| HS Code | 348340 |
| Density | 1.01 g/cm³ |
| Melting Point | 178 °C |
| Water Absorption 24h 23 C | 0.25 % |
| Water Absorption Saturation | 1.5 % |
| Tensile Modulus Dry | 1200 MPa |
| Tensile Strength At Yield Dry | 45 MPa |
| Elongation At Break Dry | >200 % |
| Charpy Impact Notched 23 C Dry | 10 kJ/m² |
| Izod Impact Notched 23 C Dry | 8 kJ/m² |
| Vicat Softening Temperature B50 | 140 °C |
| Heat Deflection Temperature 1 80 Mpa | 45 °C |
| Shore D Hardness | 70 |
As an accredited Evonik VESTAMID® LX9039 NC Nylon 12, Dry factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Evonik VESTAMID® LX9039 NC Nylon 12, Dry is supplied in sealed 25 kg bags, ensuring moisture protection and safe handling. |
| Container Loading (20′ FCL) | 20′ FCL loaded with Evonik VESTAMID® LX9039 NC Nylon 12, dry, secured in packaging for safe transport. |
| Shipping | VESTAMID® LX9039 NC is shipped as dry nylon 12 pellets in sealed moisture-barrier bags or drums to prevent moisture pickup. Keep containers tightly closed, store in a cool, dry area, and protect from direct sunlight. Standard freight is suitable; no hazardous cargo designation applies. |
| Storage | Store Evonik VESTAMID® LX9039 NC Nylon 12 in its original, unopened container in a cool, dry, well-ventilated area. Keep away from direct sunlight, heat sources, and moisture. Ensure the container is tightly sealed to prevent water absorption. Avoid stacking heavy items. Use within recommended shelf life under proper conditions. |
| Shelf Life | Store dry in unopened original packaging. Shelf life is at least two years from the date of manufacture. |
Air brake tubing converted from VESTAMID® LX9039 NC is processed on single-screw extruders with L/D ratios between 25:1 and 30:1, a grooved feed throat, and a three-zone screw with a barrier section. The dry-as-supplied granulate is released to the feed throat only after Karl Fischer titration under ISO 15512 confirms moisture ≤ 0.1 wt %. Nylon 12 melting under ISO 11357-3 occurs between 170 °C and 178 °C; therefore a reverse barrel-temperature profile of 230 °C in the feed zone, 245 °C in the compression zone, and 235 °C at the die is used for wall thicknesses of 1.0 mm to 1.5 mm. Vacuum calibration is set to -0.05 MPa to -0.07 MPa gauge, with water temperature maintained at 20 °C to 40 °C because quenching below 15 °C depresses crystallinity and increases post-installation diameter relaxation. Finished tube at 12 mm ± 0.1 mm outside diameter and 1.5 mm ± 0.1 mm wall thickness is tested under ISO 7628:2010, DIN 74324-1, and SAE J844; burst pressure at 23 °C is specified as not less than four times the working pressure of 1.25 MPa, and cold impact at -40 °C must not produce longitudinal cracks or fitting leaks. Because nylon 12 crystallizes slowly, line speed and internal air pressure of 0.01 MPa to 0.03 MPa are matched to die swell and haul-off to prevent axial void formation; melt pressure before the 40/80/120 mesh screen pack is maintained at 8 MPa to 15 MPa. The end product is installed in truck and trailer compressed-air brake circuits, where exposure to zinc chloride, diesel, and road salt must not reduce fitting retention below operator-specific torque removal limits. Shorter lines may show higher ovality if the vacuum tank length is below 1.2 m, and capstan speed fluctuations above 2 % cause wall-thickness scatter above the ± 0.1 mm tolerance band.
Under API Spec 17J and API Spec 17K, flexible-pipe liner candidates are evaluated after exposure to multicomponent gas mixtures at design pressures above 10 MPa. VESTAMID® LX9039 NC, when processed as a thick-wall pressure sheath, must be qualified against the actual gas composition, water cut, and pH because published data for this specific configuration is limited. Nylon 12 absorbs less water than PA6 or PA66, but in water at 60 °C equilibrium moisture may reduce dry-condition tensile modulus by up to 30 % under ISO 527-1/-2. Extrusion of liners with wall thicknesses from 5 mm to 12 mm requires a low-compression screw with L/D 30:1 to 33:1, a melt pump, internal mandrel cooling, and segmented cooling-air zones because the solidification front moves radially inward. Melt temperatures are held at 225 °C to 250 °C, while melt pressure at the adapter is maintained above 20 MPa to avoid micro-void formation. Rapid gas decompression resistance is assessed under NORSOK M-710 or ISO 23936-1:2022 using service-representative autoclave cycles at 80 °C, partial pressures up to 20 MPa, and depressurization rates of 5 MPa/min or higher. The failure mode under explosive decompression is cavitation-driven blistering, which is controlled by cooling rate, crystallinity, and the absence of microvoids. End products are pressure sheaths, wear tapes, and anti-wear profiles in dynamic risers and static flowlines handling produced water and wet gas.
Monofilament extrusion for paper machine clothing and heavy-duty brush fill utilizes a water-quench line with a barrier screw of 24:1 to 30:1 L/D, a melt pump, and a filtration pack of 40/80/120 mesh. The dry pellets are processed at 230 °C to 250 °C, and the melt is extruded through a die with individual hole diameters of 0.6 mm to 1.2 mm into a water bath held at 30 °C to 35 °C. An air gap of 10 mm to 20 mm is used to control the initial spherulitic skin; a shorter air gap increases orientation but raises line-tension variability. The first draw stage is run at a draw ratio of 3.0:1 to 3.8:1 in a hot-air oven at 90 °C to 110 °C, followed by a second-stage draw at 1.1:1 to 1.4:1 and a relaxation stage of 5 % to 8 %. Final diameters from 0.15 mm to 0.35 mm are measured by dual-axis laser gauges and controlled to ± 0.01 mm. Drawn monofilament is wound under constant tension to prevent core-induced elongation and is tested under ISO 527-2 for tensile strength and elongation at break; bending fatigue resistance is screened by repeated reverse bending over a 1.0 mm mandrel until break exceeds 10000 cycles. The resulting monofilaments are used in spiral fabrics, paper machine clothing seams, and industrial brush fill where hydrolysis resistance and low water swelling in wet sections prevent dimensional instability.
Thin-wall nylon 12 sheathing for fiber optic loose tube assemblies and railway rolling-stock cables is run with pressure tooling rather than tubing tooling. The tip and die land length ratio is set at 3:1, and the melt is extruded at 235 °C to 245 °C onto a preheated core at 60 °C to 80 °C. Line speeds are 300 m/min to 600 m/min depending on sheath thickness; at 0.6 mm to 0.9 mm thickness, melt pressure must remain below 25 MPa to avoid die lip wear and shark-skin defects. The dry granulate is moisture-controlled to ≤ 0.1 wt % by ISO 15512, and hopper drying at 80 °C for 4 h to 6 h is introduced when ambient relative humidity exceeds 60 %. The finished sheath is tested under IEC 60794-1-2 for tensile performance and cold bend at -25 °C, and under EN 50306-2 for wall thickness and adhesion in railway cables. Nylon 12 is not inherently flame retardant; therefore, designs requiring EN 45545-2 fire hazards must use additional flame-retardant tapes or accept the base polymer’s limitation. End products are fiber optic loose tube jackets, sensor cable sheaths, and control cable outer layers in rolling stock and automated material handling systems.
Pneumatic control line production for off-highway equipment starts with a dried PA12 feed at ≤ 0.1 wt % moisture and a single-screw extruder with L/D 30:1. The tube is sized to 4 mm × 1 mm, 6 mm × 1 mm, or 8 mm × 1.25 mm, with inside diameter controlled by vacuum calibration at -0.03 MPa and outside diameter by a water-cooled sleeve at 25 °C. Flexibility is obtained from the nylon 12 chain structure and from post-extrusion moisture conditioning to 1.0 wt % to 1.5 wt % at 23 °C and 50 % relative humidity. The finished line is qualified under ISO 14743 for push-in fittings and under ISO 307 for solution viscosity retention after thermal aging at 100 °C for 168 h. Operating pressure is limited to 1.0 MPa at 23 °C and derated to 0.5 MPa at 80 °C unless the fitting manufacturer provides a different envelope. Chemical exposure to mineral oil, zinc chloride, calcium chloride, and diesel is acceptable for continuous service, but concentrated formic acid, phenol, and strong mineral acids above 10 % w/w at 23 °C cause stress cracking and weight loss. The end products are used in tractor-trailer pneumatic suspension lines, construction machinery pilot lines, and automated lubrication circuits.
Semi-rigid nylon 12 tube made from VESTAMID® LX9039 NC exhibits a tensile modulus that shifts with moisture content; at 0.1 wt % moisture the tube is stiff, while conditioning at 23 °C and 50 % RH to 1.2 wt % to 1.5 wt % lowers modulus and improves fitting retention. Post-extrusion annealing in a recirculating air oven at 80 °C to 100 °C for 2 h to 4 h is applied to relieve frozen-in orientation and to stabilize outside diameter after installation. The compression fitting insertion force and pull-out resistance are verified under the fitting supplier’s torque and pressure-cycling procedure, typically with a 25 % to 50 % safety factor over the rated working pressure. Long-term pressure cycling at 80 °C and 0.5 MPa with 1 Hz frequency is used to screen cut growth at the fitting edge. The material is not recommended for continuous exposure to hot sodium hydroxide above 50 °C or to hydrochloric acid above 5 % w/w because polyamide hydrolysis becomes measurable within 1000 h. The resulting tube is installed in robotics, machine tool air circuits, and water-cooling lines with push-in fittings where low dimensional change and vibration tolerance are required.
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Evonik VESTAMID LX9039 NC Nylon 12, dry is a natural-color, plasticizer-free polyamide 12 injection-molding grade supplied with controlled residual moisture for direct processing after sealed-bag storage. The “NC” designation indicates natural color; “dry” denotes low initial moisture rather than a post-conditioned moisture equilibrium. The unfilled polymer is selected for thin-wall snap-fit connectors, cable ties, automotive fluid clips, and fasteners where PA6 or PA66 would impose higher water uptake, higher density, or higher zinc chloride stress-cracking susceptibility. Density according to ISO 1183-1:2019 is approximately 1.01 g/cm³. Differential scanning calorimetry under ISO 11357-1/-3 places the melting peak near 176 °C. Dry-state tensile modulus measured under ISO 527-1/-2 is typically reported near 1,500 MPa, with yield stress of approximately 46 MPa and nominal strain at break above 50%.
The dry specification is commonly established by Karl Fischer titration under ISO 15512:2019, with the sealed-bag target generally at or below 0.10% water by mass. The polymer is hydrophobic relative to PA6 and PA66, but moisture uptake before molding is not negligible when bags are opened in humid air or when regrind is stored loose. At relative humidity above 60%, surface moisture can produce splay, flow-front hesitation, or inconsistent gate sealing in thin-wall tools. Opened containers should therefore be returned to moisture-proof storage or processed through a desiccant-bed dryer before use. The relevant boundary condition is not the inherent hydrophobicity of the PA12 chain, but the rapid surface adsorption of atmospheric water on otherwise dry pellets at high ambient humidity.
At the molecular level, polyamide 12 contains a longer aliphatic chain segment between amide linkages than PA6 or PA66. This reduces the density of hydrogen-bonding sites per unit mass and results in lower equilibrium water absorption, lower density, and slower property change after moisture conditioning. The plasticizer-free structure of LX9039 NC avoids monomeric or polymeric plasticizer migration, surface exudation, and the associated loss of stiffness during thermal aging. Compared with plasticized VESTAMID PA12 grades, the unplasticized dry grade retains higher dimensional stability and lower extractable content, but its low-temperature impact response is less soft than impact-modified or plasticized PA12 formulations. Comparative values are shown in the following representative data set.
| Property | Test method | Value |
|---|---|---|
| Density | ISO 1183-1:2019 | 1.01 g/cm³ |
| Melt volume-flow rate at 235 °C/2.16 kg | ISO 1133-1:2022 | 35 cm³/10 min |
| Tensile modulus | ISO 527-1/-2 | 1,500 MPa |
| Tensile stress at yield | ISO 527-1/-2 | 46 MPa |
| Nominal strain at break | ISO 527-1/-2 | >50% |
| Charpy notched impact strength, 23 °C | ISO 179-1/1eA | 6 kJ/m² |
| Melting peak | ISO 11357-1/-3 | 176 °C |
| Vicat softening temperature, B50 | ISO 306 | 170 °C |
| Water absorption, saturation at 23 °C | ISO 62 | 1.5% |
The values above are representative manufacturer data, not batch-specific specifications. The combination of low saturated water uptake and high strain at break distinguishes the material from standard PA6 and PA66 grades, which commonly absorb 8% to 10% water at saturation and exhibit more pronounced post-molding dimensional change in humid environments. In applications requiring resistance to zinc chloride solutions, such as automotive underhood clips exposed to road salt, unfilled PA12 typically resists environmental stress cracking better than PA6 and PA66. This behavior originates from the lower amide density and lower solubility of the salt solution into the polymer matrix, although the exact failure threshold depends on part stress, injection-generated orientation, and solution temperature.
Compared with glass-fiber-reinforced PA12 grades, LX9039 NC dry has lower tensile modulus and lower creep resistance. The unfilled grade is not a direct substitute where continuous load-bearing stiffness above 5,000 MPa is required; glass-filled PA12 compounds commonly exceed that threshold at fiber loadings above 30 wt%. Conversely, the unfilled high-flow grade is better suited to thin walls below 1.0 mm, where filled grades can produce excessive tool wear and weld-line weakness. The difference is therefore not a simple strength ranking but a processing-viscosity and dimensional-stability selection.
For sealed-bag material, direct processing is possible only if the hopper loader, feed throat, and machine nozzle are protected from condensation and if regrind is dried separately. The practical drying condition for opened or moist material is 80 °C to 90 °C in a desiccant-bed dryer for 4 h to 8 h, with a dew point below -30 °C and airflow sufficient to maintain pellet-bed temperature. Longer drying at high temperature can cause surface oxidation and yellowing, although PA12 is less sensitive than PA6 at the same moisture content. The target moisture for melt processing is 0.10% or lower. Moisture above that threshold does not produce rapid molecular weight loss as in polycondensation-grade PA66, but it can lower melt viscosity and shift the short-shot boundary in multi-cavity tools because steam bubbles alter the effective flow channel pressure.
Melt residence time in the barrel is a more critical threshold. At melt temperatures above 270 °C, unfilled PA12 can undergo thermal oxidative chain scission and discoloration. The recommended melt temperature range for LX9039 NC dry is 230 °C to 250 °C, with the lower half used for thick-wall parts and the upper half used for thin-wall connectors. Total residence time should be kept below 10 min in normal production, and below 5 min if the hot-runner manifold or nozzle retains material at high temperature during cycle interruptions. A thermocouple check at the nozzle should be part of setup because barrel wall readings do not capture adiabatic shear heating in the metering zone.
On injection-molding lines with general-purpose screws of 20:1 to 25:1 L/D and compression ratios of 2.5:1 to 3.5:1, the low-viscosity PA12 tends to recover quickly. Screw speed should be set so that recovery is completed within the cooling phase without excessive shear heating. Back pressure of 5 bar to 15 bar hydraulic is typical for unfilled PA12; elevated back pressure above 20 bar can increase melt temperature and create gas from degraded polymer if hold times are long. The transition from shot to shot should be controlled by screw position, not timer alone, to avoid overheating during operator interruptions.
Processing on multi-cavity hot-runner systems requires particular attention to manifold balance because the melt flow length in PA12 is high but the solidification window is narrow. Flow simulation using Moldflow or Moldex3D is commonly applied to place the gate in a region where packing pressure can compensate for volume shrinkage before gate freeze. Without such compensation, thin-wall PA12 parts can develop sink marks, dimensional spread, or weld-line cracks despite acceptable fill pressure. Published data for the exact manifold pressure drop of LX9039 NC in class-specific hot-runner geometries is limited; therefore, pressure drop should be characterized on the production tool rather than extrapolated from general PA12 data.
For unfilled PA12, mold temperature is typically set between 40 °C and 80 °C. The lower value supports faster cycles but reduces crystallization time and can freeze the gate before full volumetric packing, producing voids or dimensional variation in fastening features. The upper value improves weld-line strength and permits lower injection pressure, but it extends cycle time and can increase post-ejection shrinkage if the part is not cooled uniformly. For snap-fit connectors with thin flexural hinges, a mold temperature of 60 °C to 80 °C is often maintained to increase crystallinity and improve hinge fatigue resistance. For simple cable ties, lower mold temperatures near 40 °C are acceptable if the gate is large enough to remain open during packing.
Injection speed is set relative to the wall thickness and flow-length-to-thickness ratio. Thin-wall sections below 0.8 mm require high injection speed to prevent premature freeze-off. A rising injection profile or a high initial screw velocity can reduce flow hesitation at the gate, but excessive speed produces jetting, surface defects, and gate-area shear heating. The processing window is therefore not a single setpoint but a coupled response surface of melt temperature, mold temperature, injection velocity, hold pressure, and gate geometry. For LX9039 NC dry, the gate should generally be placed at a thicker section and sized to remain open until hold pressure has decayed to a level that does not displace the frozen skin.
Detailed process limits for any specific tool can only be validated by short-shot studies, gate-seal time measurement, and post-molding dimensional capability analysis. A short-shot study on a multicavity tool should be performed at the lowest intended melt temperature and the highest intended water content to define the minimum fill pressure. A gate-seal time study should then be performed by varying hold time and measuring part mass until no further mass increase occurs. These two curves define the usable processing window for the material on a given mold. Published generic process recommendations are not a substitute for this individual tool characterization.
Unfilled PA12 is resistant to many aliphatic hydrocarbons, diesel fuel, lubricating oils, greases, and salt solutions at room temperature. The material is used in automotive fuel-line clips and engine-compartment fasteners where continuous exposure to warm oil mist is expected. However, the polymer is not universally chemical resistant. Strong mineral acids, oxidizing acids, phenols, and polar solvents at elevated temperature can attack the amide linkage or plasticize the matrix. Concentrated hydrochloric acid and sulfuric acid can cause rapid surface cracking and loss of mechanical integrity. Oxidizing agents such as hydrogen peroxide at high concentration degrade the molecular weight. The material should not be specified for continuous service with hot chlorinated hydrocarbons or hot polar solvents unless component testing demonstrates sufficient retention.
Hydrolysis resistance of PA12 is better than PA6 and PA66, but continuous hot-water exposure above 80 °C can still reduce molecular weight over extended time. For intermittent condensation or short-term coolant exposure, the unfilled PA12 grade usually retains mechanical properties longer than PA66. However, published data for long-term hot-water aging of this specific grade is limited, and submersed components should be validated with the actual water chemistry, glycol concentration, and pressure cycling.
Zinc chloride resistance is a decisive reason for selecting PA12 over short-chain polyamides in automotive and cable-accessory applications. Road-salt solutions containing zinc chloride can cause rapid environmental stress cracking in PA6 and PA66 parts under tensile load. PA12 shows significantly better resistance in this environment, but the performance depends on the stress state and on the presence of molded-in orientation. Sharp notches, weld lines, or highly stressed snap-fit bosses should not be assumed to resist attack without testing because local stress concentrations create the same mechanochemical failure path regardless of base polymer.
For food-contact, medical, or drinking-water approvals, the base resin documentation alone is not sufficient. The final component must be assessed under the relevant national or regional regulation, including any applicable migration limits, additive restrictions, and conversion processing conditions. REACH and RoHS declarations are available through the manufacturer’s regulatory datasheet, but the dry unfilled PA12 grade itself is not a universal food-contact certification. Applications involving potable water or medical devices should be validated under the end-use regulatory framework before production release.
No conclusion is required beyond the final application boundary. For fuel-system clips, oxygenated fuel blends and alternate fuel exposure may require long-term immersion testing under SAE J2260 or equivalent because published data for this exact unfilled PA12 grade under aggressive alcohol-containing fuels remains limited.
