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(EN) The purpose of the present invention is to provide a surface protection film that satisfies handling properties represented by anti-blocking properties, and various and numerous workability properties, including, favorable heat resistance and cutting properties, and the like. Provided is a surface protection film for a heating process, characterized by being formed from a compound form in which an adhesive layer (A), an intermediate layer (C), and a back layer (3) are layered in that order, the (A) layer comprising a polyethylene-based resin (a1) and a tackifier (a2) or an elastomer (a3), the (B) layer and the (C) layer each comprising a polypropylene-based resin (b) and a polypropylene-based resin (c), and the difference |[rho]C - [rho]A| between the density ([rho]C) of the (C) layer resin composition and the density ([rho]A) of the (A) layer resin composition and the difference |[rho]C - [rho]B| between the density ([rho]C) of the (C) layer resin composition and the density ([rho]B) of the (B) layer resin composition each being 0.020 g/cm3 or less.
(ZH) 本发明欲提供一种表面保护膜，其在以抗粘连性为代表的操作性、以及良好的耐热性、切断等各种各样的加工性方面均可得以满足。本发明为一种加热工序用表面保护膜，其特征在于，由将粘合层(A)、中间层(C)及背面层(B)这3层依序层合而成的复合形态形成，(A)层含有低密度聚乙烯类树脂(a1)、及赋粘剂(a2)或弹性体(a3)，(B)层及(C)层分别含有聚丙烯类树脂(b)及聚丙烯类树脂(c)，(C)层树脂组合物的密度ρC与(A)层树脂组合物的密度ρA之差|ρC‑ρA|、及(C)层树脂组合物的密度ρC与(B)层树脂组合物的密度ρB之差|ρC‑ρB|均为0.020g/cm3以下。
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