Kanegafuchi Kagaku Kogyo Kabushiki Kaisha

Shouichi Murata

Muneto Makiyama

Taizo Yasumoto

Kazuya Kusunoki

Yoshinori Shibukawa

Takahiro Omoto

Disclosed is a foamed synthetic fiber characterized in that an organic solvent solution of a thermoplastic polymer admixed with 3-100 weight percent of a compound scarcely soluble or insoluble in the aqueous coagulating bath for wet spinning, which is liquid under normal pressure and has a boiling point of 120.degree. C. or less, as foaming agent is injected as spinning dope into said aqueous coagulating bath and it is foamed in a drying atmosphere at the boiling point or more of the foaming agent and 100.degree. C. or more and has an expansion ratio of 3 percent or more, and the manufacturing method thereof. The foamed synthetic fiber of the present invention is light and bulky, being excellent in warmth-keeping and heat-insulating performance with its appearance, touch and development of color similar to those of an animal hair.

Foamed synthetic fiber and its manufacturing method

A pile composition comprising as pile fibers 20 to 98% by weight of shrinkable fibers which are at least 15% in shrinkage and up to 0.230 in coefficient of static friction between the fibers. The pile obtained is outstanding in appearance, hand and draping property.

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Takasago, Japan

Shouichi Murata