D - Textiles – Paper – 01 – F
Patent
D - Textiles, Paper
01
F
18/590, 18/792
D01F 2/00 (2006.01) C08J 3/09 (2006.01)
Patent
CA 1141913
Abstract of the Disclosure A solution containing cellulose dissolved in a tertiary amine N-oxide solvent containing a nonsolvent for cellulose such as water is shaped by extrusion or other shaping process to form A shaped cellulose fiber, rod, plate, tubing or film. The extruded shaped article is stretched in air while still a solution to im- part improved physical properties thereto and the cellulose is precipitated from the shaped solution to set the properties with- out additional drawing. The solution may be prepared by dissolv- ing cellulose in the tertiary amine N-oxide solvent in the barrel of an extrusion apparatus, extruding the solution, orienting by stretching the resulting product in air while still a solution and then precipitating the cellulose from the shaped article before significant degradation of the cellulose. The cellulose and ter- tiary amine N-oxide may be ground to substantially the same parti- cle size before charging the extruder barrel. The tertiary amine N-oxide is recovered and recycled to avoid environmental pollution problems. The resulting cellulose fibers or films can be used to make fabrics, wrapping or packaging materials or non-woven pro- ducts.
325133
Akzona Incorporated
Borden Ladner Gervais Llp
LandOfFree
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