Co-extruded, biaxially oriented, matte, HDPE films
Disclosed are compositions and methods for multilayer films, which, in one embodiment may comprise a core layer comprising at least 50 wt. % of high-density polyethylene. Further, the multilayer film may include a first skin layer comprising, consisting essentially of, or consisting of low-density polyethylene, optionally linear, and at least about 80 wt. % of high-density polyethylene, as well as a second skin layer comprising either: (i) one or more low-density polyethylenes, any or all of them optionally being linear; or (ii) one or more polypropylene-based copolymers. The multilayer film may be oriented in at least one direction.
1. A multilayer film comprising:
a core layer comprising at least about 50 wt. % of high-density polyethylene;
a first skin layer comprising of low-density polyethylene and at least about 80 wt. % of high-density polyethylene; and
a second skin layer comprising either: (i) one or more low-density polyethylenes; or (ii) one or more polypropylene-based copolymers,
wherein the multilayer film is biaxially oriented.
2. The multilayer film of claim 1 , further comprising one or more additives.
3. The multilayer film of claim 1 , further comprising one or more tie layers.
4. The multilayer film of claim 3 , wherein at least one layer in the multilayer film is matte.
5. The multilayer film of claim 3 , wherein at least one of the one or more tie layers comprise at least one olefin block copolymer.
6. The multilayer film of claim 3 , wherein at least one of the one or more tie layers comprise at least one low-density polyethylene.
7. The multilayer film of claim 3 , wherein the one or more tie layers comprise high-density polyethylene.
8. The multilayer film of claim 3 , wherein the one or more tie layers comprise at least about 40 wt. % high-density polyethylene.
9. The multilayer film of claim 1 , wherein the core layer further comprises about 20 wt. % or less of linear, low-density polyethylene.
10. The multilayer film of claim 1 , wherein the first skin layer further comprises hydrocarbon resin.
11. The multilayer film of claim 1 , wherein the first skin layer further comprises wax.
12. The multilayer film of claim 1 , wherein the first skin layer further comprises hydrocarbon resin, polyethylene polymer, cyclic olefin copolymer, wax or combination thereof.
13. The multilayer film of claim 1 , wherein at least one of the one or more low-density polyethylenes and/or the low-density polyethylene is metallocene-catalyzed.
14. The multilayer film of claim 1 , wherein at least one of the one or more low-density polyethylenes and/or the low-density polyethylene is linear.
15. The multilayer film of claim 1 , wherein the multilayer film is treated.
16. The multilayer film of claim 1 , wherein the multilayer film is metallized.
17. The multilayer film of claim 1 , wherein the multilayer film is coated.
18. The multilayer film of claim 1 , wherein the first skin layer is laminated to a polyethylene film.
19. The multilayer film of claim 1 , wherein the first skin layer further comprises an antiblock agent, optionally within a masterbatch solution.
20. The multilayer film of claim 1 , wherein at least two layers of the multilayer film are coextruded.