FREQUENTLY ASKED QUESTIONS

The typical Erema cutter/compactor upstream of the extruder is capable of vaporising moisture of up to 8% ( in combination with the Erema TVE extruder design) before the material is fed into the extruder. The advanced "double disc design" cutter compactor of the 4 th generation Erema system can even handle ( and continuously evaporate) moisture levels of up to 20 (!) per cent. The energy used (friction heat) is a waste product from the cutting/reducing/prewarming energy which is required in the cutter/compactor in order to reduce the size of the material. With the Erema system, therefore, you can easily turn plastic materials with up to 20% moisture content into completely degassed pellets in one single pass.

Please contact our experts for further information or in order to arrange a demonstration / test with your material free of charge at Erema and see the benefits for yourself.

The Erema plant with the highest drying and degassing capacity:

Continue with TVEplus in double disc execution.

Erema has developed several patented technologies to solve this problem.

The patented Erema TVE extruder, for example, combines top degassing effects with the advantages of an extruder without degassing (no melt escape at the degassing openings of the extruder due to clogged filter screens).
Extruder cylinder and extruder screw can be supplied in extremely wear-resistant tungsten carbide versions.
Double filtration in one extrusion step is possible (coarse filtration/fine filtration)with the Erema TVE extruder system.

Highly efficient filter systems available to round off the solution:

For medium contaminated materials: Erema`s unique partial surface backflush screen changer (RTF series) with  fully automatic self-cleaning system. Suitable for separation of approx. up to 0,1 percent of solid contamination ( in weight) from plastic melt.

For severely contaminated materials: The unique Erema high performance filter system called "LF2/350 laser filter". A continuous , constant pressure melt filtration system with extreme contamination separation capacity. Suitable for continuous separation of up to approx. 2 % of solid contamination from plastic melt.

Please contact our experts for further information or in order to arrange a demonstration / test at Erema with your material free of charge to find out the benefits for yourself.

Durch den EREMA Schneidverdichter wird das Material sehr gleichmäßig und schonend erwärmt und erweicht. Das bedeutet, dass dadurch Reibung und thermische Belastung im Einzugsbereich des Extruders sehr gering sind. Diese "Warmbeschickung" ermöglicht auch sehr kurze Extruderbauformen mit kurzen Verweilzeiten des zu verarbeitenden Polymers im Extruder. Der MFI-Abbau wird so auf ein Minimum reduziert.

Noch geringere MFI-Abbauwerte werden mit dem EREMA Randstreifen-Aufbereitungssystem KAG erzielt. Bei diesem Recyclingsystem wird das verarbeitete Material in einem extrem kurzen Extruder (L/D:7) nicht zur Gänze aufgeschmolzen und in rieselfähiges Granulat umgewandelt. Niedrigster Energiebedarf (0,12...0,18 kW/kg) und kaum meßbare MFI-Verlust sind gewährleistet.

Beim PET-Recycling ist ein möglichst geringer IV-Abbau bzw. eine IV-Erhöhung des Materials überaus wichtig. Darum werden bei VACUREMA PET Recyclinganlagen vorgeschaltene Vakuumreaktoren zur überaus effektiven und kostengünstigen Kristallation, Dekontaminierung und Vortrocknung des Eingabematerials verwendet. Eine Erhöhung der Intrinsischen Viskosität (IV) von bis zu 8% werden durch Hochvakuum und hohe Temperaturen erreicht.

Aufwendige und kostenintensive, externe Vortrocknung und externe Kristallisation des verarbeiteten Materials sowie der Einsatz von chemischen Additiven und/oder Solid State Kondensation wie bei anderen, herkömmlichen Systemen sind dabei generell nicht notwendig!

Gerne können Sie sich bei einem Materialprobelauf selbst von der Leistungsfähigkeit der EREMA Kunststoffrecyclingsysteme überzeugen.

When recycling fibre scraps with adhering spinning oil, reusing the repellets created to make new fibres is hindered due to the spinning oil content in the repellets being too high. The spinning oil content in the repellets tends to form gas bubbles in the production extruder, thus making spinning impossible.

The Erema recycling process with the patented cutter-compactor under vacuum ( Vacurema extrusion system) provides an effective solution to largely eliminate spinning oil during the process. High vacuum and appropriate temperatures mean a rapid increase in the vaporising intensity of most commercially available spinning oils. The vaporised spinning oils are drawn out in the cutter-compactor and do not enter the recycling extruder, or the repellets.

Please contact our experts to arrange a demonstration / date for testing at Erema with your material free of charge!

...has so far been either very difficult or even impossible to reprocess. The repellets produced on conventional plants are typically inadequately degassed. Please click on this webside under  Erema TVE extruder technology, to collect  information  how the production of completely degassed pellets has been made possible with this tailor made , unique Erema technology.

If you want to convince yourself , please contact our experts to arrange a demonstration / date for testing at Erema with your metallised waste material free of charge!

With conventional extruders, feeding the extruder with very lightweight, foamed materials with low bulk densities poses a problem. Low throughput rates and only partially filled extruders with various disadvantages (e.g. oxidation problems, surging) are the result.
The typical Erema cutter/compactor/extruder approach has proven to be ideal for processing such materials. Here the cutter/compactor lives up to its name as a pre-compactor. As a rule the material can be fed into the cutter/compactor without size reduction and merely with pre-portioning. The material is reduced in size in the cutter/compactor and the cutting friction heat resulting from the size reduction is used to thermally pre-compact the material.

Foamed polystyrene waste (EPS), for example, can be reliably pre-compacted by a factor of ten to twenty times that of its original density, heated and softened in the process and, as such fed directly into the extruder. The result is a stable, high extruder throughput, regardless of the bulk weight of the feed material. The Erema system is equally suitable for handling all types of foamed, thermoplastic materials such as EPS, EPE, EPP, foamed PET, etc.

For further information please contact our experts or , if you want to see for yourself , what is possible , please  arrange a demonstration / date for testing at Erema with your foamed plastic materials  free of charge!

Organic contamination such as paper, wood etc. tends to create gas through decomposition when being reprocessed in the extruder. Foamed pellets of no use are the result, even when degassing extruders are used.

The problem with conventional degassing extruders is that the contamination still tends to form gases even beyond the degassing zone of the extruder, particularly in the area of the melt filter at the end of the extruder where the contaminants are filtered out and spend time at the filter screen. This leads to the all too familiar negative result. In practice such contaminated materials are therefore often extruded twice. In the first extrusion process the gas-inducing contaminants are filtered out, and the second extrusion is used to degas the cleaned material. The entire procedure involves high reprocessing costs as a result.

With the unique , patented Erema TVE extruder technology the melt filter is situated ahead of the twin degassing openings of the single screw extruder. Filtration takes place first , in one single extrusion step, and the cleaned melt is then degassed very effectively with a double degassing feature. The result is completely bubble-free, melt-filtrated pellets after one single extrusion process only.

For further informations , please click on this webside under Products / TVE (extruder system) , or contact our experts to arrange a demonstration / date for testing at Erema with your material free of charge!

Erema extruders are equipped with bi-metal screws and bi-metal cylinders as a standard feature. This is where Erema gives a guarantee for minimum hardness and minimum thickness of the wear layer. Using first class, extremely wear-resistant materials has been our standard for many years, and ensures maximum extruder service life. In the case of special applications (e.g. processing materials filled with glass fibre) Erema uses tungsten carbide reinforced screws and cylinders.

When pelletising abrasive, highly filled materials (polymer melts), tungsten carbide die faces and/or special die designs are used.

The Erema subsidiary 3S specialised in refurbishing worn screw parts and is equipped with first class facilities to repair all types of extruder screws (not only Erema´s!) quickly and efficiently.

You can trade in your worn Erema screw in exchange for an as new refurbished one at a very attractive price.

Get in touch with us.
Our experts will be pleased to discuss your wear problem

(Each supplier tells me a different story)

It really has become a tough job to keep track of and form an opinion about the wide range of systems offered in the field of plastics recycling.
In addition different plastic waste requires different technologies.

Erema offers the complete range of state of the art technology for almost all plastic recycling tasks.

No matter with which problem you confront us , almost everyone has been solved before already at least once somewhere in the world among our more that 2000 Erema plstic recycling plants in operation. 

This knowledge , to know , how , has made us number one in the market. 
Benefit from this vast know how !



Allow us , to make you a few suggestions :

Visit the supplier and let a test run or a demonstration assist you in making your decision. Ask for references or a reference list , speak to reference clients, visit them, and then form an opinion.

We would be pleased to adapt one of our full size test machines in our large technical centre to specifically handle your waste plastic, and would welcome your visit to our company for us to demonstrate our latest technologies and its performance power.

It would also be a pleasure for us to organise a visit for you to one or more of our reference clients near you.

Please contact our experts to arrange a demonstration / date for testing at Erema with your material free of charge!

Thanks to special process configurations , the Erema technology is ideal for transforming also above materials or other sensitive materials into pellet.

Please contact our experts for deeper discussion about your application respectively what is possible and/or arrange a demonstration / date for testing at Erema with your material free of charge!

In the past, external pre-shredding / size reduction was necessary for this. Technical innovations now enable such waste plastic to be fed into Erema systems DIRECTLY, discontinuously and without upfront size reduction.
Ask for the  Erema Coax  technology or click on under Products / Coax for further informations.

 Demonstrations are possible at the Erema Technical Centre (please ask for an appointment).

Please contact our experts for further infos and/or to arrange a demonstration / test run with yor material free of charge at Erema.

The classical Erema cutter/compactor/extruder combinations with the cutter/compactor properties of dynamic premixing and predrying are perfect for producing plastics/wood mix pellets or for directly producing semi-finished products such as profiles, pipes etc. made of plastics/wood mixtures. Instead of wood, also other organic fillers can be used.

Please contact our experts to arrange a demonstration / date for testing at Erema with your material free of charge!

This normally involves a washing process before repelletising. The enlarged cutter/compactor of the 3 rd and 4 th generation Erema plants has outstanding predrying properties and enables the Erema plant to be fed with washed plastics with residual moisture contents of up to approx. 10 % when using standard plant executions and up to 20 (twenty !) % , when using Eremas latest "Double Disc Technology". 

This way,  energy-intensive and high maintenance drying systems at the end of  washing systems can be realized in a much easier and more compact way.

Extremely powerful melt filtration systems (RTF- series melt filter system  and laser filter) , as well as Eremas unique TVE extruder technology , developed especially for post consumer applications , additionally help to cut down the size of washing plants, round off the Erema technology and, in many cases, make it possible to use just small, compact and straightforward washing systems.

For the recycling of post consumer PET bottles Erema has developed and sucessfully marketed a special , unique technology , the Vacurema extrusion system. For further information click on this homepage under products / Vacurema.

Please dont hesitate to contact our experts for additional information and help.

All the above described , tailor made technology is also available for free testing with your plastic waste material .
You are invited to join a free of charge demonstration in our labs in order to test the capabilities of our unique technologies.