C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 5/18 (2006.01) B29C 55/08 (2006.01) B29C 55/14 (2006.01) B29D 7/01 (2006.01)
Patent
CA 2258122
The invention relates to a method for the production of cellulosed flat sheeting and cellulosed membranes in the form of flat membranes, wherein a solution of cellulose in an aqueous tertiary amino oxide is shaped out as sheeting by means of an extrusion die having an oblong extrusion gap, and then passed through an air gap into a regenerating bath, in which the cellulosed flat sheeting is formed. The method is characterized in that the cellulosed flat sheeting is stretched transversally after entry into the regenerating bath.
L'invention concerne un procédé de production de feuilles planes cellulosiques et de membranes cellulosiques sous forme de membranes planes, le dit procédé consistant à façonner sous forme de feuille une solution de cellulose dans un oxyde d'amine tertiaire aqueux, au moyen d'une filière d'extrusion présentant une fente d'extrusion allongée, puis à l'acheminer dans un bain de régénération à travers une fente d'aération, la feuille plane cellulosique étant formée dans ledit bain de régénération. Ledit procédé est caractérisé en ce que la feuille plane cellulosique est étirée transversalement après son introduction dans le bain de régénération.
Gspalti Peter
Kalleitner Johann
Riedl Gerold
Schlossnikl Christian
Schweigart Andreas
Lenzing Aktiengesellschaft
Sim & Mcburney
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