JPH07189188A - Coating material for transfer roll coating and coated paper - Google Patents
Coating material for transfer roll coating and coated paperInfo
- Publication number
- JPH07189188A JPH07189188A JP27083794A JP27083794A JPH07189188A JP H07189188 A JPH07189188 A JP H07189188A JP 27083794 A JP27083794 A JP 27083794A JP 27083794 A JP27083794 A JP 27083794A JP H07189188 A JPH07189188 A JP H07189188A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- transfer roll
- viscosity
- coated paper
- coating material
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、新規な組成物を使用す
ることにより、高固形分濃度、低粘度を有し、また操業
時にはトランスファーロール塗工の長所、特にオンライ
ンにおける高速で安定した作業性を損なうことなく、塗
工することができるトランスファーロール塗工用塗料に
関し、さらに高塗布量を有し、ブレード塗工に匹敵する
優れた光沢性、平滑性および印刷性能を有する塗工紙に
関するものである。BACKGROUND OF THE INVENTION The present invention has a high solid content and a low viscosity by using a novel composition, and also has advantages of transfer roll coating during operation, especially at high speed and stable operation online. The present invention relates to a transfer roll coating material that can be applied without impairing the property, and to a coated paper having a high coating amount and having excellent gloss, smoothness and printing performance comparable to blade coating. It is a thing.
【０００２】[0002]
【従来の技術】トランスファーロール塗工に使用される
塗料は、他のコーティング用塗料と同じく、顔料と接着
剤を主成分とするものであり、高粘度であり、塗布量は
低塗布量であることを特徴としていた。顔料としては、
カオリン、クレー、軽質炭酸カルシウム、重質炭酸カル
シウム、酸化チタン、水酸化アルミニウム、サチンホワ
イト、硫酸バリウム、酸化マグネシウム、タルクやコロ
イダルシリカ等の無機顔料、あるいはプラスチックピグ
メントや白色尿素樹脂顔料等の有機顔料が用いられ、通
常二種以上が併用されている。接着剤としては、カゼイ
ン、酸化澱粉、リン酸エステル化澱粉、大豆蛋白、カル
ボキシメチルセルロース等の水溶性高分子と、ＳＢＲ
系、ＭＢＲ系、あるいはＭＳＢＲ系と称される合成ゴム
系ラテックスやアクリル系ラテックスであり、これらは
通常、顔料１００重量％に対して水溶性高分子１０〜５
０重量％、ラテックス系１０〜３０重量％が使用され、
通常は併用される。更に、必要に応じ消泡剤、分散剤、
耐水化剤、防腐剤、着色剤、離型剤等の助剤を添加し塗
料とするものであった。2. Description of the Related Art The paint used for transfer roll coating, like other paints for coating, contains pigments and adhesives as main components, has a high viscosity, and has a low coating amount. It was characterized by that. As a pigment,
Kaolin, clay, light calcium carbonate, heavy calcium carbonate, titanium oxide, aluminum hydroxide, satin white, inorganic pigments such as barium sulfate, magnesium oxide, talc and colloidal silica, or organic pigments such as plastic pigments and white urea resin pigments Is usually used in combination of two or more. Examples of adhesives include water-soluble polymers such as casein, oxidized starch, phosphoric acid esterified starch, soybean protein and carboxymethyl cellulose, and SBR.
Synthetic rubber latex or acrylic latex referred to as a system, an MBR system, or an MSBR system, and these are usually 10 to 5% of a water-soluble polymer with respect to 100% by weight of a pigment.
0 wt%, latex system 10-30 wt% is used,
Usually used together. Furthermore, if necessary, a defoaming agent, a dispersant,
A paint was prepared by adding auxiliary agents such as a water-proofing agent, a preservative, a coloring agent, and a release agent.
【０００３】こうして得られたトランスファーロール塗
工用塗料の固形分濃度は、４０〜５５重量％であり、顔
料と接着剤の比（バインダー比）は、顔料に対し接着剤
が３０〜５０重量％と、かなり接着剤の比率が高いもの
であった。また、接着剤は多くの場合、澱粉系接着剤と
ラテックスが併用され、澱粉系接着剤の使用割合は、顔
料に対し２０〜５０重量％と高いことが特徴である。澱
粉系接着剤の粘度は、固形分濃度３０重量％のとき、温
度５０℃、Ｂ型粘度計の No.４ローター、６０ｒｐｍで
測定したとき少なくとも３，０００ｃｐｓ、通常１０，
０００ｃｐｓ以上のものが使用されている。また、塗布
量は通常、片面当たり５ｇ／ｍ2 未満特に３ｇ／ｍ2 以
下の低塗布量を効率よく塗布することができるのが大き
な特徴である。The transfer roll coating composition thus obtained has a solid content of 40 to 55% by weight, and the ratio of the pigment to the adhesive (binder ratio) is 30 to 50% by weight of the adhesive to the pigment. And the ratio of the adhesive was quite high. In many cases, a starch-based adhesive and a latex are used together as an adhesive, and the ratio of the starch-based adhesive used is high at 20 to 50% by weight based on the pigment. The viscosity of the starch-based adhesive is such that when the solid content concentration is 30% by weight, the temperature is 50 ° C., the B type viscometer is No. 4 rotor, and the viscosity is at least 3,000 cps, usually 10,
000 cps or more is used. Further, the coating amount is usually less than 5 g / m 2 on one side, and particularly a low coating amount of 3 g / m 2 or less can be efficiently coated, which is a major feature.
【０００４】このように、トランスファーロール塗工
は、極めて軽量塗工ができるので、サイズ液の塗工に適
したものとして知られているが、更に、装置がコンパ
クトであるにも拘わらず、広幅のウェッブに対し、
オンマシンで、紙切れが少ない状態で、数日間の連
続運転が可能である上、簡単に両面塗工が可能であ
り、しかも製品の表裏差が少ない、という幾多の長所
を有するものである。しかし、その反面、塗工面感が
ブレード塗工に比べ劣る、塗料特性に制限がある、
ロールのメンテナンスが必要などの欠点があった。[0004] As described above, the transfer roll coating is known to be suitable for coating a size liquid because it can be applied in an extremely lightweight coating. Further, although the apparatus is compact, the transfer roll coating is wide. Against the web of
It has many advantages that it can be operated continuously on-machine for a few days with few paper breaks, it can be easily coated on both sides, and there is little difference between the front and back sides of the product. However, on the other hand, the coated surface feel is inferior to that of blade coating, and there are restrictions on the coating properties,
There were drawbacks such as the need for roll maintenance.
【０００５】トランスファーロール塗工による塗工面
は、特有の筋状の塗工パターンを有するもので、ブレー
ド塗工で得られるような均一、かつ平滑で光沢のある塗
工面を得ることはできない。この筋状パターンは、塗布
量を多くすることによって改善することができるが、そ
うすると今度は、梨地等のスプリットパターンが現れて
しまうため、トランスファーロール塗工した紙を印刷し
たとき、優れた印刷品質を得ることはできない。そのた
め、上記のように多くの長所を有するにも拘わらず、ト
ランスファーロール塗工は、高塗布量を必要としないサ
イズ液塗工や軽量塗工、あるいは印刷品質が問われない
低級塗工紙の製造に限って使用されてきた。The coated surface obtained by transfer roll coating has a peculiar streak-shaped coating pattern, and it is impossible to obtain a uniform, smooth and glossy coated surface as obtained by blade coating. This streak pattern can be improved by increasing the coating amount, but this time, a split pattern such as satin will appear, so when printing transfer roll coated paper, excellent print quality will be obtained. Can't get Therefore, despite having many advantages as described above, transfer roll coating is suitable for size liquid coating or lightweight coating that does not require a high coating amount, or for low-grade coated paper that does not require printing quality. It has only been used in manufacturing.
【０００６】[0006]
【発明が解決しようとする課題】近年、塗工紙全般に高
級化志向が強まり、例えばアート紙においてはより高光
沢で印刷品質に優れた、いわゆるスーパーアート紙が出
現し、汎用グレードである超軽量塗工紙においても更に
高い不透明度、剛度、光沢度が求められている。この傾
向は低級塗工紙においても同様である。従来より、塗工
紙の平滑度や光沢度の向上にはスーパーカレンダーやマ
シンカレンダーが用いられ、より光沢の高い塗工紙を得
るためにカレンダー圧や温度アップの手段がとられてい
る。しかしながらこれらの手段をトランスファーロール
塗工紙に適用すると、若干光沢は向上するものの、反
面、紙の嵩高さが失われ、塗工紙の不透明性、白色度、
剛度、インキ受理性等の品質が低下し何等解決にはなら
ない。In recent years, there has been an increasing tendency toward higher grades in coated papers in general, and for example, in art papers, so-called super art papers with higher gloss and excellent print quality have emerged, which is a general-purpose grade. Even in lightweight coated paper, higher opacity, rigidity and gloss are required. This tendency also applies to low-grade coated paper. Conventionally, a super calender or a machine calender has been used to improve the smoothness and glossiness of coated paper, and calender pressure and temperature increase means have been used to obtain a coated paper with higher gloss. However, when these means are applied to transfer roll coated paper, the gloss is slightly improved, but on the other hand, the bulkiness of the paper is lost, and the opacity and whiteness of the coated paper,
The quality, such as rigidity and ink acceptability, deteriorates and there is no solution.
【０００７】そこで本発明は、トランスファーロール塗
工の長所、特にオンマシンでの高速で安定した作業性を
損なうことなく、塗工むらのない均一な塗工面が得られ
るとともに、低カレンダー条件で高い光沢と平滑な塗工
面が得られるトランスファーロール塗工用塗料と、この
塗料を塗工して、ブレード塗工法に匹敵する優れた印刷
品質が得られる塗工紙を安定して供給することを課題と
した。The present invention, therefore, has advantages of transfer roll coating, in particular, a uniform coating surface without coating unevenness can be obtained without impairing high-speed and stable workability in on-machine, and high under low calender conditions. The challenge is to stably supply a coating material for transfer roll coating that provides a glossy and smooth coating surface and a coating paper that is coated with this coating material and that has excellent print quality comparable to the blade coating method. And
【０００８】[0008]
【課題を解決するための手段】一般に、塗工紙におい
て、塗工層の塗布量が多くなると平滑な面が得られる
が、トランスファーロール塗工における塗布量の調節
は、ロール間のニップ圧、各ロールの周速および塗料の
固形分濃度の調節によって行なわれる。Generally, in coated paper, a smooth surface can be obtained when the coating amount of the coating layer is large, but the coating amount in transfer roll coating is controlled by the nip pressure between rolls, It is carried out by adjusting the peripheral speed of each roll and the solid content of the paint.
【０００９】そこで、塗布量を多くすることが上記課題
の解決に結びつくと考え、ロール間ニップ圧や周速およ
び塗料の固形分濃度について検討した。ニップ圧を小さ
くしてロールの間隙を大きくすると、塗布量は増大する
もののリング状のパターンを生じ易く、周速差をつける
と塗工面感が悪くなるので、実際上ニップ圧や周速差で
はほんの少しの塗布量調整しかできないことがわかっ
た。従って塗布量の調整は主として塗料の固形分濃度の
函数となり、高塗布量塗布するには、塗料の固形分濃度
を高くしなければならない。しかしながら、従来のトラ
ンスファーロール塗工用塗料に使用されている材料の範
囲で固形分濃度を上げると、粘度が上昇し、アプリケー
ターロールに塗料のスプリットパターンが生じ、塗工面
にそのパターンが現れて塗工面感が損なわれるだけでな
く、塗料のボイリング、ガムアップ、塗料ミストの飛散
などが発生し、トランスファーロール塗工の大きな利点
であるオンマシンでの広幅、高速かつ安定した操業がで
きなくなってしまう。Therefore, it was considered that increasing the coating amount would lead to the solution of the above problems, and the nip pressure between rolls, the peripheral speed and the solid content concentration of the coating were examined. If the nip pressure is decreased and the roll gap is increased, the coating amount increases, but a ring-shaped pattern is likely to occur, and if the peripheral speed difference is given, the coated surface feel deteriorates. It turns out that only a small amount of coating weight adjustment is possible. Therefore, the adjustment of the coating amount is mainly a function of the solid content concentration of the coating material, and in order to apply a high coating amount, the solid content concentration of the coating material must be increased. However, if the solid content concentration is increased within the range of the materials used for conventional transfer roll coating materials, the viscosity will increase and a split pattern of the coating material will appear on the applicator roll, and this pattern will appear on the coated surface. Not only does it impair the feel of the work surface, but it also causes paint boiling, gum up, and paint mist scattering, which makes it impossible to perform wide, high-speed, and stable operations on-machine, which is a major advantage of transfer roll coating. .
【００１０】そこで、更に研究を重ねた結果、固形分濃
度が５８重量％以上であって、その固形分濃度の塗料の
粘度が、Ｂ型粘度計の No.４ローターを用いて６０ｒｐ
ｍで測定して１，５００ｃｐｓ以下であれば、トランス
ファーロール塗工の長所、特にオンマシンでの高速で安
定した作業性を損なうことなく、塗工むらのない均一な
塗工ができ、低カレンダー条件にて高い光沢と平滑な塗
工面が得られ、ブレード塗工法に匹敵する優れた印刷品
質の塗工紙が得られることを見出し、本発明を完成し
た。Then, as a result of further research, the solid content concentration was 58% by weight or more, and the viscosity of the coating material having the solid content concentration was 60 rp using a No. 4 rotor of B type viscometer.
If it is 1,500 cps or less as measured by m, the advantages of transfer roll coating, especially high speed and stable workability on machine, without sacrificing uniform coating can be achieved and low calender. The inventors have found that under the conditions, high gloss and a smooth coated surface can be obtained, and a coated paper having an excellent printing quality comparable to the blade coating method can be obtained, and the present invention has been completed.
【００１１】固形分濃度が５８重量％以上であって、Ｂ
型粘度計の No.４ローターを用いて６０ｒｐｍで測定し
た粘度（以下塗料の粘度は常にこの条件で測定した時の
粘度を示す）が１，５００ｃｐｓ以下の塗料は、低粘度
の接着剤の使用によって得ることができ、また、アスペ
クト比の小さい顔料を使用することによって、粘度と共
に塗布面の面感の良い塗布紙が得られることを見出し
た。When the solid content concentration is 58% by weight or more, B
Use a low-viscosity adhesive for paints with a viscosity of 1,500 cps or less measured at 60 rpm using a No. 4 rotor of a type viscometer (hereinafter the viscosity of the paint always indicates the viscosity when measured under these conditions). It has been found that by using a pigment having a small aspect ratio, it is possible to obtain a coated paper having a good viscosity and a good surface feeling.
【００１２】本発明で使用することができる接着剤は、
顔料と混合したとき粘度を上昇させることなく濃度を高
くすることができる水溶性接着剤であって、十分な顔料
の接着強度を現すものである必要がある。塗料の諸性
質、およびトランスファーロール塗工したときの塗工面
の諸性質を検討した結果、接着剤固形分濃度３０重量％
のときの粘度が３，０００ｃｐｓ（Ｂ型粘度計、６０ｒ
ｐｍ，５０℃：以下澱粉系接着剤の粘度はこのこの条件
で測定したものである）未満の、澱粉系接着剤を使用す
ることが本発明にとって極めて好ましいものであること
を見出した。従来使用されていた澱粉系接着剤の、固形
分濃度３０重量％での粘度は、少なくとも３，０００ｃ
ｐｓであり、多くの場合１０，０００ｃｐｓ以上である
のに比べ、極めて低粘度のものである。このような低粘
度澱粉系接着剤としては、エチルエーテル化澱粉、ヒド
ロキシエチルエーテル化澱粉、低粘度化酸化澱粉等の変
性澱粉、あるいは澱粉ラテックス共重合体等の変性澱粉
系接着剤である。また、塗工面の強度や印刷光沢度など
の点から、この低粘度澱粉系接着剤単独で使用するよ
り、他の接着剤、特に比較的低粘度で接着力の大きいラ
テックス系接着剤を併用することが好ましい。接着剤の
使用量は、使用する接着剤の種類や顔料の種類などによ
って、また、求められる塗工紙の要求品質によって変化
するので、一定のものとして限定されるものではなく、
要は、できあがった塗料の固形分濃度が５８重量％での
粘度が、１，５００ｃｐｓ以下となればよい。一般的に
は、ラテックスと併用する場合は低粘度変性澱粉を顔料
に対し１〜１５重量％程度使用するのが好ましく、３〜
９重量％でも必要な塗料物性と、塗工紙の品質を得るこ
とができる。澱粉ラテックス共重合体の場合は単独で使
用することができるので、顔料に対し２０〜５０重量％
程度使用するのが適当である。The adhesive that can be used in the present invention is
A water-soluble adhesive capable of increasing the concentration without increasing the viscosity when mixed with a pigment, and needs to exhibit sufficient adhesive strength of the pigment. As a result of examining various properties of the paint and various properties of the coated surface after transfer roll coating, the adhesive solid content concentration was 30% by weight.
Viscosity at 3,000 cps (B type viscometer, 60r
It was found that it is extremely preferable for the present invention to use a starch-based adhesive having a viscosity of less than pm, 50 ° C .: the viscosity of the starch-based adhesive is measured under these conditions). The viscosity of the conventionally used starch-based adhesive at a solid concentration of 30% by weight is at least 3,000c.
ps, which is extremely low in viscosity, as compared with 10,000 cps in many cases. Such low-viscosity starch-based adhesives are modified starch-based adhesives such as ethyl etherified starch, hydroxyethyl etherified starch, and low-viscosity oxidized starch, or modified starch-based adhesives such as starch latex copolymer. In addition, from the viewpoint of the strength of the coated surface and the printing glossiness, other adhesives, especially latex adhesives with a relatively low viscosity and high adhesive strength, are used together, rather than using this low-viscosity starch adhesive alone. It is preferable. The amount of the adhesive used varies depending on the type of adhesive used, the type of pigment, etc., and the required quality of the coated paper, so it is not limited to a fixed amount.
The point is that the viscosity of the resulting paint at a solid content concentration of 58% by weight should be 1,500 cps or less. Generally, when used in combination with latex, low viscosity modified starch is preferably used in an amount of about 1 to 15% by weight based on the pigment.
Even with 9% by weight, the required paint properties and the quality of coated paper can be obtained. In the case of a starch latex copolymer, it can be used alone, so 20 to 50% by weight based on the pigment
It is appropriate to use it to some extent.
【００１３】本発明で使用することができる顔料は、ア
スペクト比が小さいものであれば特に限定するものでは
なく、従来トランスファーロール塗工用に使用されてい
た顔料の中から選択し、また塗工面の要求品質にあわせ
て何種類かの顔料を併用することができる。アスペクト
比が大きくなると表面被覆性は良くなるが、塗料の流動
性が悪くなり、トランスファーロール塗工時に、アプリ
ケーターロールに梨地などのスプリットパターンが生
じ、均一で平滑な塗工面を得ることが難しくなる傾向が
あるので、あまり大きなアルペクト比の顔料の使用は好
ましいものではない。平均粒径が大きければ、塗料粘度
は小さくなるが、塗工面の均一性や平滑性が損なわれ
る。平均粒径があまり小さくなると、塗料粘度が増大し
トランスファーロール塗工時にアプリケーターロールに
梨地などのスプリットパターンが生じ、やはり、均一で
平滑な塗工面を得ることができないことがあるので、適
当なアスペクト比と平均粒径の顔料を選択する必要があ
る。この点で、塗工用顔料として賞用されているカオリ
ナイトクレーやタルクは、平均アスペクト比がおよそ２
０、あるいは３０と大きく、単独で使用することはでき
ない。アスペクト比が小さいほど小さな粒径の顔料を使
用しても均一でむらのない、印刷品質がよい塗工紙を得
ることができる。The pigment that can be used in the present invention is not particularly limited as long as it has a small aspect ratio, and it is selected from the pigments conventionally used for transfer roll coating, and the coating surface It is possible to use several kinds of pigments together depending on the required quality. When the aspect ratio is large, the surface coverage is good, but the fluidity of the paint is poor, and when applying the transfer roll, a split pattern such as satin is generated on the applicator roll, making it difficult to obtain a uniform and smooth coating surface. The use of pigments with too high arpect ratio is not preferred because of the tendency. If the average particle size is large, the viscosity of the coating material will be small, but the uniformity and smoothness of the coated surface will be impaired. If the average particle size is too small, the viscosity of the coating increases and a split pattern such as a satin finish occurs on the applicator roll during coating of the transfer roll, and it may not be possible to obtain a uniform and smooth coating surface. It is necessary to select a pigment with a ratio and an average particle size. In this respect, kaolinite clay and talc, which are prized as coating pigments, have an average aspect ratio of about 2
It is as large as 0 or 30 and cannot be used alone. The smaller the aspect ratio, the more uniform the coated paper can be obtained even if a pigment having a smaller particle size is used, and the printing quality is good.
【００１４】本発明で使用するのに適した顔料として
は、重質炭酸カルシウム、軽質炭酸カルシウム、亜硫酸
カルシウム、パイロフィライト、プラスチックピグメン
ト等の、アスペクト比が１０以下であって、平均粒径
０．１〜５μｍ程度のものである。これらの中から、平
均アスペクト比が５以下、より好ましくは３以下の、平
均粒径０．５〜２μｍ程度の炭酸カルシウムを使用する
のが好ましい。この炭酸カルシウムと併用することがで
きる他の顔料もアスペクト比が小さいほど好ましく、こ
の点で有機顔料との併用は好ましいものである。また、
塗工面の光沢や不透明性の要求が高い場合には、トラン
スファーロール塗工の特性を損なわない範囲で、例えば
カオリン等の比較的アスペクト比の大きな顔料を併用す
ることができる。このような場合でも、顔料全体として
のアスペクトを１０以下にすることが好ましい。顔料を
併用する場合、上記炭酸カルシウムは全顔料の３０重量
％以上使用することが好ましく、より好ましくは４０重
量％以上の使用である。Pigments suitable for use in the present invention include heavy calcium carbonate, light calcium carbonate, calcium sulfite, pyrophyllite, and plastic pigments having an aspect ratio of 10 or less and an average particle size of 0. .About.1 to 5 μm. Of these, it is preferable to use calcium carbonate having an average aspect ratio of 5 or less, more preferably 3 or less and an average particle size of about 0.5 to 2 μm. Other pigments that can be used in combination with this calcium carbonate are also preferable as the aspect ratio is smaller, and in this respect, combination with an organic pigment is preferable. Also,
When the gloss and opacity of the coated surface are highly required, a pigment having a relatively large aspect ratio, such as kaolin, can be used together within a range that does not impair the characteristics of transfer roll coating. Even in such a case, it is preferable that the aspect of the pigment as a whole is 10 or less. When a pigment is used in combination, the above calcium carbonate is preferably used in an amount of 30% by weight or more, more preferably 40% by weight or more, based on all pigments.
【００１５】これら顔料と接着剤を混合し、必要に応じ
て耐水化剤、消泡剤、分散剤、防腐剤、着色剤、離型剤
等の助剤を０．１〜２重量％程度添加して最終塗料が得
られる。このようにして得られた塗料は、塗料濃度を５
８重量％以上と高くしても、粘度が１，５００ｃｐｓ以
下となり、トランスファーロール塗工に適した塗料とな
る。These pigments are mixed with an adhesive, and if necessary, auxiliary agents such as a water-proofing agent, a defoaming agent, a dispersant, a preservative, a coloring agent and a release agent are added in an amount of about 0.1 to 2% by weight. The final paint is obtained. The paint thus obtained has a paint concentration of 5
Even if it is as high as 8% by weight or more, the viscosity becomes 1,500 cps or less, and the coating material is suitable for transfer roll coating.
【００１６】本発明でいうトランスファーロール塗工と
は、塗料供給手段によって供給された塗料を、メータリ
ング手段要すればスムージング手段を経てアプリケータ
ーロールに転移し、このロール上の塗料を、支持体に対
し正回転で転写することを特徴とする塗工方式である。
塗料供給手段、メータリング手段、スムージング手段
は、基本的にはアプリケーターロールに対し複数の正回
転のロールで構成される。しかし、より高度なメータリ
ングやスムージングを目的とする場合、逆回転のロール
やロッド、あるいはブレードやエアを逆方向に取り付け
ることもある。本発明はこれらいずれのものにも支障な
く適用することができる。The transfer roll coating referred to in the present invention means that the coating material supplied by the coating material supplying means is transferred to an applicator roll through metering means, if necessary, smoothing means, and the coating material on this roll is applied to a support. On the other hand, it is a coating method characterized in that transfer is performed by forward rotation.
The paint supply means, the metering means, and the smoothing means are basically composed of a plurality of positive rotation rolls with respect to the applicator roll. However, for the purpose of more advanced metering or smoothing, reversely rotating rolls or rods, or blades or air may be attached in the opposite direction. The present invention can be applied to any of these without any problems.
【００１７】本発明の塗料の塗工は、例えば所望の塗布
量が得られるように２本のゲートロールを一定の間隔で
セットし、ロールの相対速度を調節するすることによっ
て行われる。塗料はゲートを通りロールの表面をスプリ
ットし、その半分がトランスファーロールに沿ってウェ
ブに転移し、残り半分の塗料は塗料槽にもどる。本願発
明の塗料を使用するときは、トランスファーロール塗工
の高速性を損なうこと無く従来のトランスファーロール
塗工では得られなかった５ｇ／ｍ2 以上の高塗布量を得
ることができ、５ｇ／ｍ2 以上塗布することにより、高
平滑、高光沢で印刷品質の良い塗工面が得られる。好ま
しい塗布量は、片面５〜１５ｇ／ｍ2 、より好ましく
は、６〜１２ｇ／ｍ2 である。The coating material of the present invention is applied, for example, by setting two gate rolls at regular intervals so as to obtain a desired coating amount and adjusting the relative speed of the rolls. The paint splits through the gate across the surface of the roll, half of which is transferred to the web along the transfer roll, and the other half of the paint returns to the paint bath. When the coating material of the present invention is used, a high coating amount of 5 g / m 2 or more, which cannot be obtained by the conventional transfer roll coating, can be obtained without impairing the high speed of the transfer roll coating. By applying 2 or more, a coated surface with high smoothness, high gloss and good print quality can be obtained. A preferable coating amount is 5 to 15 g / m 2 on one side, and more preferably 6 to 12 g / m 2 .
【００１８】[0018]
【作用】本発明のトランスファーロール塗工用塗料を使
用することによって、高光沢、高平滑で高印刷品質の塗
工紙が得られる理由は明かではないが次のように考えら
れる。The reason why a coated paper of high gloss, high smoothness and high printing quality can be obtained by using the transfer roll coating material of the present invention is not clear, but it is considered as follows.
【００１９】本発明の塗料は固形分濃度が高いにも関わ
らず粘度が低いので流動性に優れており、トランスファ
ーロールのロール間隙で均一な塗膜を形成することによ
って均一に塗工することができ、しかも固形分濃度が高
いのでロールの間隙と周速を調整することによって５ｇ
／ｍ2 以上の高塗布量を実現することができる。また、
塗料の固形分濃度が高いので、バインダーを含む液状成
分の原紙への浸透が小さくなり、嵩高な塗工層が形成さ
れる。そのため、不透明性が高くなるとともに、低いカ
レンダー処理でトランスファーロール塗工独特の筋状の
塗工むらを消すことができ、高い光沢度と平滑性が得ら
れる。更に、高濃度塗工によってポーラスな塗工層が形
成され、高塗布量化によるインクセットの低下を補うこ
とができるとともに、剛度も高くなるので、印刷適性が
良く、印刷品質の優れた塗工紙となる。Since the coating material of the present invention has a high solid content and a low viscosity, it is excellent in fluidity and can be applied uniformly by forming a uniform coating film in the roll gap of the transfer roll. It is possible, and the solid content is high, so 5g can be obtained by adjusting the roll gap and peripheral speed.
A high coating amount of / m 2 or more can be realized. Also,
Since the solid content concentration of the paint is high, the penetration of the liquid component containing the binder into the base paper is small, and a bulky coating layer is formed. Therefore, the opacity becomes high, and the streak-like coating unevenness peculiar to the transfer roll coating can be eliminated by a low calendar treatment, and high glossiness and smoothness can be obtained. Furthermore, a high-concentration coating forms a porous coating layer, which can compensate for the decrease in the ink set due to the high coating amount, and also increases the rigidity, resulting in good printability and excellent print quality. Becomes
【００２０】また、本発明の塗料は、トランスファーロ
ール塗工に適した範囲の粘度を有するので塗工時に塗料
のボイリングや塗料ミストの発生がなく、固形分濃度が
高いので低固形分塗料と比較して絶対的な水分量が少な
くなり、塗工直後のリードアウトロール、エキスパンダ
ーロール、アフタードライヤーの汚れが少なくなるとと
もに、塗工原紙への水分浸透量が少なくなり、乾燥負荷
が軽くなるので、塗布量が多いにも関わらず高速塗工を
行うことができる。Further, since the coating material of the present invention has a viscosity in a range suitable for transfer roll coating, it does not cause coating boiling or coating mist during coating and has a high solid content concentration, so that it is compared with a low solid content coating material. As a result, the absolute water content decreases, the read-out roll, expander roll, and after-dryer immediately after coating are less contaminated, and the amount of water permeation into the coated base paper is reduced, which reduces the drying load. High-speed coating can be performed despite the large coating amount.
【００２１】[0021]
【実施例】以下、本発明を実施例および比較例により更
に詳述するが、本発明はこれらにより限定されるもので
はない。まず、用いる接着剤溶液の調整法を示し、次い
で、トランスファーロール塗工用塗料の調整法、および
塗工紙製造例について示す。なお、以下の実施例におい
て、部及び％は特に断らない限り重量％および重量％で
ある。また、表中の配合部は全て固形分ベースである。EXAMPLES The present invention will be described in more detail below with reference to Examples and Comparative Examples, but the present invention is not limited thereto. First, a method for adjusting the adhesive solution to be used will be described, and then a method for preparing a coating material for transfer roll coating and an example of manufacturing coated paper will be described. In the following examples, parts and% are% by weight and% by weight unless otherwise specified. Moreover, all the compounding parts in the table are based on solid content.
【００２２】［接着剤溶液の調整］接着剤に水を加えて
固形分濃度を３０％に調整し、温度を９５℃以上に保ち
ながら攪拌溶解した。溶解後、温度を５０℃に調節し
て、Ｂ型粘度計を使用して６０ｒｐｍにて粘度測定を行
った。実施例に用いた低粘度澱粉系接着剤（１）〜
（３）、比較例に用いた通常澱粉系接着剤（１）〜
（２）の種類、及び粘度の測定結果を表−１に示した。[Preparation of Adhesive Solution] Water was added to the adhesive to adjust the solid content concentration to 30%, and the mixture was stirred and dissolved while keeping the temperature at 95 ° C. or higher. After the dissolution, the temperature was adjusted to 50 ° C. and the viscosity was measured at 60 rpm using a B type viscometer. Low-viscosity starch-based adhesive used in Examples (1) to
(3), ordinary starch-based adhesive (1) used in Comparative Examples
The types of (2) and the measurement results of the viscosity are shown in Table-1.
【００２３】[0023]
【表１】 [Table 1]
【００２４】［トランスファーロール塗工用塗料の調
整］指定顔料配合に、顔料に対して分散剤０．１部、水
酸化ナトリウム０．０４部を加え、セリエ分散機を用い
て水に分散し、濃度７３％の顔料スラリーを調整した。
次いで接着剤として、上記で調整した接着剤溶液と固形
分濃度５０％のＳＢラテックスを添加し、他に添加剤と
して、滑剤、耐水化剤を添加し、最後に水を加えて目標
の濃度に調整してトランスファーロール塗工用塗料とし
た。以下の実施例および比較例で使用した好ましい顔料
は、平均アスペクト比が２〜５の重質炭酸カルシウムで
ある。[Preparation of coating material for transfer roll coating] 0.1 part of a dispersant and 0.04 part of sodium hydroxide were added to the specified pigment mixture and dispersed in water using a serie disperser. A pigment slurry having a concentration of 73% was prepared.
Next, as the adhesive, the adhesive solution prepared above and SB latex with a solid content of 50% are added, and as the other additives, a lubricant and a water resistant agent are added, and finally water is added to reach a target concentration. It was adjusted to obtain a transfer roll coating material. The preferred pigment used in the following examples and comparative examples is ground calcium carbonate with an average aspect ratio of 2-5.
【００２５】［塗工紙の製造］上記のようにして得た塗
料を用い、所望の塗布量が得られるようにロールの間隙
と周速を調節して、６４ｇ／ｍ2 の上質塗工原紙に６０
０ｍ／分のスピードでトランスファーロール塗工した。
得られた塗工紙を２０℃、相対湿度６５％の条件にて１
昼夜シーズニングを行い、その後、カレンダー処理を行
った。[Production of coated paper] Using the coating material obtained as described above, the gap between the rolls and the peripheral speed are adjusted so as to obtain a desired coating amount, and a high-quality coated base paper of 64 g / m 2 is obtained. To 60
Transfer roll coating was performed at a speed of 0 m / min.
The coated paper thus obtained was subjected to 1 at 20 ° C. and 65% relative humidity.
Day / night seasoning was performed, and then calendaring was performed.
【００２６】［実施例１〜２、比較例１〜２］表−２に
示した顔料と接着剤の配合で、上記塗工用塗料調整法に
従って、実施例１、２および比較例１、２のトランスフ
ァーロール塗工用塗料を得た。また上記塗工紙製造法に
て、それぞれの塗料について塗工紙を製造した。塗料の
粘度、塗工紙の平滑度および印刷品質（光沢度、着肉む
ら）について、下記に示す測定法及び評価法により、測
定あるいは評価した結果を表ー２に示した。[Examples 1 and 2 and Comparative Examples 1 and 2] [0026] Examples 1 and 2 and Comparative Examples 1 and 2 were prepared by blending the pigments and adhesives shown in Table 2 according to the above-mentioned coating material preparation method. A coating material for transfer roll coating was obtained. In addition, coated paper was manufactured for each paint by the above-mentioned coated paper manufacturing method. The results of measurement or evaluation of the viscosity of the coating material, the smoothness of the coated paper, and the printing quality (glossiness, uneven thickness) by the measurement method and evaluation method shown below are shown in Table 2.
【００２７】［塗料粘度、白紙平滑度の測定法、印刷品
質評価法］ ＜塗料粘度＞調整した塗料濃度における粘度を、室温
で、Ｂ型粘度計の回転数６０ｒｐｍにて測定した。 ＜塗工むら＞塗工紙の塗工面の塗工むらを、目視評価に
て評価した。 ◎ 塗工むらがまったく観察されない ○ 塗工むらがほとんど観察されない △ 塗工むらが少し観察される × 塗工むらがはっきりと観察される ×× 塗工むらがひどく、斑である ＜平滑度＞塗工紙の塗工面の平滑度を王研式平滑度計に
て測定した。 ＜印刷光沢度＞ＲＩ−II型印刷試験機を用い、塗工紙の
塗工面にインキ（商品名：ＴＫマークアイ、東洋インキ
株式会社製）を０．４ｃｃ使用して印刷を行い、１昼夜
シーズニングの後、村上色彩技術研究所製の光沢度計を
用い、７５°光沢を測定した。 ＜インキ着肉むら＞ＲＩ−II型印刷試験機を用い、塗工
紙の塗工面にインキ（商品名：ＴＫマークアイ、東洋イ
ンキ株式会社製）を０．４ｃｃ使用して印刷を行い、１
昼夜シーズニングの後、インキ着肉むらを目視により５
点法（５良〜１悪）で評価した。[Paint Viscosity, Method for Measuring White Paper Smoothness, Evaluation Method for Print Quality] <Paint Viscosity> The viscosity at the adjusted paint concentration was measured at room temperature at a rotation speed of a B-type viscometer of 60 rpm. <Coating unevenness> The coating unevenness of the coated surface of the coated paper was evaluated by visual evaluation. ◎ No coating unevenness is observed ○ Almost no coating unevenness is observed △ Some coating unevenness is observed × Coating unevenness is clearly observed × × Coating unevenness is severe and uneven <Smoothness> The smoothness of the coated surface of the coated paper was measured with an Oken smoothness meter. <Printing glossiness> Using an RI-II type printing tester, 0.4 cc of ink (product name: TK Mark Eye, manufactured by Toyo Ink Co., Ltd.) was used to print on the coated surface of the coated paper, and one day and night After the seasoning, 75 ° gloss was measured using a gloss meter manufactured by Murakami Color Research Laboratory. <Ink unevenness> Using an RI-II type printing tester, 0.4 cc of ink (trade name: TK Mark Eye, manufactured by Toyo Ink Co., Ltd.) was used to print on the coated surface of the coated paper.
After seasoning day and night, 5
Evaluation was made by the point method (5 good to 1 bad).
【００２８】[0028]
【表２】 [Table 2]
【００２９】これらの実施例および比較例から明らかな
ように、本発明によるトランスファーロール塗工用塗料
を用いた塗工紙は、印刷品質に優れ、特にインキ着肉む
らに対して優れていた。比較例の塗料は片面１０ｇ／ｍ
2 塗工することが可能だが、１０ｇ／ｍ2 でもトランス
ファーロール塗工特有の塗工むら（スプリットパター
ン）が発生し、インキ着肉むら多いものであった。ま
た、塗料粘度が高いため、ボイリングが発生し、塗工時
の作業性が悪かった。As is clear from these Examples and Comparative Examples, the coated paper using the transfer roll coating composition according to the present invention was excellent in print quality, and particularly excellent in ink inking unevenness. The coating material of the comparative example is 10 g / m on one side.
Two coatings were possible, but even at 10 g / m 2 , coating unevenness (split pattern) peculiar to transfer roll coating was generated, and there was a large amount of ink unevenness. Further, since the viscosity of the coating material is high, boiling occurs and the workability during coating is poor.
【００３０】［実施例３〜４、比較例３〜８］表ー３に
示した顔料と接着剤の配合で塗料を調整し、それぞれの
塗料について片面の塗工量が５ｇ／ｍ2 、７．５ｇ／ｍ
2 の塗工紙を製造した。塗料の粘度、塗工紙の平滑度お
よび印刷品質（光沢度、着肉むら）について、実施例１
と同様の測定法及び評価法により、測定あるいは評価
し、結果を表−３に示した。[Examples 3 to 4 and Comparative Examples 3 to 8] Paints were prepared by blending the pigments and adhesives shown in Table 3, and the coating amount on one side of each paint was 5 g / m 2 , 7 0.5 g / m
Two coated papers were produced. Regarding the viscosity of the coating material, the smoothness of the coated paper, and the printing quality (glossiness, uneven thickness), Example 1
Measurement or evaluation was carried out by the same measurement method and evaluation method as in Example 1, and the results are shown in Table 3.
【００３１】[0031]
【表３】 [Table 3]
【００３２】これらの実施例から明らかなように、本発
明の塗料を用いた塗工紙は、印刷品質に優れ、特にイン
キ着肉むらに対して優れていた。比較例４、６、８は塗
工むらが発生したため、平滑度、印刷光沢は測定できな
かった。また比較例は、トランスファーロール塗工特有
の筋状のインキ着肉むらが観察された。特に比較例３、
５は筋状の塗工むらが激しく、インキ着肉むらも著しか
った。As is clear from these Examples, the coated paper using the coating material of the present invention was excellent in printing quality, and particularly excellent in ink unevenness. In Comparative Examples 4, 6 and 8, coating unevenness occurred, so that smoothness and printing gloss could not be measured. In addition, in the comparative example, streak-shaped ink unevenness peculiar to transfer roll coating was observed. Comparative Example 3,
In No. 5, the streak-like coating unevenness was severe, and the ink inking unevenness was also remarkable.
【００３３】［実施例５〜６、比較例９〜１４］表ー４
に示した顔料と接着剤の配合で塗料を調整し、それぞれ
の塗料について塗工紙を製造し、次いでより高線圧のカ
レンダー処理を行った。塗料の粘度、塗工紙の平滑度お
よび印刷品質（光沢度、着肉むら）について、実施例１
と同様の測定法及び評価法により、測定あるいは評価
し、結果を表ー４に示した。[Examples 5 to 6, Comparative Examples 9 to 14] Table 4
Paints were prepared by blending the pigment and the adhesive shown in (1) above, coated papers were produced for each paint, and then subjected to a higher linear pressure calendering treatment. Regarding the viscosity of the coating material, the smoothness of the coated paper, and the printing quality (glossiness, uneven thickness), Example 1
Measurement or evaluation was carried out by the same measurement method and evaluation method as those described above, and the results are shown in Table 4.
【００３４】[0034]
【表４】 [Table 4]
【００３５】これらの実施例から明らかなように、本発
明によるトランスファーロール塗工用塗料を用いた塗工
紙は、高い線圧でのカレンダー処理を行っても、印刷品
質に優れ、特にインキ着肉むらに対して優れたものであ
った。これに対し、比較例４、６、８は塗工むらが発生
したため、平滑度、印刷光沢は測定できなかった。また
また比較例は、トランスファーロール塗工特有の筋状の
インキ着肉むらが観察され、高線圧でカレンダー処理を
行っても改善されず、印刷品質に劣るものであった。特
に比較例３、５は筋状の塗工むらが激しく、インキ着肉
むらも著しかった。As is apparent from these examples, the coated paper using the coating material for transfer roll coating according to the present invention is excellent in printing quality even when subjected to calendering treatment at high linear pressure, and in particular, the ink is deposited. It was excellent against uneven meat. On the other hand, in Comparative Examples 4, 6, and 8, coating unevenness occurred, and thus smoothness and printing gloss could not be measured. Further, in Comparative Example, streak-like ink unevenness peculiar to transfer roll coating was observed, and even if the calendering treatment was carried out at a high linear pressure, it was not improved and print quality was inferior. In particular, Comparative Examples 3 and 5 had severe streak-like coating unevenness and marked ink unevenness.
【００３６】［実施例７〜９、比較例１５〜２０］実施
例７〜９、比較例１５〜１７は表ー５に示した顔料と接
着剤の配合で塗料を調整し、実機で塗工速度１０００ｍ
／分でトランスファーロール塗工し、線圧３０ｋｇ／ｃ
ｍでソフトカレンダー処理した。比較例１８〜２０は実
施例と同じグレードのブレード塗工による市販品であ
る。塗料の粘度、塗工紙の平滑度および印刷品質（光沢
度、着肉むら）について、実施例１と同様の測定法及び
評価法により、測定あるいは評価し、結果を表−５に示
した。[Examples 7 to 9 and Comparative Examples 15 to 20] In Examples 7 to 9 and Comparative Examples 15 to 17, coating materials were prepared by blending the pigments and adhesives shown in Table 5 and applied on an actual machine. 1000m speed
/ Min, transfer roll coating, linear pressure 30kg / c
m was calendered. Comparative Examples 18 to 20 are commercial products with the same grade of blade coating as in the Examples. The viscosity of the coating material, the smoothness of the coated paper, and the printing quality (glossiness, unevenness of inking) were measured or evaluated by the same measurement method and evaluation method as in Example 1, and the results are shown in Table-5.
【００３７】[0037]
【表５】 [Table 5]
【００３８】これらの実施例から明らかなように、本発
明によるトランスファーロール塗工用塗料を用いた塗工
紙は、同じ塗工方法で製造した比較例よりも、印刷品質
に優れ、特にインキ着肉むらに対して優れており、ま
た、一般にトランスファーロール塗工製品よりも優れて
いると言われているブレード塗工による市販品と比較し
ても、同等かそれ以上の印刷品質を有しているものであ
った。また、通常のブレード塗工での、原紙製造工程−
塗工行程を分けることなく製造することができる。ま
た、本発明のオンマシン−トランスファーロール塗工の
速度は、ブレード塗工の速度と同等か、それを超える広
幅の高速塗工をすることができた。As is clear from these examples, the coated paper using the coating material for transfer roll coating according to the present invention is superior in print quality to the comparative example prepared by the same coating method, and particularly, the ink coating. It is superior to meat unevenness, and has a print quality equivalent to or better than the commercially available product by blade coating, which is generally said to be superior to transfer roll coated products. It was something that In addition, the base paper manufacturing process with normal blade coating-
It can be manufactured without dividing the coating process. Further, the speed of the on-machine transfer roll coating of the present invention was equal to or higher than the blade coating speed, and a wide high-speed coating could be performed.
【００３９】［実施例１０〜１３、比較例２１〜２４］
表ー６に示した顔料と接着剤の配合で塗料を調整し、そ
れぞれの塗料について片面の塗工量が５ｇ／ｍ2 、８ｇ
／ｍ2 の塗工紙を製造した。塗料の粘度、塗工紙の平滑
度および印刷品質（光沢度、着肉むら）について、実施
例１と同様の測定法及び評価法により、測定あるいは評
価し、結果を表−６に示した。[Examples 10 to 13 and Comparative Examples 21 to 24]
Paints were prepared by blending the pigments and adhesives shown in Table-6, and the coating amount on each side was 5 g / m 2 , 8 g.
A coated paper of / m 2 was produced. The viscosity of the coating material, the smoothness of the coated paper, and the printing quality (glossiness, unevenness of ink) were measured or evaluated by the same measurement method and evaluation method as in Example 1, and the results are shown in Table-6.
【００４０】[0040]
【表６】 [Table 6]
【００４１】これらの実施例から明らかなように、本発
明によるトランスファーロール塗工用塗料を用いた塗工
紙は、印刷品質に優れ、特にインキ着肉むらに対して優
れているといえる。比較例２１、２４はトランスファー
塗工機の構造上８ｇ／ｍ2 の塗布量を塗工することが出
来なかった。また比較例２２、２３は塗工むらが発生
し、トランスファーロール塗工特有の筋状のインキ着肉
むらが観察された。As is apparent from these examples, the coated paper using the coating material for transfer roll coating according to the present invention is excellent in print quality, and particularly excellent in ink unevenness. Comparative Examples 21 and 24 could not be applied with a coating amount of 8 g / m 2 due to the structure of the transfer coating machine. In Comparative Examples 22 and 23, coating unevenness was generated, and streak-shaped ink unevenness peculiar to transfer roll coating was observed.
【００４２】［実施例１４〜１７、比較例２５〜３０］
表−７に示した顔料と接着剤の配合で塗料を調整し、そ
れぞれの塗料について片面の塗工量が６ｇ／ｍ2 、７．
５ｇ／ｍ2 の塗工紙を製造した。塗料の粘度、塗工紙の
平滑度および印刷品質（光沢度、着肉むら）について、
実施例１と同様の測定法及び評価法により、測定あるい
は評価し、結果を表−７に示した。[Examples 14 to 17, Comparative Examples 25 to 30]
Paints were prepared by blending the pigments and adhesives shown in Table 7, and the coating amount on one side of each paint was 6 g / m 2 , 7.
A coated paper of 5 g / m 2 was produced. Regarding the viscosity of the paint, the smoothness of the coated paper, and the print quality (glossiness, uneven thickness),
Measurement or evaluation was carried out by the same measurement method and evaluation method as in Example 1, and the results are shown in Table 7.
【００４３】[0043]
【表７】 [Table 7]
【００４４】これらの実施例から明らかなように、本発
明によるトランスファーロール塗工用塗料を用いた塗工
紙は、印刷品質に優れ、特にインキ着肉むらに対して優
れているといえる。また比較例２５〜３０は塗工むらが
発生し、トランスファーロール塗工特有の筋状のインキ
着肉むらが観察された。As is clear from these examples, the coated paper using the coating material for transfer roll coating according to the present invention is excellent in print quality, and particularly excellent in ink unevenness. Further, in Comparative Examples 25 to 30, coating unevenness was generated, and streak-shaped ink unevenness peculiar to transfer roll coating was observed.
【００４５】[0045]
【発明の効果】本発明のトランスファーロール塗工用塗
料を用いることによって、トランスファーロール塗工特
有の塗工むらを生じることなく、高塗布量化が可能とな
る。そして、トランスファーロール塗工の長所を損なう
ことなく、オンマシンでの高速で安定した操業が実現さ
れる。また、かかるトランスファーロール塗工用塗料を
塗工してなる塗工紙は、低いカレンダー条件で高平滑、
高光沢が実現され、高い不透明性、剛度、印刷品質を有
し、特に印刷光沢、インキ着肉むらに優れたもので、ブ
レード塗工に匹敵する高印刷品質の塗工紙を得ることが
できる。これにより、従来低級印刷紙を得る方法として
知られていたトランスファーロール塗工を使用して、高
級印刷紙を得ることができるという顕著な効果が得られ
た。更に、オンマシンでの高速安定な塗工によって、被
覆性に優れた塗被層が得られることから、オンマシンで
多層塗工を行うときの下塗り塗工用として優れたもので
ある。EFFECTS OF THE INVENTION By using the coating material for transfer roll coating of the present invention, it is possible to increase the coating amount without causing coating unevenness peculiar to transfer roll coating. In addition, high-speed and stable operation can be realized on-machine without impairing the advantages of transfer roll coating. Further, the coated paper obtained by applying such a transfer roll coating material has high smoothness under low calendering conditions.
Achieves high gloss, high opacity, rigidity and print quality, and is particularly excellent in print gloss and ink inking unevenness, making it possible to obtain coated paper with high print quality comparable to blade coating. . As a result, a remarkable effect that high-grade printing paper can be obtained by using transfer roll coating which has been conventionally known as a method for obtaining low-grade printing paper was obtained. Furthermore, a high-speed and stable on-machine coating provides a coating layer having excellent coating properties, and is therefore excellent as an undercoat for multi-layer coating on-machine.
Claims (5)
ァーロール塗工用塗料において、塗料固形分濃度が５８
重量％以上で、かつＢ型粘度計の No.４ローターを使用
して６０ｒｐｍで測定した塗料の粘度が１，５００ｃｐ
ｓ以下であることを特徴とするトランスファーロール塗
工用塗料。1. A transfer roll coating composition comprising a pigment and an adhesive as main components, wherein the coating solid content concentration is 58.
The viscosity of the paint is 1,500 cp when measured at 60 rpm using a No. 4 rotor of B type viscometer at a weight% or more.
s or less, a coating material for transfer roll coating.
接着剤の粘度が、固形分濃度３０重量％、温度５０℃に
おいてＢ型粘度計の No.４ローターを使用して６０ｒｐ
ｍで測定したとき３，０００ｃｐｓ未満である低粘度澱
粉系接着剤であることを特徴とする請求項１記載のトラ
ンスファーロール塗工用塗料。2. The adhesive contains a starch-based adhesive, and the viscosity of the starch-based adhesive is 60 rp at a solid content concentration of 30% by weight and a temperature of 50 ° C. using a No. 4 rotor of B type viscometer.
The transfer roll coating composition according to claim 1, which is a low-viscosity starch-based adhesive having a viscosity of less than 3,000 cps as measured by m.
以下であることを特徴とする請求項１あるいは請求項２
記載のトランスファーロール塗工用塗料。3. The average aspect ratio of the pigment in the paint is 10.
Claim 1 or Claim 2 characterized in that
The transfer coating composition described.
平均粒径２μｍ以下の炭酸カルシウムを、全顔料の３０
重量％以上含むことを特徴とする請求項１乃至３記載の
トランスファーロール塗工用塗料。4. The average aspect ratio of 5 or less in the pigment,
Calcium carbonate with an average particle size of 2 μm or less is
The transfer roll coating composition according to any one of claims 1 to 3, wherein the coating composition is contained in an amount of not less than wt%.
ァーロール塗工してなる塗工紙であって、塗布量が片面
当たり５ｇ／ｍ2 以上であることを特徴とする塗工紙。5. A coated paper obtained by applying the coating material according to claim 1 to a transfer roll, wherein the coated amount is 5 g / m 2 or more per side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6270837A JP2737897B2 (en) | 1993-11-16 | 1994-11-04 | Transfer roll coating paint and coated paper |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5-286313 | 1993-11-16 | ||
| JP28631393 | 1993-11-16 | ||
| JP6270837A JP2737897B2 (en) | 1993-11-16 | 1994-11-04 | Transfer roll coating paint and coated paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07189188A true JPH07189188A (en) | 1995-07-25 |
| JP2737897B2 JP2737897B2 (en) | 1998-04-08 |
Family
ID=26549400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6270837A Expired - Fee Related JP2737897B2 (en) | 1993-11-16 | 1994-11-04 | Transfer roll coating paint and coated paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2737897B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000170093A (en) * | 1998-12-10 | 2000-06-20 | Oji Paper Co Ltd | Production of coated, lightweight printing paper and the same paper |
| JP2009270211A (en) * | 2008-05-02 | 2009-11-19 | Daio Paper Corp | Multilayer-coated bulky coated paper |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5668187A (en) * | 1980-06-27 | 1981-06-08 | Shiraishi Kogyo Kaisha Ltd | Pigment coated paper |
| JPS57143598A (en) * | 1980-10-17 | 1982-09-04 | Shizuoka Prefecture | Paper coating liquid containing oxygen modified starch and production thereof |
| JPS63264996A (en) * | 1986-09-04 | 1988-11-01 | 本州製紙株式会社 | Coat paper for roll coater coating gravure |
| JPH01156595A (en) * | 1987-12-15 | 1989-06-20 | Sanyo Kokusaku Pulp Co Ltd | Production of paper coating solution |
| JPH0280694A (en) * | 1988-09-16 | 1990-03-20 | Kanzaki Paper Mfg Co Ltd | Production of cast coated paper |
-
1994
- 1994-11-04 JP JP6270837A patent/JP2737897B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5668187A (en) * | 1980-06-27 | 1981-06-08 | Shiraishi Kogyo Kaisha Ltd | Pigment coated paper |
| JPS57143598A (en) * | 1980-10-17 | 1982-09-04 | Shizuoka Prefecture | Paper coating liquid containing oxygen modified starch and production thereof |
| JPS63264996A (en) * | 1986-09-04 | 1988-11-01 | 本州製紙株式会社 | Coat paper for roll coater coating gravure |
| JPH01156595A (en) * | 1987-12-15 | 1989-06-20 | Sanyo Kokusaku Pulp Co Ltd | Production of paper coating solution |
| JPH0280694A (en) * | 1988-09-16 | 1990-03-20 | Kanzaki Paper Mfg Co Ltd | Production of cast coated paper |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000170093A (en) * | 1998-12-10 | 2000-06-20 | Oji Paper Co Ltd | Production of coated, lightweight printing paper and the same paper |
| JP2009270211A (en) * | 2008-05-02 | 2009-11-19 | Daio Paper Corp | Multilayer-coated bulky coated paper |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2737897B2 (en) | 1998-04-08 |
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