Mitsubishi Rayon Company, Limited

Toshi Yoshihara

Munehiro Okumura

Masayuki Igawa

Fujio Itani

Syoji Imao

Masahiko Miyanoki

Yoshiaki Taniyama

Takeshi Uotani

Flake- or sliver-like porous structures of a polymeric material heavily loaded with a finely divided inorganic substance are prepared by spurting a mixture of the polymeric and finely divided inorganic components in a solvent. The products have many fine, irregular voids. The thickness of walls forming such voids is 5.mu. or less. The products are especially useful for producing sheet-like structures therefrom by beating and/or refining them followed by general paper making procedures. The sheets, when calendered, have a high initial modulus and improved dimensional stability.

Flake- or sliver-like porous structure of polymeric material and process

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Otake, Japan

Toshi Yoshihara