A PROCESS FOR MAKING PAPER OR PAPER BOARD.
Application 2732/MAS/1997 published 2006-07-07, filed 1997-12-27
Paper or paper board is made by adding cationic polymeric retention aid to a cellulosic suspension, shearing the suspension to degrade the resultant flocs, aggregating the suspension by adding an aqueous composition of bentonite or other anionic bridging coagulant in the presence of anionic dye, pigment or optical brightening agent, and forming paper from the aggregated suspension.
Applicant
CIBA SPECIALTY CHEMICALS WATER TREATMENTS LIMITED , AB CDM ,
P O BOX 38,LOW MOOR,BRADFORD,WEST YORKSHIRE,BD12 OJZ,, RENINGSVERKGSGATAN 5, VASTRA FROLUNDA, GOTEBORG,, ENGLAND , SWEDEN .
Inventor
International Info
Classification: D 21 H 23/76 , D 21 H 17/29 , D 21 H 17/44
Publication Number:
Priority Information
9624832.3 ENGLAND. 1996-11-28