| 摘要 |
<p>A biaxially oriented polyester film composed of an intimate mixture of an aromatic polyester, barium sulfate particles having an average particle diameter of 0.1 to 10 micrometers, and an alkali metal or alkaline earth metal salt of a higher fatty acid having 8 to 34 carbon atoms. The fatty acid metal salt has a melting point in the range of 120 to 320 DEG C. The biaxially oriented polyester film has substantially no difference in surface properties such as surface roughness and the degree of gloss between its surface and back, and can be produced industrially advantageously with high producibility and excellent operability.</p> |
