abstract |
INDUSTRIAL APPLICABILITY By using a surface protective film having a specific degree of orientation in a specific width direction, it is possible to suppress rainbow stains caused by a surface protective film during inspection of an optical member using the Cross-Nicol method, And a surface protective film excellent in workability can be provided. The surface protective film of the present invention is characterized in that it has a pressure-sensitive adhesive layer on at least one surface of a substrate, the substrate is a polyester film, and the orientation degree of 1.5 m in the width direction of the polyester film is within a range of 75 to 90 . |