| HS Code | 640262 |
| Specific Gravity | 1.21 |
| Water Absorption 24 Hours | 0.15% |
| Carbon Fiber Content | 30% |
| Tensile Strength Ultimate | 22,000 psi |
| Tensile Modulus | 1,800,000 psi |
| Tensile Elongation At Break | 1.5% |
| Flexural Strength | 28,000 psi |
| Flexural Modulus | 1,500,000 psi |
| Izod Impact Notched | 1.2 ft-lb/in |
| Izod Impact Unnotched | 7.0 ft-lb/in |
| Deflection Temperature 66 Psi | 350°F |
| Deflection Temperature 264 Psi | 320°F |
| Coefficient Of Linear Thermal Expansion | 1.5 x 10^-5 in/in/°F |
As an accredited RTP Company RTP 282 F Nylon 12 (PA), Carbon Fiber factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied as sealed multi-wall paper bags containing 25 kg of RTP 282 F Nylon 12 carbon-fiber compound. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with RTP 282 F Nylon 12 (PA) carbon fiber compound, securely packed, protected from moisture, ready for transport. |
| Shipping | RTP 282 F Nylon 12 (PA) with Carbon Fiber ships as a non-dangerous thermoplastic composite. It is supplied in sealed, moisture-resistant packaging to prevent resin degradation. Keep dry, avoid excessive heat, and handle carefully to minimize carbon fiber dust exposure. No special hazardous goods declaration required for standard ground or air freight. |
| Storage | Store RTP 282 F Nylon 12 (PA) with carbon fiber in its original, sealed container in a cool, dry, well-ventilated area. Protect from moisture, direct sunlight, and excessive heat to prevent degradation. Keep away from open flames or ignition sources. Avoid unnecessary exposure to air; reseal promptly after use. |
| Shelf Life | Shelf life is indefinite when stored in original, sealed packaging away from moisture, heat, and UV; dry before processing. |
RTP Company RTP 282 F is a pre-compounded nylon 12 pellet reinforced with nominal 20 wt% carbon fiber. The material is supplied as a complete molding compound; no separate carbon fiber addition is required or recommended at the downstream press. The application scope below is restricted to established industrial uses of carbon-fiber-reinforced PA12 in which low moisture uptake, dimensional stability, electrostatic dissipation, or chemical resistance controls part selection. Each scenario identifies the applicable compliance framework, formulation addition ratio, downstream production process, and terminal article forms. Processing conditions reflect production-scale equipment behavior; lot-specific values must be confirmed against supplier documentation and retained material certificates. Pre-drying is mandatory whenever ambient relative humidity exceeds 60% during storage.
Automotive fuel vapor quick connectors and fuel filter shells are produced from RTP 282 F because the PA12 matrix absorbs less than 0.3% moisture at 23°C and 50% RH when tested under ISO 62; this low uptake limits hydrogen-bond-induced dimensional drift in snap-fit retention features. The compound is processed at 100 parts by weight as supplied. No additional carbon fiber is introduced at the press. Regrind from sprues and runners is limited to 15 wt% of total shot weight because higher regrind content widens shrinkage variation beyond ±0.05% and reduces weld-line burst strength. A mold-release masterbatch, when required for undercut latch geometries, is metered at 0.5 phr maximum and pre-dried separately to 0.06% moisture. Dimensional compliance is judged after 24 h conditioning at 23±2°C and 50±5% RH. The applicable test framework includes SAE J2044 for quick connector mating dimensions and extraction force, ISO 19096-2 for fuel-system compatibility validation, and evaporative emission limits under CARB LEV III or EPA Tier 3 vehicle standards. Leak decay testing is typically performed at 250 kPa air pressure on finished connector bodies.
Production molding uses a desiccant dryer at 80°C to a residual moisture ceiling of 0.06%. Barrel zones are profiled from 240°C at the feed throat to 260–270°C at the nozzle, with an absolute maximum of 280°C. Mold temperature is maintained at 80–100°C to develop sufficient crystallinity and to reduce post-mold shrinkage. Screw L/D is 20:1–24:1; compression ratio is 2.5:1–3.0:1. Clamp force is calculated at 55–75 MPa over the projected area of cavities and runners. Sequential valve-gate hot runners are used where possible because carbon fiber does not bridge knit lines; when a weld line is unavoidable, the gate location is moved so the weld does not cross the snap-fit retention lugs. Barrel residence time is limited to 10 min at 270°C to avoid chain scission and fiber-matrix separation, which produce wall thickness variation and internal porosity. Terminal article forms produced under this regime are SAE J2044-dimensioned fuel line quick connectors, EVAP canister fittings, fuel filter housing end caps, and cooling circuit quick connectors.
Where load-bearing ankle-foot orthoses are converted from glass-filled polypropylene to carbon-fiber-reinforced PA12, the substitution is evaluated when shell thickness must drop below 2.8 mm without sacrificing bending stiffness. The finished orthosis is tested to ISO 22523:2006 for mechanical strength and dimensional stability; for prosthetic structural analogues, cyclic loading follows ISO 10328:2016 with endurance runs of 2×106 cycles. Published multi-axial fatigue data for this specific RTP 282 F configuration in AFO shells is limited, so device-level fatigue testing remains mandatory before clinical use. The grade is not certified for permanent implant use; no ISO 10993 claim is made for this compound without supplier documentation. For injection-molded orthotic shells, the compound is used at 100 phr as supplied; regrind is excluded from primary structural elements because repeated heat history shortens fiber length and increases anisotropic warpage in thin sections. If a toughening masterbatch is required for cold-climate use, it is metered at 2.0–3.0 phr and must be dried to 0.06% moisture. Sheet extrusion for subsequent vacuum forming uses a single-screw extruder with L/D 24:1 and a heated die gap of 2.0–4.0 mm; melt temperature is held at 250–265°C. Forming is performed at a sheet surface temperature of 210–230°C. Edge clamping must compensate for measured shrinkage anisotropy of 0.15% in the flow direction and 0.35% in the transverse direction per ISO 294-4. Terminal forms include solid ankle AFO struts, foot drop orthosis leaf springs, and lower-limb prosthetic socket diagnostic frames.
Unbonded flexible pipe ancillaries made from unfilled PA12 exhibit creep in clamping zones where metal backing rings impose compressive stress at 80°C in synthetic seawater. RTP 282 F is therefore used for non-pressure-retaining elements that require higher creep modulus and lower thermal expansion than unfilled PA12. Qualification practice for these ancillary parts references API 17J and ISO 13628-2; elastomeric sealing elements are tested under NORSOK M-710, while the PA12 component is assessed for dimensional change after 1000 h immersion in synthetic seawater at 80°C. The material is not a substitute for steel pressure armor or pressure sheath, and design practice confines its use to spacers, bushings, and brackets outside the primary pressure containment. The compound is processed at 100 phr without dilution. Reducing carbon-fiber content by blending with unfilled PA12 is forbidden in this scenario because creep modulus and collapse resistance scale nonlinearly with fiber volume fraction. A UV stabilizer masterbatch, if used on topside riser components, is metered at 1.0 phr maximum and must be dried to 0.05% moisture before metering.
Large end-fitting bushings are injection molded on a 1,200 t clamp force machine when shot weight exceeds 5 kg; screw diameter is 80 mm with L/D 22:1. Pre-drying is performed at 90°C to 0.05% residual moisture. Mold temperature is increased to 100–120°C to minimize post-mold warpage within the crystallization window of PA12; the resulting cycle time for thick sections extends to approximately 180 s. Nozzle contact force and decompression settings are adjusted for melt compressibility when shot weight exceeds 5 kg, because carbon fiber suspensions exhibit larger pressure-volume-temperature hysteresis than unfilled PA12. Terminal article forms are bend stiffener inserts, riser clamp spacer rings, end-fitting electrical isolation bushings, and VIV strake connector brackets.
Electronic assemblers handling devices sensitive to 200 V human-body-model discharges specify static-dissipative polymer handling trays when carbon black sloughing is unacceptable in cleanroom environments. Surface resistance of molded RTP 282 F trays is tested between 1×105 Ω and 1×109 Ω per ANSI/ESD S20.20-2021 using test method IEC 61340-5-1; charge decay to 10% of initial voltage is recorded at 12% RH. The compound is used as supplied at 100 phr; no antistat is added because the carbon-fiber network provides the dissipation path. Regrind is capped at 20 wt%, above which surface resistivity can exceed 1×109 Ω due to fiber network disruption without ionic species compensation. Injection molding uses melt temperature 250–265°C and mold temperature 60–80°C. Hot runner drops below 1.0 mm are avoided because carbon-fiber aggregation at restricted flow sections causes nonuniform resistivity; if a smaller drop is unavoidable, resistance mapping across 12 points per tray is required. Terminal product types are semiconductor wafer cassette brackets, PCBA transport rails, disk drive handling trays, and test socket bodies.
Food-processing drive gears molded from RTP 282 F operate against stainless steel shafts in flour dust and washdown humidity, where unfilled PA12 tooth flanks wear and dimensionally shift. The base PA12 must meet FDA 21 CFR 177.1500 for nylon resin; for continuous dry food contact, Regulation (EU) No 10/2011 overall migration testing applies. Gear accuracy is certified to AGMA ISO 1328-1:2013, typically grade Q8 for molded spur gears. An internal lubricant masterbatch, when used to reduce coefficient of friction against stainless steel shafts, is let down at 1.0 phr. Regrind is limited to 10 wt% for Q8 gears because tooth-to-tooth radial runout increases when fiber length distribution broadens; for non-precision cam rollers, regrind may rise to 25 wt% if dimensional tolerance is relaxed to ±0.10 mm. Molding uses melt temperature 245–265°C and mold temperature 70–85°C; gate thickness is set to 60–70% of the root wall thickness to prevent jetting. Shrinkage compensation for tooth profile and bore is applied as 0.3% in flow direction and 0.6% transverse direction, verified by gear metrology after 48 h conditioning. Terminal products are conveyor drive spur gears, cam followers, wear strips, and roller chain tensioner shoes.
Bicycle pedal body and ski touring binding manufacturers use RTP 282 F where impact toughness must be retained at -20°C without the weight of glass-filled PA6. Bicycle pedal assemblies are tested under ISO 4210:2015 fatigue and impact clauses; ski touring binding toe cups reference ISO 9462 for release torque stability after low-temperature conditioning. The formulation is processed at 100 phr; regrind is limited to 15 wt%, and no impact modifier is used at wall thickness above 3.0 mm because the carbon-fiber reinforcement already reduces sharp notch sensitivity in the PA12 matrix. Pre-drying is performed at 80°C to 0.06% moisture; melt temperature is 250–265°C and mold temperature 80–100°C. Thin-wall drone arm bushings may require the upper mold-temperature bound to improve knit-line strength. Terminal article forms are bicycle pedal bodies, ski touring binding toe cups, drone arm bushings, and sports wheelchair rim guards.
| Scenario | Residual moisture limit | Melt temperature range | Mold temperature range | Screw L/D |
|---|---|---|---|---|
| Fuel vapor quick connectors | < 0.06% | 250–270°C | 80–100°C | 20:1–24:1 |
| Orthotic sheet and shells | < 0.06% | 250–265°C | 80–100°C molding; 210–230°C forming | 24:1 |
| Offshore pipe ancillaries | < 0.05% | 250–270°C | 100–120°C | 22:1 |
| ESD handling trays | < 0.06% | 250–265°C | 60–80°C | 20:1–24:1 |
| Food-processing gears | < 0.06% | 245–265°C | 70–85°C | 20:1–24:1 |
| Sports equipment | < 0.06% | 250–265°C | 80–100°C | 20:1–24:1 |
| Scenario | Standards and regulations | Measurement condition or clause |
|---|---|---|
| Fuel vapor quick connectors | SAE J2044, ISO 19096-2, CARB LEV III, EPA Tier 3 | Mating force, fuel compatibility, leak decay at 250 kPa |
| Orthotic/prosthetic structures | ISO 22523:2006, ISO 10328:2016 | Mechanical strength, 2×106 load cycles device-level fatigue |
| Offshore pipe ancillaries | API 17J, ISO 13628-2, NORSOK M-710 | Seawater immersion at 80°C, 1000 h dimensional change |
| ESD handling trays | ANSI/ESD S20.20-2021, IEC 61340-5-1 | Surface resistance 1×105–1×109 Ω, 12% RH charge decay |
| Food-processing gears | FDA 21 CFR 177.1500, Regulation (EU) No 10/2011, AGMA ISO 1328-1:2013 | Dry food contact migration, grade Q8 tooth accuracy |
| Sports equipment | ISO 4210:2015, ISO 9462 | -20°C impact, release torque after low-temperature conditioning |
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RTP Company RTP 282 F is a carbon-fibre-reinforced polyamide 12 (PA 12) compound supplied in pellet form for injection moulding and extrusion. The product designation combines the 282 series PA 12 matrix with the F suffix identifying carbon fibre reinforcement; the exact fibre loading is stated in the supplier’s technical data sheet and is not a single universal value for all compounds in the 282 series. The material is used where a balance of low moisture uptake, dimensional stability, low-temperature impact, and controlled surface conductivity is required. Because PA 12 absorbs less water at equilibrium than PA 6 or PA 66, the mechanical properties of RTP 282 F shift less in humid service than short-carbon-fibre-reinforced PA 66 grades. The carbon fibre, however, introduces electrical conductivity, higher melt viscosity, and abrasive wear that are absent in unfilled or glass-filled PA 12. All values in this document are laboratory-moulded reference data and are not guarantees for production parts.
Carbon fibre orientation in the moulded part controls property development more strongly than in glass-filled PA 12 because fibre aspect ratio, fibre-matrix adhesion, and skin-core morphology influence tensile, flexural, and electrical outcomes. Injection-moulded plaques develop a fibre-rich surface skin that lowers surface resistivity, but the effect is orientation- and gate-sensitive. Weld lines in multi-gate components disrupt fibre packing and can produce localised insulative or mechanically weak regions. Consequently, the designation RTP 282 F does not by itself define an isotropic property set; the moulder must control fibre length retention from pellet to part using screw design, back pressure, and gate geometry.
Carbon fibre differs from E-glass fibre in electrical conductivity, thermal conductivity, density, and surface hardness. In RTP 282 F, the carbon fibre lowers surface resistivity from the insulative range of unfilled PA 12—commonly above 1E13 Ω/sq when tested per ASTM D257—to a dissipative or conductive range that depends on fibre content, fibre length retention, moulded surface condition, and gate placement. Supplier values for carbon-fibre-reinforced PA 12 grades typically fall between 1E1 and 1E6 Ω/sq, but published data for this specific configuration must be confirmed on production parts because surface resistivity in injection-moulded compounds is sensitive to weld lines, resin-rich skins, and fibre orientation. Compared with glass-filled PA 12, the carbon-fibre compound exhibits a lower coefficient of linear thermal expansion and a higher flexural modulus at equivalent filler volume fraction; however, elongation at break is reduced, and the compound may display brittle failure under high-speed puncture unless design geometry avoids sharp corners and direct out-of-plane loading.
Specific gravity of carbon-fibre-filled PA 12 is lower than that of carbon-fibre-filled PA 66 and higher than unfilled PA 12; supplier ranges for RTP 282 F are commonly reported in the 1.10–1.15 range under ASTM D792. The density advantage relative to PA 66 compounds is relevant in weight-sensitive automotive clips, sensor housings, and cable conduits. In comparison with RTP Company glass-fibre PA 12 products, RTP 282 F generally improves dry-running wear resistance and increases thermal conductivity, but it also introduces a galvanic corrosion risk if the moulded part is assembled with uncoated aluminium or magnesium under moist conditions. That incompatibility belongs to carbon-fibre-filled polymer systems broadly and should be evaluated before adopting RTP 282 F in multi-material assemblies.
Compared with long-carbon-fibre PA 12 compounds, RTP 282 F is a short-fibre compound with lower notched impact and lower long-term creep resistance but easier thin-wall filling and lower mechanical anisotropy. Compared with carbon-black-filled PA 12, carbon fibre provides higher tensile stiffness and lower moisture uptake, but it also creates more abrasion on mating surfaces and higher thermal conductivity. The selection between RTP 282 F and a glass-filled PA 12 therefore depends not on a single property but on whether electrical conductivity and lower density justify the higher compound cost and reduced impact ductility.
The reference values in Table 1 are compiled from publicly available data for carbon-fibre-reinforced PA 12 compounds and from supplier technical literature. Where a single datasheet value is not available, a range is given. Values are conditioned at 23°C and 50% relative humidity unless otherwise stated.
| Property | Method | Typical range or value | Unit |
|---|---|---|---|
| Specific gravity | ASTM D792 | 1.10–1.15 | — |
| Tensile strength at break | ASTM D638 | 124–145 | MPa |
| Tensile elongation at break | ASTM D638 | 1.5–2.5 | % |
| Flexural modulus | ASTM D790 | 8.3–11.0 | GPa |
| Flexural strength | ASTM D790 | 165–200 | MPa |
| Notched Izod impact | ASTM D256 | 40–60 | J/m |
| Deflection temperature at 1.82 MPa | ASTM D648 | 141–160 | °C |
| Surface resistivity | ASTM D257 | 1E1–1E6 | Ω/sq |
| Volume resistivity | ASTM D257 | 1E1–1E5 | Ω·cm |
These ranges should be interpreted as engineering guidance rather than production release limits. The supplier’s certificate of analysis for the specific lot governs lot-to-lot tensile and rheological acceptance, and published data for this exact compound are limited for long-term creep and fatigue. At low carbon fibre loadings near the electrical percolation threshold, surface resistivity can shift by several orders of magnitude over a narrow filler-content interval. This percolation behaviour means that small lot-to-lot changes in fibre dispersion or fibre length can move the moulded part from dissipative to conductive. The exact percolation threshold for RTP 282 F is proprietary; published data for this specific configuration is limited.
Prior to melt processing, RTP 282 F pellets should be dried to a moisture content below 0.10% by weight. Typical drying conditions for carbon-fibre-reinforced PA 12 are 80°C at a dew point of -29°C or lower for 4 h, using a desiccant-bed hopper dryer. Hydrolysis during plastication is the principal processing risk; retained moisture above 0.15% reduces melt viscosity through chain scission, producing splay, brittle weld lines, and loss of tensile strength. Melt temperature at the nozzle should be maintained within 204–232°C; excursions above 250°C may initiate thermal degradation of the PA 12 matrix, particularly because carbon fibres conduct heat unevenly and create local temperature differences. Mould temperature is normally set in the 66–93°C range to control crystallinity and reduce post-mould warpage. Injection speed and packing pressure must account for the higher melt viscosity of carbon-fibre-filled material; insufficient packing produces internal voids and surface pits. A screw L/D ratio of 20:1 or greater is typical for complete melting, and the check ring, screw flights, and barrel lining should be hardened for carbon-fibre abrasion. Back pressure of 0.35–0.70 MPa may be used to improve melt homogeneity, but higher back pressure increases fibre breakage and can shift surface resistivity upward.
During plastication, apparent melt viscosity is higher than that of unfilled PA 12 by a factor that changes with shear rate and fibre content. At injection moulding shear rates of 1E2–1E4 s-1, carbon-fibre-filled PA 12 exhibits shear-thinning behaviour; therefore, fill-time calculations based on unfilled PA 12 viscosity under-predict injection pressure. Capillary rheometry data for carbon-fibre-filled PA 12 grades show that apparent viscosity at 1E3 s-1 can be 1.5–2.5 times that of unfilled PA 12. Published data for RTP 282 F at this shear rate are limited, and mould-filling simulations should be validated with in-mould pressure sensors and production-tool geometry. Fibre length attrition in the screw, check ring, runner, and gate reduces tensile modulus and electrical conductivity; therefore, long flow paths through restricted gates should be avoided or monitored by fibre length measurement methods such as ISO 22314.
Weld-line strength in carbon-fibre-reinforced PA 12 is lower than in the unfilled matrix and is governed by fibre orientation at the knit line. Published studies on short-carbon-fibre polyamides report tensile strength reductions of 40–60% at weld lines relative to non-weld regions when tested per ASTM D638. This is a design boundary, not a material defect. Gate placement that orients the knit line away from the maximum principal stress is required. Snap-fit features must be evaluated with the reduced elongation at break of the compound; design strain should be derived from the tensile elongation of the specific lot and from fatigue data, not from unfilled PA 12 practice.
On an 80-tonne injection moulding machine with a 32 mm general-purpose screw and shut-off nozzle, moulding of RTP 282 F into thin-wall connectors may require cushion distances of 3–5 mm and decompression settings below 5 mm to avoid drool and fibre agglomeration at the nozzle. Recovery delay should be set to maintain melt residence time below 8–10 min. When hot-runner systems are used, externally heated manifolds with open-pipe melt channels are preferred over internally heated torpedoes because carbon fibre can accumulate at dead spots and form conductive deposits that alter surface resistivity. Batch-to-batch variation in carbon fibre surface treatment has been observed on production lines as shifts in surface resistivity of 0.5–1.0 decade for the same nominal filler loading. Incoming resin lots should therefore be tested for surface resistivity and tensile strength using moulded plaques from a controlled tool, because pellet-surface moisture alone is not a sufficient predictor.
Electrostatic dissipative applications form a primary use case. In semiconductor wafer handling and electronics assembly, moulded nests, sockets, and tooling fabricated from carbon-fibre PA 12 may satisfy dissipative packaging requirements under IEC 61340-5-1 when surface resistivity is maintained in the dissipative range. The material is also evaluated for automotive fuel-line clips, cable conduits, and sensor housings where low moisture uptake and dimensional stability under underhood temperature cycling are required. Because PA 12 has lower saturated water absorption than PA 6 or PA 66, RTP 282 F is considered where humid-service mechanical properties must remain close to dry-as-moulded values. However, continuous service temperature is lower than that of carbon-fibre-reinforced PA 66, and deflection temperature under load is not a long-term heat-ageing limit. Long-term heat ageing data for this specific compound are limited.
A surface resistivity measurement on the fibre-rich skin of a moulded RTP 282 F part may indicate conductive character, whereas a cross-section measurement may show dissipative or borderline insulative behaviour. Measurements must therefore specify electrode placement and sample thickness. ASTM D257 itself does not define a universal pass/fail limit for electrostatic discharge applications; application-specific limits such as 1E4–1E11 Ω for dissipative packaging and 1E2–1E6 Ω for conductive tooling are drawn from ANSI/ESD S20.20 and IEC 61340-5-1. Published data for this specific configuration is limited, so qualification on the production tool is mandatory.
Regulatory compliance must be verified at the part level. RoHS restrictions on hazardous substances are generally addressed in the base resin and carbon fibre supply chain, but the final moulded component may require lot-level documentation under IEC 62321. Food-contact status under FDA 21 CFR 177.1500 may apply to PA 12 polymers, but carbon fibre is not automatically cleared, so each formulation and end use requires separate evaluation. REACH registration obligations for the monomer and fibre are typically managed by the raw material suppliers; downstream moulders remain responsible for documentation and intentional release assessments.
