MULTI-LAYER LAMINATED FILM

摘要

A multi-layer laminated film includes layers composed using a thermoplastic resin A and layers composed using a thermoplastic resin B, which A layers and B layers are alternately laminated in 51 or more layers, wherein the film has: a heat shrinkage stress of 0.5 MPa to 5 MPa at 150° C. in the longitudinal and width directions of the film; and a heat shrinkage stress kick-off temperature of 110° C. or lower in at least one of the longitudinal and width directions of the film.

主权项

1. A multi-layer laminated film comprising layers composed using a thermoplastic resin A (A layers) and layers composed using a thermoplastic resin B (B layers), which A layers and B layers are alternately laminated in 51 or more layers, wherein said film has:
a heat shrinkage stress of not less than 0.5 MPa and not more than 5 MPa at 150° C. in longitudinal and width directions of said film; and a heat shrinkage stress kick-off temperature of 110° C. or lower in at least one of the longitudinal and width directions of said film, said heat shrinkage stress kick-off temperature being defined as, in a heat shrinkage stress curve determined under a condition where temperature is 25° C. to 200° C. and a heating rate is 5° C./min, the temperature at an intersection between a baseline preceding an initial rise of said heat shrinkage stress curve and a tangent line drawn at a point where said heat shrinkage stress curve has a maximum slope after said initial rise.