EP 0394368 B1 19930512 - A PROCESS FOR THE PRODUCTION OF PAPER
Title (en)
A PROCESS FOR THE PRODUCTION OF PAPER
Publication
Application
Priority
SE 8800816 A 19880308
Abstract (en)
[origin: WO8908741A1] A process for the production of paper by forming and dewatering a suspension of cellulose containing fibers and optional fillers on a wire in the presence of a cationic silica based sol and a cationic polymeric retention agent. The cationic polymeric retention agent is cationic guar gum or a cationic synthetic polymer such as cationic polyacrylamide. The combination of cationic silica sol and cationic polymeric retention agent gives improved retention of fines and fillers and eases drainage.
IPC 1-7
IPC 8 full level
D21H 17/00 (2006.01); D21H 17/24 (2006.01); D21H 17/32 (2006.01); D21H 17/37 (2006.01); D21H 17/55 (2006.01); D21H 17/63 (2006.01); D21H 17/68 (2006.01); D21H 21/10 (2006.01); D21H 23/00 (2006.01)
IPC 8 main group level
D21H (2006.01)
CPC (source: EP KR)
D21H 17/10 (2013.01 - KR); D21H 17/63 (2013.01 - KR); D21H 21/10 (2013.01 - EP); D21H 17/32 (2013.01 - EP); D21H 17/37 (2013.01 - EP); D21H 17/68 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
WO 8908741 A1 19890921; AU 3294989 A 19891005; CA 1324705 C 19931130; CN 1010599 B 19901128; CN 1035859 A 19890927; DK 215590 A 19900907; DK 215590 D0 19900907; EP 0394368 A1 19901031; EP 0394368 B1 19930512; ES 2010430 A6 19891101; FI 904384 A0 19900905; FI 93882 B 19950228; FI 93882 C 19950612; JP 2607161 B2 19970507; JP H03503299 A 19910725; KR 900700690 A 19900816; KR 920011032 B1 19921226; NZ 228206 A 19900426; SE 462721 B 19900820; SE 8800816 D0 19880308; SE 8800816 L 19890909
DOCDB simple family (application)
SE 8900062 W 19890214; AU 3294989 A 19890214; CA 593012 A 19890307; CN 89101260 A 19890307; DK 215590 A 19900907; EP 89903832 A 19890214; ES 8900817 A 19890307; FI 904384 A 19900905; JP 50349889 A 19890214; KR 890701973 A 19891225; NZ 22820689 A 19890303; SE 8800816 A 19880308