Laminated body for power storage device outer packaging material
A laminated body includes a barrier layer made of metal, a base material layer made of a heat-resistant resin laminated on an outer side surface of the barrier layer, and a sealant layer made of a heat sealable resin laminated to an inner side surface of the barrier layer. The base material layer includes a polyester film layer as an outer layer and a polyamide film layer as an inner layer. The polyester film layer is 500 MPa to 600 MPa in a sum of breaking strength in an MD and breaking strength in a TD, 0.8 to 1.1 in a ratio of the breaking strength in the TD to the breaking strength in the MD, and 110% to 200% in breaking elongation in the MD and breaking elongation in the TD. The MD denotes a machine flow direction, and the TD denotes a direction perpendicular to the MD.
1. A laminated body for a power storage device outer packaging material, comprising:
a barrier layer made of metal;
a base material layer made of a heat-resistant resin laminated on an outer side surface of the barrier layer, the base material layer is composed of a polyester film layer as an outer layer and a polyamide film layer as an inner layer; and
a sealant layer made of a heat sealable resin laminated to an inner side surface of the barrier layer,
wherein an in-between base materials adhesive layer is laminated between the polyester film layer and the polyamide film layer, and an easily adhesive layer is laminated on a surface of the polyester film layer, the surface of the polyester film layer being on a side of the in-between base materials adhesive layer,
wherein the polyester film layer is
500 MPa to 600 MPa in a sum of breaking strength in an MD and breaking strength in a TD,
0.8 to 1.1 in a ratio of the breaking strength in the TD to the breaking strength in the MD, and
110% to 200% in breaking elongation in the MD and breaking elongation in the TD, and
wherein the MD denotes a machine flow direction, and the TD denotes a direction perpendicular to the MD.
2. The laminated body for a power storage device outer packaging material as recited in claim 1 ,
wherein the polyamide film layer is 2.5% to 6% in a hot water shrinkage percentage in the MD and a hot water shrinkage percentage in the TD.
3. The laminated body for a power storage device outer packaging material as recited in claim 1 ,
wherein the polyamide film layer is
550 MPa to 700 MPa in a sum of the breaking strength in the MD and the breaking strength in the TD, and
90% to 200% in the breaking elongation in the MD and the breaking elongation in the TD.
4. The laminated body for a power storage device outer packaging material as recited in claim 1 ,
wherein the in-between base materials adhesive layer is 70 MPa to 400 MPa in a Young's modulus, 20 MPa to 70 MPa in breaking strength, and 50% to 400% in breaking elongation.
5. The laminated body for a power storage device outer packaging material as recited in claim 4 ,
wherein the in-between base materials adhesive layer is composed of a cured material of an adhesive agent, the adhesive agent including,
as a main agent, one or two or more types of resins selected from the group consisting of a polyurethane-based resin, a polyester polyurethane-based resin, a polyether polyurethane-based resin, a polyether-based resin, and a polyester-based resin, and
as a curing agent, a multifunctional isocyanate.
6. The laminated body for a power storage device outer packaging material as recited in claim 2 ,
wherein the polyamide film layer is
550 MPa to 700 MPa in a sum of the breaking strength in the MD and the breaking strength in the TD, and
90% to 200% in the breaking elongation in the MD and the breaking elongation in the TD.
7. The laminated body for a power storage device outer packaging material as recited in claim 2 ,
wherein the in-between base materials adhesive layer is 70 MPa to 400 MPa in a Young's modulus, 20 MPa to 70 MPa in breaking strength, and 50% to 400% in breaking elongation.
8. The laminated body for a power storage device outer packaging material as recited in claim 3 ,
wherein the in-between base materials adhesive layer is 70 MPa to 400 MPa in a Young's modulus, 20 MPa to 70 MPa in breaking strength, and 50% to 400% in breaking elongation.
9. The laminated body for a power storage device outer packaging material as recited in claim 6 ,
wherein the in-between base materials adhesive layer is 70 MPa to 400 MPa in a Young's modulus, 20 MPa to 70 MPa in breaking strength, and 50% to 400% in breaking elongation.
10. The laminated body for a power storage device outer packaging material as recited in claim 7 ,
wherein the in-between base materials adhesive layer is composed of a cured material of an adhesive agent, the adhesive agent including,
as a main agent, one or two or more types of resins selected from the group consisting of a polyurethane-based resin, a polyester polyurethane-based resin, a polyether polyurethane-based resin, a polyether-based resin, and a polyester-based resin, and
as a curing agent, a multifunctional isocyanate.
11. The laminated body for a power storage device outer packaging material as recited in claim 8 ,
wherein the in-between base materials adhesive layer is composed of a cured material of an adhesive agent, the adhesive agent including,
as a main agent, one or two or more types of resins selected from the group consisting of a polyurethane-based resin, a polyester polyurethane-based resin, a polyether polyurethane-based resin, a polyether-based resin, and a polyester-based resin, and
as a curing agent, a multifunctional isocyanate.
12. The laminated body for a power storage device outer packaging material as recited in claim 9 ,
wherein the in-between base materials adhesive layer is composed of a cured material of an adhesive agent, the adhesive agent including,
as a main agent, one or two or more types of resins selected from the group consisting of a polyurethane-based resin, a polyester polyurethane-based resin, a polyether polyurethane-based resin, a polyether-based resin, and a polyester-based resin, and
as a curing agent, a multifunctional isocyanate.
13. The laminated body for a power storage device outer packaging material as recited in claim 1 ,
wherein the polyester film layer constitutes an outermost layer of the laminated body for a power storage device outer packaging material.
14. The laminated body for a power storage device outer packaging material as recited in claim 1 ,
wherein the in-between base materials adhesive layer is laminated between the polyamide film layer and the polyester film layer that constitutes an outermost layer of the laminated body for a power storage device outer packaging material.
15. The laminated body for a power storage device outer packaging material as recited in claim 1 ,
wherein the sealant layer is laminated on the inner side surface of the barrier layer via a first adhesive layer.
16. The laminated body for a power storage device outer packaging material as recited in claim 15 ,
wherein the base material layer is laminated on the outer side surface of the barrier layer via a second adhesive layer.
17. The laminated body for a power storage device outer packaging material as recited in claim 16 ,
wherein the second adhesive layer is a urethane-based adhesive agent, an epoxy-based adhesive agent, or an acrylic-based adhesive agent.
18. The laminated body for a power storage device outer packaging material as recited in claim 17 ,
wherein the second adhesive layer has a thickness of 1 μm to 5 μm.