PA12 (Nylon 12) vs PI (Polyimide): 0% composition overlap. Significantly different materials serving different application areas.
PA12 (Nylon 12) vs PI (Polyimide)
Side-by-side chemical composition and mechanical property comparison.
Overview
PA12 (Nylon 12)
Polyamide 12 — the long-chain polyamide with the lowest moisture absorption of all PA grades (0.1-0.15% vs PA6: 1.5%). Excellent dimensional stability in humid environments. Best chemical resistance among polyamides (oils, fuels, hydraulic fluids). Lowest density of all PA (1.01 g/cm³). Also the dominant 3D printing (SLS/MJF) material. Trade names include Rilsamid (Arkema), Grilamid L (EMS), TECAMID 12 (Ensinger), Vestamid L (Evonik). Used for fuel lines, brake lines, pneumatic tubing, cable sheathing, and 3D-printed functional parts.
PI (Polyimide)
Polyimide — THE extreme-temperature polymer. Continuous use 250-300°C (short-term to 400°C+). Outstanding thermal stability, low outgassing, excellent radiation resistance, and self-lubricating. Available as film (Kapton, DuPont), parts (Vespel, DuPont), and moldable resin. Expensive but irreplaceable where no other polymer survives. Used for aerospace bearings/seals, semiconductor processing, flexible circuit boards (Kapton), jet engine components, and space applications.
| PA12 (Nylon 12) | PI (Polyimide) | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ISO 10350 | ASTM D638 |
Chemical composition (wt%) — Pro
| Element | PA12 (Nylon 12) | PI (Polyimide) | Overlap |
|---|---|---|---|
| Polylaurolactam (from laurolactam/12-aminolauric acid) | 99–99.9% | — | — |
| Base Polymer (Polyimide) | — | 99–99.9% | — |
Mechanical properties — Pro
| Property | PA12 (Nylon 12) | PI (Polyimide) | Unit |
|---|---|---|---|
| Tensile Strength | 45–60 | 72–120 | MPa |
| Yield Strength | 40–50 | — | MPa |
| Elongation | 100–300 | 7–30 | % |
| Elastic Modulus | |||
| Density | |||
| Melting Point | |||
| Water Absorption (24h) | |||
| continuous_service_temp |
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Sign up free — 3 comparisons/day freeCompatibility Assessment
PA12 (Nylon 12) and PI (Polyimide) have significantly different compositions (0% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is PA12 (Nylon 12) the same as PI (Polyimide)?
PA12 (Nylon 12) and PI (Polyimide) have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace PA12 (Nylon 12) with PI (Polyimide)?
Generally not recommended. The compositions differ significantly (0% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between PA12 (Nylon 12) and PI (Polyimide)?
The main differences are in the following elements: overall alloying content. PA12 (Nylon 12) is a Polymers grade, while PI (Polyimide) is a Polymers grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.