| 摘要 |
PROBLEM TO BE SOLVED: To provide a double-sided pressure-sensitive adhesive tape suitably fixing a transparent panel provided with a decorative part and the surface of an image displaying device, effective for suppressing the generation of bubbles at a stepped part and the generation of bubbles with time and having excellent drop impact resistance. SOLUTION: The double-sided pressure-sensitive adhesive tape, for pasting and fixing the transparent panel provided with the decorative part to the surface of the image displaying device, is composed of a pressure-sensitive adhesive layer obtained by curing a photo-setting pressure-sensitive adhesive composition composed mainly of a 1-12C alkyl (meth)acrylate, the pressure-sensitive adhesive layer has a loss tangent of the kinetic viscoelastic spectrum of 0.43-0.98 measured at 1 Hz frequency and 70°C and a storage elastic modulus of 0.8×10<SP>4</SP>to 3.4×10<SP>4</SP>Pa at 70°C, the pressure-sensitive adhesive layer has the loss tangent peak in a temperature range of -40 to -10°C, and the thickness of the pressure-sensitive adhesive layer is 100-250μm. The generation of observable bubbles can be suppressed and the bonded parts are resistant to peeling even by the application of drop impact force. COPYRIGHT: (C)2009,JPO&INPIT |
