EP 2888404 A1 20150701 - 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)
PROCÉDÉ DE FABRICATION DE PAPIER, DE CARTON-PÂTE ET DE CARTON
Publication
Application
Priority
- EP 12181322 A 20120822
- EP 2013066120 W 20130731
- EP 13745049 A 20130731
Abstract (en)
[origin: WO2014029593A1] The invention relates to a method for producing paper, paperboard and cardboard, comprising the dehydration of a paper material comprising filler material, which contains at least one water-soluble polymer, forming sheets in the wire section and subsequent pressing of the paper in the press section, wherein the at least one water-soluble polymer is dosed to a paper material having a fiber concentration in the range of 20 to 40 g/l, the paper material is then thinned to a fiber concentration in the range of 5 to 15 g/l, the thinned paper material is dehydrated, forming a sheet, and the sheet is pressed in the press section to a solids content G(x) wt % or greater and G(x) is calculated according to G(x) = 48 + (x -15).0.4, where x stands for the numerical value of the filler material content of the dry paper, paperboard or cardboard (in wt %) and G(x) stands for the numerical value of the minimum solids content (in wt %) on which the sheet is pressed, wherein the water-soluble polymer is obtainable via Hofmann reduction of a polymer comprising acrylamide and/or methacrylamide and optionally subsequent post-curing.
IPC 8 full level
D21H 17/38 (2006.01); D21H 17/44 (2006.01); D21H 17/45 (2006.01); D21H 17/67 (2006.01); D21H 21/06 (2006.01); D21H 21/20 (2006.01); D21H 23/28 (2006.01)
CPC (source: EP)
D21H 17/38 (2013.01); D21H 17/44 (2013.01); D21H 17/45 (2013.01); D21H 17/67 (2013.01); D21H 21/06 (2013.01); D21H 21/20 (2013.01); D21H 23/28 (2013.01)
Citation (search report)
See references of WO 2014029593A1
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2014029593 A1 20140227; BR 112015003272 A2 20170808; BR 112015003272 B1 20210720; CA 2881868 A1 20140227; CA 2881868 C 20201215; CN 104583493 A 20150429; CN 104583493 B 20190607; EP 2888404 A1 20150701; EP 2888404 B1 20180718; ES 2690592 T3 20181121; JP 2015531032 A 20151029; JP 6238986 B2 20171129; PL 2888404 T3 20181231
DOCDB simple family (application)
EP 2013066120 W 20130731; BR 112015003272 A 20130731; CA 2881868 A 20130731; CN 201380043577 A 20130731; EP 13745049 A 20130731; ES 13745049 T 20130731; JP 2015527832 A 20130731; PL 13745049 T 20130731