Metallizable white opaque films, metallized films made therefrom and labels made from the metallized films
A multilayer, metallizable, white opaque film suitable for use in forming metallized plastic labels for bottles and other containers includes at least a internal core layer and opposed outer skin layers. One of the outer skin layers is a non-voided layer having a surface treated to receive a metal layer thereon and the opposed outer skin layer includes an amount of a void creating additive to provide sufficient porosity for the absorption of an aqueous cold glue adhesive of the type employed to adhere a label to a container. Preferably the core layer is free of void creating additives and the opposed outer skin layer for receiving the cold glue adhesive is oxidatively treated, e.g., corona treated, to improve receptivity for the cold glue adhesive.
1. A multilayer, metallized white opaque, plastic label including at least an internal core layer and opposed outer skin layers thinner than said core layer, one of said outer skin layers being a non-voided layer having an outer surface thereof oxidatively treated to receive a metal layer thereon, the opposed outer skin layer including at least 25% to about 50% by weight, based upon the weight of said opposed outer skin layer, of a void creating additive, an aqueous cold glue adhesive of the type employed to adhere the label to a container on said opposed outer skin layer and a metal layer on the outer surface of said one of said outer skin layers.
2. The label of claim 1 , wherein said void creating additive is calcium carbonate.
3. The label of claim 1 , wherein said internal core layer is free of void creating additives.
4. The label of claim 1 , wherein the outer skin layer including a metal layer thereon has a thickness of approximately 20 gauge or less; said core layer has a thickness of approximately 200 gauge and said opposed outer skin layer has a thickness of about 15–25 gauge.
5. The label of claim 1 , including a biaxially oriented polyolefin film.
6. A white opaque plastic label including a first and second outer layer and a core layer between said outer layers, said outer layers being thinner than said core layer, said first outer layer including at least 25% to about 50% by weight, based on the weight of said first outer layer, of a void creating additive therein and an aqueous cold glue adhesive on an outer surface of said first outer layer for securing said label to a container, said second outer layer being free of a void creating additive and including a metal layer on an outer, exposed surface thereof.
7. The label of claim 6 , wherein said core layer is adhered to said first and second outer layers.
8. The label of claim 6 , wherein said void creating additive is calcium carbonate.
9. The label of claim 6 , wherein said core layer is free of a void-creating additive.