EP 0335575 B2 20000823 - Production of paper and paper board
Title (en)
Production of paper and paper board
Title (de)
Herstellung von Papier und Pappe
Title (fr)
Fabrication de papier et carton
Publication
Application
Priority
- GB 8807444 A 19880328
- GB 8815219 A 19880627
Abstract (en)
[origin: EP0335575A2] Paper or paper board is made by providing an aqueous cellulosic suspension containing a cationic polymer and then adding cationic starch or a high molecular weight synthetic cationic polymer, subjecting the suspension to shear, and then adding inorganic material selected from bentonite or colloidal silica. The process is of particular value when the suspension is formed from a mechanically derived pulp and/or deinked pulp and when the product is to be newsprint or board.
IPC 1-7
IPC 8 full level
D21H 17/34 (2006.01); D21H 17/28 (2006.01); D21H 17/33 (2006.01); D21H 17/37 (2006.01); D21H 17/47 (2006.01); D21H 17/49 (2006.01); D21H 17/56 (2006.01); D21H 17/63 (2006.01); D21H 17/67 (2006.01); D21H 23/02 (2006.01); D21H 23/76 (2006.01); D21H 11/08 (2006.01); D21H 11/14 (2006.01); D21H 17/29 (2006.01); D21H 17/44 (2006.01); D21H 17/68 (2006.01); D21H 21/10 (2006.01)
CPC (source: EP KR)
D21H 17/28 (2013.01 - KR); D21H 23/16 (2013.01 - KR); D21H 23/76 (2013.01 - KR); D21H 23/765 (2013.01 - EP); D21H 11/08 (2013.01 - EP); D21H 11/14 (2013.01 - EP); D21H 17/29 (2013.01 - EP); D21H 17/44 (2013.01 - EP); D21H 17/68 (2013.01 - EP); D21H 21/10 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0335575 A2 19891004; EP 0335575 A3 19901212; EP 0335575 B1 19930310; EP 0335575 B2 20000823; AU 3174989 A 19890928; AU 613465 B2 19910801; CA 1322435 C 19930928; DE 68905208 D1 19930415; DE 68905208 T2 19931007; DE 68905208 T3 20010215; ES 2053980 T3 19940801; ES 2053980 T5 20001216; FI 891465 A0 19890328; FI 891465 A 19890929; FI 97307 B 19960815; FI 97307 C 19971111; JP H026683 A 19900110; JP H05239800 A 19930917; JP H0529719 B2 19930506; KR 890014836 A 19891025; KR 960002733 B1 19960226; NO 174724 B 19940314; NO 891301 D0 19890328; NO 891301 L 19890929
DOCDB simple family (application)
EP 89302842 A 19890322; AU 3174989 A 19890328; CA 594866 A 19890328; DE 68905208 T 19890322; ES 89302842 T 19890322; FI 891465 A 19890328; JP 24995592 A 19920918; JP 7481389 A 19890327; KR 890003911 A 19890328; NO 891301 A 19890328