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:
Jun. 17, 2008
Filed:
Aug. 01, 2002
Tetsuo Shimizu, Settsu, JP;
Michio Asano, Settsu, JP;
Makoto Ono, Settsu, JP;
Yoshinori Nanba, Settsu, JP;
Shunji Kasai, Settsu, JP;
Shinichi Yano, Settsu, JP;
Hiroyuki Yoshimoto, Settsu, JP;
Tetsuo Shimizu, Settsu, JP;
Michio Asano, Settsu, JP;
Makoto Ono, Settsu, JP;
Yoshinori Nanba, Settsu, JP;
Shunji Kasai, Settsu, JP;
Shinichi Yano, Settsu, JP;
Hiroyuki Yoshimoto, Settsu, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
The present invention provides a polytetrafluoroethylene molded article, particularly a PTFE molded article for high-frequency insulation, which is excellent in various electric properties and mechanical properties in a high frequency range of 3 to 30 GHz. The present invention also provides PTFE fine powder, which is excellent in extrusion moldability and capable of providing the molded article, and a process for preparing the same. More specifically, the present invention relates to a polytetrafluoroethylene fine powder having a standard specific gravity of 2.180 to 2.225, which is obtained by contacting polytetrafluoroethylene fine powder having a standard specific gravity of 2.180 to 2.225 with a fluorine radical source, wherein tanδ at 12 GHz of a film comprising the powder, which is obtained by cooling at 5 to 50° C./second after baking, is at most 2.0×10.