Pressure-sensitive adhesive sheet for touch panel, laminate for touch panel, and capacitance-type touch panel

A pressure-sensitive adhesive sheet for a touch panel,

• wherein a relative dielectric constant obtained by impedance measurement at 1 MHz at 20° C. is 4.0 or more,
• a temperature dependency obtained from a temperature dependency evaluation test is 25% or less, and
• a 180 degree peel strength with respect to glass is 0.2 to 1.2 N/mm, wherein the temperature dependency evaluation test comprises interposing a pressure-sensitive adhesive sheet for a touch panel between aluminum electrodes while a temperature is raised from −10° C. to 40° C. at intervals of 10° C., the relative dielectric constant of the pressure-sensitive adhesive sheet is calculated using impedance measurement at 1 MHz at each temperature at intervals, and the minimum value and the maximum value are selected from the relative dielectric constant calculated at each temperature at intervals, and a value obtained from the expression [{(maximum value−minimum value)/minimum value}×100] (%) is taken as the temperature dependency,
• wherein the pressure-sensitive adhesive sheet comprising:
• a first layer having a relative dielectric constant determined by impedance measurement at 1 MHz at 20° C. of 4.0 or more and a temperature dependency A of 25% or less;
• and
• a second layer having a relative dielectric constant determined by impedance measurement at 1 MHz at 20° C. of 4.0 or less and a temperature dependency B of 20% or less,
• wherein the second layer is provided on both surfaces of the first layer, and
• the relative dielectric constant of the first layer at 20° C. is higher than the relative dielectric constant of the second layer at 20° C.