TACKY HYDROGEL, AND TACKY GEL SHEET AND ELECTRODE PAD USING THE SAME

PROBLEM TO BE SOLVED: To provide a tacky hydrogel excellent in both processability and tackiness, and to provide a tacky gel sheet and an electrode pad each using the hydrogel.SOLUTION: The tacky hydrogel is provided, being such that: it is formed into a tacky gel sheet of 0.75 mm thick, which is then cut into two test sheets of 25 mm×40 mm; they are fixed onto the circular columnar surfaces 1a and 2a, with a radius of curvature R=7.5 mm each facing each other, of respective upper jig 1 and lower jig 2 so that the longitudinal centerlines of the respective test sheets are horizontal, these sheets are pressed on each other under a load of 2 N for 30 s. followed by moving the upper jig 1 vertically upward at a speed of 50 μm/s to mutually peel them off; the peel load at this time is measured to make a curve representing the relationship between the peel load and the time; and the processability evaluation value obtained with a method of calculating the area of a part lying between the curve and the time axis stands within 4.0-20.0 [N×sec].