TORLON® 4203

TORLON® 4203: the reference PAI for electrical insulation and precision

An unfilled PAI for demanding electrical applications

TORLON® 4203 is an unfilled polyamide‑imide grade designed to deliver excellent dielectric properties while maintaining the inherent strength and heat resistance of PAI materials. It is widely specified for applications combining electrical, thermal and mechanical constraints.

Dimensional stability and thermal performance

The material features a very low coefficient of thermal expansion, enabling tight tolerances and reliable performance from cryogenic temperatures up to approximately 275 °C.

Mechanical and chemical behavior

TORLON® 4203 provides high stiffness, good creep resistance and strong chemical stability, making it suitable for long‑term use in aggressive industrial environments.

Typical applications

• electrical and thermal insulators
• precision structural components
• aerospace, defense and electronic equipment parts

• Semi-finished product manufacturer : Drake Plastics
• Raw material supplier : Syensqo
• Minimum thermal resistance (in °C) : -196
• Maximum thermal resistance (in °C) : 280
• Mechanical resistance traction module (in MPa) : 152
• Mechanical resistance compression module (in MPa) : 4000
• Mechanical resistance constraint compression (in MPa) : 221
• Pressure-velocity limit (PV) : Low
• Low friction and wear coefficient : Medium
• Wear resistance : Poor
• Electrical conductivity : Insulative
• Chemical resistance : Good
• Polymer name : Polyamideimide
• Polymer abbreviation : PAI
• Mechanical resistance (in MPa) : Medium
• Continuous thermal resistance (in °C) : 220