| 摘要 |
PURPOSE:The titled film that is obtained by adding kaolin particles of apecific particle sizes and barium sulfate particles of larger average particle sizes than the former, thus showing improved slip properties and non-abrasive qualities without formation of scuff marks and white powder. CONSTITUTION:A polyester mainly composed of recurring units of ethylene terephthalate is combined with 0.01-1.0wt%, preferably 0.1-0.5wt%, of kaolin particles of 0.01-1.5mum, preferably 0.1-0.5mum particle sizes and 0.11-1.0wt%, preferably 0.15-0.5wt%, of barium sulfate particles of 0.5-5.0mum, preferably 0.5- 2.0mum average particle sizes, which is larger than the former particles. These particles are spherical or cubic and less anisotropic. The addition is effected preferably in the form of a slurry.
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