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1. 发明专利

JPH05125691A PRODUCTION OF CAST-COATED PAPER 失效
公开(公告)号：JPH05125691A
公开(公告)日：1993-05-21
申请号：JP28684391
申请日：1991-10-31
申请人： KANZAKI PAPER MFG CO LTD
发明人： ASANO SHINICHI , NOJIMA KAZUHIRO , OKADA YUICHIRO , IMAI TETSUO
IPC分类号： D21H19/36 , D21H19/20
摘要： PURPOSE:To obtain the subject coated paper having excellent white paper gloss and printability and free from uneven gloss and pinhole in high efficiency by applying a water-paint to a base paper to form a coating layer, moistening and plasticizing the layer with a specific rewetting liquid and pressing the layer against a mirror-polished hot drum. CONSTITUTION:A water-paint composed mainly of a pigment and an adhesive is applied to a base paper (at a rate of preferably 5-30g/m ) and dried to form a coating layer. The coating layer is moistened and plasticized with a rewetting liquid containing (A) preferably 0.1-20wt.% of a water-soluble polymeric compound consisting of an alkali salt of a graft copolymer composed of 20-90wt.% of a styrene-acrylic acid copolymer having a styrene/acrylic acid weight ratio of (50-85)/(50-15) and 10-80wt.% of one or more monomers selected from acrylamide-type monomer, acrylonitrile-type monomer, acrylic acid ester-type monomer and acrylic acid-type monomer and (B) a releasing agent such as calcium stearate. The plasticized coating layer is pressed against a mirror- polished hot drum to obtain the objective coated paper.

2. 发明专利

JPH05140890A PRODUCTION OF CAST COATED PAPER 失效
公开(公告)号：JPH05140890A
公开(公告)日：1993-06-08
申请号：JP30209291
申请日：1991-11-18
申请人： KANZAKI PAPER MFG CO LTD
发明人： MIYAKE JUNICHI , IMAI TETSUO , ASANO SHINICHI , NOJIMA KAZUHIRO
IPC分类号： D21H19/36
摘要： PURPOSE:To efficiently obtain the subject product, excellent in white paper gloss, printability, friction and water resistance, smoothness and mold releasability and having high gloss by using a specific water-soluble polymer compound as a composition for cast coating. CONSTITUTION:A cast coating layer consisting essentially of a water-soluble polymer compound composed of an alkali salt of graft copolymer prepared by carrying out graft copolymerization of (B) a monomer selected from acrylamide-based monomers, acrylonitrile-based monomers, acrylic acid ester- based monomers and acrylic acid-based monomers with (A) a styrene.acrylic acid copolymer is initially formed on a support. The resultant cast coated paper is then brought into pressure contact with a heated metallic drum having mirror surface gloss, dried and finished. Furthermore, the water-soluble polymer compound is preferably obtained by converting the component (A) into an alkali salt with ammonia and then carrying out graft copolymerization of the component (B).

3. 发明专利

JPH05140889A COATING COMPOSITION FOR CASTING AND CAST COATED PAPER 失效
公开(公告)号：JPH05140889A
公开(公告)日：1993-06-08
申请号：JP30189191
申请日：1991-11-18
申请人： KANZAKI PAPER MFG CO LTD
发明人： ASANO SHINICHI , OKADA YUICHIRO , IMAI TETSUO , NOJIMA KAZUHIRO
IPC分类号： D21H19/36 , D21H27/00
摘要： PURPOSE:To obtain the subject composition, consisting essentially of an adhesive composed of a specific water-soluble polymer compound and a pigment and capable of efficiently providing cast coated paper having excellent smoothness and white paper gloss without any unevenness of gloss and pinholes. CONSTITUTION:The objective composition consisting essentially of (A) a pigment and (B) an adhesive composed of a water-soluble polymer compound which is an alkali salt of a graft copolymer prepared by carrying out graft copolymerization of (ii) a monomer selected from acrylamide-based monomers, acrylonitrile-based monomers, acrylic acid ester-based monomers and acrylic acid-based monomers with (i) a styrene.acrylic acid copolymer. The component (B) is preferably obtained by converting the component (i) into an alkali salt with ammonia and then carrying out the graft copolymerization of the component (ii).

4. 发明专利

JPH05125690A PRODUCTION OF CAST-COATED PAPER 失效
公开(公告)号：JPH05125690A
公开(公告)日：1993-05-21
申请号：JP28308591
申请日：1991-10-29
申请人： KANZAKI PAPER MFG CO LTD
发明人： ASANO SHINICHI , NOJIMA KAZUHIRO , IMAI TETSUO
IPC分类号： D21H19/36 , D21H23/00 , D21H23/70
摘要： PURPOSE:To obtain the subject coated paper having excellent white paper gloss and printability and free from uneven gloss and pinhole in high efficiency by applying a water-paint to a base paper to form a coating layer, moistening and plasticizing the layer with a specific rewetting liquid and pressing the layer against a mirror-polished hot drum. CONSTITUTION:A water-paint composed mainly of a pigment such as kaolin and an adhesive such as casein is applied to a base paper (at a rate of preferably 5-30g/m ) and dried to form a coating layer. The coating layer is moistened and plasticized with a rewetting liquid consisting of an aqueous liquid containing (A) preferably 0.1-20wt.% of a water-soluble polymer containing sulfonic acid (salt) group, i.e., a (co)polymer containing one or more monomers selected from aromatic hydrocarbon vinylsulfonic acid, (meth)acrylate containing sulfonic acid group, aliphatic hydrocarbon vinylsulfonic acid and their salts and (B) a releasing agent such as calcium stearate. The plasticized coating layer is pressed against a mirror-polished drum heated e.g. at >=90 deg.C to obtain the objective coated paper.

5. 发明专利

JPH0533298A PRODUCTION OF CAST COATED PAPER 失效
公开(公告)号：JPH0533298A
公开(公告)日：1993-02-09
申请号：JP18746991
申请日：1991-07-26
申请人： KANZAKI PAPER MFG CO LTD
发明人： NOJIMA KAZUHIRO , IMAI TETSUO , ASANO SHINICHI
IPC分类号： D21H25/00
摘要： PURPOSE:To efficiently obtain the subject coated paper, excellent in gloss, luster and printability with hardly any rubbing fouls and useful for press coated paper, etc., by providing an undercoating layer consisting essentially of a pigment and an adhesive on base paper and treating the resultant paper under specific conditions. CONSTITUTION:An undercoating layer consisting essentially of a pigment such as clay and an adhesive such as casein is provided on base paper and the smoothness of the undercoating layer is regulated to >=50sec value of Bekk smoothness according to JIS P8119 and a coating liquid consisting essentially of a polymer composition prepared by polymerizing a monomer such as methyl acrylate having ethylenically unsaturated bond is then applied thereon to form a casting coating layer so as to provide 0.3-5g/m dry weight. The resultant paper is then brought into pressure contact with a heated mirror-surface drum while the aforementioned coating layer is in a wet state and subsequently finished to afford the objective coated paper.

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