EP 1727938 B1 20080402 - METHOD FOR PRODUCING PAPER, PAPERBOARD AND CARDBOARD
Title (en)
METHOD FOR PRODUCING PAPER, PAPERBOARD AND CARDBOARD
Title (de)
VERFAHREN ZUR HERSTELLUNG VON PAPIER, PAPPE UND KARTON
Title (fr)
PROCEDE DE FABRICATION DE PAPIER, DE CARTON-PATE ET DE CARTON
Publication
Application
Priority
- EP 2005002685 W 20050314
- DE 102004013007 A 20040316
Abstract (en)
[origin: WO2005090678A1] The inventive method for producing paper, paperboard and cardboard by removing interfering substance-containing water from a paper pulp in the presence of polymers containing vinylamine units whose mean molecular mass Mw is equal or greater than one million. Said method consists in preparing, at first a high-density pulp, introducing a doses quantity at least of one type polymer which contains vinylamine units and whose mean molecular mass Mw is equal or greater than one million and a degree of hydrolysis ranges from 1 to 20 mol % in the high-density pulp, in diluting said high-density pulp by adding water until a low-density pulp is obtained and in dewatering said low-density pulp. Said invention also relates to the use of homo-or copolymers of N-vinyl carboxylic acid amides having a degree of hydrolysis ranging from 1 to 20 mol % and a mean molecular mass Mw equal or greater than one million for producing paper, paperboard and cardboard in the form of an additive to the high-density pulp containing interfering substances in order to reduce deposits formed in the sieving, pressing and drying areas of paper machines.
IPC 8 full level
D21H 17/34 (2006.01); D21H 17/56 (2006.01); D21H 21/02 (2006.01); D21H 17/37 (2006.01)
CPC (source: EP KR US)
D21F 13/00 (2013.01 - KR); D21H 17/34 (2013.01 - KR); D21H 21/02 (2013.01 - EP US); D21H 17/37 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005090678 A1 20050929; AT E391207 T1 20080415; BR PI0508262 A 20070731; CA 2558277 A1 20050929; CA 2558277 C 20131112; CN 1934315 A 20070321; CN 1934315 B 20100818; DE 102004013007 A1 20051006; DE 502005003567 D1 20080515; EP 1727938 A1 20061206; EP 1727938 B1 20080402; KR 101136290 B1 20120424; KR 20070011377 A 20070124; US 2007181274 A1 20070809; US 2013014908 A1 20130117; US 8337665 B2 20121225; US 8486227 B2 20130716; ZA 200608558 B 20080625
DOCDB simple family (application)
EP 2005002685 W 20050314; AT 05716030 T 20050314; BR PI0508262 A 20050314; CA 2558277 A 20050314; CN 200580008313 A 20050314; DE 102004013007 A 20040316; DE 502005003567 T 20050314; EP 05716030 A 20050314; KR 20067021462 A 20050314; US 201213609356 A 20120911; US 59093305 A 20050314; ZA 200608558 A 20061013