POLYPHENYLENE SULFIDE FILM AND PROCESS FOR ITS PRODUCTION.

摘要

A polyphenylene sulfide film formed from a resin composition mainly composed of polyphenylene sulfide, characterized in that fine particles of 0.05 to 3 mu m in the mean particle size are dispersed in the film and a single particle index of said fine particle is 0.5 or more. This film is useful as dielectric film for film capacitors having stabilized initial properties by virtue of its excellent sliding properties and largely reduced electrical insulation defects. Furthermore, it is also useful as the base film for a magnetic recording medium having excellent electromagnetic transduction properties and reduced dropout by virtue of its excellent sliding properties and surface smoothness.