What is polypropylene (PP)?
Polypropylene (PP) is a versatile thermoplastic with low density, high chemical resistance and good processability. As a standard plastic, PP is one of the most commonly used materials worldwide - both for consumer goods and for technical components and moulds. Rubber-Plastic Composite Parts.
Properties of polypropylene (PP)
PP is particularly light (density approx. 0.90 g/cm³), rigid, impact-resistant (depending on modification) and resistant to a wide range of chemicals, greases and solvents. It absorbs hardly any moisture, is easy to weld and can be thermoformed or recycled.
- Temperature resistance up to approx. +100°C (temporarily higher)
- Good electrical insulating properties
- Not transparent, but easy to colour
- Inexpensive to produce and easy to injection mould
Modified versions with talcum or glass fibre filling increase rigidity and temperature resistance.
Application of polypropylene (PP)
Polypropylene is used in:
- Multi-component injection moulding with TPE, EPDM or Silicone after prior surface activation or coating
- Rubber-plastic composite parts (e.g. Housing, Sealing systems, lid)
- Packaging, containers, household goods
- Automotive engineering (interior panelling, battery boxes, ventilation parts)
- Medical and laboratory technology (disposables, device housings)
PP is particularly suitable as a carrier material in composite parts with elastomers such as TPE, EPDM or Silicone.