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:
Aug. 05, 1986
Filed:
Aug. 23, 1985
Toray Industries, Inc., Tokyo, JP;
Abstract
Improved ultrafine sheath-core composite fibers and composite sheets composed of these fibers are disclosed. The composite fibers have a fineness of 0.0001 to 0.5 denier and comprises 10 to 70% of the core having a very high intrinsic viscosity within a specific range and being located at the center of the sheath and 90 to 30% of the sheath composed of a polyester copolymerized 1.5 to 8 mole %, based on the total acid component, of 5-sodium (or lithium or potassium) sulfoisophthalate and having a thickness of 0.04 to 2 microns. The composite fibers have a high strength and are dyeable with a cationic dye. When the composite fibers are combined with an elastic material such as polyurethane, suede-like artificial leathers having excellent softness, touch, feel and color can be obtained.