Abstract: In a magnetic levitation transportation system ground coil unit in which inside an annular coil conductor that is annularly wound, a mounting bush 3 including such a mounting hole 3a as to be parallel to a central axis of the coil conductor is disposed, and the coil conductor and the bush 3 are integrally molded using a thermoplastic resin to form a casing 4 of the coil conductor, thickness of the thermoplastic resin of a connection part that provides a connection between the bush 3 and the coil conductor is made smaller than thickness of the coil conductor, and a plurality of reinforcing ribs 4b to 4i that are formed using the thermoplastic resin are provided radially from the bush 3 side toward the coil conductor side to be integral with the connection part and the casing 4.

Abstract: In a magnetic levitation transportation system ground coil unit in which inside an annular coil conductor that is annularly wound, a mounting bush 3 including such a mounting hole 3a as to be parallel to a central axis of the coil conductor is disposed, and the coil conductor and the bush 3 are integrally molded using a thermoplastic resin to form a casing 4 of the coil conductor, thickness of the thermoplastic resin of a connection part that provides a connection between the bush 3 and the coil conductor is made smaller than thickness of the coil conductor, and a plurality of reinforcing ribs 4b to 4i that are formed using the thermoplastic resin are provided radially from the bush 3 side toward the coil conductor side to be integral with the connection part and the casing 4.

Abstract: Provided are a polyarylene sulfide resin composition and its moldings of good mold releasability, good heat resistance and good surface smoothness. Coated with a metal film, the moldings may be lamp reflectors of good image reflection. The resin composition comprises (A) a polyarylene sulfide resin having a melt viscosity of from 100 to 1,500 poises at 300° C. in terms of the resin temperature and at a shear rate of 200 sec−1, (B) an inorganic granular filler having a volume-average particle size of at most 4 &mgr;m, (C) whiskers having a fiber diameter of at most 7 &mgr;m, and (D) a metal salt of a fatty acid having from 26 to 30 carbon atoms.

Abstract: 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.

Abstract: 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° 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.

Abstract: 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.

Abstract: 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.