UDEL®,  RADEL® A and RADEL® R  as membrane Resin

In general

• More than 20 years of successful use in the membrane industry.
• Vast accumulated research knowledge in the use of polysulfone in open and patent literature.
• Low levels of insolubles, extractables and insoluble gels.
• Research and Development team at your service to answer your needs and specific requirements.

Chemical Resistance

• Stable to wide pH levels (from 2 to 13) and therefore can withstand many types of membrane cleaning methods.
• Soluble in water-soluble industrial solvents that are suitable for membrane manufacturing.
• Good oxidative stability allowing long term use of the membranes.

Mechanical properties

• Fairly good compaction resistance allowing use under high pressures.

Thermal properties

High enough glass transition temperature to allow use in high temperature and use of different sterilization techniques such as steam, ethylene oxide, gamma radiation and e-beam...

Membrane Manufacturing

• Easy membrane manufacturing.
• Allows reproducible formation of good quality membranes with sufficient flux and fiber strength.
• Forms membranes with different pore sizes, with proper choice of pore formers, viscosity and gelation conditions.
• Provides stable polysulfone solution viscosities even in the presence of air.
• Highest molecular weight grade, Polysulfone UDEL® P-3500 NT, is ideal in terms of solution viscosity and fiber strength; Formation of more cleaner solution is now possible with new UDEL® P-3500 NT LCD.