FOERFARANDE FOER FRAMSTAELLNING AV PAPPER MED HOEG TORRHAOLLFASTHET OCH LAOG VAOTHAOLLFASTHET

In order to increase the dry strength of paper without at the same time significantly increasing its wet strength, paper is surface-sized with an aqueous solution of an alkali metal salt and/or an alkaline earth metal salt of a copolymer of a) from 90 to 30% by weight of acrylic acid and/or methacry...

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Bibliographic Details
Main Authors PFOHL SIGBERG, STEDEFEDER JOACHIM, GUENDER WOLF
Format Patent
LanguageFinnish
Published 10.12.1982
Edition3
Subjects
IMPREGNATING OR COATING OF PAPER
PAPER NOT OTHERWISE PROVIDED FOR
PAPER-MAKING
PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D
PRODUCTION OF CELLULOSE
PULP COMPOSITIONS
TEXTILES
TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Summary:In order to increase the dry strength of paper without at the same time significantly increasing its wet strength, paper is surface-sized with an aqueous solution of an alkali metal salt and/or an alkaline earth metal salt of a copolymer of a) from 90 to 30% by weight of acrylic acid and/or methacrylic acid, and b) from 10 to 70% by weight of acrylonitrile, methacrylonitrile, acrylamide and/or methacrylamide, with or without c) up to 30% by weight of an ester of acrylic acid and/or an ester of methacrylic acid, the copolymer having a viscosity of from 5 to 100 mPas in 2% by weight strength aqueous solution at 20 DEG C, measured in a Brookfield viscometer at 20 revolutions per minute.
Bibliography:Application Number: FI19780002798