Electricity storage device cladding
AssigneeToppan Printing Co., Ltd.
InventorsJunya Imamoto, Yu Ogihara, Masayoshi Suzuta
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Abstract
A packaging material for a power storage device, comprising at least: a substrate layer; a metallic foil layer with an anti-corrosion treatment layer being disposed on one face or both faces thereof; and a sealant layer in this order, wherein a sealant layer includes a resin layer containing a polypropylene-based resin (A) and an incompatible component (B) incompatible with a polypropylene-based resin (A), and as for loss tangent tan δ obtained by dynamic viscoelasticity measurement at a frequency of 1.0 Hz, the sealant layer has a maximal value of tan δ at −30 to 30° C., and in addition, a ratio (II/I) of the maximal value (II) of tan δ at −30 to 30° C. to a value (1) of tan δ at −50° C. is 2.50 or more.
Claims9
A packaging material for a power storage device, comprising:
- a substrate layer;
- a metallic foil layer with an anti-corrosion treatment layer on one face or both faces thereof;
- and
- a sealant layer,
- in this order, wherein
- the sealant layer includes a resin layer containing a polypropylene-based resin (A) and an incompatible component (B) incompatible with the polypropylene-based resin (A),
- the sealant layer has a value (I) of loss tangent tan δ at −50° C. and a maximal value (II) of loss tangent tan δ at −30° C. to 30° C. determined by dynamic viscoelasticity measurement at a frequency of 1.0 Hz, and a ratio (II/I) of the maximal value (II) to the value (I) is 2.50 or more.
Dependencies are inferred from the claim text.