Polyamidimide (PAI)

Alternative and trade names
Torlon®
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Description

Polyamidimide (PAI, engineering plastic) exhibits greater compressive strength and higher impact resistance than most advanced engineering plastics. High creep resistance and an extremely low coefficient of linear thermal expansion (CLTE) provide excellent dimensional stability. Parts made of PAI perform under conditions generally considered too severe for other thermoplastics.

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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Properties

General

PropertyValue

Density

1.38 - 1.4 g/cm³

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Mechanical

PropertyValueComment

Elastic modulus

4.2 - 4.7 GPa

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Elongation

4.0 - 8.0 %

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Tensile strength

120.0 - 160.0 MPa

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at 4-8% strain

Thermal

PropertyValueComment

Coefficient of thermal expansion

3e-05 - 3.5e-05 1/K

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Max service temperature

300 °C

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Short

260 °C

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Long

Specific heat capacity

1000 J/(kg·K)

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Thermal conductivity

0.21 - 0.26 W/(m·K)

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Flammability

UL 94 V0

Electrical

PropertyValue

Dielectric constant

3.5 [-]

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4.2 [-]

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Electrical resistivity

2000000000000000 Ω·m

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Optical

PropertyValue

Transparency

no

Technological properties

Property
Application areas

Bearings, washers, valve seats, wear rings, cams

Processing methods

Injection molding, coating, extrusion, melt spin processes