Abstract: [PROBLEMS] Disclosed is a heat shrinkable film having excellent heat resistance, content resistance, impact resistance, low/high temperature cycle resistance, and abrasion 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 an overcoat layer (4) arranged on top of the front surface layer (2). The intermediate layer (1) contains first cyclic olefin resin and a random copolymer of ethylene and another ?-olefin or a random copolymer of propylene and another ?-olefin. The front surface layer (2) and the back surface layer (3) respectively contain second cyclic olefin resin and 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.

Abstract: A multi-layered heat-shrinkable film composed of at least three layers has: front-back film layers each composed of a resin composition having cyclic olefin-based resin of from 55 to 95 mass % and linear low-density polyethylene of from 45 to 5 mass %; and an intermediate film layer composed of a resin composition having propylene-?-olefin random copolymer of from 95 to 55 mass % and cyclic olefin-based resin of from 5 to 45 mass %, or composed of a resin composition having: a resin composition of from 95 to 55 mass % mainly composed of the propylene-?-olefin random copolymer; and the cyclic olefin-based resin of from 5 to 45 mass % When immersed in a hot water of 90° C. for 10 seconds, the multi-layered heat-shrinkable film has a heat shrinkage in a lateral direction of 50% or higher, and has a tear propagation strength in a longitudinal direction of from 800 mN to 350 mN.

Abstract: The invention provides an easily tearable film comprising a composition consisting of about 97-60% by weight of polyester and about 3-40% by weight of polyolefin as an essential component.