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In VACUNITE, EREMA brings together its VACUREMA technology with the newly patented, vaccumm-supported nitrogen SSP from Polymetrix. (Photo: EREMA)
In VACUNITE, EREMA brings together its VACUREMA technology with the newly patented, vaccumm-supported nitrogen SSP from Polymetrix. (Photo: EREMA)

EREMA has expanded its portfolio for PET recycling solutions with the new innovative VACUNITE technology. This new technology brings together the company’s VACUREMA bottle-to-bottle process with newly patented, vacuum-supported solid state polycondensation (SSP) from Polymetrix.

The Austrian producer of plastics recycling machines presented this newly developed VACUNITE technology at the PETnology conference in Paris.

This combination is so special because all thermal process steps take place in nitrogen atmosphere. The result is rPET pellets which are unique in quality and far exceed all food-contact requirements.

According to EREMA, VACUNITE is the answer to the challenges which PET recycling will have to face in the future.

“The growing commitment in society to handling plastics in a responsible way means that both political requirements and voluntary pledges of major beverage brands call for a significant increase in the amount of recyclate in end products,” said Christoph Wöss, EREMA Business Development Manager for the bottle sector.
In VACUNITE, EREMA brings together its VACUREMA technology with the newly patented, vaccumm-supported nitrogen SSP from Polymetrix. (Photo: EREMA)
“To fulfil these requirements, even more material in general and with varying quality due to different collection systems has to be recycled while, at the same time, the big brands are becoming even stricter with their requirements regarding the recyclates produced,” he remarked.

Advanced technologies in one plant

The focus of the next development of the PET recycling technology was on improving quality even further.

The process is based on the combination of proven VACUREMA technology which has been enhanced for this application and the newly patented, vacuum-supported nitrogen SSP from Polymetrix.

All thermal process stages take place in nitrogen atmosphere, largely eliminating flake and pellet discoloration and reliably removing additives which could lead to undesired reactions in the melt.
Christoph Wöss presented the VACUNITE at the PETnology conference. (Photo: PETnology)
Another benefit of VACUNITE is that the vacuum support cleans the nitrogen which means it can be returned to the previous processing stage and nitrogen consumption is reduced as a result. Any remaining dust particles are removed from the pellets before filling to avoid preform contamination.

“Using vacuum support and nitrogen atmosphere creates rPET recyclates which far exceed all existing food contact requirements, even those of the major beverage brands,” explained Christoph Wöss.

Apart from the exceptional quality of the output material, VACUNITE also stands out through its comparatively compact build, low energy consumption, and considerably lower maintenance compared to vacuum SSP systems.

As introduced, depending on machine type, 50-60sqm of floor space is sufficient for the SSP part. The height and substructure also have less impact on the dimensions of the plant building compared to other SSPs. The energy consumption of VACUNITE for the entire production process from the flake to the final pellets amounts to a mere 0.35 kWh per kg.

“With VACUNITE we offer our bottle-to-bottle customers a new technology in addition to the existing portfolio which sets new standards at all levels from technical performance to rPET quality,” concluded Manfred Hackl, CEO EREMA Group.

A first customer in Europe has already decided to invest in a VACUNITE recycling plant prior to the official product launch, he added.

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