| HS Code | 622155 |
| Density | 1.01 g/cm³ |
| Water Absorption At Saturation | 1.5% |
| Tensile Strength At Break | 55 MPa |
| Elongation At Break | 250% |
| Tensile Modulus | 1.8 GPa |
| Flexural Modulus | 1.7 GPa |
| Charpy Impact Strength Notched 23 C | 5 kJ/m² |
| Melting Temperature | 178 °C |
| Glass Transition Temperature | 45 °C |
| Heat Deflection Temperature At 0 45 Mpa | 90 °C |
| Heat Deflection Temperature At 1 8 Mpa | 50 °C |
| Volume Resistivity | 1e12 ohm·cm |
As an accredited EMS-Grivory Grilamid XE 3982 Nylon 12, Dry factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EMS-Grivory Grilamid XE 3982 Nylon 12, Dry — supplied in sealed 25 kg moisture-proof bags to preserve dryness and quality. |
| Container Loading (20′ FCL) | Load 20′ FCL with palletized dry nylon 12 granules; secure tightly, protect from moisture, and ensure safe container handling. |
| Shipping | EMS-Grivory Grilamid XE 3982 Nylon 12 (Dry) ships as sealed, moisture-resistant bags or drums to prevent water uptake. Store in a cool, dry area away from direct heat. No UN hazardous classification applies; handle with standard industrial hygiene practices and keep containers closed to preserve material properties during transit. |
| Storage | Store Grilamid XE 3982 Nylon 12 (dry) in its original, tightly sealed container in a cool, dry, well-ventilated area. Protect from direct sunlight, heat sources, and moisture to prevent water absorption. Avoid contact with oxidizing agents. Under proper conditions, shelf life is typically several years. |
| Shelf Life | Shelf life is typically two years when stored in original, unopened packaging in a cool, dry place. |
In automotive compressed-air brake tube manufacture, Grilamid XE 3982 dry polyamide 12 is processed as the neat base polymer in monolayer tubing that must satisfy SAE J844 and ISO 7628-1 cold-impact and burst-pressure requirements. The formulation addition ratio is 100% virgin resin; when ultraviolet stabilization is specified for chassis-mounted runs, a PA12-compatible carbon black masterbatch is added at 1.0–2.0 wt% at the feed throat, with the masterbatch predried at 80°C for 4 h before physical blending. On a single-screw extruder with a grooved feed zone and L/D ratio of 30:1, the barrel profile from feed throat to metering zone is maintained between 210°C and 245°C, and melt pump inlet pressure is kept below 150 bar to avoid shear-induced viscosity loss in the plasticised polyamide matrix. The molten tube is calibrated in a vacuum sleeve at -0.2 bar to -0.5 bar, quenched in a 40°C water bath, and annealed at 60°C to reduce orientation-driven dimensional recovery. Burst pressure testing per ISO 7628-1 at 23°C and -40°C is used to confirm retention of cold impact resistance without wall delamination, while residual moisture after drying is checked by ISO 15512 method B to be below 0.1%. The terminal finished product class is heavy-duty air brake tube for tractor-trailer pneumatic circuits, supplied in nominal outside diameters of 8 mm, 10 mm, and 12 mm.
In two-layer gasoline fuel vapor return tubing for spark-ignition engines, the inner hydrocarbon-contact layer consists of 100% Grilamid XE 3982, while the outer dimensionally stable layer is a stiffer PA12 or PA6/12 grade selected for bending stiffness. In the finished tube, the PA12 inner layer accounts for 60–80% of the measured wall thickness, and the dry resin is predried at 80°C for 4–6 h to a moisture content ≤0.1% prior to coextrusion. Two single-screw extruders feed a coextrusion die head at inner-layer melt temperatures of 230°C and outer-layer melt temperatures of 240°C, with die head temperature controlled at 235°C; after vacuum calibration, the tube is cut into specified lengths and fittings are inserted after flaring. Permeation of the finished tube is evaluated against SAE J2260 as a low-permeation fuel fill and vapor tube specification, with steady-state flux measured by ASTM D2684 cups at 40°C; published data for this specific XE 3982 layer configuration is limited, requiring pilot-scale permeation qualification before volume release. The terminal finished product type is evaporative emission fuel vapor return line for gasoline direct-injection engines where integrated sealing and low-temperature flexibility are required simultaneously.
Extrusion of flexible corrugated conduit from Grilamid XE 3982 uses a corrugating die head and continuous vacuum corrugator with block jaws. The resin addition ratio in the compound is 98–100 wt%, with 0.5–2.0 wt% UV-stabilized carbon black masterbatch added when outdoor or heavy-UV exposure is specified; the balance is made up by the resin itself, and all masterbatches are predried at 80°C for 4 h. The extruder is a single-screw machine with an L/D ratio of 28:1 and mixing pins in the metering section, run at a screw speed of 30–60 rpm depending on screw diameter. Melt temperatures are kept between 220°C and 245°C, and the corrugator vacuum is set at -0.3 bar to -0.6 bar to pull the melt into the block mold. The impact resistance of the conduit is evaluated at -25°C using a 2 kg striker per IEC 61386-22, and tensile elongation is measured per ISO 527-2. The terminal product is openable flexible conduit and spiral wrap for CNC machine tool cable routing and robotic harness protection, supplied in coil lengths of 50 m with nominal inside diameters from 10 mm to 50 mm.
Injection moulding of dry Grilamid XE 3982 into pneumatic push-to-connect fittings for industrial automation requires a three-zone screw with an L/D ratio of 20:1 and a non-return valve clearance below 0.05 mm. The addition ratio is 100% neat resin; regrind is limited to 10 wt% only when sorted by lot and vacuum-dried at 80°C for 6 h to reduce surface moisture below 0.08%. The barrel temperature profile from feed to nozzle is 220°C, 230°C, 240°C, and 245°C, with a mould temperature of 50°C to 70°C maintained by closed-loop water circulation. Injection speed is adjusted so that the flow front speed does not exceed 100 mm/s in the thin sealing lip and collet retention groove areas, preventing jetting and weak knit lines at the collet retention grooves. After a holding pressure of 400–600 bar for 4–6 s, the parts are ejected and conditioned at 23°C and 50% RH for 24 h before leak testing. Performance verification follows ISO 14743 for push-in connectors, including burst pressure at 3× working pressure and vacuum integrity at -0.8 bar. The terminal finished product class is push-to-connect fittings for compressed-air circuits on packaging machines, in nominal tubing diameters of 6 mm, 8 mm, and 10 mm.
In low-pressure chemical transfer hose for solvents and oils, the polyamide 12 liner replaces plasticised PVC where plasticiser migration would otherwise cause liner embrittlement and cracking. The liner is extruded with Grilamid XE 3982 at 100% neat resin in non-conductive constructions; if an antistatic liner is required, a conductive carbon black masterbatch is added at 3.0–5.0 wt% of the liner compound, which raises melt viscosity and requires reducing screw speed by 10–15% to avoid overheating. Extrusion is performed on a smooth-bore single-screw extruder with an L/D of 25:1, barrel temperatures from 215°C to 240°C, and a pin mandrel die that holds wall thickness tolerance at ±0.1 mm. The PA12 liner is then wrapped with a polyester braid and covered with a TPU outer sheath. Chemical resistance is evaluated by immersion testing according to ISO 1817 in ASTM Reference Fuel C at 70°C for 72 h, with a volume change acceptance limit of ≤12%; prolonged contact with concentrated sulfuric acid above 40% or zinc chloride solution is not recommended because of polyamide chain degradation. The finished product is composite chemical transfer hose for tank farms and drumming stations, with a service temperature range of -40°C to 90°C and electrical continuity verified per EN 12115.
| Application scenario | Compliance standard or test method | Addition ratio in formulation | Terminal finished product type |
|---|---|---|---|
| Automotive compressed-air brake tube | SAE J844, ISO 7628-1, ISO 15512 | 100% neat resin; optional 1.0–2.0 wt% carbon black masterbatch | Monolayer air brake tube for tractor-trailer circuits |
| Fuel vapor return line layer | SAE J2260, ASTM D2684 | 100% inner layer; inner layer comprises 60–80% of total wall thickness | Two-layer gasoline fuel vapor return line |
| Industrial cable protection conduit | IEC 61386-22, ISO 527-2, ISO 179-1/1eA | 98–100 wt% resin plus 0.5–2.0 wt% UV masterbatch | Flexible corrugated conduit for CNC machine cables |
| Pneumatic push-to-connect fittings | ISO 14743 | 100% neat resin; regrind ≤10 wt% | Push-in fittings for compressed-air circuits |
| Chemical transfer hose liner | EN 12115, ISO 1817 | 100% neat resin; antistatic liner 3.0–5.0 wt% conductive carbon black masterbatch | Composite chemical transfer hose |
| Subsea hydraulic control umbilical core | ISO 13628-5, ISO 18752, API 17E | 100% neat resin as inner core | Steel-wire reinforced hydraulic control hose |
For subsea hydraulic control umbilical inner cores, dry Grilamid XE 3982 pellets are processed at a maximum melt temperature of 240°C to prevent degradation of the plasticiser system, and the core tube is extruded as 100% neat resin in outer diameters of 4 mm to 12 mm. The extrusion line uses a single-screw extruder with a barrier screw and melt pump, holding die pressure at 100–120 bar, followed by a vacuum tank with 0.5 bar vacuum and laser odometer control. The extruded core undergoes ultrasonic wall thickness verification before braiding with high-tensile steel wire; a polyurethane outer sheath is then pressure-extruded over the wire. Compliance testing for the finished hose or umbilical includes ISO 13628-5 for subsea control umbilical, ISO 18752 for hydraulic hose impulse life, and API 17E for subsea production control system components. Published data for XE 3982 in this specific configuration is limited; long-term seawater ageing at 70°C and 100 bar internal pressure must be qualified per project specification. The terminal product type is steel-wire reinforced hydraulic control hose for subsea wellhead intervention, with design pressure up to 10,000 psi depending on braid configuration.
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EMS-Grivory Grilamid XE 3982 Nylon 12, Dry is a glass-fibre-reinforced polyamide 12 injection-moulding compound with a nominal glass-fibre mass fraction of 50 wt%. The “Dry” designation identifies the conditioning state under which the principal mechanical data are reported, not a separate polymer chemistry. Published dry-as-moulded values for the grade include a density of approximately 1.47 g/cm³ when measured in accordance with ISO 1183-1, a tensile modulus of approximately 13,000 MPa under ISO 527-1/-2, and a tensile stress at break near 135 MPa under the same standard. Notched Charpy impact strength at 23 °C is reported at approximately 15 kJ/m² using ISO 179-1/1eA, and heat deflection temperature under 1.8 MPa loading is approximately 165 °C per ISO 75-2. The material is positioned for dimensionally stable functional parts requiring lower moisture uptake than PA6 or PA66 and better low-temperature impact response than many glass-reinforced semi-crystalline thermoplastics of comparable stiffness.
Polyamide 12 absorbs atmospheric moisture more slowly and to a lower equilibrium level than shorter-chain polyamides, but the dry-condition property set still changes after equilibration at 23 °C and 50 % relative humidity. Residual moisture in the dry-moulding condition is normally held at or below 0.10 wt%, whereas a saturated PA12 matrix can reach 1.0–1.5 wt% moisture uptake depending on filler content and wall thickness. In glass-reinforced grades, the 50 wt% glass phase dilutes the hygroscopic matrix, so the absolute moisture regain is lower than in unfilled PA12. Experienced processors observe that conditioning typically reduces tensile modulus by 10–15 % and increases elongation at break by 1–3 percentage points relative to dry values, although the glass-fibre network limits the large dimensional excursions seen in unreinforced PA12. For engineering tolerance analysis, the dry data set is therefore conservative for stiffness-critical design but not sufficient for long-term creep, fatigue, or impact predictions in humid service. Conditioning according to ISO 1110 and subsequent re-testing under ISO 527-1/-2 should be used when the part operates continuously above 60 % relative humidity.
Before melt processing, the granulate is dried in a desiccant-bed or dehumidifying hopper dryer at 80 °C for 4–8 h to maintain a residual moisture level not exceeding 0.10 wt%. Drying air with a dew point of -30 °C or lower is specified to prevent moisture regain during long hopper residence. On all-electric injection moulding machines with screw diameters from 25 mm to 60 mm and L/D 20, a melt temperature window of 230–270 °C is typical, with nozzle settings at the upper end of that range. Mould temperatures between 40 °C and 80 °C are used to balance fibre wet-out, surface finish, and crystallisation rate. Hold pressures of 60–80 MPa hydraulic-equivalent and back pressures of 5–10 MPa are common for maintaining fibre-length retention and avoiding gas entrapment. Screw speeds are normally limited to 80–150 min⁻¹ to reduce glass-fibre attrition. The recommended shot volume is 30–70 % of barrel capacity, and melt residence time above 280 °C should be kept below 5 min to limit thermo-oxidative degradation of the PA12 matrix. Moulding shrinkage in the flow direction is typically 0.1–0.3 %, while transverse shrinkage can reach 0.4–0.6 % because of anisotropic glass orientation; prototype tool design should therefore use asymmetric shrinkage allowances and validated gate placement.
The dry-state values of Grilamid XE 3982 are most useful when read against 50 wt% glass-fibre grades of PA66, PA6, and PBT. The following comparison is assembled from published supplier datasheet ranges for glass-reinforced injection-moulding grades and is intended for first-pass material screening rather than final part qualification.
| Property | EMS-Grivory Grilamid XE 3982 dry | PA66 50 % GF dry | PA6 50 % GF dry | PBT 50 % GF dry |
|---|---|---|---|---|
| Density, ISO 1183-1 (g/cm³) | 1.47 | 1.56 | 1.55 | 1.73 |
| Tensile modulus, ISO 527-1/-2 (MPa) | 13,000 | 16,000 | 15,000 | 15,000 |
| Tensile stress at break, ISO 527-1/-2 (MPa) | 135 | 220 | 200 | 130 |
| Notched Charpy impact, 23 °C, ISO 179-1/1eA (kJ/m²) | 15 | 12 | 14 | 9 |
| Heat deflection temperature, 1.8 MPa, ISO 75-2 (°C) | 165 | 250 | 200 | 205 |
| Water absorption, 24 h, ISO 62 (wt%) | 0.15 | 0.80 | 1.60 | 0.10 |
The PA12-based grade shows a measurable density advantage over PA66, PA6, and PBT. Its short-term dry strength is lower than that of glass-reinforced PA66 and PA6, but the notched impact response is comparable or better than the shorter-chain polyamides, particularly when parts must survive low-temperature assembly or service. The heat deflection temperature under load is below that of 50 wt% glass-filled PA66, which limits the material in under-hood components exposed to continuous temperatures above 150 °C. Against PBT, the PA12 grade offers higher notched impact strength and a less brittle failure mode, although PBT retains superior inherent hydrolytic stability and lower moisture uptake.
Melt rheology and fibre-length retention are decisive in maintaining the published mechanical envelope. The melt volume-flow rate of the grade is typically in the 15–25 cm³/10 min range when tested at 275 °C under 5 kg load according to ISO 1133-1. During plastication, the average glass-fibre length decreases as a function of screw speed, back pressure, and residence time. Production experience on a 40 mm three-zone screw at L/D 20 shows that fibre length can fall below 300 µm after extended residence times, reducing tensile modulus and notched impact strength despite acceptable mould fill. A low-compression screw with a compression ratio of 1.8–2.2:1 and a non-return valve with 0.5–1.0 mm radial clearance is specified to limit fibre damage. Gate design should avoid free-jet injection because exposed glass bundles create brittle weld lines and surface streaks. When moulding complex geometries with multiple gates, melt fronts should meet at a contained flow-front angle of ≥45° to reduce knit-line weakness.
Polyamide 12 retains better sub-zero toughness than many glass-reinforced PA66 and PBT compounds because the PA12 matrix has a comparatively low glass transition temperature and residual ductility below 0 °C. The grade’s published notched Charpy impact at -30 °C is approximately 12 kJ/m² under ISO 179-1/1eA, which is relevant for fasteners, brackets, and housings exposed to cold-climate assembly. In moulded parts, this low-temperature performance is sensitive to wall thickness, gate size, and fibre orientation. Mould trials on cold-runner tools have shown that gates below 1.0 mm in diameter can produce jetting and reduce impact strength at the knit line by 20–30 % relative to a fully developed flow front. Minimum wall thickness should therefore be maintained above 2.0 mm in impact-loaded regions, and the ratio of rib thickness to nominal wall should not exceed 50 % to avoid sink marks and internal voids. Weld lines should be relocated away from high-tensile-stress surfaces and pressure boundaries, particularly when the part is used for fuel-system connectors or pneumatic manifolds.
Chemical resistance of glass-reinforced PA12 is governed by the aliphatic hydrocarbon matrix and the exposure condition of the glass-fibre phase. The polymer exhibits low swelling in aliphatic hydrocarbon media, lubricating oils, and many automotive fluids, making the grade suitable for pump flanges, sensor housings, fuel-system brackets, and cable management components. In media contact applications, testing should follow ISO 175 and ISO 22088 as appropriate for the specific fluid, temperature, and stress state. One limitation is that exposed glass fibres at the moulded surface can provide a wicking path in prolonged hot-water or aggressive glycol service; hydrolytic degradation tests on finished parts are therefore required before use in pressurised coolant environments. Where the application requires sustained contact with automotive fuel blends containing methanol or aggressive peroxides, grade-specific fuel resistance data should be confirmed with the supplier. Published data for this specific configuration in long-term fuel immersion at elevated pressure is limited outside the supplier’s internal application testing.
Regulatory declarations for RoHS 2011/65/EU and REACH SVHC compliance should be requested for the specific lot because downstream colourants, stabilisers, and processing aids vary by product form. Food-contact and medical applications require final-part testing under FDA 21 CFR 177.1500, EU 10/2011, or ISO 10993-1 depending on the intended use; dry-as-moulded resin compliance does not by itself establish migration, extractables, or biocompatibility performance in a finished device. The grade is not a flame-retardant formulation. A conventional glass-filled PA12 of this type typically receives a UL 94 classification of HB at thicknesses above 1.5 mm, but the final classification is colour-, thickness-, and tool-surface-dependent and must be verified on the production part. Traceability requirements for automotive or medical series production should define the supplier’s lot-level certificate of analysis, the drying log, and the moulding machine process signature in the same control plan.
