Washing plants for thermo-plastic plastics

Our current generation of washing systems for heavily soiled plastic waste is the result of continuous development. Since 1977 we have been designing and building washing systems for heavily soiled plastic articles from the post consumer sector. This experience led to the development of our current generation of modular washing systems. For you, this means a solution tailored to your task and the desired purity.



How it works

  • The PET bottles are usually pre-sorted and pressed into bales. These are transported via conveyor belt into the bale opener and separated there into individual bottles.
  • In the next stage, the PET bottles are ground into PET flakes in a wet granulator.
  • The already shredded input material is then subjected to an intensive cleaning process in the subsequent friction washer. In this process, paper labels and adhesives are removed. In the pneumatic separating stage, vibrating units and fans separate out the loosened contaminations.
  • In the floatation tank, the infed material is separated using a density based procedure.
  • PET flakes sink to the bottom of the tank, the PE/PP lids remaining floating on the surface of the water.
  • If a particularly high level of purity is to be achieved for the PET flakes, the line is enhanced at this point by a hot washer. The addition of washing media (NaOH) is possible at this stage.
  • The clean flakes are fed into the drying system, dried to a residual moisture level of less than 1 % and pre-crystallised at the same time.
  • In place of the manual sorting described under point 2, an automatic sorting unit may be integrated to sort according to material type and/or colour.
  • Then the clean PET flakes are filled into big bags or transported into a silo for further processing.


Areas of application

  • For washing plastic material waste
  • For bottles, film, technical plastics and other materials
  • Harvesting of clean flakes, agglomerate
  • The washed material is suitable for use in food packaging and thus fulfils the highest quality standards
  • For existing washing plants, we make upgrades available or provide individual components/segments in order to achieve increased quality

Structure of the machine

This graphic shows an example of the construction of a PET bottle washing plant

  • 1. Preliminary shredding
  • 2. Washing              
  • 3. Sink or swim procedure
  • 4. Intensive washing   
  • 5. Drying      
  • 6. Packing

Benefits of our washing plants

Extruder systems offline

Our recycling extruders - optimised for the feeding of light, non-free-flowing feed materials.

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Sikorex edge trim system

The SIKOREX series form the basis for an economic preparation - optimised for the return of roll material or for direct edge trim return.

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Hybrid edge trim system

The HYBRID system covers all requirements of a modern spunbond production - even on high-speed winders with speeds above 1,500 m/min a direct edge trim return is guaranteed.

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Washing plants

Our washing system with friction washer and the patented wet separation stage with integrated pre-flotation enable above-average purity grades, even with heavily soiled feed material.

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