| 摘要 |
PURPOSE:To improve impact resistance and taste retentivity while holding excellent mold processability, heat resistance, retort resistance and perfume retentivity of copolymer polyester film. CONSTITUTION:The polyester film for laminating and molding metal plates comprises a copolymer polyester layer (A) having a melting point of 210-345 deg.C and glass transition temperature of 60 deg. or higher, polyester layer (B) made of polyester composition of a mixture of 80-45wt.% of copolymer polyester (I) having a main repetition unit of ethylene terephthalate having 210-245'C and manufactured by using gennanium compound as polymerization catalyst and 20-55wt.% of polyester (II) having main repetition unit of butylene terephthalate having a melting point of 180-223 deg.C laminated, wherein surface roughness (Ra) of the layer (A) is 15nm or less, and surface roughness (Ra) of the layer (B) is 15nm or more. |
