WO2022190860A1 - Papier de base pour papier antiadhésif et papier antiadhésif - Google Patents

Papier de base pour papier antiadhésif et papier antiadhésif Download PDF

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Publication number
WO2022190860A1
WO2022190860A1 PCT/JP2022/007238 JP2022007238W WO2022190860A1 WO 2022190860 A1 WO2022190860 A1 WO 2022190860A1 JP 2022007238 W JP2022007238 W JP 2022007238W WO 2022190860 A1 WO2022190860 A1 WO 2022190860A1
Authority
WO
WIPO (PCT)
Prior art keywords
base paper
paper
adhesive
mass
release
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/JP2022/007238
Other languages
English (en)
Japanese (ja)
Inventor
昌也 登坂
義雄 吉田
侑樹 稲村
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.)
Nippon Paper Industries Co Ltd
Jujo Paper Co Ltd
Original Assignee
Nippon Paper Industries Co Ltd
Jujo Paper 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 Nippon Paper Industries Co Ltd, Jujo Paper Co Ltd filed Critical Nippon Paper Industries Co Ltd
Priority to JP2023505274A priority Critical patent/JP7808082B2/ja
Publication of WO2022190860A1 publication Critical patent/WO2022190860A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • 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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • 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
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes

Definitions

  • the present invention relates to a base paper for release liner used for release liner used for adhesive labels and the like, and a release liner provided with a release agent layer on this base paper for release liner.
  • a release paper is used by attaching it to an adhesive surface of an adhesive label, an adhesive seal, an adhesive tape, etc., in order to protect the adhesive surface and prevent the adhesive surface from being stained, the adhesive strength from being lowered, and the like.
  • the release paper has a release agent layer on the surface in contact with the adhesive surface so that it can be easily peeled off from the adhesive surface.
  • Silicone resins are generally used as release agents, but silicone resins are very expensive.
  • Polyethylene laminated paper is used, which is difficult to remove and has excellent filling properties.
  • polyethylene-laminated paper has a tough polyethylene film formed on the surface of the paper, and is difficult to disintegrate after use, so there is a problem that it is not suitable for recycling.
  • Patent Document 1 the present applicant has a pigment coating layer for suppressing the penetration of a release agent coating liquid such as silicone resin, and uses a base paper mainly composed of wood pulp, so it can be recycled.
  • Patent Document 2 proposes a recyclable base paper for release liner that has a filling layer containing a pigment component and can be evenly coated with a release agent coating solution. .
  • These are base papers for release liner that suppress permeation of the release agent while maintaining disaggregation properties, but further improvement in performance is required.
  • the present invention provides a base paper for a release liner that has excellent filling properties, can form a uniform release agent layer, and is recyclable, and a release liner that has a uniform release agent layer, has releasability, adhesion, and durability.
  • An object of the present invention is to provide a release paper having excellent properties.
  • Means for solving the problems of the present invention are as follows.
  • the filling layer contains a pigment and an adhesive at a mass ratio of 75/25 to 25/75 (pigment/adhesive: dry mass),
  • a starch-based compound and a synthetic resin latex are used in an amount of 80% by mass or more relative to the total amount of the adhesive, and a mass ratio of 90/10 to 50/50 (starch-based compound/synthetic resin latex: dry mass).
  • a base paper for a release liner characterized by having an air resistance (Oken type tester method) of 3000 seconds or more and 20000 seconds or less according to JIS P 8117:2009.
  • the coating amount of the filling layer is 2 g/m 2 or more and 6 g/m 2 or less in terms of dry mass per side.
  • the base paper for the release paper described in . 3. 1.
  • the smoothness of the filling layer measured according to JIS P8155:2010 (Oken tester method) is 50 seconds or more and 300 seconds or less. or 2.
  • the base paper for the release paper described in . 4. 1.
  • the basis weight of the base paper is 30 g/m 2 or more and 80 g/m 2 or less. ⁇ 3.
  • a release liner comprising a release agent layer on the filling layer of the base paper for release liner according to any one of the above. 6.
  • At least a pigment and an adhesive are contained in a mass ratio of 75/25 to 25/75 (pigment/adhesive, dry mass), and as the adhesive, a starch-based compound and a synthetic resin latex are added to the total amount of the adhesive. 80% by mass or more, and a mass ratio of 90/10 to 50/50 (starch-based compound/synthetic resin latex, dry mass).
  • a method for producing a base paper for release paper characterized by:
  • the base paper for release liner of the present invention can prevent penetration of the release agent, and by providing a release agent layer on the filling layer, it is possible to obtain a release liner with excellent adhesion, releasability and durability. can be done.
  • the base paper for release liner of the present invention has sufficient sealing properties even when the coating amount of the sealing layer is at least. In particular, when the coating liquid for the filling layer is applied by an on-machine coater, even when the coating amount of the filling layer is small, it is possible to form a uniform release agent layer with excellent filling properties.
  • the base paper for release paper of the present invention comprises a base paper and a filler layer on at least one surface of the base paper,
  • the filling layer contains a pigment and an adhesive at a mass ratio of 75/25 to 25/75 (pigment/adhesive: dry mass),
  • a starch-based compound and a synthetic resin latex are added at a mass ratio of 80% by mass or more relative to the total amount of the adhesive and from 90/10 to 50/50 (starch-based compound/synthetic resin latex: dry mass).
  • a to B (A and B are numbers)" means a numerical range including the values of A and B, that is, from A to B and below.
  • the base paper is a sheet composed of papermaking fibers, fillers, various auxiliary agents, and the like. It is preferable to use wood pulp as the papermaking fiber. Wood pulps include chemical pulps such as softwood kraft pulp, hardwood kraft pulp, and sulfite pulp; mechanical pulps such as thermomechanical pulp, stone grind pulp, and refiner grind pulp; Recycled pulp and the like can be mentioned, and these wood pulps can be used singly or in combination of two or more. In addition, if necessary, one or two or more of non-wood pulps such as kenaf, hemp and bamboo, and fiber materials other than cellulose fibers such as glass fibers and polyethylene fibers may be blended.
  • wood pulps include chemical pulps such as softwood kraft pulp, hardwood kraft pulp, and sulfite pulp; mechanical pulps such as thermomechanical pulp, stone grind pulp, and refiner grind pulp; Recycled pulp and the like can be mentioned, and these wood pulps can be used singly or in combination of two or more.
  • non-wood pulps such
  • the freeness (Canadian Standard Freeness: CSF) of the papermaking fibers is preferably 500 ml or less, more preferably 450 ml or less.
  • the base paper of the present invention can contain fillers.
  • known fillers such as white carbon, talc, kaolin, clay, heavy calcium carbonate, light calcium carbonate, titanium oxide, zeolite and synthetic resin fillers can be used.
  • the filler is an optional component, and it is also possible to contain no filler. Adding fillers improves the smoothness, opacity, and whiteness of the base paper. to determine the amount of filler compounded.
  • the filler content in the base paper is preferably 20% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less.
  • Auxiliaries include aluminum sulfate, various anionic, cationic, nonionic, or amphoteric retention improvers, drainage improvers, paper strength agents, and internal sizing agents for papermaking. can be used accordingly. Furthermore, dyes, fluorescent whitening agents, pH adjusters, antifoaming agents, pitch control agents, slime control agents and the like can be added as necessary.
  • the method for producing the base paper is not particularly limited, and papermaking is performed by acid papermaking, neutral papermaking, or alkaline papermaking methods using known fourdrinier formers, on-top hybrid formers, gap former machines, or the like.
  • the base paper can be produced by Further, the base paper may be composed of one layer, or may be composed of multiple layers of two or more layers.
  • the surface of the base paper is treated with various chemicals.
  • agents used include polyacrylamide, polyvinyl alcohol, surface sizing agents, waterproofing agents, water retention agents, thickeners, lubricants, and the like, and these agents are used singly or in combination of two or more. be able to.
  • the method of surface treatment of the base paper is not particularly limited, but known coating devices such as a rod metering size press, a pound size press, a gate roll coater, a spray coater, a blade coater and a curtain coater can be used. can.
  • the basis weight of the base paper is not particularly limited, it is preferably 30 g/m 2 or more and 80 g/m 2 or less, more preferably 40 g/m 2 or more and 70 g/m 2 or less.
  • the filling layer is provided on at least one side of the base paper, and can be provided on both sides.
  • the filler layer contains a pigment and an adhesive at a mass ratio of 75/25 to 25/75 (pigment/adhesive, dry mass), and the starch-based compound and synthetic resin latex are added to the total amount of the adhesive. It is contained in a mass ratio of 80% by mass or more and a mass ratio of 90/10 to 50/50 (starch-based compound/synthetic resin latex, dry mass).
  • the base paper for the release liner of the present invention has good sealing properties because the filling layer satisfies this formulation. , it can be a release paper with excellent durability.
  • the filling layer contains CNF, MFC, dispersant, water resistance agent, lubricant, antifoaming agent, thickener, water retention agent, cross-linking agent, surfactant, preservative, as long as it does not impair the effects of the present invention.
  • Various auxiliaries such as agents, dyes, and fluorescent dyes can also be contained.
  • Pigment Pigments are not particularly limited, and pigments commonly used in papermaking can be used.
  • kaolin engineered kaolin, clay, delaminated clay, ground calcium carbonate, light calcium carbonate, talc, titanium dioxide, aluminum hydroxide, mica, illite, barium sulfate, calcium sulfate, zinc oxide, silicic acid, silicates.
  • colloidal silica satin white, etc., and solid-type, hollow-type, or core-shell-type organic pigments.
  • the pigment preferably has a 50% volume average particle diameter (D50, median diameter) measured by a laser diffraction/scattering method of 2.0 ⁇ m or more and 7.0 ⁇ m or less.
  • D50 is more preferably 3.0 ⁇ m or more. Moreover, it is more preferably 5.0 ⁇ m or less.
  • the D50 of the pigment is less than 2.0 ⁇ m, although the effect of filling the voids between the fibers on the surface of the base paper can be obtained, the resin latex cannot sufficiently adhere the pigments, resulting in many fine voids.
  • the uniformity of the release agent layer may be reduced due to the deterioration of filling properties.
  • examples of the measurement apparatus for the laser diffraction/scattering method include a particle size distribution measuring apparatus "Partica” manufactured by Horiba Ltd., and a particle size distribution measuring apparatus “MASTER SIZERS” manufactured by Malvern.
  • the adhesive contains at least a starch-based compound and a synthetic resin latex.
  • the adhesive may contain other adhesives as long as the effects of the present invention are not impaired.
  • Other adhesives include, for example, polyvinyl alcohols such as fully saponified polyvinyl alcohol, partially saponified polyvinyl alcohol and ethylene-copolymerized polyvinyl alcohol; proteins such as casein, soybean protein and synthetic protein; Cellulose derivatives such as hydroxyethyl cellulose, water-soluble resins such as polyvinylpyrrolidone and sodium alginate, and the like are included.
  • Starch compounds include starch, oxidized starch, hydroxyesterified starch (HES), phosphate ester starch, esterified starch, cationized starch, urea phosphate esterified starch, and other starches, and those obtained by hydrolyzing starch. Dextrin and the like can be used.
  • the synthetic resin latex is not particularly limited, and may be a styrene/butadiene copolymer, a styrene/acrylic copolymer, an ethylene/vinyl acetate copolymer, a butadiene/methyl methacrylate copolymer, or a vinyl acetate/butyl acrylate.
  • Latexes of various copolymers such as copolymers, maleic anhydride copolymers, and acrylic acid/methyl methacrylate copolymers can be used, and one or more of them can be used in combination. can.
  • the synthetic resin latex preferably has an average particle size of 100 ⁇ m or more, more preferably 150 ⁇ m or more, as measured by a dynamic light scattering method (photon correlation method).
  • a dynamic light scattering method photon correlation method
  • photon correlation method for example, "FPAR-1000" manufactured by Otsuka Electronics Co., Ltd. can be exemplified.
  • the glass transition temperature (Tg) of the synthetic resin latex is preferably -20°C or higher and 30°C or lower. If the Tg of the synthetic resin latex is lower than ⁇ 20° C., the filler layer becomes too soft and easily scratched, and the uniformity of the release agent layer provided on the filler layer may deteriorate. If the Tg exceeds 30° C., the uniformity of the filler layer may deteriorate, and the uniformity of the release agent layer provided on the filler layer may also deteriorate. The Tg of the synthetic resin latex was measured by pretreating the synthetic resin latex at 130° C.
  • Tg Tg1 ⁇ 1+Tg2 ⁇ 2+ . . . +Tgn ⁇ n Tg1, Tg2 ... Tgn: Glass transition temperature (K) of each composition alone measured ⁇ 1, ⁇ 2 ... ⁇ n: mass fraction (%) of each composition alone with respect to the total resin mass
  • the mass ratio of the pigment and the adhesive is preferably 70/30 to 30/70, more preferably 60/40 to 40/60.
  • the total proportion of the starch-based compound and the synthetic resin latex to the total amount of the adhesive is preferably 85% by mass or more, more preferably 90% by mass or more.
  • the mass ratio of the starch-based compound to the synthetic resin latex is preferably 80/20 to 55/45.
  • the method of coating the filling layer is not particularly limited, and the coating can be performed using a known coating apparatus and coating system.
  • coating equipment include blade coaters, bar coaters, roll coaters, air knife coaters, reverse roll coaters, curtain coaters, gravure coaters, spray coaters, size press coaters and gate roll coaters.
  • coating system water-based coating using water as a main medium is preferable.
  • the coating is preferably performed by an on-machine coater in which a paper machine and a coating device are integrated.
  • the filling layer of the present invention has high uniformity and good filling properties even when the coating amount is small, it is easy to satisfy the desired performance even when coated with an on-machine coater.
  • a steam heating heater for example, a gas heater, an infrared heater, an electric heater, a hot air heating heater, a microwave, a cylinder dryer or the like is used.
  • the coating amount of the filling layer is preferably 2 g/m 2 or more and 6 g/m 2 or less in terms of dry mass per side. If the coating amount is less than 2 g/m 2 , it may be difficult for the filler layer to be obtained to prevent permeation of the release agent layer coating liquid. On the other hand, even if this coating amount exceeds 6 g/m 2 , the filling property is hardly improved, resulting in high cost.
  • the coating amount of the filling layer is more preferably 3 g/m 2 or more, more preferably 4 g/m 2 or more in terms of dry mass per side. Further, the coating amount of the filling layer is more preferably 5 g/m 2 or less in terms of dry mass per side.
  • the air permeability resistance (Oken tester method) specified in JIS P 8117:2009 of the surface having the filling layer is 3,000 seconds or more and 20,000 seconds or less. be.
  • the air resistance (Oken type testing machine method) is within the above range, the release agent can be uniformly applied, and the adhesion and release properties when used as a release paper are excellent. Excellent disaggregation. More preferably, the air resistance (Oken test method) is 5,000 seconds or more and 15,000 seconds or less.
  • the surface having the filler layer has a smoothness measured according to JIS P8155:2010 (Oken tester method) of preferably 50 seconds or more and 300 seconds or less. Seconds or more and 280 seconds or less are more preferable.
  • a release liner can be produced by coating a release agent on the filling layer of the base paper for release liner of the present invention to form a release agent layer.
  • a release agent materials such as silicone resins, fluorine compounds, aminoalkyd compounds, polyester compounds, and the like, which have low surface energy and weak adhesion to adhesives, can be used without particular limitation.
  • the silicone resin used as the release agent include solvent-free silicone resins, solvent-based silicone resins, water-based emulsion silicone resins, and solvent-free UV curable silicone resins.
  • the coating method of the release agent is not particularly limited, and coating can be performed using a known coating apparatus and coating system.
  • coating equipment include blade coaters, bar coaters, roll coaters, air knife coaters, reverse roll coaters, curtain coaters, gravure coaters, spray coaters, size press coaters and gate roll coaters.
  • a steam heating heater, a gas heater, an infrared heater, an electric heater, a hot air heating heater, a microwave, a cylinder drier or the like can be used.
  • the coating amount of the release agent layer is preferably 0.2 g/m 2 or more and 3.0 g/m 2 or less in terms of dry mass per side. If the coating amount is less than 0.2 g/m 2 , it becomes difficult to obtain a uniform release agent layer. On the other hand, even if this coating amount exceeds 3.0 g/m 2 , the peelability is hardly improved and the effect is saturated. More preferably, the coating amount of the release agent layer is 0.3 g/m 2 or more and 2.0 g/m 2 or less in terms of dry mass per side. More preferably, the coating amount of the release agent layer is 0.4 g/m 2 or more in terms of dry mass per side. Further, it is more preferable that the coating amount of the release agent layer is 1.2 g/m 2 or less in terms of dry mass per side.
  • the base paper for release liner of the present invention has a highly uniform filling layer and good sealing properties, and a uniform release agent layer can be formed on this filling layer.
  • the 50% volume average particle size (D50) of the pigments used in the examples measured by the laser diffraction/scattering method, the quality of the base paper for release liner, and the quality of the release liner were measured and evaluated by the following methods.
  • Air resistance (Oken type tester method) It was measured by a method (Oken test method) according to JIS P 8117:2009.
  • Smoothness (Oken type testing machine method) Based on JIS P8155:2010, the surface of the filling layer was measured using an Oken type smoothness meter (manufactured by Asahi Seiko Co., Ltd.: KY-5).
  • Disaggregation A base paper for release paper having an absolute dry weight of 40 g was immersed in 2 L of water and disaggregated for 60 minutes with a pulp disaggregation tester (manufactured by Kumagai Riki Kogyo Co., Ltd., conforming to JIS P 8220).
  • the degree of disaggregation into the aqueous solution was visually observed and evaluated according to the following three grades.
  • ⁇ Pulp fibers are dispersed, and the disaggregation property is good.
  • ⁇ Slight binding of pulp fibers remains, but disaggregation is generally good.
  • x Lumps of pulp fibers and bundles of pulp fibers remain, and the disaggregation property is poor.
  • Example 1 Preparation of coating solution for filling layer 50 parts by mass of kaolin (manufactured by Imerys: KCS, D50: 4.6 ⁇ m) as a pigment, 30 parts by mass of oxidized starch (manufactured by Nihon Shokuhin Kako Co., Ltd.: MS#3800) as a starch compound, and styrene as a synthetic resin latex.
  • kaolin manufactured by Imerys: KCS, D50: 4.6 ⁇ m
  • oxidized starch manufactured by Nihon Shokuhin Kako Co., Ltd.: MS#3800
  • Preparation of base paper 100 parts by mass of hardwood kraft pulp (LBKP) having a Canadian standard freeness (CSF) of 300 ml was used as raw material pulp.
  • LKP hardwood kraft pulp
  • CSF Canadian standard freeness
  • a paper strength agent 0.3 parts by mass of cationized starch is added to 100 parts by mass of the raw material pulp, and then 1.5 parts by mass of aluminum sulfate is added, and paper is made using a fourdrinier multi-cylinder paper machine. to obtain a base paper having a basis weight of 56 g/m 2 .
  • the coating liquid for the filler layer is applied using an on-machine blade coater so that the coating amount is 4.0 g / m 2 in terms of dry mass, and dried to form a release paper. I got the original paper.
  • Example 2 A base paper for a release liner was obtained in the same manner as in Example 1, except that 70 parts by mass of kaolin, 20 parts by mass of a starch-based compound, and 10 parts by mass of a synthetic resin latex in the coating liquid for the filling layer were used. .
  • Example 3 A base paper for release liner was obtained in the same manner as in Example 1, except that 30 parts by mass of kaolin and 50 parts by mass of the starch-based compound in the filling layer coating solution were used.
  • Example 4 A base paper for a release liner was obtained in the same manner as in Example 1, except that 45 parts by mass of the starch-based compound and 5 parts by mass of the synthetic resin latex in the coating solution for the filling layer were used.
  • Example 5 A base paper for a release liner was obtained in the same manner as in Example 1, except that 25 parts by mass of the starch-based compound and 25 parts by mass of the synthetic resin latex in the coating solution for the filling layer were used.
  • Example 1 A base paper for release liner was obtained in the same manner as in Example 1, except that the amount of kaolin in the coating solution for filling layer was changed to 20 parts by mass and the amount of the starch-based compound was changed to 60 parts by mass.
  • Comparative Example 2 A base paper for a release liner was obtained in the same manner as in Example 1, except that 80 parts by mass of kaolin, 10 parts by mass of a starch-based compound, and 10 parts by mass of a synthetic resin latex were used in the coating liquid for the filling layer. .
  • Example 3 A base paper for a release liner was obtained in the same manner as in Example 1, except that the starch-based compound and the synthetic resin latex in the filling layer coating liquid were changed to 46 parts by mass and 4 parts by mass to the synthetic resin latex.
  • Comparative Example 4 A base paper for a release liner was obtained in the same manner as in Example 1 except that the starch-based compound and the synthetic resin latex in the filling layer coating liquid were changed to 20 parts by mass and 30 parts by mass to the synthetic resin latex.
  • Base paper for release paper was prepared in the same manner as in Example 1, except that 20 parts by mass of the synthetic resin latex in the coating solution for the filling layer was changed to 20 parts by mass of completely saponified polyvinyl alcohol (manufactured by Kuraray Co., Ltd.: PVA117). Obtained.
  • Base paper for release liner was obtained in the same manner as in Example 1, except that the coating liquid for filling layer was applied so that the coating amount was 8 g/m 2 in terms of dry mass and dried.
  • release paper A release agent layer coating solution was applied to the filler layer of the base paper for release paper using an RI printer so that the coating amount was 1.0 g/m 2 in terms of dry mass, and then dried. A curing treatment (130° C., 30 seconds) was performed using a machine to obtain a release paper.
  • Table 1 shows the evaluation results of the base paper for release liner and release liner obtained in each example and comparative example.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Paper (AREA)

Abstract

La présente invention aborde le problème de la réalisation d'un papier de base recyclable pour un papier antiadhésif, ayant d'excellentes propriétés de remplissage et capable de former une couche d'agent antiadhésif uniforme ; et un papier antiadhésif ayant une couche d'agent antiadhésif uniforme et possédant d'excellentes propriétés de détachement, d'adhérence et de durabilité. La solution selon l'invention porte sur un papier de base pour un papier antiadhésif, le papier de base comprenant : une feuille de base ; et une couche de charge sur au moins une surface de la feuille de base. La couche de charge contient un pigment et un adhésif dans un rapport massique (pigment/adhésif ; masse sèche) de 75/25-25/75. En tant qu'adhésif, un composé à base d'amidon et un latex de résine synthétique sont contenus dans 80 % en masse par rapport à la quantité totale d'adhésif et sont contenus dans un rapport massique (composé à base d'amidon/latex de résine synthétique ; masse sèche) de 90/10 à 50/50. Le papier de base a une imperméabilité basée sur JIS P 8117:2009 (procédé d'essai Oken) de 3 000 à 20000 secondes.
PCT/JP2022/007238 2021-03-09 2022-02-22 Papier de base pour papier antiadhésif et papier antiadhésif Ceased WO2022190860A1 (fr)

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JP2023505274A JP7808082B2 (ja) 2021-03-09 2022-02-22 剥離紙用原紙、及び剥離紙

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JP2021-037476 2021-03-09
JP2021037476 2021-03-09

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023023121A (ja) * 2021-08-04 2023-02-16 リンテック株式会社 剥離紙原紙、剥離紙、粘着ラベルおよび剥離紙の製造方法
WO2026028640A1 (fr) * 2024-08-02 2026-02-05 日本製紙株式会社 Papier de base pour papier antiadhésif, et papier antiadhésif
WO2026028777A1 (fr) * 2024-08-02 2026-02-05 日本製紙株式会社 Papier de base pour papier antiadhésif, et papier antiadhésif

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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