SURFACE PROTECTIVE SHEET SUBSTRATE AND SURFACE PROTECTIVE SHEET
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United States of America Patent
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Issued Date -
Aug 6, 2015
app pub date -
Feb 2, 2015
filing date -
Feb 5, 2014
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Abstract
Provided is a surface protective sheet substrate capable of bringing about weatherability with less weathering stabilizer. The surface protective sheet substrate provided by this invention comprises a polyolefin resin accounting for more than 50% by weight of the entire substrate. The substrate comprises an inorganic weathering stabilizer-containing layer which comprises an inorganic weathering stabilizer. The inorganic weathering stabilizer-containing layer has a thickness of 10 μm or larger, but smaller than 40 μm. The inorganic weathering stabilizer content accounts for 8% by weight or more of the inorganic weathering stabilizer-containing layer. The inorganic weathering stabilizer content per unit area of substrate is 2.0 g/m2 or greater.
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