| 摘要 |
<p>PURPOSE:To provide a polyester film for a magnetic tape excellent in strength and abrasion resistance. CONSTITUTION:A polyester film for a magnetic tape is formed by laminating polyester (B) whose m.p. is lower than that of crystalline polyester (A) to at least the single surface of the layer composed of said polyester (A) and characterized by that the Young's moduli in the longitudinal and lateral directions thereof are 600kg/mm<2> or more.</p> |
