Process for uniformly drawing polyethylene terephthalate filamen

Details Process for uniformly drawing polyethylene terephthalate filamen Process for uniformly drawing polyethylene terephthalate filamen

1972-09-11

1976-03-09

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

B29C 1702

Patent

active

039431380

ABSTRACT:
A process for uniformly drawing tows of poly(ethylene terephthalate) to produce high shrinkage fibres wherein the drawing is effected with the tow in a hot water saturated condition at a controlled birefringence, temperature and draw ratio. The product has initial shrinkages (as defined) of at least 5% and a high uniformity.

REFERENCES:
patent: 2468081 (1949-04-01), Koster
patent: 3077004 (1963-02-01), Mummery
patent: 3134833 (1964-05-01), Ciporin et al.
patent: 3259681 (1966-07-01), Bull et al.
patent: 3444681 (1969-05-01), Reese
patent: 3527862 (1970-09-01), Shimosako
patent: 3557273 (1971-01-01), Bergwerk

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