MATERIALS / RECYCLING 19 PETplanet Insider Vol. 23 Clearly it is possible to colour the bottle, thus masking the effect of the masterbatch. (Fig. 2) The additive is potentially a suitable and efficient alternative solution to the heat set technology, for food and aerosol application. In addition, FastPET could be used for the production of refillable and returnable PET bottles, because they can be washed safely in any dishwasher. To conclude, the main advantages given by the additive according to GS4Plastic are: Suitable for usage with 100% rPET Increase in the oxygen barrier properties, so to achieve a shelf life of up to 12 months Increase the thermal properties of PET up to 88 °C (dishwasher safe) Reduced investments in machinery and mould for hot fill Reduction of cycle time Food grade approved. www.gs4plastic.com Fig 2 The masterbatch acts on the crystallinity of PET, and a slight loss of optical properties is therefore to be expected. It is possible to colour the bottle, thus masking the effect of the masterbatch.
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