| 摘要 |
<p>[PROBLEMS] Disclosed is a heat shrinkable film having excellent heat resistance, content resistance, impact resistance, low/high temperature cycle resistance and wear resistance. [MEANS FOR SOLVING PROBLEMS] Specifically disclosed is a heat shrinkable film comprising an intermediate layer (1), a front surface layer (2) and a back surface layer (3) so arranged as to sandwich the intermediate layer (1), and a overcoat layer (4) arranged on top of the front surface layer (2). The intermediate layer (1) contains a first cyclic olefin resin and a random copolymer of ethylene and another .alpha.-olefin or a random copolymer of propylene and another .alpha.-olefin. The front surface layer (2) and the back surface layer (3) respectively contain a second cyclic olefin resin and a linear low density polyethylene resin. Such a multilayer heat shrinkable film is formed into a tubular shape in such a manner that the overcoat layer (4) is on the outside. A secondary battery is fitted into the thus-formed tube of the multilayer heat shrinkable film and the tube is heat shrunk, so that there is obtained a wrapped battery.</p> |
