Rollprint's ClearFoil Film

With ordinary packaging resins such as polyethylene, polypropylene, and polyester, the barrier properties are not always sufficient to guarantee the shelf life of the product. In order to reduce the transmission of oxygen and moisture through the packaging, it may be necessary to co-extrude or apply a barrier material in order to be able to provide the necessary protection.

Although aluminum foil is widely used as a barrier material, aluminum foil does not always fully meet the integrated needs of the packaging, especially when the primary concern is transparency. Coating is a typical low-cost operation, so multilayer coating films often also have a cost advantage.

Rollprint's ClearFoil film uses a transparent foil with an oxygen scavenger. The result is a transparent material that allows consumers to see the product. Its barrier properties are equivalent to or better than those of thin aluminum foils. It remained below 1% for more than one year.

Another non-aluminum lidstock under development is designed to replace aluminum foil lids on yoghurt cups. This printed, multi-layered polyolefin material exhibits better flatness and tightness and is easier to tear off the cup.

Non-aluminum foil can also benefit from co-extrusion coating. Rollprint's IR300, a low-cost, is designed to hold difficult-to-preserve liquid packaging materials such as iodine. From paper/polyethylene/foil paper was formed by co-extrusion plus a polyester sealing layer. The polyester layer is not just a seal, it also protects the foil from the chemicals in the product.