Process for the preparation of filaments of high tensile strengt

Details Process for the preparation of filaments of high tensile strengt Process for the preparation of filaments of high tensile strengt

1980-06-24

1983-12-27

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264203, 264205, 2642905, D01D 512

Patent

active

044229933

ABSTRACT:
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 molecular weight of at least 4.times.10.sup.5 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.times.10.sup.6 /M.sub.w)+1. The filaments are drawn at a temperature such that the modulus is at least 20 GPa.
The invention allows filaments to be prepared at high drawing rates, of 0.5 sec.sup.-1 or more, with a modulus of at least 20 GPa and a tensile strength of at least 1 GPa.

REFERENCES:
patent: 3048465 (1962-08-01), Jargeleit
patent: 3962205 (1976-06-01), Ward et al.
patent: 4137394 (1979-01-01), Meihuizen et al.
patent: 4228118 (1980-10-01), Wu et al.
patent: 4344908 (1982-08-01), Smith et al.

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