Torlon tubes is a bit of a specialty plastic profile, usually made by extruding PAI resin pellets. PAI stands for polyamide-imide. Thanks to a really stable aromatic heterocyclic structure in its molecules, it handles heat and cold much better than most common plastics. Even at high temperatures, it keeps its strength and shape stable, and can work long-term in air at 250°C with very little change in size. It’s also wear-resistant, low-friction, UV and radiation resistant, doesn’t burn easily, and has high strength, good insulation, corrosion resistance, and a self-lubricating effect. Its thermal expansion is really low too.
