Abstract: An adhesive for an electrical storage device packaging material containing a polyol compound (A), a polyisocyanate compound (B), and an epoxy resin (C), in which the polyol compound (A) contains an ester bond-containing polyol, and the following formula is satisfied when a stress at the time when a cured film obtained by performing curing under the condition of 80° C. for 2 weeks is stretched to twice its length at a speed of 6 mm/min under an environment of 20° C. and 65% RH is S1 [N/mm2], and a stress at the time when the cured film is held for 100 seconds in a stretched state is S2 [N/mm2]. Formula: 10.0?(S1?S2)/S1×100?40.0.

Abstract: An ultrasonic inspection system includes an ultrasonic sensor which includes a piezoelectric element to transmit and receive an ultrasonic wave and a calibration piece, and a control device. The calibration piece includes a propagation portion extending along an upper surface of the piezoelectric element, and a propagation redirecting portion which is formed on one side in an extending direction of the propagation portion, and is connected to the piezoelectric element through a heat resistant adhesive. The propagation redirecting portion includes a slope inclined in a vertical direction to the upper surface of the piezoelectric element.

Abstract: An ultrasonic inspection system includes an ultrasonic sensor which includes a piezoelectric element to transmit and receive an ultrasonic wave and a calibration piece, and a control device. The calibration piece includes a propagation portion extending along an upper surface of the piezoelectric element, and a propagation redirecting portion which is formed on one side in an extending direction of the propagation portion, and is connected to the piezoelectric element through a heat resistant adhesive. The propagation redirecting portion includes a slope inclined in a vertical direction to the upper surface of the piezoelectric element.

Abstract: An adhesive with which a battery packaging material capable of maintaining a strong adhesive strength even after a long-term endurance test and having an excellent moldability can be formed is provided. A polyurethane adhesive for a battery packaging material according to the present invention includes a main agent and a curing agent, in which the main agent contains an acrylic polyol (A) having a number-average molecular weight of 10,000 to 100,000 and a hydroxyl value of 1 to 100 mgKOH/g, and an equivalent ratio [NCO]/[OH] of an isocyanate group derived from an aromatic polyisocyanate (B) contained in the curing agent to a hydroxyl group derived from the acrylic polyol (A) is 10 to 30.