JPH0673694A - Production of cast coated paper - Google Patents
Production of cast coated paperInfo
- Publication number
- JPH0673694A JPH0673694A JP18709092A JP18709092A JPH0673694A JP H0673694 A JPH0673694 A JP H0673694A JP 18709092 A JP18709092 A JP 18709092A JP 18709092 A JP18709092 A JP 18709092A JP H0673694 A JPH0673694 A JP H0673694A
- Authority
- JP
- Japan
- Prior art keywords
- coated paper
- paper
- cast coated
- cast
- double
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000003490 calendering Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000000049 pigment Substances 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 238000007796 conventional method Methods 0.000 abstract description 2
- 239000002932 luster Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 30
- 239000011248 coating agent Substances 0.000 description 12
- 239000011247 coating layer Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 238000005266 casting Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000008199 coating composition Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229940088990 ammonium stearate Drugs 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- JPNZKPRONVOMLL-UHFFFAOYSA-N azane;octadecanoic acid Chemical compound [NH4+].CCCCCCCCCCCCCCCCCC([O-])=O JPNZKPRONVOMLL-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000005018 casein Substances 0.000 description 2
- 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 2
- 235000021240 caseins Nutrition 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 description 1
- 229920001875 Ebonite Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 108010073771 Soybean Proteins Proteins 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229940044172 calcium formate Drugs 0.000 description 1
- 235000019255 calcium formate Nutrition 0.000 description 1
- 239000004281 calcium formate Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 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 1
- 239000006082 mold release agent Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 235000019710 soybean protein Nutrition 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Paper (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、キャスト塗被紙の仕上
げ方法に関し、特に嵩高さや剛度を損なうことなく、白
紙光沢、表面性が優れ且つ表裏差の無い両面キャスト塗
被紙の仕上げ方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for finishing cast-coated paper, and more particularly to a method for finishing double-sided cast-coated paper which is excellent in white paper gloss, has excellent surface properties, and has no difference between front and back sides without impairing bulkiness and rigidity. It is a thing.
【０００２】[0002]
【従来の技術】キャスト塗被紙と呼ばれる印刷用強光沢
塗被紙は、原紙の表面に顔料及び接着剤を主成分とする
水性顔料塗料を塗被してキャスト塗被層を設け、続いて
キャスト塗被層を加熱された金属製の鏡面ドラムに圧
着、乾燥することにより製造されている。2. Description of the Related Art A high-gloss coated paper for printing called cast coated paper is formed by coating a base paper with an aqueous pigment paint containing a pigment and an adhesive as a main component to form a cast coated layer. It is manufactured by pressing the cast coating layer onto a heated metal mirror drum and drying.
【０００３】このキャスト塗被紙の製造方法としては、
湿潤状態の塗被層を直接加熱ドラム面に圧接して光沢仕
上げするウエットキャスト法、湿潤状態の塗被層をゲル
状態にして加熱ドラム面に圧接して光沢仕上げするゲル
化キャスト法、湿潤状態の塗被層を一旦乾燥した後、再
湿潤により可塑化して加熱ドラム面に圧接するリウエッ
トキャスト法等が知られている。As a method for producing this cast coated paper,
Wet cast method in which the wet coating layer is pressed directly onto the heating drum surface to give a gloss finish, gelling casting method where the wet coating layer is brought into a gel state and pressed against the heating drum surface to give a gloss finish, wet state There is known a rewet casting method or the like in which the coating layer is once dried, then plasticized by rewetting and pressed against the surface of the heating drum.
【０００４】これらのキャスト仕上げ法は、いずれも可
塑状態にある塗被層を加熱ドラム面に圧接乾燥し、離型
させる点で共通している。All of these cast finishing methods are common in that the coating layer in the plastic state is pressed and dried on the surface of the heating drum to release it.
【０００５】上記の製造方法に従って生産されるキャス
ト塗被紙の多くは片面キャストでその裏面は上質紙が使
用されている。Most of the cast coated papers produced according to the above-mentioned manufacturing method are single-sided casts, and fine paper is used for the back surface thereof.
【０００６】キャスト塗被紙は高い光沢度と平滑性及び
嵩高さを有しており、その印刷物は特有の美しい仕上が
りを発揮するのが特徴である。したがって従来より両面
共に鏡面仕上げされた両面キャスト塗被紙が要望されて
いる。The cast coated paper has high glossiness, smoothness and bulkiness, and the printed matter is characterized by exhibiting a peculiar beautiful finish. Therefore, there has been a demand for a double-sided cast coated paper having both surfaces mirror-finished.
【０００７】両面キャスト塗被紙を製造するには、先ず
原紙の片面に顔料と接着剤を主成分とする塗被紙を塗被
し、鏡面を有する加熱ドラムに圧接乾燥して光沢仕上げ
し、これを一旦巻取り、あるいは連続して再度その反対
面に前記と同様の塗被液を塗被し加熱ドラムに圧接乾燥
して両面光沢仕上げする方法が取られる。In order to produce a double-sided cast coated paper, first, one side of a base paper is coated with a coated paper containing a pigment and an adhesive as main components, and is pressed and dried on a heating drum having a mirror surface to give a gloss finish. A method is employed in which this is wound up once, or continuously applied again to the opposite surface thereof with the same coating solution as described above, and is pressed and dried on a heating drum to finish gloss on both sides.
【０００８】ところが、この方法によって両面キャスト
塗被紙を製造する場合は片面キャスト塗被紙とは異なっ
た問題が生じている。However, when a double-sided cast coated paper is produced by this method, a problem different from that of the single-sided cast coated paper occurs.
【０００９】即ち、品質面では、後からキャスト仕上げ
される側の塗料中の水分が、加熱乾燥工程で急激に蒸気
となって発生し、原紙層及び先にキャスト仕上げされた
鏡面光沢塗被層面を通過して蒸発し、その際の熱と水分
により折角形成された先キャスト面の平滑性及び光沢を
極端に低下させる。このため、白紙品質において表裏差
が著しくなり、表裏差の無い良好なキャスト紙を得るこ
とができない。That is, in terms of quality, the water in the paint on the side to be subsequently cast-finished suddenly turns into steam in the heating and drying process, and the base paper layer and the surface of the mirror-finished glossy coating layer previously cast-finished. To evaporate, and the heat and moisture at that time extremely reduce the smoothness and gloss of the precast surface formed at a corner. For this reason, the difference between the front and the back becomes significant in the quality of the white paper, and it is not possible to obtain a good cast paper without the front and back.
【００１０】両面キャスト紙におけるこのような問題を
改良するために、たとえばスーパーカレンダーやソフト
カレンダー等でカレンダー掛けして仕上げする方法が提
案されている。しかしこれにらの方法は、一方でキャス
ト塗被紙の特徴である低密度で嵩高く、且つ剛度が高い
という利点を損なうことになってしまう。In order to improve such a problem in the double-sided cast paper, a method of calendering with a super calendar or a soft calendar has been proposed. However, these methods, on the other hand, impair the advantages of cast coated paper, which are low density, bulky, and high in rigidity.
【００１１】[0011]
【発明が解決しようとする課題】本発明は、キャスト塗
被紙の特徴である低密度で嵩高く、且つ剛度が高いとい
う利点を損なうことなく塗被層表面の品質及び操業性に
優れた表裏差の無い両面キャスト紙を効率良く仕上げる
方法を提供するものである。DISCLOSURE OF THE INVENTION The present invention provides a front and back surface having excellent quality and operability of the surface of a coated layer without impairing the advantages of cast coated paper such as low density, bulkiness and high rigidity. It is intended to provide a method for efficiently finishing a double-sided cast paper with no difference.
【００１２】[0012]
【課題を解決するための手段】かかる現状に鑑み、本発
明者らは、顔料及び接着剤を主成分とする両面キャスト
塗被紙の仕上げ方法において、加熱蒸気による加湿、加
熱処理及びソフトカレンダー処理技術を導入する方法を
見い出した。即ちキャスト加工後の塗被層表面を低圧で
軽度の加熱蒸気を付与し加湿かつ加熱した後、１００℃
以上でソフトカレンダー処理を行うことにより、従来法
におけるスーパーカレンダー処理や単なるソフトカレン
ダー処理のようにキャスト塗被紙の嵩高さや剛度を損な
うことなく光沢及び光沢の均質性を高め表裏差の無い良
好な表面を得ようとするものである。In view of the present situation, the inventors of the present invention have proposed a method for finishing a double-sided cast coated paper containing a pigment and an adhesive as main components, such as humidification with heated steam, heat treatment and soft calender treatment. We have found a way to introduce technology. That is, the surface of the coating layer after the casting process is humidified and heated by applying a mild heating steam at a low pressure and then at 100 ° C.
By performing the soft calendering process as described above, it is possible to enhance gloss and homogeneity of glossiness without impairing the bulkiness and rigidity of the cast coated paper as in the super calendering process or the simple soft calendering process in the conventional method. It is about trying to get the surface.
【００１３】加熱蒸気処理は、紙と平行かつ対向させた
ノズルから紙表面に一定の角度で噴出し、蒸気が紙表面
に付着して適度に紙の温度と水分を上昇かつ調整ができ
れば良く、例えば特願平３−３５６３２４、１６９０７
８、１６６１７５記載の装置等が使用できる。このとき
の加熱蒸気の圧力は１ｋｇ／ｃｍ2以下で、蒸気流量が
１５〜８０ｋｇ／Ｈｒ／ｍ幅で操作できる。The heating steam treatment may be carried out if the steam is ejected at a constant angle from the nozzles parallel to and facing the paper to the paper surface and the steam adheres to the paper surface to appropriately raise and adjust the temperature and moisture of the paper. For example, Japanese Patent Application No. 3-356324, 16907
The device described in 8,166175 can be used. At this time, the pressure of the heated steam is 1 kg / cm 2 or less, and the steam flow rate can be operated in the range of 15 to 80 kg / Hr / m.
【００１４】また本発明を実施するためには耐熱、耐圧
性に優れた特殊樹脂ロールを有するソフトカレンダー法
を用いることが望ましい。In order to carry out the present invention, it is desirable to use a soft calender method having a special resin roll having excellent heat resistance and pressure resistance.
【００１５】ソフトカレンダー処理温度は１００℃以上
で行われ、１００℃未満では嵩高さや剛度を損なうこと
なく満足すべき表面性を得ることができない。またロー
ルの耐久性からみて２００℃以下が好ましい。The soft calendering temperature is 100 ° C. or higher, and if the temperature is lower than 100 ° C., satisfactory surface properties cannot be obtained without impairing bulkiness and rigidity. Further, it is preferably 200 ° C. or lower in view of the durability of the roll.
【００１６】以上の条件でカレンダー処理しキャスト加
工後の表面性を向上させることにより、嵩高さ及び剛度
を著しく損なうことなく、先キャスト面の低下した平滑
性及び光沢を後キャスト面の平滑性及び光沢と同じレベ
ルまで品質が改善できる。By calendering under the above conditions to improve the surface property after casting, the lowered smoothness and luster of the front cast surface and the smoothness of the rear cast surface can be achieved without significantly impairing the bulkiness and the rigidity. Quality can be improved to the same level as gloss.
【００１７】本発明の仕上げ方法で適用されるキャスト
塗被紙の製造方法としては、ウエットキャスト法、リウ
エットキャスト法、ゲル化キャスト法等、特に限定する
ものではなく、更に両面とも同じキャスト方式を採る必
要はなく、例えば片面はウエットキャスト法で反対面は
リウエットキャスト法の如く適宜任意の方法を組み合わ
せて製造することができる。The method for producing the cast coated paper applied by the finishing method of the present invention is not particularly limited, such as a wet casting method, a rewet casting method, a gelling casting method, and the same casting method on both sides. It is not necessary to adopt the above method. For example, one side can be manufactured by a wet casting method and the other surface can be manufactured by combining any appropriate methods such as a rewet casting method.
【００１８】本発明で使用するソフトカレンダーの特殊
樹脂としてはウレタン樹脂、ポリエーテル樹脂、エボナ
イト系ゴム等が使用され表面強度がショアＤ硬度で６０
〜９３のものが好ましい。As the special resin of the soft calender used in the present invention, urethane resin, polyether resin, ebonite rubber or the like is used, and the surface strength is 60 in Shore D hardness.
Those of .about.93 are preferable.
【００１９】本発明の方法において塗被層を形成するた
めに用いられる塗被組成物は、従来のキャスト塗被紙用
組成物と同様顔料及び接着剤を主たる成分とする組成物
が用いられる。As the coating composition used for forming the coating layer in the method of the present invention, a composition containing a pigment and an adhesive as main components is used as in the conventional composition for cast coated paper.
【００２０】塗被顔料としてはクレー、炭酸カルシウ
ム、サチンホワイト、水酸化アルミニウム、硫酸バリウ
ム等を一種または二種以上混合して使用する。接着剤と
してはカゼイン、大豆タンパク、スチレン・ブタジエン
等の共役シエン系、アクリル酸エステル等のアクリル
系、エチレン・酢酸ビニル等のビニル系重合体等のラテ
ックスを顔料１００重量部に対し５〜３０重量部併用し
て配合する。As the coating pigment, clay, calcium carbonate, satin white, aluminum hydroxide, barium sulfate, etc. may be used alone or in combination of two or more. As the adhesive, 5 to 30 parts by weight of latex such as casein, soybean protein, conjugated silane type such as styrene and butadiene, acrylic type such as acrylate, vinyl type polymer such as ethylene and vinyl acetate based on 100 parts by weight of the pigment. Combined in combination with one part.
【００２１】尚、更に必要に応じて従来のキャストコー
ト用の塗被液組成物に用いられている剥離剤、消泡剤、
分散剤等も使用することができる。Further, if necessary, a release agent, a defoaming agent, or the like used in the conventional coating liquid composition for cast coating,
A dispersant or the like can also be used.
【００２２】かくして調製された塗被組成物は一般の塗
被紙製造に用いられているブレードコーター、エアナイ
フコーター、ロールコーター、ブラシコーター、カーテ
ンコーター、バーコーター、グラビアコーター、サイズ
プレスコーター等の塗被装置を設けたオンマシン或いは
オフマシンコーターによって原紙上に一層或いは多層に
分けて塗被される。その際の塗被組成物の固形分濃度
は、一般に４０〜６５重量％であるが、操業性を考慮す
ると４５〜６０重量％の範囲が好ましい。The coating composition thus prepared is used in the production of general coated paper such as a blade coater, an air knife coater, a roll coater, a brush coater, a curtain coater, a bar coater, a gravure coater and a size press coater. An on-machine or off-machine coater provided with a device is used to coat the base paper in one or more layers. The solid content concentration of the coating composition at that time is generally 40 to 65% by weight, but in consideration of operability, it is preferably in the range of 45 to 60% by weight.
【００２３】また、原紙としては一般の印刷用塗被紙や
キャスト塗被紙に用いられる坪量３０〜４００ｇ／ｍ2
のペーパーベース或いはボードベースの原紙が用いられ
る。これらは酸性或いは中性抄紙で抄造される原紙であ
り、高歩留パルプを約１０重量％以上含む中質原紙も勿
論使用できる。また、予備塗工やキャスト塗被層の裏面
に一般の顔料コーティング層を設けたような塗被紙も原
紙として使用可能である。Further, as the base paper, the basis weight used in general coated paper for printing or cast coated paper is 30 to 400 g / m 2
Paper-based or board-based base paper is used. These are base papers produced by acidic or neutral papermaking, and of course, medium-quality base papers containing about 10% by weight or more of high-yield pulp can be used. Further, a coated paper in which a general pigment coating layer is provided on the back surface of the preliminary coating or cast coating layer can also be used as the base paper.
【００２４】かかる原紙への塗被組成物は乾燥重量で１
０〜３５ｇ／ｍ2程度塗被されるが、得られるキャスト
塗被紙の品質、キャスト塗被速度の改良効果の点から、
１５〜２５ｇ／ｍ2の範囲で調整されるのが最も好まし
い。The coating composition for such a base paper has a dry weight of 1
About 0 to 35 g / m 2 is applied, but from the viewpoint of improving the quality of the obtained cast coated paper and the cast coating speed,
Most preferably, it is adjusted in the range of 15 to 25 g / m 2 .
【００２５】[0025]
【実施例】以下に本発明の実施例を記載するが、勿論こ
れらに限定されるものではない。また、例中の部及び％
は特に断らない限り、それぞれ重量部、重量％を表す。EXAMPLES Examples of the present invention will be described below, but of course the present invention is not limited thereto. Also, parts and% in the examples
Represents parts by weight and% by weight, respectively, unless otherwise specified.
【００２６】実施例１ カオリン１００部、分散剤（ポリアクリル酸ソーダ）
０．３部をコーレス分散機を用いて水中に分散し、固形
分濃度６０％の顔料スラリーを調製した。これに消泡剤
（トリブチルフォスフェート）０．５部、離型剤（ステ
アリン酸アンモニウム）５部、接着剤として固形分濃度
１５％のカゼイン水溶液１０部（固形分）、スチレン・
ブタジエン共重合体ラテックス（住友ノーガタック社製
ＳＮ−３０７）１５部（固形分）を加え、更に水を加え
て、固形分５０％の塗被液を調製した。又、ゲル化液と
して離型剤（ステアリン酸アンモニウム）０．３％を含
む５％ギ酸カルシウム溶液を調整した。得られた塗被液
を用いてゲル化キャストを行った。即ち、坪量７０ｇ／
ｍ2のキャスト塗被紙用原紙に塗被量が乾燥重量で２５
ｇ／ｍ2となるように上記の塗被液をロールコーターで
塗被し、次いでゲル化液に接触させて塗被層をゲル化さ
せた。その後、直径７５０ｍｍのゴム被覆されたプレス
ロールと表面温度９０℃、直径３０００ｍｍのキャスト
ドラムに圧接し、乾燥後テークオフロールでキャストド
ラムから剥離して片面のキャスト塗被紙を得た後、反対
面にも同様な操作を行い、両面キャスト塗被紙を得た。
なおスピードは５０ｍ／分にて加工した。 Example 1 100 parts of kaolin, dispersant (sodium polyacrylate)
0.3 part was dispersed in water using a Choles disperser to prepare a pigment slurry having a solid content concentration of 60%. 0.5 parts of antifoaming agent (tributyl phosphate), 5 parts of mold release agent (ammonium stearate), 10 parts of 15% solid casein solution (solid content) as adhesive, styrene.
15 parts (solid content) of butadiene copolymer latex (SN-307 manufactured by Sumitomo Nogatac Co., Ltd.) were added, and water was further added to prepare a coating liquid having a solid content of 50%. A 5% calcium formate solution containing 0.3% of a release agent (ammonium stearate) was prepared as a gelling solution. Gelling cast was performed using the obtained coating liquid. That is, the basis weight is 70 g /
25 m 2 of dry coated weight of m 2 cast base paper
The above coating liquid was coated by a roll coater so that the coating layer would be g / m 2, and then contacted with a gelling liquid to gel the coating layer. Then, it was pressed against a rubber-coated press roll with a diameter of 750 mm and a cast drum with a surface temperature of 90 ° C. and a diameter of 3000 mm, and after drying, it was peeled from the cast drum with a take-off roll to obtain a cast coated paper on one side, and then the other side. The same operation was performed to obtain a double-sided cast coated paper.
The speed was 50 m / min.
【００２７】この様にして得た両面キャスト紙を、蒸気
圧０．８ｋｇ／ｃｍ2、蒸気流量５０ｋｇ／Ｈｒ／ｍ幅
で蒸気を噴射し、加熱温度１２０℃で先にキャスト加工
した面が金属ロールに接するようにしてソフトカレンダ
ー処理した。尚、ニップ線圧は表面（先塗工面）の平滑
度が４０００〜５０００ｓｅｃとなる条件で行った。The double-sided cast paper thus obtained is sprayed with steam at a steam pressure of 0.8 kg / cm 2 and a steam flow rate of 50 kg / Hr / m width, and the surface cast previously at a heating temperature of 120 ° C. is a metal. A soft calendar treatment was performed so as to be in contact with the roll. The nip linear pressure was applied under the condition that the smoothness of the surface (pre-coated surface) was 4000 to 5000 sec.
【００２８】比較例１ ソフトカレンダー処理温度が８０℃である以外は上記実
施例１と同様にして両面キャスト塗被紙の表面仕上げを
行った。 Comparative Example 1 A double-sided cast coated paper was surface-finished in the same manner as in Example 1 except that the soft calendering temperature was 80 ° C.
【００２９】比較例２ 蒸気加湿を行わない以外は上記実施例１と同様にして両
面キャスト塗被紙の表面仕上げを行った。 Comparative Example 2 A double-sided cast coated paper was surface-finished in the same manner as in Example 1 except that steam humidification was not performed.
【００３０】比較例３ ソフトカレンダーによる表面仕上げ処理を行わない以外
は上記実施例１と同様。 Comparative Example 3 The same as Example 1 except that the surface finishing treatment with a soft calendar was not performed.
【００３１】各実施例及び比較例で得られたキャスト塗
被紙の品質評価結果を下記の表１に併記した。尚、表１
中の、白紙光沢、平滑度、剛度、目視表裏差は次のよう
にして求めた。The quality evaluation results of the cast coated papers obtained in the respective examples and comparative examples are also shown in Table 1 below. Table 1
The white paper glossiness, smoothness, rigidity, and visual difference between front and back were determined as follows.
【００３２】[0032]
【表１】 目視の表裏差：白紙を目視で観察し、光沢、平滑等の総
合的な表面性評価から表裏差を判定した。[Table 1] Visual difference between front and back : White paper was visually observed, and the difference between front and back was judged by comprehensive evaluation of surface properties such as gloss and smoothness.
【００３３】○：キャスト塗被面の表裏差は殆どない。◯: There is almost no difference between the front and back of the cast coated surface.
【００３４】△：キャスト塗被面の表裏差が小さい。Δ: The difference between the front and back of the cast coated surface is small.
【００３５】×：キャスト塗被面の表裏差が大きい。X: The difference between the front and back of the cast coated surface is large.
【００３６】白紙光沢：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。 White paper gloss : 75 ° gloss was measured using a gloss meter manufactured by Murakami Color Research Laboratory.
【００３７】平滑度：ＪＡＰＡＮ Ｔａｐｐｉ Ｎｏ．
５ 王研式平滑度試験器で測定した。 Smoothness : Japan Tappi No.
5 Measured with an Oken type smoothness tester.
【００３８】剛度：ＪＩＳ Ｐ８１４３に準じクラーク
剛さ試験器で測定した。Stiffness: Measured with a Clark stiffness tester according to JIS P8143.
【００３９】[0039]
【発明の効果】表−１から明かのように、実施例１は低
密度（かさ高）で白紙光沢度、平滑度、剛度が高く、表
裏差が少ない。比較例１〜３は密度、剛度あるいは表面
性の表裏差において劣る。As is apparent from Table 1, Example 1 has low density (bulkness), high glossiness of white paper, high smoothness, and high rigidity, and little difference between front and back. Comparative Examples 1 to 3 are inferior in terms of density, rigidity or surface difference.
【００４０】したがって、本発明の製造方法により製造
された両面キャストコート紙は従来にない優れた品質を
与えその製品価値は極めて大なるものがある。Therefore, the double-sided cast coated paper produced by the production method of the present invention has an unprecedentedly excellent quality and its product value is extremely great.
【図１】図１は本発明の実施例及び比較例で用いた仕上
げ装置の概略図である。 １：蒸気加湿装置 ２：ソフトカレンダー （１）：弾
性ロール （２）：金属ロールFIG. 1 is a schematic view of a finishing apparatus used in Examples and Comparative Examples of the present invention. 1: Steam humidifier 2: Soft calendar (1): Elastic roll (2): Metal roll
【手続補正書】[Procedure amendment]
【提出日】平成４年９月９日[Submission date] September 9, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００７[Correction target item name] 0007
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００７】両面キャスト塗被紙を製造するには、先ず
原紙の片面に顔料と接着剤を主成分とする塗被液を塗被
し、鏡面を有する加熱ドラムに圧接乾燥して光沢仕上げ
し、これを一旦巻取り、あるいは連続して再度その反対
面に前記と同様の塗被液を塗被し加熱ドラムに圧接乾燥
して両面光沢仕上げする方法が取られる。In order to produce a double-sided cast coated paper, first, one side of a base paper is coated with a coating solution containing a pigment and an adhesive as a main component, and is pressed and dried on a heating drum having a mirror surface to give a gloss finish. A method is employed in which this is wound up once, or continuously applied again to the opposite surface thereof with the same coating solution as described above, and is pressed and dried on a heating drum to finish gloss on both sides.
Claims (1)
とするキャスト塗被層を有する両面キャスト塗被紙の製
造方法において、該キャスト塗被紙表面を低圧で軽度の
加熱蒸気を付与し加湿かつ加熱した後、温度が１００℃
以上でソフトカレンダー処理することを特徴とするキャ
スト塗被紙の製造法。1. A method for producing a double-sided cast coated paper having a cast coated layer containing a pigment and an adhesive as a main component on both sides of a base paper, wherein the surface of the cast coated paper is applied with low pressure and mild heating steam. After humidifying and heating, the temperature is 100 ℃
A method for producing cast coated paper, which is characterized in that soft calendering is performed as described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18709092A JP3279648B2 (en) | 1992-07-14 | 1992-07-14 | Manufacturing method of cast coated paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18709092A JP3279648B2 (en) | 1992-07-14 | 1992-07-14 | Manufacturing method of cast coated paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0673694A true JPH0673694A (en) | 1994-03-15 |
| JP3279648B2 JP3279648B2 (en) | 2002-04-30 |
Family
ID=16199935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18709092A Expired - Fee Related JP3279648B2 (en) | 1992-07-14 | 1992-07-14 | Manufacturing method of cast coated paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3279648B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010144291A (en) * | 2008-12-19 | 2010-07-01 | Hokuetsu Kishu Paper Co Ltd | Method for producing cast-coated paper and production apparatus therefor |
-
1992
- 1992-07-14 JP JP18709092A patent/JP3279648B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010144291A (en) * | 2008-12-19 | 2010-07-01 | Hokuetsu Kishu Paper Co Ltd | Method for producing cast-coated paper and production apparatus therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3279648B2 (en) | 2002-04-30 |
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