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Technology , Sustainability


Avantgarde in circular economy: PET preforms from 100% recycled flakes

Schermata 2020-03-22 alle 19.37.59

SIPA’s Xtreme Renew by SIPA is the first circular system in the world that produces preforms and bottles while saving the environment, energy and money.

SIPA, in partnership with EREMA, has developed XTREME RENEW, the first technology in the world to produce PREFORMS from 100% r-PET washed FLAKES in a single energy cycle.

An environment-saving and cost reducing technology, this revolutionary “bottle-to-bottle” system was designed for the circular economy: XTREME RENEW.

  • Uses fewer raw material (-10%),
  • saves more energy (-30%),
  • Has a low TCO (-15%)
  • Reduces logistic cost (-20%) compared to any other technology.

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Xtreme Renew main advantages


  • Production of preforms containing up to 100% rPET from simply washed flake to food-grade PET with virgin-like quality
  • Major process simplification
  • Safe and approved process (FDA, Efsa, Invima, Anvisa, …)
  • Top preform quality: IV stability, top colour values, clear preforms, food-contact compliant
  • Sustainable process, from waste to resources
  • Up to 15% lower TCO (Total Cost of Ownership) vs. traditional recycling concept
  • Major energy savings (30%) vs. traditional recycling concept
  • Up to 20% reduction in logistics/warehouse vs. traditional recycling concept


READ THIS CASE HISTORY: "From used to new 100% rPET bottles: SIPA Xtreme Renew for Kyoei Industries"


Main features of the decontamination process


One of the key benefits of the patented VACUREMA® technology from EREMA is that decontamination and the removal of moisture already takes place BEFORE the extrusion.

This is a clear bonus for the quality of the melt and, as a result, of the end product, because IV values are very stable as a guarantee of top mechanical properties of the finished product.

The key components of the system include a vacuum reactor which is connected directly to a single-screw extruder.

Thanks to the ingenious function of the mixers in the vacuum reactor they feature three ultra-efficient function zones which interact perfectly with each other to decontaminate and predry the PET material.


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Extrusion process


With very low residual moisture the clean, perfectly prepared PET material enters the intake zone of the extruder.

This material transfer takes place under high vacuum. As a result, no additional degassing ports are required on the extruder.

This means that VACUREMA® technology drastically reduces the length of the extruder, lowers its energy consumption, improves the colour values (b value) of the processed material and keeps AA values to low level.

Moreover, the strong homogenisation performance of the extruder plays a significant part in turning the different input IV values into a stable output IV value.


Filtration process


In the downstream large-area high-performance fine filter, the material is filtered with a mesh screen width of 25 – 62 µm (typically with 40 µm, depending on the end application: CSD, water, etc.)

The filter system is equipped with a patented fully automatic self-cleaning system that enables long filter service life.

The melt is now ready and can be transferred directly to the downstream unit.


Rotary injection-compression process

Rotary molding wheel:

  • Modular design of the wheel and of the press module
  • Reduced cavity tonnage for reduced mold wear (max 2 ton)
  • Mold safety: intrinsic protection; each mold can be remain open
  • Easy maintenance: each module press can be fast removed (20 minutes per station)
  • The use of single cavity dosimeter allows the simultaneous production of 2 different preforms
  • Preforms exit aligned, so can be sorted in different bins


Preforms post-mold cooling process


Cooling is made with cold air at high speed on external and internal surface of the preform.

There is no need to change the personalization parts since grippers are self-adjustable.


Xtreme Renew applications


XTREME RENEW produce a wide range of light weighted food-grade preforms with up to 100% r-PET starting from simply washed flakes for a wide range of applications: mineral water, juices, RTD tea, milk, edible oil, etc.


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Written by SIPA

With 30 years of experience in PET containers solutions, SIPA has acquired considerable expertise in all available bottle manufacturing and filling technologies, from preforms to finished products, for the food and beverage, chemical products, cosmetics, detergents and pharmaceutical sectors.