| 摘要 |
<p>A composite polyester film comprising a major layer and a minor layer composed of a polyester having a melt resistivity of less than 5 x 108 Φ.cm and lower than that of a polyester constituting the major layer and a thickness of 1/200 to 4/10 of the thickness of the composite film as a whole. The film exhibits excellent electrostatic castability and heat stability.</p> |
