| HS Code | 128856 |
| Density | 1.01 g/cm³ |
| Water Absorption At Saturation | 1.8 % |
| Tensile Modulus Conditioned | 1100 MPa |
| Tensile Stress At Break Conditioned | 45 MPa |
| Tensile Strain At Break Conditioned | 250 % |
| Flexural Modulus Conditioned | 900 MPa |
| Charpy Notched Impact Strength Conditioned | 60 kJ/m² |
| Charpy Unnotched Impact Strength Conditioned | No break |
| Melting Point | 178 °C |
| Glass Transition Temperature | 50 °C |
| Heat Deflection Temperature At 1 8 Mpa | 45 °C |
| Heat Deflection Temperature At 0 45 Mpa | 75 °C |
As an accredited EMS-Grivory Grilamid XE 3926 black 9992 Nylon 12, Conditioned factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaging: 25 kg net in sealed, moisture-proof polyethylene liner inside a multi-ply paper bag, clearly labeled with product identification. |
| Container Loading (20′ FCL) | 20' FCL: Conditioned Grilamid XE 3926 nylon 12 pellets, packed in sealed bags, loaded and secured for safe transport. |
| Shipping | Grilamid XE 3926 is shipped as conditioned nylon 12 granules in sealed, moisture-barrier bags to preserve properties. Standard dry cargo transport applies; keep away from excessive heat, humidity, and direct sunlight. No hazardous goods classification; palletize and protect from physical damage during handling. |
| Storage | Store Grilamid XE 3926 black 9992 in its original sealed container, in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and moisture. Keep the container tightly closed when not in use to prevent water absorption and contamination. Ideal storage temperature is 20–25°C, and for optimal molding, dry the resin before processing. |
| Shelf Life | Shelf life is typically 5 years when stored in original packaging in a cool, dry place away from sunlight. |
Industrial application boundary conditions for the conditioned 30 wt% glass-fibre-reinforced polyamide 12 grade are summarised below. The values in the matrix are processing thresholds, not sector-specific regulatory approvals; each finished part must be evaluated in its final geometry and service environment.
| Parameter | Value or tolerance | Reference method |
|---|---|---|
| Glass-fibre loading | 30 wt% | ISO 3451-1 |
| Residual moisture before moulding | ≤ 0.10 wt% | ISO 15512 |
| Pre-dry condition | 80 °C for 4–6 h | Desiccant dryer, dew point ≤ -30 °C |
| Melt temperature window | 230–260 °C | ISO 11357-1 |
| Mould temperature window | 30–80 °C | Cavity-surface thermocouple |
| Regrind limit | 10–20 wt% maximum depending on sector | Lot-segregated process audit |
In gasoline evaporative emission circuits, SAE J2044 connection profiles are validated through thermal cycling, pressure impulse, and chemical immersion sequences that expose the retention window to Fuel C, CM15A, and sour fuel. Components injection-moulded from 30 wt% glass-fibre-reinforced polyamide 12 keep insertion force and seal retention inside specification because the reinforcement reduces diametrical creep at the clip window after 1,000 h at 85 °C. The formulation addition ratio is fixed by the compound at 30 wt% chopped glass, measured by ISO 3451-1 ash content. Processors restrict post-industrial regrind to 20 wt% of total shot mass because higher regrind increases brittle failure at pin-gate weld lines, particularly after cold-start flash-off when residual fuel vapour condenses and plasticises the surface. Moulding is performed on hydraulic injection machines with barrel temperatures from 230 °C to 260 °C, mould temperature 60–80 °C, and pre-drying at 80 °C for 4–6 h to 0.10 wt% maximum moisture. Terminal products include fuel line quick connectors, evaporative canister purge valve bodies, fuel pump flange retainers, and carbon canister attachment clips.
Field data from underhood production lines show that the weld line at the retainer window becomes the limiting feature when injection velocity exceeds 120 mm/s linear flow-front speed, because glass-fibre orientation transverse to the knitted region reduces tensile strength to less than 60% of the surrounding matrix. The processing window therefore places the gate at the base of the retention feature and uses sequential valve gating to shift the weld line into the non-loaded body section. The conditioned granulate at 50% RH according to ISO 291 absorbs approximately 0.8–1.0 wt% moisture before moulding; without drying, the resulting viscosity drop shifts fill pressure by 15–20% and produces sink marks around steel core pins. Finished-part compliance is referenced to REACH Regulation EC 1907/2006 and RoHS Directive 2011/65/EU; fuel-contact suitability is evaluated under the OEM-specific sequence derived from SAE J2044, not under food-contact codes.
Across heavy commercial vehicle compressed air circuits, push-to-connect fitting bodies made from glass-filled polyamide 12 are qualified under ISO 14743:2020 and mated to tubing validated under SAE J844. The compound already contains 30 wt% chopped glass; processors who dilute with unfilled PA12 reclaim at 15 wt% or higher observe a drop in pressure retention after 85 °C hot-air ageing because the unreinforced matrix creeps around the collet retention ring and opens the leak path. Injection moulding is conducted on valve-gated hot-runner moulds with clamp force above 3 kN per cm² of projected area, melt temperature 240–260 °C, and mould temperature 50–80 °C. Terminal products include push-to-connect fitting bodies for 8–16 mm OD PA11/PA12 tubes, brake valve body inserts, air suspension solenoid manifolds, and compressed air distribution blocks.
Weld line placement at the tube stop shoulder has a direct influence on burst pressure: short-shot studies show that a melt-front temperature below 215 °C at the weld line reduces burst pressure by 12–18% compared with a melt-front temperature above 225 °C. Production-scale injection machines with screw L/D ratios of 18:1–20:1 are preferred because high-shear plastication causes glass-fibre length attrition from a nominal 300 µm to below 180 µm after 300 s residence time, which depresses notched Charpy impact measured according to ISO 179-1/1eA. Since the material is supplied in a conditioned state, pre-drying must still be carried out at 80 °C until residual moisture is 0.10 wt% or less; otherwise steam hydrolysis at the collet retention tabs produces surface silver streaking and intermittent leakage in 6 bar air leak tests. The operational boundary is set at continuous dry-air service above 100 °C only with an OEM-specific creep-rupture curve, because the glass-filled grade enters a creep regime where the collet retention force can decay by more than 20% over 5,000 h.
For closed-vane impellers used in circulator pumps and water meters, the fluid gap between the impeller shroud and the pump chamber wall is below 0.15 mm in high-efficiency circulators, so dimensional stability becomes the primary acceptance criterion. The glass-fibre loading is fixed at 30 wt% according to ISO 3451-1, and potable-water approval requires that no additional filler or processing aid be introduced. Only regrind from the same production lot at 20 wt% maximum is permitted when NSF/ANSI 61 or WRAS BS 6920 compliance must be retained. Injection moulding uses a cold runner with full-round 6–8 mm primary runners and sequential edge gates to avoid weld lines at blade tips; melt temperature is held to 230–250 °C and mould temperature to 70–80 °C. Finished part types include multi-stage submersible pump impellers, flow-meter measuring chambers, boiler feed-water pump vanes, irrigation zone valve rotors, and water softener valve pistons.
Hydrolysis resistance of PA12 is the reason for its use in circulating-water systems, but the glass-fibre sizing layer is the limiting boundary: above 80 °C continuous water contact, fibre-matrix debonding at the shroud edge advances at a rate that cannot be offset by conditioning. The weight gain after 500 h in 80 °C water is measured according to ISO 62:2008 and is typically below 2.0 wt%; linear expansion across the impeller diameter remains below 0.5% only if the moulded part is annealed for 2 h at 100 °C before machining. Compliance is referenced to NSF/ANSI 61 for North American potable water contact, WRAS BS 6920 for UK water fittings, KTW-BWGL for German plastic contact, and ACS for French approval; each certification applies to the specific finished part number, not to the raw granulate alone.
Within rail and outdoor electrical cabinets, sealed polyamide enclosures exposed to tropical damp-heat cycling are evaluated under IEC 60068-2-30 and IEC 60664-1 for creepage and clearance stability. The material’s 30 wt% glass-fibre reinforcement limits post-mould shrinkage to 0.25–0.45% in the flow direction, but this also produces anisotropic warpage that must be corrected by runner balance in multi-cavity tools. Black 9992 already contains carbon black pigment; processors do not add masterbatch because dispersion variations shift surface resistivity and degrade insulation coordination. The recommended processing window is melt temperature 240–260 °C, mould temperature 60–80 °C, and a screw-back position that retains melt residence time below 600 s in the rear zone. Terminal products include EV battery management bracket housings, railway signal enclosure shells, industrial sensor bodies, and DIN rail mounted relay carriers.
According to UL 746B, long-term thermal ageing indices for glass-filled polyamide 12 are generally lower than heat-stabilised PA66, so continuous service above 105 °C is not recommended for this grade unless a separate end-use RTI is obtained on the specific thickness. Glow-wire performance under IEC 60695-2-11 for unexposed components is typically limited; applications needing 650 °C GWIT or V-0 classification must use a flame-retardant polyamide grade, because adding halogenated masterbatch to this product shifts hydrolysis resistance and violates the stated glass-fibre ratio. Pre-drying at 80 °C for 4–6 h is mandatory before moulding to 0.10 wt% maximum moisture; otherwise surface defects at the connector sealing face reduce partial discharge inception voltage in on-line testing. The material should not be combined with amine-based processing aids in this application, because amine migration into the seal groove can generate surface tack under damp-heat cycling.
For diagnostic equipment housings and surgical tool body shells produced in cleanroom conditions, 30 wt% glass-fibre-reinforced polyamide 12 combines low-temperature snap-fit strength with lower moisture uptake than PA66. Cytotoxicity acceptance follows ISO 10993-5 and ISO 10993-10 only when the part is tested as a moulded article; the raw granulate supplier does not grant implant-grade status. The formulation addition ratio is fixed by the compound at 30 wt% glass fibre with no impact modifier; device manufacturers restrict regrind to 10 wt% because higher regrind increases extractable fibre ends and can change the surface roughness of snap-fit arms by more than 0.2 µm Ra in cleanroom moulding. Moulding is performed on electric injection machines with chrome-plated moulds, melt temperature 235–255 °C, and mould temperature 50–70 °C. Terminal parts include diagnostic ultrasound housing shells, surgical stapler body frames, IV pump chassis components, and non-implant orthopaedic tool handles.
Validation of snap-fit retention after simulated transportation at -20 °C is a known process gate: parts moulded with residual moisture above 0.10 wt% exhibit a drop in low-temperature notched impact, measured by ISO 179-1/1eA, because hydrolysis during plastication shortens the polyamide chain. The conditioned material state refers to a defined moisture level in sealed packaging for stable processing, but it does not replace drying; processors dry to 0.10 wt% maximum before the hopper. Gamma or electron-beam sterilisation at 25–40 kGy may shift black 9992 colour slightly and reduce tensile elongation at break by 10–20%; ethylene oxide and hydrogen peroxide low-temperature sterilisation are preferred when dimensional integrity is critical. Published data for this specific grade at higher radiation doses is limited, so each finished device must be tested in its final packaging configuration. Compliance records must also address REACH EC 1907/2006 Article 33 communication for any SVHC above 0.1 wt%.
When a beverage dispenser flow sensor is converted from POM to 30 wt% glass-reinforced PA12, the main constraint is not chemical resistance but the sealing-surface finish required for dynamic O-rings. Food-contact applications in beverage dispensing and commercial coffee machines require migration testing under Regulation (EU) No 10/2011 and, for U.S. components, 21 CFR 177.1500 for nylon resins, with the specific additive package covered by the supplier’s food-contact statement. The addition ratio remains 30 wt% chopped glass; no regrind from non-food grades may be introduced, and production segregation limits virgin/regrind blends to 15 wt% same-grade regrind to avoid migration failures. Moulding is carried out on all-electric machines with hot-runner shut-off nozzles, melt temperature 240–255 °C, mould temperature 60–80 °C. Finished components include flow sensor housings, coffee machine pump manifolds, beverage dispenser valve bodies, and dairy fitting adapters.
Glass fibre at 30 wt% makes the moulded surface less smooth than unfilled PA12; for dynamic O-ring sealing grooves, the moulded surface is kept without additional release agents because silicone-based mould release can fail food-contact extraction tests. Fibre protrusion at the sealing surface is controlled by mould temperature at 80 °C and a two-stage injection velocity profile, with the second stage limited to 30–50% of peak velocity to prevent jetting. In food-contact water exposure at 70 °C, water absorption stabilises below 1.5 wt% by ISO 62:2008; components are conditioned in 23 °C/50% RH for 48 h before final dimensional audit. The operational boundary is set by hot-water stagnation: exposure to 85 °C water for more than 2,000 h reduces the sealing groove diameter by up to 0.3%, which may require re-machining or a design review of the O-ring compression ratio.
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The product identifier Grilamid XE 3926 black 9992 Nylon 12, Conditioned denotes an EMS-GRIVORY polyamide 12 extrusion grade supplied as black 9992 carbon-black-pigmented pellets and evaluated in the moisture-conditioned state described by ISO 291:2008 and ISO 1110:2019. The grade is an elastomer-modified, thermally stabilised PA12 compound developed for flexible single-layer tube, hose, cable sheathing, spiral conduit and fluid-transfer profiles in which low water absorption, low-temperature flexibility, hydrocarbon resistance and ultraviolet stability are required. Conditioning at 23 °C and 50 % RH brings the polyamide 12 matrix to approximately 0.45 wt% moisture, compared with saturation around 0.70 wt% when tested by ISO 62:2008 at 23 °C. The 9992 colour designation indicates a carbon black formulation that screens ultraviolet radiation and reduces loss of tensile elongation after outdoor ageing. Base resin density is approximately 1.02 g/cm³ under ISO 1183-1:2019.
Moisture absorption in polyamide 12 reduces hydrogen bonding between amide groups, which lowers stiffness and yield stress while increasing elongation and impact toughness. In unfilled elastomer-modified PA12, the effect is measurable but smaller than in PA6 or PA66 because equilibrium moisture content is intrinsically lower. For Grilamid XE 3926 black 9992, the dry as-moulded tensile modulus measured by ISO 527-1/-2:2012 is generally quoted in the 900–1400 MPa range, while the conditioned modulus shifts to approximately 700–1000 MPa. Tensile stress at yield follows the same trend: dry values are typically 30–40 MPa, and conditioned values fall to 20–30 MPa. Elongation at break remains above 50 % in both states, which is the principal reason the grade is used in dynamic flexing applications rather than glass-fibre-reinforced PA12, where elongation at break is typically below 10 %. Charpy notched impact energy by ISO 179-1/1eA:2023 is strongly moisture-sensitive: dry values near 8–12 kJ/m² can rise to more than 25–35 kJ/m² after conditioning at 23 °C. Shore D hardness determined by ISO 868:2003 decreases by roughly 4–6 points after conditioning, indicating the surface softening that contributes to improved grip and reduced notch sensitivity in extruded profiles.
| Property | Test method | Dry as-moulded | Conditioned |
|---|---|---|---|
| Tensile modulus | ISO 527-1/-2:2012 | 900–1400 MPa | 700–1000 MPa |
| Tensile stress at yield | ISO 527-1/-2:2012 | 30–40 MPa | 20–30 MPa |
| Elongation at break | ISO 527-1/-2:2012 | >50 % | >50 % |
| Charpy notched impact, 23 °C | ISO 179-1/1eA:2023 | 8–12 kJ/m² | 25–35 kJ/m² |
| Shore D hardness | ISO 868:2003 | 60–65 | 55–60 |
The conditioned data are not an upper performance limit but a reference state for end-use simulation. In extruded tubing, the increase in impact energy from moisture uptake reduces the risk of brittle cracking when coiled tube is unwound at −20 °C; however, the corresponding modulus reduction must be accounted for in burst-pressure calculations under ISO 1402:2021 for thermoplastic hose assemblies. The shift between dry and conditioned values also affects the relationship between short-term tensile strength and long-term hydrostatic strength; therefore, pipe or hose derived from this grade should not be qualified using dry room-temperature data alone.
On production-scale single-screw extrusion lines, the thermal processing window for Grilamid XE 3926 black 9992 is relatively narrow. Preheat drying in a dehumidified-air dryer at 80 °C for 4–6 h should reduce residual moisture to below 0.05 wt%; processing with moisture content above 0.10 wt% produces surface splay, internal porosity, and hydrolytic degradation. A barrier screw with an L/D ratio of 24:1–30:1 and compression ratio of 2.5:1–3.2:1 is typical for PA12 extrusion. Barrel setpoints from feed throat to die are commonly 200/210/220/230/240 °C, and melt temperature should be maintained at 220–250 °C by an immersion thermocouple at the breaker plate. Melt temperature above 250 °C degrades the modifier and produces black specks from carbon black agglomeration; below 220 °C, carbon black dispersion becomes incomplete and surface roughness increases. Operators on 45 mm and 60 mm extruders use gear pumps to limit pressure pulsation to less than 0.5 % of set throughput. Screw speed on a 25 mm laboratory extruder is typically 30–80 rpm; on a 45 mm line, screw speed is adjusted to achieve 50–120 kg/h depending on die diameter and downstream cooling capacity. At typical tube extrusion shear rates of 100–500 s⁻¹, apparent melt viscosity is in the range of 200–500 Pa·s at 230 °C. The draw-down ratio from die exit to calibration sleeve should not exceed 3:1 for tube outer diameters above 10 mm because PA12 melt strength is lower than that of PA6.
| Parameter | Setting or range | Unit or condition |
|---|---|---|
| Pre-drying temperature | 80 °C | dehumidified-air dryer |
| Pre-drying time | 4–6 h | to residual moisture below 0.05 wt% |
| Barrel profile | 200/210/220/230/240 °C | feed to die |
| Melt temperature | 220–250 °C | immersion thermocouple |
| Screw compression ratio | 2.5:1–3.2:1 | single-screw extruder |
| Draw-down ratio | <3:1 | tube OD above 10 mm |
| Vacuum sizing differential | 0.2–0.6 bar | calibration sleeve |
Vacuum sizing with a pressure differential of 0.2–0.6 bar and a calibration sleeve 10–20 % larger than final outer diameter is preferred for maintaining ovality below 0.5 % in coiled tubing. A screen pack of 60/80/60 mesh is placed before the breaker plate on 45 mm lines to trap carbon black agglomerates; screen pressure drop should be recorded and the pack changed when differential pressure exceeds 100 bar, typically after 8–12 h of continuous operation depending on raw-material cleanliness. The grade should not be purged with PA66 or PBT residues; a transition purge using natural PA12 or polyolefin is preferred to avoid delamination in multi-material extrusion lines. Post-extrusion moisture conditioning can be accelerated by storage at 23 °C and 50 % RH, or by water immersion at 40 °C for a period determined by wall thickness; however, rapid water cooling from the melt at 10–20 °C should be avoided when dimensional stability is critical because residual thermal stress can produce ovality and longitudinal curvature after coiling.
Grilamid XE 3926 black 9992 differs from PA6 and PA66 extrusion grades primarily in moisture uptake, density, and low-temperature impact. Under ISO 62:2008 saturation testing, PA6 absorbs approximately 9.5 wt% water, PA66 approximately 8.5 wt%, and PA12 approximately 0.70 wt% at 23 °C. This low moisture uptake reduces dimensional change and preserves electrical insulation in humid cable conduits and compressed-air distribution systems. The density of 1.02 g/cm³ under ISO 1183-1:2019 gives a mass reduction of 8–12 % per metre of tube compared with PA6 or PA66 of identical wall thickness. Compared with PA11, PA12 has a melting point of approximately 176–178 °C, slightly lower than the 185–190 °C typical for PA11, but both materials share similar low-water-uptake behaviour and low-temperature flexibility. In fuel vapour and diesel lines, PA12 provides better hydrocarbon resistance than PA6 and is used in single-layer applications where the permeation requirements of SAE J2260 do not require multilayer EVOH or fluoropolymer barrier construction. The black 9992 carbon black package avoids the migration risk of monomeric UV absorbers used in unpigmented PA11 and maintains weatherability of the extruded surface under outdoor exposure.
Where coiled air brake tubing, hydraulic hose sheathing, or wind-turbine cable protection must endure repeated flexing at −30 °C, unmodified standard-viscosity PA12 can embrittle even after conditioning. Grilamid XE 3926 black 9992 is selected over unmodified PA12 because the elastomeric modifier shifts the ductile-to-brittle transition below the operating temperature. Charpy notched impact testing under ISO 179-1/1eA:2023 at −30 °C for elastomer-modified PA12 typically remains above 8 kJ/m², whereas unmodified PA12 in the dry state may fall below 5 kJ/m². The modified grade also shows improved resistance to zinc chloride solutions encountered in road de-icing environments, although concentrated zinc chloride at 50 °C can still cause stress cracking unless the part is annealed or the design eliminates residual tensile stress. Continuous-use temperature in air is generally limited to 80–100 °C depending on the thermal index assigned by the insulation system; short-term peak exposure up to 130 °C during paint cycle or connector overmoulding is possible but requires evaluation under actual mechanical load and environmental exposure. The modulus reduction from elastomer modification is approximately 15–25 % relative to unmodified PA12 of similar viscosity, which increases flexibility but lowers hoop strength in pressurised tube applications.
Compliance documentation for Grilamid XE 3926 black 9992 should be requested from EMS-GRIVORY for the specific shipment lot. Declarations commonly cover EU Directive 2011/65/EU (RoHS) and Regulation (EC) No 1907/2006 (REACH) as applicable to articles and packaging. Food-contact use is not implied by the standard extrusion grade; applications requiring food-contact status must be verified against EC 1935/2004 and FDA 21 CFR 177.1500 for nylon 12 at the intended temperature and extraction conditions. In wire and cable sheathing, carbon black pigmentation lowers volume resistivity relative to natural PA12; volume resistivity under IEC 62631-3-1:2016 is generally in the 1012–1014 Ω·m range, suitable for secondary protective sheathing but not primary high-voltage insulation without additional insulation design. Dielectric strength under IEC 60243-1:2013 is thickness-dependent and is typically in the 25–35 kV/mm range for a 1 mm plaque conditioned at 23 °C and 50 % RH. Batch-to-batch melt viscosity should be monitored by ISO 1133-1:2022 melt volume-flow rate at 235 °C with 5 kg load; an acceptance range of ±15 % from the qualified reference value is practical for extrusion-grade PA12. Production lots should be segregated from uncured or amine-containing compounds to avoid reactive contamination and surface deposit formation during extrusion.
Chemical resistance under ISO 175:2010 is characteristic of PA12: aliphatic hydrocarbons, mineral oil, grease, and diesel fuel produce minor dimensional change; concentrated formic acid, phenols, and strong mineral acids degrade the material. Conditioning before chemical immersion stabilises dimensions because the matrix is already at equilibrium moisture content. The low water migration of PA12 also reduces hydrolysis of adjacent metallic fittings in fluid connectors compared with PA6. For outdoor cable sheathing, the carbon black package provides UV resistance, but the surface should be tested for colour retention and crack formation under ISO 4892-2:2013 if prolonged direct sunlight is expected. Published data for this specific configuration under all chemical immersion combinations is limited; qualification for fuel or oil contact should therefore include component-level tests with the actual compounded fluid and thermal ageing conditions.
