EP 2601346 A1 20130612 - MANUFACTURING PROCESS OF PAPER OR CARDBOARD HAVING IMPROVED RETENTION AND DRAINING PROPERTIES
Title (en)
MANUFACTURING PROCESS OF PAPER OR CARDBOARD HAVING IMPROVED RETENTION AND DRAINING PROPERTIES
Title (de)
HERSTELLUNGSVERFAHREN FÜR PAPIER ODER KARTON MIT VERBESSERTEN RETENTION- UND ENTWÄSSERUNGSEIGENSCHAFTEN
Title (fr)
PROCEDE DE FABRICATION DE PAPIER ET CARTON PRESENTANT DES PROPRIETES DE RETENTION ET D'EGOUTTAGE AMELIOREES
Publication
Application
Priority
- FR 1056367 A 20100802
- FR 2011051801 W 20110726
Abstract (en)
[origin: WO2012017172A1] Process for manufacturing a sheet of paper and/or board having improved retention and drainage properties, according to which, before formation of said sheet and/or board, added to the fibrous suspension are at least two retention aids respectively: a main retention aid corresponding to a (co)polymer having a cationic charge density of greater than 2 meq/g, obtained by Hofmann degradation reaction, a secondary retention aid corresponding to a water-soluble or water-swellable polymer having an anionic charge density of greater than 0.1 meq/g, characterized in that: the main retention aid is introduced into the fibrous suspension in a proportion of 100 to 800 g/t of dry pulp, the secondary retention aid is introduced into the fibrous suspension in a proportion of 50 to 800 g/t of dry pulp and has an intrinsic viscosity IV of greater than 3 dl/g.
IPC 8 full level
D21H 17/37 (2006.01); D21H 17/42 (2006.01); D21H 17/45 (2006.01); D21H 21/10 (2006.01)
CPC (source: EP KR US)
D21H 17/00 (2013.01 - KR); D21H 17/37 (2013.01 - KR); D21H 17/375 (2013.01 - EP US); D21H 17/42 (2013.01 - EP KR US); D21H 17/45 (2013.01 - EP KR US); D21H 17/72 (2013.01 - US); D21H 21/10 (2013.01 - EP KR US)
Citation (search report)
See references of WO 2012017172A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
FR 2963364 A1 20120203; FR 2963364 B1 20141226; BR 112013002371 A2 20160524; BR 112013002371 B1 20201110; CA 2807010 A1 20120209; CA 2807010 C 20171107; CN 103003491 A 20130327; CN 103003491 B 20151007; EP 2601346 A1 20130612; EP 2601346 B1 20150909; ES 2549432 T3 20151028; KR 101904358 B1 20181005; KR 20130096700 A 20130830; US 2013139986 A1 20130606; US 8999112 B2 20150407; WO 2012017172 A1 20120209
DOCDB simple family (application)
FR 1056367 A 20100802; BR 112013002371 A 20110726; CA 2807010 A 20110726; CN 201180035561 A 20110726; EP 11752300 A 20110726; ES 11752300 T 20110726; FR 2011051801 W 20110726; KR 20137002328 A 20110726; US 201313753631 A 20130130