How do you measure Tack of adhesive tape?

Force that is needed to adhere to adherend by light force. The measurement is done by setting adhesive tape with the adhesive face upward to the inclined plate with the angle of 30˚(or 15˚), and measure the maximum size of SUS ball, which stops completely within the adhesive face. This is the effective method to find initial adhesion or adhesion at low temperatures.