Ube Industries, Inc.

Iwatani & Co., Ltd.

Lec, Inc.

Toyo Roshi Kaisha Ltd.

Eiichi Kamei

Yasushi Shimomura

Mitsuo Yamanaka

Tadashi Ogawa

Hidetomo Ashitaka

Yukihiko Asano

Yutaka Matsudomi

Toru Takahashi

Yasuo Kanda

Kiyoshi Tsuruzawa

In a resin composite, polyolefine grains are dispersed in a polyamide matrix. Each of the polyolefine grains has a core made of an unmodified polyolefine and a shell made of another polyolefine that is modified. In one embodiment, the core is made of a crystalline polypropylene resin (C), and the shell is made of modified copolymer (B) having ethylene units and .alpha.-olefine units. The modified copolymer (B) may have the .alpha.-olefine units as a major component. The resin composite has 30 to 80 percents by weight of polyamide (A), 1 to 30 percents by weight of the modified copolymer (B), and 19 to 69 percents by weight of the crystalline polypropylene resin (C) wherein the sum of the polyamide, the modified copolymer, and the crystalline propylene resin is 100 percents by weight. In another embodiment, the core is made of an unmodified copolymer (E) having ethylene units and .alpha.-olefine units, and the shell is made of a modified crystalline polypropylene resin (D). The copolymer may have the ethylene units as a major component. The resin composite has 30 to 80 percents by weight of the polyamide (A), 5 to 50 percents by weight of the modified crystalline polypropylene resin (D), and 5 to 65 percents by weight of the copolymer (E) wherein the sum of the polyamide, the modified crystalline polypropylene resin, and the copolymer is 100 percents by weight. The unmodified crystalline polypropylene resin (C) is modified with at least one of .alpha.,.beta.-unsaturated caboxylic acid and .alpha.,.beta.-unsaturated caboxylate to give the modified crystalline polypropylene resin (D). The resin composite has both the properties possessed by polyamide and the properties possessed by polyolefine in good balance, and further has properties that are not sufficiently possessed by the polyamide or polyolefine, specifically, low warpage upon molding, good dimensional stability and good impact resistance.

Resin composite containing polyamide matrix and polyolefine grains

A process of producing a porous polypropylene hollow fiber or film which comprises a step for forming a large number of micropores in the surrounding wall of said fiber or in said film by drawing a polypropylene hollow fiber or film, which is characterized in that the drawing process is performed at a temperature in the range of 110.degree.-155.degree. C. and at a drawing rate of less than 10%/min.

Process of producing porous polypropylene hollow fiber and film

This microporous film has an approximately uniform configuration in which the intervals between slender fibrils extend approximately two-dimensionally which are connected to each other between adjacent unstretched planar flat portions to define fine through-pores, and the distribution of pore size is sharp and the porosity is high. Accordingly, the microporous film excels in water filtration rate and selective separating capability and is suitable for use as filter membrane, separator membrane, gas exchange membrane, and a battery separator.

Method of producing microporous film

A portable water-purifying means comprising an oblong pump room containing a hand pump therein and an oblong water-purifying room containing a water-purifying means therein and being equipped on its upper side with a water outlet in a casing equipped with a water inlet. The pump room and the water-purifying room are arranged in parallel to each other with a partition separating the two rooms, and these rooms communicate with each other through a passage arranged on their bottom sides. The water inlet and the passage are provided respectively with check valves which operates to limit flow of water to the direction from the inlet to the water-purifying room.

Portable water purifier

The improvement in a porous hollow fiber having a large number of micropores in its surrounding wall, in which walls of said pores are coated with an essentially water-insoluble alkylcellulose derivative such as ethylcellulose, carboxymethylethylcellulose, hydroxypropylmethylcellulose acetate succinate or hydroxypropylmethylcellulose phthalate, or poly(2-hydroxyethyl methacrylate).

Porous hollow fiber

A filter apparatus comprises a housing having a liquid entrance, a liquid exit, and two tubes protruding from a wall of the housing into an inner space of the housing. The tubes have openings which face each other and have at least one perforation or side opening on their walls, one of the liquid entrance and the liquid exit being connected to one of the tubes. The detachable filter cartridge comprises an outer perforated cylinder, an inner non-perforated cylinder, the outer cylinder being connected to the inner cylinder in coaxial relationship such that a respective end space for receiving a liquid is formed inside each end of the outer cylinder. A bundle of porous hollow fibers is connected between the outer cylinder and the inner cylinder such that openings at both opposite ends of the hollow fibers open to allow passage of liquid from one end space for receiving liquid to another end space via the hollow fibers. The filter cartridge is arranged such that each open end of the inner cylinder sealingly receives therein a respective one of the tubes to form a liquid passage between the two tubes via the inner space of the inner cylinder, and a liquid passage between two tubes via the perforations of one tube, one of the end spaces, the porous hollow tubes, the other of said end spaces, and the perforations of another tube.

Filter apparatus employing hollow fibers

In a porous hollow fiber having a large number of micropores in its surrounding wall, the improvement in which walls of said pores are coated with ethylene oxide-grafted nylon, such as ethylene oxide-grafted nylon 6.

A process of producing a porous thermoplastic resin article in the form of hollow yarn or film which comprises a step for forming a large number of micropores in the article by drawing an article, which is characterized in that the drawing process is performed in a medium selected from the group consisting of nitrogen, oxygen, argon, carbon monoxide and a hydrocarbon such as methane or ethane at a temperature in the range of the freezing point to 50.degree. C. above the boiling point of said medium.

Growing community of inventors

Hirakata, Japan

Eiichi Kamei