COEXTRUDED, CROSSLINKED MULTILAYER POLYOLEFIN FOAM STRUCTURES FROM RECYCLED POLYOLEFIN FOAM MATERIAL AND METHODS OF MAKING THE SAME

摘要

A physically crosslinked, closed cell continuous multilayer foam structure comprising at least one polypropylene/polyethylene coextruded foam layer is obtained. The multilayer foam structure is obtained by coextruding a multilayer structure comprising at least one foam composition layer, irradiating the coextruded structure with ionizing radiation, and continuously foaming the irradiated structure.

主权项

1. A method of forming a multilayer structure comprising:
coextruding:
a first layer comprising:
polypropylene or polyethylene; anda first chemical foaming agent; anda second layer on a side of the first layer, the second layer comprising:
5-50 wt. % recycled, crosslinked polyolefin foam material;50-95 wt. % polypropylene, polyethylene, or a combination of polypropylene and polyethylene; anda second chemical foaming agent.