Optical adhesive tape

Abstract

The present invention aims to provide an optical adhesive tape for use in spliced ​​displays that arrange multiple image display devices in a tiled configuration. This ensures that even under certain operating conditions, the gaps between the multiple image display devices remain inconspicuous, and that transparency is maintained for a good appearance. The optical adhesive tape 10A of the present invention has a laminated structure comprising a substrate 1 and an adhesive layer 2. The substrate 1 has a first surface 1a and a second surface 1b, and the adhesive layer 2 is located on the first surface 1a of the substrate 1. After heating the optical adhesive tape 10A at 60°C and 90% relative humidity for 500 hours, the average dimensional change rate in its width and mechanical directions is within ±0.15%. The residual stress value of the adhesive layer 2 under 300% tensile stress is less than 10 N / cm².

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