Coated, oriented, linear, low-density, polyethylene films
Disclosed are biaxially oriented, multilayered films, wherein said films may include a core layer comprising linear, low-density polyethylene, and the core layer is optionally cavitated. Said films may further include a first skin layer on a first side of the core layer, and a second skin layer on a second side of the core layer, wherein the first skin layer and the second skin layer comprise thin layers of linear, low-density polyethylene of a same or different type. Further, said films may include an aqueous-based primer on an outer surface of the second skin layer, wherein the outer surface faces away from the core layer. Further still, said films may include a sealant coating layer on the first skin layer and a barrier coating layer on the second skin layer, wherein the sealant coating layer and the barrier coating layer are aqueous-based.
1. A biaxially oriented multilayered film comprising:
a core layer consisting essentially of metallocene, linear, low-density polyethylene, wherein the core layer is cavitated;
a first skin layer on a first side of the core layer, and a second skin layer on a second side of the core layer, wherein the first skin layer and the second skin layer each comprise linear, low-density polyethylene of a different type;
an aqueous-based primer on an outer surface of the second skin layer, wherein the aqueous-based primer comprises epoxy or poly(ethylene imine), wherein the outer surface faces away from the core layer;
an aqueous-based sealant coating on the first skin layer, wherein the aqueous-based sealant coating comprises ethylene acrylic acid or ethylene methyl acrylate polymer; and
an aqueous-based barrier coating on the aqueous-based primer on the second skin layer, wherein the aqueous-based barrier coating comprises vinyl alcohol polymer.
2. The biaxially oriented multilayered film of claim 1 , further comprising one or more additives.
3. The biaxially oriented multilayered film of claim 1 , wherein the first skin layer, the second skin layer, or both further comprise zeolite.
4. The biaxially oriented multilayered film of claim 1 , wherein the core layer is cavitated with ≤30 wt. % cavitating agents.
5. The biaxially oriented multilayered film of claim 1 , further comprising one or more surface treatments layers applied intermediate to: (a) the second skin layer and the barrier coating; (b) the barrier coating and a metallized layer; (c) the first skin layer and a primer adjacent to the sealant coating; (d) the first skin layer and the sealant coating; or (e) combinations thereof.
6. The biaxially oriented multilayered film of claim 1 , further comprising one or more printing and/or processing coatings located the outer surface of the sealant coating layer, the barrier coating layer, or both.
7. The biaxially oriented multilayered film of claim 1 , further comprising a primer applied to the outer surface of the first skin layer.
8. The biaxially oriented multilayered film of claim 1 , further comprising a metallized layer on to the barrier coating layer, wherein, optionally, the barrier coating is surface-treated.
9. The biaxially oriented multilayered film of claim 1 , wherein the aqueous-based barrier coating is an exterior layer.
10. The biaxially oriented multilayered film of claim 1 , wherein the aqueous-based barrier coating is located between the second skin layer and a metallized layer.
11. The biaxially oriented multilayered film of claim 1 , further comprising a metallized layer on the aqueous-based sealant coating.
12. The biaxially oriented multilayered film of claim 1 , wherein the aqueous-based barrier coating has a thickness from 0.5 μm through 2.5 μm.