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Raw Material

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Foam-beads

Raw material under pressure
Expanded EPP is already pre-foamed to foam-beads at the resource manufacturer.

There are two types of raw material, autoclave-foamed EPP and foam-extruded EPP. The most frequently used substance is the autoclave-foamed one. Thereby, polypropylene-pellets are loaded up with an easily evaporating hydrocarbon (mostly butane) in an autoclave under pressure and elevated temperature. When draining the autoclave, the pellets froth up to EPP foam-beads.
The extruded EPP can easily be produced in different colors and is more temperature-resistant. However, with the fabrication of shaped parts higher steam pressure is necessary. The autoclave-foamed EPP mostly has better energy-absorption-values, but is offered only in grey and white standard.
  • Attributes
  • Fabrication
    • Raw Material
    • Process Media
  • Development
    • History
    • Market Trends / Visions
  • EPP and environment
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  • Contact
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