Asahi Glass Company, Limited

Shigeru Iseki

Mituharu Morozumi

Shoji Atsuta

Masataka Arai

Finely ground polytetrafluoroethylene molding powder with or without a filler is subjected to high speed agitation in the presence of a medium consisting essentially of water and a hydrophobic organic liquid at a ratio of 0.5 to 1 liter per 1 Kg of the resin to agglomerate it. Hydrophobic organic liquids mean organic liquid which dissolve less than 15 wt. % in water at the temperature of agglomeration. The volumetric ratio of the organic liquid to water is in a range of 2 to 1/2. The agglomerated product having narrow particle size distribution and high bulk density and free flowing property can be obtained by the agitation for short time.

Method of agglomerating polytetrafluoroethylene powder

A fluorocarbon polymer composite comprises a fluorocarbon polymer and a filler in a form of powder, granules, beads, fiber, fabric sheet or a like which is treated with polyphenylene sulfide.

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Tokyo, Japan

Shigeru Iseki