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US 7,037,576 B2Granted
Polyester or copolyester/polyolefin laminate structures and methods of making the same
AssigneeEastman Chemical Company
InventorsJohn Edward Christopher Willham, Thomas Joseph Pecorini
Life of this patent
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Abstract
The invention relates to polyester/polyolefin laminate materials having improved properties. The invention also relates to copolyester/polyolefin laminate materials having improved properties. The laminates herein exhibit improved results in flammability studies. The invention further relates to methods of making laminate structures.
Claims16
A polyester or copolyester/polyolefin laminate comprising:
- a) a first polymer layer comprising a polyester or a copolyester, wherein the first polymer layer has an inner and an outer surface, and a thickness of from about 0.080 inches to about 0.250 inches;
- b) a tie layer comprising consisting essentially of an alkyl acrylate copolymer having a first surface and a second surface, wherein the first surface is adjacent to the inner surface of the first polymer layer;
- and
- c) a second polymer layer comprising a polyolefin, wherein the second polymer layer has an inner and an outer surface, and wherein the second surface of the tie layer is adjacent to the inner surface of the second polymer layer.
1 more element
A process for making a laminate, the process comprising:
- a) providing a first polymer layer comprising a polyester or copolyester, wherein the first polymer layer has an inner and an outer surface, and a thickness of from about 0.080 inches to about 0.250 inches;
- b) providing a tie layer comprising consisting essentially of an alkyl acrylate polymer, wherein the tie layer has a first and a second surface;
- c) providing a second polymer layer comprising a polyolefin, wherein the second polymer layer has an inner and an outer surface;
- d) applying the tie layer to one or more of the inner surface of the first polymer layer or the inner surface of the second polymer layer and bringing the first and second polymer layers into proximal contact with each other, wherein the tie layer is situated between the first and second polymer layers, thereby providing a pre-laminate;
- and
- e) applying sufficient heat and/or pressure to the pre-laminate to provide a laminate material.
3 more elements
Dependencies are inferred from the claim text.