Patent ID: 7632764
Filing Date: 2009-12-15
Classification: B32B,C08L,C09J,Y10T

Abstract:
1. An article comprising an ultrasonically bonded laminated structure, the laminated structure comprising a first material, a second material, and an adhesive composition, the adhesive composition comprising an atactic polymer and an isotactic polymer, wherein the atactic polymer is atactic polystyrene, the atactic polymer having a degree of crystallinity of about 20% or less and a number-average molecular weight of from about 1,000 to about 300,000 and the isotactic polymer having a degree of crystallinity of about 40% or more and a number-average molecular weight of from about 3,000 to about 200,000, wherein at least one of the first material and the second material is a cellulosic material, and wherein the first material and the second material are ultrasonically bonded together.