| abstract |
The present invention provides conditions for making a battery packaging material in which a base material layer, a barrier layer and a heat-fusible resin layer are laminated in this order to have a base material layer excellent in moldability. The base material layer contains a polyethylene terephthalate film, and the difference in heat of fusion ΔH 1-2 determined by the following method is 6 J/g or more. According to the regulations of JIS K7122-2012, using a differential scanning calorimeter, the temperature was heated from 0°C to 300°C at a temperature increase rate of 10°C/min, and the heat of fusion H 1 measured in the first measurement was measured. After the measurement of the heat quantity H1, after cooling from a temperature of 300°C at a temperature drop rate of 10°C/min to a temperature of 0°C, heating from a temperature of 0°C to a temperature of 300°C at a temperature increase rate of 10°C/min, the measurement is performed in the second measurement The heat of fusion H 2 . The difference in heat of fusion ΔH 1-2 is calculated by subtracting the heat of fusion H 2 from the heat of fusion H 1 . |