Wenderoth, Lind & Ponack
Vinylidene fluoride resin fiber and process for producing the same
 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. 
Kureha Kagaku Kogyo Kabushiki Kaisha
Y G Y D
Y10T G10D Y10T D01F
additional inventional additional inventional
Toshiya Naohiro
Mizuno Murayama