| 摘要 |
PURPOSE:To avoid the occurrence of contractile unevenness and creases of a film during heat shrinkage when used as a contractile label. CONSTITUTION:Copolymeric polyester resin comprising a dicarboxylic acid component consisting of 100mol.% terephthalic acid, and diol component consisting of 70mol.% ethylene glycol and 30mol.% 1,2-cyclohexane dimethanol is employed as a material. By means of a tenter stretcher, it is oriented 3,0 times at 85 deg.C in the transverse direction. Similarly, by means of a tenter stretcher, it is heat-treated, while the transverse direction is maintained, at a treatment temperature of 100 deg.C for a treatment time of 120sec. As a result, a heat-shrinkable film having a thickness of 40mum can be obtained. |
