FEP(Polypropylene)
Introduction of materials:
1.	Chemical structure:
Mainly copolymers.
2.	Key properties:
- 	Low specific weight of 0.91g/cm3 (PVC 1.40g/cm3) 
- 	High creep resistance 
- 	Excellent chemical resistance 
- 	TiO2 pigmentation 
- 	High resistance to ageing by thermal stabilizing good weldability 
- 	Excellent abrasion resistance 
- 	Smooth inside surface of the pipes, therefore no deposits and no growth over possible due to less frictional resistance 
- 	Less pressure losses in comparison with e.g. metals. 
- 	Non-conductive, therefore the structure is not affected by tracking currents 
- 	Very good processable thermoplastic(e.g. by deep drawing). 
- 	PP is a bad conductor of heat – therefore in most cases, no thermal insulation is required for hot water piping systems.