PUre diversity

Composites - puropreg®

PU composites are mainly found in the production of moulded parts resistant to bending. The skilful combination of materials puts the topic of lightweight construction into the spotlight (honeycomb technology applications). Sophisticated surface designs are supported by corresponding PU / UP resin systems.

Thanks to the reduced component weight, moulded part applications are used in the automotive sector  – and, with corresponding flame protection formulations, also in rail vehicle construction.

Typical properties

  • Moulded part density of 450–1100 kg/m³
  • Fibre proportion from 30 %
  • Available foaming agents: usually water


Reinforcing materials

  • Glass fibre rovings
  • Glass fibre mats and non-crimp glass fibre fabrics
  • Carbon fibres
  • Natural fibres (hemp, sisal, coconut etc.)


Special formulations and versions

  • Honeycomb materials for sandwich structure components
  • Paper honeycombs
  • Waterproof paper honeycombs (patent-pending process)
  • Plastic honeycombs
  • Aluminium honeycombs
  • Systems with a large processing window
  • Use of polyols based on renewable resources
  • Self-parting with simultaneous good lamination properties


Flame protection formulations 

  • Automotive: FMVSS 302
  • Rail vehicle construction: DIN 5510 (S4, SR2, ST2)
  • Aircraft construction: FAR 25853, ABD 0031
  • Construction industry: DIN 4102 B2

Application examples

Advert puropreg
Rear shelf Audi A3
Rear shelf Audi Q5
Rear shelf BMW 5 GT
Rear shelf Audi A7
Rear shelf BMW X6
Cross-section, honeycomb panel