Poly(vinylidene fluoride) yarns and fibers

Details Poly(vinylidene fluoride) yarns and fibers Poly(vinylidene fluoride) yarns and fibers

1976-01-29

1977-10-04

Wong, Jr., Harry

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 304R, 260 326R, C08F 1422, C08F11422

Patent

active

040525503

ABSTRACT:
A process of making polyvinylidene fluoride yarns and fibers of homogeneous structure and good dry strength includes the steps of spinning the solution of the polymer into a coagulating bath containing 45 to 60% by weight aprotic polar organic solvent and 40 to 55% by weight water, stretching the filaments in air to a ratio of 1.5 to 5x and then in boiling water to a ratio of 1.5 to 4x (overall stretching ratio of 3x to 6.5x) and then washing in water at room temperature.

REFERENCES:
patent: 3553185 (1971-01-01), Amagi et al.
patent: 3707592 (1972-12-01), Ishii et al.
patent: 3925339 (1975-12-01), Ishii et al.

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