SURFACE PROTECTION FILM
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United States of America Patent
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Issued Date -
Jan 10, 2013
app pub date -
Mar 10, 2011
filing date -
Mar 31, 2010
priority date (Note) -
Abandoned
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Abstract
A surface protection film has moderate adhesive properties for adherend bodies with a rough surface, has a rear surface with good slipping properties, and blocking resistance and good unwinding properties (decreased unwinding tension to enable easy, high-speed sticking of the film to an adherend without causing creases or flaws). The surface protection film has a three-layered composite structure including an adhesive layer, an interlayer, and a back layer, wherein the adhesive layer is formed of 35 to 90 wt % of a linear low density polyethylene, 5 to 50 wt % of a styrene-based elastomer, and 15 wt % or less of a tackifier, the interlayer formed mainly of a propylene-based resin, and the back layer formed mainly of the same propylene-based resin as that constituting the interlayer and/or a different propylene-based resin therefrom, and also wherein the back layer has a surface roughness of 3 μm or more in terms of ten-point average roughness (Rz).
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