| abstract |
This adhesive agent is used for forming a removable adhesive agent layer included in a packaging material having layered therein a base material 1 that has a plastic layer and a printed layer, the removable adhesive agent layer, and a sealant base material 2, in this order from the outer side. The sealant base material 2 is recycled by removing the base material 1. The adhesive agent has an acid value of 5-40 mgKOH/g and contains a polyester polyol component and at least one polyisocyanate component selected from the group consisting of aliphatic polyisocyanates and aromatic aliphatic polyisocyanates. |