| 摘要 |
PROBLEM TO BE SOLVED: To provide an adhesive layer having performances of high adhesive force and high adhesiveness despite a thin film state having a thickness of 1 μm to 20 μm, and to provide an adhesive film using the adhesive layer.SOLUTION: The adhesive layer is formed by crosslinking an adhesive composition comprising an acrylic polymer, wherein the adhesive composition comprises: as a (meth)acrylate monomer as a main component, at least one kind of alkyl (meth)acrylate monomer having 1 to 14 carbon atoms in an alkyl group and at least one kind of (meth)acrylate monomer having an aromatic group; and as other copolymerizable monomers, at least one kind of nitrogen-containing vinyl monomer and at least one kind of copolymerizable vinyl monomer containing a carboxyl group and/or of copolymerizable vinyl monomer containing a hydroxyl group. The adhesive layer has a thickness of 1 μm to 20 μm, and shows an adhesive force of 4.0 (N/25 mm) or more when the layer is 5-μm thick. |
