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.

Properties

General

Density ρ

1.38 - 1.4 g/cm³ at 20 °C

Mechanical

Elastic modulus E

4.2 - 4.7 GPa at 20 °C

Elongation A

4 - 8 % at 20 °C

Max allowed stress σmax

120 - 160 MPa at 20 °C

at 4-8% strain

Thermal

Coefficient of thermal expansion α

3E-5 - 3.5E-5 1/K at 20 °C

Flammability

UL 94 V0

Max service temperature, long Tmaxlong

260 °C

Max service temperature, short Tmaxshort

300 °C

Specific heat capacity cp

1000 J/(kg·K) at 20 °C

Thermal conductivity λ

0.21 - 0.26 W/(m·K) at 20 °C

Electrical

Dielectric constant εr

3.5 - 4.2 [-] at 20 °C

Electrical resistivity ρel

2.00E+15 Ω·m at 20 °C

Optical

Transparency

no

Technological properties

Application areas

Bearings, washers, valve seats, wear rings, cams

Processing methods

Injection molding, coating, extrusion, melt spin processes

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.