| abstract |
A container is manufactured from a material which comprises a polyethylene terephthalate (PET) copolymer and a nucleating agent, wherein the copolymer comprises at least 90 mol% polyethylene terephthalate monomer units. The container may be a foodstuff container, such as a dual ovenable tray which is stable at temperatures found in conventional ovens. Moreover, the container may be made from at least 20 weight%, and more preferably at least 80 weight%, recycled PET based on the total PET in the container. The nucleating agent can be an organic nucleating agent, preferably a carboxylic acid. The nucleating agent may be a salt, preferably a salt of an acid. In addition to PET, the copolymer contains at least one other monomer unit, wherein the other monomer unit may be derived from isophthalic acid, cyclohexane dimethanol, neopentyl glycol and diethylene glycol. In another aspect a method of manufacturing the container is disclosed. |