| HS Code | 599606 |
| Density | 1.04 g/cm³ |
| Melting Point | 168 °C |
| Water Absorption 24h 23 C | 0.8% |
| Tensile Strength At Yield | 38 MPa |
| Elongation At Break | 300% |
| Flexural Modulus | 300 MPa |
| Charpy Notched Impact Strength 23 C | No break |
| Shore Hardness | 57 Shore D |
| Vicat Softening Temperature B50 | 110 °C |
| Volume Resistivity | 1.0E+13 Ohm·cm |
As an accredited Arkema Rilsamid AESN BLACK P202 CTL PA12-I-CD factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg bag of Arkema Rilsamid AESN Black P202 CTL PA12-I-CD, black polyamide 12 granules, supplied in moisture-protective packaging. |
| Container Loading (20′ FCL) | 20′ FCL container loading of Arkema Rilsamid AESN BLACK P202 CTL PA12-I-CD, packed in sealed bags on pallets, secured for transport. |
| Shipping | Rilsamid AESN Black P202 CTL is a polyamide 12 resin supplied as granules. It is non-hazardous for transport. Ship in sealed, moisture-proof packaging, protected from heat and direct sunlight. Keep dry during transit and storage to prevent moisture absorption and preserve material quality. Standard dry cargo containers are suitable. |
| Storage | Store in original sealed packaging in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and ignition sources. Protect from moisture and humidity to prevent water pickup. Reseal partially opened bags tightly. Recommended storage temperature below 50°C (122°F). Use first-in, first-out inventory to avoid prolonged storage. |
| Shelf Life | Shelf life is typically 3 years when stored in its original, unopened packaging, kept cool, dry, and away from sunlight. |
Application scenarios for Arkema Rilsamid AESN BLACK P202 CTL PA12-I-CD are restricted to converted components in which impact-modified, carbon-black-filled polyamide 12 is processed by extrusion or injection moulding. The grade designation PA12-I-CD under ISO 1043-1 denotes an impact-modifier package and carbon-black incorporation. Unlike PA6 and PA66, PA12 exhibits equilibrium moisture absorption near 1.5 wt% at 23 °C, which stabilizes dimensional and electrical behaviour in under-hood, pneumatic, and fuel-contact service. The following scenarios distinguish downstream sectors by process boundary, lot acceptance parameter, and terminal part geometry. Processing values are industrial operating ranges for PA12-I-CD feedstocks and do not replace lot-specific certificates of analysis or Arkema processing data.
In automotive fuel vapor return and tank vent tubing, carbon-black-filled impact-modified PA12 is specified for the inner conductive layer of low-permeation multilayer constructions. The carbon-black dispersion creates a static-dissipative path that prevents charge accumulation during high-velocity fuel vapor flow and reduces ignition risk in gasoline evaporative emission systems. Industry compliance is anchored to SAE J2260 for low-permeation fuel filler and vapor line assemblies, SAE J1645 for electrostatic dissipation in fuel systems, DIN 73378-1 for polyamide tubing in motor vehicles, and ISO 19013-1 where applicable to fuel circuit hoses. When used as the inner conductive layer, the grade is processed neat at 100 wt%; typical inner-layer thickness is 0.05 mm to 0.20 mm within a five-layer coextrusion comprising PA12 outer, barrier resin, tie resin, barrier resin, and conductive PA12 inner. Outer-layer thickness is commonly 0.7 mm to 1.0 mm, while the barrier layer is held at 0.08 mm to 0.15 mm depending on evaporative emission target. Production on a five-layer coextrusion line uses grooved-feed single-screw extruders with 24:1 to 30:1 L/D and barrier screws; melt temperature for the conductive PA12 layer is maintained at 230 °C to 250 °C, while the outer PA12 layer runs at 215 °C to 240 °C. Pre-drying in a desiccant dryer at 80 °C to 90 °C for 6 h to 8 h to a moisture content below 0.08 wt% is mandatory; moisture above 0.12 wt% produces hydrolysis-induced surface splay, localized brittleness, and inconsistent carbon-black wetting. Vacuum calibration with closed-loop diameter control at −0.4 bar to −0.8 bar stabilizes ovality below 0.10 mm. Carbon-black agglomerates larger than 30 µm generate high-resistance points above 10⁶ Ω in finished hose assemblies and are rejected by in-line spark testing at 3 kV to 5 kV. Terminal parts include fuel vapor return lines, EVAP canister purge lines, tank vent hoses, and filler-neck vent tubes with outside diameters from 6 mm to 25 mm. Processing temperatures above 270 °C are outside the stable window because carbon-black surface oxidation and PA12 chain scission increase resistivity variance and reduce burst strength.
For heavy-duty truck pneumatic brake tubing, the compound is processed as a monolayer tube at 100 wt% because impact modification in PA12-I-CD shifts the ductile-to-brittle transition below −40 °C, which is the critical validation point in SAE J844 cold-impact testing. The carbon-black filler stabilizes ultraviolet degradation in chassis-exposed runs, while PA12 chemistry reduces equilibrium moisture to roughly 1.5 wt%, preserving burst strength after wet-air exposure. Specification compliance is assessed under SAE J844 Type A/B for coiled air-brake tubing, ISO 7628-1 for coiled air lines, and 49 CFR 571.106 for brake hose and tubing assemblies. Formulation addition is neat at 100 wt%; in-plant regrind from dimensional rejects may be reintroduced up to 20 wt% only if dried to below 0.08 wt% moisture and blended on a gravimetric metering station. Extrusion is carried out on a single-screw extruder with 24:1 to 30:1 L/D, grooved feed section, barrier screw, and melt pump; melt temperature is 235 °C to 255 °C, and the die is maintained at 240 °C to 250 °C. Internal air sizing at 0.05 bar to 0.20 bar forms the tube through a vacuum tank with −0.2 bar to −0.5 bar. Terminal products include 6 mm to 16 mm outside diameter coiled air brake tubing, air suspension leveling lines, and trailer gladhand pigtails. Process failures observed on production lines include out-of-round sections when water bath temperature drops below 15 °C and melt fracture when line speed exceeds 80 m/min on 8 mm outside diameter lines; both parameters should be controlled by closed-loop haul-off feedback and multizone water baths.
Corrugated protective conduits for high-voltage cables in electric vehicles require a surface resistivity window that is neither fully conductive nor insulating, because charge accumulation on insulating PA12 surfaces can produce arc tracking near cell-interconnect busbars. In this application, the carbon-black network in PA12-I-CD is used at 100 wt% when the target surface resistivity measured according to ASTM D257 falls between 10² Ω/sq and 10⁶ Ω/sq at 500 V DC. If the system requires a higher static-dissipative range from 10⁶ Ω/sq to 10⁹ Ω/sq, the grade may be dry-blended with an unreinforced PA12 extrusion resin at a let-down of 30 wt% to 50 wt% of the carbon-black compound. Published lot-specific data for this exact configuration is limited; the indicative ranges below must be confirmed on production slabs before setting extrusion specifications. Industry compliance references for EV cable protection include IEC 60093 for volume and surface resistivity, ASTM D257 for DC insulation resistance, IEC 61340-5-1 for electrostatic control in technical installations, UL 94 HB for flammability classification, RoHS 2011/65/EU for restricted substances, and REACH (EC) 1907/2006 for registration and substance safety. The downstream production process uses a corrugator coupled to a single-screw extruder with melt temperature 235 °C to 255 °C, die temperature 230 °C to 245 °C, and cooling water at 20 °C to 40 °C. Pre-drying at 80 °C for 6 h to 8 h is required before corrugation because residual moisture above 0.10 wt% causes cell wall thinning and unstable pitch. Terminal products include high-voltage cable conduits in battery packs, fuel-cell bus cable channels, and industrial robot cable chains. Surface resistivity is measured on flat sections at three points per 100 m; measurements below 10⁶ Ω/sq indicate a conductive carbon-black network, while values above 10⁹ Ω/sq indicate an insulating surface that fails the static-dissipative requirement.
| Compound configuration | Indicative surface resistivity at 500 V DC (Ω/sq) | Test method |
|---|---|---|
| 100 wt% PA12-I-CD | 10²–10⁶ conductive region | ASTM D257 |
| 70 wt% PA12-I-CD / 30 wt% unreinforced PA12 | 10⁶–10⁹ static-dissipative | ASTM D257 |
| 50 wt% PA12-I-CD / 50 wt% unreinforced PA12 | 10⁹–10¹¹ transitional | ASTM D257 |
In under-hood injection-moulded routing clips and cable ties, the melt-viscosity profile of PA12-I-CD allows filling of thin-walled sections down to 0.8 mm without excessive pressure. The impact modifier prevents snap-fit fracture during assembly at engine-compartment temperatures below −20 °C, while carbon black provides ultraviolet resistance and dimensional stability. Compliance for mechanical properties is evaluated under ISO 527-1/-2 for tensile modulus and elongation, ISO 179-1/1eA for notched Charpy impact, ISO 4892-2 for Xenon-arc weathering, and UL 94 HB for flammability. Formulation addition is 100 wt% of the ready compound; regrind from runners and rejected parts may be added up to 20 wt% after drying to 0.08 wt% moisture. Injection moulding is carried out with melt temperature 240 °C to 270 °C, mould temperature 40 °C to 80 °C, and injection pressure 70 MPa to 100 MPa. Clamp force should be sized at 2 kN/cm² to 4 kN/cm² of projected area to prevent flash in multi-cavity hot-runner tools. Terminal products include engine-compartment cable ties, fuel-line routing clips, sensor brackets, and snap-in connector housings. Excessive mould temperatures above 80 °C extend cycle time without proportional crystallinity gain and may increase carbon-black migration to the weld line.
A workshop air hose inner liner made from PA12-I-CD is extruded directly onto a flexible mandrel before textile braiding and polyurethane jacketing. The inner liner must resist compressor oil mist, moisture, and repeated flexing at ambient temperatures from −20 °C to 60 °C. Compliance is tested under ISO 5774 for plastics hoses, textile-reinforced, for compressed air, and ISO 2398 for rubber hose, textile-reinforced, for compressed air where hybrid constructions are specified. The inner liner is processed at 100 wt% with wall thickness from 0.3 mm to 0.8 mm; thicker sections above 1.0 mm do not improve burst strength proportionally and increase flexural stiffness. Extrusion uses a single-screw extruder with L/D 24:1 to 28:1, melt temperature 230 °C to 250 °C, and mandrel temperature 20 °C to 30 °C. After braiding, an outer polyurethane or polychloroprene cover is crosshead-extruded at 190 °C to 220 °C. Terminal products include workshop compressed air hoses, rail vehicle pneumatic control lines, and mining pneumatic tool hoses. The PA12 liner is not intended for brake service; pressure ratings are limited by the textile reinforcement and end-fitting retention, not by liner melt strength.
Quick-connector bodies for fuel vapor and aqueous urea lines are gated at the centre boss to preserve knit-line strength in snap-fit retaining tabs. PA12-I-CD is processed at 100 wt% because the impact-modifier phase reduces notch sensitivity at the gate vestige and the carbon-black grade resists ultraviolet degradation on exposed locking tabs. Compliance for connector bodies references SAE J2044 for liquid fuel system quick-connect couplings, SAE J2045 for fuel line connector assemblies, and ISO 15500 where compressed gaseous fuel components are outside normal scope but relevant to test methodology. Injection moulding uses a melt temperature of 250 °C to 270 °C, mould temperature of 60 °C to 80 °C, and holding pressure of 60 MPa to 90 MPa to compensate for semicrystalline shrinkage from 0.008 mm/mm to 0.012 mm/mm. The downstream process requires pre-drying at 80 °C for 6 h to 8 h; moisture above 0.08 wt% produces surface splay on the O-ring sealing face and intermittent leakage in helium leak testing at 0.5 bar. Terminal products include fuel vapor quick connectors, EVAP canister purge-line fittings, SCR urea-line connectors, and retainer clips for under-hood fluid harnesses. The sealing surface should not be flame-treated or plasma-treated above 50 W·s/m² because excessive oxidation of the carbon-black-rich surface raises wetting angle variance and reduces O-ring lubricant adhesion.
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The product designated Arkema Rilsamid AESN BLACK P202 CTL PA12-I-CD is a black-pigmented, unplasticized polyamide 12 injection-moulding compound. The base resin is produced by ring-opening polycondensation of laurolactam, yielding a repeating unit of –[NH–(CH₂)₁₁–CO]–; the resulting amide-group density is one amide per 12 methylene units, which is lower than that of PA6 or PA66 and directly governs the resin’s equilibrium moisture uptake. Published data for the natural AESN base grade indicate a melt volume-flow rate in the range of 8 cm³/10 min to 15 cm³/10 min under ISO 1133-1 at 230 °C with a 2.16 kg load; the black P202 CTL variant normally exhibits a marginal reduction in melt flow due to carbon black nucleation. The compounded black material has a typical density of 1.03 g/cm³ to 1.04 g/cm³ under ISO 1183-1 and a melting peak in the range of 172 °C to 178 °C by differential scanning calorimetry under ISO 11357-3.
The PA12-I-CD designation identifies the polymer family, the injection-moulding processing route, and the controlled-lot or contractual documentation suffix. The exact meaning of the CD field and the CTL suffix is defined by Arkema product nomenclature and should be verified against the certificate of analysis for the delivered lot. The compound is supplied as cylindrical pellets with an apparent density of 0.55 kg/L to 0.65 kg/L under ISO 60. The material requires protection from relative humidity above 60% during open storage because polyamide 12 absorbs atmospheric moisture rapidly. Equilibrium moisture content at 23 °C and 50% RH is approximately 0.6% to 0.8%; at water saturation the value is approximately 1.2% to 1.5% under ISO 62. This uptake is significantly lower than the 9% to 10% saturation moisture of PA6 and the 8% to 9% saturation moisture of PA66.
The lower amide-group concentration in PA12 produces a set of performance trade-offs relative to short-aliphatic polyamides. Compared with PA6 and PA66, the PA12-I-CD grade has lower dry tensile modulus and yield stress, but markedly lower moisture uptake, lower density, and superior retention of low-temperature ductility. The density reduction relative to PA6 is approximately 8% to 10% at equal part volume. The lower hygroscopic swelling reduces dimensional shift in humid assembly environments and reduces the risk of stress-corrosion cracking in the presence of zinc chloride solutions, a known failure mode for PA6 and PA66. In comparison with natural AESN, the black P202 CTL variant is not conductivity-filled; the carbon black package provides ultraviolet screening and opacity without changing the base electrical insulation classification, though surface resistivity may be lowered by one to two decades relative to the unpigmented polymer.
| Property | Test method | Rilsamid AESN BLACK P202 CTL PA12-I-CD | PA6 | PA66 |
|---|---|---|---|---|
| Density | ISO 1183-1 | 1.03–1.04 g/cm³ | 1.12–1.14 g/cm³ | 1.13–1.15 g/cm³ |
| Water saturation at 23 °C | ISO 62 | 1.2–1.5% | 9–10% | 8–9% |
| Tensile modulus, dry | ISO 527-2 | 1300–1600 MPa | 2800–3200 MPa | 3000–3500 MPa |
| Charpy notched impact at 23 °C, dry | ISO 179-1/1eA | 5–10 kJ/m² | 4–8 kJ/m² | 4–7 kJ/m² |
| Heat deflection temperature at 1.8 MPa | ISO 75-2 | 50–60 °C | 65–75 °C | 70–80 °C |
Representative comparative ranges are compiled from publicly available datasheets for dry-as-moulded, unreinforced black or natural grades. These values are not lot-specific acceptance criteria. Within the Rilsamid PA12 range, AESN is an unplasticized injection-moulding grade with moderate melt flow; it is not equivalent to plasticized PA12 extrusion grades used for flexible tubing, where dry tensile modulus can fall below 400 MPa. The BLACK P202 CTL suffix is a colour and documentation designation, not a change in base polymer architecture. The material therefore retains the chemical and thermal profile of the AESN base resin, while the black pigment provides improved ultraviolet resistance for exterior components and can slightly reduce weld-line strength if the tooling and melt temperature are not optimized.
For injection moulding, the black P202 CTL compound must be dried to a residual moisture content below 0.08% by Karl Fischer titration under ISO 15512 before melt processing. A desiccant dryer set-point of 80 °C for 4 h to 8 h with a dew point of −30 °C or lower is sufficient for material entering the dryer below 0.20% moisture; longer drying is required if bulk material has been exposed to high humidity. The maximum recommended melt temperature is 260 °C, and the preferred melt temperature range is 230 °C to 250 °C measured at the nozzle. Prolonged residence time above 10 min at melt temperature causes oxidative yellowing and a reduction in notched Charpy impact, particularly in black-pigmented formulations where carbon black can increase heat absorption during screw recovery.
Mould temperature controls crystallinity and therefore dimensional stability. A cavity-wall temperature of 30 °C to 80 °C provides sufficient crystallization for demoulding and dimensional control; a mould temperature above 100 °C increases the crystalline fraction and raises heat deflection temperature but also increases cycle time and shrinkage anisotropy. Clamp-force requirements follow standard PA12 cavity-pressure behaviour: an estimated 4 kN to 6 kN per square centimetre of projected area is typical for technical components with wall thicknesses of 1.5 mm to 3.0 mm, though gate diameter, packing pressure, and flow-length ratio determine final part mass and sink-mark behaviour. General-purpose injection-moulding screws with L/D ratios of 20:1 to 25:1 and compression ratios of 2.5:1 to 3.5:1 are adequate for the AESN base. Peripheral screw speed should not exceed 0.3 m/s unless melt-temperature instrumentation confirms that adiabatic temperature rise is below the 260 °C degradation threshold.
Barrel temperature profiles typically begin at 200 °C to 220 °C in the feed zone, rise to 230 °C to 250 °C in the compression and metering zones, and hold the nozzle at 240 °C to 250 °C. Hot-runner systems with internally heated nozzles require independent temperature control at 240 °C to 250 °C to prevent cold slugs and pigment separation; valve-gated hot runners reduce stringing with the black P202 CTL grade. Back pressure in the range of 0.5 MPa to 1.0 MPa hydraulic is sufficient to maintain pigment dispersion without excessive shear heating. Regrind use should be limited to 20% to 30% by weight and only when the regrind has been properly dried and screened for contamination; higher regrind fractions reduce notched impact strength and increase melt-flow variation.
The AESN BLACK P202 CTL PA12-I-CD grade is intended for injection-moulded components that require a balance of low moisture uptake, hydrocarbon resistance, and low-temperature impact. Typical industrial uses include pneumatic quick-connectors, fuel-system clips, cable ties, electrical connector housings, and under-hood fasteners where PA6 or PA66 would undergo dimensional shift from moisture absorption. In pneumatic systems, PA12 fittings are specified for tubing connections because the material maintains dimensional stability across seasonal humidity cycles and resists zinc chloride solutions used in galvanized assemblies. Exposure to zinc chloride is a known stress-corrosion crack agent for PA6 and PA66; PA12 exhibits substantially lower susceptibility because of its lower amide density and lower hygroscopic swelling.
Chemical resistance of PA12-I-CD to aliphatic hydrocarbons, mineral oils, diesel fuel, brake fluids, and salt solutions is established under ISO 1817 immersion protocols. Prolonged exposure to strong mineral acids, phenols, cresols, and boiling water above 80 °C reduces molecular weight and should be avoided. Alcohol-based fuels containing aggressive organic solvents can plasticise the matrix and reduce tensile modulus by 20% to 40%, depending on concentration and temperature; compatibility testing under ISO 175 or SAE J1742 is required for each specific fuel blend. Low-temperature performance is governed by the relatively low glass transition temperature of PA12, normally reported between 40 °C and 55 °C for the dry resin under dynamic mechanical analysis at 1 Hz. Unlike PA6 and PA66, PA12 retains ductile failure at −30 °C because the beta relaxation associated with the methylene segments remains active below 0 °C. Notched Charpy impact values for the black PA12-I-CD at −30 °C are typically in the range of 4 kJ/m² to 7 kJ/m² under ISO 179-1/1eA, but the exact value depends on moisture conditioning and moulded-in stress. Parts with sharp internal corners or high gate-stress concentration may exhibit brittle failure even at room temperature if the moulded density is insufficient.
Electrical properties remain in the insulating range. Volume resistivity is typically above 1 × 10¹² Ω·m under IEC 62631-3-1, and comparative tracking index is normally 600 V under IEC 60112. The carbon black pigment may lower surface resistivity by one to two decades relative to natural AESN, but the black P202 CTL grade is not classified as conductive or antistatic. Applications requiring controlled electrostatic dissipation must use a dedicated conductive PA12 grade or validate part-specific surface resistivity after moulding. The black pigment does, however, provide ultraviolet screening that reduces surface embrittlement in exterior clips and connectors exposed to sunlight. Parts with tight tolerances below ±0.05 mm should be conditioned at 23 °C and 50% RH for at least 48 h before final dimensional inspection because moisture uptake shifts dimensions slightly even at equilibrium.
The black P202 CTL formulation is intended for technical articles; specific food-contact or drinking-water approvals must be confirmed for the exact delivery lot because carbon black quality and concentration can affect compliance. The base PA12 chemistry is covered by FDA 21 CFR 177.1500 for nylon resins and by European food-contact legislation for PA12 under Regulation (EU) No 10/2011 when the final composition meets the applicable migration limits, but the black colour package and any processing aids must be included in the overall migration assessment. REACH registration and RoHS Directive 2011/65/EU compliance are supplier-documented at the product level; users must verify that no additional post-treatment or compounding step triggers a new article classification.
Storage life is limited by moisture regain rather than oxidative degradation at ambient temperature. Bags should be resealed under nitrogen or dry air after opening, and inventory should be rotated on a first-in-first-out basis. If the material has absorbed moisture above 0.20%, re-drying at 80 °C for 8 h to 12 h is required; repeated drying cycles above 100 °C are not recommended because prolonged exposure to high temperature in the presence of oxygen leads to yellowing of the polyamide and a loss of molecular weight that reduces notched impact strength. Processing with hot-runner temperatures above 270 °C is outside the recommended window and may generate formaldehyde and low-molecular-weight amide degradation products; extraction ventilation should be maintained.
