| HS Code | 133848 |
| Density | 1.01 g/cm³ |
| Melting Point | 178 °C |
| Tensile Modulus | 1400 MPa |
| Tensile Stress At Yield | 38 MPa |
| Elongation At Yield | 5 % |
| Elongation At Break | >200 % |
| Flexural Modulus | 1200 MPa |
| Charpy Notched Impact 23c | No break |
| Charpy Notched Impact Minus40c | No break |
| Shore D Hardness | 60 |
| Water Absorption Saturation | 1.1 % |
| Vicat Softening Temperature | 145 °C |
As an accredited Evonik VESTAMID® LX9029 NC Nylon 12 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Evonik VESTAMID® LX9029 NC Nylon 12 is supplied in 25 kg sealed paper bags as free-flowing granules. |
| Container Loading (20′ FCL) | 20′ FCL: Pack pellets in sealed bags on pallets, secure for transport. Keep dry, avoid heat and contamination. |
| Shipping | VESTAMID® LX9029 NC Nylon 12 ships as solid granules in sealed moisture-barrier bags or drums. Protect from moisture, direct sunlight, and temperatures above 40°C. Not classified as dangerous goods under standard transport regulations. Keep dry and store in original packaging until use. |
| Storage | Store Evonik VESTAMID® LX9029 NC Nylon 12 in its original, unopened packaging in a cool, dry, well-ventilated area. Keep away from direct sunlight, heat sources, and moisture, as the material absorbs water. Maintain moderate room temperature and avoid condensation. Seal containers tightly after use to prevent contamination. |
| Shelf Life | Store in original sealed packaging, dry and cool. Shelf life is typically two years from the date of manufacture. |
In automotive evaporative emissions control, VESTAMID® LX9029 NC is processed as the polyamide layer in multilayer fuel vapor tubing at 100 wt% virgin resin in the matrix layer, with the layer representing 12–20% of total wall thickness depending on permeation margin required by CARB LEV III and Euro 6d evaporative emission limits. Before extrusion, pellets are dried in a desiccant dryer at 80°C to a residual moisture content below 0.10% and a drying-air dew point of −30°C; at plant floor relative humidity above 60%, dried pellets are transferred in closed hoppers to avoid moisture regain. Residual water above 0.10% causes bubble streaking and intermittent weld-line failure at the die because hydrolysis reduces melt strength at the 245°C ±5°C melt temperature. The downstream process uses a single-screw extruder with L/D 30:1, a 3:1 compression ratio, vacuum venting at −0.8 bar, and a coextrusion die applying the LX9029 NC layer over a conductive inner polyamide grade; the natural grade does not provide measurable surface conductivity for electrostatic dissipation in fuel lines. Dimensional validation is conducted per DIN 73378, while permeation and constructional validation follow SAE J2260 and ISO 19013-1:2019. The resulting terminal product range spans fuel tank vent lines, evaporative emission vapor return lines, and diesel fuel feed lines in passenger cars and light commercial vehicles.
In truck air brake coil production, the extrusion stock is formulated with 100 parts by weight of VESTAMID® LX9029 NC and, when color-coded outer identification is required, 2–4 parts by weight of a PA12-carrier masterbatch; regrind from the same production grade is introduced up to 25 wt% only after melt flow verification per ISO 1133-1:2022 shows a deviation of less than 15% from virgin melt flow. The line runs on a single-screw extruder with a grooved feed section and a vacuum sizing tank, with melt temperature held at 230°C ±5°C, a draw-down ratio below 1.5:1, and sizing vacuum at −0.4 to −0.6 bar to prevent ovality and wall-thickness variation. The main process conflict is retention of burst strength after hot-oil immersion at 100°C for 72 h, because insufficient drying or overheated regrind produces microporosity that reduces oil-aged burst pressure below the pass threshold in the SAE J844 and DIN 74324-2 validation plan. Production-scale failure is most often observed when screw speed exceeds 80 rpm on a 60 mm extruder, producing melt fracture at die entry and surface microcracks that propagate under cyclic impulse pressure. Finished articles emerging from this process include coiled air brake tubing, tractor-trailer hose sets, and pneumatic suspension supply lines.
The use of VESTAMID® LX9029 NC as an unbonded flexible pipe pressure sheath is constrained by a lower melt-temperature boundary of 210°C; at temperatures below this threshold on a 120 mm single-screw extruder, the melt exhibits insufficient homogeneity at the crosshead die, and the spider weld lines show reduced elongation at break under ISO 527-2:2012. The sheath is extruded at 100 wt% virgin pellets, with clean in-process reclaim limited to 10 wt% after Karl Fischer titration confirms residual moisture below 0.08%. Pre-drying at 80°C for 5 h in a desiccant hopper dryer is mandatory before processing, and the extrusion melt temperature is maintained between 220°C and 245°C across the die circumference. The downstream process applies a crosshead or rotating die over the tensile armour layer, followed by vacuum sizing to hold a nominal wall thickness of 8 mm with a tolerance of ±0.15 mm, and in-line cooling at a controlled rate that limits crystallinity variation. Compliance is assessed against API 17J and ISO 13628-2 for polymer pressure sheaths in unbonded flexible pipe, with melting enthalpy checked by ISO 11357 to verify thermal history. Published data for specific riser qualification configurations is limited; each pressure sheath formulation is validated through plant-scale extrusion and annulus testing before project deployment. Project deployments convert the sheath into dynamic risers, static flowlines, and subsea jumpers for oil and gas production.
Dry loose-tube fiber optic cable manufacturing uses VESTAMID® LX9029 NC as the buffer tube polymer at 100 wt% extrusion stock, with 2–5 wt% of a UV- and hydrolysis-stabilized masterbatch added for outdoor direct-buried or aerial cable constructions; the masterbatch must use a PA12 carrier to avoid phase separation and tube surface roughness. The extrusion line is configured with a 45 mm single-screw extruder, a melt temperature of 235°C ±3°C, a water-vacuum calibration trough held at 20°C, and a line speed between 150 and 350 m/min. Above 350 m/min, the production line typically exhibits periodic outer diameter oscillation and frozen-in stress that lowers crush resistance under IEC 60794-1-21 method E3, because the tube cannot fully relax in the cooling trough. Batch-to-batch melt-flow variation is checked per ISO 1133-1:2022; a shift greater than 10% from the reference lot triggers adjustment of the barrel set point before line startup. The buffer tube is subjected to gel compatibility testing, kink resistance testing, and long-term shrinkage measurement at 85°C for 24 h under Telcordia GR-20, and cable-level mechanical tests follow IEC 60794-1-2. This process supplies loose-tube outdoor fiber cables, central-tube drop cables, and hybrid fiber-copper distribution cables.
For electric vehicle charging cable jackets, the sheathing compound is based on 100 parts by weight VESTAMID® LX9029 NC with 3–6 parts by weight of a flame-retardant masterbatch; the natural grade is not halogenated, so the final jacket formulation must be validated as a complete compound for the required flame class under IEC 62893 and EN 50620. The jacket is applied with a 90 mm single-screw extruder using a barrier screw with L/D 25:1, melt temperature at 240°C ±5°C, and a stepped cooling trough profile from 60°C to 25°C to control jacket shrinkage and residual stress. Scrape abrasion performance is assessed according to ISO 6722-1 for road vehicle cable sheathing, while weathering and chemical resistance are validated under the charging infrastructure clauses of IEC 62893-1; RoHS Directive 2011/65/EU and REACH SVHC declarations are completed on the final sheathing compound because the base resin alone does not cover flame-retardant masterbatch constituents. A production bottleneck occurs when the masterbatch is not pre-dried together with the base resin, because moisture carried by the masterbatch creates surface pitting at line speeds above 100 m/min. Tubular and jacketed assemblies produced under this specification include flexible mode 2 and mode 3 charging cables, retractable charging station cable reels, and EVSE supply cable assemblies.
Corrugated underbody conduit and spiral-wrap cable protection tubing are extruded from VESTAMID® LX9029 NC at 100 wt% virgin resin, with 2–4 wt% carbon black masterbatch for UV exposure above the vehicle floor. The corrugation line uses a single-screw extruder feeding a corrugator mold block with melt temperature at 225°C ±5°C and mold vacuum at −0.8 bar; the forming vacuum must be stable to avoid alternating thin-wall hinge cracks in the corrugation valleys. The grade is selected for this field because its polyamide 12 backbone has a lower amide density than PA6 or PA66, which reduces attack by road-deicing salt solutions containing zinc chloride; validation is performed by measuring tensile property retention after immersion in 50 wt% ZnCl₂ at 23°C following the chemical resistance logic of SAE J2260 annexes. Vehicle-level cable protection compliance is verified against ISO 6722 for cable sheath materials and LV 112 for wiring harness component chemical resistance. The grade is not recommended for continuous immersion in concentrated hydrochloric acid above 40°C, because chain scission and embrittlement may reduce impact strength under ISO 180 notched Charpy testing. Corrugated conduit, split spiral wrap, and underbody cable protection tubes for passenger cars and commercial vehicles are the resulting finished article types.
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VESTAMID LX9029 NC is an unreinforced, natural-colour, low-viscosity polyamide 12 injection-molding grade supplied by Evonik Operations GmbH. The grade belongs to the VESTAMID L family and is built from laurolactam-derived PA12, giving a semi-crystalline aliphatic polyamide with a density near 1.01 g/cm³ when measured to ISO 1183-1, a melting peak reported near 176 °C by ISO 3146, and saturated moisture absorption of approximately 0.7 wt% at 23 °C according to ISO 62. The “X” suffix in the grade designation identifies a controlled low-viscosity rheology intended for thin-wall injection molding, and the “NC” suffix denotes natural colour. This grade is differentiated from medium-viscosity VESTAMID L injection grades and from extrusion-oriented VESTAMID L grades by its melt-flow adjustment, not by a different base chemistry. Published lot-specific values for melt volume-flow rate, tensile modulus, and Charpy impact should be obtained from the current Evonik technical datasheet because these values shift with moisture conditioning, regrind content, and processing history.
On production-scale injection molding equipment, the low-viscosity VESTAMID LX9029 NC is typically processed with a general-purpose polyamide screw having a length-to-diameter ratio between 18:1 and 22:1 and a compression ratio between 2.0:1 and 2.5:1; hardened steel check rings are sufficient for the unreinforced grade. Melt temperature is normally set in the range 230 °C to 260 °C, and mold temperature is maintained between 40 °C and 60 °C. A low to moderate back pressure of 0.5 MPa to 1.5 MPa is used to avoid excessive shear heating. Thin-wall sections below 1.0 mm require fast injection speed and adequate venting; the low melt viscosity supports longer flow paths than higher-viscosity PA12 at equivalent injection pressure, but published spiral-flow data for this specific configuration is limited.
Pre-drying is mandatory when ambient relative humidity exceeds 60 %. Desiccant drying at 80 °C for 4 h to 8 h to a residual moisture level below 0.1 wt% is required to prevent hydrolytic chain scission at melt temperature. Production-scale observations for unreinforced polyamide 12 show that insufficient drying produces silver streaks, splay, gas burns, and measurable loss of Charpy notched impact strength. The melt residence time at 260 °C should be kept below 10 min; holding the melt at the upper temperature limit beyond this window shifts molecular weight and causes visible yellowing in natural-colour parts. Regrind from sprues and runners can be reused up to 20 wt% to 30 wt% when the regrind is clean, dried, and free of oil contamination; higher regrind fractions increase lot-to-lot melt-flow variation and reduce impact performance.
Moisture content before molding can be verified by Karl Fischer titration according to ISO 15512 or by weight-loss methods, using the same 0.1 wt% residual-moisture limit. In facilities where ambient relative humidity remains below 35 % and material is consumed directly from sealed foil-lined packaging, drying may be omitted; however, partially used packaging exposed to plant air for more than 2 h must be re-dried. The operational boundary is not merely a storage issue: moisture entering the barrel at 230 °C to 260 °C accelerates chain scission, and the effect cannot be fully reversed by drying the molded parts.
Comparative property data illustrate the position of VESTAMID LX9029 NC against other unreinforced engineering polyamides. The values in the table below are representative dry-as-molded or saturation-conditioned values for unreinforced PA12, PA6, and PA66; they are typical ranges from published polymer-property summaries and not lot-specific certificates of analysis for a single shipment.
| Property | Test method | VESTAMID L PA12 / LX9029 NC | PA6 unreinforced | PA66 unreinforced |
|---|---|---|---|---|
| Density | ISO 1183-1 | 1.01 g/cm³ | 1.13 g/cm³ | 1.14 g/cm³ |
| Water absorption, saturation 23 °C | ISO 62 | 0.7 wt% | 9.5 wt% | 8.5 wt% |
| Melting peak | ISO 3146 | 176 °C | 221 °C | 260 °C |
| Tensile modulus, dry | ISO 527-2 | 1,500 MPa | 2,800 MPa | 3,000 MPa |
| Charpy notched impact, 23 °C dry | ISO 179-1/1eA | 6 kJ/m² | 5 kJ/m² | 4 kJ/m² |
The density difference is direct: VESTAMID LX9029 NC parts are approximately 10 % to 12 % lighter than equivalent-volume PA6 or PA66 parts. Moisture conditioning is more consequential. At 50 % relative humidity and 23 °C, PA12 absorbs on the order of 0.5 wt% to 0.7 wt% water, whereas PA6 absorbs approximately 2.5 wt% to 3.0 wt%. The lower equilibrium moisture uptake reduces dimensional growth, warpage, and the loss of tensile modulus in humid service. In dry-as-molded comparisons, PA6 and PA66 are stiffer and stronger, but they carry a higher polar amide-group density and therefore a higher sensitivity to moisture-induced plasticization. VESTAMID LX9029 NC is selected when the part must retain consistent mechanical response across dry and humid environments rather than when maximum dry stiffness is required.
Dry-as-molded tensile property ranges for unreinforced VESTAMID L PA12 molding grades include tensile modulus of 1,400 MPa to 1,600 MPa, yield stress of 42 MPa to 46 MPa, yield strain of 5 % to 6 %, and nominal strain at break above 50 % when tested to ISO 527-2 at 23 °C. After equilibrium at 23 °C and 50 % relative humidity, tensile modulus typically declines by 10 % to 15 % relative to dry values because absorbed water acts as a plasticizer in the amorphous phase. Charpy notched impact at 23 °C remains in the range of 5 kJ/m² to 7 kJ/m² dry and is generally preserved or slightly increased at low moisture content; at -30 °C the notched impact value remains above 4 kJ/m², which is relevant for snap-fit closures and clips that must not become brittle in winter service. These values are typical, not guaranteed minima; lot-specific certificates of analysis govern batch acceptance.
Molding shrinkage for unreinforced VESTAMID LX9029 NC is typically between 0.6 % and 0.8 % parallel to flow and between 0.7 % and 0.9 % perpendicular to flow when measured on 60 mm × 60 mm × 2 mm plaques according to ISO 294-4. This anisotropy is lower than that of PA6 and PA66, which typically shrink 0.8 % to 1.5 % depending on crystallinity and wall thickness. Because of the low moisture uptake, post-molding dimensional change in humid air is also smaller. Parts conditioned at 50 % relative humidity typically show linear expansion of less than 0.2 %, whereas PA6 parts may grow by 0.5 % to 0.7 %. For close-tolerance electrical connectors, this reduces the need to design separate dry and humid service envelopes. However, shrinkage data from plaque specimens do not directly predict complex geometries; toolmakers should use mold-flow simulation calibrated with lot-specific pressure-volume-temperature data for the grade.
Typical component categories for VESTAMID LX9029 NC include thin-wall electrical connectors, housing clips, cable fasteners, modular fluid couplings, and automotive interior brackets. In these applications the processing advantage is the ability to fill wall thicknesses below 1.0 mm at moderate injection pressure, while the service advantage is low moisture uptake and stable performance across temperature and humidity. For connectors and snap-fit housings, the combination of yield stress near 44 MPa and Charpy notched impact near 6 kJ/m² at 23 °C allows the design of snap-and-lock features that retain ductility after moisture conditioning. For fluid couplings, PA12 offers low moisture absorption and good resistance to diesel and motor oil; however, component-level permeation and pressure-cycle validation is required because published data for permeation rates in injection-molded connector geometries are limited.
Chemical resistance is a principal differentiator. The low amide-group density of PA12 gives VESTAMID LX9029 NC better resistance to hydrolysis and to aqueous zinc chloride stress cracking than PA6 or PA66. In automotive fluid-contact parts, long-term exposure to diesel, motor oil, and greases at temperatures below the melting point is generally acceptable, but compatibility must be validated with the specific additive package and temperature profile according to ISO 175 immersion testing or automaker fluid-contact specifications. Strong acids, oxidizing media, and high-pressure steam above 120 °C hydrolyze the polymer; continuous service in boiling water is not recommended. The grade is not inherently flame-retardant; typical limiting oxygen index for unreinforced PA12 is 24 % to 25 % when tested to ISO 4589. Natural-colour VESTAMID LX9029 NC is not UV-stabilized; prolonged outdoor exposure causes chalking and surface embrittlement unless carbon black or a UV stabilizer masterbatch is added and revalidated.
Compared with PA11, VESTAMID LX9029 NC has a slightly lower density, 1.01 g/cm³ versus approximately 1.04 g/cm³ for unreinforced PA11, and a lower melting peak near 176 °C versus approximately 188 °C for PA11. Both polymer families offer low moisture absorption and better stress-cracking resistance than PA6 or PA66, but the choice between PA11 and PA12 is normally driven by specific heat exposure, chemical test results, and regional material supply rather than by one generic property difference. When the application operates continuously above 120 °C, neither unreinforced PA12 nor unreinforced PA11 is typically sufficient without additional stabilizers or a different polymer family.
Published property summaries for unreinforced PA12 injection grades list comparative tracking index above 600 V according to IEC 60112, and the material is normally classified as HB under UL 94 at thicknesses above 3.0 mm. These electrical and flammability values are not unique to VESTAMID LX9029 NC and must be verified with the current grade-specific datasheet before use in electrical housings or connectors subject to regulatory testing.
In extrusion and blow molding operations, the low melt viscosity of VESTAMID LX9029 NC limits its use. High-viscosity VESTAMID L grades are preferred for unsupported profile extrusion, coiled tubing, and blow-molded ducts because they provide the melt strength needed for draw-down control and tube concentricity. Injection molders using VESTAMID LX9029 NC should therefore restrict the material to injection molding and to short sprues or hot-runner systems; attempts to run the grade in long free-draw extrusion lines have been observed to produce thickness variation and poor calibrator sizing. This distinction is common across the VESTAMID L product range and is not an indication of improper drying or temperature control.
