NORRES Pre-PUR^®

Not all polyurethanes are the same! NORRES uses a special polyurethane mixture that is differentiated with the name Pre-PUR^® for several of its conduits. Our Pre-PUR^® raw materials are distinguished in the following ways from many of the membrane materials commercially available:

Applications/properties of the different materials in comparison

Applications / properties	Pre-PUR®	EPDM	Silicone
For municipal waste water acc. to DWA-M115
For industrial waste water
Free of softener and therefore no embrittlement
Resistant to organic oils and greases
Resistant to mineralic oils
Smooth surface to prevent incrustations
Permanently resistant to microbes and hydrolysis
Extremely good resistance to flex cracking (De Mattia) to ISO 132
High permanent elasticity
High tensile strength and tear resistance
Good resistance to UV