| 摘要 |
<p>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 adhesive layer include, at least, a styrene elastomer (consisting primarily of: a block copolymer consisting of styrene-polymer blocks and olefin-polymer blocks; a block copolymer consisting of styrene-polymer blocks and styrene/olefin random-copolymer blocks; and/or hydrogenated versions thereof) and a polyolefin resin; said polyolefin resin constitutes 5-25% of the total weight of the resin components constituting the adhesive layer; the resins constituting the release layer include, at least, a polypropylene resin and a C4+ alpha-olefin (co)polymer; and said C4+ alpha-olefin (co)polymer constitutes at least 5% but less than 25% of the total weight of the resin components constituting the release layer.</p> |
