WO2022190860A1 - Base paper for release paper and release paper - Google Patents
Base paper for release paper and release paper Download PDFInfo
- 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
Links
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 55
- 239000000853 adhesive Substances 0.000 claims abstract description 47
- 230000001070 adhesive effect Effects 0.000 claims abstract description 47
- 239000004816 latex Substances 0.000 claims abstract description 37
- 229920000126 latex Polymers 0.000 claims abstract description 37
- 229920002472 Starch Polymers 0.000 claims abstract description 35
- 235000019698 starch Nutrition 0.000 claims abstract description 35
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 35
- 239000000057 synthetic resin Substances 0.000 claims abstract description 35
- 239000008107 starch Substances 0.000 claims abstract description 34
- 150000001875 compounds Chemical class 0.000 claims abstract description 30
- 239000000945 filler Substances 0.000 claims abstract description 28
- 239000000049 pigment Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000000576 coating method Methods 0.000 claims description 65
- 239000011248 coating agent Substances 0.000 claims description 64
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000123 paper Substances 0.000 description 101
- 239000010410 layer Substances 0.000 description 86
- 239000000243 solution Substances 0.000 description 13
- 229920002050 silicone resin Polymers 0.000 description 12
- 239000000835 fiber Substances 0.000 description 10
- 239000005995 Aluminium silicate Substances 0.000 description 9
- 235000012211 aluminium silicate Nutrition 0.000 description 9
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 229920001131 Pulp (paper) Polymers 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 229920001577 copolymer Polymers 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 description 6
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 6
- -1 Polyethylene Polymers 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002655 kraft paper Substances 0.000 description 4
- 238000007561 laser diffraction method Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000000790 scattering method Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 229920006319 cationized starch Polymers 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 238000002296 dynamic light scattering Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- 239000011121 hardwood Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000001254 oxidized starch Substances 0.000 description 2
- 235000013808 oxidized starch Nutrition 0.000 description 2
- 239000013054 paper strength agent Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 238000013441 quality evaluation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 102000011632 Caseins Human genes 0.000 description 1
- 108010076119 Caseins Proteins 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- 108010073771 Soybean Proteins Proteins 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- DZHMRSPXDUUJER-UHFFFAOYSA-N [amino(hydroxy)methylidene]azanium;dihydrogen phosphate Chemical compound NC(N)=O.OP(O)(O)=O DZHMRSPXDUUJER-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 239000006081 fluorescent whitening agent Substances 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 229910052900 illite Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920002589 poly(vinylethylene) polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000728 polyester Chemical class 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 235000019710 soybean protein Nutrition 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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.
Abstract
The present invention addresses the problem of providing: a recyclable base paper for a release paper, excellent in filling properties and capable of forming a uniform release agent layer; and a release paper having a uniform release agent layer and being excellent in detachability, adhesion and durability. To solve this problem, provided is a base paper for a release paper, the base paper including: a base sheet; and a filler layer on at least one surface of the base sheet. The filler layer contains a pigment and an adhesive in a mass ratio (pigment/adhesive; dry mass) of 75/25-25/75. As the adhesive, a starch-based compound and a synthetic resin latex are contained in 80 mass% with respect to the total amount of adhesive and are contained in a mass ratio (starch-based compound/synthetic resin latex; dry mass) of 90/10-50/50. The base paper has an impermeability based on JIS P 8117:2009 (Oken Tester Method) of 3000-20000 seconds.
Description
本発明は、粘着ラベル等に使用する剥離紙に用いられる剥離紙用原紙と、この剥離紙用原紙に剥離剤層を設けた剥離紙に関する。
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.
剥離紙は、粘着ラベル、粘着シール、粘着テープ等において、粘着面を保護し、粘着面の汚れ、粘着力の低下等を防ぐために、粘着面に貼付して用いられる。剥離紙は、粘着面から容易に剥離できるように、粘着面と接する表面に剥離剤層を有する。
剥離剤としては、一般的にシリコーン樹脂が用いられているが、シリコーン樹脂は非常に高価であるため、少量で剥離剤層を形成できるように、剥離紙用原紙としてシリコーン樹脂塗工液が浸透し難い、目止め性に優れたポリエチレンラミネート紙が用いられている。
しかし、ポリエチレンラミネート紙は、紙表面に強靭なポリエチレンの皮膜が形成されており、使用後に離解することが困難であるため、リサイクルに適していないという問題があった。 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.
However, 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.
剥離剤としては、一般的にシリコーン樹脂が用いられているが、シリコーン樹脂は非常に高価であるため、少量で剥離剤層を形成できるように、剥離紙用原紙としてシリコーン樹脂塗工液が浸透し難い、目止め性に優れたポリエチレンラミネート紙が用いられている。
しかし、ポリエチレンラミネート紙は、紙表面に強靭なポリエチレンの皮膜が形成されており、使用後に離解することが困難であるため、リサイクルに適していないという問題があった。 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.
However, 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.
本出願人は、特許文献１において、シリコーン樹脂等の剥離剤塗工液の浸透を抑えるための顔料塗工層を有し、木材パルプを主体とする基紙を用いていることからリサイクルが可能な剥離紙用原紙を、さらに、特許文献２において、顔料成分を含有する目止め層を備え、剥離剤塗工液を均一に塗工できる、リサイクルが可能な剥離紙用原紙を提案している。
これらは、離解性を保ちながらも、剥離剤の浸み込みを抑えた剥離紙用原紙であるが、さらなる性能向上が求められている。 In 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. In addition, 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.
これらは、離解性を保ちながらも、剥離剤の浸み込みを抑えた剥離紙用原紙であるが、さらなる性能向上が求められている。 In 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. In addition, 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.
本発明は、目止め性に優れ、均一な剥離剤層を形成することができ、かつ、リサイクルが可能な剥離紙用原紙と、均一な剥離剤層を有し、剥離性、密着性、耐久性に優れた剥離紙を提供することを課題とする。
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.
本発明の課題を解決するための手段は以下の通りである。
１．基紙と、前記基紙の少なくとも一方の面に目止め層を備え、
前記目止め層が、顔料と接着剤とを７５／２５～２５／７５の質量比（顔料／接着剤：乾燥質量）で含有し、
前記接着剤として、澱粉系化合物と合成樹脂ラテックスとを、接着剤全量に対して８０質量％以上、かつ、９０／１０～５０／５０の質量比（澱粉系化合物／合成樹脂ラテックス：乾燥質量）で含有し、
ＪＩＳ Ｐ ８１１７：２００９に準拠した透気抵抗度（王研式試験機法）が３０００秒以上２００００秒以下であることを特徴とする剥離紙用原紙。
２．前記目止め層の塗工量が、片面当たり乾燥質量で２ｇ／ｍ２以上６ｇ／ｍ２以下であることを特徴とする１．に記載の剥離紙用原紙。
３．前記目止め層のＪＩＳ Ｐ８１５５：２０１０に基づいて測定した平滑度（王研式試験機法）が、５０秒以上３００秒以下であることを特徴とする１．または２．に記載の剥離紙用原紙。
４．前記基紙の坪量が、３０ｇ／ｍ２以上８０ｇ／ｍ２以下であることを特徴とする１．～３．のいずれかに記載の剥離紙用原紙。
５．１．～４．のいずれかに記載された剥離紙用原紙の前記目止め層上に剥離剤層を有することを特徴とする剥離紙。
６．基紙の少なくとも一方の面に、
少なくとも顔料と接着剤とを７５／２５～２５／７５の質量比（顔料／接着剤、乾燥質量）で含有し、前記接着剤として、澱粉系化合物と合成樹脂ラテックスとを、接着剤全量に対して８０質量％以上、かつ、９０／１０～５０／５０の質量比（澱粉系化合物／合成樹脂ラテックス、乾燥質量）で含有する目止め層用塗工液を、オンマシンコーターで塗工することを特徴とする剥離紙用原紙の製造方法。 Means for solving the problems of the present invention are as follows.
1. 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),
As the adhesive, 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). contains with
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.
2. 1. 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. Base paper for release paper according to any one of
5.1. ~ 4. 2. 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. on at least one side of the base paper,
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:
１．基紙と、前記基紙の少なくとも一方の面に目止め層を備え、
前記目止め層が、顔料と接着剤とを７５／２５～２５／７５の質量比（顔料／接着剤：乾燥質量）で含有し、
前記接着剤として、澱粉系化合物と合成樹脂ラテックスとを、接着剤全量に対して８０質量％以上、かつ、９０／１０～５０／５０の質量比（澱粉系化合物／合成樹脂ラテックス：乾燥質量）で含有し、
ＪＩＳ Ｐ ８１１７：２００９に準拠した透気抵抗度（王研式試験機法）が３０００秒以上２００００秒以下であることを特徴とする剥離紙用原紙。
２．前記目止め層の塗工量が、片面当たり乾燥質量で２ｇ／ｍ２以上６ｇ／ｍ２以下であることを特徴とする１．に記載の剥離紙用原紙。
３．前記目止め層のＪＩＳ Ｐ８１５５：２０１０に基づいて測定した平滑度（王研式試験機法）が、５０秒以上３００秒以下であることを特徴とする１．または２．に記載の剥離紙用原紙。
４．前記基紙の坪量が、３０ｇ／ｍ２以上８０ｇ／ｍ２以下であることを特徴とする１．～３．のいずれかに記載の剥離紙用原紙。
５．１．～４．のいずれかに記載された剥離紙用原紙の前記目止め層上に剥離剤層を有することを特徴とする剥離紙。
６．基紙の少なくとも一方の面に、
少なくとも顔料と接着剤とを７５／２５～２５／７５の質量比（顔料／接着剤、乾燥質量）で含有し、前記接着剤として、澱粉系化合物と合成樹脂ラテックスとを、接着剤全量に対して８０質量％以上、かつ、９０／１０～５０／５０の質量比（澱粉系化合物／合成樹脂ラテックス、乾燥質量）で含有する目止め層用塗工液を、オンマシンコーターで塗工することを特徴とする剥離紙用原紙の製造方法。 Means for solving the problems of the present invention are as follows.
1. 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),
As the adhesive, 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). contains with
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.
2. 1. 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. Base paper for release paper according to any one of
5.1. ~ 4. 2. 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. on at least one side of the base paper,
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:
本発明の剥離紙用原紙は、剥離剤の浸み込みを防ぐことができ、目止め層上に剥離剤層を設けることにより、密着性、剥離性、耐久性に優れた剥離紙を得ることができる。本発明の剥離紙用原紙は、目止め層の塗工量が少なくとも、十分な目止め性を備えている。特に、オンマシンコーターにより目止め層用塗工液を塗工する場合において、目止め層の塗工量が少ない場合でも、目止め性に優れ、均一な剥離剤層を形成することができる。
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.
本発明の剥離紙用原紙は、基紙と、前記基紙の少なくとも一方の面に目止め層を備え、
前記目止め層が、顔料と接着剤とを７５／２５～２５／７５の質量比（顔料／接着剤：乾燥質量）で含有し、
接着剤として、澱粉系化合物と合成樹脂ラテックスとを、接着剤全量に対して８０質量％以上、かつ、９０／１０～５０／５０の質量比（澱粉系化合物／合成樹脂ラテックス：乾燥質量）で含有し、
ＪＩＳ Ｐ ８１１７：２００９に準拠した透気抵抗度（王研式試験機法）が３０００秒以上２００００秒以下であることを特徴とする。
なお、本明細書において、「Ａ～Ｂ（Ａ、Ｂは数字）」との記載は、Ａ、Ｂの値を含む数値範囲、すなわち、Ａ以上Ｂ以下を意味する。 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),
As an adhesive, 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). contains,
It is characterized by having an air permeability resistance (Oken test method) in accordance with JIS P 8117:2009 of 3000 seconds or more and 20000 seconds or less.
In this specification, the description "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.
前記目止め層が、顔料と接着剤とを７５／２５～２５／７５の質量比（顔料／接着剤：乾燥質量）で含有し、
接着剤として、澱粉系化合物と合成樹脂ラテックスとを、接着剤全量に対して８０質量％以上、かつ、９０／１０～５０／５０の質量比（澱粉系化合物／合成樹脂ラテックス：乾燥質量）で含有し、
ＪＩＳ Ｐ ８１１７：２００９に準拠した透気抵抗度（王研式試験機法）が３０００秒以上２００００秒以下であることを特徴とする。
なお、本明細書において、「Ａ～Ｂ（Ａ、Ｂは数字）」との記載は、Ａ、Ｂの値を含む数値範囲、すなわち、Ａ以上Ｂ以下を意味する。 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),
As an adhesive, 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). contains,
It is characterized by having an air permeability resistance (Oken test method) in accordance with JIS P 8117:2009 of 3000 seconds or more and 20000 seconds or less.
In this specification, the description "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.
「基紙」
本発明において基紙とは、製紙用繊維、填料、各種助剤等からなるシートである。製紙用繊維は、木材パルプを用いることが好ましい。木材パルプとしては、針葉樹クラフトパルプ、広葉樹クラフトパルプ、サルファイトパルプ等の化学パルプ、サーモメカニカルパルプ、ストーングラインドパルプ、リファイナーグラインドパルプ等の機械パルプ、及び、新聞紙、コート紙、上質紙等から得られる再生パルプ等が挙げられ、これらの木材パルプを１種または２種以上組み合わせて用いることができる。また、必要に応じてケナフ、麻、竹等の非木材パルプ、ガラス繊維、ポリエチレン繊維等のセルロース繊維以外の繊維材料を１種または２種以上配合することができる。
得られる基紙に目止め層用塗工液が浸透しにくくなり緻密な目止め層を形成することができるため、針葉樹クラフトパルプを用いることが好ましい。また、製紙用繊維の濾水度を低くすることが好ましい。具体的には、製紙用繊維の濾水度（カナダ式標準ろ水度：ＣＳＦ）は、５００ｍｌ以下であることが好ましく、４５０ｍｌ以下であることがより好ましい。 "base paper"
In the present invention, 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.
It is preferable to use soft wood kraft pulp because it is difficult for the coating solution for the filler layer to permeate into the resulting base paper and a dense filler layer can be formed. It is also preferable to lower the freeness of the papermaking fibers. Specifically, the freeness (Canadian Standard Freeness: CSF) of the papermaking fibers is preferably 500 ml or less, more preferably 450 ml or less.
本発明において基紙とは、製紙用繊維、填料、各種助剤等からなるシートである。製紙用繊維は、木材パルプを用いることが好ましい。木材パルプとしては、針葉樹クラフトパルプ、広葉樹クラフトパルプ、サルファイトパルプ等の化学パルプ、サーモメカニカルパルプ、ストーングラインドパルプ、リファイナーグラインドパルプ等の機械パルプ、及び、新聞紙、コート紙、上質紙等から得られる再生パルプ等が挙げられ、これらの木材パルプを１種または２種以上組み合わせて用いることができる。また、必要に応じてケナフ、麻、竹等の非木材パルプ、ガラス繊維、ポリエチレン繊維等のセルロース繊維以外の繊維材料を１種または２種以上配合することができる。
得られる基紙に目止め層用塗工液が浸透しにくくなり緻密な目止め層を形成することができるため、針葉樹クラフトパルプを用いることが好ましい。また、製紙用繊維の濾水度を低くすることが好ましい。具体的には、製紙用繊維の濾水度（カナダ式標準ろ水度：ＣＳＦ）は、５００ｍｌ以下であることが好ましく、４５０ｍｌ以下であることがより好ましい。 "base paper"
In the present invention, 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.
It is preferable to use soft wood kraft pulp because it is difficult for the coating solution for the filler layer to permeate into the resulting base paper and a dense filler layer can be formed. It is also preferable to lower the freeness of the papermaking fibers. Specifically, the freeness (Canadian Standard Freeness: CSF) of the papermaking fibers is preferably 500 ml or less, more preferably 450 ml or less.
本発明の基紙は、填料を含有することができる。填料としては、ホワイトカーボン、タルク、カオリン、クレー、重質炭酸カルシウム、軽質炭酸カルシウム、酸化チタン、ゼオライト、合成樹脂填料等の公知の填料を使用することができる。本発明において、填料は任意成分であり、填料を含有しないこともできる。填料を配合することにより、基紙の平滑性、不透明度、白色度等が向上するが、得られる基紙に目止め層用塗工液が浸透しやすくなるため、これらの特性を考慮した上で填料の配合量を決定する。基紙中の填料の含有率は、２０質量％以下であることが好ましく、１０質量％以下であることがより好ましく、５質量％以下であることがさらに好ましい。
The base paper of the present invention can contain fillers. As the filler, 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. In the present invention, 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.
助剤としては、硫酸バンドや各種のアニオン性、カチオン性、ノニオン性あるいは、両性の歩留まり向上剤、濾水性向上剤、紙力増強剤や内添サイズ剤等の抄紙用内添助剤を必要に応じて使用することができる。さらに、染料、蛍光増白剤、ｐＨ調整剤、消泡剤、ピッチコントロール剤、スライムコントロール剤等も必要に応じて添加することができる。
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.
基紙の製造（抄紙）方法は特に限定されるものではなく、公知の長網フォーマー、オントップハイブリッドフォーマー、ギャップフォーマーマシン等を用いて、酸性抄紙、中性抄紙、アルカリ抄紙方式で抄紙して基紙を製造することができる。また、基紙は１層であってもよく、２層以上の多層で構成されていてもよい。
The method for producing the base paper (papermaking) 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.
さらに、基紙の表面を各種薬剤で処理することが可能である。使用される薬剤としては、ポリアクリルアミド、ポリビニルアルコール、表面サイズ剤、耐水化剤、保水剤、増粘剤、滑剤などを例示することができ、これらを１種または２種類以上を混合して用いることができる。
基紙の表面処理の方法は特に限定されるものではないが、ロッドメタリングサイズプレス、ポンド式サイズプレス、ゲートロールコーター、スプレーコーター、ブレードコーター、カーテンコーターなど公知の塗工装置を用いることができる。
基紙の坪量は特に制限されないが、３０ｇ／ｍ２以上８０ｇ／ｍ２以下であることが好ましく、４０ｇ／ｍ２以上７０ｇ／ｍ２以下であることがより好ましい。 Furthermore, it is possible to treat the surface of the base paper with various chemicals. Examples of 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.
Although 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.
基紙の表面処理の方法は特に限定されるものではないが、ロッドメタリングサイズプレス、ポンド式サイズプレス、ゲートロールコーター、スプレーコーター、ブレードコーター、カーテンコーターなど公知の塗工装置を用いることができる。
基紙の坪量は特に制限されないが、３０ｇ／ｍ２以上８０ｇ／ｍ２以下であることが好ましく、４０ｇ／ｍ２以上７０ｇ／ｍ２以下であることがより好ましい。 Furthermore, it is possible to treat the surface of the base paper with various chemicals. Examples of 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.
Although 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.
「目止め層」
目止め層は、基紙の少なくとも一方の面に設けられ、両面に設けることもできる。
目止め層は、顔料と接着剤とを７５／２５～２５／７５の質量比（顔料／接着剤、乾燥質量）で含有し、接着剤全量に対して、澱粉系化合物と合成樹脂ラテックスとを８０質量％以上、かつ、９０／１０～５０／５０の質量比（澱粉系化合物／合成樹脂ラテックス、乾燥質量）で含有する。本発明の剥離紙用原紙は、目止め層がこの配合を満たすことにより、良好な目止め性を有し、また、この目止め層上に剥離剤層を設けることにより、剥離性、密着性、耐久性に優れた剥離紙とすることができる。
なお、目止め層は、本発明の効果を損なわない範囲で、ＣＮＦ、ＭＦＣ、分散剤、耐水化剤、潤滑剤、消泡剤、増粘剤、保水剤、架橋剤、界面活性剤、防腐剤、染料、蛍光染料等の各種助剤を含有することもできる。 "Blind layer"
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.
In addition, 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.
目止め層は、基紙の少なくとも一方の面に設けられ、両面に設けることもできる。
目止め層は、顔料と接着剤とを７５／２５～２５／７５の質量比（顔料／接着剤、乾燥質量）で含有し、接着剤全量に対して、澱粉系化合物と合成樹脂ラテックスとを８０質量％以上、かつ、９０／１０～５０／５０の質量比（澱粉系化合物／合成樹脂ラテックス、乾燥質量）で含有する。本発明の剥離紙用原紙は、目止め層がこの配合を満たすことにより、良好な目止め性を有し、また、この目止め層上に剥離剤層を設けることにより、剥離性、密着性、耐久性に優れた剥離紙とすることができる。
なお、目止め層は、本発明の効果を損なわない範囲で、ＣＮＦ、ＭＦＣ、分散剤、耐水化剤、潤滑剤、消泡剤、増粘剤、保水剤、架橋剤、界面活性剤、防腐剤、染料、蛍光染料等の各種助剤を含有することもできる。 "Blind layer"
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.
In addition, 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.
・顔料
顔料は、特に限定されることはなく、一般に製紙に使用されている顔料を使用することができる。例えば、カオリン、エンジニアードカオリン、クレー、デラミネーテッドクレー、重質炭酸カルシウム、軽質炭酸カルシウム、タルク、二酸化チタン、水酸化アルミニウム、マイカ、イライト、硫酸バリウム、硫酸カルシウム、酸化亜鉛、珪酸、珪酸塩、コロイダルシリカ、サチンホワイトなどの無機顔料、及び、密実型、中空型、またはコア－シェル型などの有機顔料等の顔料を１種または２種類以上組み合わせて使用することができる。 • Pigment Pigments are not particularly limited, and pigments commonly used in papermaking can be used. For example, 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.
顔料は、特に限定されることはなく、一般に製紙に使用されている顔料を使用することができる。例えば、カオリン、エンジニアードカオリン、クレー、デラミネーテッドクレー、重質炭酸カルシウム、軽質炭酸カルシウム、タルク、二酸化チタン、水酸化アルミニウム、マイカ、イライト、硫酸バリウム、硫酸カルシウム、酸化亜鉛、珪酸、珪酸塩、コロイダルシリカ、サチンホワイトなどの無機顔料、及び、密実型、中空型、またはコア－シェル型などの有機顔料等の顔料を１種または２種類以上組み合わせて使用することができる。 • Pigment Pigments are not particularly limited, and pigments commonly used in papermaking can be used. For example, 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.
顔料は、レーザー回折／散乱法で測定した体積５０％平均粒子径（Ｄ５０、メディアン径）が、２．０μｍ以上７．０μｍ以下であることが好ましい。Ｄ５０は３．０μｍ以上であることがより好ましい。また、５．０μｍ以下であることがより好ましい。
顔料のＤ５０が２．０μｍ未満であると、基紙表面の繊維間の空隙を埋める効果は得られるものの、樹脂ラテックスが顔料間を十分に接着することができず、微細な空隙が多くなるために、目止め性が低下して剥離剤層の均一性が低下する場合がある。また、顔料のＤ５０が７．０μｍを超えると、目止め層表面の凹凸が大きくなり、やはり剥離剤層の均一性が低下する場合がある。
ここで、レーザー回折／散乱法の測定装置としては、例えば、堀場製作所社の粒子径分布測定装置「Ｐａｒｔｉｃａ」、マルバーン社の粒度分布測定装置「ＭＡＳＴＥＲ ＳＩＺＥＲ Ｓ」などが例示可能である。 The pigment preferably has a 50% volume average particle diameter (D50, median diameter) measured by a laser diffraction/scattering method of 2.0 μm or more and 7.0 μm or less. D50 is more preferably 3.0 μm or more. Moreover, it is more preferably 5.0 μm or less.
When the D50 of the pigment is less than 2.0 μm, 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. In addition, the uniformity of the release agent layer may be reduced due to the deterioration of filling properties. On the other hand, if the D50 of the pigment exceeds 7.0 μm, the unevenness of the surface of the filler layer increases, which may also reduce the uniformity of the release agent layer.
Here, 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.
顔料のＤ５０が２．０μｍ未満であると、基紙表面の繊維間の空隙を埋める効果は得られるものの、樹脂ラテックスが顔料間を十分に接着することができず、微細な空隙が多くなるために、目止め性が低下して剥離剤層の均一性が低下する場合がある。また、顔料のＤ５０が７．０μｍを超えると、目止め層表面の凹凸が大きくなり、やはり剥離剤層の均一性が低下する場合がある。
ここで、レーザー回折／散乱法の測定装置としては、例えば、堀場製作所社の粒子径分布測定装置「Ｐａｒｔｉｃａ」、マルバーン社の粒度分布測定装置「ＭＡＳＴＥＲ ＳＩＺＥＲ Ｓ」などが例示可能である。 The pigment preferably has a 50% volume average particle diameter (D50, median diameter) measured by a laser diffraction/scattering method of 2.0 μm or more and 7.0 μm or less. D50 is more preferably 3.0 μm or more. Moreover, it is more preferably 5.0 μm or less.
When the D50 of the pigment is less than 2.0 μm, 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. In addition, the uniformity of the release agent layer may be reduced due to the deterioration of filling properties. On the other hand, if the D50 of the pigment exceeds 7.0 μm, the unevenness of the surface of the filler layer increases, which may also reduce the uniformity of the release agent layer.
Here, 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.
・接着剤
接着剤は、少なくとも澱粉系化合物と合成樹脂ラテックスとを含有する。
接着剤は、本発明の効果を損なわない範囲内において、その他の接着剤を含むことができる。その他の接着剤としては、例えば、完全ケン化ポリビニルアルコール、部分ケン化ポリビニルアルコール、エチレン共重合ポリビニルアルコールなどのポリビニルアルコール類、カゼイン、大豆タンパク、合成タンパクなどのタンパク質類、カルボキシメチルセルロース、ヒドロキシメチルセルロース、ヒドロキシエチルセルロース等のセルロース誘導体、ポリビニルピロリドン、アルギン酸ナトリウムなど等の水溶性樹脂等が挙げられる。 - Adhesive 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.
接着剤は、少なくとも澱粉系化合物と合成樹脂ラテックスとを含有する。
接着剤は、本発明の効果を損なわない範囲内において、その他の接着剤を含むことができる。その他の接着剤としては、例えば、完全ケン化ポリビニルアルコール、部分ケン化ポリビニルアルコール、エチレン共重合ポリビニルアルコールなどのポリビニルアルコール類、カゼイン、大豆タンパク、合成タンパクなどのタンパク質類、カルボキシメチルセルロース、ヒドロキシメチルセルロース、ヒドロキシエチルセルロース等のセルロース誘導体、ポリビニルピロリドン、アルギン酸ナトリウムなど等の水溶性樹脂等が挙げられる。 - Adhesive 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.
澱粉系化合物としては、澱粉、酸化澱粉、ヒドロキシエステル化澱粉（ＨＥＳ）、燐酸エステル澱粉、エステル化澱粉、カチオン化澱粉、尿素リン酸エステル化澱粉等の澱粉類、澱粉を加水分解して得られるデキストリン等を使用することができる。
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.
合成樹脂ラテックスとしては、特に限定されず、スチレン・ブタジエン系共重合体、スチレン・アクリル系共重合体、エチレン・酢酸ビニル系共重合体、ブタジエン・メチルメタクリレート系共重合体、酢酸ビニル・ブチルアクリレート系共重合体、無水マレイン酸共重合体、アクリル酸・メチルメタクリレート系共重合体などの各種共重合体のラテックスを使用することができ、また、１種または２種以上を組み合わせて用いることができる。これらの中で、シリコーン樹脂の目止め性に優れるスチレン・ブタジエン系共重合体ラテックスを使用することが好ましい。また、合成樹脂ラテックスは、動的光散乱法（光子相関法）で測定した平均粒子径が１００μｍ以上のものが好ましく、１５０μｍ以上のものがより好ましい。動的光散乱法（光子相関法）による測定装置としては、例えば、大塚電子株式会社製の「ＦＰＡＲ－１０００」などが例示可能である。
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. Among these, it is preferable to use styrene-butadiene-based copolymer latex, which is excellent in filling properties of silicone resin. The synthetic resin latex preferably has an average particle size of 100 µm or more, more preferably 150 µm or more, as measured by a dynamic light scattering method (photon correlation method). As a measuring device using the dynamic light scattering method (photon correlation method), for example, "FPAR-1000" manufactured by Otsuka Electronics Co., Ltd. can be exemplified.
合成樹脂ラテックスのガラス転移温度（Ｔｇ）は、－２０℃以上３０℃以下であることが好ましい。合成樹脂ラテックスのＴｇが－２０℃より低いと、目止め層が柔らかくなりすぎて傷が付きやすくなり、また、目止め層上に設けた剥離剤層の均一性が低下する場合がある。Ｔｇが３０℃を超えると、目止め層の均一性が低下して、やはり目止め層上に設けた剥離剤層の均一性が低下する場合がある。
なお、合成樹脂ラテックスのＴｇは、合成樹脂ラテックスを１３０℃で３０分間の前処理を行った後、走査型差動熱量計（ＪＩＳ Ｋ－７１２２に準拠して窒素雰囲気下で１０ｍｇの試料を２０℃／分で昇温）での二次転移に伴う比熱の変化を測定して、下記計算式から求められる。
Ｔｇ＝Ｔｇ１×α１＋Ｔｇ２×α２＋・・・＋Ｔｇｎ×αｎ
Ｔｇ１、Ｔｇ２・・・Ｔｇｎ：実測した各組成単体のガラス転移温度（Ｋ）
α１、α２・・・αｎ：全樹脂質量に対する各組成単体の質量分率（％） 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. for 30 minutes, then scanning a differential calorimeter (in accordance with JIS K-7122, measuring 10 mg of a sample in a nitrogen atmosphere at 20°C). C./min), and the change in specific heat associated with secondary transition is measured and calculated from the following formula.
Tg=Tg1×α1+Tg2×α2+ . . . +Tgn×αn
Tg1, Tg2 ... Tgn: Glass transition temperature (K) of each composition alone measured
α1, α2 ... αn: mass fraction (%) of each composition alone with respect to the total resin mass
なお、合成樹脂ラテックスのＴｇは、合成樹脂ラテックスを１３０℃で３０分間の前処理を行った後、走査型差動熱量計（ＪＩＳ Ｋ－７１２２に準拠して窒素雰囲気下で１０ｍｇの試料を２０℃／分で昇温）での二次転移に伴う比熱の変化を測定して、下記計算式から求められる。
Ｔｇ＝Ｔｇ１×α１＋Ｔｇ２×α２＋・・・＋Ｔｇｎ×αｎ
Ｔｇ１、Ｔｇ２・・・Ｔｇｎ：実測した各組成単体のガラス転移温度（Ｋ）
α１、α２・・・αｎ：全樹脂質量に対する各組成単体の質量分率（％） 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. for 30 minutes, then scanning a differential calorimeter (in accordance with JIS K-7122, measuring 10 mg of a sample in a nitrogen atmosphere at 20°C). C./min), and the change in specific heat associated with secondary transition is measured and calculated from the following formula.
Tg=Tg1×α1+Tg2×α2+ . . . +Tgn×αn
Tg1, Tg2 ... Tgn: Glass transition temperature (K) of each composition alone measured
α1, α2 ... αn: mass fraction (%) of each composition alone with respect to the total resin mass
目止め層において、顔料と接着剤との質量比（顔料／接着剤、乾燥質量）は、７０／３０～３０／７０であることが好ましく、６０／４０～４０／６０であることがより好ましい。
接着剤全量に対する澱粉系化合物と合成樹脂ラテックスの合計の割合は、８５質量％以上であることが好ましく、９０質量％以上であることがより好ましい。また、澱粉系化合物と合成樹脂ラテックスとの質量比（澱粉系化合物／合成樹脂ラテックス、乾燥質量）は、８０／２０～５５／４５であることが好ましい。 In the filling layer, the mass ratio of the pigment and the adhesive (pigment/adhesive, dry mass) 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 (starch-based compound/synthetic resin latex, dry mass) is preferably 80/20 to 55/45.
接着剤全量に対する澱粉系化合物と合成樹脂ラテックスの合計の割合は、８５質量％以上であることが好ましく、９０質量％以上であることがより好ましい。また、澱粉系化合物と合成樹脂ラテックスとの質量比（澱粉系化合物／合成樹脂ラテックス、乾燥質量）は、８０／２０～５５／４５であることが好ましい。 In the filling layer, the mass ratio of the pigment and the adhesive (pigment/adhesive, dry mass) 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 (starch-based compound/synthetic resin latex, dry mass) is preferably 80/20 to 55/45.
目止め層の塗工方法については特に限定されるものではなく、公知の塗工装置及び塗工系で塗工することができる。例えば、塗工装置としてはブレードコーター、バーコーター、ロールコーター、エアナイフコーター、リバースロールコーター、カーテンコーター、グラビアコーター、スプレーコーター、サイズプレスコーター、ゲートロールコーターなどが挙げられる。塗工系としては、主として水を媒体とする水系塗工が好ましい。
本発明では、抄紙機と塗工装置とが一体となっているオンマシンコーターで塗工することが好ましい。抄紙機と塗工装置とが別々になっているオフマシンコーターで塗工する場合は、抄紙機での基紙の抄紙後に一旦巻取に巻き上げ、改めて巻取をオフマシンコーターに掛けて塗工するという手順となるが、オンマシンコーターによる塗工では基紙の巻き上げとコーターに掛けるという手順を省略する事ができるため、製造効率が良好となる。
一方、オンマシンコーターによる塗工では、塗工速度を抄紙機の抄紙速度と同調する必要があるため、同調する必要がないオフマシンコーターで塗工するよりも塗工量の調整が難しくなる。本発明の目止め層は、特に塗工量が少ない場合であっても、均一性が高く目止め性が良好であるため、オンマシンコーターによる塗工でも所望の性能を満足することが容易である。
目止め層を乾燥させる手法としては、例えば、蒸気加熱ヒーター、ガスヒーター、赤外線ヒーター、電気ヒーター、熱風加熱ヒーター、マイクロウェーブ、シリンダードライヤー等の通常の方法が用いられる。 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. Examples of 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. As the coating system, water-based coating using water as a main medium is preferable.
In the present invention, the coating is preferably performed by an on-machine coater in which a paper machine and a coating device are integrated. When coating with an off-machine coater in which the paper machine and the coating device are separate, after the base paper is made in the paper machine, it is wound up on a reel once, and then the reeled up is again coated by the off-machine coater. However, coating with an on-machine coater can omit the steps of winding up the base paper and applying it to the coater, resulting in good production efficiency.
On the other hand, in coating with an on-machine coater, it is necessary to synchronize the coating speed with the papermaking speed of the paper machine, so it is more difficult to adjust the coating amount than in coating with an off-machine coater, which does not need to be synchronized. Since 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. be.
As a method for drying the filling layer, for example, a steam heating heater, a gas heater, an infrared heater, an electric heater, a hot air heating heater, a microwave, a cylinder dryer or the like is used.
本発明では、抄紙機と塗工装置とが一体となっているオンマシンコーターで塗工することが好ましい。抄紙機と塗工装置とが別々になっているオフマシンコーターで塗工する場合は、抄紙機での基紙の抄紙後に一旦巻取に巻き上げ、改めて巻取をオフマシンコーターに掛けて塗工するという手順となるが、オンマシンコーターによる塗工では基紙の巻き上げとコーターに掛けるという手順を省略する事ができるため、製造効率が良好となる。
一方、オンマシンコーターによる塗工では、塗工速度を抄紙機の抄紙速度と同調する必要があるため、同調する必要がないオフマシンコーターで塗工するよりも塗工量の調整が難しくなる。本発明の目止め層は、特に塗工量が少ない場合であっても、均一性が高く目止め性が良好であるため、オンマシンコーターによる塗工でも所望の性能を満足することが容易である。
目止め層を乾燥させる手法としては、例えば、蒸気加熱ヒーター、ガスヒーター、赤外線ヒーター、電気ヒーター、熱風加熱ヒーター、マイクロウェーブ、シリンダードライヤー等の通常の方法が用いられる。 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. Examples of 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. As the coating system, water-based coating using water as a main medium is preferable.
In the present invention, the coating is preferably performed by an on-machine coater in which a paper machine and a coating device are integrated. When coating with an off-machine coater in which the paper machine and the coating device are separate, after the base paper is made in the paper machine, it is wound up on a reel once, and then the reeled up is again coated by the off-machine coater. However, coating with an on-machine coater can omit the steps of winding up the base paper and applying it to the coater, resulting in good production efficiency.
On the other hand, in coating with an on-machine coater, it is necessary to synchronize the coating speed with the papermaking speed of the paper machine, so it is more difficult to adjust the coating amount than in coating with an off-machine coater, which does not need to be synchronized. Since 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. be.
As a method for drying the filling layer, for example, a steam heating heater, a gas heater, an infrared heater, an electric heater, a hot air heating heater, a microwave, a cylinder dryer or the like is used.
目止め層の塗工量は、片面当たり乾燥質量で２ｇ／ｍ２以上６ｇ／ｍ２以下であることが好ましい。この塗工量が２ｇ／ｍ２未満では、得られる目止め層が、剥離剤層用塗工液の浸透を防ぐことが困難となる場合がある。一方、この塗工量が６ｇ／ｍ２を超えても、目止め性はほとんど向上せず、高コストとなる。目止め層の塗工量は、片面当たり乾燥質量で３ｇ／ｍ２以上であることがより好ましく、４ｇ／ｍ２以上であることがさらに好ましい。また、目止め層の塗工量は、片面当たり乾燥質量で５ｇ／ｍ２以下であることがより好ましい。
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.
本発明の剥離紙用原紙において、目止め層を有する面のＪＩＳ Ｐ ８１１７：２００９に規定される透気抵抗度（王研式試験機法）は、３，０００秒以上２０，０００秒以下である。透気抵抗度（王研式試験機法）が上記範囲内であると、剥離剤を均一に塗工することができ、剥離紙とした際の密着性、剥離性に優れており、さらに、離解性に優れている。透気抵抗度（王研式試験機法）は、５，０００秒以上１５，０００秒以下であることがより好ましい。
In the base paper for release liner of the present invention, 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. When 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.
本発明の剥離紙用原紙において、目止め層を有する面のＪＩＳ Ｐ８１５５：２０１０に基づいて測定した平滑度（王研式試験機法）は、５０秒以上３００秒以下であることが好ましく、７０秒以上２８０秒以下であることがより好ましい。
In the base paper for release liner of the present invention, 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.
「剥離紙」
本発明の剥離紙用原紙の目止め層上に、剥離剤を塗工して剥離剤層を形成することにより、剥離紙を製造することができる。剥離剤としては、シリコーン樹脂、フッ素化合物、アミノアルキド化合物、ポリエステル化合物等の、表面エネルギーが低く粘着剤との粘着力が弱い材料を特に制限することなく使用することができるが、本発明においては、シリコーン樹脂を使用することが好ましい。剥離剤として使用するシリコーン樹脂としては、無溶剤系シリコーン樹脂、溶剤系シリコーン樹脂、水系エマルジョン系シリコーン樹脂及び無溶剤ＵＶ硬化型シリコーン樹脂等が挙げられる。 "Release paper"
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. As the 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. , it is preferable to use a silicone resin. Examples of 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.
本発明の剥離紙用原紙の目止め層上に、剥離剤を塗工して剥離剤層を形成することにより、剥離紙を製造することができる。剥離剤としては、シリコーン樹脂、フッ素化合物、アミノアルキド化合物、ポリエステル化合物等の、表面エネルギーが低く粘着剤との粘着力が弱い材料を特に制限することなく使用することができるが、本発明においては、シリコーン樹脂を使用することが好ましい。剥離剤として使用するシリコーン樹脂としては、無溶剤系シリコーン樹脂、溶剤系シリコーン樹脂、水系エマルジョン系シリコーン樹脂及び無溶剤ＵＶ硬化型シリコーン樹脂等が挙げられる。 "Release paper"
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. As the 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. , it is preferable to use a silicone resin. Examples of 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.
剥離剤の塗工方法については特に限定されるものではなく、公知の塗工装置及び塗工系で塗工することができる。例えば、塗工装置としてはブレードコーター、バーコーター、ロールコーター、エアナイフコーター、リバースロールコーター、カーテンコーター、グラビアコーター、スプレーコーター、サイズプレスコーター、ゲートロールコーターなどが挙げられる。
剥離剤層を乾燥させる手法としては、例えば、蒸気加熱ヒーター、ガスヒーター、赤外線ヒーター、電気ヒーター、熱風加熱ヒーター、マイクロウェーブ、シリンダードライヤー等の通常の方法が用いられる。 The coating method of the release agent is not particularly limited, and coating can be performed using a known coating apparatus and coating system. Examples of 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.
As a method for drying the release agent layer, for example, 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.
剥離剤層を乾燥させる手法としては、例えば、蒸気加熱ヒーター、ガスヒーター、赤外線ヒーター、電気ヒーター、熱風加熱ヒーター、マイクロウェーブ、シリンダードライヤー等の通常の方法が用いられる。 The coating method of the release agent is not particularly limited, and coating can be performed using a known coating apparatus and coating system. Examples of 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.
As a method for drying the release agent layer, for example, 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.
剥離剤層の塗工量は、片面当たり乾燥質量で０．２ｇ／ｍ２以上３．０ｇ／ｍ２以下であることが好ましい。この塗工量が０．２ｇ／ｍ２未満では、均一な剥離剤層を得ることが困難となる。一方、この塗工量が３．０ｇ／ｍ２を超えても、剥離性はほとんど向上せず、効果が飽和する。剥離剤層の塗工量は、片面当たり乾燥質量で０．３ｇ／ｍ２以上２．０ｇ／ｍ２以下であることがより好ましい。剥離剤層の塗工量は、片面当たり乾燥質量で０．４ｇ／ｍ２以上であることがさらに好ましい。また、剥離剤層の塗工量は、片面当たり乾燥質量で１．２ｇ／ｍ２以下であることがさらに好ましい。
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.
上記したように、本発明の剥離紙用原紙は、目止め層の均一性が高く目止め性が良好であり、この目止め層上に均一な剥離剤層を形成することができる。
As described above, 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.
以下に実施例を挙げて本発明を具体的に示すが、本発明は実施例の記載によって何ら限定されるものではない。また、実施例における質量部は、特に記載がない限り、絶乾での質量部を示す。
Although the present invention will be specifically described below with reference to examples, the present invention is not limited by the description of the examples. Also, parts by mass in the examples indicate parts by mass in absolute dry conditions unless otherwise specified.
実施例に使用する顔料のレーザー回折／散乱法で測定した体積５０％平均粒子径（Ｄ５０）、並びに、剥離紙用原紙の品質及び剥離紙の品質は、下記の方法により測定・評価した。
＜顔料のレーザー回折／散乱法で測定した体積５０％平均粒子径（Ｄ５０）＞
レーザー回折／散乱式粒度分布測定器（マルバーン社製、機器名：マスターサイザーＳ）を用いて測定した。 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.
<Volume 50% average particle size (D50) measured by pigment laser diffraction/scattering method>
Measurement was performed using a laser diffraction/scattering particle size distribution analyzer (manufactured by Malvern, device name: Mastersizer S).
＜顔料のレーザー回折／散乱法で測定した体積５０％平均粒子径（Ｄ５０）＞
レーザー回折／散乱式粒度分布測定器（マルバーン社製、機器名：マスターサイザーＳ）を用いて測定した。 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.
<Volume 50% average particle size (D50) measured by pigment laser diffraction/scattering method>
Measurement was performed using a laser diffraction/scattering particle size distribution analyzer (manufactured by Malvern, device name: Mastersizer S).
＜剥離紙用原紙の品質評価＞
（１）透気抵抗度（王研式試験機法）
ＪＩＳ Ｐ ８１１７：２００９に準じた方法（王研式試験機法）により測定した。
（２）平滑度（王研式試験機法）
ＪＩＳ Ｐ８１５５：２０１０に基づいて、王研式平滑度計（旭精工株式会社製：ＫＹ－５）を使用して目止め層の表面を測定した。
（３）離解性
絶乾質量４０ｇの剥離紙用原紙を、２Ｌの水に浸漬させ、パルプ離解試験機（熊谷理機工業株式会社製、ＪＩＳ Ｐ ８２２０に準拠）で６０分間離解した。水溶液中への離解の程度を目視により観察して、以下の３段階により評価した。
○：パルプ繊維が分散しており、離解性が良好。
△：わずかにパルプ繊維の結束が残っているが、離解性は概ね良好。
×：パルプ繊維の塊やパルプ繊維の結束が残っており、離解性が不良。 <Quality evaluation of base paper for release paper>
(1) Air resistance (Oken type tester method)
It was measured by a method (Oken test method) according to JIS P 8117:2009.
(2) 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).
(3) 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.
Δ: 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.
（１）透気抵抗度（王研式試験機法）
ＪＩＳ Ｐ ８１１７：２００９に準じた方法（王研式試験機法）により測定した。
（２）平滑度（王研式試験機法）
ＪＩＳ Ｐ８１５５：２０１０に基づいて、王研式平滑度計（旭精工株式会社製：ＫＹ－５）を使用して目止め層の表面を測定した。
（３）離解性
絶乾質量４０ｇの剥離紙用原紙を、２Ｌの水に浸漬させ、パルプ離解試験機（熊谷理機工業株式会社製、ＪＩＳ Ｐ ８２２０に準拠）で６０分間離解した。水溶液中への離解の程度を目視により観察して、以下の３段階により評価した。
○：パルプ繊維が分散しており、離解性が良好。
△：わずかにパルプ繊維の結束が残っているが、離解性は概ね良好。
×：パルプ繊維の塊やパルプ繊維の結束が残っており、離解性が不良。 <Quality evaluation of base paper for release paper>
(1) Air resistance (Oken type tester method)
It was measured by a method (Oken test method) according to JIS P 8117:2009.
(2) 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).
(3) 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.
Δ: 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.
＜剥離紙の品質評価＞
（１）剥離力
剥離紙の剥離剤層の上に、アクリルエマルジョン粘着剤（サイデン化学株式会社製、ＡＴ－２７）を、塗工量が乾燥質量で５０ｇ／ｍ２となるように塗工した後、１１０℃で３分間乾燥して粘着剤層を形成した。次いで、粘着剤層の上に上質紙（坪量６４ｇ／ｍ２）を貼付し、粘着紙を作成した。
この粘着紙を２３℃、５０％ＲＨの環境下で１週間静置した後、ＪＩＳ Ｚ０２３７：２００９に基づいて、１８０度方向に３００ｍｍ／分の速度で上質紙を剥離させる条件で、引張試験機を使用して上質紙と剥離剤層の剥離力を測定した。なお、剥離力が４０～１５０ｍＮ／３０ｍｍであると、実用上問題がない。
（２）密着性
剥離紙の剥離剤層の表面を指（およそ３ｋｇ荷重）で約５ｃｍを往復５回擦り、表面状態を目視により観察して、以下の３段階により評価した。
○：擦った箇所に跡が付かない。
△：擦った箇所に跡が付くが、剥離剤層の剥がれはない。
×：擦った箇所の剥離剤層が剥がれる。
（３）耐久性
７０℃、９０％ＲＨの環境下で３日間処理した後、剥離紙の剥離剤層の表面を指（およそ３ｋｇ荷重）で約５ｃｍを往復５回擦り、表面状態を目視により観察して、以下の３段階により評価した。
○：擦った箇所に跡が付かない。
△：擦った箇所に跡が付くが、剥離剤層の剥がれはない。
×：擦った箇所の剥離剤層が剥がれる。 <Quality evaluation of release paper>
(1) Peel strength Acrylic emulsion pressure-sensitive adhesive (AT-27, manufactured by Saiden Chemical Co., Ltd.) was applied onto the release agent layer of the release paper so that the coating amount was 50 g/m 2 in terms of dry mass. After that, it was dried at 110° C. for 3 minutes to form an adhesive layer. Next, fine paper (basis weight: 64 g/m 2 ) was pasted on the adhesive layer to prepare adhesive paper.
After this adhesive paper was allowed to stand in an environment of 23° C. and 50% RH for one week, a tension tester was performed under the conditions of peeling off the fine paper at a speed of 300 mm / min in the direction of 180 degrees based on JIS Z0237:2009. was used to measure the release force between the woodfree paper and the release agent layer. Practically, there is no problem when the peel force is 40 to 150 mN/30 mm.
(2) Adhesion The surface of the release agent layer of the release paper was rubbed with a finger (approximately 3 kg load) for about 5 cm back and forth 5 times, and the surface condition was visually observed and evaluated according to the following three grades.
◯: No mark is left on the rubbed portion.
Δ: Marks are left on rubbed portions, but the release agent layer is not peeled off.
x: The release agent layer is peeled off at rubbed portions.
(3) Durability After treatment in an environment of 70°C and 90% RH for 3 days, the surface of the release agent layer of the release paper was rubbed with a finger (approximately 3 kg load) about 5 cm back and forth 5 times, and the surface condition was visually observed. It was observed and evaluated according to the following three grades.
◯: No mark is left on the rubbed portion.
Δ: Marks are left on rubbed portions, but the release agent layer is not peeled off.
x: The release agent layer is peeled off at rubbed portions.
（１）剥離力
剥離紙の剥離剤層の上に、アクリルエマルジョン粘着剤（サイデン化学株式会社製、ＡＴ－２７）を、塗工量が乾燥質量で５０ｇ／ｍ２となるように塗工した後、１１０℃で３分間乾燥して粘着剤層を形成した。次いで、粘着剤層の上に上質紙（坪量６４ｇ／ｍ２）を貼付し、粘着紙を作成した。
この粘着紙を２３℃、５０％ＲＨの環境下で１週間静置した後、ＪＩＳ Ｚ０２３７：２００９に基づいて、１８０度方向に３００ｍｍ／分の速度で上質紙を剥離させる条件で、引張試験機を使用して上質紙と剥離剤層の剥離力を測定した。なお、剥離力が４０～１５０ｍＮ／３０ｍｍであると、実用上問題がない。
（２）密着性
剥離紙の剥離剤層の表面を指（およそ３ｋｇ荷重）で約５ｃｍを往復５回擦り、表面状態を目視により観察して、以下の３段階により評価した。
○：擦った箇所に跡が付かない。
△：擦った箇所に跡が付くが、剥離剤層の剥がれはない。
×：擦った箇所の剥離剤層が剥がれる。
（３）耐久性
７０℃、９０％ＲＨの環境下で３日間処理した後、剥離紙の剥離剤層の表面を指（およそ３ｋｇ荷重）で約５ｃｍを往復５回擦り、表面状態を目視により観察して、以下の３段階により評価した。
○：擦った箇所に跡が付かない。
△：擦った箇所に跡が付くが、剥離剤層の剥がれはない。
×：擦った箇所の剥離剤層が剥がれる。 <Quality evaluation of release paper>
(1) Peel strength Acrylic emulsion pressure-sensitive adhesive (AT-27, manufactured by Saiden Chemical Co., Ltd.) was applied onto the release agent layer of the release paper so that the coating amount was 50 g/m 2 in terms of dry mass. After that, it was dried at 110° C. for 3 minutes to form an adhesive layer. Next, fine paper (basis weight: 64 g/m 2 ) was pasted on the adhesive layer to prepare adhesive paper.
After this adhesive paper was allowed to stand in an environment of 23° C. and 50% RH for one week, a tension tester was performed under the conditions of peeling off the fine paper at a speed of 300 mm / min in the direction of 180 degrees based on JIS Z0237:2009. was used to measure the release force between the woodfree paper and the release agent layer. Practically, there is no problem when the peel force is 40 to 150 mN/30 mm.
(2) Adhesion The surface of the release agent layer of the release paper was rubbed with a finger (approximately 3 kg load) for about 5 cm back and forth 5 times, and the surface condition was visually observed and evaluated according to the following three grades.
◯: No mark is left on the rubbed portion.
Δ: Marks are left on rubbed portions, but the release agent layer is not peeled off.
x: The release agent layer is peeled off at rubbed portions.
(3) Durability After treatment in an environment of 70°C and 90% RH for 3 days, the surface of the release agent layer of the release paper was rubbed with a finger (approximately 3 kg load) about 5 cm back and forth 5 times, and the surface condition was visually observed. It was observed and evaluated according to the following three grades.
◯: No mark is left on the rubbed portion.
Δ: Marks are left on rubbed portions, but the release agent layer is not peeled off.
x: The release agent layer is peeled off at rubbed portions.
［実施例１］
（目止め層用塗工液の調製）
顔料としてカオリン（イメリス社製：ＫＣＳ、Ｄ５０：４．６μｍ）を５０質量部、澱粉系化合物として酸化澱粉（日本食品化工株式会社製：ＭＳ＃３８００）を３０質量部、合成樹脂ラテックスとしてスチレン・ブタジエン系共重合体ラテックス（日本エイアンドエル株式会社製：ＳＮ－３０７Ｒ、Ｔｇ：８℃）を２０質量部、潤滑剤（サンノプコ株式会社製：ノプコートＣ－１０４）を０．１質量部配合して、目止め層用塗工液を調製した。 [Example 1]
(Preparation of coating solution for filling layer)
50 parts by mass of kaolin (manufactured by Imerys: KCS, D50: 4.6 μm) 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. 20 parts by mass of butadiene-based copolymer latex (manufactured by Nippon A&L Co., Ltd.: SN-307R, Tg: 8 ° C.) and 0.1 part by mass of a lubricant (manufactured by San Nopco Co., Ltd.: Nopcoat C-104), A coating solution for filling layer was prepared.
（目止め層用塗工液の調製）
顔料としてカオリン（イメリス社製：ＫＣＳ、Ｄ５０：４．６μｍ）を５０質量部、澱粉系化合物として酸化澱粉（日本食品化工株式会社製：ＭＳ＃３８００）を３０質量部、合成樹脂ラテックスとしてスチレン・ブタジエン系共重合体ラテックス（日本エイアンドエル株式会社製：ＳＮ－３０７Ｒ、Ｔｇ：８℃）を２０質量部、潤滑剤（サンノプコ株式会社製：ノプコートＣ－１０４）を０．１質量部配合して、目止め層用塗工液を調製した。 [Example 1]
(Preparation of coating solution for filling layer)
50 parts by mass of kaolin (manufactured by Imerys: KCS, D50: 4.6 μm) 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. 20 parts by mass of butadiene-based copolymer latex (manufactured by Nippon A&L Co., Ltd.: SN-307R, Tg: 8 ° C.) and 0.1 part by mass of a lubricant (manufactured by San Nopco Co., Ltd.: Nopcoat C-104), A coating solution for filling layer was prepared.
（基紙の作製）
カナダ式標準ろ水度（ＣＳＦ）３００ｍｌの広葉樹クラフトパルプ（ＬＢＫＰ）１００質量部を原料パルプとした。紙力剤としてカチオン化澱粉を原料パルプ１００質量部に対して０．３質量部添加し、次いで、硫酸バンドを１．５質量部添加した後、長網多筒式の抄紙機を用いて抄紙を行い、坪量５６ｇ／ｍ２の基紙を得た。 (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. As 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 .
カナダ式標準ろ水度（ＣＳＦ）３００ｍｌの広葉樹クラフトパルプ（ＬＢＫＰ）１００質量部を原料パルプとした。紙力剤としてカチオン化澱粉を原料パルプ１００質量部に対して０．３質量部添加し、次いで、硫酸バンドを１．５質量部添加した後、長網多筒式の抄紙機を用いて抄紙を行い、坪量５６ｇ／ｍ２の基紙を得た。 (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. As 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 .
（剥離紙用原紙の作製）
得られた基紙の片面上に、目止め層用塗工液を乾燥質量で塗工量４．０ｇ／ｍ２となるようオンマシンブレードコーターを用いて塗工、乾燥して、剥離紙用原紙を得た。 (Production of base paper for release paper)
On one side of the obtained base paper, 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.
得られた基紙の片面上に、目止め層用塗工液を乾燥質量で塗工量４．０ｇ／ｍ２となるようオンマシンブレードコーターを用いて塗工、乾燥して、剥離紙用原紙を得た。 (Production of base paper for release paper)
On one side of the obtained base paper, 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.
［実施例２］
目止め層用塗工液中のカオリンを７０質量部とし、澱粉系化合物を２０質量部、合成樹脂ラテックスを１０質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。
［実施例３］
目止め層用塗工液中のカオリンを３０質量部とし、澱粉系化合物を５０質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。
［実施例４］
目止め層用塗工液中の澱粉系化合物を４５質量部、合成樹脂ラテックスを５質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。
［実施例５］
目止め層用塗工液中の澱粉系化合物を２５質量部、合成樹脂ラテックスを２５質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。 [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.
目止め層用塗工液中のカオリンを７０質量部とし、澱粉系化合物を２０質量部、合成樹脂ラテックスを１０質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。
［実施例３］
目止め層用塗工液中のカオリンを３０質量部とし、澱粉系化合物を５０質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。
［実施例４］
目止め層用塗工液中の澱粉系化合物を４５質量部、合成樹脂ラテックスを５質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。
［実施例５］
目止め層用塗工液中の澱粉系化合物を２５質量部、合成樹脂ラテックスを２５質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。 [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.
［比較例１］
目止め層用塗工液中のカオリンを２０質量部とし、澱粉系化合物を６０質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。
［比較例２］
目止め層用塗工液中のカオリンを８０質量部とし、澱粉系化合物を１０質量部、合成樹脂ラテックスを１０質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。
［比較例３］
目止め層用塗工液中の澱粉系化合物を４６質量部、合成樹脂ラテックスを４質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。
［比較例４］
目止め層用塗工液中の澱粉系化合物を２０質量部、合成樹脂ラテックスを３０質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。 [Comparative 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. .
[Comparative 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.
目止め層用塗工液中のカオリンを２０質量部とし、澱粉系化合物を６０質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。
［比較例２］
目止め層用塗工液中のカオリンを８０質量部とし、澱粉系化合物を１０質量部、合成樹脂ラテックスを１０質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。
［比較例３］
目止め層用塗工液中の澱粉系化合物を４６質量部、合成樹脂ラテックスを４質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。
［比較例４］
目止め層用塗工液中の澱粉系化合物を２０質量部、合成樹脂ラテックスを３０質量部とした以外は、実施例１と同様にして剥離紙用原紙を得た。 [Comparative 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. .
[Comparative 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.
［比較例５］
目止め層用塗工液中の合成樹脂ラテックス２０質量部を完全ケン化ポリビニルアルコール（クラレ株式会社製：ＰＶＡ１１７）２０質量部に変更した以外は、実施例１と同様にして剥離紙用原紙を得た。
［比較例６］
目止め層用塗工液中のカオリン５０質量部をシリカ（水澤化学工業株式会社製：ミズカシルＰ－５０、Ｄ５０：１０．０μｍ）５０質量部に変更した以外は、実施例１と同様にして剥離紙用原紙を得た。
［比較例７］
目止め層用塗工液を乾燥質量で塗工量８ｇ／ｍ２となるように塗工、乾燥した以外は、実施例１と同様にして剥離紙用原紙を得た。 [Comparative Example 5]
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.
[Comparative Example 6]
In the same manner as in Example 1, except that 50 parts by mass of kaolin in the coating solution for filling layer was changed to 50 parts by mass of silica (Mizusawa Chemical Co., Ltd.: Mizukasil P-50, D50: 10.0 μm). A base paper for release paper was obtained.
[Comparative Example 7]
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.
目止め層用塗工液中の合成樹脂ラテックス２０質量部を完全ケン化ポリビニルアルコール（クラレ株式会社製：ＰＶＡ１１７）２０質量部に変更した以外は、実施例１と同様にして剥離紙用原紙を得た。
［比較例６］
目止め層用塗工液中のカオリン５０質量部をシリカ（水澤化学工業株式会社製：ミズカシルＰ－５０、Ｄ５０：１０．０μｍ）５０質量部に変更した以外は、実施例１と同様にして剥離紙用原紙を得た。
［比較例７］
目止め層用塗工液を乾燥質量で塗工量８ｇ／ｍ２となるように塗工、乾燥した以外は、実施例１と同様にして剥離紙用原紙を得た。 [Comparative Example 5]
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.
[Comparative Example 6]
In the same manner as in Example 1, except that 50 parts by mass of kaolin in the coating solution for filling layer was changed to 50 parts by mass of silica (Mizusawa Chemical Co., Ltd.: Mizukasil P-50, D50: 10.0 μm). A base paper for release paper was obtained.
[Comparative Example 7]
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.
（剥離剤層用塗工液の調製）
無溶剤系シリコーン樹脂（東レ・ダウコーニング・シリコーン社製：ＬＴＣ－１０５３Ｌ）に触媒を２部添加し、剥離剤層用塗工液とした。 (Preparation of coating solution for release agent layer)
Two parts of a catalyst were added to a solventless silicone resin (manufactured by Dow Corning Toray Silicone Co., Ltd.: LTC-1053L) to prepare a coating solution for a release agent layer.
無溶剤系シリコーン樹脂（東レ・ダウコーニング・シリコーン社製：ＬＴＣ－１０５３Ｌ）に触媒を２部添加し、剥離剤層用塗工液とした。 (Preparation of coating solution for release agent layer)
Two parts of a catalyst were added to a solventless silicone resin (manufactured by Dow Corning Toray Silicone Co., Ltd.: LTC-1053L) to prepare a coating solution for a release agent layer.
（剥離紙の作成）
剥離紙用原紙の目止め層の上に、ＲＩ印刷機を用いて剥離剤層用塗工液を、塗工量が乾燥質量で１．０ｇ／ｍ２となるように塗工した後、乾燥機で硬化処理（１３０℃、３０秒）を行い、剥離紙を得た。 (Preparation of 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.
剥離紙用原紙の目止め層の上に、ＲＩ印刷機を用いて剥離剤層用塗工液を、塗工量が乾燥質量で１．０ｇ／ｍ２となるように塗工した後、乾燥機で硬化処理（１３０℃、３０秒）を行い、剥離紙を得た。 (Preparation of 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.
各実施例、比較例で得られた剥離紙用原紙及び剥離紙の評価結果を表１に示す。
Table 1 shows the evaluation results of the base paper for release liner and release liner obtained in each example and comparative example.
Claims (6)
- 基紙と、前記基紙の少なくとも一方の面に目止め層を備え、
前記目止め層が、顔料と接着剤とを７５／２５～２５／７５の質量比（顔料／接着剤：乾燥質量）で含有し、
前記接着剤として、澱粉系化合物と合成樹脂ラテックスとを、接着剤全量に対して８０質量％以上、かつ、９０／１０～５０／５０の質量比（澱粉系化合物／合成樹脂ラテックス：乾燥質量）で含有し、
ＪＩＳ Ｐ ８１１７：２００９に準拠した透気抵抗度（王研式試験機法）が３０００秒以上２００００秒以下であることを特徴とする剥離紙用原紙。 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),
As the adhesive, 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). contains with
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. - 前記目止め層の塗工量が、片面当たり乾燥質量で２ｇ／ｍ２以上６ｇ／ｍ２以下であることを特徴とする請求項１に記載の剥離紙用原紙。 2. The base paper for release liner according to claim 1, wherein the coating amount of said filler layer is 2 g/m< 2 > or more and 6 g/m< 2 > or less in terms of dry mass per side.
- 前記目止め層のＪＩＳ Ｐ８１５５：２０１０に基づいて測定した平滑度（王研式試験機法）が、５０秒以上３００秒以下であることを特徴とする請求項１または２に記載の剥離紙用原紙。 3. The release paper according to claim 1 or 2, characterized in that the smoothness of the filling layer measured based on JIS P8155:2010 (Oken tester method) is 50 seconds or more and 300 seconds or less. Base paper.
- 前記基紙の坪量が、３０ｇ／ｍ２以上８０ｇ／ｍ２以下であることを特徴とする請求項１～３のいずれかに記載の剥離紙用原紙。 The base paper for release liner according to any one of claims 1 to 3, wherein the base paper has a basis weight of 30 g/m 2 or more and 80 g/m 2 or less.
- 請求項１～４のいずれかに記載された剥離紙用原紙の前記目止め層上に剥離剤層を有することを特徴とする剥離紙。 A release paper characterized by having a release agent layer on the filling layer of the base paper for release paper according to any one of claims 1 to 4.
- 基紙の少なくとも一方の面に、
少なくとも顔料と接着剤とを７５／２５～２５／７５の質量比（顔料／接着剤、乾燥質量）で含有し、前記接着剤として、澱粉系化合物と合成樹脂ラテックスとを、接着剤全量に対して８０質量％以上、かつ、９０／１０～５０／５０の質量比（澱粉系化合物／合成樹脂ラテックス、乾燥質量）で含有する目止め層用塗工液を、オンマシンコーターで塗工することを特徴とする剥離紙用原紙の製造方法。 on at least one side of the base paper,
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:
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| JP (1) | JPWO2022190860A1 (en) |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10131094A (en) * | 1996-10-28 | 1998-05-19 | Oji Paper Co Ltd | Substrate for separate paper |
| JPH10510891A (en) * | 1995-04-05 | 1998-10-20 | ケムメーラー ゲゼルシャフト ミット ベシュレンクテル ハフツング | Base paper with aluminum hydroxide pigment coating |
| US20150125658A1 (en) * | 2012-06-15 | 2015-05-07 | Stirling Consulting, Inc. | Release Paper and Method of Manufacture |
| JP2015175072A (en) * | 2014-03-14 | 2015-10-05 | 王子ホールディングス株式会社 | Base paper for release paper, and release paper |
| JP2016160544A (en) * | 2015-02-27 | 2016-09-05 | 北越紀州製紙株式会社 | Base paper for process release paper and method for producing the same |
-
2022
- 2022-02-22 WO PCT/JP2022/007238 patent/WO2022190860A1/en active Application Filing
- 2022-02-22 JP JP2023505274A patent/JPWO2022190860A1/ja active Pending
- 2022-03-08 TW TW111108389A patent/TW202300753A/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10510891A (en) * | 1995-04-05 | 1998-10-20 | ケムメーラー ゲゼルシャフト ミット ベシュレンクテル ハフツング | Base paper with aluminum hydroxide pigment coating |
| JPH10131094A (en) * | 1996-10-28 | 1998-05-19 | Oji Paper Co Ltd | Substrate for separate paper |
| US20150125658A1 (en) * | 2012-06-15 | 2015-05-07 | Stirling Consulting, Inc. | Release Paper and Method of Manufacture |
| JP2015175072A (en) * | 2014-03-14 | 2015-10-05 | 王子ホールディングス株式会社 | Base paper for release paper, and release paper |
| JP2016160544A (en) * | 2015-02-27 | 2016-09-05 | 北越紀州製紙株式会社 | Base paper for process release paper and method for producing the same |
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| JPWO2022190860A1 (en) | 2022-09-15 |
| TW202300753A (en) | 2023-01-01 |
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