| 摘要 |
PURPOSE:To enhance low temp. heat shrinkage characteristics, solvent adhesiveness or tear resistance by forming a film from copolyester containing terephthalic acid, isophthalic acid, ethylene glycol and a propane diol derivative represented by a specific formula to stretch the same. CONSTITUTION:A shrink film used in a shrink label or food packing is formed by stretching a film formed from specific copolyester. Specific copolyester contains 95-70mol% of terephthalic acid and 5-30mol% of isophthalic acid as dicarboxylic acid components and contains 90-50mol% of ethylene glycol and 5-20mol% of diethylene glycol and/or tetramethylene glycol as diol components and further contains 5-30mol% of a propane diol derivative represented by formula (wherein R1 is a 1-6C straight chain or branched chain saturated hydrocarbon group and R2 is a 2-6C straight chain or branched chain staturated hydrocarbon group). |
