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WO2016063669A1 - Rouleau de plaque polarisante - Google Patents

Rouleau de plaque polarisante Download PDF

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Publication number
WO2016063669A1
WO2016063669A1 PCT/JP2015/076642 JP2015076642W WO2016063669A1 WO 2016063669 A1 WO2016063669 A1 WO 2016063669A1 JP 2015076642 W JP2015076642 W JP 2015076642W WO 2016063669 A1 WO2016063669 A1 WO 2016063669A1
Authority
WO
WIPO (PCT)
Prior art keywords
polarizing plate
core
convex portion
protective film
polarizer
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/JP2015/076642
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English (en)
Japanese (ja)
Inventor
裕一 塩田
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.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical Co Ltd
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 Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to KR1020177013495A priority Critical patent/KR102281566B1/ko
Priority to CN201580055963.4A priority patent/CN107076913B/zh
Publication of WO2016063669A1 publication Critical patent/WO2016063669A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • 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
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/04—Kinds or types
    • B65H75/08—Kinds or types of circular or polygonal cross-section
    • B65H75/10—Kinds or types of circular or polygonal cross-section without flanges, e.g. cop tubes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering

Definitions

  • the present invention relates to a polarizing plate roll formed by winding a long polarizing plate around a winding core.
  • the polarizing plate has been widely used in display devices such as liquid crystal display devices, especially in recent years for various mobile devices such as smartphones.
  • As a polarizing plate one having a configuration in which a protective film is bonded to one side or both sides of a polarizer is common, but with the development to mobile devices, the polarizer and protective film constituting the polarizing plate are made thinner. It is increasingly demanded.
  • the polarizing plate is manufactured by using a long (band-shaped) raw material film and processing the unwound raw material film while unwinding the raw material film from a roll in which the raw material film is wound around a winding core (winding core). It is common to use a so-called roll-to-roll method in which a long (band-like) polarizing plate is used, and the obtained polarizing plate is wound around a core to make a roll. Accordingly, the polarizing plate is usually obtained as a polarizing plate roll obtained by winding a long polarizing plate around a core (for example, Japanese Patent Application Laid-Open No. 2013-029754 (Patent Document 1)).
  • the polarizing plate is generally manufactured in the form of a polarizing plate roll.
  • the film length of the polarizing plate is 2000 m and the diameter of the core is 150 mm ⁇ , the number of windings of the polarizing plate reaches about 4000 times.
  • the polarizing plate manufactured as a polarizing plate roll is used for subsequent processes such as further laminating another film or forming a coating layer, or while being transported to a supply destination. It is often held in a roll for a certain continuous period.
  • the polarizing plate unwound after being held in a roll state for a certain continuous period has a problem that it is easily accompanied by a defect called “winding streak defect”. This problem becomes more prominent as the polarizer and the protective film constituting the polarizing plate are thinner.
  • the “winding streak defect” is a difference in height generated between the winding start end of the polarizing plate and the outer periphery of the core, that is, the polarizing plate to be wound is pressed against the stepped portion. Is a streak-like dent defect extending in the width direction of the polarizing plate.
  • winding streak defects are particularly noticeable. As shown in FIG. 7, the winding streak defects are pressed against the corners of the defect K 1 (winding start end of the polarizing plate from a corner portion of the winding start end of the polarizer (short side angle end)
  • a defect K 2 derived from a corner portion of the fixing member is further included.
  • Winding streak defects are strongly generated in the polarizing plate inside the polarizing plate roll (initial polarizing plate at the start of winding), and become weaker toward the outer side of the polarizing plate roll. can occur over m.
  • a polarizing plate containing winding streak defects is applied to an image display device such as a liquid crystal display device, the visibility may be lowered. If the polarizing plate portion having the defect is removed as a defective product, the product of the polarizing plate The yield is greatly reduced.
  • the present invention is a polarizing plate roll formed by winding a polarizing plate around a winding core, and can suppress a “winding streak defect” that can be confirmed when the polarizing plate is unwound from the roll.
  • the purpose is to provide a role.
  • the present invention provides the following polarizing plate roll.
  • a core including a first convex portion and a second convex portion extending in the circumferential direction on the outer peripheral surface, and a polarizing plate wound around the core,
  • the polarizing plate comprises a polarizer and a protective film laminated on at least one surface thereof,
  • the polarizing plate is wound around the core such that one end region in the width direction of the protective film is located on the first convex portion and the other end region is located on the second convex portion.
  • a polarizing roll that is rotated.
  • one end portion in the width direction of the polarizer is positioned on the inner side of the inner end portion of the first convex portion, and the other end portion is an inner end portion of the second convex portion.
  • a polarizing plate roll capable of suppressing winding streak defects. By suppressing the winding streak defect, the product quality and product yield of the polarizing plate can be improved.
  • FIG. 1 It is a schematic diagram which shows an example of the core with a convex part used for the polarizing plate roll which concerns on this invention. It is sectional drawing in the part which has the 1st convex part of the core with a convex part shown by FIG. It is sectional drawing which shows typically an example of the positional relationship regarding the width direction between the convex part of the core with a convex part, and the polarizing plate wound. It is sectional drawing which shows typically another example of the positional relationship regarding the width direction between the convex part of the core with a convex part, and the polarizing plate wound. It is sectional drawing which shows another example of the core with a convex part. It is the schematic which shows a mode that the winding start end part of a polarizing plate is fixed to a core with a convex part using a fixing member. It is the schematic for demonstrating a winding stripe defect.
  • the polarizing plate roll according to the present invention has a convex winding having a first convex portion 10 a and a second convex portion 10 b extending in the circumferential direction as a winding core on the outer peripheral surface.
  • This is a roll-type polarizing plate in which a core 10 is used and a long polarizing plate is wound around the core 10.
  • the polarizing plate in order to suppress the occurrence of the above-mentioned “winding streak defect”, has one end region in the width direction of the protective film constituting the polarizing plate located on the first convex portion 10a and the other.
  • the core 10 with convex part can have the same shape as a conventionally well-known core except having the 1st convex part 10a and the 2nd convex part 10b, These
  • the main body portion of the core excluding the convex portion can be, for example, a columnar shape or a cylindrical shape.
  • the material is not particularly limited, and a metal, an alloy, or a resin (such as a thermoplastic resin) can be used.
  • the length in the width direction (rotation axis direction) of the core 10 with the convex portion is approximately the same as or longer than the width of the polarizing plate to be wound.
  • the diameter may be a general diameter of the core, for example, about 100 to 200 mm ⁇ .
  • the installation position of the 1st convex part 10a and the 2nd convex part 10b provided in the outer peripheral surface of the core 10 with a convex part is dependent on the width
  • the first convex portion 10a and the second convex portion 10b are positions different from each other on the outer peripheral surface, and one end region in the width direction of the protective film constituting the polarizing plate is the first. It is located on the convex portion 10a, and is installed so that the other end region is located on the second convex portion 10b.
  • the 1st convex part 10a and the 2nd convex part 10b are the edge part area
  • the 1st convex part 10a and the 2nd convex part 10b are provided in the outer peripheral surface of the core 10 with a convex part so that it may extend in the circumferential direction of the core 10 with a convex part, Preferably the circumference
  • the first convex portion 10 a and the second convex portion 10 b are preferably strip-shaped, and are provided in an annular shape over the entire circumference or approximately the entire circumference of the outer peripheral surface of the core 10 with the convex portion. It is preferable.
  • the 1st convex part 10a and the 2nd convex part 10b may be shape
  • the 1st convex part 10a and the 2nd convex part 10b are provided in the outer peripheral surface of the columnar or cylindrical core as a main-body part of the core 10 with a convex part.
  • the method of sticking the resin film to form (for example, a film tape from a thermoplastic resin) can be mentioned. This resin film may have an adhesive layer on one side for sticking to the outer peripheral surface of the core.
  • the method of sticking the resin film using an adhesive it is possible to reattach the film, so that the position adjustment or position change of the convex portion is facilitated.
  • the method of forming the convex portion by sticking the resin film is advantageous in terms of the manufacturing cost of the convex core 10 and the simplicity of manufacturing, and the convex core 10 having sufficient strength is provided. Obtainable.
  • the resin film may be attached to the outer peripheral surface of the core using an adhesive.
  • the polarizing plate wound around the convex core 10 includes a polarizer and a protective film laminated on at least one surface thereof.
  • the protective film may be laminated
  • the protective film is usually bonded to the polarizer via an adhesive layer.
  • an active energy ray-curable adhesive such as an ultraviolet curable adhesive or a water-based adhesive such as a polyvinyl alcohol resin aqueous solution can be used.
  • the total thickness of the polarizing plate is generally about 30 to 300 ⁇ m.
  • the polarizer one obtained by adsorbing and orienting a dichroic dye on a uniaxially stretched polyvinyl alcohol resin can be suitably used.
  • the dichroic dye iodine or a dichroic dye can be used.
  • the polyvinyl alcohol resin constituting the polarizer a saponified polyvinyl acetate resin can be used.
  • the polyvinyl acetate-based resin include polyvinyl acetate, which is a homopolymer of vinyl acetate, and copolymers of vinyl acetate and other monomers copolymerizable therewith.
  • Examples of other monomers copolymerizable with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids and (meth) acrylamides having ammonium groups.
  • (meth) acryl means at least one selected from acryl and methacryl. The same applies to “(meth) acryloyl”.
  • the degree of saponification of the polyvinyl alcohol resin is usually about 85 to 100 mol%, preferably 98 mol% or more.
  • the polyvinyl alcohol resin may be modified, and for example, polyvinyl formal and polyvinyl acetal modified with aldehydes may be used.
  • the degree of polymerization of the polyvinyl alcohol resin is usually about 1000 to 10,000, and preferably about 1500 to 5,000.
  • the polarizer is a step of uniaxially stretching (typically, longitudinally uniaxially stretching in the longitudinal direction of the film) the original film made of the polyvinyl alcohol resin, and the polyvinyl alcohol resin film is dyed with a dichroic dye. It can be produced by a method including a step of adsorbing a chromatic dye, a step of treating a polyvinyl alcohol resin film adsorbed with a dichroic dye with a boric acid aqueous solution, and a step of washing with water after the treatment with the boric acid aqueous solution. You may provide the swelling process which performs the immersion process to water before a dyeing
  • the uniaxial stretching of the polyvinyl alcohol-based resin film can be performed before, simultaneously with, or after the dyeing of the dichroic dye.
  • this uniaxial stretching may be performed before boric acid treatment or during boric acid treatment. Moreover, you may uniaxially stretch in these several steps.
  • the thickness of the polarizer (average thickness over the entire width) is, for example, 40 ⁇ m or less, preferably 25 ⁇ m or less, more preferably 20 ⁇ m or less. Especially in the polarizing plate for mobile devices, the viewpoint of thinning the polarizing plate To 10 ⁇ m or less. The thickness of the polarizer is usually 2 ⁇ m or more. Even when such a thin film polarizer is used, the present invention can effectively suppress winding streak defects.
  • the protective film to be bonded to the polarizer is a light-transmitting (preferably optically transparent) thermoplastic resin such as a chain polyolefin resin (polypropylene resin, etc.), a cyclic polyolefin resin (norbornene-based).
  • Polyolefin resins such as resin); cellulose ester resins such as cellulose triacetate and cellulose diacetate; polyester resins; polycarbonate resins; (meth) acrylic resins; polystyrene resins; or a mixture or copolymer thereof. It can be a film made of an object or the like.
  • these may be protective films made of the same kind of resin or may be protective films made of different kinds of resins.
  • the protective film may be a protective film having both optical functions such as a retardation film and a brightness enhancement film.
  • a retardation film provided with an arbitrary retardation value by stretching a film made of the thermoplastic resin (uniaxial stretching or biaxial stretching) or by forming a liquid crystal layer or the like on the film. It can be.
  • chain polyolefin resin examples include a homopolymer of a chain olefin such as a polyethylene resin and a polypropylene resin, and a copolymer composed of two or more chain olefins.
  • Cyclic polyolefin-based resin is a general term for resins that are polymerized using cyclic olefins as polymerization units.
  • Specific examples of cyclic polyolefin resins include ring-opening (co) polymers of cyclic olefins, addition polymers of cyclic olefins, copolymers of cyclic olefins and chain olefins such as ethylene and propylene (typically Are random copolymers), graft polymers obtained by modifying them with unsaturated carboxylic acids or derivatives thereof, and hydrides thereof.
  • norbornene resins using norbornene monomers such as norbornene and polycyclic norbornene monomers as cyclic olefins are preferably used.
  • the cellulose ester resin is an ester of cellulose and a fatty acid.
  • Specific examples of the cellulose ester resin include cellulose triacetate, cellulose diacetate, cellulose tripropionate, and cellulose dipropionate.
  • these copolymers and those in which a part of the hydroxyl group is modified with other substituents can also be used.
  • cellulose triacetate triacetyl cellulose: TAC is particularly preferable.
  • the polyester-based resin is a resin other than the cellulose ester-based resin having an ester bond, and is generally made of a polycondensate of a polyvalent carboxylic acid or a derivative thereof and a polyhydric alcohol.
  • a dicarboxylic acid or a derivative thereof can be used, and examples thereof include terephthalic acid, isophthalic acid, dimethyl terephthalate, and dimethyl naphthalenedicarboxylate.
  • a diol can be used as the polyhydric alcohol, and examples thereof include ethylene glycol, propanediol, butanediol, neopentyl glycol, and cyclohexanedimethanol.
  • polyester resin examples include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, polytrimethylene terephthalate, polytrimethylene naphthalate, polycyclohexanedimethyl terephthalate, and polycyclohexanedimethyl naphthalate.
  • Polycarbonate resin is made of a polymer in which monomer units are bonded via a carbonate group.
  • the polycarbonate-based resin may be a resin called a modified polycarbonate having a modified polymer skeleton, a copolymer polycarbonate, or the like.
  • the (meth) acrylic resin is a resin containing a compound having a (meth) acryloyl group as a main constituent monomer.
  • Specific examples of the (meth) acrylic resin include, for example, poly (meth) acrylic acid esters such as polymethyl methacrylate; methyl methacrylate- (meth) acrylic acid copolymer; methyl methacrylate- (meth) acrylic acid Ester copolymer; methyl methacrylate-acrylate ester- (meth) acrylic acid copolymer; (meth) methyl acrylate-styrene copolymer (MS resin, etc.); methyl methacrylate and alicyclic hydrocarbon group And a copolymer with the compound (for example, methyl methacrylate-cyclohexyl methacrylate copolymer, methyl methacrylate- (meth) acrylate norbornyl copolymer, etc.).
  • a polymer based on a poly (meth) acrylic acid C 1-6 alkyl ester such as poly (meth) acrylic acid methyl is used, and more preferably methyl methacrylate is used as a main component (50 to 100). % Methyl methacrylate-based resin is used.
  • the thickness of the protective film is preferably 90 ⁇ m or less, more preferably 50 ⁇ m or less, and even more preferably 30 ⁇ m or less, from the viewpoint of thinning the polarizing plate.
  • the thickness of the protective film is usually 5 ⁇ m or more from the viewpoint of strength and handleability. Even when such a thin protective film is used, according to the present invention, winding streak defects can be effectively suppressed.
  • the polarizing plate may include a film or layer other than the protective film.
  • films and layers other than the protective film include: an adhesive layer; a separate film that protects the outer surface of the adhesive layer (release film); a protective film that protects the surface of the protective film (surface protective film); Surface treatment layer (coating layer) for imparting functions; including various optical functional films.
  • a conventionally known appropriate pressure-sensitive adhesive can be used.
  • a (meth) acrylic pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, a polyester-based pressure-sensitive adhesive, and a polyamide-based pressure-sensitive adhesive examples thereof include an adhesive, a polyether-based adhesive, a fluorine-based adhesive, and a rubber-based adhesive.
  • a (meth) acrylic pressure-sensitive adhesive is preferably used from the viewpoints of transparency, adhesive strength, reliability, reworkability, and the like.
  • the thickness of the pressure-sensitive adhesive layer can be generally 1 to 40 ⁇ m (for example, 3 to 25 ⁇ m).
  • the constituent material of the separate film can be a polyethylene resin such as polyethylene, a polypropylene resin such as polypropylene, a polyester resin such as polyethylene terephthalate, and the like. Among these, a stretched film of polyethylene terephthalate is preferable.
  • constituent material of the protective film examples include polyethylene resins such as polyethylene, polypropylene resins such as polypropylene, and polyester resins such as polyethylene terephthalate. Among them, from the viewpoint of moisture permeability and mechanical strength A stretched film of polyethylene terephthalate is preferred.
  • Examples of the surface treatment layer include a hard coat layer, an antiglare layer, an antireflection layer, an antistatic layer, and an antifouling layer.
  • a reflective polarizing film that transmits a certain kind of polarized light and reflects polarized light that shows the opposite property
  • a film with an antiglare function having an uneven shape on the surface
  • a film with a surface antireflection function examples thereof include a reflective film having a reflective function on the surface; a transflective film having both a reflective function and a transmissive function; and a viewing angle compensation film.
  • the width of the polarizing plate wound around the convex core 10 is not particularly limited, but is usually about 300 to 2500 mm, and more typically about 500 to 2000 mm.
  • the length of the polarizing plate is not particularly limited, but is usually about several hundred m to 3000 m (for example, about 2000 m), and more typically about 1500 to 2500 m.
  • variety of the protective film bonded to this may be the same or different, the width
  • FIG. 3 shows the convex part of the core 10 with convex part and the polarizing plate 20 to be wound. It is sectional drawing which shows typically an example of the positional relationship regarding the width direction between.
  • the polarizing plate 20 comprised from the polarizer 21 and the 1st protective film 22 bonded on the one surface and the 2nd protective film 23 bonded on the other surface is used as an example.
  • the layer configuration of the polarizing plate is not limited to this as described above.
  • FIG. 3 shows only the first convex portion 10a of the core 10 with convex portions, but the contents described below are similarly applied to the positional relationship with the second convex portion 10b.
  • the polarizing plate 20 has one end region in the width direction of the protective film located on the first convex portion 10a and is not shown in FIG. It winds around the core 10 with a convex part so that it may be located on the 2 convex part 10b.
  • the protective films first and second protective films 22 and 23
  • both protective films are wound so as to satisfy the above positional relationship. It is preferable.
  • That one end region of the protective film is located on the first convex portion 10a means that the end portion (end surface, T 1 in FIG. 3) of the protective film is the first convex portion 10a as in the example shown in FIG.
  • the end T 1 of the protective film is positioned outside the outer end T 2 of the first convex portion 10a, but the end region in the vicinity of the end T 1 of the protective film is This includes the case where it is placed on the first convex portion 10a.
  • the end T 1 of the protective film being positioned on the first convex portion 10a means that the end T 1 is positioned between the outer end T 2 and the inner end T 3 of the first convex portion 10a ( Including the case where T 1 matches T 2 or T 3 ).
  • T 1 matches T 2 or T 3
  • the end T 1 of the protective film is located on the inner side of the inner end (end face) T 3 of the first convex portion 10a, it is difficult to obtain a winding streak defect suppressing effect.
  • the end portion T 4 in the width direction of the polarizer 21 is positioned inside the inner end portion T 3 of the first convex portion 10a.
  • the end T 4 of the polarizer 21 is positioned on the first convex portion 10a, that is, the polarizer.
  • the convex portion so that the end portion T 4 of 21 is located between the outer end portion T 2 and the inner end portion T 3 of the first convex portion 10a (including the case where T 1 coincides with T 2 or T 3 ). It may be wound around the attached core 10.
  • the former is preferred.
  • width W 2 of the end region of the protective film is It is preferably 5 mm or more, and more preferably 10 mm or more. If the overlap width W 2 is too small, it is difficult to obtain a sufficient winding streak defect suppressing effect.
  • the upper limit of the overlap width W 2 is not particularly limited, but can be about 30 mm, for example.
  • the width W 1 of the first convex portion 10a is preferably 5 mm or more so that the preferable overlapping width W 2 is obtained.
  • the upper limit of the width W 1 is not particularly limited, and is 100 mm, for example.
  • the height H of the first convex portion 10a is preferably 50 ⁇ m or more.
  • the upper limit of the height H can be 1500 ⁇ m (for example, 1000 ⁇ m).
  • FIG. Figure 5 is an example of forming a first convex portion 10a by superimposing winding the second resin film t 2 on the first resin film t 1.
  • the end portion T 4 of the polarizer 21 when the end portion T 4 of the polarizer 21 is located on the first convex portion 10a in order to obtain a winding streak defect suppression effect more effectively, the end portion T 4 is the as compared with the case located inside the inner end portion T 3 of the first convex portion 10a, it is preferable that the height H of the first protrusion 10a is lower. That is, the thickness of the polarizer 21 located on the first convex portion 10a increases the height difference (step portion) generated between the winding start end of the polarizing plate and the outer peripheral surface of the core that causes winding streak defects. Therefore, it is advantageous for suppressing the winding streak defect that the height H of the first convex portion 10a is lower, for example, 400 ⁇ m or less, and further 200 ⁇ m or less.
  • the first convex portion is obtained in order to more effectively obtain the winding streak defect suppressing effect. It is preferable to make the height H of 10a relatively high, for example, 150 ⁇ m or more, more preferably 300 ⁇ m or more.
  • the width of the protective film is made larger, and the protective film is generally pasted so that both ends in the width direction of the protective film are located outside the both ends in the width direction of the polarizer.
  • the protrusion width W 3 of the protective film (the first protective film 22 and the second protective film 23) (from the end T 1 of the protective films 22 and 23 to the end T 4 of the polarizer 21).
  • the distance can be about 1 to 100 mm (for example, about 5 to 60 mm).
  • the polarizing plate 20 is wound up by rotating the core 10 with the convex portion around its rotation axis.
  • the fixing member 30 is used [FIG. 6 (a)], and the winding start end (longitudinal direction start end) of the polarizing plate 20 is provided with a convex portion. It is preferable to fix to the outer peripheral surface of the core 10 (FIG. 6B). Since the polarizing plate 20 can be easily fixed, a double-sided tape can be preferably used as the fixing member 30.
  • a fixing member 30 that is a double-sided tape is attached to the outer peripheral surface of the core 10 with a convex portion parallel to the rotation axis of the core 10 with a convex portion, and the winding start end of the polarizing plate 20 is polarized on the fixing member 30. It sticks so that the short side direction of the board 20 may become parallel to the rotating shaft of the core 10 with a convex part.
  • the winding start end of the polarizing plate 20 is fixed to the core 10 with the convex portion using the fixing member, the height difference (step) between the winding start end of the polarizing plate 20 and the outer peripheral surface of the core 10 with the convex portion.
  • the winding streak defect can be effectively suppressed even in such a case.
  • a long polarizing plate having a layer structure of a protective film [thickness 40 ⁇ m] / protective film [thickness 62 ⁇ m] made of an agent layer / TAC and a stretched polyethylene phthalate is continuously produced by a roll-to-roll method. Then, it was wound around a cylindrical core (no protrusion) to obtain a polarizing plate roll.
  • TAC triacetylcellulose
  • the specific conditions for producing the polarizing plate roll are as follows.
  • the winding start end (longitudinal direction start end) of the polarizing plate was fixed to the outer peripheral surface of the core using a double-sided tape having a thickness of 176 ⁇ m.
  • Cylindrical core (no protrusion) ⁇ Material: FRP (fiber reinforced plastic), ⁇ Width direction (rotating axis direction) length: 1480 mm, ⁇ Diameter: 167mm ⁇ , [2] Polarizing plate Width of protective film: 1330 mm, -Polarizer width: 1270 mm, - Figure 3 in W 3: 30 mm (both ends), -Polarizing plate length: about 2000m -Tension at the time of winding a polarizing plate: 60N.
  • a polarizing plate roll was produced in the same manner as in Comparative Example 1 except that the tension at the time of winding the polarizing plate was 100 N (Comparative Example 2), 150 N (Comparative Example 3), and 250 N (Comparative Example 4), respectively.
  • Example 1 A polarizing plate roll was produced in the same manner as in Comparative Example 1 except that the same core with projections as in FIG. 1 was used and the specific conditions for producing the polarizing plate roll were as follows.
  • a polarizing plate one edge part area
  • the end T 4 of the polarizer 21 is positioned inside the inner end T 3 of the first and second convex portions 10 a and 10 b (the polarizer and the convex portion). Wound it so that it would not overlap.
  • the first and second convex portions of the core with convex portions are adhered to the outer peripheral surface of the core main body portion over a substantially entire circumference with a fixed width resin film tape having an adhesive layer on one side. Further, a resin film tape having the same width and having an adhesive layer on one side was attached to the outer peripheral surface thereof by shifting the seam by about 15 mm and pasting the entire circumference.
  • Example 2 A polarizing plate roll was produced in the same manner as in Example 1, except that the tension at the time of winding the polarizing plate was 150 N (Example 2) and 250 N (Example 3), respectively.
  • Example 4 Example 1 except that the tension at the time of winding the polarizing plate was 150 N, the resin film tape was wound on three layers, and the height of the first and second protrusions (H in FIG. 3) was 540 ⁇ m. Thus, a polarizing plate roll was produced.
  • a polarizing plate roll was produced in the same manner as in Comparative Example 1 except that the same core with projections as in FIG. 1 was used and the specific conditions for producing the polarizing plate roll were as follows.
  • a polarizing plate one edge part area
  • one end T 4 in the width direction of the polarizer 21 is located on the first convex portion 10a, and the other end T 4 is on the second convex portion 10b.
  • the fixed-width resin film tape which has an adhesive layer on one side is stuck on the outer peripheral surface of a core main-body part over substantially the whole circumference like FIG. Formed by.
  • Example 6> A polarizing plate roll was produced in the same manner as in Example 5 except that the height of the first and second protrusions (H in FIG. 4) was 180 ⁇ m.
  • Table 1 summarizes the main production conditions for polarizing plate rolls in Examples 1 to 6 and Comparative Examples 1 to 4.
  • the produced polarizing plate roll was stored for 15 days in an environment of 25 ° C. and 50% RH, and then the polarizing plate roll was unwound and the generation length of winding streak defects from the beginning of the polarizing plate was measured. The results are shown in Table 1.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un rouleau de plaque polarisante qui comprend : un noyau d'enroulement qui a une surface circonférentielle extérieure qui comporte une première saillie et une seconde saillie qui s'étendent dans la direction circonférentielle ; et une plaque polarisante qui est enroulée autour du noyau d'enroulement. La plaque polarisante comprend un polariseur et un film de protection qui est stratifié sur au moins une surface du polariseur, et est enroulée autour du noyau d'enroulement de telle sorte qu'une région de partie d'extrémité dans la direction de largeur du film de protection est positionnée au-dessus de la première saillie, et que l'autre région de partie d'extrémité est positionnée au-dessus de la seconde saillie.
PCT/JP2015/076642 2014-10-24 2015-09-18 Rouleau de plaque polarisante Ceased WO2016063669A1 (fr)

Priority Applications (2)

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KR1020177013495A KR102281566B1 (ko) 2014-10-24 2015-09-18 편광판 롤
CN201580055963.4A CN107076913B (zh) 2014-10-24 2015-09-18 偏振板卷

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-217573 2014-10-24
JP2014217573A JP6370190B2 (ja) 2014-10-24 2014-10-24 偏光板ロール

Publications (1)

Publication Number Publication Date
WO2016063669A1 true WO2016063669A1 (fr) 2016-04-28

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KR (1) KR102281566B1 (fr)
CN (1) CN107076913B (fr)
TW (1) TWI676828B (fr)
WO (1) WO2016063669A1 (fr)

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JP2018177440A (ja) * 2017-04-11 2018-11-15 昭和電工パッケージング株式会社 巻き芯およびロール状ラミネート材

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JP7463050B2 (ja) 2018-06-05 2024-04-08 日東電工株式会社 偏光フィルムロールの製造方法
JP6787974B2 (ja) * 2018-11-06 2020-11-18 住友化学株式会社 偏光板、画像表示装置及び偏光板の製造方法

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WO2012035837A1 (fr) * 2010-09-17 2012-03-22 コニカミノルタオプト株式会社 Procédé et système de production d'un dispositif d'affichage optique
WO2014091921A1 (fr) * 2012-12-13 2014-06-19 コニカミノルタ株式会社 Rouleau de film optique, son procédé de production, plaque de polarisation et dispositif d'affichage

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JP4655663B2 (ja) * 2005-02-21 2011-03-23 コニカミノルタオプト株式会社 塗布層を有するロール状フィルムの製造方法、ロール状光学フィルム、偏光板、液晶表示装置
WO2008011464A1 (fr) * 2006-07-18 2008-01-24 3M Innovative Properties Company Procédé de calandrage pour fabriquer un film optique
JP4147266B1 (ja) * 2007-06-28 2008-09-10 西工業株式会社 広幅偏光板およびその製法
JP5510459B2 (ja) * 2009-09-14 2014-06-04 コニカミノルタ株式会社 光学フィルムの製造方法
JP6055171B2 (ja) 2011-07-29 2016-12-27 住友化学株式会社 偏光板ロールおよびその製造方法
JP6045161B2 (ja) * 2012-03-07 2016-12-14 日東電工株式会社 偏光板の製造方法
JP5623453B2 (ja) * 2012-03-26 2014-11-12 富士フイルム株式会社 ポリマーフィルムロール、光学フィルム及びポリマーフィルムロール製造方法

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JPH11157592A (ja) * 1997-11-28 1999-06-15 Kanegafuchi Chem Ind Co Ltd 位相差フィルム貼着体又はその原反の梱包方法及び該巻取り方法
WO2012035837A1 (fr) * 2010-09-17 2012-03-22 コニカミノルタオプト株式会社 Procédé et système de production d'un dispositif d'affichage optique
WO2014091921A1 (fr) * 2012-12-13 2014-06-19 コニカミノルタ株式会社 Rouleau de film optique, son procédé de production, plaque de polarisation et dispositif d'affichage

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Publication number Priority date Publication date Assignee Title
JP2018177440A (ja) * 2017-04-11 2018-11-15 昭和電工パッケージング株式会社 巻き芯およびロール状ラミネート材

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TWI676828B (zh) 2019-11-11
JP2016085331A (ja) 2016-05-19
KR20170072922A (ko) 2017-06-27
CN107076913B (zh) 2019-06-07
CN107076913A (zh) 2017-08-18
KR102281566B1 (ko) 2021-07-26
TW201617649A (zh) 2016-05-16
JP6370190B2 (ja) 2018-08-08

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