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WO2022210605A1 - Papier d'enregistrement - Google Patents

Papier d'enregistrement Download PDF

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Publication number
WO2022210605A1
WO2022210605A1 PCT/JP2022/015190 JP2022015190W WO2022210605A1 WO 2022210605 A1 WO2022210605 A1 WO 2022210605A1 JP 2022015190 W JP2022015190 W JP 2022015190W WO 2022210605 A1 WO2022210605 A1 WO 2022210605A1
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WO
WIPO (PCT)
Prior art keywords
layer
recording paper
styrene
resin
receiving layer
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/JP2022/015190
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English (en)
Japanese (ja)
Inventor
優佳 北村
祐太郎 菅俣
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Yupo Corp
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Yupo Corp
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Filing date
Publication date
Application filed by Yupo Corp filed Critical Yupo Corp
Priority to JP2023511304A priority Critical patent/JP7609974B2/ja
Publication of WO2022210605A1 publication Critical patent/WO2022210605A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks
    • C09D11/36—Inkjet printing inks based on non-aqueous solvents

Definitions

  • the present invention relates to recording paper.
  • Inkjet printing allows computer-generated full-color images to be printed as-is without the need for a printing plate. Inkjet printing is widely used in many fields because it does not require printing plates and because computer generated images can be easily modified. Inks used in inkjet printing are generally water-based inks, such as those used in home-use inkjet printers, but solvent-based inks are also preferred due to their water resistance and ink fixability. Solvent-based inks are now being used even in indoor exhibitions and the like where water-based inks have been used in the past.
  • JP 2010-234677 A Japanese Patent Application Laid-Open No. 2001-270238
  • the receiving layer containing a vinyl chloride copolymer as in Patent Document 1 has problems such as waviness caused by solvents, blocking, and low weather resistance. Attempts to remedy these problems with additives can adversely affect printability. Further, the pigment coating as disclosed in Patent Document 2 has problems such as easy adhesion of water and dirt, low strength of the receiving layer, low glossiness, and low sharpness of the image.
  • the present invention combines high smoothness and excellent glossiness, has high image density, is excellent in solvent-based ink absorption and drying properties, and is used when printed matter is exposed outdoors for a long period of time. To provide a recording paper which does not require water-resistant and antifouling treatment.
  • the present inventors have made intensive studies. As a result, the present inventors have found that recording paper having the desired properties can be provided, and have completed the present invention. That is, the present invention is as follows.
  • the styrene resin is a copolymer of styrene monomer, ethylene and butadiene; a copolymer of styrene monomer, ⁇ -olefin and butadiene; and a styrene monomer, ethylene, ⁇ -
  • the recording paper according to any one of (1) to (3), comprising at least one selected from the group consisting of copolymers of olefins and butadiene.
  • the arithmetic average roughness (Ra) according to JIS B0601:2003 of the base layer side (back layer side) surface of the recording paper is 0.2 ⁇ m or more (1) to (4).
  • Recording paper according to any one of (6) The recording paper according to any one of (1) to (5), wherein the static friction coefficient according to JIS K7125:1999 of the receiving layer side surface of the recording paper is 0.10 to 0.70. . (7)
  • the surface resistivity of the substrate layer side (back layer side) surface of the recording paper measured according to JIS K6911:2006 is 1 ⁇ 10 8 to 9 ⁇ 10 12 ⁇ .
  • the bending resistance of the recording paper according to JIS L1096:2010 bending resistance A method is 0.3 to 10 mN. recording paper.
  • the present invention has both high smoothness and excellent glossiness, high image density, excellent ink absorption and drying properties, and is waterproof and antifouling even when the printed matter is exposed to the outdoors for a long time. It is possible to provide recording paper that does not require
  • FIG. 1 is a schematic cross-sectional view showing an example of the layer structure of a recording sheet
  • FIG. 1 is a schematic cross-sectional view showing an example of the layer structure of a recording sheet
  • FIG. 1 is a schematic cross-sectional view showing an example of the layer structure of a recording sheet
  • (meth)acrylic refers to both acrylic and methacrylic.
  • FIG. 1 is a schematic cross-sectional view showing an example of the layer structure of a recording sheet of this embodiment.
  • a recording paper 100 shown in FIG. 1 has at least a receiving layer 10 containing a styrene resin on one side of a base layer 20 made of a thermoplastic resin film.
  • the base layer 20 may have a two-layer structure of a core layer 21 and a back layer 22 . That is, the recording paper 100 of this embodiment may have the receiving layer 10, the core layer 21, and the back layer 22 in this order.
  • the inkjet printing layer is provided on the surface of the receiving layer 10 side in FIGS. 1 and 2 .
  • the receiving layer is provided on the base material layer and positioned on the outermost surface of the recording paper of the present embodiment.
  • the receiving layer receives solvent-based inks.
  • the receiving layer contains a styrenic resin.
  • a styrene-based resin By containing a styrene-based resin in the receiving layer, it is possible to improve the absorption and drying properties of the solvent-based ink.
  • Styrenic resins are polymers mainly having structural units derived from styrene, and are homopolymers of styrene monomers or copolymers with other monomer components.
  • the styrene resin only homopolymers of styrene monomers and copolymers of styrene monomers and other monomers are used.
  • the styrene-based resin used in the receiving layer is a homopolymer of a styrene-based monomer, and a copolymer of a styrene-based monomer and another monomer. It preferably includes coalescence.
  • the styrenic resins used in the receptor layer can be used singly or in combination of two or more. Styrenic monomers include, for example, styrene, ⁇ -methylstyrene, p-methylstyrene, p-ethylstyrene, vinyltoluene, vinylxylene, and vinylnaphthalene.
  • Olefins are preferably used as other monomers in the copolymer.
  • Olefins include, for example, ⁇ -olefins; diene-based monomers; and other monomers such as ethylene, propylene and cyclohexene.
  • ⁇ -olefins include 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-heptene, 1-octene, 1-nonene, and 1-decene. is mentioned.
  • diene-based monomers include butadiene, isoprene, and chloroprene.
  • the copolymer may be a binary system or a multi-component system having a ternary or higher monomer component, and may be a random copolymer or a block copolymer. Further, as other monomer components in the copolymer, for example, (meth)acrylic acid, (meth)acrylic acid ester, maleic anhydride, vinyl acetate, acrylonitrile and the like may be used.
  • Styrene-based resins include, for example, styrene homopolymers, styrene/ethylene copolymers, styrene/propylene copolymers, styrene/butadiene copolymers, styrene/butadiene/styrene copolymers, styrene/isoprene copolymers, styrene ⁇ Isoprene-styrene copolymer, styrene-ethylene-butylene copolymer, styrene-ethylene-propylene copolymer, styrene-ethylene-butadiene copolymer, styrene-butadiene-butylene copolymer, styrene-acrylonitrile copolymer , acrylonitrile-butadiene-styrene copolymer, acrylonitrile-styrene-acryl
  • the styrene-based resin preferably contains a copolymer of a styrene-based monomer and butadiene, a copolymer of styrene-based monomer, ethylene and butadiene; and at least one selected from the group consisting of copolymers of styrenic monomers, ethylene, ⁇ -olefins and butadiene.
  • styrene resin examples include a styrene/ethylene/butadiene copolymer, a styrene/1-butene/butadiene copolymer, a styrene/1-pentene/butadiene copolymer, a styrene/1-hexene/butadiene copolymer, Styrene/4-methyl-1-pentene/butadiene copolymer, styrene/1-heptene/butadiene copolymer, styrene/1-octene/butadiene copolymer, styrene/1-nonene/butadiene copolymer, styrene/ 1-decene/butadiene copolymer, styrene/ethylene/1-butene/butadiene copolymer, styrene/ethylene/1-pentene/butadiene copolymer
  • the content of the styrene-based resin in the receiving layer is preferably 10% by mass or more, more preferably 20% by mass or more, from the viewpoint of improving solvent-based ink absorption and drying properties and suppressing waviness after printing. % by mass or more is more preferable.
  • the content of the styrene-based resin is preferably 100% by mass or less, more preferably 90% by mass or less, and even more preferably 80% by mass or less, from the viewpoint of interlaminar strength between the core layer and the receiving layer.
  • the content of the copolymer is From the viewpoint of interlaminar strength between layers, the amount is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more relative to the total amount of the styrene resin. From the viewpoint of smoothness, the content of the copolymer is preferably 30% by mass or less, more preferably 25% by mass or less, and even more preferably 20% by mass or less relative to the total amount of the styrene resin.
  • the receiving layer may be a resin film using only a styrene-based resin, or may contain a thermoplastic resin other than a styrene-based resin within a range that does not impair the effects of the present invention.
  • the thermoplastic resin other than the styrene resin may be a resin compatible with the styrene resin from the viewpoint of image clarity, or a resin not compatible with the styrene resin from the viewpoint of drying.
  • a resin compatible with a styrene resin refers to a resin that forms a single phase when mixed with a styrene resin in a mass ratio of 1:1 and heated at 230°C.
  • thermoplastic resin in the receiving layer consists only of a styrene-based resin, or when it contains a styrene-based resin and a resin compatible with the styrene-based resin, there is a tendency that bleeding during solvent inkjet printing can be suppressed.
  • thermoplastic resin in the receiving layer contains a styrene resin and a resin that is not compatible with the styrene resin, the solvent easily penetrates through the gaps between the resins, and the solvent-based ink dries. tend to improve.
  • Thermoplastic resins that can be used in combination include, for example, polyethylene-based resins, polypropylene-based resins, and polyolefin-based resins such as ethylene/cyclic olefin copolymers; nylon-6, nylon-6,6, nylon-6,10, and nylon-6. , 12; thermoplastic polyester resins such as polyethylene terephthalate and its copolymers, polyethylene naphthalate and aliphatic polyester; and polycarbonate resins such as aromatic polycarbonate and aliphatic polycarbonate.
  • polyolefin-based resins are preferable as thermoplastic resins that can be used together from the viewpoint of suppressing a decrease in interlaminar strength with the base layer when the adjacent base layer contains a polyolefin-based resin.
  • the receiving layer may contain fillers.
  • examples of usable fillers include inorganic fillers and organic fillers.
  • the base material layer contains a highly solvent-resistant resin such as polyolefin resin
  • the base material layer follows the shrinkage of the receiving layer due to the dissolution of the styrene resin during printing, and curling occurs on the printed surface side.
  • shrinkage of the receiving layer can be suppressed even if the styrene-based resin is dissolved, and curling can be reduced.
  • the receiving layer contains a filler
  • a gap is likely to occur between the receiving layer and the surrounding thermoplastic resin such as a styrene-based resin, which tends to improve the drying property of the solvent-based ink.
  • the receiving layer is a stretched layer that is stretched in at least one direction, the containing of the filler tends to form pores inside the receiving layer, resulting in a stretched porous layer. If the receiving layer is a stretched porous layer, the solvent-based ink absorption and drying properties are further enhanced.
  • inorganic filler examples include calcium carbonate, calcined clay, silica, diatomaceous earth, clay, talc, titanium oxide, barium sulfate, barium titanate, alumina, zeolite, mica, sericite, bentonite, sepiolite, vermiculite, dolomite, wax. Inorganic particles such as lastonite or glass fibers can be used.
  • the average particle size of the inorganic filler as measured by a particle size distribution meter based on laser diffraction is usually 0.01 to 15 ⁇ m, preferably 0.1 to 5 ⁇ m.
  • Organic filler examples include organic particles of polyethylene terephthalate, polybutylene terephthalate, polyamide, polycarbonate, polyethylene naphthalate, polystyrene, melamine resin, polyethylene sulfite, polyimide, polyethyl ether ketone, or polyphenylene sulfite. can.
  • the above inorganic filler and organic filler can be used alone or in combination.
  • the content of the filler in the receptive layer (when an inorganic filler and an organic filler are used together, the total amount thereof) can be, for example, 65% by mass or less, or 55% by mass or less.
  • the content of the filler in the receiving layer is preferably 20% by mass or less, more preferably 10% by mass or less.
  • the content of the filler in the receiving layer is preferably 20% by mass or more, more preferably 30% by mass or more. It is preferably 40% by mass or more, and more preferably 40% by mass or more.
  • the receiving layer may further contain a curing agent, an ink-setting agent, an ultraviolet absorber, a surfactant, or the like, if necessary. These can be contained within a range that does not impair the effects of the present invention.
  • the solvent absorption amount of the receiving layer is preferably 5 ml/m 2 or more, more preferably 10 ml/m 2 or more, and even more preferably 15 ml/m 2 or more.
  • the solvent absorption amount of the receiving layer is preferably 100 ml/m 2 or less, more preferably 90 ml/m 2 or less, and even more preferably 80 ml/m 2 or less. If the solvent absorption amount of the receiving layer is within the above range, the drying property of the solvent-based ink is excellent, so solvent-based ink transfer can be reduced when the recording paper after solvent-inkjet printing is stacked on other paper and stored. tend to be able to A specific method for measuring the amount of solvent absorbed by the receiving layer will be described in Examples.
  • the layer strength of the receiving layer is preferably 0.9 kgf/cm or more, more preferably 1.0 kgf/cm or more, and even more preferably 1.1 kgf/cm or more.
  • the layer strength of the receiving layer is preferably 2.0 kgf/cm or less, more preferably 1.9 kgf/cm or less, and even more preferably 1.8 kgf/cm or less. If the layer strength of the receptive layer is within the above range, the receptive layer is less likely to be scraped by sand or the like when the recording paper is posted outdoors, and the weather resistance is high, so the printed pattern can be maintained for a long period of time. tend to be able to A specific method for measuring the layer strength of the receiving layer will be described in Examples.
  • the thickness of the receiving layer is preferably 3 ⁇ m or more, more preferably 4 ⁇ m or more, and even more preferably 5 ⁇ m or more, from the viewpoint of sufficiently absorbing the solvent.
  • the thickness of the receiving layer is preferably 100 ⁇ m or less, more preferably 90 ⁇ m or less, and even more preferably 80 ⁇ m or less.
  • Specific graft monomers include, for example, maleic anhydride, itaconic anhydride, citraconic anhydride, methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, glycidyl (meth)acrylate, Maleic acid monoethyl ester, maleic acid diethyl ester, fumaric acid monomethyl ester, fumaric acid dimethyl ester, itaconic acid monomethyl ester, itaconic acid diethyl ester, (meth)acrylamide, maleic acid monoamide, maleic acid diamide, maleic acid-N-mono Ethylamide, maleic acid-N,N-diethylamide, maleic acid-N-monobutylamide, maleic acid-N,N-dibutylamide, fumaric acid monoamide, fumaric acid diamide, fumaric acid-N-monoethylamide, fumaric acid -N,N-diethy
  • the substrate layer preferably has a large number of pores inside the film. That is, the substrate layer is preferably a porous layer. Also, the porosity calculated by the following formula (1) is preferably 5 to 60%, more preferably 10 to 45%. The presence of the pores improves the light diffusion rate and makes it possible to obtain a base layer with high opacity. Furthermore, the presence of pores tends to suppress dimensional change due to swelling of the solvent in the solvent-based ink, thereby suppressing waviness of the recording paper after solvent ink jet printing.
  • the thickness of the substrate layer is preferably 40-200 ⁇ m, more preferably 50-150 ⁇ m. If the thickness of the base material layer is within the above range, the Gurley bending resistance is high and the curl balance is excellent.
  • the thickness of the core layer can be appropriately determined according to the thickness of the back layer described later.
  • the thickness of the core layer is preferably 40 to 200 ⁇ m, more preferably 50 to 150 ⁇ m, from the viewpoint of obtaining sufficient stiffness.
  • the back layer is provided on the surface of the core layer opposite to the receiving layer.
  • the back layer mainly has a function of promoting the evaporation of the solvent after printing from the receiving layer and suppressing waviness of the paper surface due to the solvent when the recording sheets are stacked and stored. Further, the surface of the back surface layer has moderate surface roughness unlike the receiving layer which has smoothness. When the recording paper is stacked and stored, the occurrence of blocking can be prevented by providing the surface of the back surface layer with a suitable surface roughness.
  • the solid content ratio is preferably 0 to 200 parts by mass of the antistatic agent with respect to 100 parts by mass of the anchoring agent, more preferably. 20 to 150 parts by mass, more preferably 30 to 100 parts by mass.
  • the stretching temperature when stretching is preferably in the range of the glass transition temperature of the thermoplastic resin or higher. Also, when the thermoplastic resin is a crystalline resin, the stretching temperature should be above the glass transition point of the non-crystalline portion of the thermoplastic resin and below the melting point of the crystalline portion of the thermoplastic resin. is preferred, and specifically, a temperature lower than the melting point of the thermoplastic resin by 2 to 60°C is preferred.
  • the substrate layer is preferably subjected to an oxidation treatment to activate its surface.
  • the surface of the receiving layer may be subjected to an oxidation treatment.
  • Oxidation treatment tends to adjust the wettability of the surface and suppress print bleeding.
  • Examples of oxidation treatment include corona discharge treatment, flame treatment, plasma treatment, glow discharge treatment, ozone treatment, and the like, and these treatments can be combined.
  • the oxidation treatment is preferably corona discharge treatment or flame treatment, and more preferably corona discharge treatment.
  • the solvent absorption rate of the receiving layer of the recording paper can be measured using a water absorption tester specified in JIS P8140.
  • the solvent absorption speed of the recording paper was determined by contacting the surface of the receiving layer of the test piece with a solvent (diethylene glycol ethyl methyl ether, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) for 5 seconds, calculating the amount of solvent absorption, and calculating the solvent contact time. The value obtained by dividing was taken as the solvent absorption rate (ml/m 2 ⁇ s).
  • the thickness (total thickness) of the recording paper was measured according to JIS K7130:1999 using a constant pressure thickness measuring instrument (trade name: PG-01J, manufactured by Teclock Co., Ltd.).
  • the thickness of each layer in the recording paper can be measured by cooling the sample to be measured with liquid nitrogen to a temperature of -60°C or lower and placing it on a glass plate with a razor blade (manufactured by Sic Japan Co., Ltd.
  • a sample for cross-sectional observation is prepared by cutting at a right angle with a proline blade), and the obtained sample is cross-sectioned using a scanning electron microscope (manufactured by JEOL Ltd., trade name: JSM-6490). Observation was performed, and the boundary line for each resin composition was determined from the appearance of the composition, and the total thickness of the recording paper was multiplied by the thickness ratio of each layer observed.
  • Gurley hardness> The Gurley bending resistance of the recording paper conforms to JIS L1096:2010 and is measured in the MD direction using a Gurley bending resistance tester (manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd.; (trade name: GAS-100)).
  • ⁇ Arithmetic mean roughness Ra> The arithmetic mean roughness Ra ( ⁇ m) of the substrate layer side surface of the recording paper (the back layer side when the core layer and the back layer are provided as the substrate layer) is in accordance with JIS B0601: 2003, and the three-dimensional roughness Measurement was performed using a measuring device (manufactured by Kosaka Laboratory Co., Ltd., trade name: SE-3AK) and an analysis device (manufactured by Kosaka Laboratory Co., Ltd., trade name: SPA-11).
  • the surface resistivity of the substrate layer side surface of the recording paper (the back surface layer side when the core layer and the back layer are provided as the substrate layer) is 1 under the conditions of 23° C. and 50% relative humidity. In the case of ⁇ 10 7 ⁇ or more, it was measured using an electrode of the double ring method according to JIS K6911:2006. When the surface resistivity is less than 1 ⁇ 10 7 ⁇ , the resistance (R) obtained by measuring with the 4-probe method in accordance with JIS K7194:1994 is multiplied by the correction factor F to obtain the surface resistivity. and
  • Blocking was evaluated according to the following criteria. 3 (good): can be pulled out smoothly without a peeling sound 2 (acceptable): there is a peeling sound, but the appearance of the base layer after picking up is not impaired (practical lower limit) 1 (improper): there is a loud peeling sound, and the appearance of the substrate layer after picking up is impaired (not suitable for practical use)
  • ⁇ Weather resistance> In applications such as posters, the ink may peel off due to outdoor use, which may pose a problem.
  • weather resistance evaluation results tend to fluctuate due to various factors such as climate and weather when exposure tests are actually performed outdoors.
  • the printed matter was subjected to a weather resistance acceleration treatment (exposure test) under uniform conditions in accordance with JIS K-7350-4, and then subjected to solvent inkjet printing to evaluate ink adhesion. More specifically, the acceleration treatment was performed under the following conditions.
  • a super-accelerated weathering tester manufactured by Daipla Wintes Co., Ltd., trade name "Metal Weather KU-R5N-A", metal halide lamp type
  • Aluminum foil tape "AL-T” (Takeuchi Kogyo Co., Ltd.) (trade name)) was attached to a stainless steel plate (100 mm x 200 mm) and fixed, and this was installed in the tester. The irradiance on the surface of the test piece was set at 90 W/m 2 and the black panel temperature was set at 63°C.
  • Example 1 After melt-kneading the resin composition a described in Table 1 with an extruder set at 230°C, it is supplied to an extrusion die set at 250°C and extruded into a sheet, which is cooled to 60°C with a cooling device. An unstretched sheet was obtained. This unstretched sheet was heated to 135° C. and stretched 5 times in the machine direction by utilizing the difference in peripheral speed of the roll group to obtain a monolayer uniaxially stretched sheet.
  • the resin composition c is melt-kneaded with an extruder set at 230°C, extruded into a sheet shape and laminated on the first surface of the single-layer uniaxially stretched sheet, and at the same time, the resin composition a is heated to 230°C.
  • the mixture was extruded into a sheet and laminated on the second surface of the monolayer uniaxially stretched sheet to obtain a three-layer laminated sheet.
  • the three-layer laminated sheet is cooled to 60°C, heated to about 150°C using a tenter oven, stretched 8.5 times in the horizontal direction, and then heated to 160°C for heat treatment.
  • the uniaxially stretched layer of the resin composition a is the back layer, the thickness is 140 ⁇ m, the resin composition (c/a/a) of each layer, the thickness of each layer ( 20 ⁇ m/100 ⁇ m/20 ⁇ m) and the number of stretching axes of each layer (1 axis/2 axes/1 axis)].
  • the surface of the back layer of the laminated resin film is subjected to surface treatment by corona discharge, and the coating solution b is applied to the corona discharge-treated surface side and dried to form a coating layer having a thickness of 0.1 ⁇ m. After drying in an oven for 60 seconds, the recording paper of Example 1 was obtained.
  • Examples 2 to 6, 10, 11 In the same manner as in Example 1, except that resin composition d, e, f, g, h, j, or k for the receiving layer described in Table 2 was used instead of resin composition c, Recording papers of Examples 2 to 6, 10 and 11 were obtained.
  • Example 7 Example 1 except that the resin composition i of the receiving layer described in Table 2 was used instead of the resin composition c in Example 1, the thickness was 170 ⁇ m, and the thickness of each layer was (50 ⁇ m/100 ⁇ m/20 ⁇ m). Recording paper of Example 7 was obtained in the same manner as above.
  • Example 8 A recording paper of Example 8 was obtained in the same manner as in Example 7, except that the thickness was changed to 130 ⁇ m and the thickness of each layer was changed to (10 ⁇ m/100 ⁇ m/20 ⁇ m).
  • Example 9 A recording paper of Example 9 was obtained in the same manner as in Example 7 except that the thickness was changed to 125 ⁇ m and the thickness of each layer was changed to (5 ⁇ m/100 ⁇ m/20 ⁇ m).
  • the resin composition a was melt-kneaded by an extruder set at 230° C., extruded into a sheet shape, and laminated on the first surface of the monolayer uniaxially stretched sheet to obtain a two-layer laminated sheet.
  • the two-layer laminate sheet is cooled to 60°C, heated to about 150°C using a tenter oven, stretched 8.5 times in the horizontal direction, and then heated to 160°C for heat treatment. to obtain a two-layer laminated stretched sheet.
  • the resin composition d After melt-kneading the resin composition d with an extruder set at 230° C., it is extruded into a sheet and laminated on the surface of the layer side composed of the resin composition b of the two-layer laminated stretched sheet, and three layers are laminated. got a sheet.
  • the uniaxially stretched layer of the resin composition a is the back layer, the thickness is 140 ⁇ m, the resin composition (d/b/a) of each layer, the thickness of each layer ( 20 ⁇ m/100 ⁇ m/20 ⁇ m) and the number of stretching axes for each layer (non-stretching/biaxial/uniaxial)] to obtain a laminated resin film.
  • a coating liquid b was prepared using the same method as in Example 1 described above.
  • the surface of the back layer of the laminated resin film is subjected to surface treatment by corona discharge, and the coating solution b is applied to the corona discharge-treated surface side and dried to form a coating layer having a thickness of 0.1 ⁇ m. After drying in an oven for 60 seconds, the recording paper of Example 12 was obtained.
  • Example 13 After melt-kneading the resin composition a described in Table 1 with an extruder set at 230°C, it is supplied to an extrusion die set at 250°C and extruded into a sheet, which is cooled to 60°C by a cooling device. An unstretched sheet was obtained. Next, the resin composition d was melt-kneaded in an extruder set at 230°C, extruded into a sheet and laminated on the first surface of the non-stretched sheet, and at the same time, the plastic resin composition a was set at 230°C.
  • the mixture was extruded into a sheet and laminated on the second surface of the unstretched sheet to obtain a three-layer laminated sheet.
  • the edge portion was slit, and the unstretched layer of the resin composition a was the back layer, the thickness was 120 ⁇ m, the resin composition (d/a/a) of each layer, and the thickness of each layer (20 ⁇ m/80 ⁇ m/20 ⁇ m). , and the number of stretching axes for each layer (unstretched/unstretched/unstretched)].
  • a coating liquid b was prepared using the same method as in Example 1 described above.
  • the surface of the back layer of the laminated resin film is subjected to surface treatment by corona discharge, and the coating solution b is applied to the corona discharge-treated surface side and dried to form a coating layer having a thickness of 0.1 ⁇ m. After drying in an oven for 60 seconds, the recording paper of Example 13 was obtained.
  • the resin composition b was melt-kneaded by an extruder set at 230° C., extruded into a sheet shape and laminated on the first surface of the monolayer uniaxially stretched sheet to obtain a two-layer laminated sheet.
  • 55 parts by weight of water, 20 parts by weight of fine powder silica ["Mizukasil P-78F” manufactured by Mizusawa Chemical Industry Co., Ltd., average particle size 12.5 ⁇ m] and hydrophobic resin (acrylic resin emulsion) [BASF Japan Co., Ltd. ) manufactured by Acronal YJ-2870D, solid concentration 50% by weight] were mixed and dispersed to prepare a coating solution a.
  • One surface of the two-layer laminated sheet obtained above was subjected to surface treatment by corona discharge, and the corona discharge-treated surface side was coated with coating liquid a and dried to form a coating layer with a thickness of 40 ⁇ m. After drying in an oven for 60 seconds, a recording paper of Comparative Example 1 having a thickness of 140 ⁇ m was obtained.
  • Comparative example 2 The resin composition 1 shown in Table 1 was kneaded and rolled for 5 minutes with two 9-inch test rolls (steam heating type manufactured by Nishimura Koki Co., Ltd.) set at 160 ° C. to obtain a vinyl chloride-based resin having a thickness of 140 ⁇ m. A resin sheet was produced (calendering). The obtained vinyl chloride resin sheet was pressed with a 37t hydraulic molding machine (manufactured by Oji Kikai Co., Ltd.) at a temperature of 170° C. with a maximum pressure of 70 kg/cm 2 to mirror-finish the surface to a thickness of 140 ⁇ m. A recording paper of Comparative Example 2 was obtained.
  • Comparative Example 3 In the same manner as in Example 1, except that the resin composition b was used instead of the resin composition c for the receiving layer, and the resin composition b was used instead of the resin composition a for the substrate layer. A recording paper of Comparative Example 3 was obtained.
  • the recording papers of Examples 1 to 13 in which a receiving layer containing a styrene resin was provided on one side of the base layer made of a thermoplastic resin film, had high smoothness. and excellent glossiness, high image density, excellent ink absorption and drying properties, and does not require waterproofing or antifouling treatment even when printed matter is exposed outdoors for a long time. I found out.
  • the recording paper of Comparative Example 1 which was not provided with a receiving layer containing a styrene resin but was provided with a pigment coating layer, was excellent in ink absorption and drying properties, and was able to prevent waviness and blocking.
  • the glossiness and image density are low, and the fixability of the ink is poor. Therefore, when the printed matter is exposed to the outdoors for a long period of time, water-resistant and antifouling treatment is required.
  • the recording paper of Comparative Example 2 provided with a receiving layer containing a vinyl chloride copolymer, not provided with a receiving layer containing a styrene resin, had excellent glossiness and ink absorbency.
  • the recording paper of Comparative Example 3 which was not provided with a receiving layer containing a styrene resin but was provided with a receiving layer containing a propylene homopolymer, was inferior in ink absorption and drying properties, and solvent ink jet printing was used. It was also inferior to appropriateness.
  • the recording paper according to the present invention has both high smoothness and excellent glossiness, high image density, excellent ink absorption and drying properties, and is waterproof and waterproof even when printed matter is exposed outdoors for a long period of time. This recording paper does not require soiling. Therefore, the recording paper according to the present invention is very useful as a sign, label, sign, poster, advertisement, or the like. Moreover, the recording paper according to the present invention is very useful as a recording paper for solvent inkjet using solvent-based ink.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Ink Jet (AREA)

Abstract

La présente invention concerne un papier d'enregistrement qui présente à la fois un lissé élevé et un excellent brillant, qui présente une densité d'image élevée et des propriétés excellentes de capacité d'absorption d'encre et de séchage, et qui ne nécessite pas de traitements d'imperméabilisation ni antisalissures même dans un cas où la matière imprimée est exposée à l'extérieur sur une longue période de temps.　La présente invention fournit un papier d'enregistrement dans lequel une couche de réception contenant une résine à base de styrène est disposée sur l'une des surfaces d'une couche de matériau de base composée d'un film de résine thermoplastique.
PCT/JP2022/015190 2021-03-31 2022-03-28 Papier d'enregistrement Ceased WO2022210605A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58110287A (ja) * 1981-12-24 1983-06-30 Mitsubishi Paper Mills Ltd 記録用シ−ト
JPH07276785A (ja) * 1994-04-08 1995-10-24 Nitto Denko Corp インクジェット記録用受像体及び表面処理方法
JP2002321443A (ja) * 2001-04-25 2002-11-05 Konica Corp インクジェット記録用中間転写媒体、それを用いる画像形成方法及び印刷物

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007152633A (ja) 2005-12-01 2007-06-21 Mitsubishi Paper Mills Ltd 記録用紙
JP2016210155A (ja) 2015-05-13 2016-12-15 大日本印刷株式会社 熱転写受像シートおよびその製造方法
JP2016215467A (ja) 2015-05-19 2016-12-22 キヤノン株式会社 記録媒体
KR102009589B1 (ko) 2015-06-02 2019-08-09 후지필름 가부시키가이샤 수상 시트

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58110287A (ja) * 1981-12-24 1983-06-30 Mitsubishi Paper Mills Ltd 記録用シ−ト
JPH07276785A (ja) * 1994-04-08 1995-10-24 Nitto Denko Corp インクジェット記録用受像体及び表面処理方法
JP2002321443A (ja) * 2001-04-25 2002-11-05 Konica Corp インクジェット記録用中間転写媒体、それを用いる画像形成方法及び印刷物

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