| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a double coated pressure-sensitive adhesive sheet which has a thin layer, is excellent in transparency, adhesion and resistance to blistering and exfoliation and exhibits excellent external appearance when stuck to a plastic substrate or the like. <P>SOLUTION: The double coated pressure-sensitive adhesive sheet has a pressure-sensitive adhesive layer which is formed from a pressure-sensitive adhesive composition and has 3-15μm thickness and≤0.030μm thickness variation on the whole surface. The adhesive composition contains 100 parts by weight acrylic polymer and 10-35 parts by weight acrylic oligomer. The acrylic polymer is obtained by polymerizing a monomer component containing 50-99 wt.% alkyl (meth)acrylate having a 4-12C alkyl group and 1-10 wt.% monomer having a carboxy group and has 500,000-900,000 molecular weight. The acrylic oligomer is obtained by oligomerizing another monomer component containing 50-99 wt.% (meth)acrylate, which has 60-190°C glass transition temperature when a homopolymer is formed therefrom and which has a circular structure, and 1-10 wt.% monomer having a carboxy group and has 3,000-6,000 molecular weight. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
