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:
Oct. 01, 2002
Filed:
Sep. 16, 1999
Michio Asano, Settsu, JP;
Masayuki Tsuji, Settsu, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
To provide a PTFE granular powder containing no filler which has a large apparent density, a small average particle size, a narrow particle size distribution, a small electrostatic charge, a small angle of repose and an excellent powder flowability, and a process for preparing the same. The granular powder is prepared by granulation of a PTFE powder in water with stirring in the presence of an organic liquid forming liquid-liquid interface with water and a nonionic and/or anionic surfactant. A molded article obtained from the granular powder is excellent in tensile strength and elongation and has a small surface roughness, a high electrostatic charge and a high whiteness (Z value).