PSU - Polysulfone

Polysulflon, PSU (Polysulfone)

Application: surgical instruments (can be sterilized). pump Houses, technical issues, electrical contacts, computer share, motorrumsdele, components for dishwashers, microwave ovens and washing machines, parts for milking systems, kemirør high temperature, technical issues, parts for aircraft, heat exchangers m. m.

Polysulfone allows easy manufacture of membranes with uniform pores, which is used to filter systems include. reverse osmosis.

Replacement of polycarbonate in the case where higher operating temperatures and better chemical resistance is required.

Fire: PSU delivers by combustion CO2 and water, as well as sulfur-containing compounds. PSU is difficult to ignite and has a low smoke. PSU meets the requirements for UL 94 V-0.

Electrical properties:Good electrical properties.

Colors: Amorphous transparent let cute “ravfarvet” plastic.
PSU can be colored.

Moisture absorption: By 50% RF ca. 0,2 % . The plastic has only little fugtoptagelse


Physiological properties:PSU withstand autoclaving.

PSU can be approved according to EU directives and FDA regulations for use in food.

Trade names: Ultrasound®

History: Polysulfone was introduced by Union Carbide in 1965, from 1995 producing it in large quantities.

Identification fire test: PSU delivers by combustion CO2 and water, as well as sulfur-containing compounds. PSU is difficult to ignite and has a low smoke.

Category: amorphous material, slightly yellowish with good chemical- and temperature resistance and high dimensional stability.

Chemical resistance: Good hydrolysis resistance, withstands hot Vandals and steam up to about. 150°.. God kemikaliebestandighed. PSU is resistant to acids, base, skip, surfactants, oils and alcohols. PSU tolerate X-ray and gamma radiation.

PSU is attacked by organic solvents such as acetone, chlorinated solvents and acetates, which cause stress cracking.

Chemical structure: PSU is an amorphous thermoplastic. Density: 1,24 g/cm3

Delivery: Rods

Bonding: PSU can be glued with epoxy, polyurethane- g siliconelim. PSU right

also glued with dichloromethane to dissolve the plastic.

Mechanical properties: PSU is a strong and tough material with high dimensional stability.

PSU has a high creep resistance and high impact strength. PSU has no tendency to stress cracking.

Ball pressure hardness 140 N/mm2

Tensile Strength 70 MPa

Elasticitetsmodul 2700 MPa

Kærvsejhed 2 4 KJ/m

Optical properties: For one 3 mm PSU plate light transmittance will be around. 70%.


Cleaning: PSU withstand autoclaving.


Injection molding: PSU can be processed by injection molding, extrusion, blow molding, rotationsstøbning, blow molding and thermoforming.


Cutting PSU is excellent to machine cutting. PSU has no tendency to stress cracking.

Welding: Heat Mirror, hot air welding, friction welding or ultrasonic welding.

Thermal Properties. PSU softens above 175 ° C.   Glass transition temperatures are 185 ° C.

PSU may be used between about. -100OC and +150OC without deterioration.

PSU with 40% glasforstærkning, can be used continuously for +150OC without deterioration.

additives: PSU may be reinforced with glass fibers. PSU usually contain few additives.

Types of material mixtures which included PSU, can be PES – PSU – PPSU – NOT – PSU Alloy – PSU+PC – PSS – PSU+ABS .

UV- Stability: PSU has poor UV resistance, however, can be improved by the addition of carbon. PEI og PPSU (related plastics) attacked the other hand, not by UV rays.


Thermoforming (Termoformning): PSU can be processed by thermoforming, but should be pre-dried before heating.