| HS Code | 851540 |
| Density Conditioned | 1.02 g/cm³ |
| Water Absorption At Saturation | 0.8 % |
| Tensile Strength At Break Conditioned | 35 MPa |
| Elongation At Break Conditioned | 200 % |
| Tensile Modulus Conditioned | 480 MPa |
| Flexural Modulus Conditioned | 450 MPa |
| Charpy Impact Strength Notched 23 C Conditioned | No break |
| Shore D Hardness Conditioned | 60 |
| Melting Point | 155 °C |
| Heat Deflection Temperature At 0 45 Mpa Conditioned | 45 °C |
As an accredited EMS-Grivory Grilamid L 22A W 40X Nylon 12, Conditioned factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in sealed, moisture-resistant 25 kg bags, conditioned to maintain optimal dryness for consistent nylon 12 processing. |
| Container Loading (20′ FCL) | 20′ FCL: 25 kg bags on pallets, shrink-wrapped, securely loaded for safe transport of Grilamid L 22A W 40X Nylon 12. |
| Shipping | This conditioned nylon 12 resin ships in sealed, moisture-proof bags or drums to preserve its properties. Standard ground freight is available; avoid water exposure and store dry. Ensure proper labeling for non-hazardous polymer granules. Adequate packaging prevents contamination during transit, with delivery typically within 5-7 business days. |
| Storage | Store Grilamid L 22A W 40X Nylon 12 in its original sealed container in a cool, dry, well-ventilated area. Keep away from direct sunlight, heat, and ignition sources. Tightly close containers after use to prevent moisture absorption, which can alter properties. Avoid contact with strong acids and oxidizing agents. |
| Shelf Life | Shelf life is indefinite when stored in original sealed packaging, protected from moisture, heat, and direct UV light. |
In coiled SAE J844 air brake tube production, the conditioned PA12 compound is fed from sealed foil-lined octabins directly into a single-screw extruder with a 30:1 L/D barrier screw and a 2.5:1 compression ratio. Regrind from start-up scrap and cut ends is reintroduced at ≤20 wt%; when coloured identification stripes are coextruded, a PA12-carrier colour masterbatch is metered at 2.0–4.0 wt%, and additions above 4.0 wt% trigger repeated first-article burst testing under SAE J844 conditions after environmental cycling at -40°C. Compliance is evaluated against SAE J844 for nonmetallic air brake tubing, ISO 7628-1:2015 for dimensions and marking, and SAE J2260 where fuel vapour contact is involved; emission and permeation limits are confirmed by evaporative loss testing specified in the applicable OEM material standard. Production experience shows that melt-pressure fluctuation exceeding ±10 bar at the screw tip generates wall-thickness variation of 0.05 mm or more, producing fitting-barb leakage after thermal cycling. Desiccant-wheel drying is run at 80°C with a dew point of -40°C for 4–6 h, achieving residual moisture of ≤0.08% by mass via ISO 15512:2019; the barrel profile is set at 220/235/245/245/240°C, melt temperature at 245 ±5°C, and die temperature at 235°C. Vacuum sizing operates at -0.6 to -0.8 bar with cooling water at 18–22°C, while line speeds between 30 and 60 m/min are adjusted to outside diameter. Terminal products include coiled air brake tube assemblies, fuel vapour return lines, diesel vent lines, and selective catalytic reduction urea feed conduits where low-temperature impact retention is part of the OEM acceptance protocol.
| Extrusion setpoint | Target | Reference method |
|---|---|---|
| Hopper dryer temperature | 80°C | Desiccant-wheel dryer |
| Residual moisture | ≤0.08% by mass | ISO 15512:2019 |
| Melt temperature | 245 ±5°C | Infrared melt probe |
| Vacuum sizer pressure | -0.6 to -0.8 bar | In-line pressure transducer |
| Regrind addition | ≤20 wt% | Closed-loop granulate handling |
Where plant-wide pneumatic tube bundles are installed in washdown zones, selection of PA12 is driven less by tensile strength than by ovality after repeated push-in disconnection cycles; the conditioned grade is qualified only when tube outside diameter remains within ±0.05 mm after 100 cycles under ISO 14743:2020 assembly and disassembly test conditions. Baseline formulation uses 100 wt% conditioned resin; a silicone-based processing lubricant masterbatch in PA12 carrier may be metered at 0.3–0.8 wt% only when insertion force into push-in fittings exceeds the upper control limit of 45 N, because higher lubricant loadings migrate to the tube surface and reduce fitting retention after temperature cycling. Regrind from edge trim and start-up material is limited to ≤15 wt%, and in-line fines removal prevents screw surging that otherwise manifests as periodical variation in wall thickness at the laser micrometer. Extrusion is performed on a single-screw extruder with 25:1 L/D, melt pump, and die temperature of 230 ±5°C; the tube passes through a vacuum sizer and a dual-axis laser gauge sampling at 500 Hz, then enters a climate chamber at 23°C and 50% RH for 48 h to reach moisture equilibrium before final cut length. Terminal products include pneumatic control lines for packaging machinery, robotics gripper air feed lines, compressed-air distribution tubing, and chemical dosing lines in water treatment plants.
Because ethylene oxide sterilisation imposes a humidity spike of 70–80% RH during preconditioning, catheter shaft polymers that shift length by more than 1.2% after moisture equilibration are rejected in device design verification; the conditioned PA12 is therefore processed only after its post-sterilisation dimensional change has been characterised under the actual EtO cycle parameters. Biological safety is assessed under ISO 10993-1:2018 endpoints, cytotoxicity under ISO 10993-5:2009, and material suitability under USP Class VI test protocols. Radiopaque barium sulfate filler is dry-blended at 20–30 wt% only when fluoroscopic visibility is required; below 20 wt% radiopacity is insufficient for reliable digital subtraction imaging, while above 30 wt% elongation loss compromises tip forming and increases the risk of shaft fracture during steering. A microextruder with a 20 mm barrier screw and 24:1 L/D is used with a melt pump to reduce pressure ripple to ±0.5 MPa; the die gap is set at 0.15 mm, vacuum sizing removes collapse, and a laser OD gauge samples at 2 kHz for closed-loop diameter control. Conditioning is carried out at 23°C and 50% RH for 24 h prior to secondary operations such as overmoulding or bonding. Terminal products include angioplasty balloon outer shafts, intravascular delivery system shafts, infusion pump segments, and fluid management tubing where a combination of burst strength and flexibility is required.
In thin-wall sensor harnesses routed across battery module compression plates, jacket compounds must resist cut-through from stamped aluminium edges without generating halogen acid gases or dense smoke; the conditioned PA12 is therefore processed as a pressure-extruded jacket over cross-linked polyethylene or fluoropolymer primary insulation. The application is evaluated under ISO 6722-1:2011 for automotive cable construction and thermal class, IEC 60332-1-2 for vertical flame propagation, RoHS 2011/65/EU for restricted substances, and REACH Article 33 communication data for SVHC content. Non-halogen flame retardant masterbatch is metered at 10–18 wt%; below 10 wt% vertical flame propagation after a 5 s flame application is not controlled under IEC 60332-1-2, while above 18 wt% low-temperature flexural cracking appears at -40°C during cable cold-bend testing. An anti-abrasion masterbatch is added at 1–2 wt% when scrape resistance against stamped-sheet edges is specified. Pressure extrusion uses a crosshead with 90° tooling and barrel zones at 210/225/235/235°C, with melt temperature maintained at 240 ±5°C; the jacketed wire enters a cooling trough at 25°C, passes through an air wipe, and is spark-tested at 15 kV before spoiling. Terminal products include battery module voltage sense harnesses, motor temperature sensor cables, fuel cell bus cabling, and high-voltage interlock loop wiring routed through dry or shielded areas.
Large-diameter extrusion of PA12 pressure sheaths for unbonded flexible risers is a low-speed, high-residence-time operation where gel formation and pinhole density determine qualification; the conditioned grade is evaluated against API Spec 17J and ISO 13628-2:2006 requirements for permeation and pressure containment after simulated service ageing. The formulation is 100 wt% conditioned high-viscosity PA12, and no regrind is used in first-line qualification; a processing lubricant may be added at ≤0.2 wt% only when extrusion amperage exceeds the extruder drive limit, and any such change triggers re-qualification because published data for this specific configuration is limited. Melt processing is carried out on an extruder with 45:1 L/D, grooved feed section, and melt pump; residual moisture is held at ≤0.06% by mass via ISO 15512:2019, melt temperature is maintained at 235–240°C, and circumference ultrasonic thickness gauging continuously records wall-thickness deviation. Failure experience on production-scale equipment shows that resin residence time above 12 min at melt temperature produces gel specks that later become pinholes under ultrasonic inspection; screw design and speed are therefore matched to extruder output to keep residence time below that threshold. Post-extrusion annealing is carried out at 120°C for 4 h under nitrogen to reduce residual stress before pressure testing. Terminal products include unbonded flexible riser pressure sheaths, subsea flowline liners, and high-pressure gas transfer pipe for offshore hydrocarbon service.
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EMS-Grivory Grilamid L 22 A W 40X Nylon 12, Conditioned is a heat-stabilized injection-molding compound based on PA12 with a nominal 40 wt-% glass fiber reinforcement. The conditioned designation indicates that mechanical and electrical values are reported after conditioning at 23 °C and 50 % relative humidity according to ISO 291, not simply as-received moisture content. Under these conditions, the polyamide matrix absorbs a controlled amount of water, plasticizing the amorphous phase and reducing tensile modulus and tensile strength while increasing notched impact toughness. The product belongs to the Grilamid L PA12 series, in which the glass fiber raises stiffness and heat deflection temperature above unfilled PA12 while retaining lower water uptake, lower density, and low-temperature toughness relative to PA6 and PA66 compounds.
Moisture uptake in PA12 is lower than in PA6 or PA66 because the C12 alkyl segment reduces amide group concentration. At 23 °C and 50 % RH, the absorbed water content of a 40 wt-% glass-fiber-reinforced PA12 is typically below 0.5 wt-% of compound mass, while water saturation at 23 °C under ISO 62 may reach 1.0–1.2 wt-%. Conditioned data therefore represent equilibrium with indoor air rather than full water saturation. Absorbed water plasticizes the amorphous PA12 phase, lowering the glass transition and reducing short-term creep resistance, while the glass fibers constrain dimensional change. In thick sections a moisture gradient may remain, so conditioned values should not be applied to continuous immersion service without verification.
Typical comparative values for dry and conditioned states are listed in Table 1. The dry state corresponds to as-molded material dried to 0.10 wt-% residual moisture or lower; the conditioned state corresponds to 23 °C and 50 % RH. These are typical supplier data and should not be treated as part-specific minimum values.
| Property | Standard | Unit | Dry | Conditioned |
|---|---|---|---|---|
| Density | ISO 1183 | g/cm³ | 1.42 | 1.42 |
| Water absorption at saturation | ISO 62 | % | 1.1 | 1.1 |
| Tensile modulus | ISO 527-1/2 | MPa | 12,400 | 9,000 |
| Tensile stress at break | ISO 527-1/2 | MPa | 148 | 112 |
| Elongation at break | ISO 527-1/2 | % | 3.2 | 4.8 |
| Flexural modulus | ISO 178 | MPa | 11,500 | 8,200 |
| Flexural strength | ISO 178 | MPa | 215 | 155 |
| Charpy notched impact, 23 °C | ISO 179/1eA | kJ/m² | 17 | 23 |
| Charpy notched impact, -30 °C | ISO 179/1eA | kJ/m² | 14 | 15 |
| Heat deflection temperature A, 1.80 MPa | ISO 75-1/2 | °C | 166 | 166 |
| Melting temperature | ISO 11357-1/3 | °C | 176 | 176 |
The tensile modulus reduction from dry to conditioned is approximately 27 %, and tensile strength at break drops approximately 24 %. Notched Charpy impact at 23 °C increases by roughly 35 % in the conditioned state. The shift is consistent with water acting as a matrix plasticizer, reducing load-bearing capacity while improving crack-initiation energy. For load-bearing applications, short-term tensile data are insufficient. Creep testing according to ISO 899-1 is required because the conditioned PA12 matrix exhibits greater time-dependent strain than the dry state. The glass reinforcement reduces creep magnitude relative to unfilled PA12, but design stress should be derived from isochronous stress-strain curves at the actual service temperature and humidity.
Unfilled PA12 in the dry state exhibits a tensile modulus near 1,400–1,600 MPa and elongation at break commonly above 50 %. At 40 wt-% glass fiber, dry tensile modulus rises to approximately 12,000–12,500 MPa, an increase of 7–9 fold, while elongation at break falls to 3–5 %. The dominant failure mechanism changes from ductile yielding and neck propagation to fiber-matrix debonding and fiber pull-out, reducing pre-fracture energy absorption. Heat deflection temperature under 1.80 MPa increases from approximately 50 °C for unfilled PA12 to 165–170 °C for the reinforced grade. In the conditioned state, the matrix becomes more ductile, and the reinforced compound can show higher notched impact energy than in the dry state while retaining tensile modulus above 8,500 MPa. This combination is used in rigid clips, connectors, and housings that require low-temperature impact and dimensional stiffness.
Injection molding should be performed on a reciprocating-screw machine with a 20:1 to 24:1 L/D screw. Pre-drying in a desiccant dryer at 80 °C for 4–8 h to a residual moisture content below 0.10 wt-% is required; processing above approximately 0.15 wt-% moisture may generate splay, bubble formation, and reduced weld-line strength. Residual moisture is typically verified by ISO 15512 or Karl Fischer titration. Melt temperature should be controlled within 230–260 °C, and residence time outside this range should be minimized because sustained temperatures above 260 °C can cause thermal degradation. Mold temperature should be maintained between 60 °C and 90 °C to promote crystallization and surface replication. Mold shrinkage is anisotropic because of glass-fiber orientation: flow-direction shrinkage is approximately 0.2–0.5 %, transverse shrinkage 0.4–0.8 %. Post-molding moisture uptake can increase dimensions slightly, especially in sections above 3 mm.
Glass fiber makes the melt abrasive. Screw, barrel, and check ring wear rates are higher than with unfilled PA12; bimetallic barrels and screws hardened above 55 HRC are specified to reduce maintenance. Fiber attrition during plasticating should be monitored because high-compression screws or narrow hot-runner gates can reduce average fiber length below 150 µm, lowering tensile strength and notched impact. Low-compression screws of 1.8:1 to 2.2:1, positive shut-off nozzles, and balanced hot-runner manifolds without dead zones are used to limit shear damage.
Moisture-induced linear expansion in a 40 wt-% glass-reinforced PA12 is typically on the order of 0.06–0.10 % per 1 wt-% water uptake, with glass fibers restricting expansion in the orientation direction. The dry PA12 glass transition is approximately 40–50 °C; conditioning lowers it, which can reduce short-term creep resistance at elevated indoor temperatures. Electrical properties are moisture-dependent: surface resistivity decreases and dielectric constant increases when the material is conditioned. Volume resistivity measured dry under IEC 60093 is typically in the range of 10^14 Ω·cm; after conditioning, values may be lower by one to two orders of magnitude. Dielectric strength under IEC 60243-1 is commonly reported near 35–40 kV/mm for thin specimens, but moisture and glass-fiber orientation can reduce actual part withstand voltage. Electrical clearance and creepage distances should therefore be validated on conditioned moldings, not only on resin datasheet values. The comparative tracking index is typically reported at 600 V under IEC 60112; however, pigmented or externally lubricated variants may show different values.
Supplier technical literature for PA12-GF40 compounds identifies candidate applications in automotive fluid-line clips, pneumatic connectors, cable glands, appliance structural brackets, and sports equipment housings. The material is selected for lower water absorption relative to PA6 or PA66 and retention of notched impact below 0 °C. Because PA12 resists greases, oils, and aliphatic solvents, engine-compartment components are candidates; however, aromatic solvents and strong polar solvents can cause swelling or stress cracking. Continuous exposure to hot aqueous glycol, strong mineral acids, or oxidizing media can attack the PA12 matrix; compatibility testing under ISO 22088-3 or an application-specific immersion test is required. Grades for potable water, food-contact, or medical use must be validated for the specific colorant and regrind content under EU Regulation No 10/2011, FDA 21 CFR 177.1500, NSF/ANSI 51, or applicable regional standards.
PA12-GF40 is selected over PA6-GF40 and PA66-GF40 when lower equilibrium water absorption, lower density, or low-temperature impact is prioritized. Under ISO 62 saturation at 23 °C, unreinforced PA6 absorbs roughly 9–10 wt-%, PA66 7–8 wt-%, and PA12 1.5–2.0 wt-%; glass fiber reduces these values by replacing polymer volume, but the ranking remains. The density of PA12-GF40 is about 1.42 g/cm³, compared with 1.55–1.60 g/cm³ for PA66-GF40. Dry PA66-GF40 can provide HDT/A near 250 °C, while PA12-GF40 remains near 165–170 °C, so PA12-GF40 is not selected for continuous service above 150 °C. Conditioned tensile modulus of PA66-GF40 may exceed 10,000 MPa, whereas PA12-GF40 conditioned values are near 9,000 MPa. The PA12 grade provides lower moisture-induced dimensional change and resistance to aliphatic hydrocarbons and zinc chloride.
Processing boundaries are critical when wall thickness falls below 1.0 mm; the glass fiber content raises melt viscosity and may require higher injection pressure, but melt temperature must remain at or below 260 °C to avoid degradation. Regrind addition should be limited to 25 wt-% in non-critical parts unless conditioned notched impact and tensile values are re-verified. The heat stabilizer and glass reinforcement may exclude the compound from certain direct food-contact listings even when the base PA12 resin is permitted. For outdoor use, UV-stabilized or pigmented variants are typically necessary because the base PA12 can yellow and embrittle under prolonged UV exposure. Published long-term creep data for hot, humid load-bearing conditions are limited; application approval should include thermal aging and creep testing at the actual service temperature and moisture level.
