| abstract |
At least, it is composed of a laminate comprising a polyester film layer, an aluminum alloy foil layer and a heat-fusible resin layer in this order, The thickness of the polyester film layer is 23 μm or more, 27 μm or less, The thickness of the aluminum alloy foil layer is 27 μm or more, 43 μm or less, The thickness of the heat-fusible resin layer is 70 μm or more and 100 μm or less, A packaging material for a battery, wherein a dielectric breakdown voltage of a surface on a side of the polyester film layer is 13 kV or more. |