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. 14, 2013
Filed:
Aug. 16, 2012
Takashi Wano, Osaka, JP;
Yozo Nagai, Osaka, JP;
Yuri Horie, Osaka, JP;
Atsushi Tanaka, Osaka, JP;
Osamu Tabei, Osaka, JP;
Takashi Wano, Osaka, JP;
Yozo Nagai, Osaka, JP;
Yuri Horie, Osaka, JP;
Atsushi Tanaka, Osaka, JP;
Osamu Tabei, Osaka, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
Disclosed is a process for production of a polytetrafluoroethylene (PTFE) sheet, which is superior in productivity compared to conventional processes and can reduce the cost of production. Also disclosed is a process for production of a PTFE seal tape. The processes comprise the following steps (i) to (iii): (i) applying a force to a PTFE particle suspension comprising PTFE particles, a surfactant and water (a dispersion medium) so that the particles can come close to each other or contact with each other, thereby forming a PTFE-containing solid material having the water and the surfactant included therein; (ii) shaping the solid material into a sheet-like form; and (iii) reducing the water content in the sheet-like solid material.