Importance

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Abstract

Provided is a biaxially oriented polypropylene-based film that is suitable as a raw film for processing and that, without impairing excellent transparency and mechanical properties intrinsically possessed by the biaxially oriented polypropylene-based film, exhibits excellent adhesiveness at the time of vapor deposition, coating, or lamination with another film and also has favorable slipperiness and blocking resistance. The biaxially oriented polypropylene-based film contains at least base material layer (A), surface layer (B), and surface layer (C), each containing a polypropylene-based resin as a main component, wherein each of surface layers (B) and (C) has a wetting tension of 38 mN/m or higher and 50-200 protrusions of 500 nm or larger in a surface area of 2000 μm², and surface layers (B) and (C) have a Martens hardness of 350 N/mm² or lower and 270 N/mm² or lower, respectively, and an arithmetic average roughness (Ra) of 1.5-3.0 nm and 3.5-5.5 nm, respectively.

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First Claim