RANGE POLYETHERSULFONE - PES -
Characteristics of the PES
Dimensional stability at high temperatures, low
coefficient of thermal expansion.
Good resistance to creep, even up to 150°C.
Good impact resistance, however, it is
susceptible to notching.
PES retains its toughness at low temperatures,
even at cryogenic temperatures.
Good electrical properties even at high
temperatures, i.e., above 200°C.
Good resistance to radiation, X-rays, beta rays,
and gamma rays.
Good chemical resistance.
Good resistance to ß, γ and X radiation.
FAR standard compliant because it gives off little
Good resistance to hydrolysis at a wide range of
PES is well-suited for electrolytic or vacuum
Good adherence of ionic deposition of thin layers
of metal (copper, gold, aluminium).
PES is a very useful electrical insulator at high
temperatures because it maintains a low loss
factor, a good dielectric constant, and high
volume resistivity at temperatures over 200°C.
At 20°C, the dielectric constant is 3.5 for a
frequency range of 50 Hz to 10 kHz, and varies
very little when the material contains moisture.
This combination of a 3.5 dielectric constant and
a loss tangent of 0.001 is unusual.
PES has excellent creep resistance.
PES has good impact resistance.
At -100°C the material retains a useful impact
Good tensile strength: 76 N/mm² at 180°C.
Good flexural modulus: 2300 N/mm² at 180°C.
PES remains usable for thousands of hours at
200°C without significant loss of mechanical
Heat deflection temperature under load
(HDT - 1.8N/mm²) 203°C.
Glass transition temperature: around 220°C.
PES resists well against aqueous solutions of
acids and bases.
Good resistance to chlorinated or fluorinated
hydrocarbons. Unsuitable solvents: methylene
chloride, 1,1,2-trichloroethane, and chloroform.
At low stress, PES can withstand short-term
exposure to solvents such as benzene, xylene,
Polar aromatics dissolve PES.
Holds up well against most oils and greases,
even at high temperatures, except for oils
consisting of diesters and phosphate esters.
It can be used in contact with fuels and premium-
grade petrol. For high stress at high
temperatures, make use of the qualities of glass
PES is weakened by UV.
PES has a low level of flammability, and its
combustion gives off very little smoke and toxic
The PES range has V0 classification under the
UL 94 standard at a thickness of 0.43 mm, and
oxygen indices ranging between 34-41.