Shima Seiki Mfg., Ltd.

Spiber Inc.

Toyo Feather Industry Co., Ltd.

Shozo Torigoe

Akihiko Ozeki

Seiji Shimoda

Yoshihiro Yamashita

Seiji Kenjo

Mitsuhiro Shima

Yuichi Tsuda

An object of the present invention is to provide a method for producing protein spinning capable of securing a stable strength by securing sufficient interlacing between fibers. The method for producing a protein spun yarn of the present invention includes a step (a) of preparing a raw material spun yarn including an uncrimped artificial fibroin fiber containing modified fibroin and a step (b) of bringing the raw material spun yarn into contact with an aqueous medium to crimp the artificial fibroin fiber.

Protein spun yarn manufacturing method

A protein fiber having a crimp property, such that the protein fiber crimps in response to a stimulus, is immersed in a solution of protein having a different composition from the protein fiber. The protein fiber treated with the different protein composition is infiltrated into the protein and the protein fiber is made to crimp.

Protein fiber crimping method, protein fiber production method, protein fibers, spun yarn, and textile product

A protein surface layer is formed on a surface of a base fiber comprising a natural protein fiber including silk or a synthetic protein fiber including Chinon. The protein surface layer is divided in a plurality of particles by cracks. The resultant fibers with the protein surface layer divided in particles by cracks affords bulky textile products with an improved texture.

Surface-processed fiber, method for manufacturing same, thread, and fiber product

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Wakayama, Japan

Shozo Torigoe