Adhesive sheet, construct, and method for producing construct

Abstract

An adhesive sheet (1) comprising an adhesive layer (11) composed of an adhesive having active energy ray curability and ultraviolet ray absorbability, wherein when one surface of the adhesive layer (11) is irradiated with ultraviolet rays having a light amount of 2000 mJ/cm2 to cure the adhesive layer (11) and an infrared absorption spectrum is then measured by a total reflection measurement method for each of an irradiated surface and a non-irradiated surface, the maximum value of the absolute value of absorbance is 0.0001 to 0.012 within a wavenumber range of 700 to 1000 cm−1 in a difference spectrum obtained by subtracting the infrared absorption spectrum of the non-irradiated surface from the infrared absorption spectrum of the irradiated surface, and when the adhesive layer (11) is irradiated with ultraviolet rays having a light amount of 2000 mJ/cm2 to cure the adhesive layer (11), the difference in a gel fraction of the adhesive constituting the adhesive layer (11) before and after the irradiation is 5 points or more and 50 points or less. According to such an adhesive sheet (1), both the light resistance and the blister resistance can be achieved satisfactorily.

Dependencies are inferred from the claim text.