Multiple layer structures comprising a poly (vinylidene chloride) layer
View Patent ↗Multiple layer structures comprising one or more poly(vinylidene chloride) layers and containers made from the multiple layer structures are provided. In a general embodiment, the present disclosure provides a multiple layer structure comprising one or more PVDC layers comprising a component selected from the group consisting of a poly(vinylidene chloride), a poly(vinylidene chloride) copolymer, and combinations thereof. The multiple layer structure further comprises one or more tie layers attached to the PVDC layer. The tie layer comprises a component selected from the group consisting of (a) polyether polyester copolymers, (b) polyurethanes having a melting temperature above about 121° C., (c) a blend comprising a polyamide and an ethylene copolymer containing an amine reactive functional group, and combinations thereof.
1. A multiple layer structure comprising:
at least one PVDC layer comprising a component selected from the group consisting of a poly(vinylidene chloride), a poly(vinylidene chloride) copolymer, and combinations thereof; and
a tie layer attached to the PVDC layer, the tie layer comprising a blend of a polyamide and an epoxy-containing copolymer of ethylene with a component selected from the group consisting of vinyl acetate, methyl acrylate, methyl methacrylate, and acrylic acid.
2. The multiple layer structure of claim 1 , wherein the structure consists essentially of the PVDC layer and the tie layer.
3. The multiple layer structure of claim 1 further comprising a third layer disposed on a side of the PVDC layer remote from the tie layer, the third layer being substantially free of vinyl chloride containing polymers and being attached to the PVDC layer by a second tie layer.
4. The multiple layer structure of claim 1 , wherein the tie layer comprises a blend of a polyamide and an ethylene-methyl acrylate-glycidyl methacrylate terpolymer.
5. The multiple layer structure of claim 1 further comprising a second layer, the tie layer being disposed between the PVDC layer and the second layer.
6. The multiple layer structure of claim 5 , wherein the second layer is heat sealable.
7. The multiple layer structure of claim 5 , wherein the second layer comprises a polymer selected from the group consisting of polypropylene homopolymers, polypropylene copolymers, polyethylene copolymers, and combinations thereof.
8. The multiple layer structure of claim 1 further comprising a skin layer attached to the PVDC layer on a side thereof remote from the tie layer.
9. The multiple layer structure of claim 8 , wherein the skin layer comprises a polyester polyether copolymer.
10. A multiple layer structure comprising:
a skin layer;
a PVDC layer attached to the skin layer, the PVDC layer comprising a component selected from the group consisting of a poly(vinylidene chloride), a poly(vinylidene chloride) copolymer, and combinations thereof attached to the heat seal layer;
a tie layer attached to the PVDC layer, the tie layer comprising a blend of a polyamide and an epoxy-containing copolymer of ethylene with a component selected from the group consisting of vinyl acetate, methyl acrylate, methyl methacrylate, and acrylic acid; and
a heat seal layer attached to the tie layer.
11. A multiple layer structure having a first surface and a second surface, the multiple layer structure comprising:
a skin layer at the first surface of the structure;
a PVDC layer comprising a component selected from the group consisting of a poly(vinylidene chloride), a poly(vinylidene chloride) copolymer, and combinations thereof attached to the skin layer;
at least one tie layer attached to at least one side of the PVDC layer, the tie layer comprising a blend of a polyamide and an epoxy-containing copolymer of ethylene with a component selected from the group consisting of vinyl acetate, methyl acrylate, methyl methacrylate, and acrylic acid; and
a heat seal layer at the second surface that is opposite of the first surface.
12. The multiple layer structure of claim 11 comprising one tie layer attached to one side of the PVDC layer and one tie layer attached to an opposite side of the PVDC layer, the tie layers and the PVDC layer disposed between the skin layer and the heat seal layer.
13. The multiple layer structure of claim 11 comprising one tie layer attached to one side of the PVDC layer and two adjacent tie layers attached to an opposite side of the PVDC layer, the tie layers and the PVDC layer disposed between the skin layer and the heat seal layer.
14. The multiple layer structure of claim 11 comprising two adjacent tie layers attached to one side of the PVDC layer and two adjacent tie layers attached to an opposite side of the PVDC layer, the tie layers and the PVDC layer disposed between the skin layer and the heat seal layer.
15. A container comprising:
a body defined, in part, by a multiple layer film comprising at least one PVDC layer comprising a component selected from the group consisting of a poly(vinylidene chloride), a poly(vinylidene chloride) copolymer, and combinations thereof, and a tie layer attached to the PVDC layer, the tie layer comprising a blend of a polyamide and an epoxy-containing copolymer of ethylene with a component selected from the group consisting of vinyl acetate, methyl acrylate, methyl methacrylate, and acrylic acid.