Adhesive sheet
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United States of America Patent
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Apr 14, 2020
Grant Date -
Jun 21, 2018
app pub date -
Apr 2, 2015
filing date -
Apr 2, 2014
priority date (Note) -
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Abstract
A pressure sensitive adhesive sheet, containing a resin layer provided on a substrate or a release material. The resin layer includes a resin part (X) containing as a main component a hydrocarbon resin, and a particle part (Y) consisting of fine particles containing silica particles. At least a surface (α) of the resin layer opposite to the side of the substrate or the release material has pressure sensitive adhesiveness. The resin layer contains a multilayer structure having a layer (Xα) and a layer (Y1) in this order in the thickness direction from the side of the surface (α). An intensity ratio in the layer (Xα) is less than 0.10, and an intensity ratio in the layer (Y1) is 0.10 or more. The surface (α) has concave portions of irregular shapes.
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