Polyester Foam Resins

Compared to conventional matrix systems for fibre-reinforced products, UP foam resins offer material and weight reductions of up to 30 % thanks to their micro-cellular foam structure. In simple sealed moulds, glass fibre reinforced plastic components that are smooth on both sides are produced cost-effectively under a vacuum in comparatively short cycle times. The production of sandwich components resistant to bending, with a foam core, and the direct integration of metal reinforcements and threaded elements – for example for large vehicle components – has also proven itself.

Typical properties

• Dense matrix / composite of approximately 0.6–0.7 g/cm³ / 0.7–1.2 g/cm³
• Fibre content 20-50% of total weight
• Moulded part mass per unit area of 3000–5000 g/m²
• Flexural modulus of elasticity 3000–8000 MPa
• Bending resistance of 35–185 MPa
• Impact resistance of 35–65 KJ/m² (with 20–35% glass content)
• Reinforcing materials:
  • Continuous glass fibre mats
  • Composite glass fibre and fleece mats
  • Natural fibre mats
    

Special formulations and versions 

• Systems with long processing times for very large components
• Foam resin formulations with elevated dimensional stability under heat
• Systems for fibre-reinforced components with a high level of characteristics
• Coordination with gel coat / top coat for surface refinement
  
  

Flame protection formulations 

• Electrical industry: UL 94 V0
• Rail vehicle construction: DIN 5510 (S4, SR1, ST2)