Surface protective film
AssigneeNitto Denko Corporation
InventorsMariko YOSHIDA, Shou UCHIDA, Ikkou HANAKI, Keiji HAYASHI
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Abstract
Provided is a surface protective film that not only maintains its adhesion for an adherend but also shows a small change over time in rewinding force even when stored in a roll shape. The surface protective film of the present invention includes: a back surface layer; a base material layer; and a pressure-sensitive adhesive layer in the stated order, in which: the surface of the back surface layer has a ten-point average surface roughness Rz of 1.0 or more; a rewinding force A after storage at 23° C. is 1.0 N/20 mm or less; and a ratio B/A of a rewinding force B after storage at 50° C. to the rewinding force A after the storage at 23° C. is 1.0 to 2.0.
Claims8
A surface protective film, comprising:
- a back surface layer;
- a base material layer;
- and
- a pressure-sensitive adhesive layer in the stated order, wherein:
- a surface of the back surface layer has a ten-point average surface roughness Rz of 1.0 or more;
- a rewinding force A after storage at 23° C. is 1.0 N/20 mm or less;
- and
- a ratio B/A of a rewinding force B after storage at 50° C. to the rewinding force A after the storage at 23° C. is 1.0 to 2.0.
Dependencies are inferred from the claim text.