積層紙

Laminated paper

Abstract

PURPOSE:To facilitate regeneration of used papers in producing the laminated papers for shopping bag, etc., by forming on the paper the plastic layer consisting mainly of the acrylic ester copolymer containing, beta-unsaturated carboxylic acid and/or vinyl group-containing acid anhydride as a copolymerizing component and soluble in an alkaline solution. CONSTITUTION:Alpha, beta-unsaturated carboxylic acid and/or vinyl group- containing acid anhydride, e.g. acrylic acid, the acrylic ester of acrylic acid and/or methacrylic acid, e.g. the acrylic ester of a mono-hydric alcohol having C1-C18 and, as required, a copolymerizable vinylcontaining monomer is copolymerized to form the acrylic ester copolymer soluble in an alkaline solution at a glass-transition temperature of 40-120 deg.C and an acid value of 50-300. This copolymer is formed by a uniaxial extruder into a stretched film, which is then layered on the paper to form a laminated paper.
(57)【要約】 【目的】 紙にプラスチツク層を積層した積層紙におい て、故紙の再生パルプ化を容易にする。 【構成】 α,β−不飽和カルボン酸および/またはビ ニル基含有酸無水物を共重合成分として含むアクリル酸 エステル系共重合体を主成分とし、アルカリ性溶液に可 溶なプラスチックの層を紙に積層して積層紙を得る。こ のアクリル酸エステル系共重合体は、故紙の再生パルプ 化の際にアルカリ溶液により容易に除去することができ るので、パルプ化が極めて容易になる。

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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    EP-0739912-A2October 30, 1996Nippon Shokubai Co., Ltd.Polymer with high acid value, uses therefor, and process for producing the same
    US-6018010-AJanuary 25, 2000Nippon Shokubai Co., Ltd.Polymer with high acid value from unsaturated carboxylic acid and vinyl monomer