Kanebo, Limited

Yasushi Nakai

Yukio Yamakawa

Kiyoshi Yoshimoto

Soichiro Tanaka

Shigeru Tokutomi

Koji Itonaga

Teruyoshi Kawata

A polyamide/polyurethane composite filament yarn, contains a filament having a polyamide sheath component and a polyurethane eccentric core component exposed, through a neck portion of uniform width, on the surface of the filament. The filament is manufactured by a process comprising inserting, immediately before extruding from a spinneret orifice, a molten polyurethane flow, at an oblique angle from above, into a molten polyamide flow flowing down in a conduit, so that a small part of the polyurethane flow radially projects in a restricted width through the thinnest portion of the polyamide flowing flows down the inner wall of the conduit. For this process, an employable spinneret comprises a leading duct for a polyamide connected to an orifice via a vertical conduit, another leading duct for a polyurethane connected to an injection pipe obliquely extending therefrom, protruding into said conduit, opening immediately before said orifice and having a slit extending longitudinally at its under side along its entire protruded length.

Composite filament yarn and process and spinneret for manufacturing the same

Elastic polyurethane yarn and method of manufacturing the same

Growing community of inventors

Hofu, Japan

Yasushi Nakai