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:
Jul. 27, 1999
Filed:
Oct. 30, 1991
Susumu Norota, Ibaraki, JP;
Tadao Komoriya, Ibaraki, JP;
Mitsuo Kuwabara, Ibaraki, JP;
Akira Kobayashi, Takatsuki, JP;
Hiroyuki Adachi, Ibaraki, JP;
Teijin Limited, Osaka, JP;
Abstract
A shaped wholly aromatic polyamide resin composition article having an excellent mechanical strength, stain-proof property and antistatic property, and comprising a wholly aromatic polyamide resin matrix and a dispersoid comprising polytetrafluoroethylene resin particles in the form of fine networks of fibrils and, optionally, additional inorganic particles, dispersed in the matrix, is produced by mixing an aqueous dispersion of PTFE particles having an average size of 0.3 to 3 .mu.m in an amount of 0.01% to 10% based on the total weight of the shaped article, with wholly aromatic polyamide particles having a melting point of at least 50.degree. C. higher than that of PTFE and composed of porous secondary particles having an average size of 30 to 200 .mu.m and consisting of primary particles having an average size of 0.1 to 2.0 .mu.m; drying the mixture to provide composite particles composed of aromatic polyamide cores and PTFE coating layers on the cores; and shaping a feed powder comprising the composite particles at a temperature not lower than the glass-transition point but not lower than the melting point or heat decomposition point of the aromatic polyamide, under a pressure.