Polyethylene terephthalate (PET) has become the most favourable packaging material world-wide for beverages. The reason for this development is the excellent material properties of the PET material, especially its unbreakability and the very low weight of the bottles compared to glass bottles of the same filling volume. Nowadays, PET bottles are used for softdrinks, mineral water, energy drinks, ice teas as well as for more sensitive beverages like beer, wine and juices. For a long time, however, a bottle-to-bottle recycling of post-consumer PET packaging materials was not possible, because of the lack of knowledge about contamination of packaging polymers during first use or recollection. In addition, the decontamination efficiencies of recycling processes were in most cases unknown. During the last 20 years, PET recollection as well as recycling processes made a huge progress. Today, sophisticated decontamination processes, so-called super-clean recycling processes, are available for PET, which are able to decontaminate post-consumer contaminants to concentration levels of virgin PET materials. In the 1991, the first food contact approval of post-consumer PET in direct food contact applications has been given for post-consumer recycled PET in the USA. Now, 20 years after the first food approval of a PET super-clean recycling process, this article gives an overview over the world-wide progress of the bottle-to-bottle recycling of PET beverage bottles, e.g. the recollection amount of post-consumer PET bottles and the super-clean recycling technologies.

IN THIS COURSE YOU WILL LEARN:

• circular economy - from waste to ready product
• common used plastics which can be recyclable and their properities PE, PP, PS, PVC, PET, PS
• recycling of post consumer PET bottles
• extrusion of PET
• G-PET
• A-PET
• R-PET
• procesing of PET - G-PET, A-PET, R-PET
• methods of processing of plastics - extrusion, injection molding, blow molding, thermoforming
• regranulation, compounding of PET
• extrusion of PET films
• injection molding of PET and blow molding of bottles from R-PET
• extruders single and double screw
• screws and barrels
• single and double degassing in PET extrusion lines

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Rolbatch offers sollutions for PET recycling

• washing lines - shrederring, washing, drying
• sterylisation and decontamination
• regranulation of PET
• extrusion of PET films and sheets
• colour sorting of PET bottle flakes
• separation of PET from PE, metal, etc
• laboratory oven for testing inpurity of PET (ppm)
• plastometers for MFI / MFR / MVR testing

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