| 摘要 |
PROBLEM TO BE SOLVED: To provide a useful low-cost polyester stretchable film which is endowed with a good tearability without losing strength, transparency, heat resistance, barrier properties and the like as packaging/tape film or a tear aperture of a PTP package/a drink pack. SOLUTION: This polyester resin film is formed of more than one kind of polyester resin layers with a different melting point laminated together. In addition, the film shows a good tearability with a piercing strength of not more than 8.0 N. COPYRIGHT: (C)2005,JPO&NCIPI |
