OPTICAL PRESSURE-SENSITIVE ADHESIVE SHEET

摘要

PURPOSE: An optical adhesive sheet is provided to control the change of an electrostatic capacity which is a cause of a malfunction in case of being applied to an optical accessory. CONSTITUTION: An optical adhesive sheet(12) comprises an adhesive layer. A specific permittivity is 2-8 at a frequency of 1 MHz. A dielectric tangent is more than 0 and less than 0.2 at a frequency of 1 MHz. A degree of accuracy for thickness is 10% or less. An adhesive layer is an acryl adhesive layer. An acryl adhesive layer contains acrylic polymer comprising an alkyl (meth)acrylate having C1-14 linear or branched alkyl group and/or a component having alkoxyalkyl (meth)acrylate as a compulsory monomer as a base polymer.