Chemically-resistant barrier film
AssigneeBemis Company, Inc.
InventorsLyndsey A. McMillan, Miriam B. Berbert
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Abstract
The present invention is directed to a laminate having a first exterior surface and a second exterior surface, the laminate includes a first layer comprising a heat sealable material, a second layer comprising a cyclic olefin copolymer, a third layer comprising a metallic foil or metallized polymer material, and a fourth layer comprising a thermoplastic film or paper. The laminate provides high oxygen and/or moisture barrier properties and can withstand the corrosive effects of products containing solvents, halogens or strong acids and bases.
Claims21
A flexible chemically-resistant barrier laminate for packaging a product, the laminate having a first exterior surface and a second exterior surface, the laminate comprising:
- a first layer comprising a heat sealable material;
- wherein the first layer forms the first exterior surface of the laminate;
- a second layer comprising a cyclic olefin copolymer;
- a third layer comprising metallic foil or metallized polymer material;
- wherein the second layer is positioned between the first and third layers;
- a fourth layer comprising a thermoplastic film or paper;
- wherein the fourth layer forms the second exterior surface of the laminate;
- and
- wherein the laminate has a bending resistance of between 51.4 and 177 Gurley Units (0.50 and 1.74 mNewton) in either the machine or transverse direction.
Dependencies are inferred from the claim text.