BATTERY PACKAGING MATERIAL
A battery packaging material is formed of a laminate. The laminate is composed of an outer layer including a substrate layer, a barrier layer as an intermediate layer, and a heat fusible resin layer as an innermost layer. The total thickness of the laminate is 60 μm to 220 μm. The barrier layer is formed of a metal foil. The product of a stress value and a thickness of the heat fusible resin layer at a time of 10% stretching is 1,200 Pa·m or more.
1 . A battery packaging material comprising:
a laminate,
wherein the laminate includes:
an outer layer including a substrate layer;
a barrier layer as an intermediate layer; and
a heat fusible resin layer as an innermost layer,
wherein a total thickness of the laminate is 60 μm to 220 μm,
wherein the barrier layer is formed of a metal foil, and
wherein a product of a stress value and a thickness of the heat fusible resin layer at a time of 10% stretching is 1,200 Pa·m or more.
2 . The battery packaging material as recited in claim 1 ,
wherein the stress value of the heat fusible resin layer at the time of 10% stretching is 14 MPa to 35 MPa.
3 . The battery packaging material as recited in claim 2 ,
wherein the stress value of the heat fusible resin layer at the time of 10% stretching is 14 MPa to 35 MPa.
4 . The battery packaging material as recited in claim 1 ,
wherein a thickness of the heat fusible resin layer is 20 μm to 120 μm.
5 . The battery packaging material as recited in claim 2 ,
wherein a thickness of the heat fusible resin layer is 20 μm to 120 μm.
6 . The battery packaging material as recited in claim 1 ,
wherein breaking strength of the outer layer is 20 MPa to 160 MPa.
7 . The battery packaging material as recited in claim 2 ,
wherein breaking strength of the outer layer is 20 MPa to 160 MPa.
8 . The battery packaging material as recited in claim 1 ,
wherein a lubricant of 1 mg/m 2 to 10 mg/m 2 exists on a surface of the heat fusible resin layer.
9 . The battery packaging material as recited in claim 2 ,
wherein a lubricant of 1 mg/m 2 to 10 mg/m 2 exists on a surface of the heat fusible resin layer.