| 摘要 |
<p>A polyester composition, comprising a thermoplastic polyester resin and hydroxy apatite particles with an average particle diameter of 0.01 to 10 mu m and a specific surface area of 50 to 500 m<2>/g and represented by the following chemical formula, and a film made thereof. A polyester film excellent in such basic properties as slipperiness and abrasion resistance, and also in electric properties, perforability, processability as a laminate with a metallic sheet, flavor properties, etc. can be obtained. Ca(PO4)1(OH)m(CO3)nYx (where Y stands for any optional anions other than phosphate group, hydroxyl group and carbonate group, l = 0.4 SIMILAR 0.6, m = 0.1 SIMILAR 0.4, n = 0 SIMILAR 0.2, x = 0 SIMILAR 0.2, 3 x l + m + 2 x n + z x x = 2 (z is the valence of anion(s) Y)) <IMAGE></p> |
