EP 2593603 A1 20130522 - CELLULOSIC FIBRE COMPOSITION
Title (en)
CELLULOSIC FIBRE COMPOSITION
Title (de)
CELLULOSEFASERZUSAMMENSETZUNG
Title (fr)
COMPOSITION DE FIBRE CELLULOSIQUE
Publication
Application
Priority
- US 36375710 P 20100713
- US 36375110 P 20100713
- US 36374910 P 20100713
- US 36372810 P 20100713
- EP 10169299 A 20100712
- EP 10169295 A 20100712
- EP 10169287 A 20100712
- EP 10169283 A 20100712
- EP 2011061571 W 20110708
- EP 11730021 A 20110708
Abstract (en)
[origin: WO2012007363A1] The invention relates to a composition comprising cellulosic fibres having an average degree of substitution of anionic groups of from 0.001 to 0.25, and ° a length weighted mean fibre length up to 1,100 µm and a length weighted mean fibre width over 10 µm, or ° a length weighted mean fibre length up to 1,100 µm, and wherein at least 50 % by weight of the cellulosic material is insoluble in water, or ° a length weighted mean fibre length / width ratio up to 30, or ° a length weighted mean fibre width over 35 µm. The invention also relates to a composition comprising cellulosic fibres having a specific surface area of at least 1.5 m2/g, a length weighted mean fibre length / width ratio up to 30, and a dry solids content of at least 5 % by weight, based on the weight of the composition, or up to 30 % by weight, based on the total weight of the cellulosic fibres, of cellulosic fibres with a length weighted mean fibre length up to 100 µm. Method of producing a composition comprising cellulosic fibres which comprises subjecting cellulosic fibres to chemical treatment and mechanical treatment, wherein the chemical treatment comprises treating cellulosic fibres with (i) at least one agent containing a carboxyl group, optionally substituted, (ii) at least one oxidant and at least one transition metal, or (iii) at least one nitroxyl radical, and the mechanical treatment comprises subjecting cellulosic fibres to extrusion with a twin-screw extruder or a planetary roller extruder. The invention also relates to a method of producing a composition comprising cellulosic fibres which comprises subjecting cellulosic fibres having an average degree of substitution of anionic groups of from 0.001 to 0.25 to extrusion. The invention also relates to a composition comprising cellulosic fibres obtainable by the methods, a process for producing a cellulosic pulp mixture which comprises mixing the composition with cellulosic pulp, a cellulosic pulp mixture obtainable by the process, and the use of the composition and cellulosic pulp mixture as an additive in the production of paper and board, processes for producing paper and board in which the composition or cellulosic pulp mixture is used, paper and board obtainable by the processes, and various uses of the paper and board.
IPC 8 full level
D21H 11/18 (2006.01); B29C 48/40 (2019.01); B29C 48/44 (2019.01); B29C 48/535 (2019.01); B29C 48/54 (2019.01); B29C 48/56 (2019.01); B29C 48/57 (2019.01); D21H 15/00 (2006.01); D21H 15/02 (2006.01); D21H 15/06 (2006.01)
CPC (source: EP KR)
B29C 48/40 (2019.01 - EP); B29C 48/44 (2019.01 - EP); B29C 48/535 (2019.01 - EP); B29C 48/54 (2019.01 - EP); B29C 48/56 (2019.01 - EP); B29C 48/57 (2019.01 - EP); D21H 5/008 (2013.01 - KR); D21H 5/1236 (2013.01 - KR); D21H 5/1245 (2013.01 - KR); D21H 5/1263 (2013.01 - KR); D21H 11/20 (2013.01 - EP); B27N 3/00 (2013.01 - EP); D21H 11/18 (2013.01 - EP); D21H 15/02 (2013.01 - EP); D21H 27/10 (2013.01 - EP)
Citation (search report)
See references of WO 2012007363A1
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)
WO 2012007363 A1 20120119; AU 2011278462 A1 20130110; BR 112013000141 A2 20160524; CA 2803650 A1 20120119; CN 102971462 A 20130313; EP 2593603 A1 20130522; JP 2013531749 A 20130808; KR 20130132381 A 20131204; TW 201213421 A 20120401
DOCDB simple family (application)
EP 2011061571 W 20110708; AU 2011278462 A 20110708; BR 112013000141 A 20110708; CA 2803650 A 20110708; CN 201180033282 A 20110708; EP 11730021 A 20110708; JP 2013519038 A 20110708; KR 20137001576 A 20110708; TW 100124494 A 20110711