Long-Chain Nylon (PA12)
PA / Nylon
Technical Specifications
- •Ultra-Low Moisture Absorption
- •Excellent Dimensional Stability
- •Chemical Resistance
Applications
Technical Data Sheet (TDS)
| Property | Typical Value |
|---|---|
| Density | 1.02 - 1.06 g/cm³ |
| Melt Flow Rate (MFR) | 5 - 20 (230°C/2.16kg) g/10min |
| Tensile Strength | 50 - 60 MPa |
| Elongation at Break | 100 - 300 % |
| Flexural Modulus | 1200 - 1600 MPa |
| Izod Impact Strength | NB kJ/m² |
| Heat Deflection Temperature (HDT) | 50 - 60 (1.82MPa) °C |
| Appearance | Natural / Black Pellets |
The above data are typical values and do not constitute a specification guarantee. Please contact us for the latest product datasheet.
Processing Conditions
80 - 90°C
4 - 6 hours
220 - 250°C
40 - 80°C
60 - 100 MPa
30 - 60 MPa
2 - 5 MPa
50 - 100 rpm
- Low moisture absorption — shorter drying time required
Storage & Handling
Long-chain nylon has very low moisture absorption, but sealed storage in a dry ventilated area is still recommended.
Related Products
Jinsu New Material
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sales@maxnmtech.com
Product Overview
Long-Chain Nylon (PA12) is a specialty polyamide with a much lower amide-group density than PA6 or PA66, giving it dramatically lower moisture absorption, better dimensional stability and superior chemical resistance. With moisture absorption of only about 1.5–3% (vs 8–9% for PA6), parts made from PA12 keep their dimensions, mechanical properties and electrical performance stable across humidity and temperature changes.
Our PA12 long-chain nylon grades are available in natural and black pellets, with tensile strength of 50–60 MPa and elongation of 100–300% for excellent toughness even at low temperature. The low moisture uptake also shortens drying time, simplifies storage and reduces post-molding dimensional drift. Applications include automotive fuel and air lines, cable jacketing, precision gears, pneumatic components and sporting goods.
Jinsu supplies long-chain nylon at competitive factory-direct prices with free samples, low MOQ and worldwide shipping. Contact us to discuss your application and we will recommend the right PA12 grade and modification level for your cost and performance targets.
Applications in Detail
Automotive Fuel & Air Lines
PA12 is proven in fuel lines, air brake tubing and ventilation hoses thanks to its low moisture absorption, excellent chemical resistance to fuels and oils, and good flexural fatigue life. Parts resist hydrolysis, stay dimensionally stable and perform reliably across a wide temperature range.
Cable Jacketing & Pneumatic Components
Long-chain nylon's low moisture uptake and good dielectric properties make it ideal for cable jacketing, connectors and pneumatic tubing where consistent dimensions and long-term reliability matter. Its toughness allows tight bend radii and repeated flexing without cracking.
Precision Gears & Sporting Goods
For precision gears, camera parts and sporting goods, the dimensional stability of PA12 keeps tolerances tight in humid environments where PA6 or PA66 would swell. Low moisture absorption also preserves impact strength and appearance over years of use.
Frequently Asked Questions
What makes PA12 different from PA6 or PA66?
PA12 has the lowest moisture absorption of all nylons, with the best chemical resistance and low-temperature toughness, at a higher cost than PA6 or PA66. Compared with PA6 or PA66, it absorbs far less moisture, keeps dimensions stable in humid environments and resists hydrolysis and chemicals much better.
Does long-chain nylon still need drying?
Yes, but far less than PA6 or PA66. Because moisture absorption is only 1.5–3%, drying at 80–90°C for 4–6 hours is usually sufficient, and the material is much more forgiving in humid storage conditions.
Can long-chain nylon replace PA6 or PA66 in my part?
In many cases yes, especially where moisture-related dimensional changes, hydrolysis or chemical exposure are a problem. Because long-chain nylon costs more, we evaluate your service conditions first and recommend the most economical grade that meets your requirements.
Are these grades available in black or UV-stabilized versions?
Yes. Natural and black pellets are standard, and UV-stabilized or heat-stabilized versions can be compounded for outdoor and under-hood applications. Tell us your end-use environment and we will recommend the appropriate stabilization package.