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:
Apr. 26, 2011
Filed:
Dec. 13, 2006
Michinori Fujisawa, Okayama, JP;
Jiro Tanaka, Okayama, JP;
Tsuyoshi Yamasaki, Okayama, JP;
Norio Makiyama, Okayama, JP;
Yoshiyuki Ando, Okayama, JP;
Michinori Fujisawa, Okayama, JP;
Jiro Tanaka, Okayama, JP;
Tsuyoshi Yamasaki, Okayama, JP;
Norio Makiyama, Okayama, JP;
Yoshiyuki Ando, Okayama, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
A substrate for artificial leathers, comprising a nonwoven fabric body made of microfine fiber bundles and an elastic polymer impregnated therein. The substrate for artificial leathers simultaneously satisfies the following requirements 1 to 4: (1) each of the microfine fiber bundles contains 6 to 150 bundled microfine long fibers in average; (2) a cross-sectional area of the microfine long fibers constituting the microfine fiber bundles is 27 μmor less, and 80% or more of the microfine long fibers has a cross-sectional area of from 0.9 to 25 μm; (3) an average cross-sectional area of the microfine fiber bundles is from 15 to 150 μm; and (4) on a cross section parallel to a thickness direction of the nonwoven fabric body, cross sections of the microfine fiber bundles exist in a density of from 1000 to 3000/mmin average. The raised artificial leathers and grain-finished artificial leathers made from the substrate for artificial leathers are excellent in the properties which are hitherto difficult to be combined.