Vinylidene fluoride resin fiber and process for producing the sa

Details Vinylidene fluoride resin fiber and process for producing the sa Vinylidene fluoride resin fiber and process for producing the sa

1984-07-23

1985-10-08

McCamish, Marion E.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

428364, 428421, C08F 1418, D02G 300, B32B 2700

Patent

active

045461589

ABSTRACT:
A vinylidene fluoride resin fiber having an increased tensile strength is obtained by spinning by melt-extrusion of a vinylidene fluoride resin having a large polymerization degree under the conditions of a small extrusion rate and a large draft ratio into a small diameter of spun fiber. The thus obtained fiber is characterized by having no crystal melting point based on the vinylidene fluoride chains at a temperature below 178.degree. C., and having a mean crystal length in the molecular chain direction of 200 A or longer and a birefringence of 30.times.10.sup.-3 or larger.

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.
patent: 4052550 (1977-10-01), Chion et al.

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