| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a surface protective film having superior protective properties of adherend and transparency after a process for coating an adhesive to a base material film, little in transitivity of additives, and having superior adhesive coating properties, lamination processability/peelability to/from the adherend. <P>SOLUTION: The surface protective film is composed of a polypropylene resin which contains substantially no crystal nucleating agent, no antiblocking agent and no lubricant. Meanwhile, this polypropylene resin contains ≥85 wt.% of a homopolypropylene resin. As for the surface protective film, both tensile elastic moduli in a TD (traverse direction) and in an MD (machine direction) are ≥750 MPa, both fracture elongations in the TD and in the MD are ≥450%, both shrinkage factors at 125°C in the TD and in the MD are 0 to 1.0%, a haze value is ≤13.5% and a number of fish eyes having sizes of ≥0.1 mm is ≤20 pieces/m<SP POS="POST">2</SP>. <P>COPYRIGHT: (C)2012,JPO&INPIT |
