BIAXIALLY STRETCHED MULTILAYER POLYPROPYLENE FILM AND USE THEREOF

摘要

Disclosed is a biaxially stretched multilayer polypropylene film wherein a front layer and back layer composed of a propylene polymer (a1) are respectively arranged on both sides of a biaxially stretched polypropylene film base layer (B) which is composed of a propylene polymer composition (A) obtained by adding an inorganic compound powder (a2) to the propylene polymer (a1). This biaxially stretched multilayer polypropylene film is characterised in that the front and back layers have a surface roughness (three-dimensional centre plane average roughness SRa) of less than 0.08µm and a glossiness (incident angle: 60 degrees) of not less than 114%, and the multilayer polypropylene film has a total light transmittance of not more than 20% and a density of 0.40-0.65 g/cm 3 .