| 摘要 |
<p>PURPOSE: To provide a laminated polyester film, which is cladded to a metal plate and excellent in formability at canning such as spinning or the like, impact resistance after canning and the aromaproofness of contents. CONSTITUTION: This film is a laminated film, in which polyester layer (A) made of a copolymer polyester (I) having the melting point of 210-245 deg.C and the glass transition temperature of not less than 60 deg.C is laminated to polyester layer (B) made of a polyester composition, which is composed of 99-60wt.% copolymer ester (II) having the melting point of 210-255 deg.C and the glass transition temperature of not less than 60 deg.C and 1-40wt.% polyester (III) having the melting point of 180-223 deg.C. The resultant laminated film contains 1-44ppm of alkali metal element.</p> |
