| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a packaging material for batteries by which a high bonding strength can be maintained even after a high-temperature and high-humidity long-term endurance test, and of which the mold is superior in durability.SOLUTION: A packaging material for batteries has an exterior layer-side resin film layer (11), an exterior layer-side adhesive layer (12), a metal foil layer (13), an interior layer-side adhesive layer (14), and a heat seal layer (15), which are laminated in turn. The exterior layer-side adhesive layer (12) is formed from a polyurethane adhesive agent containing a polyol component (A) and a polyisocyanate component (B). The polyol component (A) includes, 100 mol% of polybasic acid components: a particular amount of polyester polyol (A1) having a particular number-average molecular weight and including polybasic acid components including aromatic polybasic acid components and polyhydric alcohol components; and a particular amount of alcohol having a functionality of 3 or more. The polyol (A) includes 0.5-10 moles of an isocyanate group to a total of one mole of a hydroxyl group and a carboxyl group.</p> |
