Process for the production of cellulosic moulded bodies
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United States of America Patent
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Sep 14, 2004
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N/A
app pub date -
May 23, 2001
filing date -
Apr 25, 1997
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Abstract
The invention relates to a process for the manufacture of cellulosic flat films and cellulosic membranes in the form of flat membranes whereby a solution of cellulose in an aqueous tertiary amine oxide is moulded in film form using an extrusion nozzle which has an oblong extrusion gap and is led into a precipitation bath via an air gap whereby the cellulosic flat film is formed in the precipitation bath, characterized in that the cellulosic flat film is stretched in the transverse direction after entering the precipitation bath.
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