OPTICAL PRESSURE-SENSITIVE ADHESIVE SHEET, LIQUID CRYSTAL DISPLAY AND INPUT DEVICE COMPRISING THE SAME

摘要

PURPOSE: A pressure-sensitive adhesive sheet is provided to have excellent adhesion to an optical element, and not to degrade in sensing sensitivity or response rate when using for attaching elements composing an electrostatic capacity type touch panel. CONSTITUTION: A pressure-sensitive adhesive sheet comprises a pressure-sensitive adhesive layer, dielectric constant in 1 MHz is 5-10, and adhesive strength to glass is 3-15 N/20mm. the adhesive strength is measured 30 minutes after attaching the pressure-sensitive sheet to the glass under release angle of 180°and the tensile rate of 300 mm/minute. The pressure-sensitive adhesive layer comprises an acryl-based pressure-adhesive layer. The pressure-sensitive adhesive layer comprises a silane coupling agent. The light transmittance of the pressure-sensitive adhesive layer is 90% or high, and the haze is 3.0% or lower.