Patent ID: 6677048
Filing Date: 2004-01-13
Classification: B32B,B65D,Y02A,Y02W,Y10T

Abstract:
A lid structure for a food packaging container, comprising a paper-based body layer and, on a side that is against the packaging container, plastic layers that function as a barrier and as heat-sealable layers, wherein the plastic layers comprise, as the plastic layers that are attached to the body layer, one or more layers of biodegradable plastic selected from the group consisting of polylactide, polyhydroxy alkanoate, and a mixture thereof, and on their outer side an outermost layer which is formed of biodegradable ester copolymer, to whose ester parts a comonomer has been linked by ester or amino bonds, wherein the biodegradable ester copolymer is a biodegradable polyester amide.