Packaging material for energy storage devices, packaging housing for energy storage devices and energy storage devices

摘要

A packaging material 1 for energy storage devices comprises a base material layer 2 made of a heat-resistant resin, a sealing layer 3 as an inner layer and a metal foil layer 4 disposed between the base material layer and the sealing layer. A protective layer 7 is laminated on a surface of the base material layer 2, which is opposite to one side of the metal foil layer. The protective layer 7 contains 40% by mass or more of a polyester resin formed of polyester polyol having a number average molecular weight of 5,000 to 50,000 independently of each other at least at both ends thereof having a hydroxyl group or a carboxyl group, and a multifunctional isocyanate curing agent containing at least one aliphatic polyfunctional isocyanate compound. With this configuration, a packaging material for energy storage devices can be provided which has excellent moldability, can ensure excellent printability on the surface, and has high solvent resistance.