Patent ID: 7223461

Claim:
An inflatable cellular cushioning article having a plurality of inflatable chambers with each chamber comprising a plurality of inflatable cells connected in series with one another, the article being made from a first multilayer film having a unit weight of from 20 to 250 grams per square meter sealed to itself or a second film having a unit weight of from 20 to 250 grams per square meter, wherein the first and second films each comprise an outer seal layer, a gas barrier layer, and a tie layer between the seal layer and the gas barrier layer, with the tie layer comprising an anhydride modified olefin polymer containing anhydride at a level of at least 150 ppm, based on the weight of the modified olefin polymer, wherein the gas barrier layer consists essentially of at least one barrier polymer selected from the group consisting of polyamide, hydrolyzed ethylene/vinyl acetate copolymer, polyacrylonitrile, and polycycloolefin, with the at least one barrier polymer comprising polymer which crystallizes upon aging and the inflatable cellular cushioning product has been aged for a temperature and time to ensure that the crystallinity of the polymer in the in the gas barrier layer is substantially complete.