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:
Dec. 18, 2007
Filed:
Jul. 15, 2002
Kazuhiro Sasaki, Okayama, JP;
Kazuhiro Sasaki, Okayama, JP;
Japan Exlan Company Limited, Osaka, JP;
Abstract
A fibrous base material giving a wet frictional material used for clutch, differential gear, brake, etc. of cars, industrial machines, etc. having an excellent durability where plastic deformation of fiber and deterioration by acidic decomposition products of lubricant additives do not take place is provided. A fibrous base material for wet frictional materials which comprises a fiber component, a friction adjusting material and a filler, said fiber component containing 5 to 50% by weight of a homoacrylonitrile fiber where modulus of elasticity at 180° C. is not less than 10 cN/dtex and shrinking rate at 200° C. is within 5% and/or a homoacrylonitrile fiber in a pulp form prepared by fibrillation of said homoacrylonitrile fiber.