EP 2710054 A1 20140326 - PROCESS FOR PROCESSING CELLULOSE FILMS OR SHAPED ARTICLES
Title (en)
PROCESS FOR PROCESSING CELLULOSE FILMS OR SHAPED ARTICLES
Title (de)
VERFAHREN ZUR VERARBEITUNG VON FOLIEN ODER FORMARTIKELN AUS CELLULOSE
Title (fr)
PROCÉDÉ DE TRAITEMENT DE PELLICULES OU D'ARTICLES FAÇONNÉS CELLULOSIQUES
Publication
Application
Priority
- GB 201108532 A 20110520
- GB 201108528 A 20110520
- GB 2012051139 W 20120518
Abstract (en)
[origin: WO2012160362A1] The present invention provides a process for producing cellulose film or cellulose shaped articles comprising the steps of steeping a non-dissolving cellulose- containing pulp in a basic liquid, xanthating the steeped cellulose-containing pulp with carbon disulphide, dissolving the xanthated cellulose-containing pulp in a basic liquid to form a viscose solution, and casting a cellulose film or cellulose shaped article from the viscose solution, wherein one or more of the following optimised processing conditions are employed: steeping is carried out, at least partially, at a temperature of about 30°C to about 50°C, steeping is carried out in a basic liquid having a concentration of base of about 16 to about 18% by weight, xanthation is carried out using about 30 to about 40% carbon disulphide by weight of cellulose present, xanthation is carried out, at least partially, at a temperature of about 20°C to about 30°C, dissolution is carried out, at least partially, at a temperature of about 10°C to about 25°C, dissolution results in a viscose solution having a base concentration of between about 5.5 and 7,5% by weight of the solution, and / or dissolution results in a viscose solution having a cellulose concentration of between about 8.5 and about 9.5% by weight of the solution.
IPC 8 full level
C08J 5/00 (2006.01); C08J 5/02 (2006.01); C08J 5/18 (2006.01)
CPC (source: EP)
C08J 5/00 (2013.01); C08J 5/02 (2013.01); C08J 5/18 (2013.01); C08J 2301/02 (2013.01); C08J 2301/22 (2013.01); C08J 2301/24 (2013.01)
Citation (search report)
See references of WO 2012160362A1
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 2012160362 A1 20121129; CN 103562277 A 20140205; EP 2710054 A1 20140326; JP 2014517109 A 20140717; JP 6022554 B2 20161109
DOCDB simple family (application)
GB 2012051139 W 20120518; CN 201280024609 A 20120518; EP 12722823 A 20120518; JP 2014510890 A 20120518