JP7440994B2 - coated paper - Google Patents
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- JP7440994B2 JP7440994B2 JP2016172973A JP2016172973A JP7440994B2 JP 7440994 B2 JP7440994 B2 JP 7440994B2 JP 2016172973 A JP2016172973 A JP 2016172973A JP 2016172973 A JP2016172973 A JP 2016172973A JP 7440994 B2 JP7440994 B2 JP 7440994B2
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- 238000007639 printing Methods 0.000 claims description 74
- 239000000049 pigment Substances 0.000 claims description 72
- 238000000576 coating method Methods 0.000 claims description 37
- 239000011248 coating agent Substances 0.000 claims description 35
- 239000000853 adhesive Substances 0.000 claims description 32
- 230000001070 adhesive effect Effects 0.000 claims description 32
- 239000011247 coating layer Substances 0.000 claims description 26
- 230000003068 static effect Effects 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 17
- 229920000126 latex Polymers 0.000 claims description 16
- 239000004816 latex Substances 0.000 claims description 16
- 229920001131 Pulp (paper) Polymers 0.000 claims description 14
- 239000004927 clay Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 239000005995 Aluminium silicate Substances 0.000 claims description 11
- 235000012211 aluminium silicate Nutrition 0.000 claims description 11
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000010998 test method Methods 0.000 claims description 5
- 239000000123 paper Substances 0.000 description 150
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 40
- 239000007787 solid Substances 0.000 description 23
- 235000010216 calcium carbonate Nutrition 0.000 description 20
- 229910000019 calcium carbonate Inorganic materials 0.000 description 19
- 239000002245 particle Substances 0.000 description 17
- 238000001035 drying Methods 0.000 description 15
- 229920002472 Starch Polymers 0.000 description 11
- 235000019698 starch Nutrition 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 8
- 239000008107 starch Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 229910001868 water Inorganic materials 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000003086 colorant Substances 0.000 description 6
- 239000000945 filler Substances 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- CRDNMYFJWFXOCH-UHFFFAOYSA-N indirubin Chemical compound N1C2=CC=CC=C2C(=O)C1=C1C2=CC=CC=C2NC1=O CRDNMYFJWFXOCH-UHFFFAOYSA-N 0.000 description 5
- 239000001254 oxidized starch Substances 0.000 description 5
- 235000013808 oxidized starch Nutrition 0.000 description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 description 5
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 229920002261 Corn starch Polymers 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 229940099112 cornstarch Drugs 0.000 description 4
- 239000011087 paperboard Substances 0.000 description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 229920001353 Dextrin Polymers 0.000 description 2
- 239000004375 Dextrin Substances 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000002518 antifoaming agent Substances 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
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 235000019425 dextrin Nutrition 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 238000007646 gravure printing Methods 0.000 description 2
- 239000002655 kraft paper Substances 0.000 description 2
- 238000007645 offset printing Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 102220043159 rs587780996 Human genes 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- -1 wallpaper Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-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
- YAXXOCZAXKLLCV-UHFFFAOYSA-N 3-dodecyloxolane-2,5-dione Chemical class CCCCCCCCCCCCC1CC(=O)OC1=O YAXXOCZAXKLLCV-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- GAWIXWVDTYZWAW-UHFFFAOYSA-N C[CH]O Chemical group C[CH]O GAWIXWVDTYZWAW-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- CRDNMYFJWFXOCH-BUHFOSPRSA-N Couroupitine B Natural products N\1C2=CC=CC=C2C(=O)C/1=C1/C2=CC=CC=C2NC1=O CRDNMYFJWFXOCH-BUHFOSPRSA-N 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 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
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 108010073771 Soybean Proteins Proteins 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 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
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 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
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 229920003090 carboxymethyl hydroxyethyl cellulose Polymers 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 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
- 125000002091 cationic group Chemical group 0.000 description 1
- 229920006319 cationized starch Polymers 0.000 description 1
- 238000009993 causticizing Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 1
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920000962 poly(amidoamine) Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 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
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 235000019710 soybean protein Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002562 thickening agent Substances 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
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 1
- 229940007718 zinc hydroxide Drugs 0.000 description 1
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 1
Description
本発明は塗工紙およびその製造方法に関する。より詳しくは、本発明はマット調印刷用塗工紙およびその製造方法に関する。 The present invention relates to coated paper and a method for producing the same. More specifically, the present invention relates to a coated paper for matte printing and a method for producing the same.
塗工紙は光沢塗工紙と艶消し塗工紙に大別される。光沢塗工紙には、従来高級印刷に用いられていたアート紙、スーパーアート紙、あるいはカタログ、パンフレットなどに用いられるコート紙等があり、印刷仕上がりが白紙光沢も印刷光沢も高いグロス調となる。艶消し塗工紙とは光沢塗工紙よりも白紙光沢や印刷光沢が低い塗工紙であり、ダル調塗工紙、マット調塗工紙がある。特にマット調塗工紙は、光沢塗工紙に比べて白紙光沢と印刷光沢の差異が大きく、印刷後の文字部が読みやすいことから、近年需要が増えている。 Coated paper is broadly divided into glossy coated paper and matte coated paper. Glossy coated paper includes art paper, super art paper, which was conventionally used for high-end printing, and coated paper, which is used for catalogs and pamphlets, etc., and the printing finish is either white gloss or glossy with high printing gloss. . Matte coated paper is a coated paper that has lower white gloss and printing gloss than glossy coated paper, and includes dull coated paper and matte coated paper. In particular, the demand for matte coated paper has been increasing in recent years because the difference between white paper gloss and printing gloss is larger than that of glossy coated paper, and the text after printing is easier to read.
一方、マット調塗工紙は光沢塗工紙に比べて表面の凹凸が大きいので、紙の表面に乗ったインキが沈み込みやすい。そのため、印刷濃度を上げるためにはインキを多めに転移させる必要がある。従って、マット調塗工紙はインキの転移量が多くなるので乾燥性が低下する傾向にある。インキの乾燥性が劣ると、印刷後の印字物を重ねた際にインキが他方に転移する「裏移り」の問題が発生しやすい。そのため、一般に、印刷物と紙との密着を防止するために澱粉等のパウダーを使用したり、重ねた後に擦れが生じないように静置したりする等の対策が取られている。特に両面印刷を行う場合は、上記「裏移り」が発生すると印刷画像が汚損され、印刷物の価値が著しく損なわれるため、片面印刷後の静置時間を長くとり、擦れても「裏移り」が発生しなくなるまでインキを乾燥させる必要がある。インキの乾燥性が劣るとこの静置時間が長くなるため、作業効率が低下する。さらに、両面印刷においては反対面に印刷を施す際に、ロール等により既に印刷された面の印刷画像が擦られるため、インキの乾燥性が劣ると印刷画像が汚損されるおそれがある。よって、印刷速度の向上や両面印刷に対応するため、インキが速やかに乾燥する性能が求められている。 On the other hand, matte coated paper has a more uneven surface than glossy coated paper, so ink on the surface of the paper tends to sink into it. Therefore, in order to increase printing density, it is necessary to transfer more ink. Therefore, since matte coated paper has a large amount of ink transfer, it tends to have poor drying properties. If the drying properties of the ink are poor, the problem of "set-off" in which the ink transfers to one printed matter after printing is likely to occur when the printed matter is stacked on top of the other. Therefore, measures are generally taken to prevent printed matter from adhering to the paper, such as using powder such as starch, or allowing the paper to stand still after stacking to prevent rubbing. Especially when performing double-sided printing, if the above-mentioned "set-off" occurs, the printed image will be stained and the value of the printed material will be significantly impaired. It is necessary to dry the ink until it no longer occurs. If the drying properties of the ink are poor, this standing time becomes longer, resulting in a decrease in work efficiency. Furthermore, in double-sided printing, when printing is performed on the opposite side, the printed image on the already printed side is rubbed by a roll or the like, so if the drying properties of the ink are poor, the printed image may be smeared. Therefore, in order to improve printing speed and support double-sided printing, there is a need for performance that allows ink to dry quickly.
さらに、塗工紙には、用紙が滑りやすくなって紙が揃わなくなり印刷機へのセットが困難になる、あるいは断裁が困難になる等の不具合を回避するために、紙の摩擦係数を調整することが検討されてきた。一般に、紙においては、動的摩擦係数は静的摩擦係数よりも小さくなることが知られている。このため、静的摩擦係数をある程度高くすれば適度に高い動的摩擦係数が得られるので、従来の技術は静的摩擦係数を調整することを主体に焦点が当てられていた。動的摩擦係数と静的摩擦係数との関係に着目した技術もあるが（例えば特許文献１）、当該技術も動的摩擦係数が静的摩擦係数よりも小さいことを前提としている。 Furthermore, in order to avoid problems such as the paper becoming slippery and becoming misaligned, making it difficult to load it into the printing machine or making it difficult to cut, the coefficient of friction of the paper must be adjusted. This has been considered. It is generally known that the dynamic friction coefficient of paper is smaller than the static friction coefficient. For this reason, since a moderately high dynamic friction coefficient can be obtained by increasing the static friction coefficient to a certain degree, conventional techniques have mainly focused on adjusting the static friction coefficient. Although there is a technique that focuses on the relationship between the dynamic friction coefficient and the static friction coefficient (for example, Patent Document 1), this technique also assumes that the dynamic friction coefficient is smaller than the static friction coefficient.
塗工紙の紙揃い性が悪いと裁断が困難になったり、また印刷機内で印刷用塗工紙が過度に滑りすぎると印刷不良が発生したりするが、発明者らは静的摩擦係数を高くするのみではこの不良を解決できないこと、さらにはマット調の印刷用塗工紙でこの傾向が特に高いことを見出した。そして発明者らは、塗工紙に静的摩擦係数よりも高い動的摩擦係数を付与することで、静的状態における不具合および動的状態における不具合を解消できることを見出した。以上を鑑み、本発明は、インキの乾燥性に優れ、かつ静的摩擦係数よりも高い動的摩擦係数を有する、塗工紙特にマット調印刷用塗工紙を提供することを課題とする。 Poor alignment of coated paper can make cutting difficult, and excessive slippage of coated paper in a printing machine can cause printing defects. We have found that this defect cannot be solved simply by increasing the temperature, and that this tendency is particularly high with matte coated printing paper. The inventors have discovered that by imparting a dynamic friction coefficient higher than the static friction coefficient to coated paper, problems in a static state and problems in a dynamic state can be resolved. In view of the above, an object of the present invention is to provide a coated paper, particularly a coated paper for matte printing, which has excellent ink drying properties and has a dynamic coefficient of friction higher than a static coefficient of friction.
前記課題は、以下の本発明により解決される。
［１］ＪＩＳ－Ｐ８１４２による白紙光沢度が３０％未満、かつ
ＩＳＯ １５３５９に準じて測定した静的摩擦係数および動的摩擦係数において、静的摩擦係数よりも大きい動的摩擦係数を有する、塗工紙。
［２］原紙、およびその上に設けられた顔料と接着剤を含む顔料塗工層を備え、
前記顔料がカオリンまたはクレーを含み、
前記接着剤が、全接着剤中、２０～５０重量％のラテックスを含む、
請求項１に記載の塗工紙。
［３］印刷用塗工紙である、［１］または［２］に記載の塗工紙。
［４］ＪＡＰＡＮ ＴＡＰＰＩ 紙パルプ試験方法 Ｎｏ．４６ により測定した印刷インキ受理性が２０～３５である、［３］に記載の塗工紙。［５］原紙上に、顔料と接着剤を含む顔料塗工液をブレード塗工する工程を備え、
前記顔料がカオリンまたはクレーを含み、
前記接着剤が、全接着剤中、２０～５０重量％のラテックスを含む、
［１］～［４］のいずれかに記載の塗工紙の製造方法。
The above problem is solved by the following invention.
[1] A coating having a white paper glossiness of less than 30% according to JIS-P8142, and a dynamic friction coefficient larger than the static friction coefficient in the static friction coefficient and dynamic friction coefficient measured according to ISO 15359. paper.
[2] A base paper and a pigment coating layer provided thereon containing a pigment and an adhesive,
the pigment contains kaolin or clay,
The adhesive contains 20 to 50% by weight of latex based on the total adhesive.
Coated paper according to claim 1.
[3] The coated paper according to [1] or [2], which is a coated paper for printing.
[4] JAPAN TAPPI Paper Pulp Test Method No. 46. The coated paper according to [3], which has a printing ink receptivity of 20 to 35 as measured by 46. [5] A step of applying a pigment coating liquid containing a pigment and an adhesive onto the base paper with a blade,
the pigment contains kaolin or clay,
The adhesive contains 20 to 50% by weight of latex based on the total adhesive.
The method for producing coated paper according to any one of [1] to [4].
本発明により、紙揃い性に優れる塗工紙、特にマット調印刷用塗工紙を提供できる。 ADVANTAGE OF THE INVENTION According to the present invention, it is possible to provide a coated paper with excellent paper alignment properties, particularly a coated paper for matte printing.
以下、本発明を詳細に説明する。本発明において「～」はその端値を含む。すなわち「Ｘ～Ｙ」はＸおよびＹの値を含む。また、「ＸまたはＹ」はＸ、Ｙのいずれか１つ、あるいは双方を意味する。 The present invention will be explained in detail below. In the present invention, "~" includes the end value. That is, "X~Y" includes the values of X and Y. Moreover, "X or Y" means either one of X or Y, or both.
１．塗工紙
塗工紙とは原紙の上に、クリア塗工層、顔料塗工層等の塗工層を備える紙である。本発明の塗工紙は、ＪＩＳ－Ｐ８１４２による白紙光沢度が３０％未満、かつＩＳＯ １５３５９に準じて測定した静的摩擦係数および動的摩擦係数において、静的摩擦係数よりも大きい動的摩擦係数を有する。本発明の塗工紙は印刷用塗工紙であることが好ましく、印刷用塗工紙とは顔料塗工層を設けた用紙表面にオフセット印刷、グラビア印刷、オンデマンド印刷（レーザー方式、インクジェット方式、電子写真方式等）などの印刷方式による商業印刷等を施して用いられる用紙をいう。また塗工紙の用途は、例えばチラシ用紙、書籍用紙、文庫カバー用紙、新聞用紙などの各種印刷用紙、各種コピー用紙、各種インクジェット印刷用紙、感熱紙、感圧紙、クラフト用紙、圧着記録紙、包装用紙、紙容器原紙、板紙、薄葉紙、色上質紙、水溶紙、ファンシーペーパー、壁紙、繊維板、写真用紙、含浸用原紙、消臭紙、不燃紙、難燃紙、プリンテッドエレクトロニクス用紙、テープ用紙、封筒用紙、化粧材用紙、バッテリー用セパレーター、ＯＤＰ用紙、各種衛生用紙、たばこ用紙、カップ原紙、研磨紙、合成紙などが挙げられるが、これらに限定されない。中でも一態様において、本発明の塗工紙は、オフセット印刷やグラビア印刷等の各種印刷方式に供される印刷用紙として好適である。以下、印刷用塗工紙を例にして本発明の塗工紙を説明する。
1. Coated paper Coated paper is paper that has a coating layer such as a clear coating layer or a pigment coating layer on a base paper. The coated paper of the present invention has a white paper gloss of less than 30% according to JIS-P8142, and a dynamic friction coefficient larger than the static friction coefficient in the static friction coefficient and dynamic friction coefficient measured according to ISO 15359. has. The coated paper of the present invention is preferably a coated paper for printing, and the coated paper for printing refers to offset printing, gravure printing, on-demand printing (laser method, inkjet method) on the paper surface provided with a pigment coating layer. Refers to paper used for commercial printing using printing methods such as , electrophotography, etc.). Coated paper is used for various printing papers such as leaflet paper, book paper, paperback cover paper, newsprint, various copy papers, various inkjet printing papers, thermal paper, pressure-sensitive paper, craft paper, pressure-bonded recording paper, and packaging. Paper, base paper for paper containers, paperboard, tissue paper, colored wood-free paper, water-soluble paper, fancy paper, wallpaper, fiberboard, photo paper, base paper for impregnation, deodorizing paper, non-combustible paper, flame-retardant paper, printed electronics paper, tape paper Examples include, but are not limited to, envelope paper, decorative material paper, battery separator, ODP paper, various sanitary papers, cigarette paper, cup base paper, abrasive paper, and synthetic paper. In one embodiment, the coated paper of the present invention is suitable as a printing paper used in various printing methods such as offset printing and gravure printing. The coated paper of the present invention will be explained below using a coated paper for printing as an example.
（１）白紙光沢度
白紙光沢度はマット調の度合いを示す指標であり、本発明においてはＪＩＳ－Ｐ８１４２に従い測定される。本発明の印刷用塗工紙の白紙光沢度は３０％未満である。白紙光沢度の下限は限定されないが、１５％以上が好ましい。
(1) White paper glossiness White paper glossiness is an index indicating the degree of matte tone, and in the present invention, it is measured according to JIS-P8142. The white paper gloss of the coated printing paper of the present invention is less than 30%. Although the lower limit of the white paper glossiness is not limited, it is preferably 15% or more.
（２）印刷インキ受理性
印刷インキ受理性はインキの乾燥しやすさを示す指標であり、本発明においてはＪＡＰＡＮ ＴＡＰＰＩ 紙パルプ試験方法 Ｎｏ．４６に準じて測定される。具体的に印刷インキ受理性は、一定量のインキを紙に塗布し一定時間経過後に当該インキをふき取り、インキを塗布する前と後とでの白色度の違いにより評価される。値が高いほど、インキの乾燥性に優れることを意味する。本発明において印刷インキ受理性は２０以上が好ましく、２１以上がより好ましく、２２以上がさらに好ましい。また印刷インキ受理性は３５以下が好ましく、３１以下がより好ましく、３０以下がさらに好ましく、２５以下がよりさらに好ましい。印刷インキ受理性が２０未満であるとインキの乾燥性が十分ではない。一方、印刷インキ受理性が３５を超えるとインキの乾燥性が過剰となり、印刷光沢度が低下する。
(2) Printing ink receptivity Printing ink receptivity is an index showing how easily the ink dries, and in the present invention, JAPAN TAPPI Paper Pulp Test Method No. 46. Specifically, printing ink receptivity is evaluated by applying a certain amount of ink to paper, wiping off the ink after a certain period of time, and determining the difference in whiteness before and after applying the ink. The higher the value, the better the drying properties of the ink. In the present invention, the printing ink receptivity is preferably 20 or more, more preferably 21 or more, and even more preferably 22 or more. Moreover, the printing ink receptivity is preferably 35 or less, more preferably 31 or less, even more preferably 30 or less, and even more preferably 25 or less. If the printing ink receptivity is less than 20, the drying properties of the ink will not be sufficient. On the other hand, when the printing ink receptivity exceeds 35, the drying properties of the ink become excessive and the printing glossiness decreases.
（３）摩擦係数
本発明の印刷用塗工紙は静的摩擦係数よりも大きい動的摩擦係数を有する。摩擦係数はＩＳＯ １５３５９に準じて測定される。ＩＳＯ １５３５９では、同一サンプルを用いて静的摩擦係数および動的摩擦係数を３回ずつ測定し、静的摩擦係数については１回目と３回目の値を採用し、動的摩擦係数については３回目の値を採用する。本発明においては、静的摩擦係数については１回目の値を採用する。限定されないが、［（動的摩擦係数）－（静的摩擦係数）］／（静的摩擦係数）で算出される増加率が、２～２５％であることが好ましく、３～２０％であることがより好ましい。また、具体的な摩擦係数は限定されないが、静的摩擦係数は０．３～０．７であることが好ましく、０．４～０．６であることがより好ましい。摩擦係数がこの範囲にあると、前記の印刷前における不具合および印刷機内での不具合が解消される。
(3) Coefficient of Friction The coated paper for printing of the present invention has a coefficient of dynamic friction that is larger than a coefficient of static friction. The coefficient of friction is measured according to ISO 15359. In ISO 15359, the static friction coefficient and dynamic friction coefficient are measured three times each using the same sample, and the values of the first and third measurements are used for the static friction coefficient, and the values of the third measurement are used for the dynamic friction coefficient. Adopt the value of . In the present invention, the first value is used for the static friction coefficient. Although not limited, the increase rate calculated by [(dynamic friction coefficient) - (static friction coefficient)]/(static friction coefficient) is preferably 2 to 25%, and preferably 3 to 20%. It is more preferable. Although the specific friction coefficient is not limited, the static friction coefficient is preferably 0.3 to 0.7, more preferably 0.4 to 0.6. When the friction coefficient is within this range, the above-mentioned problems before printing and problems inside the printing machine are eliminated.
（４）原紙
１）パルプ
本発明の原紙には化学パルプ、機械パルプ、古紙パルプなど公知のパルプを使用できるが、化学パルプを使用することが好ましい。
化学パルプには、クラフトパルプ法により製造したものや、亜硫酸パルプ法により製造されたもの、晒化学パルプや未晒化学パルプ等があり、本発明においてはこれらを使用することができるが、クラフト法により製造した化学パルプが生産コストおよび品質の面から好適である。原料パルプに占める化学パルプの含有量は、白色度等の観点から、全パルプ中６０重量％以上であり、８０重量％以上がより好ましく、９０重量％以上がさらに好ましく、９５重量％以上が特に好ましい。
(4) Base Paper 1) Pulp Although known pulps such as chemical pulp, mechanical pulp, and waste paper pulp can be used for the base paper of the present invention, it is preferable to use chemical pulp.
Chemical pulp includes those manufactured by the kraft pulp method, those manufactured by the sulfite pulp method, bleached chemical pulp, unbleached chemical pulp, etc. These can be used in the present invention, but the kraft method The chemical pulp produced by the above method is preferable from the viewpoint of production cost and quality. The content of chemical pulp in the raw material pulp is 60% by weight or more in the total pulp from the viewpoint of whiteness etc., more preferably 80% by weight or more, further preferably 90% by weight or more, particularly 95% by weight or more. preferable.
２）填料
本発明においては原紙に公知の填料を用いてよい。
公知の填料としては、重質炭酸カルシム、軽質炭酸カルシウム、クレー、シリカ、軽質炭酸カルシウム－シリカ複合物、カオリン、焼成カオリン、デラミカオリン、ホワイトカーボン、タルク、炭酸マグネシウム、炭酸バリウム、硫酸バリウム、水酸化アルミニウム、水酸化カルシウム、水酸化マグネシウム、水酸化亜鉛、酸化亜鉛、酸化チタン、ケイ酸ナトリウムの鉱産による中和で製造される非晶質シリカ等の無機填料や、尿素－ホルマリン樹脂、メラミン系樹脂、ポリスチレン樹脂、フェノール樹脂などの有機填料が挙げられる。この中でも、中性抄紙やアルカリ抄紙における代表的な填料である重質炭酸カルシウムや軽質炭酸カルシウムが不透明度向上のためにも好ましく使用される。紙中填料率は特に制限されないが、１～４０重量％が好ましく、１０～３５重量％がさらに好ましい。
2) Filler In the present invention, a known filler may be used for the base paper.
Known fillers include heavy calcium carbonate, light calcium carbonate, clay, silica, light calcium carbonate-silica composite, kaolin, calcined kaolin, delamic kaolin, white carbon, talc, magnesium carbonate, barium carbonate, barium sulfate, and water. Inorganic fillers such as amorphous silica produced by neutralizing minerals such as aluminum oxide, calcium hydroxide, magnesium hydroxide, zinc hydroxide, zinc oxide, titanium oxide, and sodium silicate, urea-formalin resin, and melamine-based Examples include organic fillers such as resins, polystyrene resins, and phenolic resins. Among these, heavy calcium carbonate and light calcium carbonate, which are typical fillers for neutral papermaking and alkaline papermaking, are preferably used to improve opacity. The filler percentage in the paper is not particularly limited, but is preferably 1 to 40% by weight, more preferably 10 to 35% by weight.
３）その他
本発明においては、公知の製紙用添加剤も使用できる。
例えば、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、各種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。乾燥紙力向上剤としてはポリアクリルアミド、カチオン化澱粉などが挙げられ、湿潤紙力向上剤としてはポリアミドアミンエピクロロヒドリンなどが挙げられる。これらの薬品は地合や操業性などの影響の無い範囲で添加される。内添サイズ剤としてはアルキルケテンダイマーやアルケニル無水コハク酸、ロジンサイズ剤などが挙げられる。更に、染料、有色顔料、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。
3) Others In the present invention, known papermaking additives can also be used.
For example, internal additives for papermaking such as sulfuric acid, various anionic, cationic, nonionic, or amphoteric retention improvers, freeness improvers, various paper strength enhancers, and internal sizing agents are added as necessary. can be used. Examples of the dry paper strength improver include polyacrylamide and cationized starch, and examples of the wet paper strength improver include polyamidoamine epichlorohydrin. These chemicals are added within a range that does not affect the formation or operability. Examples of internally added sizing agents include alkyl ketene dimers, alkenyl succinic anhydrides, and rosin sizing agents. Furthermore, dyes, colored pigments, optical brighteners, pH adjusters, antifoaming agents, pitch control agents, slime control agents, etc. can also be added as necessary.
４）原紙の坪量
本発明の原紙の坪量は４０～１６０ｇ／ｍ２が好ましく、４５～１５０ｇ／ｍ２がより好ましく、５０～１３０ｇ／ｍ２がさらに好ましいが、それらに限定されない。また本発明の原紙は、単層抄きでも多層抄きでもよいが、単層抄きが好ましい。
4) Basis weight of base paper The basis weight of the base paper of the present invention is preferably 40 to 160 g/m 2 , more preferably 45 to 150 g/m 2 , even more preferably 50 to 130 g/m 2 , but is not limited thereto. Further, the base paper of the present invention may be made by single-layer papermaking or multi-layer papermaking, but single-layer papermaking is preferable.
（５）顔料塗工層
１）顔料
顔料塗工層とは顔料を含む塗工層である。顔料塗工層は１層であってもよく、２層以上であってもよい。
本発明においては公知の顔料を用いることができる。その例としては、カオリン、クレー、エンジニアードカオリン、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、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および密実型、中空型、またはコアーシェル型などの有機顔料が挙げられる。これらの顔料は複数種を組合せて使用してもよい。
(5) Pigment coating layer 1) Pigment The pigment coating layer is a coating layer containing a pigment. The number of pigment coating layers may be one, or two or more.
In the present invention, known pigments can be used. Examples include kaolin, clay, engineered kaolin, delaminated clay, heavy calcium carbonate, light calcium carbonate, talc, titanium dioxide, barium sulfate, calcium sulfate, zinc oxide, silicic acid, silicates, colloidal silica, satin. Examples include inorganic pigments such as white and organic pigments such as solid type, hollow type, or core-shell type. These pigments may be used in combination.
前記物性を達成するために、本発明においては、炭酸カルシウム、カオリン、またはクレーを用いることが好ましい。当該顔料の合計量は、顔料１００重量部あたり、２０重量部以上５０重量部未満であることが好ましく、２０～４８重量部がより好ましく、３０～４７重量部がさらに好ましい。炭酸カルシウムとしては重質炭酸カルシウム、軽質炭酸カルシウム等の炭酸カルシウムが好ましい。また、軽質炭酸カルシウムとしては、特許５２７４０７７号公報等に記載された、パルプ製造工程の苛性化工程で製造された軽質炭酸カルシウム（苛性化軽質炭酸カルシウム）を使用してもよい。 In order to achieve the above physical properties, calcium carbonate, kaolin, or clay is preferably used in the present invention. The total amount of the pigment is preferably 20 parts by weight or more and less than 50 parts by weight, more preferably 20 to 48 parts by weight, and even more preferably 30 to 47 parts by weight, per 100 parts by weight of the pigment. As the calcium carbonate, calcium carbonates such as heavy calcium carbonate and light calcium carbonate are preferable. Further, as the light calcium carbonate, light calcium carbonate (causticized light calcium carbonate) manufactured in the causticizing step of the pulp manufacturing process described in Japanese Patent No. 5274077 and the like may be used.
本発明においては、沈降法により粒度分布を測定した際に、粒子径が２μｍ以下の粒子の割合が８０％以上である顔料を使用することが好ましい。当該割合は８５％以上であることがより好ましく、９０％以上であることがさらに好ましい。沈降法による顔料の粒度分布は、島津製作所社製、セディグラフ５１００等により測定可能である。 In the present invention, it is preferable to use a pigment whose particle size distribution is measured by a sedimentation method and the ratio of particles having a particle diameter of 2 μm or less is 80% or more. The ratio is more preferably 85% or more, and even more preferably 90% or more. The particle size distribution of the pigment by the sedimentation method can be measured using Sedigraph 5100 manufactured by Shimadzu Corporation or the like.
本発明の顔料は、体積５０％平均粒子径（Ｄ５０）が、０．５～６．０μｍであることが好ましく、例えば炭酸カルシウムのＤ５０は、０．５～６．０μｍであることが好ましく、０．５～２．０μｍであることがより好ましい。カオリンまたはクレーのＤ５０は１．０～６．０μｍであることが好ましく、２．０～５．５μｍであることがより好ましい。これらの顔料の粒子径は、Ｍａｌｖｅｒｎ社製ＭａｓｔｅｒｓｉｚｅｒＳなどのレーザー回折式粒度分布測定機等により測定可能である。 The pigment of the present invention preferably has a 50% volume average particle diameter (D50) of 0.5 to 6.0 μm, for example, the D50 of calcium carbonate is preferably 0.5 to 6.0 μm, More preferably, the thickness is 0.5 to 2.0 μm. The D50 of kaolin or clay is preferably 1.0 to 6.0 μm, more preferably 2.0 to 5.5 μm. The particle size of these pigments can be measured using a laser diffraction particle size distribution analyzer such as Mastersizer S manufactured by Malvern.
２）接着剤
顔料塗工層はマトリックスとして接着剤（バインダー）を含む。本発明で使用する接着剤は限定されず、公知の接着剤を使用できる。接着剤としては、スチレン・ブタジエン系、スチレン・アクリル系、エチレン・酢酸ビニル系、ブタジエン・メチルメタクリレート系、酢酸ビニル・ブチルアクリレート系等の各種共重合、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等のラテックス；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、カルボキシ変性ポリビニルアルコール、アセトアセチル変性ポリビニルアルコール等のポリビニルアルコール類；カゼイン、大豆蛋白、合成蛋白等の蛋白質類；酸化澱粉、陽性澱粉、尿素燐酸エステル化澱粉、ヒドロキシエチルエーテル化澱粉などのエーテル化澱粉、デキストリン等の澱粉類；カルボキシメチルセルロース、ヒドロキシエチルセルロース、ヒドロキシメチルセルロース等のセルロース誘導体等が挙げられる。これらの複数種を組合せて使用できる。
2) Adhesive The pigment coating layer contains an adhesive (binder) as a matrix. The adhesive used in the present invention is not limited, and any known adhesive can be used. Adhesives include various copolymers such as styrene/butadiene, styrene/acrylic, ethylene/vinyl acetate, butadiene/methyl methacrylate, vinyl acetate/butyl acrylate, maleic anhydride copolymers, acrylic acid/methyl acrylate, etc. Latex such as methacrylate copolymers; Polyvinyl alcohols such as fully saponified polyvinyl alcohol, partially saponified polyvinyl alcohol, carboxy-modified polyvinyl alcohol, and acetoacetyl-modified polyvinyl alcohol; Proteins such as casein, soybean protein, and synthetic protein; Oxidation Starches such as starch, positive starch, etherified starch such as urea phosphate starch, hydroxyethyl etherified starch, and dextrin; cellulose derivatives such as carboxymethyl cellulose, hydroxyethyl cellulose, and hydroxymethyl cellulose, and the like. These types can be used in combination.
接着剤の量は、印刷適性、塗工適性の点から、顔料１００重量部に対して５～２０重量部であることが好ましく、８～１６重量部であることがより好ましい。接着剤の総量が２０重量部を越える場合、顔料塗工液の粘度が高くなり塗工時に操業トラブルが生じ易い。さらに、インキの乾燥性が低下する傾向が見られる。一方、接着剤の総量が５重量部未満であると十分な表面強度を得にくくなる。 From the viewpoint of printability and coating suitability, the amount of adhesive is preferably 5 to 20 parts by weight, more preferably 8 to 16 parts by weight, based on 100 parts by weight of pigment. When the total amount of the adhesive exceeds 20 parts by weight, the viscosity of the pigment coating liquid increases, and operational troubles are likely to occur during coating. Furthermore, there is a tendency for the drying properties of the ink to decrease. On the other hand, if the total amount of adhesive is less than 5 parts by weight, it becomes difficult to obtain sufficient surface strength.
本発明においては、前記物性を達成するために、全接着剤中２０～５５重量％のラテックスを含むことが好ましく、２５～４５重量％のラテックスを含むことが好ましい。また、２層以上の顔料塗工層を設けるときには、原紙から最も離れた最外顔料塗工層において、全接着剤中２０～８０重量％のラテックスを含むことが好ましく、２５～７５重量％のラテックスを含むことがさらに好ましく、２５～５５重量％のラテックスを含むことがより好ましい。他の接着剤としては澱粉類特に酸化澱粉やデキストリンを用いることが特に好ましい。澱粉類が好ましい理由として、ラテックスと比較すると澱粉類は顔料塗工液の保水性が高くなるため、原紙への塗工液の沈み込みが生じにくく、顔料塗工層で原紙を効果的に被覆することができる。言い換えれば、澱粉類を使用すると、顔料塗工層による原紙の被覆性が良好となる。その結果、印刷品質、特に印刷光沢度の向上と、インキ乾燥性の向上が期待できる。 In the present invention, in order to achieve the above-mentioned physical properties, the total adhesive preferably contains 20 to 55% by weight of latex, and preferably 25 to 45% by weight of latex. Furthermore, when two or more pigment coating layers are provided, the outermost pigment coating layer furthest from the base paper preferably contains 20 to 80% by weight of latex, and 25 to 75% by weight of the total adhesive. It is more preferable to contain latex, more preferably 25 to 55% by weight of latex. As the other adhesive, it is particularly preferable to use starch, especially oxidized starch and dextrin. The reason why starches are preferable is that compared to latex, starches have a higher water retention capacity for the pigment coating solution, making it difficult for the coating solution to sink into the base paper and effectively covering the base paper with the pigment coating layer. can do. In other words, the use of starches improves the coverage of the base paper with the pigment coating layer. As a result, it can be expected that print quality, especially print gloss, and ink drying properties will improve.
３）その他
顔料塗工層は、必要に応じて、分散剤、増粘剤、保水剤、消泡剤、耐水化剤、着色剤（染料、顔料）、蛍光染料等、通常の塗工紙用顔料に配合される各種助剤を含んでいてもよい。
3) Others The pigment coating layer may contain dispersants, thickeners, water retention agents, antifoaming agents, water resistance agents, colorants (dyes, pigments), fluorescent dyes, etc. for normal coated paper. It may also contain various auxiliaries that are mixed into the pigment.
２．製造方法
本発明の印刷用塗工紙は公知の方法で製造できるが、原紙上に、顔料と接着剤を含む顔料塗工液をブレード塗工することにより製造することが好ましい。
2. Manufacturing method The coated paper for printing of the present invention can be manufactured by a known method, but it is preferably manufactured by blade coating a pigment coating liquid containing a pigment and an adhesive onto a base paper.
（１）原紙の調製
原紙についてはすでに述べたとおりである。原紙は公知の抄紙方法で製造される。
例えば、トップワイヤー等を含む長網抄紙機、オントップフォーマー、ギャップフォーマ、丸網抄紙機、長網抄紙機と丸網抄紙機を併用した板紙抄紙機、ヤンキードライヤーマシン等を用いて行うことができる。抄紙時のｐＨは、酸性、中性、アルカリ性のいずれでもよいが、中性またはアルカリ性が好ましい。抄紙速度も特に限定されない。
(1) Preparation of base paper The base paper is as described above. The base paper is manufactured by a known papermaking method.
For example, using a Fourdrinier paper machine including a top wire, an on-top former, a gap former, a circular wire paper machine, a paperboard machine using a combination of a Fourdrinier paper machine and a circular wire paper machine, a Yankee dryer machine, etc. I can do it. The pH during papermaking may be acidic, neutral, or alkaline, but preferably neutral or alkaline. Paper making speed is also not particularly limited.
（２）原紙の平滑化処理
得られた原紙に顔料塗工液を塗工する前に、各種カレンダー装置により原紙に平滑化処理を施すことが好ましい。かかるカレンダー装置としては、スーパーカレンダー、ソフトカレンダー等の一般に使用されているカレンダー装置が適宜使用できる。カレンダー仕上げ条件としては、剛性ロールの温度、カレンダー圧力、ニップ数、ロール速度、カレンダー前の紙水分等が、要求される品質に応じて適宜選択される。
(2) Smoothing treatment of base paper Before applying a pigment coating liquid to the obtained base paper, it is preferable to perform a smoothing treatment on the base paper using various calender devices. As such a calender device, commonly used calender devices such as a super calender and a soft calender can be appropriately used. As the calender finishing conditions, the temperature of the rigid roll, the calender pressure, the number of nips, the roll speed, the paper moisture before the calender, etc. are appropriately selected depending on the required quality.
（３）顔料塗工液の調製
本発明の顔料塗工液は顔料、接着剤、および必要に応じて添加剤を水に分散または溶解することで調製できる。前述顔料塗工層を形成できるように各成分の配合は調整される。ブレード塗工を行う場合は、顔料塗工液の固形分濃度は４０～７０重量％が好ましく、より好ましくは６０～７０重量％である。顔料塗工液の粘度は室温にて６０ｒｐｍで測定したＢ型粘度が５００～３０００ｍＰａ・ｓの範囲であることが好ましい。
(3) Preparation of pigment coating solution The pigment coating solution of the present invention can be prepared by dispersing or dissolving the pigment, adhesive, and, if necessary, additives in water. The composition of each component is adjusted so that the pigment coating layer described above can be formed. When blade coating is performed, the solid content concentration of the pigment coating liquid is preferably 40 to 70% by weight, more preferably 60 to 70% by weight. The viscosity of the pigment coating liquid is preferably a type B viscosity in the range of 500 to 3000 mPa·s measured at 60 rpm at room temperature.
（４）塗工方法
塗工方法は限定されず、ロールコーター、ブレードコーター等の公知の塗工機を用いることができる。塗工速度も特に限定されないが、ブレードコーターの場合は４００～１８００ｍ／分、ロールコーターの場合は４００～２０００ｍ／分が好ましい。本発明においてはブレードコーターを用いることが好ましい。
(4) Coating method The coating method is not limited, and a known coating machine such as a roll coater or a blade coater can be used. The coating speed is also not particularly limited, but is preferably 400 to 1,800 m/min in the case of a blade coater, and 400 to 2,000 m/min in the case of a roll coater. In the present invention, it is preferable to use a blade coater.
顔料塗工層は１層または複数層設けることができる。また、原紙の上にクリア塗工層を設け、その上に顔料塗工層を設けてもよい。 One or more pigment coating layers can be provided. Alternatively, a clear coating layer may be provided on the base paper, and a pigment coating layer may be provided thereon.
本発明における顔料塗工層の塗工量（ｇ／ｍ２）は、片面あたり固形分で２ｇ／ｍ２以上が好ましく、５ｇ／ｍ２以上がより好ましく、１０ｇ／ｍ２以上がさらに好ましい。塗工量が５ｇ／ｍ２未満では、紙基材表面の凹凸を十分に覆うことができないため、印刷インキの受理性が著しく低下することがある。一方、顔料塗工層の塗工量は、５０ｇ／ｍ２以下が好ましく、４０ｇ／ｍ２以下がより好ましく、３５ｇ／ｍ２以下がさらに好ましい。 The coating amount (g/m 2 ) of the pigment coating layer in the present invention is preferably 2 g/m 2 or more, more preferably 5 g/m 2 or more, and even more preferably 10 g/m 2 or more in terms of solid content per side. If the coating amount is less than 5 g/m 2 , the unevenness on the surface of the paper base material cannot be sufficiently covered, so that the receptivity of printing ink may be significantly reduced. On the other hand, the coating amount of the pigment coating layer is preferably 50 g/m 2 or less, more preferably 40 g/m 2 or less, and even more preferably 35 g/m 2 or less.
本発明の印刷用塗工紙の坪量は、特に限定されないが、５０ｇ／ｍ２以上、２６０ｇ／ｍ２以下程度である。 The basis weight of the coated printing paper of the present invention is not particularly limited, but is about 50 g/m 2 or more and 260 g/m 2 or less.
（５）その他の工程
湿潤状態の塗工層を乾燥させる方法は限定されず、例えば蒸気加熱シリンダ、加熱熱風エアドライヤ、ガスヒータードライヤ、電気ヒータードライヤ、赤外線ヒータードライヤ等を用いることができる。
(5) Other Steps The method of drying the wet coating layer is not limited, and for example, a steam heating cylinder, heated hot air air dryer, gas heater dryer, electric heater dryer, infrared heater dryer, etc. can be used.
本発明の印刷用塗工紙は、湿潤状態の塗工層を乾燥させた後に各種カレンダー装置により平滑化処理を施してもよい。かかるカレンダー装置としては、スーパーカレンダー、ソフトカレンダー等の一般に使用されているカレンダー装置が適宜使用できる。カレンダー仕上げ条件としては、剛性ロールの温度、カレンダー圧力、ニップ数、ロール速度、カレンダー前の紙水分等が、要求される品質に応じて適宜選択される。 The coated paper for printing of the present invention may be subjected to a smoothing treatment using various calender devices after drying the wet coating layer. As such a calender device, commonly used calender devices such as a super calender and a soft calender can be appropriately used. As the calender finishing conditions, the temperature of the rigid roll, the calender pressure, the number of nips, the roll speed, the paper moisture before the calender, etc. are appropriately selected depending on the required quality.
以下に実施例を挙げて、本発明を具体的に説明するがこれらによって本発明は限定されない。重量部および重量％は固形分換算の値である。 The present invention will be specifically described below with reference to Examples, but the present invention is not limited by these. Weight parts and weight % are values in terms of solid content.
＜評価方法＞
（１）白紙光沢度
ＪＩＳ－Ｐ８１４２に基づいて測定した。
（２）印刷インキ受理性
ＪＡＰＰＡＮ ＴＡＰＰＩ 紙パルプ試験方法Ｎｏ．４６：紙及び板紙－印刷インキ受理性試験方法－Ｋ＆Ｎインキ法に基づいて測定した。白色度の測定はＵＶ光を含む条件（ＵＶ－Ｉｎ）で測定を行った。
（３）静的摩擦係数および動的摩擦係数
ＩＳＯ １５３５９に準じて測定した。ただし、３回の繰返し測定において、静的摩擦係数は１回目の測定値を採用し、動的摩擦係数は３回目の測定値を採用した。
<Evaluation method>
(1) White paper glossiness Measured based on JIS-P8142.
(2) Printing ink acceptability JAPPAN TAPPI Paper pulp test method No. 46: Paper and paperboard - Printing ink acceptability test method - Measured based on the K&N ink method. The whiteness was measured under conditions including UV light (UV-In).
(3) Static friction coefficient and dynamic friction coefficient Measured according to ISO 15359. However, in the three repeated measurements, the first measured value was used for the static friction coefficient, and the third measured value was used for the dynamic friction coefficient.
（４）インキ乾燥性
ローランド社製オフセット枚葉印刷機（４色）にてオフセット枚葉用インキ（東洋インキ製ＮＥＸ－Ｍ）を用い、印刷速度８０００枚／ｈｒでベタ部のインキ着肉濃度が墨２．００となる様に印刷したあと、墨ベタ印刷部を印刷直後から１０分ごとに指先で触り、インキ乾燥の速さの程度を官能評価した。評価が４、３であれば実用上問題はない。
４：きわめて良好
３：良好
２：若干劣る
１：劣る
(4) Ink drying properties Using offset sheet-fed ink (NEX-M manufactured by Toyo Ink) on a Roland offset sheet-fed printing machine (4 colors), at a printing speed of 8000 sheets/hr, ink deposition density in solid areas. After printing so that the ink was 2.00, the ink solid printing area was touched with a fingertip every 10 minutes immediately after printing to sensory-evaluate the degree of ink drying speed. If the evaluation is 4 or 3, there is no problem in practical use.
4: Very good 3: Good 2: Slightly poor 1: Poor
（５）インキ擦れ
ローランド社製オフセット枚葉印刷機（４色）にてオフセット枚葉用インキ（東洋インキ製ＮＥＸ－Ｍ）を用い、印刷速度８０００枚／ｈｒでベタ部のインキ着肉濃度が墨１．８０となる様に印刷したあと、ＪＩＳ Ｐ８１１１に基づき２４時間調湿し、学振型摩擦堅牢度試験機により、墨ベタ印刷部が白紙部に合わさるように５００ｇｆの荷重をかけて１回擦り合わせ、白紙部に転移したインキをインキ擦れとして目視評価した。評価が４、３であれば実用上問題はない。
４：きわめて良好
３：良好
２：若干劣る
１：劣る
(5) Ink rubbing When using offset sheet-fed ink (NEX-M manufactured by Toyo Ink) on a Roland offset sheet-fed printing machine (4 colors), the ink deposition density in the solid area was reduced at a printing speed of 8000 sheets/hr. After printing so that the ink was 1.80, the humidity was adjusted for 24 hours based on JIS P8111, and a load of 500 gf was applied using a Gakushin type friction fastness tester so that the black printed area was aligned with the blank area. The sheets were rubbed together several times, and the ink transferred to the white paper area was visually evaluated as ink rubbing. If the evaluation is 4 or 3, there is no problem in practical use.
4: Very good 3: Good 2: Slightly poor 1: Poor
（６）網点ムラ
ローランド社製オフセット枚葉印刷機（４色）にてオフセット枚葉用インキ（東洋インキ（株）製ＮＥＸ－Ｍ）を用い、印刷速度８０００枚／ｈｒでベタ部のインキ着肉濃度が藍１．６０、紅１．５０となる様に藍紅（ＣＭ）の順に印刷した。得られた印刷物の藍紅（ＣＭ）ハーフトーン（５０％）印刷部の着肉ムラを目視で評価した。評価が４、３であれば実用上問題はない。
４：きわめて良好
３：良好
２：若干劣る
１：劣る
(6) Halftone unevenness Using offset sheet-fed ink (NEX-M manufactured by Toyo Ink Co., Ltd.) on a Roland offset sheet-fed printing machine (4 colors), ink in the solid area was printed at a printing speed of 8000 sheets/hr. Printing was performed in the order of blue and red (CM) so that the ink density was 1.60 for blue and 1.50 for red. The inkling unevenness of the blue-red (CM) halftone (50%) printed portion of the obtained printed matter was visually evaluated. If the evaluation is 4 or 3, there is no problem in practical use.
4: Very good 3: Good 2: Slightly poor 1: Poor
（７）印刷光沢度（光沢度差）
ローランド社製オフセット枚葉印刷機（４色）にてオフセット枚葉用インキ（東洋インキ（株）製ＮＥＸ－Ｍ）を用い、印刷速度８０００枚／ｈｒでベタ部のインキ着肉濃度が藍１．６０、紅１．５０となる様に藍紅（ＣＭ）の順に印刷した。得られた印刷物の藍紅（ＣＭ）ベタ印刷部の光沢度を、ＪＩＳ Ｐ－８１４２に基づいて測定した。
印刷光沢度から白紙光沢度を差し引いた値を光沢度差とし、光沢度差が２５以上であれば印刷部と白紙部の光沢の差異が十分に得られており、実用上問題はない。
光沢度差（％）＝印刷光沢度（％）－白紙光沢度（％）
(7) Print glossiness (glossiness difference)
Using offset sheet-fed ink (NEX-M manufactured by Toyo Ink Co., Ltd.) on a Roland offset sheet-fed printing machine (4 colors), the ink density of the solid area was 1 indigo at a printing speed of 8000 sheets/hr. Indigo-red (CM) was printed in the order of .60, red 1.50. The glossiness of the blue-red (CM) solid printed area of the obtained printed matter was measured based on JIS P-8142.
The value obtained by subtracting the white paper gloss from the print gloss is defined as the gloss difference. If the gloss difference is 25 or more, a sufficient difference in gloss between the printed area and the white paper area has been obtained, and there is no problem in practical use.
Glossiness difference (%) = Print glossiness (%) - White paper glossiness (%)
（８）印刷操業性（紙揃い）
ローランド社製オフセット枚葉印刷機（４色）にてオフセット枚葉用インキ（東洋インキ（株）製ＮＥＸ－Ｍ）を用い、印刷速度８０００枚／ｈｒでベタ部のインキ着肉濃度が墨１．８０となるように５００部を印刷した後、印刷物の紙揃いを目視で評価した。評価が４、３であれば実用上問題はない。
４：きわめて良好
３：良好
２：若干劣る
１：劣る
(8) Printing operability (paper alignment)
An offset sheet-fed ink (NEX-M manufactured by Toyo Ink Co., Ltd.) was used on a Roland offset sheet-fed printing machine (4 colors) at a printing speed of 8000 sheets/hr, and the ink density of the solid area was 1 ink. After printing 500 copies so that the paper size was .80, the paper alignment of the printed matter was visually evaluated. If the evaluation is 4 or 3, there is no problem in practical use.
4: Very good 3: Good 2: Slightly poor 1: Poor
［実施例１］
顔料として重質炭酸カルシウムスラリー（ＩＭＥＲＹＳ社製、商品名：カービタル９７、粒子径が２μｍ以下の粒子の割合：９７％、Ｄ５０＝０．８６μｍ）５５重量部（固形分）および２級クレー（ＩＭＥＲＹＳ社製、商品名：ＫＣＳ、粒子径が２μｍ以下の粒子の割合：８５％、Ｄ５０＝４．９μｍ）４５重量部（固形分）を用い、これに接着剤としてスチレン・ブタジエン共重合ラテックスを４重量部、酸化澱粉（日本コーンスターチ（株）製、商品名：ＳＫ２００）を６重量部配合して、さらに水を加えて固形分濃度６６重量％の顔料塗工液１を得た。
[Example 1]
As a pigment, 55 parts by weight (solid content) of heavy calcium carbonate slurry (manufactured by IMERYS, trade name: Carbital 97, proportion of particles with a particle size of 2 μm or less: 97%, D50 = 0.86 μm) and secondary clay (IMERYS Company, product name: KCS, ratio of particles with a particle size of 2 μm or less: 85%, D50 = 4.9 μm) 45 parts by weight (solid content), and 45 parts by weight (solid content) of styrene-butadiene copolymer latex as an adhesive. 6 parts by weight of oxidized starch (manufactured by Nippon Cornstarch Co., Ltd., trade name: SK200) and water were further added to obtain pigment coating liquid 1 having a solid content concentration of 66% by weight.
原紙として、化学パルプ１００重量％、填料として軽質炭酸カルシウムを１３重量％含有した、密度０．７３ｇ／ｃｍ３、坪量９８ｇ／ｍ２の上質紙を準備した。当該原紙上に、顔料塗工液１をブレードコーターで片面あたりの乾燥塗工量が１５．０ｇ／ｍ２となるように両面塗工し、その後乾燥して印刷用塗工紙を得た。 As a base paper, wood-free paper containing 100% by weight of chemical pulp and 13% by weight of light calcium carbonate as a filler, having a density of 0.73 g/cm 3 and a basis weight of 98 g/m 2 was prepared. Pigment Coating Solution 1 was coated on both sides of the base paper using a blade coater so that the dry coating amount per side was 15.0 g/m 2 , and then dried to obtain a coated paper for printing.
［実施例２］
顔料として苛性化軽質炭酸カルシウムスラリー１（Ｄ５０＝１．０２μｍ）５５重量部（固形分）および２級クレー（ＩＭＥＲＹＳ社製、商品名：ＫＣＳ、Ｄ５０＝４．９μｍ）４５重量部（固形分）を用い、これに接着剤としてスチレン・ブタジエン共重合ラテックス１（Ａ＆Ｌ社製、商品名：ＰＢ１５３７）を４重量部、酸化澱粉（日本コーンスターチ社製、商品名：ＳＫ２００）を６重量部配合して、さらに水を加えて固形分濃度６６重量％の顔料塗工液１’を得た。
顔料塗工液１に代えて顔料塗工液１’を使用した以外は、実施例１と同様の方法にて印刷用塗工紙を得た。
[Example 2]
As pigments, 55 parts by weight (solid content) of causticized light calcium carbonate slurry 1 (D50=1.02 μm) and 45 parts by weight (solid content) of secondary clay (manufactured by IMERYS, trade name: KCS, D50=4.9 μm) and 4 parts by weight of styrene-butadiene copolymer latex 1 (manufactured by A&L, trade name: PB1537) and 6 parts by weight of oxidized starch (manufactured by Nippon Cornstarch Co., Ltd., trade name: SK200) as adhesives. Then, water was further added to obtain a pigment coating liquid 1' having a solid content concentration of 66% by weight.
A coated paper for printing was obtained in the same manner as in Example 1, except that pigment coating liquid 1' was used instead of pigment coating liquid 1.
［比較例１］
顔料として重質炭酸カルシウムスラリー（ＩＭＥＲＹＳ社製、商品名：カービタル９７、粒子径が２μｍ以下の粒子の割合：９７％、Ｄ５０＝０．８６μｍ）１００重量部（固形分）を用い、これに接着剤としてスチレン・ブタジエン共重合ラテックスを８重量部、酸化澱粉（日本コーンスターチ（株）製、商品名：ＳＫ２００）を６重量部配合して、さらに水を加えて固形分濃度６６重量％の顔料塗工液２を得た。顔料塗工液１に代えて顔料塗工液２を使用した以外は、実施例１と同様の方法にて印刷用塗工紙を得た。
[Comparative example 1]
As a pigment, 100 parts by weight (solid content) of heavy calcium carbonate slurry (manufactured by IMERYS, trade name: Carbital 97, proportion of particles with a particle size of 2 μm or less: 97%, D50 = 0.86 μm) was used, and adhered to this slurry. 8 parts by weight of styrene-butadiene copolymer latex and 6 parts by weight of oxidized starch (manufactured by Nippon Cornstarch Co., Ltd., trade name: SK200) were added as agents, and water was added to form a pigment coating with a solid content concentration of 66% by weight. Work solution 2 was obtained. A coated paper for printing was obtained in the same manner as in Example 1, except that Pigment Coating Solution 2 was used instead of Pigment Coating Solution 1.
［比較例２］
顔料として重質炭酸カルシウムスラリー（ＩＭＥＲＹＳ社製、商品名：カービタル９７、粒子径が２μｍ以下の粒子の割合：９７％、Ｄ５０＝０．８６μｍ）５５重量部（固形分）および２級クレー（ＩＭＥＲＹＳ社製、商品名：ＫＣＳ、粒子径が２μｍ以下の粒子の割合：８５％、Ｄ５０＝４．９μｍ）４５重量部（固形分）を用い、これに接着剤としてスチレン・ブタジエン共重合ラテックスを７重量部、酸化澱粉（日本コーンスターチ（株）社製、商品名：ＳＫ２００）を３重量部配合して、さらに水を加えて固形分濃度６６重量％の顔料塗工液３を得た。顔料塗工液１に代えて顔料塗工液３を使用した以外は、実施例１と同様の方法にて印刷用塗工紙を得た。
これらの結果を表１に示す。
[Comparative example 2]
As pigments, 55 parts by weight (solid content) of heavy calcium carbonate slurry (manufactured by IMERYS, trade name: Carbital 97, proportion of particles with a particle diameter of 2 μm or less: 97%, D50 = 0.86 μm) and secondary clay (IMERYS) were used as pigments. Company, product name: KCS, ratio of particles with a particle size of 2 μm or less: 85%, D50 = 4.9 μm) 45 parts by weight (solid content) was used, and 7 parts of styrene-butadiene copolymer latex was added as an adhesive to this. 3 parts by weight of oxidized starch (manufactured by Nippon Cornstarch Co., Ltd., trade name: SK200) were added, and water was further added to obtain pigment coating liquid 3 having a solid content concentration of 66% by weight. A coated paper for printing was obtained in the same manner as in Example 1, except that Pigment Coating Solution 3 was used instead of Pigment Coating Solution 1.
These results are shown in Table 1.
表１から、本発明の印刷用塗工紙は、マット調印刷用塗工紙であり、インキ速乾性に優れ、かつ静的摩擦係数よりも高い動的摩擦係数を有することが明らかである。 From Table 1, it is clear that the coated paper for printing of the present invention is a matte coated paper for printing, has excellent ink quick drying properties, and has a dynamic friction coefficient higher than the static friction coefficient.
Claims (5)
前記顔料がカオリンまたはクレーを含み、
前記顔料１００重量部に対して５～１０重量部の前記接着剤を含み、
前記接着剤が、全接着剤中、２０～５０重量％のラテックスを含み、
前記顔料塗工層の塗工量が片面当たり５～５０ｇ／ｍ２であり、
ＪＩＳ－Ｐ８１４２による白紙光沢度が３０％未満、かつ
ＩＳＯ １５３５９に準じて測定した静的摩擦係数および動的摩擦係数において、静的摩擦係数よりも大きい動的摩擦係数を有する、塗工紙。 It comprises base paper and a pigment coating layer containing pigment and adhesive provided on it,
the pigment contains kaolin or clay,
5 to 10 parts by weight of the adhesive based on 100 parts by weight of the pigment,
The adhesive contains 20 to 50% by weight of latex based on the total adhesive,
The coating amount of the pigment coating layer is 5 to 50 g/m 2 per side,
A coated paper having a white paper glossiness of less than 30% according to JIS-P8142, and a dynamic friction coefficient larger than the static friction coefficient in the static friction coefficient and dynamic friction coefficient measured according to ISO 15359.
前記顔料がカオリンまたはクレーを含み、
前記顔料１００重量部に対して５～１０重量部の前記接着剤を含み、
前記接着剤が、全接着剤中、２０～５０重量％のラテックスを含み、
前記顔料塗工層の塗工量が片面当たり５～５０ｇ／ｍ２である、
請求項１～４のいずれかに記載の塗工紙の製造方法。 It includes a process of applying a pigment coating liquid containing pigment and adhesive onto the base paper using a blade.
the pigment contains kaolin or clay,
5 to 10 parts by weight of the adhesive based on 100 parts by weight of the pigment,
The adhesive contains 20 to 50% by weight of latex based on the total adhesive,
The coating amount of the pigment coating layer is 5 to 50 g/m 2 per side.
A method for producing coated paper according to any one of claims 1 to 4.
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