Flexible multilayer film
The present disclosure provides a flexible multilayer film. The flexible multilayer film includes at least three layers. One of the layers is a seal layer and one of the layers is a barrier layer. The seal layer is an ionomer. The backing layer is in direct contact with the seal layer. The backing layer is an ethylene/α-olefin multi-block copolymer.
1. A flexible multilayer film comprising:
at least three layers
a seal layer comprising an ionomer, the seal layer is a surface layer;
a backing layer in direct contact with the seal layer, the backing layer comprising an ethylene/α-olefin multi-block copolymer consisting of (i) ethylene and (ii) a C 4 -C 8 α-olefin comonomer.
2. The flexible multilayer film of claim 1 wherein the ionomer is a metal ionomer.
3. The flexible multilayer film of claim 1 wherein the seal layer has a thickness from 1 micron to 30 microns.
4. The flexible multilayer film of claim 1 wherein the ethylene/α-olefin multi-block copolymer consists of ethylene monomer and a C 4 -C 8 α-olefin comonomer.
5. The flexible multilayer film of claim 1 , wherein the backing layer has a thickness from 1 micron to 30 microns.
6. The flexible multilayer film of claim 1 comprising a tie layer in direct contact with the backing layer.
7. The flexible multilayer film of claim 6 comprising a barrier layer in direct contact with the tie layer.
8. The flexible multilayer film of claim 7 wherein the barrier layer comprises at least one member selected from the group consisting of ethylene/vinyl acetate copolymer, polyvinylidene chloride, and polyamide.
9. A flexible pouch comprising:
opposing flexible multilayer films, the flexible multilayer films defining a common peripheral edge, each flexible multilayer film comprising;
at least three layers
a seal layer comprising an ionomer, the seal layer is a surface layer;
a backing layer in direct contact with the seal layer, the backing layer comprising an ethylene/α-olefin multi-block copolymer consisting of (i) ethylene and (ii) a C 4 -C 8 α-olefin comonomer; and
a peripheral seal extending along at least a portion of the common peripheral edge, the peripheral seal forming a closed flexible pouch having a storage compartment.
10. The flexible pouch of claim 9 wherein the peripheral seal comprises opposing seal layers of each flexible multilayer film in direct contact with each other, the peripheral seal having a seal strength from 9 N/25.4 mm to 25 N/25.4 mm as measured in accordance with ASTM F 88.
11. The flexible pouch of claim 9 comprising
a comestible in the storage compartment, the comestible in direct contact with the opposing seal layers.
12. The flexible pouch of claim 9 wherein the ionomer is a metal ionomer.
13. The flexible pouch of claim 9 wherein the ethylene/α-olefin multi-block copolymer consists of ethylene monomer and a C 4 -C 8 α-olefin comonomer.
14. The flexible pouch of claim 9 wherein the seal layer has a thickness from 8 microns to 15 microns.
15. The flexible pouch of claim 9 , wherein the backing layer has a thickness from 1 micron to 30 microns.