Griffin Branigan & Butler
Filler materials for spiral gaskets
 A filler material for spiral gaskets has: 36.5 weight percent or more fibrous material, composed of 5 to 20 weight percent ceramic fibers, 13.5 to 25 weight percent sepiolite and 1 to 10 weight percent organic fibers; 59 weight percent or less inorganic powder; and 1 to 10 weight percent organic polymeric binder. The filler material of the present invention may be used as a substitute for conventional asbestos filler material in spiral gaskets and is superior to asbestos filler material in heat resistance. 
Nippon Pillar Packing Co. Ltd.
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Akira Masahiko Takeshi
Hashimoto Takaoka Miyoshi