Paperboard with polyethylene terephthalate (PET) coating is suitable for packaging applications where the temperature resistance and fat barrier are important. It is amorphous at delivery and sealable.
At temperatures around 70°C it is transformed successively to a partly crystalline state with a melting point of approximately 260°C. This means that the heat sealing properties of the package will deteriorate when heated. It can be used for food products that are cooked in the pack and/or reheated in a microwave or conventional oven.
It is suitable for cooking/reheating in the tray and for lids. A black pigmented version is also available.