Elimination of Contaminant Volatiles and Odours in Plastic Materials

Abstract/Technology Overview

The presence of certain undesirable substances in plastic materials may constitute a quality problem in finished parts, thus generating defects, a reduction in properties and/or the emergence of unpleasant odours.

These problems can occur in:
- Virgin materials, including plastics from renewable origin, due to the presence of low molecular-weight volatile compounds coming from the synthesis or polymerization itself, as well as those generated during the different stages of the processing
- Recycled materials, which can contain contaminants of different nature due to their origin

Technology Features, Specifications and Advantages

Key technologies utilized for the removal of critical substances are: 
- Devolatilization by co-rotating twin screw extruder 
- Use of supercritical CO2 in extruder

The volatile extraction technologies can be adapted to the needs of each case, depending on the substances to be removed and the plastic material concerned.

Potential Applications

- Devolatilization of recycled materials
- Decontamination of solvent plastic drums
- Use of supercritical CO2 in extruder for removal of residual monomers


Customer Benefit

- Very effective extraction of volatile compounds in plastic materials
- Improvement of technical properties and quality of the materials and finished products
- Elimination of unwanted odours
- Increase in productivity: reduction of defective parts
- Greater efficiency in the decontamination of hazardous plastic wastes
- Access to markets and applications of greater added value

Technology Owner

Jose Antonio Costa Mocholi



Technology Category
  • Polymers/Plastic
  • Chemical Processes
  • Forming
  • Polymers
Technology Status
  • Available for Licensing
Technology Readiness Level
  • TRL 7

Contaminant Volatiles, Odours, Plastics