Reinforced Polyethersulfone Reinforced with 20% Glass Fibers (PESU+GF20)

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It is a high-temperature resistant, amorphous thermoplastic derived from polyethersulfone (PESU) reinforced with 20 % glass fiber. It is insoluble in water. Exhibits outstanding thermal stability, creep strength at high temperatures, resistance to fracture, superheated steam, oil, fuel, fluorine & coolants, good toughness & impact-resistance, high stiffness, good dielectric properties, high mechanical strength, very good fire behavior, excellent hydrolysis resistance, high resistance to thermal aging, very high long-term service temperature, resistance to weathering, good dimensional stability and good electrical insulating capacity.

This material data has been provided by M-Base.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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1.51 - 1.53 g/cm³

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Elastic modulus

5.5 - 7.5 GPa

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2.4 - 3.2 %

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Impact strength, Charpy notched

6.5 - 8.0 kJ/m²

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Impact strength, Charpy unnotched

47 kJ/m²

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60 kJ/m²

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Tensile strength

125.0 - 130.0 MPa

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at 2.4-3.2% strain



Coefficient of thermal expansion

2e-05 - 5e-05 1/K

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Specific heat capacity

1350 J/(kg·K)

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Thermal conductivity

0.19 - 0.22 W/(m·K)

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UL 94 V0



Dielectric constant

3.8 [-]

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4.2 [-]

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Electrical resistivity

10000000000000.0 - 100000000000000.0 Ω·m

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Technological properties

Application areas

Lamp holders, heat shields, impellers, printer cartridges


20% Glass Fiber

Processing methods

Injection molding, extrusion