JPH07216791A - Method for producing pigment-coated paper for printing - Google Patents
Method for producing pigment-coated paper for printingInfo
- Publication number
- JPH07216791A JPH07216791A JP1272994A JP1272994A JPH07216791A JP H07216791 A JPH07216791 A JP H07216791A JP 1272994 A JP1272994 A JP 1272994A JP 1272994 A JP1272994 A JP 1272994A JP H07216791 A JPH07216791 A JP H07216791A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- pigment
- coated paper
- printing
- paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000049 pigment Substances 0.000 title claims abstract description 74
- 238000007639 printing Methods 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000000576 coating method Methods 0.000 claims abstract description 120
- 239000011248 coating agent Substances 0.000 claims abstract description 104
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 72
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 35
- 239000010410 layer Substances 0.000 claims abstract description 32
- 239000011247 coating layer Substances 0.000 claims abstract description 25
- 239000000853 adhesive Substances 0.000 claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 230000007547 defect Effects 0.000 abstract description 24
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 26
- 238000000034 method Methods 0.000 description 18
- 239000005995 Aluminium silicate Substances 0.000 description 11
- 235000012211 aluminium silicate Nutrition 0.000 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 description 11
- 238000011156 evaluation Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 7
- 229920002472 Starch Polymers 0.000 description 6
- 239000004927 clay Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000008107 starch Substances 0.000 description 6
- 235000019698 starch Nutrition 0.000 description 6
- 238000003490 calendering Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000004816 latex Substances 0.000 description 3
- 229920000126 latex Polymers 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 206010016807 Fluid retention Diseases 0.000 description 2
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-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
- 238000007754 air knife coating Methods 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
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 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
- 238000013329 compounding Methods 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000007645 offset printing Methods 0.000 description 2
- 239000004584 polyacrylic acid Substances 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- -1 satin white Chemical compound 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000011115 styrene butadiene Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000011882 ultra-fine particle Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 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
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 108010073771 Soybean Proteins Proteins 0.000 description 1
- 239000004826 Synthetic adhesive Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000227 bioadhesive Substances 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide 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
- 238000009993 causticizing Methods 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000012669 liquid formulation Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000001254 oxidized starch Substances 0.000 description 1
- 235000013808 oxidized starch Nutrition 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 235000019710 soybean protein Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 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
- 238000012800 visualization Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Paper (AREA)
Abstract
(57)【要約】
【目的】本発明の目的は、ベントベレード塗布方式にお
いて特定の軽質炭酸カルシウムを用いることにより、ブ
レード塗布方式の致命的欠陥であるストリークやスクラ
ッチ等の塗布欠点を改良し、高効率で高品質な印刷顔料
塗被紙を得ることである。
【構成】原紙に少なくとも２層以上の顔料と接着剤を主
成分とする塗布層を有する印刷用顔料塗被紙において、
少なくとも塗布層の２層目以上をベントブレード塗工に
よって形成し、該ベントブレード塗工によって形成され
る塗布層と隣接する下塗層のスムースター平滑度を２０
０〜５００ｍｍＨｇとし、さらには上塗最上層の顔料と
して長径／短径＝５〜１０の範囲で、且つ３２５メッシ
ュ残査が０．１％以下である針状軽質炭酸カルシウムを
全顔料に対し１０〜４０重量％含有することによって達
成できる。
【効果】本発明の顔料塗被紙は、平滑性及び光沢に優
れ、塗布工程で塗布欠点が発生しない。(57) [Summary] [Object] The object of the present invention is to improve the coating defects such as streaks and scratches, which are fatal defects of the blade coating system, by using a specific light calcium carbonate in the bent verade coating system. To obtain an efficient and high quality printing pigment coated paper. A pigment coated paper for printing having a coating layer containing at least two layers of a pigment and an adhesive as main components on a base paper,
At least the second layer of the coating layer is formed by vent blade coating, and the smoother smoothness of the undercoat layer adjacent to the coating layer formed by the vent blade coating is 20.
Further, the needle-like light calcium carbonate having a major axis / minor axis = 5 to 10 and a 325 mesh residue of 0.1% or less as a pigment for the uppermost layer of the overcoat is 10 to 10% of all pigments. It can be achieved by containing 40% by weight. [Effect] The pigment-coated paper of the present invention has excellent smoothness and gloss and does not cause coating defects in the coating process.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、顔料を含有する塗布液
を原紙に塗布した印刷用顔料塗被紙、特にベントブレー
ドを用いて、インクの着肉ムラが少なく、表面の平滑性
及び光沢性に優れ、さらには塗布欠点のないアート・コ
ート紙等の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a pigment-coated paper for printing in which a coating solution containing a pigment is applied to a base paper, and in particular, a vent blade is used to reduce unevenness of ink inking, smoothness and gloss of the surface. The present invention relates to a method for producing art-coated paper or the like which has excellent properties and has no coating defects.
【０００２】[0002]
【従来の技術】従来より顔料塗被紙は、未塗布の上質紙
と比較して平滑性や光沢が高く、インクの吸収性が均一
であるため、多色用の印刷用紙として用いられている。
特に近年、印刷物の視覚化が進み、印刷用紙に対する要
求も多様化してきており、さらに印刷方式もグラビア・
輪転オフセット及び枚葉オフセット等多種にわたり、そ
れぞれの印刷方式に適合した特性を持つ印刷用紙の開発
が進んでいる。このような状況のなかで顔料塗布を行う
印刷用紙の塗布技術に対する要求は、インクの着肉ムラ
が少なく、表面の平滑性及び光沢性に優れ、さらには塗
布欠点のない製品を高い生産性下で得ることである。2. Description of the Related Art Conventionally, pigment-coated paper is used as a multi-color printing paper because it has higher smoothness and gloss than uncoated high-quality paper and has uniform ink absorption. .
In recent years, in particular, the visualization of printed matter has advanced, and the demand for printing paper has also diversified.
A wide variety of rotary offsets and sheet-fed offsets are being developed, and printing papers with characteristics suitable for each printing method are being developed. Under these circumstances, there is a demand for coating technology for printing paper that coats pigments with less unevenness of ink inking, excellent surface smoothness and glossiness, and high productivity of products without coating defects. Is to get at.
【０００３】このため、各種提案がされている。具体的
には、バインダー及び顔料面では特異なガラス転移点を
有するラテックスやサチンホワイト・超微粒子カオリン
・超微粒子炭酸カルシウム及びプラスチックピグメント
を配合するとか（例えば、特開昭４９−１１０９０６号
公報、特開昭５６−６８１８８号公報、特開昭５６−９
６９９１号公報、特開昭５６−１４８９９３号公報、特
開昭５７−６１７９１号公報等）、塗布方法ではブレー
ドコーターによる多層コーテイング法（例えば、特開昭
６１−６９８号公報・特開平５−５１８９８号公報・特
開平５−１０６２００号公報・特開平５−５９６９２号
公報）が、また仕上げ方法では高温カレンダーによる平
滑化仕上げ方法等（例えば、特開昭４９−２１２５２号
公報、特開昭５４−１２５７１２号公報等）、数多く提
案されている。Therefore, various proposals have been made. Specifically, for example, latex or satin white / ultrafine particle kaolin / ultrafine particle calcium carbonate and plastic pigment having a specific glass transition point in the binder and pigment surfaces may be blended (see, for example, JP-A-49-110906, JP-A-56-68188, JP-A-56-9
6991, JP-A-56-148993, JP-A-57-61791 and the like), and the coating method is a multilayer coating method using a blade coater (for example, JP-A-61-698 and JP-A-5-51898). JP-A-5-106200 and JP-A-5-59692), and as the finishing method, a smoothing finishing method using a high temperature calender (for example, JP-A-49-21252, JP-A-54-52). No. 125712, etc.) has been proposed.
【０００４】ところで、本発明では塗布量の比較的多い
アート・コート紙等の印刷用塗被紙の製造方法に関する
ものであるが、この品種区分は本業界においてはあまり
明確な統一規格はないが、一般的には片面でアート紙が
１７〜３０ｇ／ｍ2 、コート紙が１０〜１７ｇ／ｍ2 、
それ以下を軽量コート紙あるいは微塗工紙と分類してい
る。これは、基本的には印刷用塗被紙の品質が塗布量を
増やすのが最も効果的であるからである。また、同じ塗
布量においても一般に多層コーテイングにより得られる
塗被紙は、単層塗被紙に比べ表面の平滑性が高く、光沢
に優れていることは知られている。By the way, the present invention relates to a method for producing a coated paper for printing such as an art-coated paper having a relatively large coating amount, but this product type classification does not have a clear standard in the industry. , On one side, art paper is 17-30 g / m 2 , coated paper is 10-17 g / m 2 ,
Below that, it is classified as lightweight coated paper or lightly coated paper. This is because, basically, it is most effective for the quality of the coated paper for printing to increase the coating amount. Further, it is known that even with the same coating amount, coated paper generally obtained by multilayer coating has higher surface smoothness and excellent gloss as compared with single-layer coated paper.
【０００５】このような顔料塗布を行う印刷用紙の塗布
装置は多岐にわたるが、具体的には、エアナイフ塗布装
置・ロール塗布装置及びブレード塗布装置を挙げること
ができる。これらの塗布法の共通した特徴としては、顔
料を多量に含む分散液を比較的高速度で塗布を行えるこ
とである。しかしながら、これらの塗布装置では、種々
の問題を抱えている。[0005] There are various types of coating devices for printing paper for performing such pigment coating, and specific examples thereof include an air knife coating device, a roll coating device and a blade coating device. A common feature of these coating methods is that a dispersion containing a large amount of pigment can be coated at a relatively high speed. However, these coating devices have various problems.
【０００６】以下これらの塗布装置及び問題点を説明す
る。エアナイフ塗布装置では、過剰に塗布液を支持体に
供給した後、余剰の液を風圧により掻き落とす後計量型
の塗布装置のため、エアナイフ特有のパターンを塗布表
面に発生し易く、このことにより塗布層の表面の平滑性
・光沢性は著しく低下する。また、かかる塗布装置で
は、塗布速度を高速度化する場合、あるいは液濃度を高
濃度化する場合にはさらに風圧を高くする必要がある
が、風圧を大きくすると空気の流れの乱れが発生し、吹
き出しによる騒音も著しいものとなる。したがって、比
較的に高粘度の液を高速で塗布することが要求される昨
今の顔料塗被紙の製造には適さない。These coating devices and their problems will be described below. Since the air knife coating device is a post-measurement type coating device in which the coating liquid is excessively supplied to the support and then the excess liquid is scraped off by the wind pressure, a pattern peculiar to the air knife is likely to occur on the coating surface. The smoothness and gloss of the surface of the layer are significantly reduced. Further, in such a coating apparatus, when increasing the coating speed, or when increasing the liquid concentration, it is necessary to further increase the wind pressure, but when the wind pressure is increased, turbulence of the air flow occurs, The noise caused by the blowout is also significant. Therefore, it is not suitable for the recent production of pigment-coated paper, which requires a relatively high-viscosity liquid to be applied at a high speed.
【０００７】ロール塗布法は、ロールの組み合わせ等に
より様々な形式のものが存在するが、基本的には、複数
ロールを組み合わせてロール間での塗布液の転写により
液を計量し支持体に転写する塗布方法である。かかる塗
布方法は、筋状のロール特有のパターンを発生し易く、
また塗布ロール面と支持体の転写後の剥離の際に塗布面
の光沢、平滑性が低下し品質が低下するだけでなく、印
刷時にも重大な障害となる。この傾向は、液濃度あるい
は塗布速度を高くするとより顕著になる。There are various types of roll coating methods depending on the combination of rolls and the like. Basically, a plurality of rolls are combined and the coating liquid is transferred between the rolls to measure the liquid and transfer it to a support. It is a coating method. Such a coating method easily generates a pattern peculiar to a streak roll,
Further, when the coated roll surface and the support are peeled off after the transfer, not only the gloss and smoothness of the coated surface are deteriorated and the quality is deteriorated, but also a serious obstacle is caused during printing. This tendency becomes more remarkable when the liquid concentration or the coating speed is increased.
【０００８】上で説明したエアナイフ及びロール塗布装
置では、塗布速度はせいぜい７００ｍ／分が限度である
ため、１０００ｍ／分を越す塗布方式としては、結局の
ところより高濃度化が可能なブレード塗布装置のみとな
ってしまう。また、品質的にもブレードにより掻き落と
すため最も平滑がでやすい。In the air knife and roll coating apparatus described above, the coating speed is limited to at most 700 m / min. Therefore, as a coating method exceeding 1000 m / min, a blade coating apparatus capable of achieving a higher concentration is eventually used. It becomes only. Moreover, in terms of quality, the blade is scraped off, so that it is most smooth.
【０００９】しかしながら、ブレード塗布装置では、過
剰に塗布液を支持体に供給した後、余剰の液をブレード
により掻き落とす塗布装置のため、ストリークやスクラ
ッチ等の塗布欠点の発生が不可避である。However, in the blade coating device, since the coating liquid is excessively supplied to the support and the excess liquid is scraped off by the blade, coating defects such as streaks and scratches are unavoidable.
【００１０】特に、偏平な形状を持つ顔料（例えばデラ
ミネーションクレー）や針状の形状を持つ顔料（例えば
サチンホワイト）を配合した塗布液の場合、この傾向は
著しい。これは、ブレード先端直下の狭い間隙に液が引
き込まれるときに、クレーの配向が起こっておらず、液
の粘度が高くなり、ストリークやスクラッチが発生する
からである。This tendency is remarkable especially in the case of a coating liquid containing a pigment having a flat shape (for example, delamination clay) and a pigment having a needle shape (for example, Satin White). This is because when the liquid is drawn into the narrow gap just below the tip of the blade, the orientation of the clay does not occur, the viscosity of the liquid increases, and streaks and scratches occur.
【００１１】このように、ストリークやスクラッチが発
生すると、発生部分は全て損紙となるため、生産の効率
化やコストの面で大きな損失となる。また、これらの欠
点の発生は、塗布速度が高速化されるほど、さらには塗
布濃度が高くなるほど一層顕著なものとなり、生産の効
率化と品質の向上が両立しない。As described above, when streaks or scratches are generated, the generated portions are all wasted paper, which causes a large loss in terms of production efficiency and cost. Further, the occurrence of these defects becomes more remarkable as the coating speed is increased and the coating concentration is further increased, and it is not possible to improve the production efficiency and the quality at the same time.
【００１２】このような状況下において、ブレード塗工
に付随する塗布欠点を改善する方法としては幾つかの提
案がなされている。例えば、塗被液の保水性に着目し、
塗被液がアプリケートされてからブレードにより掻き落
とされ、レベリングされるまでの時間に塗被液中の水分
が吸収され、塗布層液の固形分濃度が高くなることをに
よる高粘度化を防止するとか（例えば、特開平３−５９
１９５号公報）。ブレード塗工を実施する前の塗布層表
面を硬質粗面化ロールで表面処理する、あるいは鋭角を
有しない球冠状及び／叉は球帯状からなる型をロール周
面に有する型付けロールと対向ロールとから形成される
ニップ間に通紙して粗面化処理する（例えば、特開平５
−５１８９８号公報・特開平５−１０６２００号公
報）。さらには、下塗り層の顔料に少なくとも１０重量
％の澱粉粒子を含有させる（例えば、特開平５−５９６
９２号公報）等、数多く提案されている。Under these circumstances, several proposals have been made as methods for improving coating defects associated with blade coating. For example, focusing on the water retention of the coating liquid,
The coating liquid is scraped off by the blade after being applied, and the moisture in the coating liquid is absorbed during the time until leveling, preventing the viscosity from increasing due to the increase in the solid content concentration of the coating layer liquid. Then (for example, JP-A-3-59)
195). The surface of the coating layer before the blade coating is surface-treated with a hard roughening roll, or a forming roll and a facing roll having a spherical crown-shaped or / or spherical strip-shaped mold having no acute angle on the roll peripheral surface. Paper is passed through a nip formed from the sheet to perform a roughening treatment (for example, Japanese Patent Laid-Open No.
-51898 / JP-A-5-106200). Further, the pigment of the undercoat layer contains at least 10% by weight of starch particles (for example, JP-A-5-596).
92) and many others have been proposed.
【００１３】しかしながら、印刷用顔料塗被紙を高効率
で製造するにあたって、特に多層塗工紙におけるブレー
ド塗工においては、未だに十分満足できる方法が見いだ
されていないのが実状である。However, in the case of producing the pigment coated paper for printing with high efficiency, particularly in the blade coating of the multi-layer coated paper, a satisfactory method has not been found yet.
【００１４】[0014]
【発明が解決しようとする課題】本発明の目的は、ブレ
ードコーターでストリークやスクラッチの発生といった
塗布欠点を起こすことなく、優れた印刷用塗被紙を効率
良く製造する方法を提供する物である。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for efficiently producing an excellent coated paper for printing without causing coating defects such as streaks and scratches in a blade coater. .
【００１５】一般に、上述した製造方法では、ブレード
塗工する前に、ブレード先端と支持体との間で塗布液に
大きなずり応力がかかり増粘したり、２次凝集粒子を生
成したり、また塗布液や原紙からの異物が抜け難くなっ
て、塗工面にストリークやスクラッチ等の各種塗布欠点
が発生し、トラブルの原因になることから、莫大な不良
紙を発生するばかりでなく、場合によっては塗工機を停
止せざるを得なくなる。Generally, in the above-mentioned manufacturing method, a large shear stress is applied to the coating liquid between the tip of the blade and the support to increase the viscosity or to generate secondary agglomerated particles before the blade coating, and Foreign matter from the coating liquid or base paper becomes difficult to come off, and various coating defects such as streaks and scratches occur on the coated surface, causing troubles. I have no choice but to stop the coating machine.
【００１６】そこで本発明者は、特定の形状を有する軽
質炭酸カルシウムと残査を規定することによって、スト
リークやスクラッチ等の塗布欠点を防止できるだけでは
なく、高品質のな印刷用顔料塗被紙を高効率で製造する
方法を見いだしたものである。Therefore, the present inventor not only can prevent coating defects such as streaks and scratches by defining light calcium carbonate having a specific shape and a residue, but can also provide a high-quality pigment coated paper for printing. This is a method for manufacturing with high efficiency.
【００１７】[0017]
【課題を解決するための手段】本発明者は、これらの問
題を解決すべく鋭意検討した結果、品質と効率の両者を
満足させる手段としてはブレードコーターを用いた多層
塗被紙としなければならないという結論に達した。As a result of intensive studies to solve these problems, the inventor of the present invention must use a multi-layer coated paper using a blade coater as a means for satisfying both quality and efficiency. I reached the conclusion.
【００１８】即ち、原紙に少なくとも２層以上の顔料と
接着剤を主成分とする塗布層を有する印刷用顔料塗被紙
において、少なくとも塗布層の２層目以上をベントブレ
ード塗工によって形成し、該ベントブレード塗工によっ
て形成される塗布層と隣接する下塗層のスムースター平
滑度を２００〜５００ｍｍＨｇとし、さらには上塗最上
層の顔料として長径／短径＝５〜１０の範囲で、且つ３
２５メッシュ残査が０．１％以下である針状軽質炭酸カ
ルシウムを全顔料に対し１０〜４０重量％含有させるこ
とにより、ブレード塗布方式の致命的欠陥であるストリ
ークやスクラッチ等を改良し、塗布欠点がなく、高品質
な印刷用顔料塗被紙を得ることができる。That is, in a pigment coated paper for printing having a coating layer containing at least two layers of a pigment and an adhesive as main components on the base paper, at least the second layer of the coating layer is formed by vent blade coating, The smoother smoothness of the undercoat layer adjacent to the coating layer formed by the vent blade coating is 200 to 500 mmHg, and further, as the pigment of the uppermost coating layer, the major axis / minor axis = 5 to 10, and 3
By containing 10 to 40% by weight of acicular light calcium carbonate having a 25-mesh residue of 0.1% or less with respect to all pigments, streak, scratch, etc., which are fatal defects of the blade coating method, are improved and applied. It is possible to obtain a high-quality pigment-coated paper for printing without defects.
【００１９】ブレードコーターにはいろいろのタイプが
あるが大別すると、ベベルブレードまたはリジットブレ
ード（剛直ブレード）とベントブレード（屈曲ブレー
ド）に分類される。前者は、ブレードの先端を斜めに切
った剛直な圧力をかけても曲がらないブレードで、ブレ
ードの先端面を支持体と平行にして用いるものである。
後者は、圧力がかかるとブレードが曲がり、ブレードの
先端に近い圧着部分は支持体と平行に近づくようにな
る。ベントブレードは、ベベルブレードよりも塗工量が
多いため、一般的には塗工量が１２ないし１７ｇ／ｍ2
以下の場合は前者で、塗工量が１５ないし２０ｇ／ｍ2
以上の場合は後者の塗布装置が用いれらる。こららの塗
布方法には各々長所短所があるため、各社工夫して使わ
れているようであるが、詳細については原崎勇次著「コ
ーテイング装置と操作技術入門」を参照されたい。There are various types of blade coaters, which are roughly classified into bevel blades or rigid blades (rigid blades) and bent blades (bending blades). The former is a blade in which the tip of the blade is cut obliquely and does not bend even when a rigid pressure is applied, and the tip surface of the blade is used in parallel with the support.
In the latter, the blade bends when pressure is applied, and the crimped portion near the tip of the blade comes closer to parallel to the support. Since the vent blade has a larger coating amount than the bevel blade, the coating amount is generally 12 to 17 g / m 2
In the following cases, the former is applied and the coating amount is 15 to 20 g / m 2
In the above case, the latter coating device can be used. Since each of these coating methods has advantages and disadvantages, it seems that each company is devised and used, but for details, refer to Yuji Harasaki, "Introduction to Coating Equipment and Operation Techniques".
【００２０】本発明者等は、上記で述べたベベルブレー
ドとベントブレード塗布法を用いて種々配合を検討し
た。その結果、高濃度塗工においては前者が後者を上回
るメリットを見いだしたものの、インキ着肉に相関が大
きい塗布量のバラツキ及び肉眼で評価する面質レベル
（この場合、スムースター平滑度・ベック平滑度及び光
沢度等、本業界で用いる一般測定機器では評価しきれな
い面感及び風合をさす）から言えばベントブレード塗布
法の方が優位性が高いことが判明した。そこで本発明で
は、少なくとも塗布層の２層目以上をベントブレード塗
工することによって、本発明に至った。The present inventors examined various formulations using the above-mentioned bevel blade and vent blade coating methods. As a result, although the former found advantages over the latter in high-density coating, there was a large variation in the amount of ink that had a large correlation with ink deposition and the surface quality level evaluated by the naked eye (in this case, smoother smoothness / Beck smoothness). It was found that the vent blade coating method is more superior in terms of surface feeling and texture that cannot be evaluated by general measuring instruments used in this industry, such as the degree of gloss and gloss. Therefore, in the present invention, the present invention was achieved by applying a vent blade coating to at least the second layer of the coating layer.
【００２１】本発明では、平滑性及び光沢性を確保する
ため多層コーテイングを用いるが、多層コーテイングは
上塗層のバインダーが表面層にマイグレーションしやす
いためインキの着肉ムラが発生しやすいという欠点をも
つ。これを防ぐためにインキ着肉の良い軽質炭酸カルシ
ウムを用いるが、通常の軽質炭酸カルシウムではカオリ
ン等に比べ平滑性や光沢性は低下しやすい。そこで、長
径／短径＝５〜１０の範囲である針状軽質炭酸カルシウ
ムを用いるとともに、ベベルブレード塗工より塗布量の
バラツキが少なく面質が良好なベントブレード塗布法に
よって着肉ムラを改良したものである。In the present invention, a multi-layer coating is used in order to secure smoothness and glossiness. However, in the multi-layer coating, the binder of the overcoat layer easily migrates to the surface layer, so that ink unevenness is likely to occur. Hold. In order to prevent this, light calcium carbonate with good ink adhesion is used, but with ordinary light calcium carbonate, the smoothness and glossiness are likely to deteriorate as compared with kaolin and the like. Therefore, the acicular light calcium carbonate in the range of major axis / minor axis = 5 to 10 is used, and unevenness of inking is improved by a vent blade coating method that has less variation in coating amount than the bevel blade coating and has good surface quality. It is a thing.
【００２２】本発明では、長径／短径＝５未満のものを
用いた場合は、顔料の配向性がでないため平滑性及び光
沢性が発現しにくい。一方、長径／短径＝１０を越える
場合は、顔料の配向性が向上するため平滑性及び光沢性
は良好となるが、デラミネーションクレーやサチンホワ
イト同様に、ブレード先端直下の狭い間隙に液が引き込
まれるときに、クレーの配向が乱れ、液の粘度が高くな
り、ストリークやスクラッチが発生しやすくなる。従っ
て、本発明者等は軽質炭酸カルシウムの結晶構造の違い
によって、インキ着肉・平滑性及び光沢性等の印刷適性
とストリーク性のバランスを見いだした。In the present invention, in the case where the major axis / minor axis = less than 5 is used, the smoothness and the glossiness are not easily expressed because the pigment has no orientation. On the other hand, when the ratio of major axis / minor axis = 10 is exceeded, the orientation of the pigment is improved and the smoothness and gloss are improved, but as with delamination clay and satin white, the liquid remains in the narrow gap just below the blade tip. When drawn, the orientation of the clay is disturbed, the viscosity of the liquid increases, and streaks and scratches easily occur. Therefore, the present inventors have found a balance between the printability such as ink inking / smoothness and glossiness and the streak property depending on the crystal structure of light calcium carbonate.
【００２３】しかしながら、針状軽質炭酸カルシウムの
長径／短径＝５〜１０の範囲としてもストリークが発生
する場合があるが、本発明者等は篩いの網目の大きさを
規定することによってこれらの問題を解決した。即ち、
３２５メッシュ残査を０．１％以下好ましくは０．０３
％以下とすることによって、ブレード塗布方式の致命的
欠陥であるストリークやスクラッチ等を改良することが
できた。However, streak may occur even when the major axis / minor axis of the acicular light calcium carbonate is in the range of 5/10. However, the inventors of the present invention have determined that the size of the mesh of the sieve defines these. Solved the problem. That is,
325 mesh residue is 0.1% or less, preferably 0.03
By setting it to be not more than%, it was possible to improve streak, scratch and the like which are fatal defects of the blade coating method.
【００２４】３２５メッシュ残査が０．１％を越える場
合は、軽質炭酸カルシウムの凝集物や微小な金属・その
他の鉱物あるいはプラスチック等の異物が混在してお
り、これがストリークやスクラッチの種になるからと考
えられる。If the 325 mesh residue exceeds 0.1%, agglomerates of light calcium carbonate and minute foreign substances such as metals, other minerals, plastics, etc. are mixed, and this becomes a seed of streaks and scratches. Thought to be from.
【００２５】この場合、塗被液中に混在する異物の大き
さと塗工時の水込み状態での塗層厚さに密接な関係があ
る。理論的には、異物の大きさが水込み状態での塗層厚
さよりも小さい場合はストリークは発生せず、大きい場
合はストリークが発生することになる。具体的には、本
発明では片面当たりの塗布量が１０数ｇ／ｍ2 から２０
数ｇ／ｍ2 であるので、水込み状態での塗層厚さはおお
よそ３０μｍ以下である。In this case, there is a close relationship between the size of foreign substances mixed in the coating liquid and the thickness of the coating layer in a water-containing state during coating. Theoretically, streak does not occur when the size of the foreign matter is smaller than the coating layer thickness in the water-containing state, and streaks occur when the size is large. Specifically, in the present invention, the coating amount per one surface is 10 and several g / m 2 to 20.
Since it is several g / m 2 , the coating layer thickness in the water-containing state is about 30 μm or less.
【００２６】一方、塗被液を３２５メッシュを通過させ
た場合は、異物の大きさは最大、篩い網目の開度４４μ
ｍとなる。この条件だけでは、異物の大きさは水込み状
態での塗層厚さよりも大きいためストリークが発生する
はずであるが、実際にはフイルムとちがって下塗層の表
面はかなり大きな凹凸があるため、確率的には針状軽質
炭酸カルシウムの３２５メッシュ残査を０．１％以下と
することによってストリークを著しく改良することがで
きた。On the other hand, when the coating liquid is passed through 325 mesh, the size of foreign matter is the maximum and the opening size of the sieve mesh is 44 μm.
m. Under this condition alone, streaks should occur because the size of foreign matter is larger than the thickness of the coating layer in the wet state, but in reality, unlike the film, the surface of the undercoat layer has considerably large irregularities. Probabilistically, the streak could be remarkably improved by setting the 325 mesh residue of acicular light calcium carbonate to 0.1% or less.
【００２７】本発明では、これらの条件を満足させ、さ
らに下塗層の平滑を規定することによって、発明を完成
うるに至った。即ち、下塗層の平滑度が５００ｍｍＨｇ
を越えてくると下塗層の表面の凹凸が大きくなるためス
トリークは発生しにくくなるが、反対に下塗層の平滑度
が２００ｍｍＨｇ未満では平滑性は良好となるものの表
面の凹凸が小さすぎるためストリークが発生しやすくな
る。但し、平滑度が５００ｍｍＨｇを越える場合は上塗
後の平滑性及び光沢性が劣ってしまうため、本発明で規
定する範囲２００〜５００ｍｍＨｇにしなけれんばなら
ない。In the present invention, the invention can be completed by satisfying these conditions and further defining the smoothness of the undercoat layer. That is, the smoothness of the undercoat layer is 500 mmHg
If it exceeds the range, streaks are less likely to occur because the surface roughness of the undercoat layer becomes large, but conversely, if the smoothness of the undercoat layer is less than 200 mmHg, the smoothness is good but the surface roughness is too small. Streaks are more likely to occur. However, if the smoothness exceeds 500 mmHg, the smoothness and glossiness after topcoating will be inferior, so the range specified in the present invention must be 200-500 mmHg.
【００２８】上記の条件において、針状軽質炭酸カルシ
ウムを全顔料に対し１０〜４０重量％含有させることに
より、ストリークとインキ着肉ムラを含む品質のバラン
スをとることができるものである。即ち、全顔料に対し
１０重量％未満ではインキ着肉の改善が望めず、４０重
量％を越える場合は、ストリークやスクラッチが発生し
やすく、さらには他の顔料とりわけカオリンに比べて、
平滑性及び光沢性が発現しにくくなる。Under the above conditions, the acicular light calcium carbonate is contained in an amount of 10 to 40% by weight with respect to the total pigment, so that the quality including streak and ink unevenness can be balanced. That is, if it is less than 10% by weight with respect to the total pigment, it is not expected to improve the ink inking, and if it exceeds 40% by weight, streaks and scratches are likely to occur, and further, compared with other pigments, especially kaolin,
Smoothness and gloss are less likely to develop.
【００２９】以上説明してきたように、原紙に少なくと
も２層以上の顔料と接着剤を主成分とする塗布層を有す
る印刷用顔料塗被紙において、少なくとも塗布層の２層
目以上をベントブレード塗工によって形成し、該ベント
ブレード塗工によって形成される塗布層と隣接する下塗
層のスムースター平滑度を２００〜５００ｍｍＨｇと
し、さらには上塗最上層の顔料として長径／短径＝５〜
１０の範囲で、且つ３２５メッシュ残査が０．１％以下
である針状軽質炭酸カルシウムを全顔料に対し１０〜４
０重量％含有させることより、ブレード塗布方式の致命
的欠点であるストリークやスクラッチ等を改良し、塗布
欠点がなく、高品質な印刷用顔料塗被紙を得ることがで
きた。As described above, in the pigment coated paper for printing having the coating layer containing at least two layers of the pigment and the adhesive as the main components on the base paper, at least the second layer or more of the coating layer is coated with the vent blade. Of the coating layer formed by the bent blade coating and the adjacent undercoat layer having a smoother smoothness of 200 to 500 mmHg, and further, as a pigment of the uppermost coating layer, major axis / minor axis = 5.
10 to 4 of acicular light calcium carbonate having a 325 mesh residue of 0.1% or less based on all pigments.
By containing 0% by weight, streak, scratch, etc., which are fatal defects of the blade coating method, were improved, and it was possible to obtain a high quality pigment-coated paper for printing without coating defects.
【００３０】本発明で用いる針状軽質炭酸カルシウム
は、具体的には生石灰を水和し、消石灰スラリーとし、
これをパルプ化工程の苛性化キルン廃ガス等を導入する
ことにより製造できる。所望の軽質炭酸カルシウムを得
るには、消石灰スラリー濃度・反応ガス流量・攪拌条件
の調整及び原材料の純度等によって、さらには湿式粉砕
等により粒径を揃えて、篩いにより濾過し、得ることが
できる。また、これらの他に石灰乳ソーダ化合法・塩化
カルシウム化合法等の公知の合成法によっても得ること
ができる。The acicular light calcium carbonate used in the present invention is specifically hydrated quicklime to obtain a slaked lime slurry,
This can be produced by introducing causticizing kiln waste gas in the pulping process. In order to obtain the desired light calcium carbonate, it can be obtained by adjusting the concentration of slaked lime slurry, the flow rate of reaction gas, the stirring conditions, the purity of raw materials, etc., and further by adjusting the particle size by wet pulverization etc. and filtering it with a sieve. . In addition to these, it can also be obtained by a known synthesis method such as a lime milk soda compounding method or a calcium chloride compounding method.
【００３１】本発明で規定する長径／短径は、電子顕微
鏡を用いて１万倍の倍率で撮影した電顕写真による値か
ら計算したものである。尚、この場合針状軽質炭酸カル
シウムの短径がほぼ０．２μｍであったので、長径のみ
を測定し、長径／短径＝長径／０．２で計算した。The major axis / minor axis defined in the present invention is calculated from the values obtained by an electron microscope photograph taken with an electron microscope at a magnification of 10,000 times. In this case, since the minor axis of the acicular light calcium carbonate was about 0.2 μm, only the major axis was measured, and the major axis / minor axis = major axis / 0.2 was calculated.
【００３２】本発明において、顔料を主成分とする塗布
液とは、顔料とバインダー、その他添加剤と共に水に溶
解もしくは分散せしめた液であって、顔料、バインダ
ー、その他添加剤の濃度が、１０〜７０重量％のものを
言う。顔料、バインダーの配合割合は、一般に顔料１０
０重量部に対し、バインダーが５重量部以上、好ましく
は、１０〜７０重量部であることが望ましい。In the present invention, the coating liquid containing a pigment as a main component is a liquid in which the pigment, the binder and other additives are dissolved or dispersed in water, and the concentration of the pigment, the binder and the other additives is 10%. ~ 70% by weight. The mixing ratio of the pigment and the binder is generally 10 for the pigment.
The amount of the binder is 5 parts by weight or more, preferably 10 to 70 parts by weight, based on 0 parts by weight.
【００３３】本発明では、本発明で用いる針状軽質炭酸
カルシウム以外に、通常の軽質炭酸カルシウム、重質炭
酸カルシウム、カオリン、クレー、サチンホワイト、酸
化チタン、水酸化アルミニウム、酸化亜鉛、硫酸バリウ
ム、硫酸カルシウム、シリカ、活性白土、レーキ、プラ
スチックピグメント等の顔料が挙げられる。In the present invention, in addition to the acicular light calcium carbonate used in the present invention, ordinary light calcium carbonate, heavy calcium carbonate, kaolin, clay, satin white, titanium oxide, aluminum hydroxide, zinc oxide, barium sulfate, Examples include pigments such as calcium sulfate, silica, activated clay, lakes, and plastic pigments.
【００３４】本発明に用いられるバインダーとしては、
スチレン・ブタジエン系、酢ビ・アクリル系、エチレン
・酢ビ系、ブタジエン・メチルメタクリル系、酢ビ・ブ
チルアクリレート系等の各種共重合体、ポリビニルアル
コール、無水マレイン酸共重合体、イソブテン・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
系共重合体等の合成系接着剤、酸化澱粉、エーテル化澱
粉、エステル化澱粉、酵素変性澱粉やそれらをフラッシ
ュドライして得られる冷水可溶性澱粉、カゼイン、大豆
蛋白等の天然系接着剤などのような一般に知られた接着
剤が挙げられる。また、必要に応じて、増粘剤、保水
剤、耐水化剤、着色剤等の通常の塗被紙用顔料に配合さ
れる各種助剤が適宜使用できる。As the binder used in the present invention,
Various copolymers of styrene / butadiene, vinyl acetate / acrylic, ethylene / vinyl acetate, butadiene / methyl methacrylic, vinyl acetate / butyl acrylate, polyvinyl alcohol, maleic anhydride copolymer, isobutene / maleic anhydride Acid-based copolymers, synthetic adhesives such as acrylic acid / methyl methacrylate-based copolymers, oxidized starch, etherified starch, esterified starch, enzyme-modified starch and cold water-soluble starch obtained by flash-drying them, casein, Examples include commonly known adhesives such as natural adhesives such as soybean protein. Further, if necessary, various auxiliaries such as a thickener, a water retention agent, a water resistance agent, a colorant and the like, which are mixed with a usual pigment for coated paper, can be appropriately used.
【００３５】かくして得られた本発明の塗被組成物は、
支持体の両面ないし片面に、多層コーティングされるも
のである。多層塗布における下層部の塗布には、ブレー
ド塗布装置以外の塗布装置の使用も可能である。The coating composition of the present invention thus obtained is
A multilayer coating is provided on both sides or one side of the support. A coating device other than the blade coating device can be used for coating the lower layer portion in the multilayer coating.
【００３６】本発明で使用される原紙は、パルプとして
はＮＢＫＰ・ＬＢＫＰ・ＮＢＳＰ・ＬＢＳＰ・ＧＰ・Ｔ
ＭＰ及び古紙パルプ等を含み、重質炭酸カルシウム・沈
降性炭酸カルシウム・タルク・カオリン・二酸化チタン
等の各種填料、歩留り向上剤、ろ水向上剤、紙力向上剤
や内添サイズ剤等の抄紙用内添助剤が必要に応じて適宜
選択して使用される。本発明の抄紙方法については、長
網抄紙機、ツインワイヤー抄紙機、コンビネーション抄
紙機、丸網抄紙機、ヤンキー抄紙機等を適宜使用でき
る。The base paper used in the present invention is, as pulp, NBKP / LBKP / NBSP / LBSP / GP / T.
Paper including MP, waste paper pulp, various fillers such as heavy calcium carbonate, precipitated calcium carbonate, talc, kaolin, titanium dioxide, yield improver, drainage improver, paper strength improver and internal sizing agent. An internal additive agent is appropriately selected and used as necessary. For the paper making method of the present invention, a Fourdrinier paper machine, a twin wire paper machine, a combination paper machine, a round net paper machine, a Yankee paper machine, and the like can be appropriately used.
【００３７】本発明において、顔料を主成分とする塗布
液の塗布量は乾燥重量規準で、片面１０ｇ／ｍ2以上、
好ましくは、１５〜３０ｇ／ｍ2が適当である。下塗及
び上塗の塗工、乾燥後の仕上げ方法は、通常用いられる
スーパーカレンダー・ソフトカレンダー及びグロスカレ
ンダー等が用いられる。In the present invention, the coating amount of the coating liquid containing a pigment as the main component is, on a dry weight basis, 10 g / m 2 or more on one side,
Preferably, 15 to 30 g / m 2 is suitable. As a coating method for the undercoat and topcoat, and a finishing method after drying, a super calender, a soft calender, a gloss calender and the like which are commonly used are used.
【００３８】[0038]
【作用】本発明において、原紙に少なくとも２層以上の
顔料と接着剤を主成分とする塗布層を有する印刷用顔料
塗被紙において、少なくとも塗布層の２層目以上をベン
トブレード塗工によって形成し、該ベントブレード塗工
によって形成される塗布層と隣接する下塗層のスムース
ター平滑度を２００〜５００ｍｍＨｇとし、さらには上
塗最上層の顔料として長径／短径＝５〜１０の範囲で、
且つ３２５メッシュ残査が０．１％以下である針状軽質
炭酸カルシウムを全顔料に対し１０〜４０重量％含有す
ることにより、安定した操業条件のもとで高品質な顔料
塗被紙を得ることができる。According to the present invention, in a pigment coated paper for printing having a coating layer containing at least two layers of pigment and an adhesive as main components in the base paper, at least the second layer of the coating layer is formed by vent blade coating. Then, the smoother smoothness of the undercoat layer adjacent to the coating layer formed by the vent blade coating is set to 200 to 500 mmHg, and as the pigment of the uppermost coating upper layer, the major axis / minor axis = 5 to 10,
Further, by containing 10 to 40% by weight of acicular light calcium carbonate having a 325 mesh residue of 0.1% or less with respect to all pigments, a high-quality pigment-coated paper is obtained under stable operating conditions. be able to.
【００３９】[0039]
【実施例】以下、本発明の効果を一層明瞭とするために
実施例を掲げる。なお、実施例中の部数は、全て重量部
を示し、特にことわりのない限り、濃度は固形分重量
％、塗布量は、乾燥後の塗布量を示す。EXAMPLES Examples will be given below in order to further clarify the effects of the present invention. In the examples, all parts are parts by weight. Unless otherwise specified, the concentration means the solid content% by weight, and the coating amount means the coating amount after drying.
【００４０】実施例１ 幅１００ｃｍ・坪量６０ｇ／ｍ2 の上質紙に、ゲートロ
ール塗布装置により、絶乾塗布量が８ｇ／ｍ2 となるよ
うに、以下の配合の固形分濃度が５４％の塗布液を、下
塗液として、塗布速度１０００ｍ／ｍｉｎで塗布し、下
塗り原紙の作製を行った。これに、線圧８０ｋｇ／ｃｍ
・ロール温度５０℃のソフトカレンダー処理を行い、ス
ムースター平滑度４００ｍｍＨｇの下塗紙を得た。Example 1 A high-quality paper having a width of 100 cm and a basis weight of 60 g / m 2 was coated with a gate roll coating device so that the absolute dry coating amount was 8 g / m 2, and the solid content concentration of the following formulation was 54%. This coating solution was applied as an undercoating solution at a coating speed of 1000 m / min to prepare an undercoating base paper. In addition, linear pressure of 80kg / cm
A soft calender treatment with a roll temperature of 50 ° C. was performed to obtain an undercoat paper with a smoother smoothness of 400 mmHg.
【００４１】 ＜下塗り液配合＞ 市販重質炭酸カルシウム（カービタル９０） ７０部 市販２級カオリン（カオブライト） ３０部 市販ポリアクリル酸系分散剤 ０．２部 市販燐酸エステル化澱粉 ９部 市販スチレン・ブタジエン・ラテックス ８部 水酸化ナトリウム ０．１部<Undercoating liquid formulation> Commercial heavy calcium carbonate (Carbital 90) 70 parts Commercial secondary kaolin (caobrite) 30 parts Commercial polyacrylic acid-based dispersant 0.2 parts Commercial phosphate esterified starch 9 parts Commercial styrene Butadiene latex 8 parts Sodium hydroxide 0.1 part
【００４２】次に、以下の配合で得られた固形分濃度が
６１％の上塗用塗布液を、前に得られた下塗紙に、厚み
０．５ｍｍ・幅９１ｍｍのブレード刃を有するベントブ
レードを用い、１０００ｍ／ｍｉｎの塗布速度で塗布量
が１５ｇ／ｍ2 になるように塗布、乾燥を行い、印刷用
顔料塗被紙の作製を行った。塗布液を作製し、次に２５
０メッシュのセリエを２回通過させ、３２５メッシュ残
査が０．０５％以下の上塗り塗布液得た。この塗布液
を、前に得られた下塗り紙に、厚み０．５ｍｍ・幅９１
ｍｍのブレード刃を有するベントブレードを用い、１０
００ｍ／ｍｉｎの塗布速度で塗布量が１５ｇ／ｍ2 にな
るように塗布、乾燥を行い、印刷用顔料塗被紙の作製を
行った。Next, the coating solution for topcoat having a solid content concentration of 61% obtained by the following composition was applied to the undercoat paper obtained above by a vent blade having a blade blade with a thickness of 0.5 mm and a width of 91 mm. The pigment-coated paper for printing was prepared by applying and drying at a coating speed of 1000 m / min so that the coating amount was 15 g / m 2 . Make a coating solution, then 25
After passing through 0 mesh serie twice, a 325 mesh residue gave an overcoating coating solution of 0.05% or less. This coating solution was applied to the undercoat paper obtained previously, with a thickness of 0.5 mm and a width of 91 mm.
Using a bent blade having a mm blade blade, 10
A pigment-coated paper for printing was prepared by coating and drying at a coating speed of 00 m / min so that the coating amount was 15 g / m 2 .
【００４３】 ＜上塗り液配合＞ 軽質炭酸カルシウム（長径／短径＝７、３２５メッシュ残査０．０５％以下） ３０部 市販２級カオリン（カオブライト） ７０部 市販ポリアクリル酸系分散剤 ０．２部 市販燐酸エステル化澱粉 ２部 スチレン・ブタジエン・ラテックス １６部<Formulation of Topcoat Liquid> Light calcium carbonate (major axis / minor axis = 7, 325 mesh residue 0.05% or less) 30 parts Commercial secondary kaolin (caobrite) 70 parts Commercial polyacrylic acid-based dispersant 0. 2 parts Commercially available phosphated starch 2 parts Styrene-butadiene latex 16 parts
【００４４】実施例２ 実施例１において、長径／短径＝５で３２５メッシュ残
査が０．０５％以下の軽質炭酸カルシウムとした以外は
実施例１と同一の方法で、印刷用顔料塗被紙の作製を行
った。Example 2 The same procedure as in Example 1 was carried out except that light calcium carbonate having a major axis / minor axis = 5 and a 325 mesh residue of 0.05% or less was used. Paper was prepared.
【００４５】実施例３ 実施例１において、長径／短径＝１０で３２５メッシュ
残査が０．０５％以下の軽質炭酸カルシウムとした以外
は実施例１と同一の方法で、印刷用顔料塗被紙の作製を
行った。Example 3 Pigment coating for printing was carried out in the same manner as in Example 1 except that light calcium carbonate having a major axis / minor axis = 10 and a 325 mesh residue of 0.05% or less was used. Paper was prepared.
【００４６】実施例４ 実施例１において、軽質炭酸カルシウムを１０部、市販
２級カオリンを９０部とした以外は実施例１と同一の方
法で、印刷用顔料塗被紙の作製を行った。Example 4 A pigment-coated paper for printing was prepared in the same manner as in Example 1 except that 10 parts of light calcium carbonate and 90 parts of commercially available secondary kaolin were used.
【００４７】実施例５ 実施例１において、軽質炭酸カルシウムを４０部、市販
２級カオリンを６０部とした以外は実施例１と同一の方
法で、印刷用顔料塗被紙の作製を行った。Example 5 A pigment-coated paper for printing was prepared in the same manner as in Example 1 except that 40 parts of light calcium carbonate and 60 parts of commercially available secondary kaolin were used.
【００４８】実施例６ 実施例１において、線圧５０ｋｇ／ｃｍ・ロール温度５
０℃のソフトカレンダー処理を行い、スムースター平滑
度４８０ｍｍＨｇの下塗り紙とした以外は実施例１と同
一の方法で、印刷用顔料塗被紙の作製を行った。Example 6 In Example 1, the linear pressure was 50 kg / cm and the roll temperature was 5
A pigment-coated paper for printing was prepared in the same manner as in Example 1 except that soft calendering treatment at 0 ° C. was performed to obtain an undercoat paper having a smoother smoothness of 480 mmHg.
【００４９】実施例７ 実施例１において、線圧１６０ｋｇ／ｃｍ・ロール温度
９０℃のソフトカレンダー処理を行い、スムースター平
滑度２１０ｍｍＨｇの下塗り紙とした以外は実施例１と
同一の方法で、印刷用顔料塗被紙の作製を行った。Example 7 Printing was carried out in the same manner as in Example 1 except that soft calendering was performed at a linear pressure of 160 kg / cm and a roll temperature of 90 ° C. to obtain an undercoat paper of smoother smoothness 210 mmHg. A pigment coated paper was prepared.
【００５０】実施例８ 実施例１において、長径／短径＝１０で３２５メッシュ
残査が０．０１％以下の軽質炭酸カルシウムとした以外
は実施例１と同一の方法で、印刷用顔料塗被紙の作製を
行った。Example 8 The same procedure as in Example 1 was carried out except that light calcium carbonate having a major axis / minor axis = 10 and a 325 mesh residue of 0.01% or less was used. Paper was prepared.
【００５１】比較例１ 実施例１において、長径／短径＝４で３２５メッシュ残
査が０．０５％以下の軽質炭酸カルシウムとした以外は
実施例１と同一の方法で、印刷用顔料塗被紙の作製を行
った。Comparative Example 1 The same procedure as in Example 1 was carried out except that light calcium carbonate having a major axis / minor axis = 4 and a 325 mesh residue of 0.05% or less was used. Paper was prepared.
【００５２】比較例２ 実施例１において、長径／短径＝１１で３２５メッシュ
残査が０．０５％以下の軽質炭酸カルシウムとした以外
は実施例１と同一の方法で、印刷用顔料塗被紙の作製を
行った。Comparative Example 2 The same procedure as in Example 1 was carried out except that light calcium carbonate having a major axis / minor axis = 11 and a 325 mesh residue of 0.05% or less was used. Paper was prepared.
【００５３】比較例３ 実施例１において、軽質炭酸カルシウムを７部、市販２
級カオリンを９３部とした以外は実施例１と同一の方法
で、印刷用顔料塗被紙の作製を行った。Comparative Example 3 In Example 1, 7 parts of light calcium carbonate, commercially available 2
A pigment-coated paper for printing was prepared in the same manner as in Example 1 except that 93 parts of high-grade kaolin was used.
【００５４】比較例４ 実施例１において、軽質炭酸カルシウムを４５部、市販
２級カオリンを５５部とした以外は実施例１と同一の方
法で、印刷用顔料塗被紙の作製を行った。Comparative Example 4 A pigment coated paper for printing was prepared in the same manner as in Example 1 except that 45 parts of light calcium carbonate and 55 parts of commercially available secondary kaolin were used.
【００５５】比較例５ 実施例１において、下塗り紙をソフトカレンダー処理を
行わない以外は実施例１と同一の方法で、印刷用顔料塗
被紙の作製を行った。この時、スムースター平滑度５５
０ｍｍＨｇであった。Comparative Example 5 A pigment coated paper for printing was prepared in the same manner as in Example 1 except that the undercoat paper was not subjected to the soft calendar treatment. At this time, smoother smoothness 55
It was 0 mmHg.
【００５６】比較例６ 実施例１において、線圧４０ｋｇ／ｃｍ・３ニップのマ
シンカレンダー処理を行い、スムースター平滑度１７０
ｍｍＨｇの下塗り紙とした以外は実施例１と同一の方法
で、印刷用顔料塗被紙の作製を行った。Comparative Example 6 In Example 1, a machine calendering treatment with a linear pressure of 40 kg / cm · 3 nip was performed to obtain a smoother smoothness of 170.
A pigment-coated paper for printing was prepared in the same manner as in Example 1 except that the undercoat paper of mmHg was used.
【００５７】比較例７ 実施例１において、長径／短径＝１１で３２５メッシュ
残査が０．１５％以下の軽質炭酸カルシウムとした以外
は実施例１と同一の方法で、印刷用顔料塗被紙の作製を
行った。Comparative Example 7 A pigment coating for printing was applied in the same manner as in Example 1 except that light calcium carbonate having a major axis / minor axis = 11 and a 325 mesh residue of 0.15% or less was used. Paper was prepared.
【００５８】比較例８ 実施例１において、長径／短径＝１１で３２５メッシュ
残査が０．２３％以下の軽質炭酸カルシウムとした以外
は実施例１と同一の方法で、印刷用顔料塗被紙の作製を
行った。Comparative Example 8 The same procedure as in Example 1 was carried out except that light calcium carbonate having a major axis / minor axis = 11 and a 325 mesh residue of 0.23% or less was used. Paper was prepared.
【００５９】塗布した試料は、線圧２２０ｋｇ／ｃｍ・
１２ニップ・ロール温度８０℃のスーパーカレンダー処
理を行った後に、評価を行った。これらの結果を表１に
示す。The applied sample had a linear pressure of 220 kg / cm.
Evaluation was performed after performing a super calendering treatment at a 12 nip roll temperature of 80 ° C. The results are shown in Table 1.
【００６０】[0060]
【表１】 [Table 1]
【００６１】＜顔料塗被紙の評価方法１＞ ［平滑度］塗布層の平滑度は、スムースター平滑度試験
機（東英電子工業株式会社製、形式ＳＭ−６Ａ）により
測定した。（単位：ｍｍＨｇ）<Evaluation Method 1 of Pigment Coated Paper> [Smoothness] The smoothness of the coating layer was measured by a smoother smoothness tester (manufactured by Toei Electronics Co., Ltd., model SM-6A). (Unit: mmHg)
【００６２】＜顔料塗被紙の評価方法２＞ ［白紙光沢］村上式光沢度計を用い、入射角７５゜−反
射角７５゜としてカレンダー処理後の試料の光沢度の測
定を行った。<Evaluation Method 2 of Pigment Coated Paper> [White Paper Gloss] The Murakami gloss meter was used to measure the glossiness of the sample after calendering with the incident angle of 75 ° -reflection angle of 75 °.
【００６３】＜顔料塗被紙の評価方法３＞ ［印刷光沢］ローランドオフセット印刷機にて印刷後、
一昼夜室温で放置し、サンプルのブラック・マゼンタ・
シアン及びイエローの４色重ね刷りベタ印刷部につい
て、村上式光沢度計を入射６０゜−反射６０゜として光
沢度の測定を行った。<Evaluation Method 3 of Pigment Coated Paper> [Print Gloss] After printing with a Roland offset printing machine,
Leave it at room temperature for a whole day and night, and sample black magenta
With respect to the solid printed portion of four-color cyan and yellow overprinting, the glossiness was measured with a Murakami gloss meter at an incident angle of 60 ° and a reflection angle of 60 °.
【００６４】＜顔料塗被紙の評価方法４＞ ［インク着肉ムラ］ローランドオフセット印刷機にて印
刷後、一昼夜室温で放置し、サンプルのブラック・マゼ
ンタ・シアン及びイエローの４色重ね刷りベタ印刷部に
ついて、黙視判定で５段階に判定する。段階３以上を許
容レベルとする。<Evaluation Method 4 for Pigment Coated Paper> [Ink unevenness] After printing with a Roland offset printing machine, the sample was left at room temperature for one day and night, and four samples of black, magenta, cyan and yellow were overprinted in solid printing. The division is judged in five stages according to the silent judgment. Levels 3 and above are acceptable levels.
【００６５】＜顔料塗被紙の評価方法５＞ ［塗布欠点］塗布欠点の検出は、支持体長さ２０００ｍ
に関して、塗布装置に設置した欠点検出装置により行
い、塗布長さに対する、欠点部分の長さの百分率で評価
した。欠点検出装置で、検出できる塗布欠点は、ストリ
ーク、スクラッチ、ピンホール等の未接触部分のある欠
点、不均一な塗布パターンと汚れ等の塗布過剰部であ
り、検出は、幅０．３ｍｍ以上のものであれば検出可能
である。<Evaluation Method 5 of Pigment Coated Paper> [Coating Defects] Coating defects can be detected by measuring a support length of 2000 m.
Regarding the above, the defect detection device installed in the coating device was used, and evaluation was made by the percentage of the length of the defect portion with respect to the coating length. Application defects that can be detected by the defect detection device are defects with non-contact parts such as streaks, scratches and pinholes, and uneven application patterns and excessive application parts such as stains. Anything can be detected.
【００６６】＜顔料塗被紙の評価方法６＞ ［総合評価］判定は総合評価として、◎・○は合格と
し、△・×は不合格とした。<Evaluation Method 6 of Pigment Coated Paper> [Comprehensive Evaluation] The overall evaluation is ⊚ and ∘, and Δ and × are unacceptable.
【００６７】[0067]
【発明の効果】表１で明かなように本発明により、イン
キ着肉が良好で、平滑性及び光沢性に優れ、塗布欠点の
発生しない印刷顔料塗被紙を得ることができる。As is apparent from Table 1, according to the present invention, it is possible to obtain a paper coated with a printing pigment, which has good ink inking, excellent smoothness and gloss, and has no coating defects.
Claims (1)
剤を主成分とする塗布層を有する印刷用顔料塗被紙にお
いて、少なくとも塗布層の２層目以上をベントブレード
塗工によって形成し、該ベントブレード塗工によって形
成される塗布層と隣接する下塗層のスムースター平滑度
を２００〜５００ｍｍＨｇとし、さらには上塗最上層の
顔料として長径／短径＝５〜１０の範囲で、且つ３２５
メッシュ残査が０．１％以下である針状軽質炭酸カルシ
ウムを全顔料に対し１０〜４０重量％含有することを特
徴とする印刷用顔料塗被紙の製造方法。1. A pigment coated paper for printing having a coating layer containing at least two layers of a pigment and an adhesive as a main component on a base paper, wherein at least the second layer of the coating layer is formed by vent blade coating, The smoother smoothness of the undercoat layer adjacent to the coating layer formed by the vent blade coating is set to 200 to 500 mmHg, and further the major axis / minor axis = 5 to 10 as the pigment of the uppermost layer of the overcoat, and 325
A method for producing a pigment-coated paper for printing, comprising acicular light calcium carbonate having a mesh residue of 0.1% or less in an amount of 10 to 40% by weight based on all pigments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1272994A JPH07216791A (en) | 1994-02-04 | 1994-02-04 | Method for producing pigment-coated paper for printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1272994A JPH07216791A (en) | 1994-02-04 | 1994-02-04 | Method for producing pigment-coated paper for printing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07216791A true JPH07216791A (en) | 1995-08-15 |
Family
ID=11813534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1272994A Pending JPH07216791A (en) | 1994-02-04 | 1994-02-04 | Method for producing pigment-coated paper for printing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07216791A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006152528A (en) * | 2004-10-26 | 2006-06-15 | Oji Paper Co Ltd | Pigment-coated paper |
| CN111996836A (en) * | 2020-09-09 | 2020-11-27 | 新郑市吉龙包装材料有限公司 | Special paper processing production line |
-
1994
- 1994-02-04 JP JP1272994A patent/JPH07216791A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006152528A (en) * | 2004-10-26 | 2006-06-15 | Oji Paper Co Ltd | Pigment-coated paper |
| CN111996836A (en) * | 2020-09-09 | 2020-11-27 | 新郑市吉龙包装材料有限公司 | Special paper processing production line |
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