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:
Sep. 17, 2002
Filed:
Sep. 16, 1999
Michio Asano, Settsu, JP;
Masamichi Sukegawa, Settsu, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
Filler-containing polytetrafluoroethylene granular powder, which has a large apparent density, a small average particle size, a narrow particle size distribution, a superior powder flowability, a small electrostatic charge and gives a molded product having a superior tensile strength and elongation a high degree of whiteness and a low surface roughness, and a process for preparing the same. The granulation is carried out by stirring, in water, of a PTFE powder and a filler in the presence of an organic liquid forming liquid-liquid interface with water and an anionic surfactant and/or nonionic surfactant such as a segmented polyalkylene glycol having a hydrophobic segment and hydrophilic segment and deagglomerating of the powder.