It is a non-reinforced amorphous polymer whose main features are its high thermal, electrical and mechanical properties which are typical of a crystalline polymer. Compared to its "brother" PES it has lower thermal properties, although this level is still high when compared to most other engineering plastics.

FEATURES 

Resistance to high temperature
Mechanical properties: very high tensile stress, flexural strength, E.modulus  
Resistance to hydrolysis and steam
Chemical resistance
Electrical properties
Transparency
 


WEAK POINT
 
The cost is higher than conventional engineering plastics. It does not stand UV rays and is therefore not suitable for outdoor applications 


APPLICATION

Mechanical: it is used for high performance applications such as bearings and precision gears at low as well as high temperatures.

Food contact: it is physiologically inert and is therefore used for parts in contact with food, even at high temperature. The excellent chemical properties make it suitable for pump components, flanges, etc. which are in contact with food liquids.
 
Electrical: the very good insulating and dielectric properties make it irreplaceable in many electrical applications: plates for circuits, coils, insulators.

Chemical: the use in this field is ideal thanks to its high chemical and thermal resistance. Good resistance to mineral acids, alkali and salt solutions. PSU is attacked by esters, chlorine and aromatic hydrocarbons.

Operating temperature in continuos (5000 hours)