D - Textiles – Paper – 01 – F
Patent
D - Textiles, Paper
01
F
18/601, 18/763
D01F 6/04 (2006.01) B29C 47/00 (2006.01) D01D 5/00 (2006.01) D07B 1/02 (2006.01)
Patent
CA 1276064
SHAPED POLYETHYLENE ARTICLES OF INTERMEDIATE MOLECULAR WEIGHT AND HIGH MODULUS ABSTRACT Solutions of intermediate molecular weight polymers from about 200,000 to about 4,000,000, such as polyethy- lene, in a relatively non-volatile solvent are extruded through an aperature at constant concentration and thereafter stretched at a ratio of at least about 3:1 prior to cooling to form a first gel. The first gels are extracted with a volatile solvent to form a second gel, and the second gel is dried to form a low porosity xerogel. Stretching occurs with any one or more of the first gel, second gel or xerogel. The polyethylene products produced by our process include products having a molecular weight between about 200,000 and about 4,000,000 a tenacity of at least about 13 grams/denier, a modulus of at least about 350 gram/denier, a porosity of less than 10% by volume, a crystalline orientation function of at least about 0.95, and a main melting temperature of at least about 140°C.
499202
Kavesh Sheldon
Prevorsek Dusan Ciril
Alliedsignal Inc.
Gowling Lafleur Henderson Llp
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