| HS Code | 228899 |
| Density | 1.04 g/cm³ |
| Melt Volume Flow Rate | 50 cm³/10 min at 235°C, 2.16 kg |
| Melting Point | 174 °C |
| Vicat Softening Temperature | 145 °C |
| Glass Transition Temperature | -45 °C |
| Tensile Modulus | 600 MPa |
| Tensile Stress At Yield | 25 MPa |
| Elongation At Break | >300% |
| Flexural Modulus | 650 MPa |
| Charpy Notched Impact At 23 C | No break |
| Charpy Notched Impact At 40 C | 70 kJ/m² |
| Shore D Hardness | 58 |
| Water Absorption At Saturation | 1.2% |
As an accredited Arkema Rilsamid AMN BLACK P20 TLD PA12 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 25 kg sealed foil bags, palletized and wrapped, containing black Arkema Rilsamid AMN P20 TLD PA12 granules. |
| Container Loading (20′ FCL) | 20′ FCL: 20,000 kg bagged Arkema Rilsamid AMN BLACK P20 TLD PA12 in 25 kg bags, 800 bags per container. |
| Shipping | Arkema Rilsamid AMN BLACK P20 TLD PA12 ships as polyamide 12 granules in sealed moisture-proof bags or drums. It is not classified as dangerous goods under standard transport regulations. Keep dry, away from excessive heat and ignition sources. Avoid creating dust; use proper handling and ventilation during unloading. |
| Storage | Store Arkema Rilsamid AMN BLACK P20 TLD PA12 in its original, unopened packaging in a cool, dry, well-ventilated area. Avoid direct sunlight, heat sources, and moisture. Keep containers tightly sealed when not in use to prevent humidity absorption, which can affect processing. Ideal temperature is below 30°C. |
| Shelf Life | Shelf life is typically 2 years when stored cool and dry in unopened original packaging. |
Rilsamid AMN BLACK P20 TLD is converted as a single-layer 8 mm outside diameter × 1 mm wall air brake tube on a 38 mm grooved-feed single-screw extruder with an L/D ratio of 30:1 and a barrier screw compression ratio of 2.8:1. Pellets are dried in a desiccant hopper dryer at 80°C for 4–6 h with a dew point of -40°C to keep residual moisture below 0.10% by ISO 15512. Barrel temperatures are 210°C in the feed zone, 225°C in the compression zone and 235°C in the metering zone; head and die are held at 240°C ±3°C. Vacuum calibration at -0.7 bar and water temperature 25°C sets roundness; ovality of 0.05 mm is routinely obtained. Clean post-industrial regrind at 20% by weight is added only after drying to 0.10% moisture; under SAE J844 cold impact at -40°C, fracture is not observed. Burst testing of 8 mm × 1 mm tube at 23°C typically ends above 4 MPa. Carbon black functions as a nucleating agent, reduces post-extrusion shrinkage and permits line speeds of 40–60 m/min without surface melt fracture. Batch-to-batch flow variance is controlled by melt pressure at the die; excursions beyond ±10 bar require die gap adjustment of 0.02 mm. In plants where ambient relative humidity exceeds 60%, drying time is extended to the upper end of the 4–6 h range.
| Process variable | Set point | Control band | Method/instrument |
|---|---|---|---|
| Desiccant dryer air dew point | -40°C | -30°C maximum | Dew point sensor |
| Drying residence time at 80°C | 4–6 h | ±0.5 h | Hopper dryer timer |
| Barrel zone 1 | 210°C | ±5°C | Immersion thermocouple |
| Barrel zone 3 | 235°C | ±3°C | Immersion thermocouple |
| Head/die | 240°C | ±3°C | Flange thermocouple |
| Vacuum calibration pressure | -0.7 bar | -0.5 to -0.8 bar | Capacitance gauge |
| Post-die cooling water | 25°C | ±5°C | PT100 sensor |
Diesel and hybrid fuel tank venting circuits use 6 mm outside diameter × 1 mm wall tube extruded from the grade at melt temperature 235°C through a 25 mm L/D 24:1 barrier screw. The PA12 backbone absorbs less fuel than PA6 or PA66 in the same wall section; in evaporative-emission applications the wall is increased to 1.25 mm and permeation is measured by CARB TP-901 or vehicle-level SHED procedures. Ethanol-blended gasoline above 10 vol% ethanol is not recommended for continuous wet service above 60°C because plasticizer extraction raises surface tack and increases permeation variability. Dry vapour service can tolerate intermittent excursions to 110°C. Because the grade is compounded black, no carbon black masterbatch is added at the extruder; this eliminates dispersion-related pressure oscillations of 5–10 bar common with concentrates. Post-industrial regrind at 20% by weight is acceptable when dried to 0.10% moisture. Terminal product concentricity is held at 0.05 mm; eccentricity beyond this value creates a thinner permeation path and accelerates burst decay after 1,000 h at 80°C in hot air.
Pneumatic control lines for rail door actuation are extruded as 4 mm outside diameter × 0.75 mm wall tube at 80 m/min through a water trough held at 30°C. Shore D hardness of 63–66 per ISO 868 permits bending around a 5× outside diameter mandrel at -25°C without kinking. The line is rated for 8 bar working pressure; calculated hoop stress at that pressure is 21 MPa, giving a yield-factor safety margin when the grade is conditioned to equilibrium moisture at 50% RH. After 1,000 h dry heat aging at 100°C, tensile elongation retention is above 70% to ISO 527-2. Humid aging lowers tensile modulus by 15–20% and improves low-temperature notched impact, but this must be accounted for in push-to-connect fitting retention at 60°C. Continuous contact with zinc chloride road de-icing brine above 60°C is not recommended because stress cracking can initiate at metal-to-tube interfaces.
On a 45 mm L/D 25:1 barrier screw extruder, the grade is applied at 0.8–1.2 mm wall over twisted copper conductor bundles at melt temperature 230–240°C. Compared with polyurethane, the PA12 compound lowers low-temperature flexural modulus and passes EN 50264-1 and ISO 6722-1 low-temperature flexibility at -40°C when wall thickness is uniform. Strain at break exceeds 300% under ISO 527-2, which allows jacket stripping without fracture. In fire performance, the unfilled black PA12 grade is rated HB under UL 94; it is not a V-0 or EN 45545-2 HL3 solution unless an additional flame-retardant sheathing layer is used. After 1,000 h at 90°C in air, tensile elongation retention remains above 70%, but plasticizer migration forms a low-gloss film on printing rollers; corona or flame treatment is required before sheath marking. Amine-containing flame retardant masterbatches are avoided because they create gel particles above 240°C. The grade is not used in continuous-contact ester-based hydraulic fluids above 70°C because ester plasticization can swell the sheath and loosen connector strain reliefs.
Spiral sleeves are extruded as slit tubes with 1.2 mm wall and 32 mm outside diameter using a 45° offset die head and post-die cooling water at 10°C to set the geometry. Dimensional recovery after 24 h at 23°C is within 2% of the die gap. The black pigment provides UV weathering resistance to ISO 4892-2 for 1,000 h without significant chalking; surface resistivity remains above 1012 ohm, so the sleeve is not used where electrostatic dissipation is required. For sliding abrasion against steel braid, 1.2 mm wall is specified because thinner cross-sections fail after 50,000 cycles in a reciprocating abrasion test. The material is compliant with REACH and RoHS but is not food-contact approved. Regrind loading above 25% is not used because elongation at break falls below 300% from chain scission after multiple heat histories.
Industrial valve automation pilot line tube of 6 mm outside diameter × 1 mm wall is rated for 8 bar at 23°C. At 10 bar, calculated hoop stress reaches 30 MPa, near the yield point of plasticized PA12; the accepted service pressure is therefore limited to 8 bar continuous. Bend radius is held at 5× outside diameter; tighter geometry causes permanent kinking under 10 bar cycle testing. The working life is bounded by thermo-oxidative aging of the plasticizer, not initial burst; after 2,000 h at 100°C, burst pressure can decline by approximately 20% with surface discoloration. The product is installed downstream of a pressure regulator and an FRL unit because compressor oil can extract plasticizer and reduce cold-flex capability. Batch acceptance is typically by ISO 7628 burst and compression set measurement. Published data for this specific industrial automation configuration is limited beyond automotive and rail specifications; site-specific validation is required for 24/7 operation at maximum rated temperature.
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Arkema Rilsamid AMN BLACK P20 TLD is a black-pigmented, plasticised polyamide 12 (PA12) compound supplied for injection moulding and flexible tube/profile extrusion. The base polymer is poly(ω-dodecanamide) with a semi-crystalline morphology; the P20 designation identifies a plasticiser modification, while TLD indicates the stabiliser and lubricant additive package. In dry-as-moulded condition, density is approximately 1.04 g/cm³ measured per ISO 1183-1. Differential scanning calorimetry per ISO 11357-1/-3 gives a melting temperature near 171°C. Melt volume-flow rate at 235°C and 1 kg is approximately 10 cm³/10 min per ISO 1133-1. The lower amide-group concentration of PA12 compared with PA6 and PA66 limits saturated moisture uptake and reduces property drift in humid service.
Moisture control is the primary processing boundary. If pellet moisture exceeds 0.1 wt%, hydrolysis at melt temperature reduces molecular weight and produces surface splay, die drool, and notched Charpy impact loss. Desiccant drying at 80°C for 4–8 h to a dew point ≤ -40°C is required before extrusion or injection moulding. In plants where ambient relative humidity exceeds 60%, dried pellets should be transferred under dry air or nitrogen; open transfer times longer than 30 min can allow surface moisture regain of 0.05–0.1 wt%. Feed throats should be maintained at 60–80°C to avoid condensation on cold metal surfaces.
Plasticiser addition lowers long-chain mechanical coupling in the amorphous phase. Under ISO 527-1/-2 tensile loading at 23°C, representative dry-as-moulded tensile modulus for the P20 grade is approximately 1000 MPa, whereas unplasticised PA12 injection-moulding grades typically exhibit 1400–1600 MPa. Yield stress is near 36 MPa, and nominal strain at break remains greater than 50%. Charpy notched impact strength at 23°C per ISO 179-1/1eA is roughly 10 kJ/m²; unmodified PA12 often shows 5–7 kJ/m². Shore D hardness measured per ISO 868 is approximately 68, compared with 75–77 for unplasticised PA12. Conditioning at 23°C and 50% RH per ISO 1110 typically lowers tensile modulus by 10–20% relative to dry-as-moulded values.
| Property | Test standard | Representative value | Unit |
|---|---|---|---|
| Density | ISO 1183-1 | 1.04 | g/cm³ |
| Melting temperature | ISO 11357-1/-3 | 171 | °C |
| Melt volume-flow rate, 235°C/1 kg | ISO 1133-1 | 10 | cm³/10 min |
| Tensile modulus, 23°C dry | ISO 527-1/-2 | 1000 | MPa |
| Yield stress, 23°C dry | ISO 527-1/-2 | 36 | MPa |
| Nominal strain at break | ISO 527-1/-2 | >50 | % |
| Charpy notched impact, 23°C | ISO 179-1/1eA | 10 | kJ/m² |
| Shore D hardness | ISO 868 | 68 | — |
| Vicat softening temperature, B50 | ISO 306 | 150 | °C |
| Water absorption, saturation | ISO 62 | 1.4 | % |
The lower amide-group density of PA12 relative to short-chain aliphatic polyamides is the principal difference in humid-service performance. Under ISO 62 immersion to saturation at 23°C, PA12 grades absorb approximately 1.4–1.5 wt% water, while PA66 typically reaches 7–8.5 wt% and PA6 9–10 wt%. This lower equilibrium moisture uptake stabilises dimensions, electrical properties, and tensile modulus under cyclic humidity. Compared with PA11, PA12 has slightly lower amide density and a lower melting temperature near 171°C, which can reduce energy input during extrusion. The black pigment package in the P20 TLD grade provides UV screening, but long-term weatherability should be confirmed by accelerated weathering per ISO 4892-2 rather than inferred from pigment presence alone.
Plasticised PA12 is thermally less tolerant than unplasticised PA12 because added plasticiser can volatilise, migrate, or form oxidative by-products at elevated melt temperatures. The recommended melt temperature window for injection moulding is 230–250°C; for tubing and profile extrusion, melt temperature at the die should be 220–240°C. Barrel zones are typically set from 210°C at the feed zone to 240°C at the metering zone, with nozzle temperature not exceeding 250°C. A three-zone general-purpose screw with L/D ratio of 20–25 and compression ratio 2.5:1–3:1 is acceptable. Back pressure should be held at 0.5–1.5 MPa to avoid excessive shear heating. Injection pressure is commonly 80–120 MPa depending on flow length and wall thickness. For multi-cavity tools, clamp force should be calculated from projected area; at 100 MPa cavity pressure, 1 cm² of projected area requires approximately 10 kN clamp force.
Residence time at melt temperature should not exceed 10 min. Hot runner manifolds should be maintained below 240°C to reduce carbonised deposits and plasticiser loss. Start-up and shutdown purging with unplasticised PA12 or polyolefin is preferred. On production-scale injection machines, mould temperature should be maintained at 40–80°C; condensation on cold tool surfaces occurs when mould temperature falls below the plant dew point and can generate surface blemishes and weak weld lines. Cooling time for a 2 mm wall section at 60°C mould temperature is typically 6–10 s. Screw speed during recovery is normally 60–120 min⁻¹; higher speeds can reduce cycle time but may increase shear heating above the melt limit.
For extrusion of flexible tubing, a single-screw extruder with L/D of 24–30, compression ratio 2.5:1–3:1, and a screened breaker plate is used. Melt temperature at the die is controlled at 220–240°C. In-line melt pressure before the die typically ranges from 10–25 MPa depending on wall thickness, die land length, and output rate. Excessive pressure rise at constant screw speed can indicate moisture, gel accumulation, or degraded material in the screw channel. Published capillary rheometry data for this specific black P20 TLD configuration is limited; processing development should therefore rely on in-line melt pressure transducers, melt temperature probes, and post-moulding viscosity retention tests rather than extrapolating from natural unplasticised formulations.
Typical application environments include truck air brake tubing, hydraulic hose jackets, automotive fuel-vapour vent lines, and industrial pneumatic conduits. For air brake tubing, PA12 compounds are evaluated against SAE J844 performance requirements, including tensile strength after ageing, elongation, burst pressure at 23°C and -40°C, moisture absorption, and zinc chloride stress-crack resistance. In cable jacketing, the lower flexural modulus of the P20 grade reduces bending force at low temperature, while the black pigment package contributes to UV resistance. Long-term thermal exposure should be validated by ageing per ISO 2578; sustained service above 120°C in air is generally not recommended for plasticised PA12 because oxidative embrittlement can occur.
Chemical compatibility is a routine selection criterion for PA12 in automotive and industrial fluid systems. Immersion in diesel, biodiesel, hydraulic fluids, and road salt solutions is evaluated by the finished component manufacturer. In zinc chloride stress-crack testing, PA12 grades generally show longer time-to-failure than PA6 or PA66 because lower amide concentration reduces zinc coordination and stress-cracking sensitivity. Test method ISO 22088-3 or internal automotive procedures may be used. Material selection should be confirmed by immersion testing on finished parts under end-use stress rather than by short-term coupon testing alone.
| Regulation / standard | Relevant condition | Assessment basis |
|---|---|---|
| RoHS Directive 2011/65/EU including Delegated Directive (EU) 2015/863 | Threshold limits for Pb, Hg, Cd, Cr(VI), PBB, PBDE, DEHP, BBP, DBP, DIBP | XRF and GC-MS screening per IEC 62321 series |
| REACH (EC) No 1907/2006, Article 33 | Substances of Very High Concern greater than 0.1 wt% in articles | Supplier declaration and SDS review |
| SAE J844 | Air brake tubing performance and environmental cycling | Lot validation on finished tube |
| ISO 527-1/-2 | Tensile modulus, yield stress, tensile strain at break | Dry-as-moulded type 1A specimens |
| ISO 179-1/1eA | Notched Charpy impact | Type 1eA specimens at 23°C and -30°C |
Rilsamid AMN BLACK P20 TLD should not be combined with amine-based concentrate masterbatches that can alter acid end-group balance and shift melt viscosity. Regrind use is possible at 20–30% by weight if the regrind is dry, free of oil, and not thermally degraded; higher regrind fractions lower notched impact strength and increase lot-to-lot viscosity variation. Mould shrinkage is generally in the range of 0.8–1.2% depending on wall thickness, gate geometry, and mould temperature, and should be verified by trial shots before cutting production tooling. The grade is not a thermoplastic elastomer; Shore D hardness near 68 limits use where elastomeric recovery below 30% compression set is required. In flexible tubing, the material provides lower bending force than unplasticised PA12 while retaining fuel and oil resistance and dimensional stability under moisture exposure.
