| HS Code | 723344 |
| Density | 1.02 g/cm³ |
| Melt Volume Flow Rate | 5 cm³/10 min at 235°C, 2.16 kg |
| Water Absorption 24h 23 C | 0.25 % |
| Tensile Modulus | 1350 MPa |
| Tensile Strength At Yield | 44 MPa |
| Elongation At Break | >200 % |
| Flexural Modulus | 1200 MPa |
| Charpy Impact Strength Notched 23 C | 6 kJ/m² |
| Charpy Impact Strength Notched 30 C | 4 kJ/m² |
| Melting Temperature | 176 °C |
| Vicat Softening Temperature B 50 | 165 °C |
| Heat Deflection Temperature 0 45 Mpa | 120 °C |
As an accredited Arkema Rilsamid AESN BLACK T6L PA12 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg sealed bag of Arkema Rilsamid AESN BLACK T6L PA12 granules, moisture-protected packaging for safe handling and storage. |
| Container Loading (20′ FCL) | 20′ FCL shipment of Arkema Rilsamid AESN BLACK T6L PA12, palletized bags securely loaded, weight optimized, protected from moisture, ready for safe transport. |
| Shipping | Arkema Rilsamid AESN BLACK T6L PA12 is a polyamide 12 grade supplied as black granules in sealed, moisture-proof bags. Ship as non-hazardous dry bulk or palletized cargo. Keep dry, avoid direct sunlight and excessive heat, store in ventilated area. Use clean equipment; no special transport classification required. |
| Storage | Store Rilsamid AESN BLACK T6L PA12 in its original, unopened packaging in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and moisture. Keep the container tightly sealed when not in use to prevent water absorption and contamination. Standard shelf life is typically 12 months under recommended conditions. |
| Shelf Life | Shelf life is typically 2 years from manufacture if stored dry, cool, and in original unopened packaging. |
In heavy-duty truck air brake assemblies, the specification window for polyamide 12 tubing is dominated by burst-pressure retention after heat ageing and zinc chloride stress-crack resistance, because air brake lines are exposed to road salts, diesel aerosol, and underbody thermal cycling from -40 °C to 80 °C. Rilsamid AESN BLACK T6L is metered as 100 wt% virgin resin at the main feed throat of an extrusion line with a 30:1 L/D single-screw extruder, a vacuum vent at -0.08 MPa, and a gear pump to suppress surging; internally generated regrind is limited to 20 wt% and is blended only in the outer layer after the regrind has been re-dried at 80 °C for 6 h to a residual moisture below 0.08%. Compliance testing is carried out against SAE J844 and ISO 7628-1 where applicable, with additional tensile verification per ISO 527-2 and melt mass-flow rate monitoring per ISO 1133-1:2022 at 235 °C under 5.0 kg. Melt temperature at the die is maintained between 225 °C and 245 °C; excursions above 260 °C produce oxidative yellowing and a measurable loss in burst pressure after 72 h at 100 °C. Downstream production uses a basket-style water bath at 20 °C to 40 °C, ultrasonic wall-thickness scanning, and cut-to-length winders producing tube outside diameters from 4 mm to 16 mm. Terminal product types include tractor-trailer air brake lines, cab suspension control tubing, and pneumatic gear-shift lines for heavy commercial vehicles.
| Test standard | Test condition | Acceptance criterion |
|---|---|---|
| SAE J844 | Room-temperature burst | Minimum burst pressure according to tube size class |
| ISO 7628-1 | Heat ageing 72 h at 100 °C | No cracking or leakage after ageing |
| ISO 527-2 | Tensile speed 50 mm/min | Yield stress and elongation at break within material specification |
| ISO 1133-1:2022 | 235 °C, 5.0 kg | Melt volume-flow rate within supplier control range |
From cable sheathing trials using black PA12 on a 45 mm single-screw extruder with a pressure-type crosshead, the critical processing conflict is between insulation adhesion and surface gloss: low draw-down ratios below 1.3:1 produce a loose jacket that fails tightness testing, while draw-down ratios above 2.5:1 induce tensile orientation that raises shrinkage above 1.0% after 15 min at 150 °C in accordance with IEC 60811-501. Rilsamid AESN BLACK T6L is introduced as 100 wt% pre-compounded black resin at the hopper, with a maximum 15 wt% clean process regrind permitted only after moisture re-conditioning at 80 °C for 4 h to below 0.08%; the carbon black loading is verified by ash content per ISO 3451-1, with published general PA12 jacketing data placing typical carbon black content between 2.0 wt% and 3.0 wt% for UV-stable industrial sheathing. Melt temperature is controlled at 230–245 °C with a screw cooling zone at 60 °C, and conductor pre-heating at 60 °C to 80 °C prevents internal voids. The line includes a 0.02 mm eccentricity gauge, a dual-zone water trough at 30 °C, and a post-extrusion spark tester operating at 2.5 kV. Published long-term thermal ageing data for this specific black PA12 grade in thin-wall cable applications is limited; qualification should therefore include cable-level heat ageing per ISO 6722-1:2022 rather than relying on resin datasheet values alone. Terminal product types include unshielded sensor cable jackets for off-highway equipment, control cable sheathing in exposed industrial installations, and locomotive jumper cable covers.
When fiber-optic loose tubes are extruded at line speeds above 400 m/min, the controlling response variables are post-extrusion shrinkage and crush resistance, because a loose tube must protect single-mode fiber without inducing attenuation increase above the cable design budget. Rilsamid AESN BLACK T6L is processed as 100 wt% virgin material; regrind is generally excluded from loose-tube lines because even low-level contamination raises the incidence of pinholing at wall thicknesses below 0.15 mm. The extrusion line for fiber loose tubes typically uses a 30:1 L/D single-screw extruder with a high-precision gear pump, a crosshead die with a tip/die land ratio of 3:1, and a vacuum calibration sleeve; melt temperature is held within the narrow 225–235 °C window because lower temperatures raise die pressure and swell, while higher temperatures produce polymer degradation marks that fail visual inspection under 10x magnification. Drying is mandatory at 80 °C for 6–12 h to below 0.06% moisture, and online diameter control by laser gauge maintains a wall thickness tolerance of ±0.01 mm. Dimensional compliance for the loose tube is checked after 24 h conditioning at 23 °C and 50% relative humidity per IEC 60794-1-2; crush resistance is assessed according to the applicable cable construction standard, and pass values are material- and wall-thickness-dependent. Terminal product types include dry loose-tube elements for outdoor fiber-optic cables, micro-module tubes for high-density cable bundles, and central loose tubes for duct cable assemblies.
In diesel fuel vapor return lines operating in the 60 °C to 80 °C range, condensates containing aliphatic hydrocarbons, fatty acid methyl esters at up to 7 vol% in some markets, and acidic residues drive the selection of PA12 over PA6 because of lower moisture absorption and higher retention of elongation after 1,000 h diesel immersion at 80 °C. Rilsamid AESN BLACK T6L is run at 100 wt% virgin resin in the inner contact layer, with no more than 20 wt% regrind in an outer abrasion layer; the inner layer is dried to below 0.06% moisture and processed on a coextrusion line with a grooved-feed extruder of 25:1 L/D and melt temperature 225–240 °C. Chemical resistance is evaluated by immersion per ISO 175, while automotive fuel-system tubing requirements are referenced to SAE J2260 where applicable. Production includes an inline bubble detector and a burst pressure station that verifies room-temperature burst above 4.0 MPa for a 6 mm outside diameter line; after heat ageing at 100 °C for 168 h, the retained burst pressure must not drop more than 10%. Terminal product types include diesel fuel return tubing, fuel-vapor purge lines for commercial vehicle evaporative systems, and low-pressure vent lines for fuel tanks.
Because push-to-connect pneumatic fittings incorporate multiple knit lines at threaded ring and port intersections, weld-line bursting under cyclic pressure becomes the primary failure criterion. Rilsamid AESN BLACK T6L is metered as 100 wt% virgin pellets with 20 wt% maximum regrind from sprues and runners, provided the regrind is kept below 0.10% moisture and not subjected to more than two additional heat cycles. The injection moulding process uses a 40 mm three-zone screw with a 20:1 L/D ratio, a reverse-taper nozzle, and a barrel temperature profile from 220 °C at the feed throat to 245 °C at the nozzle; mould temperature is held at 50 °C to 70 °C, and clamping force for multi-cavity tools ranges from 600 kN to 1,200 kN depending on cavitation. Knit-line tensile strength is verified by tensile testing per ISO 527-2 on bars gated at both ends, with a minimum retained strength of 70% relative to the unknit reference; pressure cycling is performed at 1.5 MPa for 1,000,000 cycles per ISO 14743, with no crack initiation at the thread root. Because unfilled PA12 has lower creep resistance than glass-filled grades, the operating pressure is limited to 1.0 MPa at 60 °C; higher-pressure circuits require a glass-filled alternative. Terminal product types include push-to-connect fittings for 4–16 mm tubing, flow control throttle bodies, and modular distribution blocks for factory automation.
After gate freeze time drops below 2 s in tools with cold runner diameters of 1.5–2.0 mm, shrinkage variation across a multi-cavity underhood clip mould increases, and bosses may fall below the 4% moisture-conditioned elongation at break threshold. Rilsamid AESN BLACK T6L is run at 100 wt% virgin resin with up to 25 wt% in-house regrind, dried to below 0.08% moisture at 80 °C for 4–6 h. Barrel zone set points are 230 °C feed, 240 °C compression, 245 °C metering, and 240 °C nozzle, with a mould temperature of 60–80 °C; hold pressure is set to 40–60 MPa until gate freeze is confirmed by weight stability within 0.2% shot-to-shot. Compliance testing for zinc chloride stress-crack resistance follows ISO 22088-3 bent-strip method after the parts are immersed in 50 wt% zinc chloride solution for 48 h at 23 °C; low-temperature impact is checked at -40 °C after 1,000 h heat ageing at 100 °C per ISO 179-1/1eA. Published data for this specific black grade under combined zinc chloride and fuel vapour exposure is limited, so moulders are advised to qualify parts against the final OEM specification rather than extrapolate from general PA12 data. Terminal product types include underhood harness routing clips, fuel-line retaining brackets, and body-mounted cable retainers.
Competitive Arkema Rilsamid AESN BLACK T6L PA12 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!
Under the specification Arkema Rilsamid AESN BLACK T6L PA12, the material is a black-pigmented, heat-stabilized, lubricated semi-crystalline polyamide 12 compound. The commercial designation identifies a grade within the Rilsamid PA12 injection-molding and extrusion portfolio in which the T6L suffix indicates a heat-stabilization and internal-lubrication package intended to reduce melt pressure, improve release on fast-cycling molds, and widen the service temperature window relative to unmodified polyamide 12. The product is specified in applications where low equilibrium moisture uptake, low specific gravity, and resistance to aliphatic hydrocarbons and zinc chloride solutions are required. Typical conversion routes include high-speed injection molding of automotive underhood clips, electrical connectors, and pneumatic tube fittings, as well as extrusion of pneumatic tubing and cable sheathing. The black pigmentation provides ultraviolet screening in secondary assembly, but it can lower surface resistivity relative to natural PA12 and should not be assumed to meet electrostatic dissipative requirements without lot-specific surface resistance data.
The T6L suffix should not be read as a generic color code. It designates a heat-stabilized, lubricated black grade within the AESN family. Lot-specific melt viscosity must be obtained from the certificate of analysis, but the product family typically falls within a melt volume-flow rate range of 8–15 cm³/10 min when measured at 235°C under a 5-kg load per ISO 1133-1:2022. Dry-as-molded density is generally 1.01–1.03 g/cm³ per ISO 1183-1:2019. By differential scanning calorimetry per ISO 11357-3:2018, melting temperature is typically 175–179°C, while the dry-state glass transition temperature is approximately 45–55°C per ISO 11357-2:2020. These transitions place the material below the PA66 processing window and above commodity polyolefins, allowing standard water-heated injection molds to be used for wall thicknesses up to 3–4 mm.
Pre-drying of the granulate is required before melt processing. A desiccant dryer set to 80–90°C with a closed-loop air dew point of −30°C or lower for 4–6 h reduces residual moisture to ≤0.10% by Karl Fischer titration; processing above this value can depress melt viscosity, generate splay on part surfaces, and reduce tensile elongation after molding. For hoppers open to plant air at relative humidity above 60%, dry-air conveying and maximum hopper residence times of 20–30 min are recommended. On production-scale injection molding lines, inadequate drying has been observed to cause gate blush, occasional gate stringing, and intermittent melt fracture at high screw speeds. A general-purpose single-stage screw with an L/D ratio of 20:1 to 24:1 and a compression ratio of 2.5:1 to 3.0:1 is acceptable; the unfilled melt is non-abrasive, but carbon black can increase wear on gate tips and check rings at back pressures above 1.5 MPa.
Barrel temperature profiles for medium-viscosity PA12 typically start at 220°C in the rear zone, 230–240°C in the center, 240–250°C in the front, and 250–260°C at the nozzle. Mold temperature is maintained between 20°C and 80°C, with lower temperatures used for thin-walled parts and higher values for thick sections requiring low post-mold shrinkage. Hold pressure is commonly 40–60% of injection pressure, and screw back pressure of 0.5–1.5 MPa stabilizes shot mass. For wall thicknesses below 1 mm, melt temperature near 260°C and fast injection velocity are required to avoid premature freeze-off; for sections above 3 mm, lower mold temperatures and longer packing time reduce sink marks. Because PA12 crystallizes more slowly than PA66, pack-and-hold time must be confirmed by gate-freeze and part-weight studies rather than by screw position alone.
Semicrystalline PA12 exhibits anisotropic mold shrinkage because flow-induced orientation and cooling rate vary across the part. Mold shrinkage in the flow direction is typically 0.7–1.2%, and transverse shrinkage is 0.8–1.4% per ISO 294-4; the black pigmentation can increase or decrease the differential depending on gate shape and part thickness. Post-mold shrinkage after 24 h at 80°C can add 0.1–0.3%. Toolmakers should accommodate differential shrinkage in gate-to-weld-line regions; thinner walls freeze faster and show lower crystallinity, which reduces local shrinkage but also lowers tensile modulus. For tight-tolerance components, a dimensional capability study across 30–50 shots is required to separate material variability from mold-temperature drift.
In high-speed molding of black PA12, gate blush and weld-line cracking are observed when mold temperature is below 20°C or when screw recovery speed exceeds 150 rpm. Clamp force requirements for multicavity tools follow projected area multiplied by cavity pressure; typical cavity pressure at gate freeze is 30–50 MPa, so a tool with 200 cm² projected area may require approximately 600–1,000 kN clamp force, though runner layout and wall thickness shift this value. Nozzle tips should use reverse-taper shutoff to avoid stringing; hot-runner systems require balanced gates because the lubricant package can reduce melt viscosity and promote uneven fill if gate diameters vary by more than 0.1 mm.
PA12 contains one amide group per twelve methylene units, reducing hydrogen-bond density relative to PA6 and PA66. Water absorption at saturation is therefore lower by a factor of roughly five to seven. Under immersion at 23°C per ISO 62, PA12 saturation is typically 1.5–2.0%, while PA6 absorbs 9.5–10.5% and PA66 absorbs 7.5–8.5%. At 50% RH and 23°C, PA12 moisture content is commonly 0.7–1.0%, compared with 2.5–3.0% for PA6. The practical consequence is less dimensional swelling, a smaller plasticization-induced modulus loss, and reduced hydrolytic chain scission in humid air or water-glycol environments. This behavior is a primary reason the grade is selected for fuel-vapor lines, pneumatic circuits, and cable jackets exposed to condensation.
For preliminary design, the following property ranges are drawn from the Rilsamid PA12 injection-molding and extrusion family; they are not lot release limits. The black, heat-stabilized, lubricated formulation can shift notched impact and surface resistivity relative to natural PA12 grades. Lot-specific certificates should be used for safety-critical dimensions.
| Property | Test method | Rilsamid AESN BLACK T6L typical range | PA6 typical range | PA66 typical range |
|---|---|---|---|---|
| Density | ISO 1183-1 | 1.01–1.03 g/cm³ | 1.12–1.14 g/cm³ | 1.13–1.15 g/cm³ |
| Tensile modulus, dry | ISO 527-1/-2 | 1200–1500 MPa | 2800–3300 MPa | 2800–3200 MPa |
| Tensile yield strength | ISO 527-1/-2 | 40–50 MPa | 75–85 MPa | 80–90 MPa |
| Nominal strain at break | ISO 527-1/-2 | >50% | 20–40% | 20–30% |
| Notched Charpy impact, 23°C | ISO 179/1eA | 4–8 kJ/m² | 4–6 kJ/m² | 5–7 kJ/m² |
| Notched Charpy impact, −30°C | ISO 179/1eA | 3–5 kJ/m² | 2–4 kJ/m² | 2–3 kJ/m² |
| Melting temperature | ISO 11357-3 | 175–179°C | 220–225°C | 260–265°C |
| Heat deflection temperature, 0.45 MPa | ISO 75-2/B | 130–150°C | 170–190°C | 200–220°C |
| Water absorption saturation | ISO 62 | 1.5–2.0% | 9.5–10.5% | 7.5–8.5% |
Electrical performance is strongly moisture- and carbon-black-dependent. Volume resistivity at 23°C and 50% RH generally falls between 1 × 1012 and 1 × 1013 ohm·m per IEC 62631-3-1, but the carbon black in AESN BLACK T6L can reduce surface resistivity by one to two decades relative to natural PA12. Dielectric strength measured on 1 mm specimens is typically 20–25 kV/mm per IEC 60243-1. When electrostatic dissipative behavior is required, a lot-level surface resistance measurement per IEC 62631-3-2 is necessary, and weld-line zones should be checked because carbon-black-rich regions can create measurable resistance gradients.
The AESN black pigmentation improves ultraviolet weathering resistance relative to natural PA12 for outdoor secondary operations, but carbon black alone does not provide complete UV stabilization of the polymer matrix. Long-term outdoor exposure can cause surface chalking and a decline in elongation at break. Xenon-arc weathering per ISO 4892-2 after 500 h can reduce elongation by 20–40% depending on irradiance and specimen thickness; tensile modulus usually remains more stable. For components requiring mechanical integrity, visual inspection is insufficient because the black surface can mask oxidative microcracking.
At subzero temperatures, PA12 retains ductility better than many aliphatic polyamides. Notched Charpy impact at −30°C is commonly 3–5 kJ/m² dry-as-molded per ISO 179/1eA, and thin-walled sections can remain ductile down to approximately −40°C. This low-temperature response supports pneumatic tubing in cold-climate truck and bus systems, but the black concentrate can shift the brittle-ductile transition by a few degrees; lot-specific low-temperature impact verification is recommended for parts thinner than 1 mm.
Resistance to aliphatic hydrocarbons, diesel fuel, biodiesel blends, zinc chloride solutions, and many industrial oils is a primary specification driver. Under ISO 1817, volume swell in automotive diesel fuel at 60°C is commonly below 2–5% depending on biodiesel fraction and test duration; aggressive oxygenated fuels can produce higher uptake, and published data for this specific configuration is limited for such fluids. The lower moisture uptake of PA12 also reduces water-induced interfacial attack in fuel-line connectors, but continuous exposure to strong acids, phenolic compounds, or polar solvents can hydrolyze or plasticize the amide linkage. Component validation for fuel contact should follow ISO 1817 or SAE J2260 depending on the assembly specification. In combined humidity and hydrocarbon service, dimensional change is governed more by absorbed water than by hydrocarbon swell after initial saturation, due to the polarity of the amide group.
For pneumatic tube and cable-sheathing extrusion, the T6L lubricant package can reduce melt-pressure fluctuation and die build-up. A single-screw extruder with an L/D ratio of 24:1 to 30:1, a three-zone screw with mixing pins, and a melt pump is commonly used. Melt temperature is maintained at 220–260°C, with die head settings of 230–250°C. Water-bath quenching for tubing typically uses 15–40°C water with a controlled air gap to prevent ovality. Closed-loop diameter control is required for tubing tolerances of ±0.05 mm; haul-off speed should be matched to melt pump output within 0.5–1.0%. Screen-pack pressure rise greater than 30% over an 8-h run indicates carbon black agglomerate or gel accumulation and requires screen pack replacement.
Compared with PA6 and PA66, PA12 reduces equilibrium moisture uptake because of lower amide group concentration. PA6 offers higher dry tensile modulus and lower raw material cost, but its moisture-induced modulus loss after conditioning can exceed 30%. PA66 provides higher heat deflection temperature and better dry-state strength, but it requires higher melt temperatures and exhibits greater low-temperature notch sensitivity. Against PA11, PA12 shows a slightly lower melting temperature and comparable low-water-absorption behavior; PA11 may offer a higher bio-based carbon fraction depending on monomer source, while the AESN BLACK T6L grade is specified for its heat-stabilized black formulation and consistent release behavior in high-speed injection molding. Within the Rilsamid PA12 portfolio, AESN BLACK T6L differs from natural AESNO grades by the carbon black and lubricant package; from P20 and P40 suffix variants by melt viscosity and processing orientation; from glass-fiber-reinforced PA12 grades by lower modulus and higher elongation; and from plasticized flexible PA12 by higher heat deflection temperature and reduced low-temperature flexibility.
Below the glass transition temperature, segmental motion is hindered, and the dry polymer exhibits a high creep modulus. The dry-state Tg of PA12 is 45–55°C, so components operating above 60°C enter the rubbery plateau where short-term modulus declines. Absorbed moisture depresses Tg further; 2% absorbed water can lower Tg by 10–15°C. Design of precision snap-fit assemblies therefore requires creep modulus and stress relaxation data at maximum service temperature and moisture condition, not dry-as-molded tensile modulus. For continuous exposure above 100°C, heat-stabilized PA12 retains utility for limited durations, but oxidative embrittlement becomes thickness-dependent. Published data for heat-stabilized PA12 after 1,000 h at 150°C show tensile strength retention of 50–80% depending on air circulation and specimen thickness. Applications above 130°C should use accelerated aging per ISO 188 or UL 746B; specific lot data for this black, lubricated configuration are not available in public literature.
Compliance status for the AESN BLACK T6L grade should be confirmed against the current Safety Data Sheet and product datasheet. The base PA12 polymer can be selected to meet REACH and RoHS 2011/65/EU obligations, but the carbon black concentrate and internal lubricant package require lot-specific declarations. FDA 21 CFR 177.1500 addresses nylon resins for food contact, yet the black grade may not be cleared for all food-contact uses. For medical or drinking-water components, extractables testing per ISO 10993 or applicable drinking-water standards is necessary. Substituting this black grade for a natural PA12 can alter weld-line strength and notched impact by 10–20% due to carbon black nucleation and filler-polymer interface effects, so weld-line locations should be validated by short-shot studies before mold release.
