| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a surface protective film excellent in the adhesive property to optical materials, the over-time adhesive stability, the transparency, the rewinding property, and the heat resistance. <P>SOLUTION: The surface protective film is composed of at least two layers of a surface layer (A) and an adhesive layer (X). The surface layer is composed of a polyolefin resin. The adhesive layer (X) is formed of a composition composed of 5 to 95 wt.% of a low-crystallinity α-olefin (co)polymer (X-1) obtained using a metallocene catalyst and containing a ≥3C α-olefin as a main component and 95 to 5 wt.% of a propylene (co)polymer (X-2) having a melting point in the range of 50 to 130°C and obtained using a metallocene catalyst (the total of (X-1) and (X-2) is taken to be 100 wt.%). <P>COPYRIGHT: (C)2012,JPO&INPIT |
