Patent ID: 8287991

Claim:
A method of making a laminated article, the method comprising: (a) providing a first layer and a second layer, each layer independently comprising a copolyester layer wherein at least one the layers further comprises a branching agent, (b) providing an inclusion between the first and second layer, (c) applying pressure ranging from about 20 to about 400 psig at a temperature ranging from about 20Â° C. to about 80Â° C. above the glass transition (Tg) of at least one layer of the copolyester, wherein the temperature at an interface of the first layer and the second layer is equal to or greater than the Tg of at least one of the first layer and the second layer and the temperature is maintained for a period of time sufficient ranging from about 0.5 to 4 minutes and a pressure ranging from about 30 to 250 psig to form the laminated article, wherein the copolyester has an inherent viscosity (IV) ranging from about 0.5 to about 1.2 dL/g, when measured at 25Â° C. using 0.50 grams of polymer per 100 mL of a solvent consisting of 60 weight percent phenol and 40 weight percent tetrachloroethane, and wherein during the lamination, the reduction in flow of the first layer and the second layer, as measured by the change of area of the of the first and second copolyester layers with the branching agent relative to the same first and second copolyster layers without the branching agent, is more than about 15%.