| HS Code | 387592 |
| Density | 1.01 g/cm³ |
| Water Absorption 24 H 23 C | 0.2 % |
| Melting Temperature | 178 °C |
| Glass Transition Temperature | -40 °C |
| Tensile Modulus Conditioned 1 Mm Min | 1100 MPa |
| Tensile Stress At Yield Conditioned 50 Mm Min | 32 MPa |
| Tensile Strain At Yield Conditioned 50 Mm Min | 5 % |
| Tensile Stress At Break Conditioned | 45 MPa |
| Tensile Strain At Break Conditioned | 200 % |
| Flexural Modulus Conditioned | 1000 MPa |
| Charpy Impact Strength At 23 C Conditioned | No break |
| Charpy Notched Impact Strength At 23 C Conditioned | 30 kJ/m² |
| Vicat Softening Temperature B50 | 95 °C |
| Heat Deflection Temperature 1 80 Mpa | 50 °C |
| Shore D Hardness Conditioned | 55 |
As an accredited Evonik VESTAMID® LX9013 BK 9.7507 Nylon 12, Conditioned factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied as conditioned black nylon 12 pellets in sealed moisture-proof packaging, 25 kg net weight, ready for processing. |
| Container Loading (20′ FCL) | 20′ FCL: Nylon 12 granules in sealed bags, palletized, strapped, and secured to prevent shift during transit. |
| Shipping | VESTAMID® LX9013 BK 9.7507 Nylon 12 (conditioned) ships in sealed, moisture-barrier packaging to maintain its conditioned state. Store in a cool, dry area away from heat and humidity. Non-hazardous for transport, but avoid impact and exposure to moisture. Handle with standard industrial care to preserve material integrity. |
| Storage | Store VESTAMID® LX9013 in its original sealed container in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and moisture. Keep tightly closed when not in use to preserve the conditioned state. Avoid exposure to humidity, which can alter properties. Use within manufacturer-recommended shelf life for optimal performance. |
| Shelf Life | Shelf life is typically 2 years when stored sealed, dry, and protected from light in original packaging. |
When Type A nonmetallic air brake tubing is extrusion-formed on a 25:1 L/D single-screw extruder with a 45 mm diameter three-zone barrier screw, the conditioned VESTAMID LX9013 BK 9.7507 Nylon 12 pellet is dried at 80 °C for 4–6 h in a desiccant dryer with a dew point no higher than -40 °C until Karl Fischer titration measures less than 0.10 wt% moisture. The same moisture that provides post-installation ductility becomes a hydrolysis vector in the melt and causes splay, viscosity loss, and die lip residue if it is not removed before plastication. Barrel settings of 210 °C, 220 °C, 230 °C, and 235 °C from feed to metering hold the melt at 225–235 °C; residence time is capped at 30 min. A dry vacuum calibration tank is operated at -0.03 MPa to -0.08 MPa, and the downstream water baths are held at 15–25 °C to fix outer diameter before haul-off.
Formulation addition is 100 wt% prime VESTAMID LX9013 BK 9.7507; no external black masterbatch is needed because the integrated pigment package satisfies the ultraviolet and heat-aging requirements of SAE J844 and ISO 7628-2:2010. Rework from the same production lot may be re-introduced up to 15 wt% only after drying below 0.10 wt% moisture and screening through a 2.0 mm mesh. Foreign polyamide, mixed-color scrap, or peroxide-based melt modifiers are excluded because they shift the lot-qualified burst-pressure curve. Compliance validation uses the burst pressure, zinc chloride resistance, low-temperature flexibility at -40 °C, and heat aging at 100 °C for 72 h procedures of SAE J844, with dimensional stability cross-checked under ISO 7628-2:2010.
The production line runs a spiral mandrel die with a draw-down ratio of 2.0:1–3.5:1, a 200 µm screen pack, and melt-pressure variation held within ±0.5 MPa. If ambient relative humidity exceeds 60%, the feed throat is nitrogen-swept. After vacuum calibration, the tube passes through a laser odometer that controls eccentricity to ±0.03 mm. Post-extrusion conditioning to 0.5–1.5 wt% moisture is performed by immersion in a 60–70 °C water bath for 2–4 h or by ambient storage at 23 °C and 50% RH for 7–14 days per ISO 1110:2019. Terminal product types include coiled air brake tubing, fitting-ready cut lengths, reinforced air brake assemblies, and rapid-connect chassis harnesses in commercial vehicle braking systems.
A crosshead line running VESTAMID LX9013 BK 9.7507 as a loose-tube jacket encounters a narrow process window because the annular layer at 0.30–0.60 mm thickness and 2.0–3.0 mm outer diameter responds to extruder melt-pressure pulsation by varying eccentricity, which induces microbending loss in the optical fiber bundle. The dried compound is plasticated at 225–235 °C and delivered by a gear pump to a pressure tooling die with a tip/die land ratio of 3:1; the gear pump holds pressure oscillation within ±0.5 MPa, and the extruder is a low-shear 24:1 L/D design with a compression ratio of 2.5:1. A 100 µm screen pack removes carbon agglomerates and cross-linked particles that would otherwise create surface drag lines on the jacket.
Compliance is assessed under IEC 60794-1-2:2017 for mechanical performance, IEC 60794-1-21:2015 for optical attenuation after temperature cycling, and IEC 60332-1-2:2015 for flame propagation when the construction is installed in cable trays. Declaration under RoHS 2011/65/EU Annex II and REACH 1907/2006 is required; the black pigment system does not rely on lead-based stabilizers. Formulation addition remains 100 wt% prime, and in-line start-up scrap may be reintroduced up to 10 wt% only after re-drying to 0.10 wt% moisture and re-filtration through a 200 µm melt filter. No processing-aid masterbatch is added because external slip agents alter the surface friction on the buffering die and downstream water-trough rollers.
The downstream process uses a caterpillar haul-off at 250–500 m/min, a hot-water trough at 40–60 °C to control shrink-back, and a laser diameter gauge that maintains jacket eccentricity within ±0.03 mm. After coiling, the jacket is conditioned at 23 °C and 50% RH for 48 h before tensile elongation is checked on Type 5A specimens under ISO 527-2:2012. Terminal product types include loose-tube optical fiber cables, indoor/outdoor drop cables, and central-tube structures containing 2–24 fibers.
Because SAE J2043-compliant diesel fuel return lines require burst strength, impact resistance at -40 °C, and electrostatic dissipation under fuel flow, coextrusion lines pair the VESTAMID LX9013 BK 9.7507 outer wall with a carbon-black-loaded conductive PA12 inner layer in a three-layer spiral die. In a monolayer construction the grade is used at 100 wt%, but in the preferred multilayer structure the conductive inner layer constitutes 12–18 wt% of total wall mass, the adhesive tie layer constitutes 4–8 wt%, and the outer LX9013 BK layer constitutes 74–84 wt%. This distribution preserves the hydrocarbon barrier and low-temperature ductility of the outer layer while the inner surface maintains an electrostatic dissipation path to the quick-connect fitting.
Compliance is validated under SAE J2043 for nonmetallic fuel system tubing and ISO 19013-1:2019 for diesel fuel contact; European declarations include REACH 1907/2006 and RoHS 2011/65/EU Annex II. The inner conductive layer is selected so that surface resistivity remains below the threshold required by the vehicle manufacturer’s ESD specification, typically below 10^6 Ω/sq when measured at 23 °C and 50% RH. Outer-layer lot acceptance includes tensile elongation after conditioning, burst pressure at 23 °C and 100 °C, and impact at -40 °C using the method specified in ISO 19013-1:2019.
The production line uses three extruders feeding a common three-layer die at 230 °C; the outer LX9013 extruder barrel is set at 205/215/225/235 °C, while the conductive inner layer is run at 215–225 °C to preserve carbon black dispersion. The composite parison enters a vacuum calibration tank at -0.02 MPa to -0.06 MPa, and wall thickness is monitored by ultrasonic scanning at 2 kHz with a tolerance of ±0.05 mm. In-line annealing at 80–100 °C for 1–2 h reduces shrink-back to below 1.0% when re-checked at 120 °C for 30 min. Terminal product types include diesel fuel return lines, evaporative emission purge lines, fuel tank vent tubes, and quick-connect diesel fuel assemblies for light-duty and heavy-duty vehicles.
The extrusion of VESTAMID LX9013 BK 9.7507 into a pressure sheath for unbonded flexible pipe is a low-speed, large-cross-section process in which the principal risks are not surface appearance but long-term hydrostatic collapse, blistering after rapid gas decompression, and radial wall-thickness variation caused by a large die gap. Published data for this specific configuration is limited, and project-specific qualification is mandatory. The processing envelope is established around melt temperatures of 220–240 °C, die diameters of 150–400 mm, and wall thicknesses of 5–12 mm. Because the molten PA12 is extruded over a metallic carcass, the adapter residence time is capped at 30 min to prevent oxidative gel speck formation; measured melt-pressure variation across the spiral mandrel must remain within ±0.5 MPa to avoid asymmetric knit-line porosity.
Formulation addition is 100 wt% virgin, lot-traceable prime compound; no in-plant regrind, no external color masterbatch, and no processing aid are permitted in the pressure sheath because the qualification record binds the resin lot, antioxidant package, and extrusion thermal history. The feed system is nitrogen-dried to a dew point no higher than -40 °C, and the moisture content before plastication is held below 0.10 wt% by Karl Fischer titration. Qualification under API 17J:2014, API 17B:2014, and ISO 23936-1:2022 includes long-term hydrostatic strength, sour-service compatibility screening, and rapid gas decompression tests; acceptance limits are set by the project design pressure and the annulus fluid chemistry rather than a single universal value.
Production equipment for this grade on flexible pipe lines typically includes a 90–150 mm single-screw extruder with 20:1–24:1 L/D, a gear pump, and a spiral mandrel die; screw speeds of 5–20 min⁻¹ generate outputs of 20–80 kg/h depending on diameter and wall thickness. Barrel temperatures are ramped from 200 °C in the feed zone to 230–240 °C at the die, and the melt is delivered at 5–15 MPa. The sheath enters a segmented vacuum cooling bath at 60–70 °C; rapid cooling to below 40 °C is avoided because it freezes in high residual stress that later contributes to environmental stress cracking in the annulus. In-line annealing at 100 °C for 2 h or controlled slow cooling under insulating blankets reduces post-extrusion shrinkage to below 1.0%. Wall thickness is measured by dielectric or terahertz scanning and held within ±5% of the specified nominal; a >±5% deviation creates a thin radius that may collapse under external annulus pressure during installation.
| Property | Standard / test method | Acceptance value |
|---|---|---|
| Melt volume rate | ISO 1133-1:2022 | lot-specific tolerance ±15% |
| Tensile elongation after conditioning | ISO 527-2:2012 | ≥150% |
| Density | ISO 1183-1:2019 | reported value ±0.005 g/cm³ |
| Hydrostatic strength | API 17J:2014 | project-specific |
Terminal product types include unbonded flexible risers, static flowlines, dynamic jumper hoses, subsea water injection flowlines, and annulus vent lines where the pressure sheath is the primary hydrocarbon containment layer.
In industrial compressed air distribution circuits where galvanized steel pipe is replaced by thermoplastic network sections, the VESTAMID LX9013 BK 9.7507 pellet is employed as a corrugated or smooth-bore tube on a 30:1 L/D single-screw extruder equipped with a post-die corrugator whose mold blocks are held at 120–140 °C. The dried compound is plasticated at 225–235 °C and formed into 10–16 mm outer diameter tube with a wall thickness of 1.2 mm; corrugator speed is set between 10–30 m/min to balance profile depth against tensile strength.
Compliance for industrial compressed air service is evaluated under ISO 5774:2016, with system-level safety requirements covered by ISO 4414:2010. Formulation addition is 100 wt% prime; clean start-up scrap from the same grade may be reintroduced at 10 wt% after drying to 0.10 wt% moisture. No external carbon black or plasticizer masterbatch is added because the compound is already formulated for black industrial tube and the plasticizer migration resistance is part of the lot certification. The production line uses vacuum calibration at -0.02 MPa to -0.05 MPa, a 200 µm melt screen, and a laser profile scanner that rejects tube with corrugation depth deviation greater than ±0.15 mm.
After extrusion, the tube is conditioned at 23 °C and 50% RH for 7 days or immersed in 60–70 °C water for 3–4 h to reach 0.5–1.0 wt% moisture, which provides the required flexibility for installation around machine frames. Terminal product types include factory compressed air distribution lines, pneumatic actuator supply tubes, robotic work-cell air bundles, and modular compressed air drop assemblies.
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Evonik VESTAMID® LX9013 BK 9.7507 Nylon 12 is supplied as a heat-stabilised, black-pigmented polyamide 12 compound. The designation “Conditioned” indicates that the mechanical and physical data refer to specimens equilibrated at 23 °C and 50 % relative humidity according to ISO 291:2008. The LX prefix places the material in the high-viscosity, flexible segment of the VESTAMID L polyamide 12 range, while the BK 9.7507 designation identifies the carbon black colour package. The density of the formulation is approximately 1.01 g/cm³ under ISO 1183-1:2019. Under ISO 62:2008, equilibrium moisture absorption at 23 °C and 50 % relative humidity is approximately 0.7 % by mass, whereas saturation water absorption of polyamide 12 is approximately 1.4 %. This equilibrium moisture level is approximately one order of magnitude lower than the 9.0–10.0 % saturation range reported for polyamide 6 and polyamide 66, which contributes to more stable dielectric response and less dimensional change in humid assembly environments.
The conditioned state is not an accelerated laboratory artefact. For 4 mm injection-moulded PA12 specimens, equilibration at 23 °C/50 % RH commonly requires 7–14 days, and gravimetric confirmation is necessary because PA12 absorbs less water than short-chain polyamides. Dry-as-moulded values should not be substituted for conditioned values when designing snap-fit features, tubing bend radii, or press-fit interfaces exposed to humid air.
Absorbed water acts as a physical plasticiser in the amorphous phase of polyamide 12, weakening hydrogen bonding between polymer chains, lowering the glass transition temperature, and increasing chain mobility. The practical effect on LX9013 BK 9.7507 is a reduction in tensile modulus and yield stress relative to dry-as-moulded specimens, while elongation at break increases. Conditioned tensile data are generated on ISO 527-2 type 1A specimens injection-moulded per ISO 294-1 and tested at 23 °C. The typical conditioned tensile modulus is approximately 450 MPa, the tensile stress at yield is approximately 20 MPa, and nominal strain at break exceeds 50 % under ISO 527-1:2019 / ISO 527-2:2012. The Shore D hardness measured according to ISO 868:2003 is approximately 55. Charpy notched impact strength on 4 mm specimens at 23 °C is typically reported as no break under ISO 179-1:2010. Differential scanning calorimetry at 10 K/min under ISO 11357-3:2018 records a melting temperature of approximately 176 °C, confirming that the flexible behaviour does not eliminate the crystalline thermal transitions of the polyamide 12 backbone.
| Property | Test method | Conditioned typical value |
|---|---|---|
| Density | ISO 1183-1:2019 | 1.01 g/cm³ |
| Equilibrium moisture content at 23 °C / 50 % RH | ISO 62:2008 | 0.7 % by mass |
| Tensile modulus | ISO 527-1:2019 / ISO 527-2:2012 | ~450 MPa |
| Tensile stress at yield | ISO 527-1:2019 / ISO 527-2:2012 | ~20 MPa |
| Nominal strain at break | ISO 527-1:2019 / ISO 527-2:2012 | >50 % |
| Shore D hardness | ISO 868:2003 | ~55 |
| Charpy notched impact strength at 23 °C | ISO 179-1:2010 | No break |
| Melting temperature | ISO 11357-3:2018 | ~176 °C |
Before melt processing, the Conditioned designation applies to test specimens, not to as-supplied pellet moisture. Pellets stored at relative humidity above 60 % should be dried at 80 °C for 4–6 h in a desiccant dryer with a dew point of -40 °C until residual moisture is below 0.1 % by Karl Fischer titration. Production-scale extrusion of 6–12 mm OD tubing typically uses single-screw extruders with 20:1–25:1 L/D ratios and compression ratios of 2.5:1–3.0:1; barrel temperatures from 200 °C to 250 °C are common, with die head pressures between 80 bar and 120 bar depending on die diameter and land length. Injection-moulding machines of 80–120 t clamp force can fill multi-cavity tooling when melt temperature is held between 200 °C and 250 °C and the mould temperature is maintained between 40 °C and 80 °C. Gate dimensions should be 70–80 % of the wall thickness because of the high melt viscosity of the LX series. Hot-runner manifold temperatures above 260 °C are not recommended. If barrel zone temperatures must exceed 260 °C for short-shot correction, residence time should remain below 5 min, and screw rotation should be limited to avoid shear heating beyond 280 °C, at which chain scission and carbon-black dispersion breakdown can degrade surface finish and impact strength.
Melt viscosity lot-to-lot variation is monitored by melt volume-flow rate under ISO 1133-1:2022 at 235 °C with a 5 kg load. When the MVR falls outside the approved lot-specific control window, processors should adjust the barrel temperature profile rather than raise screw speed alone, because shear heating in a 25:1 L/D screw can increase melt temperature by 10–20 °C and mask rheological differences until downstream dimensional instability appears.
Mould shrinkage of LX9013 BK 9.7507 is typically in the range of 0.8–1.2 % in the flow direction and 1.0–1.4 % transverse to flow under ISO 294-4:2018. Conditioned parts can subsequently expand by 0.15–0.30 %, so circularity tolerances on snap-fit rings and tubing connectors require validation after moisture equilibration rather than immediately after moulding.
Compared with a general-purpose unplasticised PA12 extrusion grade, LX9013 BK 9.7507 in the conditioned state exhibits a Shore D hardness approximately 15 points lower under ISO 868:2003, with typical values of 55 for LX9013 versus 70–75 for unplasticised PA12. The conditioned tensile modulus of approximately 450 MPa is roughly half the 1000–1500 MPa range commonly reported for unplasticised PA12 under ISO 527-1:2019 / ISO 527-2:2012, while the melting temperature remains near 176 °C. Within the VESTAMID L portfolio, unplasticised extrusion grades such as L1670 and L1940 show higher tensile modulus and Shore D hardness but lower impact and flexibility; the LX9013 grade is selected when the part must survive repeated flexing or snap assembly without fracture. Against a polyether block amide of Shore D 40, the LX9013 grade provides higher stiffness, lower surface tack, and lower hydrocarbon permeability under SAE J1737 test conditions; however, the PEBA grade retains lower hardness and better low-temperature flexibility. Compared with polyamide 6 or polyamide 66, the PA12 backbone of LX9013 provides lower saturated water absorption under ISO 62:2008 and more stable flexural modulus in humid environments, but the short-chain polyamides may offer higher dry-state tensile strength and modulus when stiffness is the controlling design variable.
Typical applications where conditioned mechanical data control dimensional fit include flexible pneumatic tubing, cable protection conduits, and low-pressure fuel vapour lines. Dimensional soak tests on 100 mm extruded tube sections conditioned from dry to 23 °C/50 % RH often show linear growth between 0.15 % and 0.30 %; therefore, extrusion tooling dimensions and printed markings should be validated after conditioning rather than immediately after extrusion. In multi-layer fuel line constructions, the LX9013 grade may be used as an inner or outer layer, but published data for this exact black formulation in conjunction with EVOH barrier layers is limited and requires tie-layer compatibility testing on the production line. Published data for this specific BK 9.7507 formulation in potable-water service is also limited; NSF/ANSI 61 or KTW-BWGW certification must be obtained from the supplier before drinking-water contact.
Polyamide 12 grades in the VESTAMID L series exhibit resistance to aliphatic hydrocarbons, lubricating oils, greases, diesel fuel, and salt solutions when tested according to ISO 175:2010. The LX9013 BK 9.7507 grade should nevertheless be excluded from continuous contact with concentrated oxidising acids, phenols, and zinc chloride solutions. Zinc chloride stress cracking is a recognised failure mode for polyamides in service, particularly when stressed parts contact galvanised steel or road de-icing salts; maximum tensile strain in such environments should be limited below the threshold determined by bent-strip testing under ISO 22088-3. Because absorbed moisture lowers the glass transition of the amorphous phase, chemical resistance testing for wet-service components should be performed on conditioned specimens, not dry-as-moulded samples. Compliance with REACH and RoHS directives must be confirmed against the current safety data sheet and supplier declaration for each lot. Food-contact suitability is application-specific: the base polyamide 12 resin may be assessed under FDA 21 CFR 177.1500 or EU Regulation (EU) No 10/2011, but the carbon black in BK 9.7507 must separately comply with colourant provisions such as FDA 21 CFR 178.3297.
