| HS Code | 354963 |
| Material | Polyamide 12 (PA12) |
| Reinforcement | 50% Glass Fiber |
| Color | Black |
| Density | 1.43 g/cm³ |
| Melting Point | 178 °C |
| Tensile Modulus | 12600 MPa |
| Tensile Stress At Break | 130 MPa |
| Elongation At Break | 3% |
| Flexural Modulus | 11200 MPa |
| Flexural Strength | 160 MPa |
| Charpy Impact Strength Notched | 14 kJ/m² |
| Heat Deflection Temperature 1 8 Mpa | 170 °C |
| Vicat Softening Temperature B50 | 175 °C |
| Water Absorption 24h 23 C | 0.45% |
As an accredited Arkema Rilsamid AZM 50 BLACK T6LD PA12-GF50 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 25 kg moisture-proof bags, sealed to protect the PA12-GF50 pellets from moisture and contamination during transport. |
| Container Loading (20′ FCL) | 20′ FCL loading: palletized bags of Arkema Rilsamid AZM 50 BLACK T6LD PA12-GF50, secured and protected for safe transit. |
| Shipping | Arkema Rilsamid AZM 50 BLACK T6LD is a glass-fiber-reinforced PA12 thermoplastic supplied as black pellets. Ship in sealed, moisture-proof packaging to prevent humidity absorption. Store cool and dry. No special hazard classification for transport under normal conditions, but handle with standard industrial hygiene practices. |
| Storage | Store Rilsamid AZM 50 BLACK T6LD in its original, sealed packaging in a cool, dry, well-ventilated area. Protect from direct sunlight, moisture, and excessive heat sources. Keep away from open flames and strong oxidizers. Ideal temperature is below 30°C to prevent degradation. Use within manufacturer’s recommended shelf life, ensuring containers are kept closed when not in use. |
| Shelf Life | Store in original sealed packaging in cool, dry conditions; shelf life is two years from date of manufacture. |
Within low-pressure natural gas distribution networks operating at MOP values between 4 bar and 7 bar, injection-moulded transition fittings based on Arkema Rilsamid AZM 50 BLACK T6LD PA12-GF50 are produced where creep resistance under continuous hoop stress and dimensional stability in wet-soil installations determine service life. The material is processed as received because the 50 wt% short-glass loading is already compounded; pressure-bearing body cavities are fed 100 wt% virgin pellet, while sprues and runners are reintroduced at ≤10 wt% only into non-pressure-bearing reinforcing collars that have been revalidated under the same hydrostatic test sequence. Compliance is anchored to ISO 16486-3:2020 for polyamide 12 injection-moulded fittings and to the system-level requirements of ISO 16486-1:2020; batch release includes melt mass-flow-rate checks under ISO 1133-1:2022 and tensile modulus under ISO 527-2:2012. Downstream production uses desiccant drying at 80 °C for 4 h until residual moisture is <0.08 wt%, followed by injection moulding on hydraulic clamp machines of ≥1,500 kN with a low-compression screw of 20:1 L/D, melt temperature 250–270 °C, mould temperature 70–90 °C, and back pressure 0.3–0.6 MPa. Sequential valve gates are positioned to shift weld lines away from thread roots and sealing planes, and post-mould annealing at 100 °C for 2 h is applied where machined tolerance bands of ±0.03 mm are required. Terminal finished goods include PE-to-PA12 transition coupling bodies, saddle fusion outlets, and valve stem adapter housings. Published data for this specific reinforced configuration in long-term slow crack growth under gas condensate exposure is limited; each tool and fitting geometry therefore requires hydrostatic revalidation rather than extrapolation from unfilled PA12 pipe-grade behaviour.
In underhood quick-connect bodies for evaporative fuel vapor and crankcase ventilation lines, PA12-GF50 withstands sustained clamp loading at 90–120 °C without the moisture-induced dimensional shift observed in PA66-GF50 grades. The formulation ratio is fixed by the grade at 50 wt% glass fibre; no letdown or mineral dilution is used in thin-wall sections, and clean regrind from gated off-takes is held at ≤15 wt% because fibre length reduction at weld lines measurably lowers retention-tab pull-off force under SAE J2044 test conditions. Compliance for quick-connect geometry and fitting validation follows SAE J2044, while vapour line component validation is reviewed against SAE J2260; chemical exposure testing uses ISO 16750-5:2010 with fuels, engine oil, and windshield washer fluid. Moulding is performed on 80–120 mm plasticating units with a compression ratio of 2.0:1 and a melt temperature of 260–280 °C; the mould is held at 80–110 °C to promote fibre wetting and minimize exposed glass at snap-fit surfaces. Gates are located on the body sidewall rather than through the retention tabs; after ejection, parts are conditioned for 48 h at 23 °C and 50% RH before dimensional inspection. Terminal products include fuel vapor quick-connect female bodies, EVAP canister purge-valve bodies, and brake vacuum line connectors. Operational boundaries include high-pressure fuel lines and methanol blends above 5 vol%, which require additional fuel-resistance and weld-line fatigue validation because published data for this glass-loaded PA12 in those environments remains limited.
Compressed air brake systems in commercial vehicles expose valve bodies to cyclic pressure between 0 bar and 12 bar, compressor oil mist, and water condensate; these conditions favour the low equilibrium moisture uptake of PA12-GF50 over PA66-GF35 in multi-cavity components where spool bore roundness must remain within ±0.02 mm after 1,000 h of thermocycling. The 50 wt% glass reinforcement is as-formulated, and moving spool bores are filled with 100 wt% virgin compound because even 10 wt% regrind shifts fibre orientation at gate-to-bore weld lines and increases bore ovality under ISO 16750-4:2018 temperature cycling. Cover plates and non-moving brackets may incorporate ≤20 wt% clean regrind after dimensional and burst-pressure revalidation. Subsystem performance is reviewed against FMVSS 121 and ECE R13, while material-level environmental validation uses ISO 9227:2017 neutral salt spray and ISO 1183-1:2019 density checks to detect internal voids. Production involves desiccant drying at 80 °C to <0.10 wt% moisture, injection moulding with hydraulic side actions for internal galleries on ≥1,800 kN clamp force, melt temperature 255–275 °C, and mould temperature 80–100 °C; critical spool bores are CNC reamed after moulding to remove glass-rich skin and achieve 0.02 mm concentricity. Terminal finished goods include relay valve housings, parking brake valve blocks, trailer brake manifold bodies, and suspension leveling valve covers. Compatibility with phosphate-ester hydraulic fluids must be validated separately; the material is not recommended for continuous exposure to concentrated mineral acid condensate.
Recirculating chiller loops operating between −20 °C and +80 °C contain ethylene glycol/water mixtures that degrade PA66 components by plasticisation and hydrolytic embrittlement; pump volutes and seal housings moulded from Arkema Rilsamid AZM 50 BLACK T6LD PA12-GF50 are used in such circuits because the 50 wt% glass reinforcement maintains low creep under flange bolt preload. The processing ratio is 100 wt% neat pellet for pressure-containing walls; clean sprues and runners may be recompounded at ≤20 wt% into housings that are subsequently hydrostatically tested at 1.5× the working pressure. Compliance is reviewed against ISO 5199:2002 for rotodynamic pump design, chemical resistance is assessed by ISO 175:2010 immersion in the actual glycol concentration, and heat distortion is tracked under ISO 75-1/-2:2020 at 1.8 MPa. Production begins with drying at 80 °C to <0.08 wt% residual moisture, followed by injection moulding on clamp force of ≥2,000 kN, melt temperature 260–280 °C, mould temperature 70–110 °C, and balanced four-gate feeding to reduce ovality in the impeller chamber. Seal faces are face-milled after moulding to 0.05 mm flatness and Ra 0.8 µm surface finish before assembly. Terminal finished products include volute halves, mechanical seal housings, and suction covers for glycol recirculation pumps. The material is not recommended for potable water contact, strong acids, or ketone-containing process fluids without chemical compatibility testing.
Signal acquisition enclosures moulded from neat PA12-GF50 replace die-cast aluminium where mass reduction and dimensional stability across condensation cycles outweigh the requirement for EMI shielding. The material is run as received at 50 wt% glass; the black T6LD package already contains carbon black and heat stabiliser, and post-mould flame-retardant masterbatches are not added because they reduce tensile modulus and would invalidate the pre-compounded dielectric data. Regrind for enclosure bodies is limited to ≤10 wt% to maintain creep resistance under terminal screw torque. Electrical insulation is reviewed under IEC 60664-1:2020 for pollution degree 2, and comparative tracking index data are generated under IEC 60112:2019; the material is not a flame-rated compound and is not placed into UL 94 V-0 enclosure applications without a listed FR grade. Insert moulding of brass signal pins is performed with preheated inserts at 120 °C, melt temperature 250–270 °C, mould temperature 90–110 °C, and pin-receiving cores held to H7 tolerances to prevent sink marks. Terminal finished parts include sensor housings, solenoid bobbins, terminal rail supports, and measuring-cell enclosures. Limitation: continuous exposure to strong UV without opaque pigmentation or capstock may affect surface gloss, though the carbon black package provides baseline UV screening.
For low-inertia timing pulleys and spur gears in packaging and conveying lines, the 50 wt% glass loading of PA12-GF50 raises tensile modulus and lowers creep relative to unfilled acetal in dry-running applications, but tooth root strength becomes sensitive to regrind content because average glass fibre length decreases below 200 µm after repeated plasticating cycles. Batch feeding for gear cavities is 100 wt% virgin pellet; regrind from sprues is diverted to non-tooth structural hubs at ≤10 wt% where cyclic tooth bending is absent. Material properties are verified under ISO 527-2:2012 for tensile modulus and ISO 178:2019 for flexural properties; tooth geometry tolerances are evaluated against ISO 1328-1:2013 grade Q8 or Q9 depending on pitch. Moulding uses an electric screw machine with 18:1 L/D, melt temperature 250–270 °C, mould temperature 80–120 °C, and a single gate located at the hub to orient glass fibres radially along the tooth flank where possible; after ejection, pulleys are annealed at 110 °C for 4 h under nitrogen to stabilise post-shrinkage. Terminal finished products include timing belt pulleys, spur gears, cam wheels, and chain guide inserts. Boundary conditions include low-temperature impact duty below −20 °C, where Charpy notched data under ISO 179-1:2010 must be reviewed before substituting for metal gears.
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Arkema Rilsamid AZM 50 BLACK T6LD is classified under ISO 1043-1:2011 as PA12-GF50—a thermoplastic polyamide 12 matrix containing nominally 50% by mass glass fibre. The BLACK designation denotes carbon black pigmentation; the T6LD suffix is associated in trade literature with a heat-stabilised and internally lubricated injection-moulding system, although the exact additive package is proprietary and may vary by production plant. The material is supplied as black pellets and is processed by injection moulding into components requiring high stiffness, low moisture sensitivity, and resistance to hydrocarbon-based operating fluids. Batch acceptance for density is commonly reported from 1.44 g/cm³ to 1.47 g/cm³ under ISO 1183-1:2019. Dry-as-moulded tensile strength in this compound class is typically in the range 140 MPa to 160 MPa, with tensile modulus from 12.0 GPa to 14.5 GPa measured under ISO 527-2:2012; conditioned values at 23°C/50% RH are lower and must be obtained from the lot-specific certificate of analysis.
| Property | Method | Typical condition |
|---|---|---|
| Density | ISO 1183-1:2019 | 23°C |
| Tensile modulus, tensile strength | ISO 527-2:2012 | 23°C, dry-as-moulded and 50% RH |
| Flexural modulus, flexural strength | ISO 178:2019 | 23°C, 2 mm/min |
| Charpy notched impact | ISO 179-1:2023 | 23°C and -40°C |
| Heat deflection temperature | ISO 75-2:2013 | 1.80 MPa and 0.45 MPa |
| Moisture absorption | ISO 62:2008 | 23°C/50% RH |
| Chemical resistance screening | ISO 175:2010 | 23°C/24 h immersion |
At shear rates between 10² s⁻¹ and 10⁴ s⁻¹ in capillary rheometry, the melt exhibits pronounced shear thinning, but the suspension viscosity cannot be approximated from unfilled PA12 data because the glass fibres increase extensional resistance and reduce die swell. In injection moulding, a 50% glass-fibre compound of this type requires higher injection pressure and shorter flow paths than PA12-GF30. Fibre orientation creates a skin-core structure in the part, which raises flow-direction stiffness but reduces transverse ductility. Weld lines are the limiting defect class: when two melt fronts meet at a 260°C melt temperature and 80°C mould temperature, tensile strength retention at the weld line is typically 50% to 70% of the parent material under ISO 527-2:2012 coupon testing. Retention below 50% is observed when mould temperature falls below 60°C or when the flow front length exceeds 150 mm in a 2 mm wall. Gate locations must therefore place weld lines outside snap-fit beams, threaded bosses, and pressure-bearing regions.
The pellets are dried in a desiccant hopper dryer with a dew point of -30°C or lower at 80°C for 4 h to 8 h to reach a residual moisture content of 0.10% or less under ISO 15512:2019. Residual moisture above 0.10% accelerates hydrolysis of the PA12 backbone during melt residence, producing silver streaks on the part surface, part-weight variation, and reduced weld-line strength. Drying beyond 8 h at 80°C is generally tolerated by the heat-stabilised formulation, but only if the dryer airflow is unobstructed; channelling in full hoppers leaves wet pellet cores that are not detected by outlet dew-point sensors alone. On production lines operating at ambient relative humidity above 60%, dried pellets should be blanketed with dry air at the machine throat. The maximum allowable hold-up time in an open hopper is site-specific but commonly does not exceed 30 min before re-drying is required.
Under ISO 62:2008 at 23°C/50% RH, unfilled PA12 absorbs approximately 0.7% moisture, whereas unfilled PA66 absorbs approximately 2.5% by mass. The 50% glass-fibre fraction dilutes the hygroscopic matrix and lowers the absolute moisture uptake, but the relative advantage of PA12 over PA66 remains. Moisture uptake is not isotropic: thickness swelling and transverse shrinkage can differ by 0.1% to 0.3% from flow-direction movement depending on fibre orientation. In injection-moulded plaques under ISO 62:2008, a compound of this class typically shows dimensional change below 0.3% in the flow direction after equilibration at 23°C/50% RH; published data for this specific configuration is limited, so part-level geometric validation is required for fits with clearances below 0.1 mm. The linear coefficient of thermal expansion of PA12-GF50 is anisotropic, with flow-direction values commonly between 25×10⁻⁶ K⁻¹ and 35×10⁻⁶ K⁻¹ and transverse values up to 80×10⁻⁶ K⁻¹ in the -30°C to 80°C range. These differences must be included in tolerance-stack analyses for cylindrical housings and gear centres.
Chemical resistance of the material is dominated by the PA12 matrix. Under ISO 175:2010 screening immersion at 23°C, the compound shows low mass change and tensile-retention loss in aliphatic hydrocarbons, diesel, lubricating oils, hydraulic fluids, and alkaline aqueous solutions at low concentration. It is not recommended for continuous immersion in hot concentrated mineral acids, phenols, cresols, strong oxidisers, or chlorinated solvents above 50°C; these fluids attack the amide linkage or swell the matrix and can expose glass fibre at the surface. In hot water above 80°C, moisture absorption accelerates and hydrolytic ageing reduces long-term strength; pressure-rated fluid-contact components should be tested under ISO 22088-2:2006 or equivalent constant-strain environmental stress-cracking conditions before release. The carbon black pigmentation improves surface stability under ultraviolet exposure, but weathering resistance of the glass-filled grade is not equivalent to a UV-stabilised black PA12 formulated for permanent outdoor use; retained tensile properties after 2,000 h xenon-arc testing under ISO 4892-2:2013 must be generated on the production surface finish.
Typical moulded parts include fuel-system clips, pneumatic valve bodies, pump bearing cages, end covers, and bracketry where hydrocarbon contact and dimensional stability in humid air are design requirements. For underhood parts, material-level heat-ageing data at 120°C for 1,000 h and diesel exposure at 60°C for 500 h should be supplemented with part-level testing because gate vestiges, weld lines, and orientation reduce local load capacity. In rotating components, the glass fibre lowers creep and improves dimensional stability compared with unfilled PA12, but the maximum continuous service temperature is lower than that of PA66-GF50 or PPA-GF50; short-term heat deflection temperature alone does not define long-term thermal endurance. The grade is not designated for continuous contact with potable hot water above 60°C unless the specific water-contact formulation has regulatory clearance under the applicable national approval scheme.
On reciprocating screw injection-moulding machines in the 800 kN to 1,500 kN clamp-force class, a general-purpose three-zone screw with L/D of 20:1 to 24:1 and a compression ratio of 1.8:1 to 2.2:1 is used. The feed-zone barrel temperature is set at 230°C to 250°C, compression and metering zones at 260°C to 280°C, and the nozzle at 270°C to 290°C. Melt temperature should not exceed 300°C for more than 10 min cumulative residence. Mould temperature is held at 80°C to 100°C for reproducible crystallinity, but tools running below 60°C produce lower weld-line strength and visible flow marks. Gates should be at least 60% to 80% of the adjacent wall thickness, with land lengths not exceeding 1.0 mm. Fill and pack are separated at 95% to 98% of the filled volume; for a 2.0 mm wall, hold pressures from 60 MPa to 90 MPa are typical, but part-specific pressure-drop studies are required. The glass-fibre abrasive wear of the check ring and screw tip is monitored through cushion stability; a cushion variation above 0.5 mm or a gradual decline in screw recovery time indicates check-ring leakage and requires maintenance before the process capability index falls below 1.33.
Compared with PA66-GF50, the PA12-GF50 grade processes at lower melt temperatures and absorbs less water. Under ISO 527-2:2012, dry-as-moulded tensile strength of PA66-GF50 commonly exceeds 200 MPa, whereas PA12-GF50 is typically below 160 MPa; heat deflection temperature at 1.80 MPa under ISO 75-2:2013 is also higher for PA66-GF50. When the loading environment is damp or cold, PA12-GF50 retains a higher fraction of its room-temperature Charpy notched impact at -40°C under ISO 179-1:2023 and shows less part growth, so substitution into high-temperature under-bonnet structures should not be made on moisture resistance alone. Relative to PA12-GF30, the 50% fibre system typically raises tensile modulus by 60% to 80%, reduces strain at break to 3% or below, and lowers notched Charpy impact at 23°C under ISO 179-1:2023 by 30% to 50%; snap-fit designs requiring high post-yield deflection are therefore more constrained than with PA12-GF30. Published data for this specific configuration is limited for direct side-by-side substitution with PPA-GF50, and part-level thermal ageing at 150°C or higher is required before such substitution. The grade should not be specified where continuous operating temperature exceeds the supplier’s thermal endurance index under UL 746B or IEC 60216, or where the component is subjected to hot concentrated mineral acid service.
