the bonding part 500, and the 1st peeling film 31 is laminated | stacked on the 1st adhesive layer 21 (refer FIG. 3C). The first release film 31 is a long film wound up in a roll shape, and is fed from the second roll feeding unit 400 and conveyed to the bonding unit 500. One laminate is attached.
Thus, the 2nd laminated body (single-sided silicone adhesive sheet 10) provided with the 1st adhesive layer 21 between the base material 11 and the 1st peeling film 31 is obtained (refer FIG. 3C).
The manufacturing method according to the present embodiment includes a step of winding the single-sided silicone pressure-sensitive adhesive sheet 10 into a roll before forming the second pressure-sensitive adhesive layer 22.
In the manufacturing method according to the present embodiment, the single-sided silicone pressure-sensitive adhesive sheet 10 wound up in a roll shape is further installed in the first roll feeding portion 100 in FIG. 2 so that the second base material surface 11b becomes the upper surface. A step of feeding out. The one-sided silicone pressure-sensitive adhesive sheet 10 that has been fed out is conveyed to the application unit 200.
The 2nd coating liquid containing a silicone type adhesive agent is apply | coated to the 2nd base material surface 11b of the single-sided silicone adhesive sheet 10 conveyed by the application part 200, and the 2nd adhesive layer 22 is formed ( (See FIG. 3D). Thereafter, the third laminate (the laminate having the substrate 11, the first pressure-sensitive adhesive layer 21, the first release film 31 and the second pressure-sensitive adhesive layer 22) is conveyed from the application unit 200 to the drying unit 300. Then, the second pressure-sensitive adhesive layer 22 is dried.
Furthermore, a 3rd laminated body is conveyed from the drying part 300 to the bonding part 500, and the 2nd peeling film 32 is laminated | stacked on the 2nd adhesive layer 22 (refer FIG. 3E). The second release film 32 is a long film wound up in a roll shape, and is fed out from the second roll feeding unit 400 and conveyed to the bonding unit 500. Bonded with the three laminates.
In this way, the first pressure-sensitive adhesive layer 21 is provided between the base material 11 and the first release film 31, and the second pressure-sensitive adhesive layer 22 is provided between the base material 11 and the second release film 32. A double-sided silicone pressure-sensitive adhesive sheet 1 provided with (see FIG. 3E) is obtained.
The double-sided silicone pressure-sensitive adhesive sheet 1 thus manufactured is wound up in a roll shape by, for example, the roll winding unit 600 in FIG.

　本実施形態に係る両面シリコーン粘着シート１は、粘着シート製造装置１００Ａを用いて製造できる。本発明は、粘着シート製造装置１００Ａを用いて製造した両面シリコーン粘着シート１及び粘着シート製造装置１００Ａを使用して実施する両面シリコーン粘着シート１の製造方法に限定されない。 The double-sided silicone pressure-sensitive adhesive sheet 1 according to this embodiment can be manufactured using a pressure-sensitive adhesive sheet manufacturing apparatus 100A. This invention is not limited to the manufacturing method of the double-sided silicone adhesive sheet 1 manufactured using the adhesive sheet manufacturing apparatus 100A and the double-sided silicone adhesive sheet 1 implemented using the adhesive sheet manufacturing apparatus 100A.

　シリコーン系粘着剤と基材１１との密着性を得るための観点から、第一の塗工液及び第二の塗工液を、直接、基材１１に塗布して、第一の粘着剤層２１及び第二の粘着剤層２２を形成することが好ましい。 From the viewpoint of obtaining adhesion between the silicone-based pressure-sensitive adhesive and the base material 11, the first coating liquid and the second coating liquid are directly applied to the base material 11, and the first pressure-sensitive adhesive layer. 21 and the second pressure-sensitive adhesive layer 22 are preferably formed.

　片面シリコーン粘着シート１０の帯電量は、１０ｋＶ以下であることが好ましい。なお、片面シリコーン粘着シート１０の帯電量は、後述の実施例の方法で測定した値である。片面シリコーン粘着シート１０の当該帯電量が１０ｋＶ以下であれば、発火の虞がなく第二の粘着剤組成物を直塗り法で塗布できる。 The charge amount of the single-sided silicone pressure-sensitive adhesive sheet 10 is preferably 10 kV or less. In addition, the charge amount of the single-sided silicone pressure-sensitive adhesive sheet 10 is a value measured by a method of an example described later. If the charge amount of the single-sided silicone pressure-sensitive adhesive sheet 10 is 10 kV or less, there is no risk of ignition and the second pressure-sensitive adhesive composition can be applied by a direct coating method.

［実施形態の効果］
　本実施形態に係る両面シリコーン粘着シートの製造方法によれば、直塗り法で両面シリコーン粘着シートを製造する工程において、片面シリコーン粘着シートの繰り出し時に、片面シリコーン粘着シートの静電気によりシリコーン系粘着剤の塗工液の有機溶媒が発火する虞がなく、両面シリコーン粘着シートを安全に製造できる。 [Effect of the embodiment]
According to the method for producing a double-sided silicone pressure-sensitive adhesive sheet according to the present embodiment, in the step of producing a double-sided silicone pressure-sensitive adhesive sheet by a direct coating method, when the single-sided silicone pressure-sensitive adhesive sheet is fed out, There is no risk of the organic solvent in the coating liquid igniting, and a double-sided silicone adhesive sheet can be produced safely.

　本実施形態に係る両面シリコーン粘着シートは、帯電量の増加が抑制された、安全性の高い、両面シリコーン粘着シートとして利用できる。
　また、本実施形態に係る両面シリコーン粘着シートは、耐熱性のシリコーン系粘着剤を含む両面シリコーン粘着シートとして利用できる。本実施形態に係る両面シリコーン粘着シートは、例えば、高温条件が必要になる電子デバイスの製造工程において好適に利用できる。さらに、本実施形態に係る両面シリコーン粘着シートにおいて、基材として耐熱性のポリイミドフィルムを用いることによって、上記の電子デバイスの製造工程においてより好適に利用できる。 The double-sided silicone pressure-sensitive adhesive sheet according to this embodiment can be used as a highly safe double-sided silicone pressure-sensitive adhesive sheet in which an increase in charge amount is suppressed.
Moreover, the double-sided silicone adhesive sheet which concerns on this embodiment can be utilized as a double-sided silicone adhesive sheet containing a heat-resistant silicone adhesive. The double-sided silicone pressure-sensitive adhesive sheet according to the present embodiment can be suitably used, for example, in an electronic device manufacturing process that requires high temperature conditions. Furthermore, in the double-sided silicone pressure-sensitive adhesive sheet according to this embodiment, by using a heat-resistant polyimide film as a base material, it can be more suitably used in the manufacturing process of the electronic device.

［実施形態の変形］
　本発明は、上記の実施形態に何ら限定されない。本発明は、本発明の目的を達成できる範囲で、上記の実施形態を変形した態様などを含む。 [Modification of Embodiment]
The present invention is not limited to the above embodiment. The present invention includes an aspect obtained by modifying the above-described embodiment as long as the object of the present invention can be achieved.

　両面シリコーン粘着シートの別の態様としては、図４に示されるような、基材１１と、第一の基材面１１ａに設けられた第一の粘着剤層２１と、第一の粘着剤層２１に積層された両面剥離フィルム３３と、第二の基材面１１ｂに設けられた第二の粘着剤層２２と、を備え、第二の粘着剤層２２には第二の剥離フィルム３２が積層されていない、両面シリコーン粘着シート１Ａが挙げられる。両面剥離フィルム３３は、両面が剥離性を有する。両面剥離フィルム３３は、剥離基材と、剥離基材の両面に形成された剥離剤層とを備えることが好ましい。両面剥離フィルム３３の剥離基材及び剥離剤層は、第一の剥離フィルム３１及び第二の剥離フィルム３２と同様の剥離基材及び剥離剤層でもよい。
　両面シリコーン粘着シート１Ａがシート片状である場合、複数の両面シリコーン粘着シート１Ａを積層させて、積層体としてもよい。この積層体においては、両面シリコーン粘着シート１Ａの両面剥離フィルム３３の外表面側に、別の両面シリコーン粘着シート１Ａの第二の粘着剤層２２を積層させることができる。このような積層状態とすることで、第二の粘着剤層２２を保護しつつ、シート片状の両面シリコーン粘着シート１Ａを積層体から１枚ずつ剥離して使用することができる。
　また、両面シリコーン粘着シート１Ａが長尺状である場合、芯材に巻き取って、ロール状として保管することができる。 As another aspect of the double-sided silicone pressure-sensitive adhesive sheet, as shown in FIG. 4, the base material 11, the first pressure-sensitive adhesive layer 21 provided on the first base material surface 11a, and the first pressure-sensitive adhesive layer 21 and a second pressure-sensitive adhesive layer 22 provided on the second base material surface 11b, and the second pressure-sensitive adhesive layer 22 includes a second release film 32. A double-sided silicone pressure-sensitive adhesive sheet 1A that is not laminated is exemplified. Both surfaces of the double-sided release film 33 have peelability. The double-sided release film 33 preferably includes a release base and a release agent layer formed on both sides of the release base. The release substrate and release agent layer of the double-sided release film 33 may be the same release substrate and release agent layer as the first release film 31 and the second release film 32.
When the double-sided silicone pressure-sensitive adhesive sheet 1A is a sheet piece, a plurality of double-sided silicone pressure-sensitive adhesive sheets 1A may be laminated to form a laminate. In this laminate, the second pressure-sensitive adhesive layer 22 of another double-sided silicone pressure-sensitive adhesive sheet 1A can be laminated on the outer surface side of the double-sided release film 33 of the double-sided silicone pressure-sensitive adhesive sheet 1A. By setting it as such a lamination | stacking state, 1 A of sheet piece-like double-sided silicone adhesive sheets can be peeled from the laminated body one by one, protecting the 2nd adhesive layer 22, and can be used.
Moreover, when double-sided silicone adhesive sheet 1A is elongate, it can be wound around a core material and stored as a roll.

　前記実施形態においては、帯電防止性能を有する片面シリコーン粘着シートを得る方法として、シリコーン系粘着剤及び帯電防止剤を含有する第一の塗工液を塗布して第一の粘着剤層を形成する方法を例に挙げて説明したが、本発明はこのような態様に限定されない。帯電防止性能を有する片面シリコーン粘着シートとしては、次のような態様が挙げられる。 In the embodiment, as a method for obtaining a single-sided silicone pressure-sensitive adhesive sheet having antistatic performance, a first pressure-sensitive adhesive layer is formed by applying a first coating liquid containing a silicone-based pressure-sensitive adhesive and an antistatic agent. Although the method has been described as an example, the present invention is not limited to such an embodiment. Examples of the single-sided silicone pressure-sensitive adhesive sheet having antistatic performance include the following modes.

　第一の態様としては、基材が帯電防止性を有する基材（帯電防止性基材）である片面シリコーン粘着シートが挙げられる。この第一の態様の変形として、第一の粘着剤層は帯電防止剤を含有していない片面シリコーン粘着シート、又は第一の粘着剤層がさらに帯電防止剤を含有している片面シリコーン粘着シートが挙げられる。第一の態様及び第一の態様の変形において、第一の剥離フィルムは帯電防止性を有していてもよいし、帯電防止性を有していなくてもよい。
　帯電防止剤を含有していない粘着剤層を形成する方法としては、例えば、帯電防止剤を含有していない塗工液を調製して、この塗工液を基材に塗布して乾燥させる方法が挙げられる。 As a 1st aspect, the single-sided silicone adhesive sheet whose base material is a base material (antistatic base material) which has antistatic property is mentioned. As a modification of this first embodiment, the first pressure-sensitive adhesive layer does not contain an antistatic agent, or the single-sided silicone pressure-sensitive adhesive sheet further contains an antistatic agent. Is mentioned. In the first embodiment and the modification of the first embodiment, the first release film may have antistatic properties or may not have antistatic properties.
As a method for forming a pressure-sensitive adhesive layer not containing an antistatic agent, for example, a method of preparing a coating solution that does not contain an antistatic agent, applying the coating solution to a substrate, and drying the coating solution Is mentioned.

　第二の態様としては、基材の第一の基材面及び反対側の第二の基材面の少なくともいずれかの面に帯電防止層を有する片面シリコーン粘着シートが挙げられる。第一の基材面に帯電防止層が形成されている場合、第一の粘着剤層は、当該帯電防止層の上に形成される。第二の基材面に帯電防止層が形成されている場合、第一の粘着剤層は、第一の基材面に形成され、第二の粘着剤層が、当該帯電防止層の上に形成される。第二の態様の変形として、第一の粘着剤層は帯電防止剤を含有していない片面シリコーン粘着シート、又は第一の粘着剤層がさらに帯電防止剤を含有している片面シリコーン粘着シートが挙げられる。
　第二の態様及び第二の態様の変形において、基材は、帯電防止性を有していてもよいし、帯電防止性を有していなくてもよい。また、第二の態様及び第二の態様の変形において、第一の剥離フィルムは帯電防止性を有していてもよいし、帯電防止性を有していなくてもよい。 As a 2nd aspect, the single-sided silicone adhesive sheet which has an antistatic layer in at least any one surface of the 1st base material surface of a base material and the 2nd base material surface on the opposite side is mentioned. When the antistatic layer is formed on the first substrate surface, the first pressure-sensitive adhesive layer is formed on the antistatic layer. When the antistatic layer is formed on the second base material surface, the first pressure-sensitive adhesive layer is formed on the first base material surface, and the second pressure-sensitive adhesive layer is formed on the antistatic layer. It is formed. As a modification of the second embodiment, the first pressure-sensitive adhesive layer is a single-sided silicone pressure-sensitive adhesive sheet that does not contain an antistatic agent, or the first pressure-sensitive adhesive layer is a single-sided silicone pressure-sensitive adhesive sheet that further contains an antistatic agent. Can be mentioned.
In the modification of the second embodiment and the second embodiment, the substrate may have antistatic properties or may not have antistatic properties. Moreover, in the modification of the second aspect and the second aspect, the first release film may have antistatic properties or may not have antistatic properties.

　第三の態様としては、第一の粘着剤層に、帯電防止性を有する第一の剥離フィルムが積層された片面シリコーン粘着シートが挙げられる。帯電防止性を有する第一の剥離フィルムとしては、前記実施形態で説明した剥離フィルムのように剥離基材と剥離剤層とを備える剥離フィルムであって、剥離基材及び剥離剤層の少なくともいずれかが帯電防止性を有する剥離フィルムであることが好ましい。剥離剤層が帯電防止性を有する場合としては、例えば、剥離剤層に帯電防止剤が添加されている場合が挙げられる。第三の態様の変形として、第一の粘着剤層が帯電防止剤を含有していない片面シリコーン粘着シート、又は第一の粘着剤層がさらに帯電防止剤を含有している片面シリコーン粘着シートが挙げられる。第三の態様及び第三の態様の変形において、基材は、帯電防止性を有していてもよいし、帯電防止性を有していなくてもよい。 As a third aspect, there is a single-sided silicone pressure-sensitive adhesive sheet in which a first release film having antistatic properties is laminated on the first pressure-sensitive adhesive layer. The first release film having antistatic properties is a release film comprising a release substrate and a release agent layer as in the release film described in the embodiment, and at least any of the release substrate and the release agent layer. Is preferably a release film having antistatic properties. Examples of the case where the release agent layer has antistatic properties include a case where an antistatic agent is added to the release agent layer. As a modification of the third aspect, there is a single-sided silicone pressure-sensitive adhesive sheet in which the first pressure-sensitive adhesive layer does not contain an antistatic agent, or a single-sided silicone pressure-sensitive adhesive sheet in which the first pressure-sensitive adhesive layer further contains an antistatic agent. Can be mentioned. In the modification of the third aspect and the third aspect, the substrate may have antistatic properties or may not have antistatic properties.

　第四の態様としては、第一の粘着剤層に含まれるシリコーン系粘着剤が帯電防止性を有する場合の片面シリコーン粘着シートが挙げられる。第四の態様の場合、第一の粘着剤層が帯電防止剤を含有していなくても、第一の粘着剤層が帯電防止性能を有する。帯電防止性を有するシリコーン系粘着剤としては、イオン性基を有する付加反応型シリコーン系粘着剤が挙げられる。第四の態様において、基材は、帯電防止性を有していてもよいし、帯電防止性を有していなくてもよい。第四の態様において、第一の剥離フィルムは帯電防止性を有していてもよいし、帯電防止性を有していなくてもよい。 As a fourth aspect, there is a single-sided silicone pressure-sensitive adhesive sheet when the silicone-based pressure-sensitive adhesive contained in the first pressure-sensitive adhesive layer has antistatic properties. In the case of the fourth aspect, even if the first pressure-sensitive adhesive layer does not contain an antistatic agent, the first pressure-sensitive adhesive layer has antistatic performance. Examples of the silicone pressure-sensitive adhesive having antistatic properties include addition reaction type silicone pressure-sensitive adhesives having an ionic group. In the fourth aspect, the substrate may have antistatic properties or may not have antistatic properties. In the fourth aspect, the first release film may have antistatic properties or may not have antistatic properties.

〔粘着剤組成物の調製〕 (Preparation of pressure-sensitive adhesive composition)

（１）粘着剤組成物Ａ
　付加反応型シリコーン系粘着剤（東レ・ダウコーニング（株）製、製品名：ＳＤ４５７０ＰＳＡ、固形分６０質量％、シリコーンレジン含有率６０質量％であり、架橋剤を含有する付加反応型シリコーン）１００質量部、白金触媒（東レ・ダウコーニング（株）製、製品名：ＳＲＸ－２１２、固形分１００質量％）０．９質量部、及び帯電防止剤であるリチウム（Ｌｉ）塩を溶解させたシリコーンオイル（丸菱油化工業（株）製、ＰＣ－３４６２、固形分６２質量％）２０質量部を加えて粘着剤組成物Ａを調製し、この粘着剤組成物Ａをトルエンで希釈して固形分濃度が２５質量％の塗工液ＡＬを調製した。 (1) Adhesive composition A
Addition reaction type silicone adhesive (manufactured by Toray Dow Corning Co., Ltd., product name: SD4570PSA, solid content 60% by mass, silicone resin content 60% by mass, addition reaction type silicone containing crosslinking agent) 100 mass Part, platinum catalyst (manufactured by Dow Corning Toray Co., Ltd., product name: SRX-212, solid content: 100% by mass), 0.9 parts by mass, and a silicone oil in which a lithium (Li) salt as an antistatic agent is dissolved (Adhesive composition A was prepared by adding 20 parts by weight (manufactured by Maruhishi Oil Chemical Co., Ltd., PC-3462, solid content 62% by mass), and this adhesive composition A was diluted with toluene to obtain a solid content. A coating liquid AL having a concentration of 25% by mass was prepared.

（２）粘着剤組成物Ｂ
　粘着剤組成物Ａに含まれる帯電防止剤をイオン性基含有シリコーンオリゴマー（信越化学工業（株）製、Ｘ－４０－２７５０、固形分１００質量％）に変更し、添加量を６質量部になるように調製したこと以外は、粘着剤組成物Ａと同様にして粘着剤組成物Ｂを調製した。この粘着剤組成物Ｂをトルエンで希釈して固形分濃度が２５質量％の塗工液ＢＬを調製した。 (2) Adhesive composition B
The antistatic agent contained in the pressure-sensitive adhesive composition A was changed to an ionic group-containing silicone oligomer (manufactured by Shin-Etsu Chemical Co., Ltd., X-40-2750, solid content: 100% by mass), and the addition amount was changed to 6 parts by mass. A pressure-sensitive adhesive composition B was prepared in the same manner as the pressure-sensitive adhesive composition A, except that it was prepared as described above. The pressure-sensitive adhesive composition B was diluted with toluene to prepare a coating liquid BL having a solid content concentration of 25% by mass.

（３）粘着剤組成物Ｃ
　粘着剤組成物Ａに含まれる帯電防止剤を含まないこと以外は、粘着剤組成物Ａと同様にして粘着剤組成物Ｃを調製した。この粘着剤組成物Ｃをトルエンで希釈して固形分濃度が２５質量％の塗工液ＣＬを調製した。 (3) Adhesive composition C
A pressure-sensitive adhesive composition C was prepared in the same manner as the pressure-sensitive adhesive composition A except that the anti-static agent contained in the pressure-sensitive adhesive composition A was not included. The pressure-sensitive adhesive composition C was diluted with toluene to prepare a coating liquid CL having a solid concentration of 25% by mass.

〔両面シリコーン粘着シートの作製〕 [Production of double-sided silicone adhesive sheet]

（実施例１）
　基材であるポリイミドフィルム（東レ・デュポン（株）製、カプトン１００Ｈ、厚み２５μｍ）の第一の基材面に対して、調製した塗工液ＡＬを、乾燥後の厚みが２０μｍとなるようにコンマコーター（登録商標）を用いて塗布し、乾燥炉に通じ、風速５ｍ／ｓｅｃ、乾燥温度１２０℃、乾燥時間６０秒間で乾燥し、さらに、フッ素系剥離層を設けた３８μｍのポリエチレンテレフタレートフィルムからなる剥離フィルム〔リンテック（株）製；ＳＰ－ＰＥＴ３８ＹＳＤ〕の剥離層面側を積層し、基材／第一の粘着剤層／第一の剥離フィルムの構成の片面シリコーン粘着シートを作製した。この片面シリコーン粘着シートをロール状に巻き取った。また、この片面シリコーン粘着シートを用いて後述の帯電防止性能の評価を行った。
　次いで、得られた片面シリコーン粘着シートの巻取体から片面シリコーン粘着シートを繰り出し、基材の第二の基材面に、調製した塗工液ＣＬを、コンマコーター（登録商標）を用いて乾燥後の厚みが２０μｍとなるように塗布し、乾燥炉に通じ、風速５ｍ／ｓｅｃ、乾燥温度１２０℃、乾燥時間６０秒間で乾燥し、さらに、フッ素系剥離層を設けた３８μｍのポリエチレンテレフタレートフィルムからなる剥離フィルム〔リンテック（株）製；ＳＰ－ＰＥＴ３８ＹＳＤ〕の剥離層面側を積層し、ロール状に巻き取り、第二の剥離フィルム／第二の粘着剤層／基材／第一の粘着剤層／第一の剥離フィルムの構成の両面シリコーン粘着シートを作製した。 Example 1
With respect to the first base material surface of the polyimide film (manufactured by Toray DuPont Co., Ltd., Kapton 100H, thickness 25 μm) as the base material, the prepared coating liquid AL is so dried that the thickness after drying becomes 20 μm. Application using a comma coater (registered trademark), passing through a drying oven, drying at a wind speed of 5 m / sec, a drying temperature of 120 ° C. and a drying time of 60 seconds, and further from a 38 μm polyethylene terephthalate film provided with a fluorine-based release layer The release layer surface side of the release film [manufactured by Lintec Co., Ltd .; SP-PET38YSD] was laminated to prepare a single-sided silicone adhesive sheet having a structure of base material / first adhesive layer / first release film. This single-sided silicone pressure-sensitive adhesive sheet was wound up into a roll. Moreover, the antistatic performance mentioned later was evaluated using this single-sided silicone adhesive sheet.
Next, the single-sided silicone pressure-sensitive adhesive sheet is fed out from the wound body of the obtained single-sided silicone pressure-sensitive adhesive sheet, and the prepared coating liquid CL is dried on the second base material surface of the base material using a comma coater (registered trademark). It was applied so that the subsequent thickness was 20 μm, passed through a drying furnace, dried at a wind speed of 5 m / sec, a drying temperature of 120 ° C. and a drying time of 60 seconds, and further from a 38 μm polyethylene terephthalate film provided with a fluorine-based release layer. The release layer surface side of the release film [manufactured by Lintec Corporation; SP-PET38YSD] is laminated, wound up into a roll, and the second release film / second adhesive layer / base material / first adhesive layer / A double-sided silicone pressure-sensitive adhesive sheet having the configuration of the first release film was prepared.

（実施例２）
　実施例２の片面シリコーン粘着シート及び両面シリコーン粘着シートは、実施例１における塗工液ＡＬを塗工液ＢＬに変更したこと以外は、実施例１と同様にして作製した。この片面シリコーン粘着シートを用いて後述の帯電防止性能の評価を行った。 (Example 2)
The single-sided silicone pressure-sensitive adhesive sheet and double-sided silicone pressure-sensitive adhesive sheet of Example 2 were produced in the same manner as in Example 1 except that the coating liquid AL in Example 1 was changed to the coating liquid BL. Using this single-sided silicone pressure-sensitive adhesive sheet, the antistatic performance described later was evaluated.

（比較例１）
　比較例１は、実施例１における塗工液ＡＬを塗工液ＣＬに変更したこと以外は、実施例１と同様にして片面シリコーン粘着シートを作製した。この片面シリコーン粘着シートの巻取体を繰り出す工程において静電気が発生したため、発火の虞があると判断し、その後の工程を中止した。後述の帯電防止性能の評価は、片面シリコーン粘着シートについて行った。 (Comparative Example 1)
In Comparative Example 1, a single-sided silicone pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that the coating liquid AL in Example 1 was changed to the coating liquid CL. Since static electricity was generated in the process of drawing out the wound body of the single-sided silicone pressure-sensitive adhesive sheet, it was determined that there was a possibility of ignition, and the subsequent processes were stopped. The evaluation of the antistatic performance described later was performed on a single-sided silicone pressure-sensitive adhesive sheet.

〔帯電防止性能の評価〕
　片面シリコーン粘着シートの帯電量は、以下に示す方法によって測定した。
　各実施例及び比較例において、得られたロール状の前記片面シリコーン粘着シートから、Ａ４サイズの試験片を、複数、作製した。複数の試験片を重ねて積層体を作製した。積層体を静置し、その後、積層体の最表層から一枚の試験片を取り出し、積層体から試験片を取り出してから６０秒経過後の一枚の試験片の帯電量を測定した。帯電量をデジタル静電電位測定器（春日電機（株）製、ＫＳＤ－０１０８）によって測定した。なお、Ａ４サイズとは、縦２１０ｍｍ、横２９７ｍｍの大きさであることをいう。 [Evaluation of antistatic performance]
The charge amount of the single-sided silicone pressure-sensitive adhesive sheet was measured by the following method.
In each Example and Comparative Example, a plurality of A4 size test pieces were produced from the obtained roll-shaped single-sided silicone pressure-sensitive adhesive sheet. A plurality of test pieces were stacked to produce a laminate. The laminate was allowed to stand, and then one test piece was taken out from the outermost layer of the laminate, and the charge amount of one test piece after 60 seconds from the removal of the test piece from the laminate was measured. The charge amount was measured by a digital electrostatic potential measuring device (KSD-0108, manufactured by Kasuga Denki Co., Ltd.). The A4 size means that the size is 210 mm long and 297 mm wide.

　表１に、実施例１、実施例２、及び比較例１に係る試験片に関する前述の帯電防止性能の評価結果を示す。表１中の帯電防止剤の含有量は、粘着物組成物の全固形分中の含有量である。 Table 1 shows the evaluation results of the above-described antistatic performance with respect to the test pieces according to Example 1, Example 2, and Comparative Example 1. The content of the antistatic agent in Table 1 is the content in the total solid content of the pressure-sensitive adhesive composition.

Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001

　第一の粘着剤層に帯電防止剤を含む実施例に係る片面シリコーン粘着シートは、帯電量が小さく、直塗り法で両面シリコーン粘着シートを製造する工程において、片面シリコーン粘着シートの繰り出し時に、片面シリコーン粘着シートの静電気によりシリコーン系粘着剤の塗工液の有機溶媒が発火する虞がなく、両面シリコーン粘着シートを安全に製造できる。 The single-sided silicone pressure-sensitive adhesive sheet according to the example containing the antistatic agent in the first pressure-sensitive adhesive layer has a small charge amount, and in the step of producing the double-sided silicone pressure-sensitive adhesive sheet by the direct coating method, There is no risk of the organic solvent in the silicone-based adhesive coating liquid being ignited by static electricity of the silicone adhesive sheet, and a double-sided silicone adhesive sheet can be produced safely.

　１…両面シリコーン粘着シート、１１…基材、１１ａ…第一の基材面、１１ｂ…第二の基材面、２１…第一の粘着剤層、２２…第二の粘着剤層、３１…第一の剥離フィルム、３２…第二の剥離フィルム、３３…両面剥離フィルム。 DESCRIPTION OF SYMBOLS 1 ... Double-sided silicone adhesive sheet, 11 ... Base material, 11a ... 1st base material surface, 11b ... 2nd base material surface, 21 ... 1st adhesive layer, 22 ... 2nd adhesive layer, 31 ... 1st peeling film, 32 ... 2nd peeling film, 33 ... Double-sided peeling film.

Claims (15)

　基材の第一の基材面に、シリコーン系粘着剤を含有する第一の塗工液を塗布して第一の粘着剤層を形成する工程と、
　前記第一の粘着剤層に第一の剥離フィルムを積層し、帯電防止性能を有する片面シリコーン粘着シートを得る工程と、
　前記片面シリコーン粘着シートをロール状に巻き取る工程と、
　ロール状に巻き取られた前記片面シリコーン粘着シートを繰り出す工程と、
　前記基材の前記第一の基材面とは反対側の第二の基材面に、シリコーン系粘着剤を含有する第二の塗工液を塗布して第二の粘着剤層を形成する工程と、
　前記第二の粘着剤層に第二の剥離フィルムを積層し、ロール状に巻き取る工程と、を有する、両面シリコーン粘着シートの製造方法。 A step of applying a first coating liquid containing a silicone-based pressure-sensitive adhesive to the first base material surface of the base material to form a first pressure-sensitive adhesive layer;
Laminating the first release film on the first pressure-sensitive adhesive layer, and obtaining a single-sided silicone pressure-sensitive adhesive sheet having antistatic performance;
Winding the single-sided silicone pressure-sensitive adhesive sheet into a roll,
A step of feeding out the one-sided silicone pressure-sensitive adhesive sheet wound up in a roll;
A second pressure-sensitive adhesive layer is formed by applying a second coating liquid containing a silicone-based pressure-sensitive adhesive to the second base material surface opposite to the first base material surface of the base material. Process,
A method for producing a double-sided silicone pressure-sensitive adhesive sheet, comprising: laminating a second release film on the second pressure-sensitive adhesive layer and winding the film into a roll. 　請求項１に記載の両面シリコーン粘着シートの製造方法において、
　前記第一の塗工液は、帯電防止剤を含有する、両面シリコーン粘着シートの製造方法。 In the manufacturing method of the double-sided silicone adhesive sheet of Claim 1,
The method for producing a double-sided silicone pressure-sensitive adhesive sheet, wherein the first coating liquid contains an antistatic agent. 　請求項２に記載の両面シリコーン粘着シートの製造方法において、
　前記第一の塗工液が含有する前記帯電防止剤は、イオン導電性シリコーン系化合物である、両面シリコーン粘着シートの製造方法。 In the manufacturing method of the double-sided silicone adhesive sheet of Claim 2,
The method for producing a double-sided silicone pressure-sensitive adhesive sheet, wherein the antistatic agent contained in the first coating liquid is an ion conductive silicone compound. 　請求項２に記載の両面シリコーン粘着シートの製造方法において、
　前記第一の塗工液が含有する前記帯電防止剤は、イオン性基含有シリコーンオリゴマー、あるいはアルカリ金属塩を溶解させたシリコーンオイルである、両面シリコーン粘着シートの製造方法。 In the manufacturing method of the double-sided silicone adhesive sheet of Claim 2,
The method for producing a double-sided silicone pressure-sensitive adhesive sheet, wherein the antistatic agent contained in the first coating liquid is an ionic group-containing silicone oligomer or a silicone oil in which an alkali metal salt is dissolved. 　請求項１から請求項４のいずれか一項に記載の両面シリコーン粘着シートの製造方法において、
　前記第二の塗工液は、帯電防止剤を含有する、両面シリコーン粘着シートの製造方法。 In the manufacturing method of the double-sided silicone adhesive sheet as described in any one of Claims 1-4,
The method for producing a double-sided silicone pressure-sensitive adhesive sheet, wherein the second coating liquid contains an antistatic agent. 　請求項１から請求項５のいずれか一項に記載の両面シリコーン粘着シートの製造方法において、
　前記基材は、長尺状である、両面シリコーン粘着シートの製造方法。 In the manufacturing method of the double-sided silicone adhesive sheet as described in any one of Claims 1-5,
The said base material is a manufacturing method of the double-sided silicone adhesive sheet which is elongate. 　請求項１から請求項６のいずれか一項に記載の両面シリコーン粘着シートの製造方法において、
　前記基材は、ポリイミドフィルムである、両面シリコーン粘着シートの製造方法。 In the manufacturing method of the double-sided silicone adhesive sheet as described in any one of Claims 1-6,
The said base material is a manufacturing method of the double-sided silicone adhesive sheet which is a polyimide film. 　請求項１から請求項７のいずれか一項に記載の両面シリコーン粘着シートの製造方法において、
　ロール状の前記片面シリコーン粘着シートから、Ａ４サイズの試験片を、複数、作製し、複数の前記試験片を重ねて積層体を作製し、前記積層体の最表層から一枚の前記試験片を取り出し、前記積層体から一枚の前記試験片を取り出してから６０秒経過後の一枚の前記試験片の帯電量が１０ｋＶ以下である、両面シリコーン粘着シートの製造方法。 In the manufacturing method of the double-sided silicone adhesive sheet as described in any one of Claims 1-7,
A plurality of A4 size test pieces are prepared from the roll-like single-sided silicone pressure-sensitive adhesive sheet, and a plurality of the test pieces are stacked to prepare a laminate, and one test piece is prepared from the outermost layer of the laminate. The method for producing a double-sided silicone pressure-sensitive adhesive sheet, wherein the charge amount of the single test piece after 10 seconds from the removal and removal of the single test piece from the laminate is 10 kV or less. 　第一の基材面と前記第一の基材面とは反対側の第二の基材面とを有する基材と、
　前記第一の基材面に設けられた第一の粘着剤層と、
　前記第一の粘着剤層に積層された第一の剥離フィルムと、
　前記第二の基材面に設けられた第二の粘着剤層と、
　前記第二の粘着剤層に積層された第二の剥離フィルムと、を備え、
　前記第一の粘着剤層及び前記第二の粘着剤層は、シリコーン系粘着剤を含有し、
　前記第一の粘着剤層は、帯電防止性能を有する、
　両面シリコーン粘着シート。 A substrate having a first substrate surface and a second substrate surface opposite to the first substrate surface;
A first pressure-sensitive adhesive layer provided on the first substrate surface;
A first release film laminated to the first pressure-sensitive adhesive layer;
A second pressure-sensitive adhesive layer provided on the second substrate surface;
A second release film laminated on the second pressure-sensitive adhesive layer,
The first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer contain a silicone-based pressure-sensitive adhesive,
The first pressure-sensitive adhesive layer has antistatic performance,
Double-sided silicone adhesive sheet. 　請求項９に記載の両面シリコーン粘着シートにおいて、
　前記基材は、長尺状である、両面シリコーン粘着シート。 In the double-sided silicone pressure-sensitive adhesive sheet according to claim 9,
The said base material is a double-sided silicone adhesive sheet which is elongate. 　請求項９又は請求項１０に記載の両面シリコーン粘着シートにおいて、
　前記基材は、ポリイミドフィルムである、両面シリコーン粘着シート。 In the double-sided silicone pressure-sensitive adhesive sheet according to claim 9 or 10,
The double-sided silicone adhesive sheet, wherein the substrate is a polyimide film. 　請求項９から請求項１１のいずれか一項に記載の両面シリコーン粘着シートにおいて、
　前記第一の粘着剤層は、帯電防止剤を含有する、両面シリコーン粘着シート。 In the double-sided silicone pressure-sensitive adhesive sheet according to any one of claims 9 to 11,
The first pressure-sensitive adhesive layer is a double-sided silicone pressure-sensitive adhesive sheet containing an antistatic agent. 　請求項１２に記載の両面シリコーン粘着シートにおいて、
　前記第一の粘着剤層が含有する前記帯電防止剤は、イオン導電性シリコーン系化合物である、両面シリコーン粘着シート。 In the double-sided silicone pressure-sensitive adhesive sheet according to claim 12,
The double-sided silicone pressure-sensitive adhesive sheet, wherein the antistatic agent contained in the first pressure-sensitive adhesive layer is an ion conductive silicone compound. 　請求項１２に記載の両面シリコーン粘着シートにおいて、
　前記第一の粘着剤層が含有する前記帯電防止剤は、イオン性基含有シリコーンオリゴマー、あるいはアルカリ金属塩を溶解させたシリコーンオイルである、両面シリコーン粘着シート。 In the double-sided silicone pressure-sensitive adhesive sheet according to claim 12,
The antistatic agent contained in the first pressure-sensitive adhesive layer is a double-sided silicone pressure-sensitive adhesive sheet, which is a silicone oil in which an ionic group-containing silicone oligomer or an alkali metal salt is dissolved. 　請求項９から請求項１４のいずれか一項に記載の両面シリコーン粘着シートにおいて、
　前記第二の粘着剤層は、帯電防止剤を含有する、両面シリコーン粘着シート。 In the double-sided silicone pressure-sensitive adhesive sheet according to any one of claims 9 to 14,
The second pressure-sensitive adhesive layer is a double-sided silicone pressure-sensitive adhesive sheet containing an antistatic agent.
PCT/JP2017/038233 2016-11-24 2017-10-24 Double-sided silicone adhesive sheet and production method for double-sided silicone adhesive sheet Ceased WO2018096858A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2018552473A JP6517451B2 (en) 2016-11-24 2017-10-24 Method for producing double-sided silicone adhesive sheet
CN201780049847.0A CN109642128A (en) 2016-11-24 2017-10-24 Double-sided silicone adhesive sheet and manufacturing method of double-sided silicone adhesive sheet
KR1020197002938A KR20190086429A (en) 2016-11-24 2017-10-24 METHOD FOR MANUFACTURING BOTTLE SILICON ADHESIVE SHEET

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-227940 2016-11-24
JP2016227940 2016-11-24

Publications (1)

Publication Number Publication Date
WO2018096858A1 true WO2018096858A1 (en) 2018-05-31

Family

ID=62195839

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/038233 Ceased WO2018096858A1 (en) 2016-11-24 2017-10-24 Double-sided silicone adhesive sheet and production method for double-sided silicone adhesive sheet

Country Status (5)

Country Link
JP (1) JP6517451B2 (en)
KR (1) KR20190086429A (en)
CN (1) CN109642128A (en)
TW (1) TW201829689A (en)
WO (1) WO2018096858A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108859380A (en) * 2018-06-27 2018-11-23 振德医疗用品股份有限公司 Double spread system
JP2020003675A (en) * 2018-06-28 2020-01-09 日東電工株式会社 Adhesive composition, surface protection film, and optical film
WO2020261775A1 (en) * 2019-06-28 2020-12-30 日東電工株式会社 Multilayer body
KR102394263B1 (en) * 2020-12-08 2022-05-03 표진환 the both sides sticking sheet with release paper differently coated both sides and the manufacturing method thereof
WO2022131306A1 (en) * 2020-12-18 2022-06-23 日東電工株式会社 Double-sided adhesive sheet for transfer
JP2022529808A (en) * 2019-04-22 2022-06-24 サムスン エスディアイ カンパニー，リミテッド Silicon-based adhesive protective film and optical members including it
JP2022183681A (en) * 2021-05-31 2022-12-13 日東電工株式会社 Double-sided adhesive sheet for transfer
US12404424B2 (en) 2019-04-25 2025-09-02 Samsung Sdi Co., Ltd. Silicone-based adhesive protection film and optical member comprising same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112194995A (en) * 2020-09-15 2021-01-08 苏州桐力光电股份有限公司 Low-dielectric-constant OCA optical material and preparation method thereof
CN119471867B (en) * 2024-12-26 2025-06-27 黄河源股份公司 OCA optical film and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007081881A (en) * 2005-09-14 2007-03-29 Nitto Denko Corp Sound-permeable membrane, electronic component with sound-permeable membrane, and method for manufacturing circuit board mounted with the electronic component
JP2009030028A (en) * 2007-07-04 2009-02-12 Shin Etsu Chem Co Ltd Silicone pressure-sensitive adhesive composition having antistatic properties and silicone pressure-sensitive adhesive tape
JP2011119427A (en) * 2009-12-03 2011-06-16 Shin-Etsu Chemical Co Ltd Method of manufacturing stacked semiconductor integrated device
JP2013245236A (en) * 2012-05-23 2013-12-09 Shin-Etsu Chemical Co Ltd Silicone rubber composition

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4553553B2 (en) 2003-01-21 2010-09-29 リンテック株式会社 Adhesive tape for electronic devices
CN100347261C (en) * 2005-10-13 2007-11-07 岑建军 Production and apparatus for polyimide-fluorine 46 adhesive tape
KR20080004021A (en) * 2006-07-04 2008-01-09 쓰리엠 이노베이티브 프로퍼티즈 캄파니 Conductive adhesive tape with different adhesive strength on both sides and its manufacturing method
CN101319127B (en) * 2008-07-02 2012-05-30 深圳市顶壹胶粘制品有限公司 Method of preparing multiple-unit cutting-free two-faced adhesive tape
CN101983865A (en) * 2010-08-31 2011-03-09 东莞市挚爱内衣有限公司 A production process based on hot melt adhesive non-woven composite
JP2012151360A (en) 2011-01-20 2012-08-09 Nitto Denko Corp Heat-resistant adhesive tape for semiconductor package manufacturing process
JP2013147540A (en) 2012-01-17 2013-08-01 Nitto Denko Corp Adhesive tape for protecting surface of semiconductor component
JP5977582B2 (en) * 2012-05-25 2016-08-24 藤森工業株式会社 Surface protective film and optical component on which it is bonded
CN202705291U (en) * 2012-07-16 2013-01-30 苏州斯迪克新材料科技股份有限公司 Easy-to-strip double-sided adhesive tape
CN203513552U (en) * 2013-09-05 2014-04-02 上海精涂新材料技术有限公司 PET (Polyethylene Terephthalate) double-faced antistatic protective film
WO2015151223A1 (en) * 2014-03-31 2015-10-08 リンテック株式会社 Double-sided adhesive sheet and double-sided adhesive sheet manufacturing method
CN105017987A (en) * 2015-07-28 2015-11-04 太湖金张科技股份有限公司 Optical double-faced adhesive tape
CN205328924U (en) * 2016-01-05 2016-06-22 苏州广尔纳新材料科技股份有限公司 Two -sidedly prevent high temperature resistant polyimide sticky tape of static
CN205398534U (en) * 2016-02-22 2016-07-27 浙江欧仁新材料有限公司 Antistatic double -faced adhesive film material
CN205710567U (en) * 2016-06-23 2016-11-23 苏州英诺复合材料有限公司 High intensity cloth base adhesive tape

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007081881A (en) * 2005-09-14 2007-03-29 Nitto Denko Corp Sound-permeable membrane, electronic component with sound-permeable membrane, and method for manufacturing circuit board mounted with the electronic component
JP2009030028A (en) * 2007-07-04 2009-02-12 Shin Etsu Chem Co Ltd Silicone pressure-sensitive adhesive composition having antistatic properties and silicone pressure-sensitive adhesive tape
JP2011119427A (en) * 2009-12-03 2011-06-16 Shin-Etsu Chemical Co Ltd Method of manufacturing stacked semiconductor integrated device
JP2013245236A (en) * 2012-05-23 2013-12-09 Shin-Etsu Chemical Co Ltd Silicone rubber composition

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108859380A (en) * 2018-06-27 2018-11-23 振德医疗用品股份有限公司 Double spread system
CN108859380B (en) * 2018-06-27 2024-04-26 振德医疗用品股份有限公司 Double-sided coating system
JP2020003675A (en) * 2018-06-28 2020-01-09 日東電工株式会社 Adhesive composition, surface protection film, and optical film
JP7465283B2 (en) 2019-04-22 2024-04-10 サムスン エスディアイ カンパニー，リミテッド Silicone-based adhesive protective film and optical member including same
JP2022529808A (en) * 2019-04-22 2022-06-24 サムスン エスディアイ カンパニー，リミテッド Silicon-based adhesive protective film and optical members including it
US20220206190A1 (en) * 2019-04-22 2022-06-30 Samsung Sdi Co., Ltd. Silicone-based adhesive protection film and optical member comprising same
US12404424B2 (en) 2019-04-25 2025-09-02 Samsung Sdi Co., Ltd. Silicone-based adhesive protection film and optical member comprising same
KR20220027076A (en) * 2019-06-28 2022-03-07 닛토덴코 가부시키가이샤 laminate
JP7072122B2 (en) 2019-06-28 2022-05-19 日東電工株式会社 Laminate
KR102501547B1 (en) 2019-06-28 2023-02-21 닛토덴코 가부시키가이샤 laminate
JPWO2020261775A1 (en) * 2019-06-28 2020-12-30
WO2020261775A1 (en) * 2019-06-28 2020-12-30 日東電工株式会社 Multilayer body
KR102394263B1 (en) * 2020-12-08 2022-05-03 표진환 the both sides sticking sheet with release paper differently coated both sides and the manufacturing method thereof
WO2022131306A1 (en) * 2020-12-18 2022-06-23 日東電工株式会社 Double-sided adhesive sheet for transfer
JP2022183681A (en) * 2021-05-31 2022-12-13 日東電工株式会社 Double-sided adhesive sheet for transfer
JP7719630B2 (en) 2021-05-31 2025-08-06 日東電工株式会社 Double-sided adhesive sheet for transfer

Also Published As

Publication number Publication date
TW201829689A (en) 2018-08-16
JPWO2018096858A1 (en) 2019-03-22
JP6517451B2 (en) 2019-05-22
CN109642128A (en) 2019-04-16
KR20190086429A (en) 2019-07-22

Similar Documents

Publication Publication Date Title
JP6517451B2 (en) Method for producing double-sided silicone adhesive sheet
TWI479513B (en) Surface protective film for transparent conductive film and transparent conductive film using the same
CN101220246B (en) Heat-activated adhesive sheet
JP7304143B2 (en) Adhesive sheet and adhesive sheet laminate
JP6454587B2 (en) Method for producing graphite sheet laminate, method for producing individualized product of graphite sheet laminate, method for producing individualized product sealed adhesive sheet of graphite sheet laminate, and method of producing individual product of graphite sheet laminated product sealed adhesive sheet Method
WO2006134647A1 (en) Armor label for battery
TWI749111B (en) Double-sided adhesive sheet and manufacturing method of semiconductor device
JP2015071727A (en) Adhesive film for processing graphite sheet, and heat radiation sheet product on which the adhesive film is adhered
KR101341405B1 (en) Inorganic sealing film-attached adhesive tape, and method for transferring inorganic sealing film
CN103764513A (en) Heat-sealing cover film for packaging electronic components
KR102358296B1 (en) Adhesive sheet for battery and lithium-ion battery
JP2011236370A (en) Multilayer adhesive sheet and method for producing the same
JP7300052B2 (en) Cover tape for paper carrier tape, package for transporting electronic parts, and package for electronic parts
JP2019199561A (en) Adhesive sheet
TW422784B (en) Mounting composite film
JP2017013801A (en) Cover tape for packaging electronic parts
CN114231206A (en) Adhesive tape and method of making the same
JP4914241B2 (en) Release sheet and adhesive
JP2016190326A (en) Release sheet and adhesive sheet
CN104231960A (en) Thermal spray masking tape
JP5592924B2 (en) Protective film for FPC
JP2017101095A (en) Removable heat-resistant adsorption sheet
JP7439453B2 (en) adhesive sheet
JP2010201836A (en) Double-sided mold release film for tape paste
JP2019052266A (en) Double-sided adhesive tape

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2018552473

Country of ref document: JP

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 20197002938

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17874130

Country of ref document: EP

Kind code of ref document: A1