Filaments of high tensile strength and modulus and process...

Details Filaments of high tensile strength and modulus and process... Filaments of high tensile strength and modulus and process...

D - Textiles, Paper

01

F

18/612

D01F 6/04 (2006.01) B29C 70/10 (2006.01)

Patent

CA 1147518

A B S T R A C T The invention relates to the preparation of filaments with a high tensile strength and a high modulus and to the filaments thus prepared. A solution of a linear polyethylene with a weight-average mole- cular weight of at least 4 x 105 is spun and the filaments, from which the solvent may have been removed in whole or in part, are drawn using a draw ratio of at least (12 x 106/?w) + 1. The filaments are drawn at a tem- perature such that the modulus is at least 20 GPa. The invention allows filaments to be prepared at high drawing rates, of 0.5 sec-1 or more, with a modulus of at least 20 GPa and a ten- sile strength of at least 1 GPa.

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