SURFACE PROTECTIVE FILM
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United States of America Patent
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Issued Date -
Feb 28, 2013
app pub date -
Mar 10, 2011
filing date -
Apr 13, 2010
priority date (Note) -
Abandoned
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Abstract
A surface protective film includes a three-layer laminated structure including an adhesive layer, a middle layer and a back layer, wherein the adhesive layer is formed from at least one selected from the group consisting of an ethylene-α-olefin copolymer and an ethylene-methyl methacrylate copolymer, the middle layer containing at least one selected from the group consisting of a polyethylene-based resin having a density of 0.870-0.935 g/cm3 and an ethylene-methyl methacrylate copolymer, and the back layer includes a polypropylene-based resin and a low-density polyethylene, wherein the back layer has a surface with an arithmetic average roughness (Ra) of 0.6 μm or more and a ten-point average roughness (Rz) of 4 μm or more.
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