FILLER FOR PAPERMAKING PROCESS

The present invention relates to a process for the production of paper which comprises providing an aqueous suspension containing cellulosic fibres, introducing into the suspension a filler comprising calcium salt and cellulose derivative having a degree of substitution of net ionic groups up to 0.6...

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Main Authors KJELL RUNE ANDERSSON, SUNE WÄNNSTRÖM, PETER MARTEN HORST VAN DER, ERIK SANNE, CHERRYLEEN GARCIA-LINDGREN, MARIE-LOUISE WALLBERG
Format Patent
LanguageEnglish
Portuguese
Published 12.07.2016
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:The present invention relates to a process for the production of paper which comprises providing an aqueous suspension containing cellulosic fibres, introducing into the suspension a filler comprising calcium salt and cellulose derivative having a degree of substitution of net ionic groups up to 0.65, and dewatering the suspension to form a web or sheet of paper, wherein the calcium salt and the cellulose derivative are separately added to the cellulosic suspension and the filler is formed in situ in the cellulosic suspension.
Bibliography:Application Number: PT20100186029T