TWI797330B

Provided are: a polypropylene-based composite film which can exhibit a high heat sealing ability in a temperature range from a lower temperature to a higher temperature, has excellent low-temperature impact resistance and excellent resistance to whitening on bending, and makes it possible to keep the amount of a lubricant in the surface of the film at a value falling within a proper range to achieve a desired value for the static friction coefficient of the surface of the film even when the film is laminated and is then aged at 60°C; and a packaging material using the polypropylene-based composite film. A polypropylene-based composite film characterized by comprising at least two layers composed of a layer A and a layer B, wherein the main component of the layer A is a propylene-based random copolymer having a melt flow rate of 2 to 10 g/10 min. at 230°C and a melting point of 130 to 150°C, the main component of the layer B is a resin composition which contains 100 parts by weight of a propylene-ethylene bloc