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. 27, 2025
Filed:
Dec. 03, 2020
Applicant:
Kuraray Co., Ltd., Kurashiki, JP;
Inventor:
Masato Warita, Okayama, JP;
Assignee:
KURARAY CO., LTD., Kurashiki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 27/40 (2006.01); B32B 5/02 (2006.01); B32B 7/12 (2006.01); B32B 27/04 (2006.01); B32B 27/08 (2006.01); B32B 27/12 (2006.01); B32B 27/18 (2006.01); C08G 18/08 (2006.01); C08G 18/79 (2006.01); C09J 175/08 (2006.01); D06N 3/00 (2006.01); D06N 3/14 (2006.01);
U.S. Cl.
CPC ...
D06N 3/14 (2013.01); B32B 5/022 (2013.01); B32B 7/12 (2013.01); B32B 27/12 (2013.01); B32B 27/40 (2013.01); C08G 18/0819 (2013.01); C08G 18/0866 (2013.01); C08G 18/797 (2013.01); C09J 175/08 (2013.01); D06N 3/0011 (2013.01); B32B 2250/03 (2013.01);
Abstract
A grain-finished leather-like sheet includes: a fiber base material; a polyurethane skin layer bonded to one surface of the fiber base material; and a polyurethane adhesion layer that bonds the fiber base material and the polyurethane skin layer to each other. The polyurethane adhesion layer includes an aqueous polyurethane as a main component and contains 0.01 to 0.45 mass % in sulfur atoms content, of a sulfate or an alkyl sulfate. The polyurethane adhesion layer exhibits coloration equivalent to pH 4.8 or less that is caused by a BCG (bromocresol green) solution.