| 摘要 |
PROBLEM TO BE SOLVED: To provide a soft polyester film having flexibility and transparency and excellent in slipping characteristics. SOLUTION: The biaxially-oriented laminated polyester film is a co-extrusion laminated film comprising at least three layers, A, B, and C of polyester. The outermost layers, A and C layers, consist of a polyester which uses 1,4-cyclohexane dimethanol as one of the glycol components and which contains 0.01-1.0 wt.% of an inactive particle having an average particular size of 0.1-5.0μm. The intermediate layer, B layer, consists of a polyester mainly composed of an aliphatic or cycloaliphatic diol component and a polyalkylene ether glycol component having a number average mol.wt. of 300-4,000. The proportion of the thickness of the B layer occupying in the total thickness of the film is 60-95%, and a Young's modulus at least in one direction of the film is 0.1-3.5 GPa. COPYRIGHT: (C)2004,JPO
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