EP 0910701 B1 20001011 - PROCESS FOR PRODUCING PAPER AND CARDBOARD
Title (en)
PROCESS FOR PRODUCING PAPER AND CARDBOARD
Title (de)
VERFAHREN ZUR HERSTELLUNG VON PAPIER UND KARTON
Title (fr)
PROCEDE DE FABRICATION DE PAPIER ET DE CARTON
Publication
Application
Priority
- DE 19627553 A 19960709
- EP 9703574 W 19970707
Abstract (en)
[origin: US6132558A] PCT No. PCT/EP97/03574 Sec. 371 Date Jan. 8, 1999 Sec. 102(e) Date Jan. 8, 1999 PCT Filed Jul. 7, 1997 PCT Pub. No. WO98/01623 PCT Pub. Date Jan. 15, 1998Paper and cardboard are produced by draining pulps, with sheet formation and drying of the sheets, by a process in which first (a) polyethyleneimines having a molar mass Mw of more than 500,000 or polymers containing vinylamine units and having a molar mass of from 5000 to 3 million and then (b) cationic polyacrylamides or polymers containing vinylamine units, the molar masses Mw of the polymers each being at least 4 million, are added to the pulps, and the pulp is then subjected to at least one shearing stage and is flocculated by adding bentonite, colloidal silica or clay.
IPC 1-7
IPC 8 full level
D21H 17/45 (2006.01); D21H 17/56 (2006.01); D21H 17/68 (2006.01); D21H 23/14 (2006.01); D21H 17/29 (2006.01); D21H 17/37 (2006.01)
CPC (source: EP US)
D21H 23/14 (2013.01 - EP US); D21H 17/29 (2013.01 - EP US); D21H 17/375 (2013.01 - EP US); D21H 17/455 (2013.01 - EP US); D21H 17/56 (2013.01 - EP US); D21H 17/68 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FI FR GB IT LI NL SE
DOCDB simple family (publication)
US 6132558 A 20001017; AT E196937 T1 20001015; CA 2258569 A1 19980115; CA 2258569 C 20050412; DE 19627553 A1 19980115; DE 59702462 D1 20001116; EP 0910701 A1 19990428; EP 0910701 B1 20001011; ES 2151736 T3 20010101; JP 2000514144 A 20001024; NO 990078 D0 19990108; NO 990078 L 19990108; WO 9801623 A1 19980115
DOCDB simple family (application)
US 14748699 A 19990108; AT 97930506 T 19970707; CA 2258569 A 19970707; DE 19627553 A 19960709; DE 59702462 T 19970707; EP 9703574 W 19970707; EP 97930506 A 19970707; ES 97930506 T 19970707; JP 50478198 A 19970707; NO 990078 A 19990108