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:
May. 21, 2013
Filed:
Sep. 28, 2006
Kimio Nakayama, Okayama, JP;
Tsuyoshi Yamasaki, Okayama, JP;
Nobuo Takaoka, Okayama, JP;
Jiro Tanaka, Okayama, JP;
Kimio Nakayama, Okayama, JP;
Tsuyoshi Yamasaki, Okayama, JP;
Nobuo Takaoka, Okayama, JP;
Jiro Tanaka, Okayama, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
A leather-like sheet composed of a microfine-fiber entangled body made of bundles of microfine fibers and an elastic polymer impregnated therein. The bundles of microfine fibers are composed of microfine monofibers having an average cross-sectional area of 0.1 to 30 μmand have an average cross-sectional area of 40 to 400 μm. The bundles of microfine fibers exist in a density of 600 to 4000/mmon a cross section taken along the thickness direction of the microfine-fiber entangled body. The elastic polymer contains 30 to 100% by mass of a polymer of ethylenically unsaturated monomer. The polymer of ethylenically unsaturated monomer is composed of a soft component having a glass transition temperature (Tg) of less than −5° C., a crosslinkable component, and optionally a hard component having a glass transition temperature (Tg) of higher than 50° C. and another component. The polymer of ethylenically unsaturated monomer is bonded to the microfine fibers in the bundles of microfine fibers. The leather-like sheet has a flexibility and hand such as dense feeling each resembling natural leathers and a high quality appearance. The leather-like sheet is highly stable in quality such as fastness and surface abrasion resistance and excellent in practical performance.