| abstract |
A void-containing polyester-type film is obtained by drawing a resin composition sheet consisting of a polyester, and a thermoplastic resin which is not compatible with the polyester in at least one direction. The film of this invention has a film base material consisting mainly of the polyester, fine particles consisting mainly of the thermoplastic resin which are dispersed into the film base material, and fine voids formed around the fine particles. The film of this invention has a surface layer having 3 mu m or more thickness, a void percentage of 4% by volume or less in an area having 3 mu m thickness from its surface, and an average void percentage of 8% by volume to 50% by volume. The film of this invention has excellent softeness, lightness, and hiding power, and excellent surface strength. The film can be used as a base material for a label, etc. |