Production of stretched polymeric material having high strength

Details Production of stretched polymeric material having high strength Production of stretched polymeric material having high strength

1991-01-28

1993-04-13

Ziegler, Jacob

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642108, 2642905, 264291, 428167, B29C 4712, D01D 512

Patent

active

052020738

ABSTRACT:
A method for preparing a stretched polymeric material of high strength and high modulus which comprises shaping a dilute solution of a synthetic polymer having an average molecular weight of not less than 3.times.10.sup.5, followed by cooling to make a gel-like filament or film, and stretching the resultant gel-like filament or film at a high stretch ratio, characterized in that a solution or dispersion of (a) the gel-like globules of said synthetic polymer having the solvent occluded therein or (b) the fine powders of said synthetic polymer having an average particle weight of not more than 5.times.10.sup.-5 mg per particle in a solvent is used as or for preparation of said polymer solution to be shaped.

REFERENCES:
patent: 2327460 (1943-08-01), Rugeley
patent: 2721785 (1955-10-01), Zybert et al.

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