Process of producing high tenacity, high modulus crystalline...

Details Process of producing high tenacity, high modulus crystalline... Process of producing high tenacity, high modulus crystalline...

D - Textiles, Paper

01

F

18/627

D01F 6/04 (2006.01) D01F 6/02 (2006.01)

Patent

CA 1174818

ABSTRACT PROUDCING HIGH TENACITY, HIGH MODULUS CRYSTALLINE THERMOPLASTIC ARTICLE SUCH AS FIBER OR FILM Solutions of ultrahigh molecular weigh poly- mers such as polyethylene in a relatively non-volatile solvent are extruded through an aperture at constant concentration through the aperture and cooled to form a first gel of indefinite length. 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 xero- gel. The first gel, second gel or xerogel, or a combination, are stretched. Among the products obtain- able are polyethylene fibers of greater than 30 or even 40 g/denier tenacity and of modulus greater than 1000 or even 1600 or 2000 g/denier.

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