| 摘要 |
<p>This adhesive composition for use in plastic and metal foil composite packaging materials contains (A) polyester glycol having a molecular weight of 3,000 to 1000,000, polyester polyurethane polyol having a molecular weight of 3,000 to 100,000, or a mixture thereof; (B) a silane coupling agent; and (C) organic polyisocyanate, wherein the equivalent weight ratio (NCO/H) of the isocyanate group (NCO) to active hydrogen (H) is from 1 to 10. A packaging material making use of the present composition prevents the plastic film from peeling off the metal foil even when the sealed packaging filled with a food is treated in boiling water for sterilization. Such packaging exhibits excellent resistance to foods and permits their stable and long-term preservation. </p> |
