PRESSURE-SENSITIVE TYPE ADHESIVE SHEET

To provide a pressure-sensitive type adhesive sheet in which an aqueous pressure-sensitive type adhesive that is hardly affected by lowering of adhesive force due to transition of a plasticizer and is excellent in environmental sanitation property is laminated.SOLUTION: A pressure-sensitive type adh...

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1. Verfasser: SHIMIZU ITARU
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a pressure-sensitive type adhesive sheet in which an aqueous pressure-sensitive type adhesive that is hardly affected by lowering of adhesive force due to transition of a plasticizer and is excellent in environmental sanitation property is laminated.SOLUTION: A pressure-sensitive type adhesive sheet is a laminate that has a pressure-sensitive type adhesive layer formed from an aqueous pressure-sensitive type adhesive, and a soft film containing a plasticizer, wherein the aqueous pressure-sensitive type adhesive contains an acrylic resin (A) obtained by polymerization of an ethylenically unsaturated monomer (a1) having no acid group with an ethylenically unsaturated monomer (a2) having an acid group, the ethylenically unsaturated monomer (a1) having no acid group contains a vinyl acetate monomer, and in 100 mass% of the total of the unsaturated monomers, a percentage content of the vinyl acetate monomer is 15-45 mass%.SELECTED DRAWING: None 【課題】可塑剤の移行による粘着力の低下の影響を受けにくく、かつ環境衛生性に優れた水性感圧式接着剤が積層された感圧式接着シートを提供すること。【解決手段】水性感圧式接着剤から形成されてなる感圧式接着層と、可塑剤を含有する軟質フィルムとを有する積層体である感圧式接着シートであって、 水性感圧式接着剤が、酸基を有しないエチレン性不飽和単量体(a1)と、 酸基を有するエチレン性不飽和単量体(a2)とを重合してなるアクリル樹脂(A)を含み、 酸基を有しないエチレン性不飽和単量体(a1)が酢酸ビニルモノマーを含有し、不飽和単量体の合計100質量%中、酢酸ビニルモノマーの含有率が15~45質量%であることを特徴とする感圧式接着シートにより解決できる。【選択図】なし