| HS Code | 414366 |
| Material | Polyamide 12 (PA12) |
| Color | Black |
| Density | 1.01 g/cm³ |
| Melting Point | 178 °C |
| Tensile Strength At Yield | 40 MPa |
| Elongation At Break | 250% |
| Flexural Modulus | 1100 MPa |
| Notched Izod Impact At 23 C | 80 kJ/m² |
| Shore D Hardness | 70 |
| Water Absorption 24h | 0.3% |
| Vicat Softening Point | 170 °C |
| Heat Deflection Temperature At 0 45 Mpa | 140 °C |
As an accredited Arkema Rilsamid AESN BLACK P201 TL PA12-I factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Arkema Rilsamid AESN BLACK P201 TL PA12-I is supplied in 25 kg moisture-proof, sealed polyethylene-lined bags. |
| Container Loading (20′ FCL) | 20′ FCL loading: Arkema Rilsamid AESN BLACK P201 TL PA12-I, packed in 25kg bags on pallets, approximately 20 metric tons, securely stowed for transit. |
| Shipping | Ship as non-hazardous PA12 resin in sealed, moisture-proof packaging. Keep dry and avoid prolonged exposure to heat or direct sunlight to prevent degradation. Standard truck or container transport is suitable. Ensure cargo is secured and labeled per manufacturer guidelines; no special temperature control required for this thermoplastic. |
| Storage | Store Rilsamid AESN BLACK P201 TL PA12-I in its original, unopened packaging in a cool, dry, well-ventilated area. Protect from moisture, direct sunlight, and excessive heat to prevent degradation. Keep containers tightly sealed when not in use. Follow manufacturer’s recommendations for shelf life and handling. |
| Shelf Life | Shelf life is 2 years if stored unopened, in original packaging, in a cool, dry place away from moisture. |
Rilsamid AESN BLACK P201 TL is supplied as a black, plasticized PA12-I compound for extrusion and injection moulding where low-temperature impact, dimensional stability, and resistance to aliphatic hydrocarbons are governing design parameters. The long-chain amide structure of PA12 gives lower equilibrium moisture uptake than PA6 and PA66, but melt processing still requires residual moisture below 0.10% by weight to prevent hydrolysis-generated surface defects. Typical melting range is 170–178 °C by ISO 11357-3:2018, and density is in the range 1.01–1.04 g/cm³ by ISO 1183-1:2019. Grade-specific melt viscosity, flexural modulus, and additive loading are not reproduced here; the processing limits below derive from published plasticized PA12-I extrusion behaviour and should be validated against Arkema’s current product datasheet.
In evaporative fuel-line co-extrusion, this grade is specified as the outer protective layer where underbody stone impact, salt spray, and exposure to splash fuel require a semi-flexible jacket that does not shatter at -40 °C. The governing specification is SAE J2260 for ultra-low permeation multilayer fuel tubing, with assemblers requiring permeation values below the applicable CARB LEV III and Euro 6e evaporative limits. In a five-layer configuration, the PA12-I jacket typically represents 18–25% of total wall thickness, tie layers between 5 µm and 8 µm, an EVOH barrier layer 3–5% of total wall thickness, and an inner conductive PA6 layer 10–15% of total wall thickness. Regrind from edge trim is limited to 15% by weight of the PA12 layer due to cold-impact retention. Extrusion is conducted on a 5-layer spiral mandrel die with individual barrel zones set from 190 °C to 240 °C, melt temperature measured at the die between 225 °C and 250 °C, and vacuum calibration tank water held at 15–25 °C. Post-extrusion wall eccentricity is controlled to below 0.05 mm on an 8 mm outside-diameter tube. On five-layer lines, a die temperature difference above 10 °C between the EVOH and PA12 layers has been observed to generate interfacial ripple and local EVOH thinning below 2 µm, which increases permeation. Terminal products include SAE J2260 fuel line assemblies, vapour return lines, and quick-connect couplers for passenger vehicles and motorcycles.
Coiled air brake tubing extruded from this compound is produced as a monolayer because the material combines sufficient burst strength with low-temperature flexibility and resistance to road de-icing salts. The relevant standard is SAE J844, supplemented by ISO 7628-1:2010 for dimensional and material requirements; acceptance testing includes room-temperature burst pressure, burst after 72 h at 100 °C, zinc chloride resistance, methanol resistance, and cold impact at -40 °C. The formulation uses 100 parts of Rilsamid AESN BLACK P201 TL by weight; clean in-house regrind from the same lot is limited to 20 parts per 100 parts virgin because higher regrind ratios reduce elongation at break and move the ductile-to-brittle transition above -40 °C. No additional plasticizer is added at the converter stage. Processing is carried out on a single-screw extruder with L/D 24:1–30:1, a compression ratio of 2.5:1–3.0:1, and a barrel profile from 200 °C to 235 °C. Vacuum calibration is maintained at -0.25 bar to -0.40 bar, and the tube is annealed in forced air at 110 °C for 2 h to stabilize axial shrinkage. On production lines, melt pressure fluctuation greater than ±5 bar at the breaker plate correlates with wall-thickness variation above 0.08 mm on 12 mm outside-diameter tube and increases scrap rate. Die temperatures above 250 °C for residence times longer than 10 minutes produce plasticizer exudation as die-lip deposits, which then transfer to the tube surface as irregular gloss bands. Terminal products include 6 mm, 8 mm, 10 mm, 12 mm, and 16 mm outside-diameter coiled or straight air brake tubes for heavy trucks, trailers, and buses.
Automated assembly cells and robotic end-effectors use 4–12 mm outside-diameter pneumatic control tubing whose dimensional stability under 0.6–1.0 MPa working pressure is specified by ISO 14743:2004, with national requirements aligned to DIN 73378 for polyamide tubes in motor vehicles and industrial pneumatic systems. The compound is processed as 100% virgin monolayer; regrind is not recommended for tubing below 6 mm outside diameter because kink radius and burst retention are more sensitive to contamination particles, but where converters use regrind it is capped at 10% by weight and sourced exclusively from clean post-industrial tube. No additional carbon black masterbatch, UV stabilizer, or external plasticizer is required because the grade is already formulated with black pigmentation and heat stabilisation. Extrusion uses a gear pump between the screw and die to reduce surging; line speed for 4 mm outside-diameter tube can reach 60–90 m/min when a two-stage vacuum sizing tank and laser diameter gauge maintaining ±0.03 mm tolerance are used. Compressed air quality should meet ISO 8573-1:2010 class 1.4.1 or better for particulate and moisture, because oil mist above 1 mg/m³ can deposit on the die and cause surface haze. Terminal products include 4 mm, 6 mm, 8 mm, 10 mm, and 12 mm outside-diameter tubes with push-in fitting compatibility for pneumatic valve terminals and robot dress packages.
Immersion of PA12-I in 50:50 ethylene glycol/water at 85 °C reveals a hydrolysis boundary that must be respected when designing battery coolant circuits, because glycol-based coolants with alkaline reserve above pH 9 accelerate amide bond cleavage and reduce tensile strength retention. The governing test method is ISO 175:2010 for liquid chemical immersion, supplemented by ISO 16750-4:2010 for damp heat cycling in road vehicle electrical systems and ISO 527-1:2019 for tensile strength before and after fluid ageing. Published data for this exact compound in long-term glycol exposure is limited, but converters commonly require tensile strength retention of at least 70% after 1,000 h at 85 °C; grade-specific validation is therefore mandatory. In monolayer coolant tubes of 10–16 mm outside diameter, the material is used at 100% by weight with wall thickness 1.0–1.5 mm; in two-layer corrugated designs, the PA12 inner liner thickness is 0.30–0.50 mm. Extrusion is conducted on a corrugated tube line with moving mould blocks, melt temperature between 225 °C and 245 °C, and a post-extrusion heat-set step at 130 °C for 30 min to hold axial shrinkage below 1% at 120 °C. Insufficient drying above 0.10% moisture has been observed in field trials to produce surface micro-pits after 500 h coolant exposure. Terminal products include battery pack coolant distribution lines, power electronics cooling loops, and underfloor coolant conduits for electric light commercial vehicles.
As the inner liner in thermoplastic hydraulic hose, this grade is extruded before aramid or steel-wire braiding operations, where liner ovality and surface smoothness determine braid coverage and impulse fatigue resistance. The governing standards are SAE J517 for hydraulic hose performance and SAE 100R7/100R8 for thermoplastic medium- and high-pressure constructions, with ISO 3949:2020 and ISO 1402:2020 providing specification and hydrostatic burst procedures. The liner is processed at 100% virgin Rilsamid AESN BLACK P201 TL; no regrind is allowed in the liner layer because contamination particles concentrate at the braid interface and initiate pinhole leaks under impulse loading. Typical liner wall thickness ranges from 0.8 mm for SAE 100R7 medium-pressure hose to 1.5 mm for SAE 100R8 high-pressure hose. The extrusion process uses a mandrel-supported crosshead die to maintain concentricity, followed by cooling to below 60 °C before two-over-two braiding or four-spindle wire braiding; cover extrusion with a separate polyamide or polyurethane compound occurs after braiding. On production lines, liner ovality above 5% after mandrel release has been observed to reduce braid coverage and produce local bulging during 1,000,000-cycle impulse testing at 100 °C. Terminal products include SAE 100R7/100R8 hydraulic hose assemblies for construction, agricultural, and material-handling equipment.
Flexible control cable sheathing made from this compound is limited by elongation retention after thermal ageing and low-temperature mandrel bend performance, not by short-term tensile strength. The governing test methods are IEC 60811-501:2012 for mechanical properties of sheathing compounds and IEC 60811-504:2012 for low-temperature bending; where the cable is used in industrial automation, additional oil resistance is verified by ISO 175:2010 immersion in IRM 902 oil at 70 °C for 72 h. The sheathing formulation uses 100 parts of this grade by weight for virgin production; post-industrial regrind is limited to 10 parts per 100 parts because higher regrind levels reduce elongation at break below 150% after 7 days at 100 °C and increase the risk of jacket cracking in cold-bend tests at -40 °C. Pressure extrusion with a tube-on or semi-tube-on die is used, with melt temperature held between 220 °C and 245 °C; water trough temperature is controlled at 15–25 °C to prevent rapid quenching stresses. A 200-mesh screen pack is recommended upstream of the die to disperse carbon black and remove micro-gels, because melt temperature excursions above 250 °C have been observed in production runs to produce carbon black agglomerates and rough jacket surfaces. Terminal products include 0.4–0.8 mm thick sheaths for industrial control cables, robotic dress packs, sensor cables, and low-temperature flexible cable assemblies where halogen-free flame retardance is not the primary electrical specification.
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Arkema Rilsamid AESN BLACK P201 TL PA12-I is an impact-modified, heat-stabilised polyamide 12 injection-moulding grade. The ISO 1043-1 designation PA12-I identifies an impact-modified PA12 base; the black pigmentation is incorporated in the pellet. The suffix TL is associated with a heat-stabilised formulation in the Arkema polyamide 12 portfolio. Where grade-specific lot data are not publicly disclosed, the following characterisation draws on ISO 1874-1 family data for PA12-I and on established injection-moulding records for impact-modified polyamide 12.
Under ISO 1183-1, unreinforced PA12 homopolymer density falls in the range 1.01 g/cm³ to 1.04 g/cm³, approximately 10% lower than the 1.12 g/cm³ to 1.15 g/cm³ range for PA6 and PA66. Water uptake at saturation in water at 23 °C measured by ISO 62 is typically 1.5% to 2.0%, compared with 9.5% to 10.0% for PA6 and 8.5% to 9.0% for PA66. The lower amide-group density of PA12 is the controlling structural variable: fewer hydrogen-bonding sites per unit chain length reduce water absorption and the associated dimensional change in humid service.
Moisture ingress is diffusion-controlled. In a thin-walled injection-moulded part of 2 mm wall thickness, saturation following a step-change from dry-as-moulded to 50% relative humidity at 23 °C may require several hundred hours; the precise half-time depends on thickness, crystallinity, and the local carbon-black distribution. Dimensional drift follows the absorbed-water concentration rather than the instantaneous ambient humidity. Consequently, PA12 components in automotive fluid-contact areas are specified against the saturated moisture condition rather than the dry condition when close-tolerance fits are required.
Pre-drying in a dehumidified-air hopper dryer at 80 °C for 4 h to 8 h is standard. Residual moisture above 0.10% can generate splay, reduce melt strength, and initiate hydrolytic chain scission at injection-moulding melt temperatures. On a general-purpose reciprocating screw with 20:1 L/D and compression ratio 2.2:1 to 2.8:1, melt temperatures are typically held between 220 °C and 250 °C. Mould temperatures from 30 °C to 70 °C are used; the upper portion of the mould-temperature range increases crystallinity and improves surface definition but extends cycle time. Injection pressures of 50 MPa to 100 MPa are common, with clamp force calculated from the projected area and not from melt pressure alone.
Residence time in the barrel should be kept below 5 min at melt temperatures above 240 °C. If the shot weight is less than 25% of the barrel capacity, thermal history accumulates more rapidly; a smaller machine or a reduced-temperature profile should be used. The screw should be retracted after cycle to minimise stagnant melt in front of the nozzle. These constraints are production-line observations for impact-modified PA12, not unique to a single supplier.
The table lists family-level published values for unreinforced dry formulations, not grade-specific datasheet limits for a single production lot. The PA12-I column represents impact-modified PA12; PA6 and PA66 columns represent general-purpose dry-as-moulded technical grades.
| Property | Test method | PA12-I family | PA6 dry | PA66 dry |
|---|---|---|---|---|
| Density | ISO 1183-1 | 1.01–1.04 g/cm³ | 1.12–1.14 g/cm³ | 1.13–1.15 g/cm³ |
| Water absorption, saturation, 23 °C | ISO 62 | 1.5–2.0% | 9.5–10.0% | 8.5–9.0% |
| Tensile modulus | ISO 527-1/-2 | 400–1200 MPa | 2800–3200 MPa | 3000–3300 MPa |
| Notched Charpy impact, -30 °C | ISO 179-1/1eA | >10 kJ/m² | 4–8 kJ/m² | 5–10 kJ/m² |
| Melting peak | ISO 11357-3 | 174–180 °C | 220–225 °C | 255–265 °C |
| Vicat softening temperature, B50 | ISO 306 | 140–160 °C | 190–210 °C | 220–240 °C |
In comparison with PA6 and PA66, the PA12-I family sacrifices tensile modulus and high-temperature strength in exchange for lower density, lower moisture uptake, and improved low-temperature impact. The stiffness gap is intrinsic to the lower amide concentration: a dry PA6 part may show a tensile modulus roughly three times that of an impact-modified PA12 part. Where a housing or clip is stiffness-limited, PA6 or PA66 is usually selected unless dimensional stability or cold-temperature toughness governs.
Compared with PA11, the PA12-I family has a lower melting peak and similar low-water-uptake behaviour. PA11 offers a renewable carbon claim in many commercial grades; PA12 may be petrochemical or produced via alternative monomer routes depending on the supplier’s product line. Both are preferred over PA6 and PA66 for fuel-contact connectors and cable ties where moisture-induced embrittlement and dimensional drift are unacceptable.
Impact-modified PA12 retains ductile behaviour at temperatures where unreinforced PA6 and PA66 can become brittle in the dry state. The glass transition of PA12 is near 45 °C, below the 60 °C to 70 °C range for dry PA6 and PA66; this shifts the ductile-to-brittle transition downward. Notched Charpy impact data at -30 °C under ISO 179-1/1eA typically exceed 10 kJ/m² for impact-modified PA12, whereas dry general-purpose PA6 and PA66 often fall below 8 kJ/m². The practical consequence is that spring clips, cable ties, and quick-connect fittings can be snap-assembled in unheated assembly areas without pre-conditioning.
Chemical resistance data under ISO 175 and ASTM D543 immersion testing show PA12 has high retention of tensile properties in aliphatic hydrocarbons, diesel, lubricating oils, and zinc chloride salt solutions. PA6 and PA66 are more susceptible to zinc chloride stress cracking in road-salt environments; PA12 does not show the same failure mode at the same exposure severity. Strong acids, phenols, cresols, and strongly oxidising media remain outside the operational boundary.
For continuous thermal ageing, the heat-stabilised TL suffix indicates suitability for extended exposure at elevated ambient temperatures. Heat-stabilised PA12 is commonly screened by retention of tensile elongation after 1000 h at 150 °C in air-circulated ovens using ISO 527-1/-2 after ageing. Actual continuous-use temperature must be application-specific, because load, wall thickness, and oxygen access alter the failure point. Published data for this specific configuration is limited when an exact continuous-use rating under a defined load and thickness is required.
Application usage reported for impact-modified PA12 injection grades includes automotive fuel-vapour quick connectors, cable ties, clips, electrical housings, and pneumatic push-in fittings. In each case, the material is selected only after verifying the service environment against the grade-specific chemical resistance and thermal ageing data. Continuous fuel immersion, dry-heat ageing, and pressure cycling tests are performed according to the OEM specification, not generic ISO property data alone.
Tooling and runner design influence whether the impact-modified PA12 melt delivers its published toughness to the part. Cold-runner systems with large sprue diameters reduce shear heating, but increase cycle time and material hold-up; hot-runner systems require thermal uniformity across nozzles because local overheating above 260 °C can degrade heat-stabiliser packages and shift surface colour. Valve-gate hot runners reduce stringing and allow sequential filling of long cable-tie cavities. The mould surface temperature should be controlled by pressurised water, not oil, because the low melt temperature of PA12 does not justify high-temperature oil units; 50 °C water is normally sufficient for gloss and dimensional reproducibility.
Mould shrinkage for PA12 injection grades is measured by ISO 294-4; impact-modified PA12 typically exhibits isotropic shrinkage in the range 0.7% to 1.5% depending on part thickness, mould temperature, and gate geometry. Thick sections above 3 mm cool more slowly and allow higher crystallinity, increasing shrinkage and reducing impact. Gating should be located to avoid weld lines in snap-fit flexural zones; weld-line strength in impact-modified PA12 may fall below the base-polymer impact value by 30% to 50% depending on melt temperature and mould venting. These figures are production guidelines, not design allowables.
Spiral-flow data generated on a 2 mm cavity at 230 °C melt and 50 °C mould are used as a lot acceptance comparison; published data for this grade may be obtained from Arkema’s technical datasheet. General impact-modified PA12 injection grades fill thin walls down to 0.5 mm only when the flow length is below the spiral-flow limit and when gate freeze time is long enough. For wall sections below 0.5 mm, high injection speed and gas venting are critical because entrapped air raises local temperature and oxidises the melt surface.
The linear coefficient of thermal expansion for PA12 is approximately 110 × 10-6 K-1 to 130 × 10-6 K-1 by ISO 11359-2 for the solid state; this is lower than many unfilled polyolefins but higher than reinforced polyamides. In assemblies with metal inserts, the mismatch in expansion creates residual stress after moulding; stress-relief annealing is not always effective in impact-modified grades because the soft phase relaxes differently from the polyamide matrix.
Lot-to-lot MVR variation is controlled to a narrow band in technical PA12 grades; users report that ±10% in MVR at the same melt temperature is often acceptable for unfilled grades but can shift fill time and cushion by several percent in thin-wall tools. For tight-tolerance components, the datasheet MVR range should be used as an incoming quality check with ISO 1133-1 at the supplier-specified condition.
Mould-fill simulation for PA12-I should use measured melt viscosity from capillary rheometry at shear rates 100 s-1 to 10,000 s-1; generic PA6 flow data are not interchangeable because the viscosity-shear-rate curve of impact-modified polyamide 12 has a different temperature sensitivity and zero-shear plateau. Cross-WLF model coefficients supplied by the polymer manufacturer or derived from parallel-plate rheometry under ISO 6721-10 are preferred for gate freeze and pressure-drop calculations.
The lower amide concentration in PA12 increases oxygen permeability relative to PA6 and PA66. In fuel-vapour systems, PA12 is often used as a structural layer rather than the barrier layer; the barrier function is supplied by a fluoropolymer, EVOH, or metal substrate. Selecting PA12-I for a single-layer fuel connector requires verifying the permeation specification under the relevant hydrocarbon test method.
In the Arkema polyamide portfolio, Rilsamid AESN BLACK P201 TL PA12-I differs from Rilsan PA11 grades in monomer origin and melting behaviour; from standard Rilsamid PA12 grades it differs by the impact-modified, heat-stabilised black formulation. The PA12-I marker does not imply reinforcement; glass-fibre or carbon-fibre reinforced PA12 would carry a different ISO 1043-1 designation and exhibit higher modulus and lower impact.
Carbon-black pigmentation provides UV stabilisation in the near-surface layer, but the stabiliser package must be evaluated for thin-wall sections below 0.5 mm because surface oxidation can consume stabiliser faster than the bulk. Outdoor weatherability tests under ISO 4892-2 or ASTM G154 are used for property retention verification; the black grade is expected to show lower gloss change than unpigmented grades, but mechanical property retention depends on total UV dose and moisture cycling.
