| 摘要 |
PURPOSE: Provided is a composition polyester for film preparation, which is excellent in abrasion resistance and scratch resistance, and is suitable for magnetic recording media by adding aluminum silicate particles having modified surface and further particles with different diameter. CONSTITUTION: The composition is characterized by containing 0.01-5pts.wt.(based on 100pts.wt. of the polyester resin) of aluminum silicate particles in diameter 0.01-2.0micrometer containing aluminum and silica as main component and alkali metal, wherein, the aluminum silicate particles have a silica/aluminum molar ratio between 0.25 and 10, and a aluminum/alkali metal molar ratio between 1.0-2.0.
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