| 摘要 |
A laminate structure includes an internal layer of foamed polymer. The foamed polymer replaces a paperboard layer used in prior laminate structures. Built upon the foamed polymer are three layers of low density polyethylene (LDPE), a layer of aluminum foil, and a tie layer. The foamed polymer may be polyethylene terephthalate (PET), polypropylene, high density polyethylene HDPE, LDPE, polystyrene, compositions comprising any of these polymers, or any other suitable foamed polymer compositions. The first LDPE layer coats a first surface of the foamed polymer, and the second LDPE layer coats a second surface of the foamed polymer. The aluminum foil layer is applied atop the second LDPE layer. The exposed surface of the aluminum foil is then coated with the tie layer, which is then topped with a third layer of LDPE. A non-polar homogeneous heat seal may be created at a temperature ranging from 250° F. to 500° F.
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