| HS Code | 516664 |
| Density | 1.01 g/cm³ |
| Melting Point | 178 °C |
| Tensile Modulus | 1600 MPa |
| Tensile Strength At Break | 50 MPa |
| Elongation At Break | 200 % |
| Flexural Modulus | 1200 MPa |
| Charpy Notched Impact Strength At 23 C | 20 kJ/m² |
| Charpy Unnotched Impact Strength At 23 C | No break |
| Heat Deflection Temperature At 0 45 Mpa | 140 °C |
| Heat Deflection Temperature At 1 80 Mpa | 50 °C |
| Vicat Softening Temperature | 170 °C |
| Water Absorption At 24 H | 0.8 % |
As an accredited EMS-Grivory Grilamid XE 3959 black 9992 Nylon 12, Dry factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied as dry nylon 12 pellets in sealed 25 kg bags, ensuring moisture protection and safe handling. |
| Container Loading (20′ FCL) | Load 20′ FCL with dry EMS-Grivory Grilamid XE 3959 black 9992 Nylon 12 resin in sealed bags, palletized and secured for safe transport. |
| Shipping | Ship in original, sealed moisture-barrier packaging to preserve Grilamid XE 3959’s dry condition. Avoid exposure to humidity, direct sunlight, and excessive heat during transit. Use standard dry freight in clean, ventilated containers, and secure pallets to prevent damage. Keep away from contaminants and store in a cool, dry area until use. |
| Storage | Store Grilamid XE 3959 black 9992 Nylon 12 in its original, tightly sealed moisture-proof container in a cool, dry, well-ventilated area. Keep away from heat, direct sunlight, flame, and ignition sources. Protect from atmospheric moisture and contamination, as the polymer absorbs water. After each use, reseal immediately; use desiccant if necessary. Avoid excessive temperatures. |
| Shelf Life | Store sealed in dry, original packaging. Shelf life is typically two years from manufacture date if kept cool and dry. |
Co-extruded automotive fuel vapour extraction lines using Grilamid XE 3959 black 9992 are produced as a multilayer wall architecture: an outer PA12 jacket, an intermediate tie resin, a fuel-impermeable barrier layer, and, where static dissipation is required, a conductive inner layer. The outer jacket addition ratio is fixed at 100 phr of the dry product as supplied; because the black 9992 colour package is formulated for opacity, additional carbon black masterbatch is not required for colour development in the outer jacket, and ultraviolet stabilisation is confirmed against the OEM weathering specification rather than inferred from the black coloration. Where a conductive PA12 inner layer is used instead of a fluoropolymer barrier, 5–8 wt% conductive carbon black masterbatch is compounded in a dedicated inner-layer extruder and is not blended into the outer jacket stream. Finished tube compliance is validated against SAE J2260 for non-metallic low-permeation fuel tubing, ISO 19013-1 for fuel circuit hose and tubing, and DIN 73378 where European OEM approvals are in force. Downstream production runs on single-screw extruders with L/D 24:1 to 30:1, with a grooved feed section only in the inner-layer barrel; the outer layer is processed at a melt temperature of 220–245 °C and a die-head pressure below 280 bar. Vacuum calibration at 25 °C water temperature followed by a 60–80 °C annealing tunnel stabilises outer diameter and suppresses post-extrusion shrinkage. Terminal product types include fuel vapour return lines, canister purge lines, fuel filler neck vent lines, and quick-connector-equipped fuel system drops with co-extruded barrier construction. The primary production failure mode is surface pimpling and intermittent melt fracture when pellets are not dried to below 0.10% residual moisture; hopper drying at 80 °C for 4–6 hours with a dew point of −30 °C or lower is required before the vacuum port is closed. Batch-to-batch melt pressure variation is controlled by recording throughput per hour and by measuring melt flow index under ISO 1133-1:2022 on retained samples.
Commercial-vehicle air brake circuits process Grilamid XE 3959 black 9992 in outside diameters of 6 mm, 8 mm, and 10 mm with wall thicknesses of 1.00 mm and 1.25 mm, typically in coiled or pre-formed configurations. The use ratio is 100 wt% dry pellets as supplied; edge-trim and scrapped-coil regrind is added up to 15 wt% only after the ground flake has been dried below 0.08% residual moisture and screened through a 1000 μm mesh to remove fines. Compliance for the finished tube is governed by SAE J844 for non-metallic air brake tubing, ISO 7628-1 for commercial-vehicle air brake systems, and FMVSS 571.106 where North American brake system homologation applies. Production uses single-screw extruders with L/D 24:1 to 28:1, compression ratios of 2.5:1 to 3.0:1, and screen packs at 150 and 250 mesh to trap degraded microgels generated by prolonged residence time. Melt temperature is held between 225 °C and 240 °C; excursions above 250 °C cause yellowing and a measurable fall in burst pressure after oven ageing. Vacuum sizing tanks are run at 25–35 °C with internal mandrel pressure controlled to 0.4–0.8 bar for roundness, while coil set memory is reduced by post-extrusion annealing at 80 °C for 3 hours. Terminal product types include trailer air brake coils, gladhand supply lines, suspension levelling lines, and pre-formed tractor-to-trailer jumpers. The most frequent line failure is ovality below 90% roundness when vacuum fluctuation occurs; laser diameter gauges positioned at the first and second cooling stages record 360° profiles every 10 seconds.
| Application | Standard | Test/validation condition | Boundary |
|---|---|---|---|
| Fuel vapour return | SAE J2260, ISO 19013-1 | Permeation after heat ageing | OEM specification; no universal fixed value across all grades |
| Air brake coils | SAE J844, ISO 7628-1 | Cold impact at −40 °C | No fracture or visible crack |
| Pneumatic tube | ISO 14743, ISO 4414 | Burst pressure at 3× working pressure | No leakage or fitting blow-off |
| Cable jacket | ISO 6722-1, SAE J1128 | Scrape abrasion and 240 V withstand | No conductor exposure |
Pneumatic control circuits installed in semiconductor cleanrooms and CNC machine tools use Grilamid XE 3959 black 9992 in tube outside diameters from 4 mm to 16 mm with wall thicknesses from 0.75 mm to 1.50 mm. The formulation addition ratio is 98–99 wt% of the product and 1–2 wt% of a PA12-compatible processing aid masterbatch when wall thickness falls below 1.0 mm; above 2 wt% the processing aid reduces burst pressure and fitting retention in hard metric tube sizes. Compliance is validated under ISO 14743 for thermoplastic pneumatic tubing and ISO 4414 for pneumatic system safety, with additional cleanliness requirements imposed by wafer-fab end users for particle shedding. Downstream production uses single-screw extruders with L/D 25:1, barrier screws, a melt pump for closed-loop pressure control, and vacuum water calibration at 30–40 °C to control wall tolerance to ±0.05 mm on 4 mm and 6 mm OD sizes. Terminal product types include polyamide pneumatic tubing coils, tube-to-push-in-fitting assemblies, and pre-formed anti-kink jumpers for robotic work cells. The main processing boundary is moisture: after opening the 25 kg bag, material left in an unheated hopper for more than 4 hours at relative humidity above 60% can develop surface worming; processors either blanket the hopper with dry air at −20 °C dew point or use a closed dosing system. Dimensional drift caused by melt pump suction fluctuation is managed by maintaining a hopper level of at least 25% of capacity and by rejecting any extruded section with wall-thickness standard deviation greater than 0.02 mm across a 100 m coil.
Low-voltage cable sheathing lines running Grilamid XE 3959 black 9992 apply the product at 100 phr as supplied to copper conductor bundles in engine compartments, robotic cable tracks, and battery-management sensing circuits. A separate conductive carbon black concentrate at 5–8 wt% is compounded only when the finished jacket must demonstrate surface resistivity below 109 Ω under IEC 60093; without that addition the black 9992 coloration cannot be assumed to provide static-dissipative performance. Compliance is verified against ISO 6722-1 for road-vehicle low-voltage cable, SAE J1128 for primary cable, RoHS Directive 2011/65/EU Annex II substance restrictions, and REACH SVHC obligations for the compounded jacket material. Downstream production uses a crosshead die on a single-screw extruder with L/D 24:1 to 30:1, melt temperature held at 230–245 °C, and conductor preheat at 90–110 °C to reduce melt fracture at high line speeds between 80 m/min and 250 m/min. Eccentricity is controlled by dual-axis laser diameter gauges positioned 100 mm after the die exit; eccentricity drift above 5% is the primary rejection criterion. Terminal product types include automotive engine harness cable jackets, EV battery management sense-wire sheathing, and continuous-flex robotic cable carrier sheathing. The operational boundary is that amine-based flame-retardant masterbatches are not used in direct combination with the PA12 jacket layer because they accelerate chain scission during extended residence times above 60 minutes; halogen-free systems must be evaluated on a separate compounding line to avoid cross-contamination.
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EMS-Grivory Grilamid XE 3959 black 9992 Nylon 12, Dry is an unfilled, impact-modified, heat-stabilised polyamide 12 compound supplied as black-pigmented granules. The “Dry” designation refers to a controlled moisture condition at packaging, not a post-moulding drying instruction. Under normal closed-bag storage, water content is maintained below 0.10 % when assessed by ISO 15512. The unfilled structure removes fibre-orientation anisotropy, while the elastomer modification lowers tensile modulus relative to rigid unfilled PA12 and raises practical elongation at break. Because the grade is dry as supplied, it is suitable for closed-hopper conveying and direct injection moulding without ambient moisture correction when bags remain sealed and within storage shelf life.
The ISO 1043 family classification places the material in the PA12 impact-modified group; the black 9992 suffix is the EMS-Grivory colour code for a carbon-black pigmented surface. The carbon-black package contributes to ultraviolet surface stabilisation but does not override the base resin’s thermal stabiliser. Lot-specific certificates supply the actual melt-flow index, moisture content, and colour acceptance values.
Published typical values are generated on dry-as-moulded specimens, generally injection-moulded to ISO 3167 multipurpose dimensions and tested in the dry state. Because polyamide 12 absorbs water and shifts mechanical response, dry values are only comparable when the moisture condition is stated. The table below summarises representative mechanical and thermal values for black 9992.
| Property | Standard | Value |
|---|---|---|
| Density | ISO 1183-1 | 1.01 g/cm³ |
| Water absorption, saturation at 23 °C | ISO 62 | 1.5 % |
| Tensile modulus | ISO 527-1/-2 | 1100 MPa |
| Yield stress | ISO 527-1/-2 | 30 MPa |
| Yield strain | ISO 527-1/-2 | 5 % |
| Nominal strain at break | ISO 527-1/-2 | >50 % |
| Charpy notched impact strength, 23 °C | ISO 179-1/1eA | no break |
| Charpy notched impact strength, -30 °C | ISO 179-1/1eA | 8 kJ/m² |
| Charpy unnotched impact strength, 23 °C | ISO 179-1/1eU | no break |
| Melting temperature | ISO 11357-1/-3 | 174 °C |
| Heat deflection temperature, 1.80 MPa | ISO 75-1/-2 | 50 °C |
| Heat deflection temperature, 0.45 MPa | ISO 75-1/-2 | 120 °C |
| Vicat softening temperature, B50 | ISO 306 | 140 °C |
The 1100 MPa tensile modulus under ISO 527-1/-2 is a dry value; after conditioning at 23 °C/50 % RH, PA12 may take up approximately 0.7 % water, and modulus falls by 10–15 %. The no-break Charpy result at 23 °C is a notch-configuration-specific observation; sharp radii, weld lines, and moulded-in stress may reduce toughness.
Processing requires desiccant drying at 80 °C for 4–8 h to a residual moisture target of ≤0.10 %. The melt-temperature range for injection moulding is 190–240 °C; extrusion operations should remain at the lower end of the range to avoid uncontrolled residence time. Tool temperatures of 40–80 °C provide sufficient crystallinity development without excessive cycle time. The upper melt-temperature limit is 250 °C; at or above this boundary, thermal-oxidative chain scission accelerates, producing brown streaking, surface splay, and reduced low-temperature impact.
On production machines of 1000–2000 kN clamp force, a general-purpose nonreturn screw with L/D 20:1–25:1 is adequate if the metering zone temperature is controlled to ±5 °C. Vent zones should remain closed or be connected to a low-vacuum line; open vents can reintroduce moisture in humid plants.
| Parameter | Condition or value |
|---|---|
| Pre-drying temperature | 80 °C |
| Pre-drying time | 4–8 h |
| Residual moisture target | ≤0.10 % by ISO 15512 |
| Melt temperature range | 190–240 °C |
| Tool temperature range | 40–80 °C |
| Maximum melt temperature | 250 °C |
| Recommended screw residence time | <10 min |
| Drying air dew point | ≤-30 °C |
Mould shrinkage follows PA12 unfilled behaviour, typically 0.7–1.2 % in the flow direction and 0.8–1.3 % transverse to flow when measured by ISO 294-4. Post-moulding moisture uptake adds dimensional change of approximately 0.2–0.4 %; parts that must hold tight tolerances under humid conditions should be conditioned and checked after equilibrium. Gate size should be 60–80 % of maximum wall thickness; restricted gates raise shear heating and may degrade the elastomer phase.
Production-scale failure modes observed on line include gate blush when injection velocity exceeds the melt front’s critical shear rate, splay from inadequately dried granules, and weld-line cracks at cold-runner intersections when the tool is run below 40 °C. Reducing screw speed to 80–120 rpm on a 35 mm screw and raising tool temperature to 60–80 °C can eliminate surface defects in thick sections.
Relative to unmodified unfilled PA12, the tensile modulus of 1100 MPa is below the 1400–1700 MPa band typical of rigid unfilled PA12, while the notched Charpy response at 23 °C shifts from a conventional 5–7 kJ/m² range to a no-break result. Against PA11, the PA12 base provides similar low water absorption but melts near 174 °C versus 185–190 °C for PA11, which can reduce barrel temperatures and cooling time in injection moulding; the lower melting point also lowers heat distortion at load. Against PA6 or PA66, saturation water uptake of PA12 at 1.5 % is substantially lower than the 8–10 % range for short-chain aliphatic polyamides, producing less modulus and dimension drift in humid chassis and engine-compartment air. Against 30 % glass-fibre reinforced PA12 grades, the unfilled XE 3959 trades tensile modulus near 6000 MPa for elongation at break above 50 % and lower anisotropic shrinkage.
In automotive fluid-handling, cable-conduit, and pneumatic-tube connector systems, the grade is specified where resistance to aliphatic hydrocarbons, engine oil, gear oil, and zinc chloride road-salt brines is required. Snap-fit clips, quick-connect housing sleeves, and harness retainers are moulded with the material because the -30 °C notched Charpy value of 8 kJ/m² under ISO 179-1/1eA provides a measurable cold-assembly toughness margin. The dry-as-supplied state supports closed hopper dosing; however, once bags are open in high-humidity air, pre-drying is mandatory. Published data for continuous exposure to hot urea or glycol formulations in this specific black 9992 variant is limited; qualification should include immersion testing under ISO 175 or ASTM D543.
Snap-fit calculations should treat the dry yield strain of 5 % as the upper allowable outer-fibre strain for a single assembly; repeated assembly or long-term service requires a safety factor of 1.2–1.5. The low tensile modulus of 1100 MPa reduces insertion force relative to glass-filled grades, which is useful for cantilever arms with restricted deflection. The -30 °C notched Charpy value of 8 kJ/m² does not guarantee ductile behaviour at every feature: weld lines, sharp corners, gate blush, and pigment dispersion in black 9992 can shift the ductile-to-embrittlement transition upward by several degrees. Therefore prototypes should be moulded on the target production tool because a laboratory plaque cannot reproduce the shear and orientation history of a multi-cavity runner system.
Published capillary rheometry for this exact black 9992 configuration is limited; injection moulding simulation should use lot-specific pressure-volume-temperature and viscosity curves generated by capillary rheometry at the processing melt-temperature range. The unfilled, impact-modified morphology exhibits shear thinning, but numerical viscosity values must not be transferred from rigid PA12 grades.
Desiccant drying systems with a dew point of ≤-30 °C, hopper air flow of 1.8 m³/h per kg/h throughput, and 4 h residence at 80 °C maintain granulate moisture at ≤0.10 %. If opened material remains in the plant at relative humidity above 60 % for more than 30 min, surface moisture increases and should be removed before the next shift. Hot-air tray drying with uncontrolled dew point is not acceptable because surface oxidation can discolour the black 9992 concentrate and reduce melt stability. Return unused granulate to aluminium-laminated bags with desiccant sachets.
Chemical resistance follows the polyamide 12 base. Diesel fuel, ASTM reference fuel C, motor oil, washer fluid, and salt solutions are typically resisted at fluid temperatures below 60 °C. Oxygenated fuels with methanol or ethanol above 15 % by volume, hot glycol, concentrated formic acid, and strong phenolic solutions fall outside the safe stress-free exposure window. Since the black 9992 grade is often used in clips and conduits under external load, environmental stress cracking tests under ISO 22088-2 or equivalent should be part of part approval. The carbon-black pigment improves surface ultraviolet absorption, but retention of elongation after 1000 h Xenon-arc exposure under ISO 4892-2 should be verified by lot-specific data.
Regulatory conformance should be confirmed against the formulation-specific certificate. The base PA12 material is generally compliant with REACH and RoHS as a polymer article, but the black pigment and processing stabilisers must meet the 0.1 % homogeneous-material threshold for restricted substances. For food-contact or potable-water approvals, published data for this specific grade is limited; application-specific certificates from EMS-Grivory are required.
