| HS Code | 600958 |
| Specific Gravity | 1.13 |
| Water Absorption 24 Hrs 73f | 0.25% |
| Tensile Strength Astm D638 | 10,500 psi |
| Tensile Modulus Astm D638 | 700,000 psi |
| Elongation At Break Astm D638 | 1.5% |
| Flexural Strength Astm D790 | 16,000 psi |
| Flexural Modulus Astm D790 | 650,000 psi |
| Izod Impact Notched 1 8 In Astm D256 | 0.8 ft-lb/in |
| Deflection Temperature 264 Psi Astm D648 | 290 F |
| Deflection Temperature 66 Psi Astm D648 | 330 F |
| Volume Resistivity Astm D257 | 1000 ohm-cm |
| Surface Resistivity Astm D257 | 1000 ohm/sq |
As an accredited RTP Company ESD C 202 F Nylon 12 (PA), 15% Glass Fiber - Electrically Conductive factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in sealed 25 kg moisture-barrier bags to prevent moisture pickup and preserve conductivity of this glass-filled, conductive Nylon 12. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with RTP ESD C 202 F Nylon 12 pellets, palletized and secured, protected from moisture and damage. |
| Shipping | RTP Company ESD C 202 F ships as a non-hazardous thermoplastic pellet. Packaged in moisture-resistant, anti-static bags to preserve properties. Store dry and avoid static discharge. Standard ground freight is typical; no special hazmat endorsement required. Keep away from sparks and extreme heat during transit and handling. |
| Storage | Store in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep the original sealed container tightly closed to prevent moisture absorption, which can degrade nylon’s properties. Avoid exposure to excessive humidity or extreme temperatures. Handle with clean, dry equipment to preserve the conductive performance and material integrity. |
| Shelf Life | Store dry, sealed, and away from heat/moisture. Shelf life is generally one year from shipment date if unopened. |
In positive-sealing evaporative emission circuits where SAE J1645-2021 governs electrostatic charge mitigation at fuel vapor impingement points, RTP ESD C 202 F is converted as a fully compounded pellet at 100 wt% feed with a regrind ceiling of 20 wt% because higher recycled fractions interrupt the conductive filler network along knit lines and produce isolated high-resistance regions in multi-gate tools. The compliance chain for fuel-contact PA12 components also includes tensile and weld-line evaluation on conditioned specimens per ISO 527-2:2012, liquid-exposure dimensional change per ISO 1817:2022, and OEM-specific purge-cycle exposure tests that simulate repeated fuel vapor adsorption and desorption. Downstream processing on horizontal injection molding machines in the 800 kN–1600 kN clamp force range requires desiccant drying at 80 °C for 2 h–4 h to a moisture content of ≤0.10%; if bulk storage has exceeded 60% RH, the drying time is extended toward the upper limit. Barrel temperatures are maintained between 240 °C and 260 °C, nozzle temperature at 250 °C, and mold temperature between 60 °C and 80 °C to balance conductive filler orientation against dimensional repeatability. Gates are placed away from fuel-contact surfaces to prevent gate blush from becoming a preferential vapor-permeation site, and hot-tip runners are used to minimize cold-slug formation in thin-walled clip geometries. Terminal parts produced under this regime include fuel tank port fittings, evaporative emission canister mounting brackets, fuel filler neck grounding clips, ORVR pipe retaining clips, and fuel pump module flanges. Continuous liquid fuel immersion data for this specific conductive glass-filled PA12 formulation are limited, so any replacement of a metallic sealing component requires engine-test validation under the vehicle manufacturer’s fuel-assembly test protocol rather than extrapolation from generic PA12 permeation rates.
At the EPA production line where printed circuit board carriers, JEDEC matrix trays, and rail-mounted transport nests enter automated optical inspection stations, the electrostatic discharge control framework is defined by ANS/ESD S20.20-2021 for facility-wide process control and IEC 61340-5-1:2016 for protection of electrical and electronic devices from electrostatic phenomena. Surface resistance of molded carrier surfaces is measured per ANSI/ESD STM11.11-2021 using a two-point probe at 100 V DC after conditioning at 12% RH and 23 °C, while volume resistivity is evaluated per ASTM D257-14 on a 3.2 mm injection-molded plaque. The formulation addition ratio is 100 wt% as-supplied compound; dry blending with unfilled PA12 above 15 wt% is rejected because it reduces the conductive additive population density below the threshold needed for consistent surface resistance in ribbed regions. If in-house regrind is used, the addition is limited to 20 wt% and must be passed through a desiccant hopper because re-dried conductive PA12 can absorb moisture quickly in uncontrolled ambient air. Production-scale molding of pocketed trays is performed on electric injection molding machines with screw diameters of 30 mm–40 mm, melt temperature from 245 °C to 255 °C, mold temperature from 70 °C to 85 °C, and holding pressure between 60 MPa and 80 MPa. Sequential valve gating is necessary on multi-cavity tray tools because confluent weld fronts at the bottom of deep pockets can create nonconductive seams that escape visual inspection but fail resistance mapping. Mold steel hardness of 50 HRC or greater is specified for high-run tools to limit glass-fiber abrasion on gates and ejector sleeves. Terminal product types include PCB assembly trays, component carrier rails, waffle trays for ball-grid-array parts, and ESD-safe workbench positioning nests. The material is not recommended for solder reflow pallets or other continuous operating environments above its PA12 heat-deflection range, and published data on outgassing behavior of this specific ESD PA12 formulation in cleanroom vacuum applications are limited.
| Verification parameter | Standard method | Conditioning and configuration | Operational relevance |
|---|---|---|---|
| Surface resistance | ANSI/ESD STM11.11-2021 | Two-point probe, 100 V DC, 12% RH, 23 °C | Confirms molded surface bleeds charge within EPA limits |
| Resistance to ground | IEC 61340-5-1:2016 | Surface electrode to grounded fixture | Verifies discharge path through tray contact points |
| Volume resistivity | ASTM D257-14 | 3.2 mm plaque, concentric ring electrodes | Detects bulk conductivity shifts after molding |
For dilute-phase pneumatic transfer of insulating powders and granular resins where charge accumulation at flow velocities above 20 m/s causes particle agglomeration and occasional dust-cloud ignition, electrically conductive glass-filled PA12 is converted at 100 wt% pellet feed into extruded rectangular bar stock and CNC-machined wear components. The relevant electrostatic hazard guidance is IEC TS 60079-32-1:2020 for process-generated static electricity, while non-electrical equipment in potentially explosive atmospheres is assessed under ISO 80079-36:2016. Surface resistance is re-verified after machining per ASTM D257-14 because cutting removes the conductive skin layer and may expose high-resistance subsurface zones in thick sections. The extrusion process uses a single-screw extruder with L/D 25:1–30:1, barrel temperatures from 200 °C to 230 °C, and a die temperature of 220 °C; pressure calibration is preferred over vacuum sizing because aggressive surface cooling can freeze the skin before the conductive filler network reaches full packing density. Terminal product types include rotary valve rotor tips from 60 mm to 200 mm diameter, adjustable hopper wear plates, chain guide rails, and transfer chute liners in thicknesses from 8 mm to 25 mm. The glass fiber content introduces an operational boundary in abrasive alumina or quartz-filled powder lines; wear data for this specific ESD PA12 grade in such high-hardness service are not covered by the supplier’s standard datasheet and must be obtained through pilot conveying trials.
In an IECEx Zone 22 enclosure located where combustible dust clouds are normally absent but dust layers can form, external non-metallic covers molded from RTP ESD C 202 F are evaluated under the equipment protection concepts of IEC 60079-0:2017 and the non-electrical ignition hazard requirements of ISO 80079-36:2016. The regulatory pathway is the ATEX Directive 2014/34/EU for products placed on the European market, with technical documentation addressing electrostatic charge accumulation on accessible surfaces. The material is processed at 100 wt% without a secondary flame-retardant masterbatch unless the specific FR package has been pre-qualified with the conductive filler system; brominated additive packages can deposit on the filler surface during plastication and generate batch-to-batch surface resistance variation. Large flat covers are injection-compression molded with sequential valve gating to counteract anisotropic glass-fiber shrinkage, with melt temperature held at 255 °C–265 °C, mold temperature at 80 °C–90 °C, and post-mold annealing at 120 °C for 2 h under nitrogen to stabilize snap-fit dimensions. A documented production failure mode with this part family is warpage across a 300 mm cover span when cavity filling is too slow, so holding pressure and gate-freeze time are tied to cavity-pressure sensors rather than timer-based transfer. Terminal product types include inspection hatch covers, junction box lids, non-metallic enclosure windows, and sensor mounting plates. This compound is not a substitute for UL 94-certified flame-retardant enclosure resins unless the final enclosure assembly passes the relevant end-product ignition testing; published data for this specific formulation in Zone 0 or Zone 1 gas atmospheres are insufficient and such use should not proceed without additional material qualification.
Because semiconductor and printed circuit assembly robots operate at end-effector speeds above 2 m/s, triboelectric charging on vacuum gripper plates and alignment fingers must remain below the device damage threshold established by the facility EPA under ANS/ESD S20.20-2021. RTP ESD C 202 F is fed at 100 wt% as supplied; regrind is limited to 20 wt% and must be dried to ≤0.10% moisture because re-exposed pellet surfaces absorb moisture quickly and can cause splay in thin-wall gripper features. Injection molding is performed with a melt temperature of 245 °C–255 °C, mold temperature of 70 °C–80 °C, and conformal cooling channels in the cavity block for flatness control on vacuum surfaces. Mechanical design of the robot end-effector follows ISO 10218-1:2011, while surface resistance verification is performed per ANSI/ESD STM11.11-2021 on the finished part. Terminal products include ESD-safe vacuum gripper plates, pick-and-place fingers, tooling nests, and modular end-of-arm supports.
Dry-room assembly of prismatic cells involves robotic handling of cell mounting brackets and busbar positioning fixtures where uncontrolled static charge can disrupt voltage sensing and create potential differences across cell terminals. RTP ESD C 202 F is injection molded at 100 wt% as a pre-compounded pellet; dilution with neat PA12 above 10 wt% is prohibited because it shifts surface resistance above the ESD range and can leave isolated insulating zones at bracket ribs. Compliance on the assembly floor is governed by ANS/ESD S20.20-2021 and IEC 61340-5-1:2016, while the non-current-carrying bracket itself must not compromise creepage and clearance distances established under ISO 6469-1:2019 for electrically propelled road vehicles. Low-shear injection molding is specified with a screw compression ratio of 2.0:1, melt temperature between 250 °C and 260 °C, mold temperature at 80 °C, and desiccant drying at 80 °C for 2 h–4 h to ≤0.10% moisture. Terminal product types include battery module side brackets, cell retaining rails, busbar positioning fixtures, and BMS board mounting clips. Published data on carbonate electrolyte immersion for this specific conductive PA12 grade are limited, so battery pack developers should perform electrolyte-mist exposure testing before replacing incumbent metallic brackets in sealed modules.
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RTP Company ESD C 202 F Nylon 12 (PA), 15% Glass Fiber - Electrically Conductive is a static-dissipative injection molding compound based on polyamide 12 with a 15 wt% glass fiber reinforcement and a conductive carbon additive system. The designation places the material in the RTP ESD C series, where charge dissipation is generated by a dispersed conductive carbon network rather than a surface coating or metal fiber. The PA12 carrier provides lower equilibrium moisture uptake than PA6 or PA66 and is specified for dimensionally stable parts in hydrocarbon-contact and low-temperature environments. The 15% glass fiber loading raises flexural modulus and creep resistance while retaining sufficient elongation for snap-fit and threaded-insert assembly of small electronic, fuel-system, and industrial components.
The electrical function is governed by percolation of the conductive carbon phase. Because the glass fibers are electrically insulating, the conductive network must form around the fibers, making processing history a direct variable in final resistivity. Surface resistivity for this class is normally specified in the static-dissipative band between 105 Ω/sq and 109 Ω/sq under ASTM D257, while volume resistivity is often two to three decades lower in Ω·cm. Published data for this specific configuration is limited to supplier lot-characterization values and should not be applied to molded parts without prototype validation. Charge decay measured under IEC 61340-5-1 is a more reliable predictor of factory-floor electrostatic discharge behavior than surface resistivity alone, particularly in low-humidity assembly areas.
Carbon-fiber-filled conductive grades derive stiffness and conductivity from the same fiber population. Those materials can reach surface resistivity values below 104 Ω/sq, but conductivity is anisotropic and machined edges may expose insulating resin-rich regions. ESD C 202 F instead uses glass fiber for mechanical reinforcement and a carbon particulate network for conductivity. The electrical pathway is therefore less dependent on conductive fiber length and more sensitive to local filler concentration, cooling history, and weld-line position. Compared with stainless-steel-fiber-filled PA6, ESD C 202 F offers lower density and better resistance to aliphatic hydrocarbon absorption but not the same shielding effectiveness. Stainless-steel-fiber grades may reach 101 Ω/sq or lower and are used where EMI shielding rather than static dissipation is the requirement. Compared with unfilled conductive PA12, the 15% glass fiber package raises modulus and reduces creep, but the conductive network in thin sections below 1.2 mm may require higher melt temperature or faster injection to prevent premature freeze-off from increasing resistivity.
Compounding is conducted on a co-rotating twin-screw extruder with a 40:1 L/D barrel, using downstream feeding of glass fiber after the polymer melt section to limit fiber attrition. The conductive carbon concentrate is introduced in the first barrel section, and a distributive mixing section at 60–70% of barrel length homogenizes the filler system without excessive shear. Batches compounded at screw speeds above 400 rpm can elevate melt temperature at the die and reduce resistivity consistency by fracturing conductive carbon agglomerates. On the injection molding side, surface resistivity variation of one to two decades has been observed across multi-cavity tools when fill time and gate shear are not controlled.
| Parameter | Typical range | Equipment basis |
|---|---|---|
| Drying temperature / time | 80 °C / 4–6 h | Desiccant-bed dryer, dew point ≤ -40 °C |
| Melt temperature | 240–270 °C | Nozzle / barrel set points |
| Mold temperature | 60–90 °C | Turbulent water cooling circuits |
| Back pressure | 0.3–0.7 MPa | Hydraulic injection unit |
| Screw speed | 50–100 rpm | 24:1 L/D general-purpose screw |
| Hot-runner residence time | < 8 min | Internally heated manifold |
Rheological response is strongly non-Newtonian. At the lower melt temperature of 240 °C, apparent viscosity at 1000 s-1 is significantly higher than at 270 °C; capillary rheometry should establish injection pressure rather than melt flow rate alone. Melt flow rate under ISO 1133-1:2022 is not a reliable predictor of thin-wall filling because glass fiber orientation and the carbon network alter flow. Spiral-flow tests in a 2 mm channel at 260 °C melt and 80 °C mold have shown flow-length reductions of 15–30% relative to unfilled conductive PA12. Mold-filling behavior must be validated with pressure-drop studies in the production tool, not with datasheet viscosity values.
Thin-wall electrostatic-dissipative parts such as sensor retainers, fuel-line brackets, and electronic clips create a process conflict between the high injection velocity needed to fill before freeze-off and the shear-induced loss of conductive carbon network. In end-gated cavities below 1.0 mm nominal wall, injection pressure settings above 60 MPa can produce shear rates at the gate above 10,000 s-1. At these shear rates, glass fibers align in the flow direction and the carbon particulates can orient or de-agglomerate, producing anisotropic electrical properties. Weld lines are particularly sensitive: because the glass fibers and carbon network must re-fuse, weld-line surface resistivity can be one to three decades higher than the surrounding surface if melt temperature is below 250 °C or mold temperature is below 60 °C. On a multi-cavity hot-runner tool, cavity-to-cavity resistivity variation has been observed when manifold flow-rate imbalance exceeded 2%; this variation is often misattributed to material lot changes rather than tool imbalance. The corrective action is to raise mold temperature to 80–90 °C, reduce screw speed to 50–70 rpm, and position gates so that weld lines are not placed across the charge path.
Fuel-system clips and sender-unit components benefit from the PA12 base because it absorbs less moisture than PA66. Under ISO 62, 24 h water absorption at 23 °C for glass-filled PA12 is typically 0.2–0.3%, whereas glass-filled PA66 can reach 0.8–1.5%. The lower moisture uptake translates into smaller dimensional change in humid conditions and less shift in flexural modulus. However, prolonged exposure to fuels containing methanol or peroxide species must be validated by ASTM D543 or an OEM-specific immersion standard; published data for ESD C 202 F under high-temperature M15 methanol blends is limited. Electrical function in low-humidity environments is generally maintained because the conductive carbon network does not rely on absorbed moisture, unlike migratory antistatic additive packages. In dry-as-molded PA12, surface resistivity remains within the static-dissipative range at 12% RH during short-duration exposure below 200 h, but no long-term environmental stability claim is made without a defined OEM test program.
Verification of ESD C 202 F should be performed on molded plaques, not on pellets. The relevant methods are ASTM D257 for surface and volume resistivity, IEC 61340-5-1 for static-discharge protection of electronic devices, and ASTM D638-14 for tensile-property lot acceptance. Because PA12 is semi-crystalline, test specimens should be conditioned at 23 °C and 50% RH per ISO 291 for moisture-sensitive mechanical testing. The carbon black in the compound can mark adjacent surfaces; contact packaging should be evaluated against the end user’s contamination limits. Regulatory documentation for RoHS and REACH should be obtained from the compounder for each production lot. The material is not automatically suitable for food-contact or potable-water use unless explicitly listed by the supplier for those applications.
| Property | Standard | Typical reported range |
|---|---|---|
| Specific gravity | ASTM D792 | 1.18–1.24 g/cm³ |
| Tensile strength at break | ASTM D638-14 | 55–70 MPa |
| Flexural modulus | ASTM D790-17 | 2.4–3.0 GPa |
| Notched Izod impact | ASTM D256 | 40–70 J/m |
| Surface resistivity | ASTM D257 | 105–109 Ω/sq |
| Water absorption | ISO 62 | 0.2–0.3% at 24 h / 23 °C |
Compared with an unfilled conductive PA12, ESD C 202 F is selected where dimensional stability and creep resistance are required. The glass fiber raises flexural modulus by roughly 60–100% relative to the unfilled analogue but may reduce notched Izod impact from the 80–100 J/m band to the 40–70 J/m band. Compared with a 30% glass-filled PA12 ESD grade, the 15% loading is less abrasive to mold cores and produces less surface fiber bloom; the trade-off is lower modulus and lower heat deflection. When replacing an existing PA66 15% glass ESD compound, the expected benefits are moisture-related dimensional stability, lower density, and better retention of dry-as-molded toughness at temperatures below 0 °C. The replacement must account for a lower heat deflection temperature; glass-filled PA12 grades can deflect under 1.8 MPa load at temperatures of approximately 150–170 °C, whereas glass-filled PA66 grades typically range from 220–240 °C under the same test method. Mounting near exhaust shields or turbocharger lines therefore requires a thermal load check according to ASTM D648 or ISO 75.
Electrical test coupons cut from molded parts should be conditioned at room humidity for 48 h before measurement. Immediately after molding, surface resistivity can read lower because of trapped static charge, then rise as the surface equilibrates. Cleaning with solvent can alter surface resistivity; isopropanol is preferred over aromatic or ketone cleaners because some carbon-rich surfaces can be extracted by strong solvents. Measurement electrodes should be applied along the melt-flow direction and perpendicular to it to quantify anisotropy; a difference above one decade between the two directions indicates gate location or fiber orientation problems. If the application must survive automated handling with high-speed pick-and-place, the electrical target is not simply one resistivity value but a charge-decay time below 2 s and a peak potential below 100 V in the supplier’s electrostatic test method. Adapting this grade to such requirements requires prototype tool validation because the final charge-decay response depends on wall thickness, gate design, and carbon network integrity after molding.
