The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 1994
Filed:
Aug. 25, 1993
Yasuo Muramoto, Hofu, JP;
Kiyoshi Yoshimoto, Hofu, JP;
Masami Fujimoto, Kudamatsu, JP;
Yoshiaki Morishige, Yamaguchi, JP;
Kanebo, Ltd., Tokyo, JP;
Abstract
A composite elastic filament with a rough surface, consisting of a sheath component composed of a fiber-forming thermoplastic polymer, such as polyamide, polyester or polyolefin, and a core component composed of a fiber-forming elastomer, such as polyurethane or polyester elastomer, wherein the core/sheath conjugate ratio ranges from 1/1 to 100/1 by cross-sectional area and the core portion has a smooth peripheral surface uniformly extending in the direction of the filament axis while the sheath portion covering the core portion has numerous ridges rising along the circumference of the filament and closely spaced along the length of the filament. This filament can be readily produced by the melt conjugate spinning of the core and sheath components at the above-specified conjugate ratio, followed by drawing 1.1- to 10.0-fold and relaxation. The filament has excellent elastic properties, a small surface friction coefficient and a matting effect due to diffuse reflection of light caused by the rough surface, and is agreeable when worn in the form of a textile structure, particularly as lady's stockings.