Idemitsu Petrochemical Co., Ltd.

Mitsubishi Electric Corporation

Idemitsu Kosan Company, Limited

Central Japan Railway Company

Toru Iga

Tomoyoshi Murakami

Shigemasa Suzuki

Yoshifumi Itabashi

Eiji Tamura

Akihiro Fujita

Yoshihiro Jizo

Hiromori Ishihara

Haruo Kobayashi

Yaichi Fuwa

Hiroaki Ota

In a magnetic levitation transportation system ground coil unit in which inside an annular coil conductor that is annularly wound, a mounting bushincluding such a mounting holeas to be parallel to a central axis of the coil conductor is disposed, and the coil conductor and the bushare integrally molded using a thermoplastic resin to form a casingof the coil conductor, thickness of the thermoplastic resin of a connection part that provides a connection between the bushand the coil conductor is made smaller than thickness of the coil conductor, and a plurality of reinforcing ribstothat are formed using the thermoplastic resin are provided radially from the bushside toward the coil conductor side to be integral with the connection part and the casing

Magnetic levitation transportation system ground coil unit and manufacturing method thereof

Provided is a polyarylene sulfide resin composition comprising (A) from 20 to 34% by weight of a polyarylene sulfide having a melt viscosity of from 150 to 800 poises, (B) from 66 to 80% by weight of spherical silica having a mean particle size of from 0.3 to 10 &mgr;m, and (C) from 0 to 12% by weight of whiskers, in which the total of the spherical silica (B) and the whiskers (C) falls between 66 and 80% by weight. The composition has well-balanced physical properties of dimensional accuracy and mechanical strength, and has good moldability. It is favorable to moldings for precision members such as optical fiber connector ferrules, etc.

Polyarylene sulfide resin composition

Provided is a polyarylene sulfide (PAS) resin composition having extremely high dimensional accuracy and favorable to fiber-optics connector members, etc. The PAS resin composition for optical telecommunication members comprises (A) from 20 to 35% by weight of a polyarylene sulfide having a crystallization temperature, as measured through differential scanning calorimetry, of not lower than 250&deg; C., and (B) from 65 to 80% by weight of silica, preferably spherical silica having a mean particle size of from 1 to 10 &mgr;m.

Polyarylene sulfide resin composition for optical telecommunication members

Disclosed are slide members for parts to be in contact with magnetic tape, which are made of polyarylenesulfide resin compositions comprising from 20 to 40% by weight of a polyarylenesulfide resin optionally combined with an amorphous, thermoplastic resin, and from 60 to 80% by weight of calcium metasilicate whiskers having a mean fiber diameter of not larger than 5 .mu.m and a mean aspect ratio of not smaller than 5, optionally combined with an inorganic filler. While being shaped, the resin compositions have good fluidity. The slide members are used in electric and electronic devices as the parts to be in contact with magnetic tape, for example, as VTR cylinders (drums). The slide members have high mechanical strength and good dimensional stability, and have good slidability with magnetic tape.

Slide member for parts to be in contact with magnetic tape

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Ichihara, Japan

Toru Iga