Asahi Kasei Kogyo Kabushiki Kaisha

Masakazu Takamura

Toshio Iwasa

Hitoshi Yoshida

Kunitoshi Shimizu

A porous hollow fiber polyvinylidene fluoride resin membrane, characterized in that the membrane has a unitary three-dimensional network structure entirely composed of a polyvinylidene fluoride resin and has an inside diameter of 1.5-5 mm and a wall thickness of 0.5-2 mm and in that the relationship between membrane bubble point and water flux per unit wall thickness is on or above the curve shown in FIG.

Porous polyvinylidene fluoride resin film and process for producing the same

An extremely fine acrylic polymer fiber pile fabric, which comprises a substratum fabric impregnated with an elastic polymer and having at least one pile layer formed by raising at least one surface of said fabric, is characterized in that said piles consist essentially of extremely fine independent acrylic polymer fibers, each of which has a denier of 0.8 or less and is provided with a number of amorphous scale-shaped protuberances formed on the peripheral surface thereof, and which has been produced by a wet spinning method from an acrylic polymer containing at least 80% by weight of acrylonitrile.

Growing community of inventors

Koube, Japan

Masakazu Takamura