Abstract:
A die-bonding layer formation film to be used for fixing a processed product to an adherend, includes an adhesive layer, wherein, the storage elastic modulus has a local minimum value at a temperature within a range of 80° C. to 150° C., wherein the adhesive layer has a shear strength to a peeling strength test substrate of 20 N/2 mm□ or more and 50 N/2 mm□ or less, wherein the shear strength is measured after the processed product is placed above the peeling strength test substrate via the die-bonding layer formation film and the die-bonding layer formation film on the peeling strength test substrate is heated at 175° C. for 1 hour and then further maintained under an environment of 250° C. for 30 seconds. Bubbles (voids) are unlikely to grow at the boundary between the adhesive layer and an adherend even when subjected to thermal history.
Abstract:
A protective film-forming composite sheet 10 comprises a pressure sensitive adhesive sheet 16 in which a pressure sensitive adhesive layer 12 is provided on a base material 11, a protective film-forming film 13, and a release film 14. When α (mN/25 mm) represents the maximum peel force between the protective film-forming film 13 and the release film 14; β (mN/25 mm) represents the minimum peel force between the pressure sensitive adhesive sheet 16 and the protective film-forming film 13; and γ (mN/25 mm) represents the maximum peel force between the pressure sensitive adhesive sheet 16 and the protective film-forming film 13, the following relationships (1) to (3) hold for α, β, and γ; β≧70 (1) α/β≦0.50 (2) γ≦2000 (3).
Abstract:
The invention relates to a peel detection label that is a laminate including a support, a pattern layer formed in a part of the surface of the support, and a pressure-sensitive adhesive laminate having at least a low modulus layer (X), a high modulus layer (Y) and a pressure-sensitive adhesive layer (Z) in that order, in which the low modulus layer (X) has a surface in contact with the support and the pattern layer and a surface in contact with the high modulus layer (Y), and satisfies the following requirement (1): Requirement (1): when the pressure-sensitive adhesive layer (Z) of the peel detection label is attached to an adherend and then the peel detection label is peeled off from the adherend, the maximum vertical tensile stress applied to an element of the low modulus layer (X) that is located closest to the support is 0.19 MPa or more when analyzed by a finite element method using Abaqus.