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. 22, 2009
Filed:
Jan. 29, 2004
Keiji Takeda, Numazu, JP;
Gen Koide, Mishima, JP;
Keiji Takeda, Numazu, JP;
Gen Koide, Mishima, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
This invention provides a moisture-permeable, waterproof film characterized in that it consists of two or more resin layers comprising, as polymerizing components, bishidroxyalkyl aliphatic acid and alkyleneglycol, said bishydroxyalkyl aliphatic acid content is 0.08 mmol/g to 0.5 mmol/g, at least a part of said alykyleneglycol is polyethylene glycol contained in an amount of 40 wt % to 80 wt % based on said solid resin, and a moisture permeability by JIS L-1099 'Potassium Acetate Method' (B-1 method) at average film thickness of 20 micrometers being not less than 3×10g/m·24 h and not more than 200×10g/m·24 h, and a moisture-permeable waterproof composite material to which said moisture-permeable, waterproof film is provided at least on one surface of a substrate material and its moisture permeability by JIS L-1099 'Potassium Acetate Method' (B-1 method) being not less than 1×10g/m·24 h and not more than 50×10g/m·24 h. This invention makes use of a polymer having excellent moisture permeability, waterproofness durability and capability of being made aqueous, and accordingly, this invention provides a moisture-permeable, waterproof film and a composite material which can be manufactured by an ecological process.