Process for the production of polymer filaments having high...

Details Process for the production of polymer filaments having high... Process for the production of polymer filaments having high...

D - Textiles, Paper

01

D

18/612

D01D 5/04 (2006.01) D01F 6/04 (2006.01)

Patent

CA 1191008

PROCESS FOR THE PRODUCTION OF POLYMER FILAMENTS HAVING HIGH TENSILE STRENGTH ABSTRACT OF THE DISCLOSURE An improved process for the preparation of polymer filaments having a high tensile strength and modulus by spinning a solution of high-molecular weight polymer and thereafter stretching the filament thus formed. A solution of an ethylene polymer or copolymer, containing at least 80 percent by weight solvent, is spun at a temperature above the gel point of the solution. The ethylene polymer or copolymer contains at most about 5 percent by weight of an alkene having 3 to 8 carbon atoms, has a weight-average molecular weight Mw higher than 4 x 105 kg/kmole, and has a weight/number average molecular weight ratio Mw/Mn lower than 5. The spun polymer solution, is thereafter cooled to a temperature below its gel point to form a gel filament, which gel filament is thereafter strenght to form a polymer filament having a tensile strength of at least about 1.5 GPa at room temperature.

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