JPH04100998A - Coated paper for rotary offset printing - Google Patents
Coated paper for rotary offset printingInfo
- Publication number
- JPH04100998A JPH04100998A JP21732790A JP21732790A JPH04100998A JP H04100998 A JPH04100998 A JP H04100998A JP 21732790 A JP21732790 A JP 21732790A JP 21732790 A JP21732790 A JP 21732790A JP H04100998 A JPH04100998 A JP H04100998A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- base paper
- paper
- coated
- printing
- 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.)
- Granted
Links
- 238000007645 offset printing Methods 0.000 title claims description 13
- 238000000576 coating method Methods 0.000 claims abstract description 150
- 239000011248 coating agent Substances 0.000 claims abstract description 133
- 238000000034 method Methods 0.000 claims abstract description 31
- 239000011247 coating layer Substances 0.000 claims abstract description 29
- 239000004816 latex Substances 0.000 claims abstract description 26
- 229920000126 latex Polymers 0.000 claims abstract description 26
- 238000007766 curtain coating Methods 0.000 claims abstract description 14
- 239000000049 pigment Substances 0.000 claims abstract description 12
- 229920001577 copolymer Polymers 0.000 claims abstract description 10
- 239000000853 adhesive Substances 0.000 claims abstract description 5
- 230000001070 adhesive effect Effects 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 59
- 230000035699 permeability Effects 0.000 claims description 20
- 238000007639 printing Methods 0.000 abstract description 28
- 239000010410 layer Substances 0.000 abstract description 10
- 239000002932 luster Substances 0.000 abstract 2
- 239000002987 primer (paints) Substances 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 22
- 239000000047 product Substances 0.000 description 17
- 238000001035 drying Methods 0.000 description 11
- 239000011230 binding agent Substances 0.000 description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229920002472 Starch Polymers 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
- 238000003490 calendering Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000004927 clay Substances 0.000 description 5
- 238000009472 formulation Methods 0.000 description 5
- 239000008107 starch Substances 0.000 description 5
- 235000019698 starch Nutrition 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000005995 Aluminium silicate Substances 0.000 description 3
- 238000007754 air knife coating Methods 0.000 description 3
- 235000012211 aluminium silicate Nutrition 0.000 description 3
- 230000008901 benefit Effects 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
- 239000002270 dispersing agent Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 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 3
- -1 lake Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 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
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004584 polyacrylic acid Substances 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000011115 styrene butadiene Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 238000012800 visualization Methods 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
- 229910021532 Calcite Inorganic materials 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
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 108010073771 Soybean Proteins Proteins 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000008116 calcium stearate 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
- 239000008199 coating composition Substances 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000012669 liquid formulation Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001254 oxidized starch Substances 0.000 description 1
- 235000013808 oxidized starch Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 1
- 235000019710 soybean protein Nutrition 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Abstract
Description
本発明は輪転オフセット印刷用塗工紙に関し特に印刷時
の耐ブリスター適性が良好で、しかも高い白紙光沢及び
印刷光沢を持ち、そして印刷適性に優れた輪転オフセッ
ト印刷用塗工紙に関するものである。The present invention relates to a coated paper for rotary offset printing, and particularly to a coated paper for rotary offset printing that has good blister resistance during printing, high white paper gloss and printing gloss, and excellent printability.
近年、印刷物の視覚化か印刷用塗工紙に益々強（望まれ
るようになってきた。
又、印刷においては、高速化か進みそれに耐え得る塗工
紙か必要になってきている。高速化の意味からは輪転オ
フセット印刷は優れた印刷方式であるか、枚葉オフセッ
ト印刷適性に加えて優れたウェット強度と耐ブリスター
適性を備えた、より高度な性能か要求される。
枚葉印刷と輪転印刷の相違点は、後者か印刷されたイン
キを瞬間的に乾燥させることが必要であり、この高温、
高速乾燥機中で耐ブリスター性の悪い紙は印刷用紙とし
て不適である。ブリスター現象は塗工紙の含有水分か高
温によって瞬間的に水蒸気になるため内部圧を生しるこ
とにより発生する。この対策としては■原紙の内部結合
強度を上げる、■コート層の多孔性、つまり透気度を向
上させること等が考えられるか、■はパルプの選択、叩
解、内添薬品等により対応する必要があり、■は塗工液
に用いるラテックスの選択、カチオン化剤の添加等が考
えられる。しかしいずれの対策もそれぞれ問題点を内在
している。特に塗工液ての対応は往々にして液性の悪化
を招き、操業性を損なう。
印刷物の視覚化の面から考えると不透明度に加えて、平
滑性及び高い光沢を有することか大切である。平滑性を
得るための手法は今までに知られたものかいくつかある
。例えば原紙への抄き込み填料を増すといったような配
合面からの対応や、原紙に下塗り塗工を施すことも効果
のある方法である。
しかし実際に塗工紙を製造する場合こうした対策を取ろ
うとすると、それに伴う欠点も同時に現われ、なかなか
目的とする塗工紙を現実のものとすることは難しい。
例えば下塗り塗工の塗工方式、液組成により、最終的に
得られる塗工紙の平滑性、光沢、印刷適性、耐ブリスタ
ー適性および塗工層強度は大きく異なる。
塗工紙の製造に広く用いられているプレート塗工方式は
、高速薄層塗布か可能であり良好な塗工面の平滑性が得
られるため、原紙の下塗りにもよく用いられている。こ
の塗工方式は前もって原紙上に過剰に与えられた塗工液
をブレード先端においてかなりの圧力を塗工面に与える
ことて塗工液を掻き落とすことで計量し、塗工面を平滑
化させることを特徴としている。そのため、塗工層か圧
縮されてしまい透気度の高い、嵩高な塗層構造を得るこ
とかなかなかできない。そのため耐ブリスター適性か犠
牲となってしまう。プレート塗工方式において、嵩高な
下塗り塗工層を得るために、通常塗工液中に顔料として
タルク、デラミネーテッドクレー等の偏平顔料、また添
加剤としてカチオン化剤等を配合することかよく行われ
る。しかしながらこれらの素材を用いることにより塗工
液の液性は悪化してしまう。特にブレード直下における
高ずり速度時の粘度、すなわちハイシェア粘度か高くな
ってしまい、そして塗工時にストリフやスクラッチ等も
発生しやすくなり、更には著しいブレードの摩耗が起こ
るため、操業性の点て大きな問題となってしまう。また
ブレード塗工方式は予め原紙上に過剰の塗工液を塗布し
ておき、その後プレート直下で塗工液を掻き落とすいわ
ゆる後計量方式であるため、塗工液にある程度の保水性
を持たせておかないと、塗液の原紙上へのアプリケート
からプレートに達するまでに塗工液中の水か原紙中に選
択吸収されてしまい、塗工液の粘度、濃度か上昇してし
まう。それゆえ、長い時間塗工を続けていると塗工液の
液性か経時的に変化してしまい、安定した製品が得られ
なくなる場合か生ずる。
一般的にゲートロールコータ−等のロール転写コーター
は原紙の下塗りに広く用いられている。
この塗工方式はメタリングロールにより予め計量された
塗工液を原紙に転写、塗工するいわゆる前計量方式であ
る。そのため、ブレード塗工方式のような液性面での問
題やストリーク、スクラッチ等の問題か生じないという
メリットがある。しかしながら塗工液転写時に塗工面に
ある程度の圧力かかかるため塗工液が原紙中に浸透し、
嵩高な塗層構造か得られず、また塗工液を転写したロー
ルと塗工された原紙か離れる際に塗工面が粗くなってし
まい、プレート塗工方式のような良好な平滑性を得るこ
とかできない。また、前計量により塗工量か制限され、
塗工速度も限られてしまうため高塗工量、高速塗工にも
向いていない。
下塗り塗工を行った原紙か、それかサイズプレス処理を
受けていない場合には特に、印刷時の表面強度を確保す
るため、−船釣に下塗り層のバインダーを多くする必要
かある。特にロール転写コーターの場合塗工量に制限か
あるため、その傾向か顕著である。このためバインダー
系を工夫しない限り、又たとえ多少の工夫をしたとして
も耐ブリスター性を確保することが難しい。
以上のような現状から耐ブリスター適性が良好で、白紙
光沢、印刷光沢、平滑性そして塗工層強度に優れた塗工
紙を安価に操業性よく実現すること、特に輪転オフセッ
ト印刷用塗工紙として得ることができないのが現状であ
り、その実現が塗工紙を製造する者にとって大きな課題
となっている。In recent years, coated paper for printing has become more and more desirable for visualization of printed matter.Also, as printing speeds have increased, coated paper that can withstand this has become necessary. In this sense, rotary offset printing is an excellent printing method, or requires higher performance, such as excellent wet strength and blister resistance in addition to suitability for sheet-fed offset printing.Sheet-fed printing and rotary printing The difference between printing is that the latter requires instant drying of the printed ink, and this high temperature,
Paper with poor blister resistance in high-speed dryers is unsuitable as printing paper. The blister phenomenon occurs when the moisture contained in coated paper instantaneously turns into water vapor due to high temperatures, creating internal pressure. Possible countermeasures include: ■ increasing the internal bonding strength of the base paper, ■ improving the porosity of the coating layer, i.e., the air permeability, etc., etc. (■) needs to be addressed by selecting the pulp, beating, internal chemicals, etc. (2) may include the selection of latex used in the coating solution, addition of a cationizing agent, etc. However, each measure has its own problems. In particular, dealing with coating fluids often leads to deterioration of fluid properties and impairs operability. When considering the visualization of printed matter, it is important to have smoothness and high gloss in addition to opacity. There are several known methods for achieving smoothness. For example, effective methods include increasing the amount of filler added to the base paper, or applying an undercoat to the base paper. However, when attempting to take such measures when actually manufacturing coated paper, the accompanying drawbacks also appear, making it difficult to realize the desired coated paper. For example, the smoothness, gloss, printability, blister resistance, and coating layer strength of the final coated paper vary greatly depending on the coating method and liquid composition of the undercoat. The plate coating method, which is widely used in the production of coated paper, allows for high-speed thin layer coating and provides good coated surface smoothness, so it is often used for undercoating base paper. This coating method measures the excessive amount of coating liquid applied to the base paper in advance by applying considerable pressure to the coated surface with the tip of the blade, scraping off the coating liquid, and smoothing the coated surface. It is a feature. As a result, the coating layer is compressed, making it difficult to obtain a bulky coating structure with high air permeability. As a result, blister resistance is compromised. In plate coating methods, in order to obtain a bulky undercoat layer, flat pigments such as talc and delaminated clay are usually added to the coating solution, as well as cationizing agents and the like as additives. It will be done. However, the use of these materials deteriorates the liquid properties of the coating liquid. In particular, the viscosity directly under the blade at high shear speeds, that is, high shear viscosity, becomes high, and striffs and scratches are more likely to occur during coating, and furthermore, significant blade wear occurs, which has a significant impact on operability. It becomes a problem. In addition, the blade coating method is a so-called post-metering method in which excess coating liquid is applied onto the base paper in advance, and then the coating liquid is scraped off directly below the plate, so the coating liquid has a certain degree of water retention. Otherwise, water in the coating solution will be selectively absorbed into the base paper from the time the coating solution is applied onto the base paper until it reaches the plate, increasing the viscosity and concentration of the coating solution. Therefore, if coating is continued for a long time, the properties of the coating solution may change over time, and a stable product may no longer be obtained. Generally, roll transfer coaters such as gate roll coaters are widely used for undercoating base paper. This coating method is a so-called pre-metering method in which a pre-measured coating liquid is transferred onto the base paper using a metering roll and applied. Therefore, it has the advantage that it does not cause problems with liquid properties, streaks, scratches, etc. as with the blade coating method. However, when the coating liquid is transferred, a certain amount of pressure is applied to the coated surface, so the coating liquid penetrates into the base paper.
It is not possible to obtain a bulky coating layer structure, and the coated surface becomes rough when the roll to which the coating liquid has been transferred and the coated base paper are separated, making it difficult to obtain good smoothness as with plate coating methods. I can't do it. In addition, the coating amount is limited by pre-measurement,
Since the coating speed is also limited, it is not suitable for high coating amounts and high speed coating. In order to ensure surface strength during printing, it is necessary to increase the amount of binder in the undercoat layer, especially if the base paper is prime coated or has not been subjected to size press treatment. This tendency is particularly noticeable in the case of roll transfer coaters, as there is a limit to the amount of coating applied. For this reason, it is difficult to ensure blister resistance unless the binder system is modified, and even if some modification is made. Given the current situation, it is necessary to realize coated paper with good blister resistance, excellent white paper gloss, printing gloss, smoothness, and coating layer strength at low cost and with good operability, especially coated paper for rotary offset printing. Currently, it is not possible to obtain such a coating, and its realization is a major challenge for coated paper manufacturers.
かかる現状に鑑み、本発明の目的は耐ブリスタ−適性が
良好で、優れた白紙光沢、印刷光沢および印刷適性を有
する輪転オフセット印刷用塗工紙を得ることである。In view of the current situation, an object of the present invention is to obtain a coated paper for rotary offset printing which has good blister resistance, excellent white paper gloss, printing gloss and printability.
本発明は少なくとも２層以上の顔料及び接着剤を主成分
とした塗工層を有し、そのうち原紙と接触する塗工層か
、ゲル含有量か１５〜７０重量％である共重合体ラテッ
クスを含む塗工液をカーテン塗工方式により塗抹したも
のであり、かつ下塗り後の塗工層の透気度が１００ｍｍ
Ｈｇ以上であることを特徴とする輪転オフセット印刷用
塗工紙である。
本発明においては、上記の如く、原紙と接触する塗工層
をカーテン塗工方式により塗抹することを特徴としてい
るか、顔料およびバインダーを主成分とする塗工液をコ
ーターヘッドに送液し、自由落下あるいは加圧により垂
直カーテン膜を形成して原紙上に塗工するカーテン塗工
方式によるものである。一般塗工紙の製造については、
すてに英国特許第１，２７９，８１７号にあるように、
従来よりごく一般的に行われている。しかしなからオフ
セット輪転用多層コート紙の製造において、下塗り層に
カーテン塗工方式を用いたものはいまた見当たらない。
本発明はカーテン塗工方式によりケル含有量か１５〜７
０重量％である共重合体ラテックスを含む塗工液を輪転
オフセット印刷用塗工原紙の下塗り塗工に適用し、その
塗工層の透気度を１００ｍｍＨｇ以上とする事により、
印刷適性に優れ、しかも耐・ブリスター適性の向上に多
大な効果を生ぜしめることを見出したものである。
本発明でいうゲル含有量か１５〜７０重量％である共重
合体ラテックスとは、特にはスチレン・ブタジェン系、
・アクリル系、スチレン・ブタジェン・アクリル系ラテ
ックスを指すものである。
ここでいうゲル含有量とは、室温乾燥にてラテックスフ
ィルムを作成し、そのフィルムを約２００〜８００倍の
ベンゼンに入れ、４８時間放置溶解し、濾紙（＃２）で
濾過後、濾液を７０℃で乾燥し、ラテックスフィルムの
ゾル量より換算し算出した値である。
ゲル含有量か特異な範囲のラテックスを使用する方法と
して、特開昭６２−１６２０９７号公報に示すような方
法（ゲル含有量５〜６０重量％）かある。しかしなから
使用するラテックスとして、そのゲル含有量か１５重量
％未満であると十分な接着強度を得る事かできない。一
方、ゲル量の上限は主に耐ブリスター適性の点から決ま
るか、それでも、７０重量％を越えると、耐ブリスター
効果が無くなるばかりでなく、その後のカレンダー処理
による平滑化効果も低下する。
尚かかる顔料の特定のゲル含有量を有するラテックスの
使用量は下塗り顔料塗工層の全顔料に対して、７重量％
から３０重量％が好ましく、７重量％以下では強度を保
つために他のバインダーを併用せざるを得ず、こうした
場合には耐ブリスター適性の効果が無く、３０重量％よ
り多くなっても耐ブリスター適性の効果が劣ってしまう
。
本発明で用いる塗工紙用顔料としては、カオリン、重質
および軽質炭酸カルシウム、クレー、サチンホワイト、
タルク、酸化チタン、水酸化アルミニウム、シリカ、酸
化亜鉛、活性白土、酸性白土、珪素土、レーキ、プラス
チックピグメント等か挙げられる。
本発明で下塗り層で併用される、あるいは上塗り層に用
いられるバインダーとしては、スチレン・ブタジェン系
、スチレン・アクリル系、酢ビ系・アクリル系、エチレ
ン・酢ビ系・ブタジェン・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及びポリビニル
アルコール、無水マレイン酸・スチレン共重合体、イソ
ブチン・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バインダー酸化澱粉
、エーテル化澱粉、エステル化澱粉、酵素変性澱粉やそ
れらをフラッシュト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バインダーなどの一般に
知られたバインダーが挙げられる。また必要に応じて、
分散剤、増粘剤、保水剤、消泡剤、耐水化剤、着色剤等
の通常用いられている各種助剤か適宜使用できる。
また、本発明において、下塗り塗工層の透気度が１００
ｍｍＨｇ以上であることを特徴としている。
一般的に耐ブリスター適性を持たせるためには塗工層の
多孔質化、つまり透気度を高くした方かよいといわれて
いることは前述した。しかしなから下塗り層の透気度を
高くすることは塗工層強度を充分満足する程バインター
を配合した場合にはプレート塗工方式では難しい。ブレ
ード塗工方式で塗工液を原紙上に塗工した場合の塗工紙
の一般的な透気度は、その塗工量にもよるか、両面塗工
て８ｇ／ｒｒｉ以上では６０ ｍｍＨｇＪ：Ｊ下である
。また比較的透気度か得られやすいエアナイフ塗工方式
では、エアナイフパターンのため充分な平滑性が得られ
ず、上塗り塗工後の印刷適性を損なう事となり、高速塗
工にも向いていないので、品質特性と併せて操業面でも
マイナス面がある。
本発明において特徴とされるカーテン塗工方式は、ブレ
ード塗工方式やエアナイフ塗工方式などと異なりコータ
ーヘッドに送液される塗工液のヘット先端の液出「コ（
以後、「リップ」という。）からの流出量という形で計
量され、塗工後にブレードやエアナイフ等のように計量
されることのない前計量方式であるため、計量時に加圧
による原紙中への塗工液の浸透か少なく、塗工液の掻き
落としによる塗工層表面の凹凸か生しない。そのため、
この塗工方式により塗工液を原紙上に塗工すると、嵩高
な塗層構造か得られ、透気度かブレード塗工方式に比べ
て高くなり、また塗工層か原紙表面を均一に被覆する。
更にブレード塗工した塗工紙とカーテン塗工した塗工紙
の透気度が同一である場合、平滑度は、カーテン塗工を
行った塗工紙の方が良好であるため、上塗りをした際で
も耐ブリスター適性を損なわすに上塗り塗工後の光沢、
平滑性、塗工層強度の優れた塗工紙か得られるものと考
えられる。また耐ブリスター適性は、一般的に塗工量の
増加に伴い悪くなるが、カーテン塗工方式ではその特徴
である塗工層の嵩高性および高い透気性により厚塗り塗
工時の耐ブリスター適性の悪化が抑えられ、高塗工量塗
布にも非常に有効である。
更にカーテン塗工方式はブレード塗工方式と同し程度の
高速塗工か可能であり、塗工液に高剪断応力かかからな
いため、塗工液の高濃度、高粘度化か可能となり、他の
塗工方式に比へ操業性の而でもかなりの優位性を持つ。
本発明において、顔料及び接着剤を主成分とした塗工液
を原紙に下塗り塗工するカーテン塗工方式による塗工液
の垂直カーテン膜の形成法は特に限定されるものではな
く、自由落下および加圧による方法をも含んでいる。
以下、添付図面に基き、本発明の実施態様について詳細
に説明する。
第１図は本発明の実施態様を示す輪転オフセット印刷用
塗工紙の下塗り塗工用の塗工装置の概略図である。
予め調製された顔料およびバインダーを主成分とする塗
工液１は塗工液貯蔵タンク２より定量ポンプ３によって
コーターヘッド４へ送られる。この際、塗工液の送液量
は最終製品の塗工量および塗工時のライ゛／速度と比例
関係にあるため、ニーターヘット４への塗工液の送液量
コントロールは精度よく行う必要かある。それ故に定量
ポンプ３としては可変流量型の無脈動定流量ポンプか適
当である。
コーターヘット４の内部はマニホールド５ａ、５ｂ、ス
リット６からなり、それぞれ高精度の仕上げか施されて
いる。供給された塗工液１はマニホールド５ａ内に満た
され、更にマニホールド５ｂに送られＩＪ力方向おける
圧力分布か均一化され、最終的にスリット６において塗
工液は中方向の圧力分布および流速分布が均一化されて
リップより流出し、垂直なカーテン膜７を形成する。更
に形成させた垂直カーテン膜７を安定した状態に保持す
るため、エツジガイド８ａ、８ｂが設けられている。塗
工液１により形成された垂直カーテン膜７は、連続走行
している原紙９と接触し、原紙９に塗工される。ここて
エツジガイド８ａ、８ｂはコーターヘッド４の巾を越え
ず、更に原紙９の巾を越えて設けられ、垂直カーテン膜
は原紙９の巾を越えて形成される。原紙９の巾を越えて
流下する塗工液１は、受液槽１０に回収され、塗工液貯
蔵タンク２に戻された後再び塗工される。垂直カーテン
膜７が原紙９の巾を越えて形成されているのは、垂直カ
ーテン膜７の両端部における塗膜の厚塗りを防止するた
めである。連続走行している原紙９と垂直カーテン膜７
との接触部（以後、「塗工部」という。）の両側には原
紙９に導かれてくる空気流を遮蔽し、カーテン周辺の空
気の回流などで垂直カーテン膜７か乱れることなく原紙
９に達するようにするため遮風板１１ａ、↑１ｂが設け
られている。また、原紙９の搬送方向は塗工部の直前で
ローラー１２により方向転換することにより、原紙９に
導かれてくる空気流の塗工部への影響を最小限にとどめ
るように構成されている。形成させた垂直カーテン膜７
を安定した状態で塗工するためには原紙９からリップま
での高さかある程度必要とされるか、本実施態様におい
てはその高さを制御することも可能であり、垂直カーテ
ン膜７の安定に適した高さは６０〜１８０ｍｍ。
好ましくは８０〜１５０ｍｍ、更に好ましくは９０〜１
２０ｍｍか適当である。原紙９が切断した時など塗工が
中断された場合も塗工液１は受液槽１゜に回収される。
本実施態様においては、塗工過程において塗工液か外部
より高剪断応力等の作用を受けず、また前計量方式であ
るため、原紙に水か選択吸収されて塗工液か高濃度化す
ることもないので、塗工液を循環再使用しても塗工液の
組成か経時的に変化することもないから、安定した下塗
り塗工原紙を製造することが可能であり、塗工速度の増
加においてもかかる効果を期待てきる。
また塗工液量は予め計量された後原紙上に塗工されるた
め、その量は必要最小限となり、ブレドやエアナイフ塗
工方式のように塗工液を過剰に供給することかなく、そ
の供給量は１／′２以下となる。塗工液を自由落下ある
いは加圧により垂直カーテン膜を形成して原紙上に塗工
するカーテン塗工方式において、塗工量は原紙９の走行
速度と塗工液１の単位時間あたりの供給量によって決定
されるか、理論的には最低供給液量は垂直カーテン膜を
安定に形成するこ七か可能である量であり、それは極め
て少ない量である。そして１０００〜１２００ ｍ／ｍ
ｉｎの塗工速度による塗工も可能であり、更にカーテン
塗工方式においては前述の通り嵩高な塗工層を得ること
か可能であるため、低塗工量塗布、すなわち塗工量を非
常に少なく抑えることが可能である。このことは同時に
乾燥負荷を減少せしめることをも可能としている。
本発明は以上の実施態様に限定されることなく、様々な
変形が可能であることは言うまでもない。
前述した実施態様において、形成した垂直カーテン膜の
巾は原紙９の巾より大としたが、これは塗工層両端部に
おける塗工量の増加を防止するためてあって、このよう
な塗工量増加か小であるが、もしくはあまり問題とされ
ない場合、または特公昭４９−１４１３０号公報等に開
示される方法その他塗工量増加防止方法を採用すること
により解消しうる場合には、垂直カーテン膜を原紙９の
巾に一致させるか、あるいはこれより多少小としても差
し支えない。
下塗り塗工後の原紙は乾燥工程を経て従来と同様の方法
で上塗り塗工か施される。上塗り塗工液を下塗り塗工後
の原紙に塗工する際の方法は特に限定されるものではな
く、各種プレートコータロール転写コーター、エアナイ
フコーター ハコ−ター、ロットプレートコーター、シ
ョートドウエルコーター、カーテンコーター、ダイコー
タ、等の通常の各種塗工装置を用いることが可能である
が、印刷適性なとの最終的な特性を考虜すると、特にプ
レートコーターか好ましい。
上塗り塗工は通常下塗り塗工後の原紙を乾燥工程を経た
後で行っているが、下塗り塗工後の原紙を乾燥工程なし
で前述の各種塗工装置を用いて直接上塗り塗工液を塗工
するいわゆるつｘ ットオンウェット塗工による塗工方
法の場合も包含される。
この方法によれば、各塗工ごとで乾燥工程を必要としな
いため、工程か簡素化されるし、塗工層を一度に乾燥さ
せるため、乾燥負荷を一層減少せしめることが可能とな
るという操業面における大きな利点を生ずる。
下塗りおよび上塗り塗工された原紙は従来と同様の方法
によって乾燥され、巻取られた後、カレンダー処理を経
て仕上げられる。カレンター処理をする際の装置は特に
限定されるものではなく、スーパーカレンター、クロス
カレンダー、ソフトカレンター等の各種カレンター装置
により処理される。The present invention has at least two or more coating layers mainly composed of pigment and adhesive, of which the coating layer in contact with the base paper has a copolymer latex with a gel content of 15 to 70% by weight. The coating liquid containing the base coat is applied using a curtain coating method, and the air permeability of the coating layer after undercoating is 100 mm.
This is a coated paper for rotary offset printing characterized by having a content of Hg or more. As described above, the present invention is characterized in that the coating layer that comes into contact with the base paper is coated by a curtain coating method, or the coating liquid containing pigment and binder as main components is sent to the coater head, and This is based on a curtain coating method in which a vertical curtain film is formed by dropping or applying pressure and is coated on the base paper. Regarding the production of general coated paper,
As stated in British Patent No. 1,279,817,
This has been done more commonly than ever before. However, in the production of multilayer coated paper for offset rotary printing, there is no paper that uses a curtain coating method for the undercoat layer. The present invention uses a curtain coating method to reduce the Kel content from 15 to 7.
By applying a coating liquid containing 0% by weight of copolymer latex to the undercoat of coating base paper for rotary offset printing, and making the air permeability of the coating layer 100 mmHg or more,
It has been discovered that it has excellent printability and has a great effect on improving blister resistance and blister resistance. In the present invention, the copolymer latex having a gel content of 15 to 70% by weight is particularly styrene-butadiene-based,
・It refers to acrylic, styrene, butadiene, and acrylic latex. The gel content here means that a latex film is prepared by drying at room temperature, the film is placed in approximately 200 to 800 times the strength of benzene, the film is left to dissolve for 48 hours, and after filtration with filter paper (#2), the filtrate is This is a value calculated from the amount of sol in the latex film after drying at ℃. As a method of using latex with a specific range of gel content, there is a method (gel content: 5 to 60% by weight) as shown in JP-A-62-162097. However, if the gel content of the latex used is less than 15% by weight, sufficient adhesive strength cannot be obtained. On the other hand, the upper limit of the gel amount is determined mainly from the viewpoint of anti-blister suitability, and even then, if it exceeds 70% by weight, not only the anti-blister effect is lost, but also the smoothing effect by subsequent calendering is reduced. The amount of latex with a specific gel content of the pigment used is 7% by weight based on the total pigment of the undercoat pigment coating layer.
30% by weight is preferable; if it is less than 7% by weight, other binders must be used in combination to maintain strength, and in such a case there is no effect on blister resistance, and even if it exceeds 30% by weight, the blister resistance will not improve. The effectiveness of aptitude will be reduced. Pigments for coated paper used in the present invention include kaolin, heavy and light calcium carbonate, clay, satin white,
Examples include talc, titanium oxide, aluminum hydroxide, silica, zinc oxide, activated clay, acid clay, silicon clay, lake, and plastic pigment. In the present invention, the binders used in combination with the undercoat layer or the topcoat layer include styrene/butadiene, styrene/acrylic, vinyl acetate/acrylic, ethylene/vinyl acetate, butadiene/methyl methacrylate, and vinegar. Bi・
Synthetic binders such as various copolymers such as butyl acrylate and polyvinyl alcohol, maleic anhydride/styrene copolymer, isobutyne/maleic anhydride copolymer, acrylic acid/methyl methacrylate copolymer, oxidized starch, etherified starch , esterified starch, enzyme-modified starch, and cold water-soluble starch obtained by flash-trying them.
Commonly known binders include natural binders such as casein and soybean protein. Also, if necessary,
Various commonly used auxiliary agents such as dispersants, thickeners, water retention agents, antifoaming agents, waterproofing agents, and colorants can be used as appropriate. Further, in the present invention, the air permeability of the undercoat layer is 100
It is characterized by being equal to or higher than mmHg. As mentioned above, it is generally said that in order to have blister resistance, it is better to make the coating layer porous, that is, to increase the air permeability. However, it is difficult to increase the air permeability of the undercoat layer using the plate coating method when binder is blended to the extent that the strength of the coating layer is sufficiently satisfied. The general air permeability of coated paper when a coating liquid is applied onto base paper using the blade coating method is 60 mmHgJ, depending on the amount of coating, or when coating on both sides at 8 g/rri or more: It is under J. In addition, the air knife coating method, which is relatively easy to obtain air permeability, cannot obtain sufficient smoothness due to the air knife pattern, impairing printability after topcoating, and is not suitable for high-speed coating. In addition to the quality characteristics, there are also negative aspects in terms of operation. The curtain coating method, which is a feature of the present invention, differs from the blade coating method and the air knife coating method, in that the coating solution is sent to the coater head through a liquid outlet at the tip of the head.
From now on, it will be called "lip". ), and because it is a pre-metering method that is not measured after coating as with a blade or air knife, there is less penetration of the coating liquid into the base paper due to pressure during measurement. , there is no unevenness on the surface of the coating layer due to scraping of the coating solution. Therefore,
When the coating liquid is applied to the base paper using this coating method, a bulky coating layer structure is obtained, the air permeability is higher than that of the blade coating method, and the coating layer or the surface of the base paper is uniformly coated. do. Furthermore, if the air permeability of blade-coated paper and curtain-coated paper are the same, the smoothness of curtain-coated paper is better; The gloss after the topcoat will deteriorate even when the blister resistance is affected.
It is thought that coated paper with excellent smoothness and coating layer strength can be obtained. In addition, blister resistance generally deteriorates as the amount of coating increases, but with curtain coating, the bulkiness and high air permeability of the coating layer, which are characteristics of the curtain coating method, improves blister resistance during thick coating. Deterioration is suppressed and it is very effective even in high coating weight applications. Furthermore, the curtain coating method enables high-speed coating comparable to that of the blade coating method, and does not apply high shear stress to the coating solution, making it possible to increase the concentration and viscosity of the coating solution. Compared to coating methods, it has considerable advantages in terms of operability. In the present invention, the method of forming a vertical curtain film of a coating liquid by a curtain coating method in which a coating liquid mainly composed of pigments and adhesives is applied as an undercoat to a base paper is not particularly limited. It also includes methods using pressure. Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings. FIG. 1 is a schematic diagram of a coating device for applying an undercoat to coated paper for rotary offset printing, showing an embodiment of the present invention. A coating liquid 1 whose main components are a pigment and a binder prepared in advance is sent from a coating liquid storage tank 2 to a coater head 4 by a metering pump 3. At this time, since the amount of the coating liquid sent is proportional to the amount of the final product coated and the rate/speed during coating, it is necessary to control the amount of the coating liquid sent to the niter head 4 with precision. There is. Therefore, as the metering pump 3, a variable flow type non-pulsating constant flow pump is suitable. The inside of the coater head 4 consists of manifolds 5a, 5b, and slits 6, each of which is finished with high precision. The supplied coating liquid 1 is filled in the manifold 5a, and further sent to the manifold 5b, where the pressure distribution in the IJ force direction is made uniform.Finally, in the slit 6, the coating liquid has a pressure distribution and a flow velocity distribution in the middle direction. is uniformized and flows out from the lip, forming a vertical curtain film 7. Furthermore, edge guides 8a and 8b are provided to maintain the formed vertical curtain film 7 in a stable state. The vertical curtain film 7 formed by the coating liquid 1 comes into contact with the continuously running base paper 9 and is coated on the base paper 9. Here, the edge guides 8a and 8b are provided so as not to exceed the width of the coater head 4 and further to extend beyond the width of the base paper 9, and the vertical curtain film is formed beyond the width of the base paper 9. The coating liquid 1 flowing down over the width of the base paper 9 is collected in a liquid receiving tank 10, returned to the coating liquid storage tank 2, and then coated again. The reason why the vertical curtain film 7 is formed to extend beyond the width of the base paper 9 is to prevent thick coating of the coating film at both ends of the vertical curtain film 7. Continuously running base paper 9 and vertical curtain film 7
The airflow guided to the base paper 9 is blocked on both sides of the contact area (hereinafter referred to as "coating area") with the base paper 9, so that the vertical curtain film 7 can be prevented from being disturbed by the circulation of air around the curtain. Wind shielding plates 11a and ↑1b are provided to ensure that the wind reaches . In addition, the conveyance direction of the base paper 9 is changed by a roller 12 just before the coating section, so that the influence of the air flow guided to the base paper 9 on the coating section is minimized. . Formed vertical curtain film 7
In order to coat the vertical curtain film 7 in a stable state, a certain height from the base paper 9 to the lip is required, but in this embodiment, it is also possible to control the height, and it is possible to The suitable height is 60-180mm. Preferably 80 to 150 mm, more preferably 90 to 1
20mm is appropriate. Even when coating is interrupted, such as when the base paper 9 is cut, the coating liquid 1 is collected in the liquid receiving tank 1°. In this embodiment, the coating liquid is not subjected to external effects such as high shear stress during the coating process, and since it is a pre-metering method, water is selectively absorbed into the base paper and the coating liquid becomes highly concentrated. Therefore, even if the coating solution is recycled and reused, the composition of the coating solution does not change over time, making it possible to produce stable base paper coated with an undercoat and reducing the coating speed. We can expect similar effects even if the number of people increases. In addition, since the amount of coating liquid is measured in advance and then coated on the base paper, the amount is the minimum necessary, and there is no need to supply excessive coating liquid as with blade or air knife coating methods. The supply amount will be 1/'2 or less. In the curtain coating method, in which a vertical curtain film is formed by free-falling or pressurizing the coating liquid and is coated on the base paper, the coating amount is determined by the running speed of the base paper 9 and the supply amount of the coating liquid 1 per unit time. In theory, the minimum amount of liquid to be supplied is the amount at which it is possible to stably form a vertical curtain film, and it is an extremely small amount. and 1000~1200 m/m
It is also possible to coat at a coating speed of 1.5 in., and in the curtain coating method, it is possible to obtain a bulky coating layer as described above, so it is possible to apply a low coating amount, that is, to reduce the It is possible to keep it low. This also makes it possible to reduce the drying load at the same time. It goes without saying that the present invention is not limited to the above-described embodiments, and can be modified in various ways. In the embodiment described above, the width of the vertical curtain film formed was larger than the width of the base paper 9, but this was to prevent an increase in the amount of coating at both ends of the coating layer. Vertical curtain The width of the membrane may be made to match the width of the base paper 9, or it may be made slightly smaller than this. After the base paper has been coated with an undercoat, it goes through a drying process and is then coated with a topcoat in the same manner as in the past. There are no particular limitations on the method for applying the topcoat coating solution to the base paper after the undercoat has been applied, and various plate coaters, roll transfer coaters, air knife coaters, coaters, lot plate coaters, short dwell coaters, and curtain coaters can be used. Although it is possible to use various conventional coating devices such as , die coater, etc., a plate coater is particularly preferable when considering the final property of printing suitability. Topcoating is usually done after the base paper has been coated with an undercoat and has gone through a drying process, but the base paper coated with the base coat can be directly coated with a topcoat coating liquid using the various coating devices mentioned above without the drying process. This also includes the case of a coating method using so-called wet-on-wet coating. This method simplifies the process because it does not require a drying process for each coating, and it dries the coating layers all at once, making it possible to further reduce the drying load. This results in significant advantages in terms of surface area. The base paper coated with the undercoat and topcoat is dried in the same manner as in the past, wound up, and then finished through calendering. The equipment used for the calender treatment is not particularly limited, and various calender devices such as a super calender, a cross calender, and a soft calender can be used.
以下で、実施例を用い、更に詳細に本発明の詳細な説明
するが、本発明はこれにより限定されるものではない。
なお、実施例中の諸態定値は次の方法によって得られた
ものである。
１）ゲル含有率 室温乾燥にてラテックスフィルムを作
成し、そのフィルムを約２００から８００倍のベンセン
に入れ、４８時間放置溶解し、濾紙（＃２）で濾過後、
濾液を７０℃で乾燥し、ラテクスフィルムのゾル量を求
め、この値より換算して算出した。（重量％表示）
２）透気度 スムースター透気度試験機（東英電子工業
株式会社製、型式５Ｍ−６Ａ）により測定した。 （単
位 ｍｍ）Ｉｇ）
３）平滑度 スムースター平滑度試験機（東英電子工業
株式会社製、型式５Ｍ−６Ａ）により測定した。（単位
： ｍｍＨｇ）
４）白紙光沢度：ＪＩＳＰ８１４２に従い、角度７５度
で測定した。（単位０％）
５）重色印刷光沢度 ローランドオフセット印刷機にて
印刷し、−昼夜室温にて放置し、サンプルのブラック、
マセンタ、シアン、イエローの４色重ね刷すベタ印刷部
について、６０度の角度で光沢を測定した。（単位 ％
）
６）塗層強度ドライ Ｒ１印刷機（明製作所）を用いて
ＩＰＩインキにより印刷し、印刷面のピッキングの程度
を目視判定した。５段階評価で５か最も良い水準。
７）塗層強度ウェット ＲＩ印刷機（明製作所）を用い
てロールで試験片上に水を付け、その直後にＩＰＩイン
キで印刷を行い、印刷面のピッキングの程度を目視判定
した。５段階評価で５が最も良い水準。
８）耐ブリスター性 試験片の両面に市販オフモト輪転
印刷用インキをＲ１印刷機にて印刷し、その試験片をア
ルミフォイルてつつみ、３００°Ｃのシリコンオイル中
に５秒間入れ、そのブリスターの出方を目視判定した。
５段階評価で５か最も良い水準である。
なお、以後の実施例において用いられる「部Ｊとは重量
部を意味するものである。
実施例１
−ＬＢＫＰ （濾水度３５０ｍ１ｃ＋ｆ） ： ３０
部−ＮＢＫＰ （濾水度４２０ｍ１ｃｓｌ） ： ７
０部以下の実施例、比較例に於いて特に断わらない限り
、上記のパルプ配合で調成される。
〈内添薬品〉
・軽質炭酸カルシウム 。１０部本（平均粒
径、１μ、カルサイト系）
＊原紙中天分量で表示。
・市販アルキルケテンダイマー系内添サイズ剤（ＡＫＤ
） ：Ｑ、０３部・市販カチオン化澱
粉 。 ０．２部・市販カチオン系ポリアクリ
ルアミド歩留り向上剤 ：Ｏ，Ｏ
３部以下の実施例、比較例に於いて、特に断わらない限
り、内添薬品は上記の配合で調成される。
上記の配合で４０ｇ／ｒｄの坪量（絶乾）の原紙を抄造
し、これに対してカーテンコーターで以下の配合の濃度
５８％の塗液を塗工速度１０００ｍ／ｍｉｎて片面当た
り４ ｇ／ｉの塗工量で両面塗工した。
・市販重質炭酸カルシウム
（ニスカロン１５００） ・５０部
・市販２級カオリン（ウルトラコート）・５０部・市販
ポリアクリル酸系分散剤 ・１２部・市販燐酸エス
テル化澱粉 ・ ８部・スチレン・ブタジェ
ン・ラテックス
（ゲル含有量、３０重量％） 、１２部・水酸
化ナトリウム ・０．１５部以下の実施例
、比較例に於いて、特に断わらない限り、下塗り塗液は
上記の配合で調製される。下塗り塗工量も通例、上記に
同じ。
上記の条件で下塗りした原紙に対して、下記の配合の濃
度６３％の塗液を塗工速度１０００ｍ／ｍｉｎで片面当
たり８ ｇ／ｒｒｒの塗工量て、プレートコーターで両
面塗工した。
〈上塗り塗液配合〉
・市販２級カオリン（ウルトラコート）・７０部・市販
湿式重質炭酸カルシウム
（カービタル９０）：３０部
・市販ポリアクリル酸系分散剤 ・０．１部・市販
燐酸エステル化澱粉 ・ ５部・スチレン・
ブタジェン・ラテックス
（ゲル含有量：５５重量％） １１部・ステア
リン酸カルシウム ：０．３部・水酸化ナトリ
ウム ：０．１５部・塗液固形分濃度
二６３％以下の実施例、比較例に於い
て、特に断わらない限り、上塗り塗液は上記の配合で調
製される。上塗り塗工量も通例、上記に同じ。
上記の条件で塗工された塗工紙を以下の条件で、塗工、
乾燥直後にスーパーカレンダー処理した。
〈スーパーカレンダー処理条件〉
・処理速度 ６００ ｍ、／ｍｉｎ
・線圧 ２００ ｋｇ／ｃｍ
・ホローロール温度。６５°Ｃ
実施例１の製品の特性は第１表にまとめたか、満足のい
く特性値が得られている。
実施例２
下塗り液に配合するラテックス・ケル含有率を２０重量
％としたほかは実施例１と同し原紙に、実施例１と同じ
塗工条件で塗工を施し、やはり実施例１と同じ条件で処
理を行った。
実施例２の製品の特性は第１表にまとめたが、特性値は
満足する水準に有る。
実施例３
上塗り液に配合するラテックス・ゲル量を７０重量％と
じたほかは実施例１と同じ原紙に、実施例１と同じ塗工
条件て塗工を施し、やはり実施例１と同じカレンダー条
件で処理を行った。
実施例３の製品の特性は第１表にまとめたか、特性値は
満足の水準にある。
実施例４
下塗り液に配合するラテックス・ゲル含有率を６５重量
％とし、上塗り液に配合するラテックスのゲル含有率を
３０重量％としたほかは実施例１と同じ原紙に、実施例
１と同じ塗工条件で塗工を施し、やはり実施例１と同し
カレンダー条件で処理を行った。
実施例４の製品の特性は第１表にまとめたが、特性値は
満足する水準にある。
実施例５
下塗り液の塗工量を２ｇ／ｉとしたほかは実施例１と同
じ塗工条件で塗工を施し実施例１と同しカレンダー条件
で処理を行った。
実施例５の製品の特性は第１表に示したが、実施例１と
比べ、平滑度および白紙、印刷光沢は低下するが、耐ブ
リスター適性は若干良好となり満足のいくレベルとなる
。
実施例６
下塗り液の塗工量を６ｇ／ｒｒｉとしたほかは実施例１
と同じ塗工条件で塗工を施し実施例１と同じカレンダー
条件で処理を行った。
実施例６の製品の特性は第１表に示したか、実施例１と
比へ、耐ブリスター適性は若干低下するものの比較例７
より良好で満足のいくレベルとなる。
実施例７
原紙坪量を６０ｇ／ｒｒｒ、下塗り液の塗工量を１０ｇ
１ｒｄ、上塗り液の濃度を５０％とし、エアナイフコー
ターにより塗工速度５００ ｍ／’ｍｉｎて塗工量２０
ｇｈｄとして塗工したほかは実施例１と同じ条件によ
り処理を行った。
実施例７の製品の特性は第１表に示したか、高塗工量で
あるにもかかわらす、耐ブリスター適性はそれほど低下
していない。同じ塗工量である比較例８より確実に耐ブ
リスター適性は良好である。
比較例１
下塗り液に配合するラテックス・ゲル含有率を７５重量
％とじたほかは実施例１−と同し原紙に、実施例１−と
同し塗工条件て塗工を施し、やはり実施例１と同しカレ
ンダー条件で処理を行った。
比較例１の製品特性は第１表にまとめたが、実施例１に
比へ、耐ブリスター適性が著しく低下し満足のいく特性
値か得られない。
比較例２
下塗り液に配合するラテックス・ゲル含有率を９０重量
％上し、上塗り液に配合するラテックスのゲル含有率を
３０重量％とじたほかは実施例１と同し原紙に、実施例
１と同じ塗工条件で塗工を施し、やはり実施例１と同し
カレンダー条件で処理を行った。
比較例２の製品特性は第１表にまとめたか、実施例１に
比へ、耐ブリスター適性か著しく低下し、満足のいく特
性値か得られない。
比較例３
下塗り液に配合するラテックス・ゲル含有率を１０重量
％とし、上塗り液に配合するラテックスのゲル含有率を
５５重量％としたほかは実施例１と同し原紙に、実施例
１き同じ塗工条件で塗工を施し、やはり実施例１と同じ
カレンダー条件で処理を行った。
比較例３の製品特性は第１表にまとめたか、実施例１に
比へ、耐ブリスター適性は同し程度であるが、ウェット
塗層強度か著しく低下し、満足のいく特性値か得られな
い。
比較例４
実施例１と同し製造条件で調製した原紙に、下塗りに塗
工速度８００ ｍ７′ｍｉｎでゲートロールコータ−を
用いたほかは実施例１と同じ塗工条件て塗工を施し、実
施例１と同一のカレンター条件で処理を行った。
比較例４の製品の特性は第１表にまとめたが、実施例１
に比べ、透気度か若干低くなり、耐ブリスター適性が低
下する。
比較例５
実施例］と同し製造条件で調製した原紙に、下塗りにブ
レードコーターを用いて実施例１と同じ塗工条件で塗工
を施し、実施例と同じカレンダー条件で処理を行った。
比較例５の製品の特性は第１表にまとめたか、実施例１
に比べ密度か高く、透気度が著しく低くなり、耐ブリス
ター適性か低下する。
比較例６
実施例５と同じ塗工条件で下塗りにブレードコーターを
用いて塗工し、実施例１と同じカレンダ条件で処理を行
った。
比較例６の製品の特性は第１表に示したか、実施例５と
比へ、平滑度および白紙、印刷光沢は良好であるか、透
気度および耐ブリスター適性は低下する。
比較例７
実施例６と同じ塗工条件で下塗りにプレートコーターを
用いて塗工し、実施例１と同じカレンダー条件で処理を
行った。
比較例７の製品の特性は第１表に示したが、実施例６と
比べ、透気度および耐ブリスター適性は著しく低下する
。
比較例８
下塗りにプレートコーターを用いた他は実施例７と同じ
塗工条件で塗工、処理を行った。
比較例８の製品の特性は第１表に示したが、実施例７と
比へ、透気度および耐ブリスター適性が著しく劣ってい
る。
（以下余白）The present invention will be explained in more detail below using Examples, but the present invention is not limited thereto. In addition, various fixed values in Examples were obtained by the following method. 1) Gel content Create a latex film by drying at room temperature, put the film in about 200 to 800 times benzene, leave to dissolve for 48 hours, filter with filter paper (#2),
The filtrate was dried at 70° C., the amount of sol in the latex film was determined, and the amount was calculated based on this value. (Displayed as weight %) 2) Air permeability Measured using a Smoothstar air permeability tester (manufactured by Toei Electronics Co., Ltd., model 5M-6A). (Unit: mm) Ig) 3) Smoothness Measured using a Smoothster smoothness tester (manufactured by Toei Electronics Co., Ltd., model 5M-6A). (Unit: mmHg) 4) White paper glossiness: Measured at an angle of 75 degrees according to JISP8142. (Unit: 0%) 5) Heavy color printing glossiness Printed with a Roland offset printing machine, left at room temperature day and night, sample black,
The gloss was measured at an angle of 60 degrees for a solid printed area in which four colors of macenta, cyan, and yellow were overprinted. (unit %
) 6) Coating layer strength dry Printing was performed using IPI ink using an R1 printing machine (Mei Seisakusho), and the degree of picking on the printed surface was visually determined. 5 on a 5-point scale, or the best level. 7) Wet Coating Layer Strength Water was applied to the test piece using a roll using an RI printing machine (Mei Seisakusho), and immediately after that, printing was performed with IPI ink, and the degree of picking on the printed surface was visually determined. On a five-point scale, 5 is the best level. 8) Blister resistance Print commercially available off-moto rotary printing ink on both sides of a test piece using an R1 printing machine, wrap the test piece in aluminum foil, and place it in silicone oil at 300°C for 5 seconds to prevent blisters from coming out. The direction was visually determined. On a five-point scale, 5 is the best level. Note that "part J" used in the following examples means parts by weight. Example 1 - LBKP (freeness 350 m1c+f): 30
Part-NBKP (Freeness 420ml/csl): 7
In Examples and Comparative Examples containing 0 parts or less, unless otherwise specified, the above-mentioned pulp compositions are used. <Internally added chemicals> - Light calcium carbonate. 10 copies (average particle size, 1μ, calcite type) *Displayed as atomic weight in base paper.・Commercially available alkyl ketene dimer internal sizing agent (AKD
): Q, 03 parts/Commercially available cationized starch. 0.2 parts/Commercially available cationic polyacrylamide retention improver: O, O
In Examples and Comparative Examples containing 3 parts or less, unless otherwise specified, internal chemicals are prepared in the above formulation. A base paper with a basis weight (absolutely dry) of 40 g/rd is made with the above formulation, and a coating liquid with the following formulation at a concentration of 58% is applied using a curtain coater at a coating speed of 1000 m/min at a coating rate of 4 g/rd per side. Both sides were coated with a coating amount of i.・Commercially available heavy calcium carbonate (Niscallon 1500) ・50 parts ・Commercially available secondary kaolin (Ultracoat) ・50 parts ・Commercially available polyacrylic acid dispersant ・12 parts ・Commercially available phosphoric acid esterified starch ・ 8 parts ・Styrene Butadiene Latex (gel content, 30% by weight), 12 parts, sodium hydroxide - 0.15 parts or less In the Examples and Comparative Examples, unless otherwise specified, the undercoat coating liquid is prepared with the above formulation. The amount of primer coat is usually the same as above. The base paper, which had been undercoated under the above conditions, was coated on both sides with a plate coater at a coating speed of 1000 m/min and a coating amount of 8 g/rrr per side with a coating solution having a concentration of 63% as described below. <Top coating liquid formulation> - Commercially available secondary kaolin (Ultra Coat) - 70 parts - Commercially available wet heavy calcium carbonate (Carbital 90): 30 parts - Commercially available polyacrylic acid dispersant - 0.1 part - Commercially available phosphoric acid esterification Starch, 5 parts, styrene,
Butadiene latex (gel content: 55% by weight) 11 parts Calcium stearate: 0.3 parts Sodium hydroxide: 0.15 parts Coating liquid solids concentration
In Examples and Comparative Examples where the coating composition is 263% or less, unless otherwise specified, the top coating liquid is prepared with the above formulation. The amount of topcoat is usually the same as above. The coated paper coated under the above conditions was coated under the following conditions.
Immediately after drying, it was subjected to supercalender treatment. <Super calender processing conditions> ・Processing speed 600 m/min ・Linear pressure 200 kg/cm ・Hollow roll temperature. 65°C The characteristics of the product of Example 1 are summarized in Table 1, and satisfactory characteristic values were obtained. Example 2 Same as Example 1 except that the latex Kel content added to the undercoat liquid was 20% by weight. Coating was applied to the base paper under the same coating conditions as Example 1, and the same as Example 1. The treatment was carried out under the following conditions. The characteristics of the product of Example 2 are summarized in Table 1, and the characteristic values are at a satisfactory level. Example 3 The same base paper as in Example 1 was coated with the same coating conditions as in Example 1, except that the amount of latex gel mixed in the top coating liquid was reduced to 70% by weight, and the same calendering conditions as in Example 1 were applied. Processed with. The characteristics of the product of Example 3 are summarized in Table 1, and the characteristic values are at a satisfactory level. Example 4 The same base paper as in Example 1 was used, except that the latex gel content in the undercoat liquid was 65% by weight, and the latex gel content in the topcoat liquid was 30% by weight. Coating was carried out under the same coating conditions as in Example 1, and treatment was also carried out under the same calendering conditions. The characteristics of the product of Example 4 are summarized in Table 1, and the characteristic values are at a satisfactory level. Example 5 Coating was carried out under the same coating conditions as in Example 1, except that the coating amount of the undercoat liquid was 2 g/i, and the treatment was carried out under the same calender conditions as in Example 1. The properties of the product of Example 5 are shown in Table 1. Compared to Example 1, the smoothness, white paper, and printing gloss are lower, but the blister resistance is slightly better and at a satisfactory level. Example 6 Example 1 except that the coating amount of the undercoat liquid was 6 g/rri
Coating was performed under the same coating conditions as in Example 1, and treatment was performed under the same calender conditions as in Example 1. The characteristics of the product of Example 6 are shown in Table 1, and compared to Example 1, Comparative Example 7 has slightly lower blister resistance.
This results in a better and more satisfactory level. Example 7 Base paper basis weight is 60g/rrr, coating amount of undercoat liquid is 10g
1rd, the concentration of the top coating liquid was 50%, the coating speed was 500 m/'min using an air knife coater, and the coating amount was 20%.
The treatment was carried out under the same conditions as in Example 1 except that it was coated as ghd. The properties of the product of Example 7 are shown in Table 1, and despite the high coating weight, the blister resistance was not significantly reduced. The blister resistance is certainly better than that of Comparative Example 8, which has the same coating amount. Comparative Example 1 The same as in Example 1 except that the latex gel content added to the undercoat liquid was reduced to 75% by weight. Coating was performed on the base paper under the same coating conditions as in Example 1. Processing was carried out under the same calendar conditions as in 1. The product characteristics of Comparative Example 1 are summarized in Table 1, but as compared to Example 1, the blister resistance was significantly lowered and satisfactory characteristic values could not be obtained. Comparative Example 2 Same as Example 1 except that the latex/gel content blended in the undercoat solution was increased by 90% by weight, and the gel content of the latex blended in the topcoat solution was reduced to 30% by weight, but Example 1 was applied to the base paper. Coating was carried out under the same coating conditions as in Example 1, and treatment was also carried out under the same calender conditions as in Example 1. The product characteristics of Comparative Example 2 are summarized in Table 1. Compared to Example 1, the blister resistance was significantly lowered, and satisfactory characteristic values could not be obtained. Comparative Example 3 Same as Example 1 except that the latex gel content in the undercoat liquid was 10% by weight and the latex gel content in the topcoat liquid was 55% by weight. Coating was carried out under the same coating conditions, and treatment was also carried out under the same calendering conditions as in Example 1. The product characteristics of Comparative Example 3 are summarized in Table 1. Compared to Example 1, the blister resistance is about the same, but the wet coating strength is significantly lower, and satisfactory characteristic values cannot be obtained. . Comparative Example 4 A base paper prepared under the same manufacturing conditions as in Example 1 was coated with the same coating conditions as in Example 1, except that a gate roll coater was used at a coating speed of 800 m7'min for the undercoat. The treatment was carried out under the same calendar conditions as in Example 1. The characteristics of the product of Comparative Example 4 are summarized in Table 1.
Compared to , the air permeability is slightly lower and the blister resistance is lower. Comparative Example 5 A base paper prepared under the same manufacturing conditions as in Example] was coated with an undercoat using a blade coater under the same coating conditions as in Example 1, and treated under the same calender conditions as in Example. The characteristics of the product of Comparative Example 5 are summarized in Table 1, or those of Example 1
The density is higher than that of 100%, the air permeability is significantly lower, and the blister resistance is lowered. Comparative Example 6 An undercoat was applied using a blade coater under the same coating conditions as in Example 5, and treatment was performed under the same calender conditions as in Example 1. The characteristics of the product of Comparative Example 6 are shown in Table 1. Compared to Example 5, the smoothness, white paper, and printing gloss are good, but the air permeability and blister resistance are poor. Comparative Example 7 An undercoat was applied using a plate coater under the same coating conditions as in Example 6, and treatment was performed under the same calender conditions as in Example 1. The characteristics of the product of Comparative Example 7 are shown in Table 1, and compared to Example 6, the air permeability and blister resistance are significantly lower. Comparative Example 8 Coating and treatment were performed under the same coating conditions as in Example 7, except that a plate coater was used for undercoating. The characteristics of the product of Comparative Example 8 are shown in Table 1, and compared to Example 7, the product is significantly inferior in air permeability and blister resistance. (Margin below)
本発明は上記の如く、嵩高て透気度および平滑性の高い
下塗り塗工層か得られる事により耐ブリスター適性か良
好で、しかも優れた白紙光沢、印刷光沢および印刷適性
を有する輪転オフセット印刷用塗工紙を得ることかでき
る。As described above, the present invention provides a bulky, highly air permeable, and smooth undercoat layer, which provides good blister resistance, as well as excellent white paper gloss, printing gloss, and printing suitability for rotary offset printing. Can you get coated paper?
第１図は本実施態様を示す塗工装置の概略図である。
４ コーターヘッド、
５ａ、５ｂ：マニホールド、
６ スリット、 ７・垂直カーテン膜、８、エ
ツジガイド、 ９：原紙、
１０ 受液槽、
１１ａ、ｌｌｂ：遮風板FIG. 1 is a schematic diagram of a coating apparatus showing this embodiment. 4 coater head, 5a, 5b: manifold, 6 slit, 7.vertical curtain film, 8, edge guide, 9: base paper, 10 liquid receiving tank, 11a, llb: wind shield plate
Claims (1)
工層を有し、そのうち原紙と接触する下塗り塗工層が、
ゲル含有量が１５〜７０重量％である共重合体ラテック
スを含む塗工液をカーテン塗工方式により塗抹したもの
であり、かつ下塗り後の塗工層の透気度が１００ｍｍＨ
ｇ以上であることを特徴とする輪転オフセット印刷用塗
工紙。It has at least two or more coating layers mainly composed of pigment and adhesive, among which the undercoat coating layer that comes into contact with the base paper,
A coating liquid containing a copolymer latex with a gel content of 15 to 70% by weight is applied by a curtain coating method, and the air permeability of the coating layer after undercoating is 100 mmH.
Coated paper for rotary offset printing, characterized in that it has a weight of at least g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21732790A JP2960127B2 (en) | 1990-08-17 | 1990-08-17 | Coated paper for rotary offset printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21732790A JP2960127B2 (en) | 1990-08-17 | 1990-08-17 | Coated paper for rotary offset printing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04100998A true JPH04100998A (en) | 1992-04-02 |
| JP2960127B2 JP2960127B2 (en) | 1999-10-06 |
Family
ID=16702443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21732790A Expired - Lifetime JP2960127B2 (en) | 1990-08-17 | 1990-08-17 | Coated paper for rotary offset printing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2960127B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002266292A (en) * | 2001-03-06 | 2002-09-18 | Ishikawajima Harima Heavy Ind Co Ltd | Method and apparatus for manufacturing multilayer coated paper |
| JP2002317397A (en) * | 2001-04-23 | 2002-10-31 | Mitsubishi Paper Mills Ltd | Coated paper for offset printing using environment- friendly ink and deinkable printed matter |
| WO2004035929A1 (en) * | 2002-10-15 | 2004-04-29 | Dow Global Technologies Inc. | Method of producing a multilayer coated substrate having improved barrier properties |
| EP1416088A3 (en) * | 2002-10-15 | 2004-05-12 | Dow Global Technologies Inc. | Process for making coated paper or paperboard |
| JP2006299430A (en) * | 2005-04-15 | 2006-11-02 | Voith Paper Patent Gmbh | Method for producing coated paper |
| US7364774B2 (en) | 2002-04-12 | 2008-04-29 | Dow Global Technologies Inc. | Method of producing a multilayer coated substrate having improved barrier properties |
| US7425246B2 (en) | 2001-04-14 | 2008-09-16 | Dow Global Technologies Inc. | Process for making multilayer coated paper or paperboard |
| US7473333B2 (en) | 2002-04-12 | 2009-01-06 | Dow Global Technologies Inc. | Process for making coated paper or paperboard |
-
1990
- 1990-08-17 JP JP21732790A patent/JP2960127B2/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002266292A (en) * | 2001-03-06 | 2002-09-18 | Ishikawajima Harima Heavy Ind Co Ltd | Method and apparatus for manufacturing multilayer coated paper |
| JP4706111B2 (en) * | 2001-03-06 | 2011-06-22 | 株式会社Ｉｈｉ | Multilayer coated paper manufacturing method and apparatus |
| US7425246B2 (en) | 2001-04-14 | 2008-09-16 | Dow Global Technologies Inc. | Process for making multilayer coated paper or paperboard |
| JP2002317397A (en) * | 2001-04-23 | 2002-10-31 | Mitsubishi Paper Mills Ltd | Coated paper for offset printing using environment- friendly ink and deinkable printed matter |
| US7364774B2 (en) | 2002-04-12 | 2008-04-29 | Dow Global Technologies Inc. | Method of producing a multilayer coated substrate having improved barrier properties |
| US7473333B2 (en) | 2002-04-12 | 2009-01-06 | Dow Global Technologies Inc. | Process for making coated paper or paperboard |
| WO2004035929A1 (en) * | 2002-10-15 | 2004-04-29 | Dow Global Technologies Inc. | Method of producing a multilayer coated substrate having improved barrier properties |
| EP1416087A1 (en) | 2002-10-15 | 2004-05-06 | Dow Global Technologies Inc. | Method of producing a multilayer coated substrate having improved barrier properties |
| EP1416088A3 (en) * | 2002-10-15 | 2004-05-12 | Dow Global Technologies Inc. | Process for making coated paper or paperboard |
| JP2004148307A (en) * | 2002-10-15 | 2004-05-27 | Dow Global Technologies Inc | Method of manufacturing multilayer coated support improved in barrier properties |
| JP2006299430A (en) * | 2005-04-15 | 2006-11-02 | Voith Paper Patent Gmbh | Method for producing coated paper |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2960127B2 (en) | 1999-10-06 |
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