| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-shrinkable polyester film fitted to a label excellent in all of shrink finish properties, the close contact properties with a bottle and perforation opening properties. SOLUTION: A polyester resin component A mainly containing a trimethylene terephthalate unit and a polyester resin component B mainly containing an ethylene terephthalate unit and a neopentyl terephthalate unit are respectively charged in separate extruders A1 and B1 to be melted and, after the molten resin components A and B are charged in a static mixer in a molten state, they are extruded from the T-die and the non-stretched sheet formed by cooling is at least stretched uniaxially to obtain the heat-shrinkable polyester film. COPYRIGHT: (C)2007,JPO&INPIT |
