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:
Sep. 08, 2009
Filed:
Mar. 29, 2005
Yoshikazu Yakake, Omihachiman, JP;
Masaru Ueno, Anpachi-gun, JP;
Makoto Nishimura, Otsu, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
A sheet comprising a non-woven fabric in which ultra-fine fibers of a single fiber thickness of 0.5 dtex or less are entangled and an elastomeric binder mainly composed of a polyurethane, wherein the polyurethane is a polycarbonate-based polyurethane having a polycarbonate skeleton represented by both of the following general formulas (1) and (2), and having a gelation point of 2.5 ml or more and less than 6 ml. Rand Rare aliphatic hydrocarbon groups with 7 to 11 carbons, and they may be same or different, n and m are positive integers, and when Rand Rare different, it is a block copolymer or a random copolymer. Rand Rare aliphatic hydrocarbon groups with 3 to 6 carbons, and they may be same or different, x and y are positive integers, and when Rand Rare different, it is a block copolymer or a random copolymer.