| 摘要 |
The present invention addresses the problem of obtaining a self-adhesive surface-protecting film that is highly processing-friendly, and despite adhering to the protected object strongly and being usable on a variety of objects, is not prone to problems such as localized stretching or deformation when unrolled from being stored rolled up. The present invention relates to a polyolefin film characterized by comprising an adhesive layer laminated to one surface of a polypropylene-resin base layer and a release layer laminated to the opposite surface via co-extrusion. This polyolefin film is further characterized in that: the resins constituting the release layer include, at least, a propylene/ethylene block copolymer and a C4+ alpha-olefin (co)polymer; said C4+ alpha-olefin (co)polymer constitutes at least 5% but less than 35% of the total weight of the resin components constituting the release layer; and the surface roughness (SRa) of the release layer is 0.20 to 0.50 µm. |
