Pressure-sensitive adhesive tape or sheet having light-reflective property and/or light-shielding property, and liquid crystal display apparatus
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United States of America Patent
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Mar 18, 2014
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N/A
app pub date -
Feb 21, 2007
filing date -
Feb 21, 2006
priority date (Note) -
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Abstract
The present invention relates to a pressure-sensitive adhesive tape or sheet having a light-reflective property and/or a light-shielding property, which includes a base material and at least one pressure-sensitive adhesive layer disposed on at least one surface of the base material. The pressure-sensitive adhesive layer is formed by an acrylic pressure-sensitive adhesive composition containing an acrylic polymer (a) and a low-molecular weight polymer component (b) which contains, as a principal monomer component, an ethylenic unsaturated monomer having a glass transition temperature of from 60 to 190° C. when it is formed into a homopolymer and having a cyclic structure within the molecule thereof, and which has a weight-average molecular weight equal to or higher than 3,000 but lower than 20,000. The pressure-sensitive adhesive layer has a gel fraction of from 51 to 75 wt % and a temperature, at a maximum of loss tangent (tan δ), of from −14 to 25° C.
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