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Max / Min continuous Service temperature  175 - 185 °C / -98  to -101°C
       Processing temperature: 340 to 390°C
       Drying recommended : % of water < 0.04 %: 4 hr. at 150°C or 2 hr. at 180°C.
       Injection  Moulding:  Mouldings  of  very  small  parts  with  tight  dimensional
       tolerances. Melt temperature of 360°C & mould temperature of around 150°C is
       recommended.
       Extrusion  temperature:  Screw  with  L/D  of  20  is  recommended.  Elasticity  is
       generally high, so the orientation is weak.
       PESU  is  tough,  rigid  having  high  strength  and  stiffness  with  excellent  thermal
                                                            o
       stability, an ability to withstand loads at temperatures of up to 180 C for long periods
       and an ability to retain many mechanical and electrical properties at temperatures
               o
       up to 210 C. Hard to burn, flame retardant with very low smoke and toxic gas
       emissions  on  burning.  Possess  excellent  electrical  insulation  properties,  good
       creep performance especially when glass reinforced, good resistance to hydrolysis
       and most common sterilisation methods. PESU has good chemical resistance to
       oils,  petrol,  to  a  wide  pH  range  of  acids  and  alkalis,  aliphatic  hydrocarbons,
       alcohols, benzene, fats and cleaning and degreasing agents.
       PESU can be welded by friction, heat and ultrasound welding, solvent weld with
       methylene chloride, be vacuum metallised, electroplated, painted or etched
       Strengths: high temperature performance and rigidity even at high temperature,
       excellent  sterilization  resistance,  good  creep  resistance,  excellent  insulation
       properties, hydrolysis resistance under pressure up to 150°C, biocompatible and
       intrinsic flame retardant
       Limitations: Very high cost, Narrow processing window and high temperatures,
       attacked by polar solvents such as ketones, chlorinated solvents and aromatic
       hydrocarbons, poor UV light resistance, poor tracking resistance, relatively low
       notch sensitivity, charpy and impact resistance.
       Applications: Switch parts, cores for solenoids, lamp holders, connector housings,
       condensator film, gears, in hydrolysing or aggressive environments, automotive
       cooling system, fans, engine parts, drive parts, bulb reflectors, interior parts for
       aircrafts, parts for irons, coffee machines, micro wave, hot water meters and valve,
       parts for medical devices, Dyaliser, sterilisation trays, laboratory centrifuges, dental
       equipment, weapons  components, plastic bearing cages, oven components.
         44) Polyphenylsulphone (PPSU):
       Is an amorphous transparent plastic having a high melting temperature with quite
       low moisture absorption. Furthermore, it has better impact strength and chemical
       resistance than PSU and PESU from the polysulphone group. Also, PPSU can be
       better  sterilized  with  superheated  steam  than  other  members  of  this  group  of
       polymers, and is resistant to detergents and disinfectants.
       Density                                   1.29 - 1.3 g/cm 3
       Glass transition temperature              220 °C
       Max continuous Service temperature        149 - 210°C
       Processing temperature: 365 to 390°C
       Drying is needed: 2 hr. at 175°C or 4 h at 150°C.
       As many amorphous polymer, melt viscosity is quite high.

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