| HS Code | 747540 |
| Density | 1.02 g/cm³ |
| Melting Temperature | 178 °C |
| Tensile Modulus Dry | 1600 MPa |
| Tensile Strength At Yield Dry | 45 MPa |
| Elongation At Yield Dry | 5% |
| Elongation At Break Dry | >200% |
| Charpy Impact Strength Dry 23 C | No break |
| Charpy Notched Impact Strength Dry 23 C | 11 kJ/m² |
| Charpy Notched Impact Strength Dry 30 C | 5 kJ/m² |
| Heat Deflection Temperature 0 45 Mpa | 90 °C |
| Heat Deflection Temperature 1 8 Mpa | 50 °C |
| Vicat Softening Temperature B50 | 170 °C |
As an accredited Evonik Vestamid L2122 sw 9.7507 (dry properties) Nylon 12 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged in 25 kg polyethylene-lined paper bags, sealed to keep Nylon 12 pellets dry and protected during storage and transport. |
| Container Loading (20′ FCL) | 20′ FCL loaded with Evonik Vestamid L2122 sw Nylon 12, dry granules, properly packed and secured for safe transport. |
| Shipping | Evonik Vestamid L2122 sw 9.7507 (dry properties) Nylon 12 ships in sealed moisture-proof packaging, palletized for safe handling. Use covered, dry transport to prevent moisture absorption. Store away from heat, sparks, and incompatible materials. Standard ground freight is typical; ensure product remains dry and stable during transit. |
| Storage | Store Vestamid L2122 in its original, tightly sealed container in a cool, dry, well-ventilated area. Protect from moisture, direct sunlight, and excessive heat (above 50°C). Keep away from strong oxidizers. Under these conditions, shelf life is typically at least 12 months from delivery. |
| Shelf Life | Shelf life is typically 2 years when stored dry, cool, and in original unopened packaging. |
Vestamid L2122 sw 9.7507 is extruded as a 100% PA12 compound for pneumatic brake lines in heavy-duty vehicles. The sw designation denotes black pigmentation; 9.7507 is the numeric colour reference. The material is dried in desiccant dryers at 80°C for 4–6 h to a residual moisture content below 0.10% before single-screw extrusion. Barrel set temperatures are 210°C at the feed throat, 225–235°C in the compression zone, and 235–245°C at the metering zone. Screw geometry is a 25:1–30:1 L/D barrier screw with a mixing section; screen packs are typically 60/80/100 mesh. Finished tube dimensions range from 8 mm to 16 mm outside diameter with 1.0–2.0 mm wall thickness. Vacuum calibration tanks with 20–30°C water are used. Dry-property tensile yield stress measured to ISO 527-2 on dry-as-moulded specimens governs burst margin calculations. Compliance is evaluated under SAE J844 for nonmetallic air brake tubing, including cold impact at -40°C and elevated-temperature burst retention. The 9.7507 black compound already contains UV-stabilised carbon black dispersion; no additional masterbatch is required. The terminal products are coiled air brake lines, straight truck chassis lines, and trailer hose assemblies.
In multilayer automotive fuel vapour tubing, the grade is coextruded as a PA12 outer jacket layer rather than as a monolayer. Typical layer distribution for a 6 mm outside diameter line uses 30–50% of the wall thickness as 100% L2122 sw 9.7507 outer jacket, 10–15% adhesion tie resin, 10–15% EVOH barrier resin, and 25–35% conductive PA12 inner layer. The conductive inner layer provides electrostatic dissipation, while the L2122 sw 9.7507 outer layer contributes impact resistance, low temperature flexibility, and chemical resistance. Coextrusion is run through a multilayer spiral-mandrel die with melt temperatures between 220°C and 250°C. Post-extrusion annealing at 130°C for 2 h is applied to stabilise pipe length. Compliance is assessed under SAE J2260 for low-permeation nonmetallic fuel tubing and against CARB LEV III evaporative emission limits. The dry property values for modulus and yield stress are used to calculate the outer layer contribution to crush strength and burst resistance. Terminal products are evaporative fuel feed and return lines for gasoline passenger cars, flex-fuel lines, and small engine fuel lines.
| Application segment | Governing standard or regulation | Dry-property input used for acceptance | Primary processing control variable |
|---|---|---|---|
| Heavy-duty pneumatic brake tubing | SAE J844 | Tensile yield stress per ISO 527-2 | Moisture content < 0.10% |
| Multilayer fuel vapour tubing | SAE J2260, CARB LEV III | Dry modulus and yield stress | Layer thickness 0.20–0.50 mm |
| Industrial pneumatic control tubing | ISO 14743 | Burst strength at 23°C | Diameter tolerance ±0.05 mm |
| Bonded flexible pipe pressure sheath | API Spec 17K | Hydrostatic design basis | Melt temperature 210–230°C |
Industrial pneumatic control tubing with outside diameters of 4–12 mm and wall thicknesses of 0.5–1.0 mm is extrusion-formed from 100% virgin L2122 sw 9.7507; closed-loop start-up regrind is limited to 15 wt% and only from the same grade. The line is processed on a single-screw extruder with L/D 25:1, a pressure-relief screen pack, and melt temperature 230–245°C. Laser or ultrasonic diameter gauges hold diameter tolerance within ±0.05 mm. Burst strength at 23°C is used as a dry-property release check based on ISO 527-2 tensile data. Fitting retention is evaluated according to ISO 14743 for push-in fittings used with thermoplastic tubes. The 9.7507 black colour provides UV resistance for machines exposed to plant lighting and outdoor enclosure conditions. Terminal products are pneumatic control lines for robotics, CNC machine tool air circuits, packaging machinery, and automated assembly stations.
Cable sheathing lines use L2122 sw 9.7507 in 100% as-received pellet form because the 9.7507 black colour already contains dispersed carbon black. Pressure tube extrusion or semi-tube extrusion is performed over copper or fibre cores at melt temperatures of 215–235°C. The crosshead die land length is selected to maintain sheath concentricity within ±0.03 mm. Cooling water temperature is held at 20–40°C to control post-crystallisation shrinkage. Dry-property elongation at yield and notched Charpy impact measured to ISO 179-1/1eA are used to define low-temperature impact resistance for cable jackets in cold-climate installations. Flammability is assessed under UL 94 HB. Terminal products are optical fibre loose-tube buffer jackets, automotive sensor cable sheaths, and industrial control cable jackets exposed to lubricants and hydraulic fluids.
When the grade is selected for bonded flexible pipe pressure sheaths, the polymer is extruded as a 100% virgin PA12 layer over a steel carcass or inner reinforcement structure. No regrind is permitted in pressure sheath layers requiring API Spec 17K qualification. Extrusion uses a large-diameter single-screw machine with L/D 30:1, a gear melt pump, and melt temperatures between 210°C and 230°C. Thickness control is maintained by laser scanning during crosshead extrusion. Post-extrusion hydrostatic testing at 1.5× design pressure provides initial pressure retention verification. Dry-property tensile strength and elongation from ISO 527-2 supply baseline values for hydrostatic design basis calculation. The black colour provides resistance to UV during deck storage. Published data for this specific configuration is limited; qualification must be confirmed per project-specific API Spec 17K testing. Terminal products are bonded flexible flowlines, lower-pressure riser sections, and offshore loading hose liners.
Injection moulding of L2122 sw 9.7507 for sports equipment components uses 100% virgin material, with moisture content below 0.10% prior to moulding. Melt temperature is 230–260°C; mould temperature is 50–70°C to promote crystallinity without excessive cycle-time loss. Holding pressure ranges from 60 MPa to 80 MPa. The dry-as-moulded Charpy impact strength at -30°C, measured to ISO 179-1/1eA, is the main criterion for cold-weather impact retention. Hardness measured to ISO 868 is used for surface scratch specification. The 9.7507 black compound eliminates post-moulding painting for most exterior components. Terminal products are ski boot shell inserts, snowboard binding highbacks, inline skate cuffs, and bicycle hydraulic hose clips.
Competitive Evonik Vestamid L2122 sw 9.7507 (dry properties) Nylon 12 prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615365186327 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8615365186327
Email: admin@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Evonik Vestamid L2122 sw 9.7507 is a high-viscosity polyamide 12 extrusion compound supplied as carbon-black-pigmented granules. The colour designation sw 9.7507 identifies the black masterbatch formulation used in the specific compound; dry-property data describe test results obtained after drying to a residual moisture content at or below 0.10 % by mass and before conditioning to equilibrium at 23 °C and 50 % RH in accordance with ISO 291. The dry-property distinction is operationally significant because polyamide 12 absorbs approximately 1.5 % water at saturation in 23 °C water under ISO 62, and a shift from dry to conditioned can reduce tensile modulus while increasing elongation and notched impact response.
The grade is specified as an unreinforced, high-molecular-weight polyamide 12 extrusion material. Representative dry-state mechanical values published for Evonik Vestamid L2122 sw 9.7507 are summarised below; lot-specific variation and pigment-concentrate lot changes require verification against the current Evonik material datasheet.
| Property | Test standard | Unit | Dry value |
|---|---|---|---|
| Density at 23 °C | ISO 1183-1 | g/cm³ | 1.01 |
| Melt volume-flow rate at 235 °C/2.16 kg | ISO 1133-1:2022 | cm³/10 min | 10 |
| Tensile modulus | ISO 527-1/-2 | MPa | 1500 |
| Yield stress | ISO 527-1/-2 | MPa | 38 |
| Yield strain | ISO 527-1/-2 | % | 8 |
| Nominal strain at break | ISO 527-1/-2 | % | >50 |
| Charpy notched impact strength at 23 °C | ISO 179-1/1eA | kJ/m² | 8 |
| Charpy notched impact strength at −30 °C | ISO 179-1/1eA | kJ/m² | 6 |
| Melting temperature, DSC | ISO 11357-3 | °C | 176 |
| Vicat softening temperature, A/50 | ISO 306 | °C | 140 |
| Water absorption at saturation, 23 °C | ISO 62 | % | 1.5 |
Water uptake is the first variable that separates dry property data from conditioned service data in polyamide 12. The dry-state tensile modulus near 1500 MPa is commonly used in extruded tube collapse-pressure calculations, while the conditioned value controls long-term service deflection in humid environments. Because the carbon-black-pigmented compound is processed below 0.10 % residual moisture, the dry data set provides the correct baseline for initial part qualification, wall-thickness optimisation, and screw-design calculations. Pre-drying is nevertheless required when incoming granules exceed the specified moisture limit. A desiccant dryer with a dew point of −30 °C or lower, an air temperature of 80 °C, and a residence time of 4–6 h is the standard drying recommendation. Uncontrolled hot-air drying without dew-point control is unsuitable because atmospheric moisture can be reintroduced during cooling.
Commercial twin-screw extrusion lines running this grade typically operate with barrel temperatures from 180 °C at the feed zone to 245 °C at the die, with melt temperature measured at the die adapter between 220 °C and 250 °C. The high-viscosity molecular weight distribution provides melt strength during vacuum calibration of tubing, but it also raises head pressure on small-diameter dies. Extruders with an L/D ratio of 25:1 to 30:1 and compression ratios in the range of 2.5:1 to 3.5:1 are commonly used. Screen packs with 60/80/100 mesh are installed on production lines to remove pigment agglomerates and incidental contamination. Residence time above 15 min at melt temperature should be avoided because thermal degradation reduces melt strength and creates black specks in the extrudate.
Injection moulding of low- to medium-complexity clips and connectors from this grade is performed on clamp systems from 800 kN to 1,500 kN, with barrel temperatures from 230 °C to 260 °C and mould temperatures from 40 °C to 80 °C. Holding pressure must compensate for the semicrystalline volumetric shrinkage of polyamide 12, which is anisotropic and typically in the range of 0.7 % to 1.1 % depending on wall thickness and gate location. Flow simulation data for this specific black-pigmented high-viscosity grade under gas-assisted injection moulding is limited; process development therefore relies on in-house capillary rheometry and pilot-tool trials.
Tubular automotive systems—fuel vapour lines, compressed-air brake tubing, and hydraulic hose jackets—specify this grade because the high-viscosity melt provides dimensional control during vacuum calibration and the carbon-black package provides ultraviolet resistance for exposed routing. In cable sheathing, the dry-state modulus near 1500 MPa allows thin-wall extrusion while maintaining crush resistance; the saturated-state impact response remains sufficiently ductile for low-temperature installation. The grade is also used for extruded profiles in which low moisture uptake and resistance to zinc chloride are required.
In applications where PA 6 or PA 66 is limited by moisture absorption, polyamide 12 offers a lower amide-group density and therefore reduced water affinity. The saturation uptake of approximately 1.5 % for Vestamid L2122 sw 9.7507 compares with values around 8–9 % for unreinforced PA 6 and PA 66 under the same exposure conditions. This lower uptake produces better dimensional stability in humid service and more stable electrical response. The dry tensile modulus of polyamide 12 is lower than that of dry PA 66, but the margin narrows after conditioning because PA 66 loses a larger fraction of its dry-state stiffness. For applications requiring chemical resistance to road salts, zinc chloride, and automotive fluids, the longer aliphatic chain provides a barrier advantage over shorter-chain polyamides. The carbon-black grade also provides ultraviolet stabilisation in exposed routing applications where natural PA 12 would embrittle more rapidly.
Within the Evonik Vestamid L family, the L2122 designation places the grade in the high-viscosity extrusion segment. Relative to lower-viscosity injection-moulding grades, L2122 requires higher melt temperatures and generates higher extruder head pressure. Relative to carbon-black-free natural grades, the sw 9.7507 variant provides additional ultraviolet-weathering resistance but may show slightly reduced elongation because of pigment-related stress concentration. Relative to unreinforced PA 6 and PA 66, it offers lower moisture uptake and better retention of dry-state toughness at sub-zero temperatures. Compared with glass-filled polyamide 12 grades, L2122 sw 9.7507 has lower tensile modulus and substantially higher elongation at break, which makes it more suitable for flexible tubing and cable jacket applications. Compared with plasticised polyamide 12 grades, it exhibits higher dry-state stiffness and lower low-temperature elasticity, and it is selected where greater dimensional stability is required.
At incoming inspection, pellet moisture is verified by Karl Fischer titration or loss-on-drying; lots above 0.10 % moisture require drying before processing. The compound should not be stored in open silos at relative humidity above 60 %. Re-dried material should not be blended with virgin granules in proportions above 20 % without prior rheological verification, because carbon-black concentrate degradation can shift melt viscosity and reduce tube burst pressure. Lots with melt volume-flow rate outside the statistical process control window should not be used for thin-wall tubing without verification of extruder head pressure and wall-thickness capability.
