Adhesive sheet, adhesive composition, adhesive sheet with release film, laminate for image display device, and flexible image display device

Abstract

What is provided is an adhesive sheet in which a high level of both unevenness followability during bonding and shape holding power when not bonded is achieved and flexibility especially in a low-temperature environment is excellent. The adhesive sheet includes an adhesive layer formed from an adhesive composition containing a (meth)acrylic copolymer, in which (1) when the thickness is set to 0.7 to 1.0 mm, a strain (creep strain) by applying a pressure of 2 kPa at a temperature of 60° C. for 600 seconds is 1000% or more and 100000% or less, (2) in a holding power measurement in accordance with JIS-Z-0237 (ISO29863), a falling time when the adhesive sheet is adhered to a SUS plate with an area of 20 mm×20 mm and a load of 500 gf is applied in an atmosphere of 40° C. is 60 seconds or more, and (3) when the thickness is set to 0.7 to 1.0 mm, a storage shear modulus at −20° C. (G′ (−20° C.)) obtained by a dynamic viscoelasticity measurement in a shear mode at a frequency of 1 Hz is 10 kPa or more and 1000 kPa or less are satisfied.

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