EP 0500770 B1 19930908 - A PROCESS FOR THE PRODUCTION OF PAPER
Title (en)
A PROCESS FOR THE PRODUCTION OF PAPER
Publication
Application
Priority
SE 8903752 A 19891109
Abstract (en)
[origin: WO9107543A1] A process for the production of paper by forming and dewatering a suspension of cellulose containing fibers and optional fillers on a wire. Three components are added to the suspension, a cationic starch, a cationic polyacrylamide and a polymeric silicic acid, in order to improve retention and dewatering at paper production.
IPC 1-7
IPC 8 full level
D21H 17/28 (2006.01); D21H 17/00 (2006.01); D21H 17/29 (2006.01); D21H 17/37 (2006.01); D21H 17/63 (2006.01); D21H 17/68 (2006.01); D21H 21/10 (2006.01)
CPC (source: EP)
D21H 17/00 (2013.01); D21H 17/29 (2013.01); D21H 17/375 (2013.01); D21H 17/68 (2013.01); D21H 21/10 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9107543 A1 19910530; AT E94231 T1 19930915; AU 637850 B2 19930610; AU 6732890 A 19910613; CA 2069308 C 19960130; DE 69003249 D1 19931014; DE 69003249 T2 19940331; EP 0500770 A1 19920902; EP 0500770 B1 19930908; ES 2046040 T3 19940116; FI 100611 B 19980115; FI 922055 A0 19920506; FI 922055 A 19920506; JP H04505351 A 19920917; SE 8903752 D0 19891109
DOCDB simple family (application)
SE 9000688 W 19901024; AT 91900405 T 19901024; AU 6732890 A 19901024; CA 2069308 A 19901024; DE 69003249 T 19901024; EP 91900405 A 19901024; ES 91900405 T 19901024; FI 922055 A 19920506; JP 51582890 A 19901024; SE 8903752 A 19891109