Patent ID: 11932730
Assignee: POLYPLASTICS CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 0:
1. A polyarylene sulfide resin composition comprising a polyarylene sulfide resin (A) and silica particles (B), wherein:
the polyarylene sulfide resin (A) has a melt viscosity, as measured at a temperature of 310° C. and a shear rate of 1200 sec−1, of 35 to 80 Pas;
a content of the polyarylene sulfide resin (A) is 25 to 40% by mass based on a mass of the polyarylene sulfide resin composition;
the silica particles (B) comprise smaller-particle-size silica particles (B1) and larger-particle-size silica particles (B2);
a content of the smaller-particle-size silica particles (B1) is 35 to 120 parts by mass based on 100 parts by mass of the polyarylene sulfide resin (A);
a content of the larger-particle-size silica particles (B2) is 100 to 240 parts by mass based on 100 parts by mass of the polyarylene sulfide resin (A);
the smaller-particle-size silica particles (B1) have a mean particle size of 1 μm or less;
the larger-particle-size silica particles (B2) have a mean particle size of 2 μm or more and 10 μm or less;
in sieving a sample of the silica particles (B) in a wet process using a sieve with an opening size of 45 μm, a ratio of a mass of the silica particles (B) on the sieve to a total mass of the sample of the silica particles (B) is 10 ppm by mass or less.