The decisive criterion for all PET applications is that the use of repelletised material may not influence either extrusion or any following process, nor may it prejudice the quality of the end product. The Starlinger recoSTAR product line offers the ideal solution for PET recycling, as it fulfils both conditions with optimal pre-drying of the PET flakes and optional solid stating.

The recoSTAR PET line is state-of-the-art recycling technology for the in-house recycling of PET flakes from bottles, preforms, strapping bands and sheets as well as for the recycling of post-consumer bottle flakes after the washing process. The end product is melt-filtrated, uniform granulate that can be used for a wide range of applications (containers, sheets, fibers and nonwovens, strapping).

recoSTAR PET features the following advantages:

• Modular design ensures flexibility and adaptability to different input material and the changing requirements of rPET users.
• High automation and userfriendliness leads to highest efficiency and consequently fast ROI.
• Careful treatment of flakes, avoiding dust, high IV loss and degradation. FIFO ensures uniform treatment of the input material.
• Direct material flow at the melt filtration reduces stress of material. Finest filtration is available on request.
• The inline viscosimeter optionally measures the IV for immediate quality control.
• Pellets size and bulk density are adjustable for all pelletising systems available.
• The optional inline crystallisation after underwater pelletising ensures optimised foot-print, energy saving and high crystallinity.
• Increased energy efficiency by using gas, steam, or the residual heat of previous process steps.
• The visualisation panel features archiving, maintenance list, alarm list, etc.

The recoSTAR PET and recoSTAR PET HC (High Capacity) series comprises five different machine sizes which together cover an output range of 150 – 3.600 kg/h. By adding SSP reactors, the number of which will depend on the requirements of the application, the machine concept meets even the most stringent demands as to IV.

PET flakes are heated and dried in a two-stage process by means of hot air and optional dry air or under vacuum. The special design of the dryer outlet results in center flow prevention, consistent residence time and FIFO processing. This ensures ideal preparation for the extrusion process with maintained IV level or with IV increase. Once installed, the unit can be equipped with an SSP reactor before or after extrusion to increase the viscosity.

Установка утилизации recoSTAR PET выполняет следующие технологические операции:

1. Подающий шнек
2. Устройство сушки горячим воздухом
3. Предварительная сушка горячим воздухом
4. Экструдер
5. Экструдер с высоковакуумной дегазацией
6. Фильтр расплава без обратной промывки
7. Фильтр расплава с обратной промывкой
8. Стренговая грануляция
9. Автоматическая стренговая грануляция
10. Подводная грануляция
11. Подводный гранулятор с встроенной кристаллизации
    
    

необязательный: Кристаллизация и  твёрдотельная поликонденсация (12-18).

12. Кристаллизация / Докристаллизация
13. Вакуумный траспортер
14. Зона предварительного нагрева
15. Зона предварительного нагрева
16. Охлаждающее устройство / вакуумный шлюз
17. Энергопреобразователь
18. Накопительный бункер