Recycling concepts

R&D work here focuses on recycling concepts aiming ad obtaining and reusing high-tech fibres such as carbon and aramid fibres in the medium-length range of 5 – 60 mm. These recycled fibers can be utilised in new semifinished products for the fibre composite sector and can be employed in other industries as well.
Specific activities include the development of new recycling concepts, the generation of feasibility studies, the preparation of sample amounts of materials, the development of complete value chains, and expert advice for implementation in industrial-scale.

The studies  focus on:

  •  Waste of reinforced-fiber materials from the semifinished product manufacturing process – e.g. fabric layers, woven fabrics, braids
  •  Waste of soft reinforced-fiber materials from the fibre composite production process – e.g. from cutting and punching processes performed prior to the composite consolidation phase as well as
  • Recycled fibres obtained through various other fibre recycling techniques

The typical semifinished products for reuse are:       

  • Needle-punched nonwovens and mats
  • Nonwovens bonded thermally or with binding agents
  • Wet laid nonwovens
  • Various fibre granules and chips/flakes for compounding/injection moulding with a fibre content of up to 95% (concentrate)

 

Technical equipment

 

  • Waste processing: Cutting machines and mills for shredding and grinding
  • Recycling fibres: Textile openers and special de-fibration technology
  • Processing technology for wet and dry laid, mechanically or thermally bonded nonwovens; processing technology for producing granules or chips with free-flowing properties
  • Testing of semifinished products in model composites  using pressing and injection moulding techniques (including determination of relevant composite properties)