| abstract |
The present invention provides an adhesive for a repeated bending device, which can suppress the deformation of the adhesive layer after the bending state is released when it is applied to the repeated bending device and is repeatedly bent or placed in a long-term bending state, and the influence caused by the above situation is alleviated. The maximum relaxation modulus value measured when the adhesive is deformed by 10% is set as the maximum relaxation modulus, and the adhesive is continuously deformed by 10% from the measurement of the maximum relaxation modulus to 3757 seconds, and the minimum relaxation measured during this period is The modulus value is set as the minimum relaxation modulus, and the relaxation modulus change value is calculated from this; the creep compliance value measured when a stress of 3000 Pa is applied to the adhesive is set as the minimum creep compliance value, and from the measurement to the minimum creep The stress of 3000Pa is continuously applied from the beginning of the compliance to 3757 seconds, and the maximum creep compliance value measured during this period is set as the maximum creep compliance, so as to calculate the creep compliance change value; the relaxation modulus change value and creep The product value of the compliance variation value is 3 or less. |