METHOD FOR PREVENTING SOIL

METHOD FOR PREVENTING SOIL

PROBLEM TO BE SOLVED: To provide a method for preventing soil formed in a papermaking process to realize the papermaking process excellent in operability. SOLUTION: This method for preventing the soil is to use bentonite and a coagulant in the papermaking using waste paper pulp from which at least 0...

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1. Verfasser: KOSUGE MASANORI
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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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description PROBLEM TO BE SOLVED: To provide a method for preventing soil formed in a papermaking process to realize the papermaking process excellent in operability. SOLUTION: This method for preventing the soil is to use bentonite and a coagulant in the papermaking using waste paper pulp from which at least 0.5 wt.% hydrophobic substance based on the solid portion of the pulp is solvent-extracted. Preferably, the coagulant is a cationic polymer, and further preferably the coagulant is a diarylamine-based polymer. As another preferable form of the method for preventing the soil, the anionization degree of the bentonite at pH 9 is 0.2 to 1 meq/g by solid content, the coagulant and bentonite are added by 10 to 2,000 ppm and 100 to 10,000 ppm, respectively, based on the solid portion of the pulp slurry, and releasing rate is as at least 85%. COPYRIGHT: (C)2008,JPO&INPIT
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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
title METHOD FOR PREVENTING SOIL
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