| abstract |
It is an object of the present invention to provide a battery packaging material having excellent moldability because cracks, pinholes, and the like are less likely to occur during molding. In the battery packaging material comprising a laminate having at least a base layer, an adhesive layer, a metal layer, and a sealant layer in this order, the adhesive layer satisfies at least two of the following physical properties (1) to (3), It is difficult to generate cracks or pinholes, and remarkably excellent moldability can be provided. (1) The hardness when 5 micrometers of indenters are pressed into the adhesive layer from the end face of the layered product using a nanoindenter is 20 to 115 MPa. (2) The peak temperature of the loss modulus obtained when measuring the dynamic viscoelasticity at a frequency of 1 Hz with respect to the adhesive layer is 10 to 60°C. (3) When the integral value of the peak area in 2800 to 3000 cm -1 measured by the infrared absorption spectroscopy method is I M , and the integral value of the peak area in 3100 to 3500 cm -1 is I H I H /I M is 0.15 to 1.5. |