| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a self-adhesive surface protection film which hardly causes a problem including partial elongation and deformation of the film when stored in a roll form and thereafter delivered although exhibiting a strong adhesive force to an adherend and usable for various adherends, and which is excellent in processing suitability. <P>SOLUTION: The polyolefinic film is prepared by laminating by coextruding an adhesive layer on one surface of a base material layer composed of a polypropylenic resin and a releasing layer on the opposite surface. A resin constituting the adhesive layer contains at least a styrenic elastomer (mainly composed of a block copolymer of a styrenic polymer block and an olefinic polymer block, a block copolymer of a styrenic polymer block and a random copolymer of styrene and an olefin, and/or hydrogenated additives thereof), and a polyolefinic resin, and the blend amount of the polyolefinic resin is ≥5 wt% and ≤25 wt% in the resin component constituting the adhesive layer. A resin constituting the releasing layer contains at least a polypropylenic resin and a ≥4C α-olefin (co)polymer, and the blend amount of the ≥4C α-olefin (co)polymer is ≥5 wt% and ≤25 wt% in the resin component constituting the releasing layer. <P>COPYRIGHT: (C)2013,JPO&INPIT |
