ESD PAI

Overview

ESD PAI is an electrostatic dissipative grade of Polyamide-imide (PAI), commercially known by the Solvay trade name Torlon. PAI occupies a tier above PEEK in the engineering plastics hierarchy — it has the highest continuous service temperature of any unfilled thermoplastic, outstanding compressive strength, and exceptional wear resistance. When modified with carbon or conductive filler for ESD performance, ESD PAI becomes the highest-performance ESD plastic available. It is specified in the most demanding semiconductor equipment applications where extreme temperature, heavy loads, and ESD control must all be satisfied simultaneously — applications where ESD PEEK or ESD Ultem would not be adequate.

Working properties

• Extreme service temperature

  PAI has the highest maximum continuous service temperature of any unfilled thermoplastic. ESD grades maintain this property, enabling use in high-temperature semiconductor processing fixtures, oven carriers, and aerospace environments that exceed the capability of ESD PEEK or ESD Ultem.

• Compressive strength and stiffness

  PAI has exceptional compressive strength and stiffness at elevated temperatures — properties that make it suitable for precision bearing components, pump parts, and structural fixtures under significant mechanical load at temperatures where other plastics would creep.

• ESD performance

  ESD PAI grades provide static-dissipative resistivity for ESD-controlled environments. The conductive filler maintains consistent resistivity over the operating temperature range, important in high-temperature processes where resistivity shift in lesser materials is a concern.

• Wear resistance

  PAI has inherently good wear resistance — among the best of any engineering thermoplastic. ESD PAI grades are used for precision wear components in semiconductor automation where both ESD control and long wear life are required.

• Processing sensitivity

  PAI requires careful machining and controlled heat treatment (post-cure cycle) to achieve its rated properties. It is more demanding to process than PEEK or Ultem. Lead times and minimum quantities are typically higher than commodity ESD materials.

Typical uses

• Semiconductor wafer handling components requiring extreme temperature and ESD control simultaneously
• High-temperature oven and reflow fixture components in electronics manufacturing
• Precision bearing and bushing components in ESD-controlled semiconductor automation
• Aerospace and defence electronic assembly fixtures requiring ESD control and structural performance

Things to confirm before ordering

• Application verification — ESD PAI is a premium specialty material; confirm with us that it is genuinely the appropriate grade before proceeding.
• Resistivity class — confirm required resistivity range for your ESD zone.
• Post-cure requirement — PAI components may require a post-cure heat treatment cycle to reach full mechanical properties; confirm whether this is required and can be performed.
• Lead time — ESD PAI is not a standard-stocked commodity; confirm lead time at enquiry.

How does ESD PAI compare?

• ESD PEEK →

  ESD PEEK is the most common high-performance ESD material and covers the majority of demanding semiconductor applications. ESD PAI is considered when ESD PEEK's temperature limit or compressive strength are not sufficient.

• ESD Ultem →

  ESD Ultem is below ESD PEEK in performance hierarchy. ESD PAI is appropriate only when both ESD PEEK and ESD Ultem are inadequate for the specific temperature and load requirements.