Mitsubishi Rayon Company, Limited

Fujio Itani

Munehiro Okumura

Hiroshi Sato

Ikuo Takiguchi

Masayuki Igawa

Syoji Imao

Shiro Asada

Shouji Fujii

Masahiko Miyanoki

Toshi Yoshihara

Yoshiaki Taniyama

Tsutomu Kakuda

Takeshi Uotani

Hiroshi Nakatui

Moldings and method for forming the same

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

An inorganic substance composition comprising at least 50% by weight of a finely divided inorganic substance and 2 to 50% by weight of a fiber forming organic polymeric material and having a specific surface area of more than 2 m.sup.2 /g is described. The composition is prepared by preparing a liquid suspension from the inorganic substance, the organic polymeric material and a solvent; heating the liquid suspension to at least 100.degree. C to dissolve the organic polymeric material in the solvent; and then extruding the heated liquid suspension at a pressure equal to or higher than the vapor pressure of the solvent through an orifice into a zone of a lower pressure to evaporate the solvent.

Inorganic substance composition and process for producing same

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Toyohashi, Japan

Fujio Itani