EASY-TO-TEAR STRETCHED ALIPHATIC-POLYESTER FILM

摘要

Easily-tearable aliphatic polyester stretched film has an edge tear strength in the machine direction and transverse direction of = 22N. Independent claims are also included for: (1) an easily-cut bag for packing manufactured using a film where active rays are irradiated on aliphatic polyester film; and (2) the manufacture of a lactic acid-type polyester film where a non-stretched laminated film formed by laminating a resin (B) having a melting point Tm bon >= 1 surface of a lactic acid-type aliphatic polyester resin layer (A) of melting point TM aso Tm b>= Tm a+ 10[deg]C, so the thickness of (B) is 5-60% compared to the thickness of the whole film, is stretched in >= 1 axial direction and heat treated to a temperature Ts which satisfies Tm a- 10[deg]C = Tm b+ 10[deg]C.