Barrier laminates including ethylene copolymer extruded web layers
AssigneeDow Global Technologies LLC
InventorsEdward L. Lee, Hwee Tatz Thai, Wu Aik Yee, Hwee Lun Goh
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Abstract
Provided are laminates including polyethylene and an extruded web layer. The laminates can be adhesiveless and fully compatible with polyethylene recycling streams. They can exhibit improved, maintained, or desirable properties in comparison to existing laminate structures that are not fully compatible with polyethylene recycling streams. The laminate comprises a first film, an extruded web layer, and a second film, where the extruded web layer is between the first film and a lamination layer of the second film and the laminate is formed via extrusion lamination of the extruded web layer.
Claims12
A laminate comprising:
- (a) a first film comprising at least 95 wt. % polyethylene;
- (b) a second film comprising:
- (i) a lamination layer comprising an ethylene copolymer selected from the group consisting of an ethylene/vinyl acetate copolymer, ethylene/acrylic acid copolymer, ethylene/acrylate copolymer, anhydride-modified ethylene/acrylate copolymer, anhydride-modified polyethylene, anhydride-modified ethylene/vinyl acetate copolymer, polyethylene elastomer/plastomer, and combinations thereof;
- (ii) a sealant layer, wherein the sealant layer comprises at least 70 wt. % of a polymer having a highest peak melting temperature (Tm) of 102° C. or less and wherein the polymer is an ionomer of ethylene acid copolymer, or a polyethylene elastomer/plastomer;
- (iii) a barrier layer comprising an ethylene vinyl alcohol copolymer;
- (iv) a first tie layer between the lamination layer and the barrier layer;
- and
- (v) a second tie layer between the barrier layer and the sealant layer;
- and
- (c) an extruded web layer adhering the lamination layer of the second film to the first film, the extruded web layer comprising at least one of an ethylene/methyl acrylate copolymer, ethylene/butyl acrylate copolymer, ethylene/ethyl acrylate copolymer, ethylene/vinyl trimethoxy silane copolymer, ethylene/vinyl acetate copolymer, ethylene/acrylic acid copolymer, ethylene/methacrylic acid copolymer, maleic anhydride-modified polyethylene, ethylene-acid terpolymer, or ethylene/methacrylic acid/acrylate terpolymer.
Dependencies are inferred from the claim text.