| HS Code | 493457 |
| Product Name | VESTAMID CW1407 BK |
| Polymer Family | Polyamide 12 (Nylon 12) |
| Reinforcement Type | Carbon Fiber |
| Reinforcement Content | 40% |
| Density | 1.24 g/cm³ |
| Tensile Modulus | 11500 MPa |
| Tensile Strength At Break | 155 MPa |
| Tensile Strain At Break | 2.0% |
| Charpy Impact Strength 23c | 45 kJ/m² |
| Charpy Notched Impact Strength 23c | 6 kJ/m² |
| Melting Point | 178 °C |
| Heat Deflection Temperature 1 8mpa | 170 °C |
| Volume Resistivity | 1e3 ohm·cm |
As an accredited Evonik VESTAMID CW1407 BK Nylon 12, Carbon Fiber Reinforced factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Evonik VESTAMID CW1407 BK is packaged in moisture-resistant, sealed 25 kg bags to prevent moisture uptake and contamination. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with palletized, secured bags/boxes of Evonik VESTAMID CW1407 BK, protected from moisture and damage. |
| Shipping | Evonik VESTAMID CW1407 BK is shipped as moisture-sensitive, carbon-fiber-reinforced nylon 12 pellets. Supplied in sealed, desiccant-lined bags to prevent moisture uptake and static buildup. Transport under dry conditions, avoiding excessive heat and impact. Ensure proper labeling and secure loading to prevent bag damage during transit. |
| Storage | Store VESTAMID CW1407 BK in its original, unopened packaging in a cool, dry area away from direct sunlight, heat sources, and moisture. Keep containers sealed when not in use to prevent water absorption. Avoid contamination with dust or other polymers. Under proper conditions, it maintains good processing properties within its specified shelf life. |
| Shelf Life | Shelf life is typically 2 years if stored dry, sealed, and away from direct sunlight and heat sources. |
For under-hood fuel-line retention brackets and clipped harness guides, the compound class represented by Evonik VESTAMID CW1407 BK is selected where the aliphatic PA12 backbone provides lower equilibrium moisture uptake than PA6 and PA66. Before moulding, the material is dried to residual moisture below 0.1% by weight using a desiccant dryer with air temperature between 70°C and 80°C and a dew point no higher than -40°C for 4–8 h. The barrel profile from feed throat to nozzle is set between 230°C and 275°C, with the nozzle and hot runner maintained below 280°C to limit matrix oxidation. When tested per ISO 527-1/-2 at 23°C and 50% RH, carbon-fibre reinforced PA12 grades of this class generally retain a higher dry-as-moulded tensile modulus than short-glass PA12 at the same fibre mass fraction because carbon fibre has lower density and higher specific stiffness; published values for 20–30 wt% carbon-fibre reinforced PA12 typically fall between 14,000 MPa and 22,000 MPa, while the exact VESTAMID CW1407 BK value must be taken from the current Evonik technical datasheet. On production machines using general-purpose three-zone screws of L/D 18–22, fibre attrition is the dominant source of lot-to-lot mechanical variation. Maintaining back pressure below 50 bar and screw surface speed below 0.6 m/s reduces fibre breakage; however, for ribs exceeding 3.0 mm, excessively low back pressure causes sinks and microvoids, so vacuum venting or counter-pressure is used during plastication. Weld lines produced by multi-gated tools reduce tensile strength to 55–70% of non-weld-line values when tested per ISO 527-2; gate placement must therefore keep weld lines out of snap-fit arms and living hinges.
Because carbon fibre reinforcement creates an anisotropic shrinkage field, gate placement must be fixed before tool detailing. A fan gate feeding the longest edge produces planar fibre orientation that minimises warpage in flat retention brackets, while a single tunnel gate into a tall rib creates differential shrink from the rib root to the free end. Specimens measured according to ISO 294-4 can show post-mould shrinkage of 0.20–0.50% parallel to flow and 0.40–0.85% transverse to flow, with the higher value approaching the unfilled PA12 upper limit. Dimensional audit should therefore use coordinate measuring machine data at 48 h after moulding, not immediately after ejection. Fuel exposure is assessed by ISO 1817:2015 immersion in FAM B at 23°C for 168 h; mass change below 1.0% and tensile strength retention above 85% are typical for PA12 compounds in this fluid class. The carbon reinforcement reduces swelling anisotropy but raises notch sensitivity. Because the fibre network is electrically conductive, aluminium fasteners in direct contact may require isolation washers or coated shanks to prevent galvanic corrosion at the joint interface.
In downhole coupling sleeves and end fittings for PA12-lined flexible flowlines, bore ovality after gate freeze and fibre-rich weld lines govern insertion force and seal contact pressure. The PA12 matrix crystallises between 170°C and 178°C; carbon fibres act as heterogeneous nucleation agents, raising crystallisation rate and producing anisotropic shrinkage that is lower in the fibre direction and higher transverse to flow. This differential shrinkage is the primary process conflict. Raising mould temperature to 100–120°C relaxes orientation and reduces ovality but extends cycle time by 20–40% because the nucleated matrix solidifies rapidly once cooling starts. Cavity pressure transducers show that maintaining packing pressure until gate seal requires 6–10 s/mm wall thickness and hydraulic packing pressures of 60–80 MPa depending on machine intensification ratio. The gate freeze must be confirmed by short-shot progression rather than theoretical cooling time, because the carbon fibre network changes melt-front behaviour and masks the true gate-seal point.
| Moulding parameter | Thin-wall automotive bracket | Thick-wall coupling sleeve |
|---|---|---|
| Barrel profile | 230–275°C | 240–260°C |
| Mould temperature | 60–100°C | 100–120°C |
| Residual moisture | <0.1% | <0.08% |
| Back pressure | 20–50 bar | 30–60 bar |
| Packing phase | 4–6 s/mm | 6–10 s/mm |
Weld-line tensile efficiency is assessed by producing ISO 527-2 type 1A specimens with a weld line at mid-gauge and comparing them with non-weld specimens; for carbon-fibre PA12 the ratio commonly falls between 0.50 and 0.70. For coupling sleeves this means direct gate flow into the bore creates a discontinuous fibre network opposite each gate, reducing hoop stress capacity. Tools are therefore built with multiple valve gates, sequential valve opening, or centre film gates with overflow wells. Published data for this specific VESTAMID CW1407 BK configuration is limited, so cavity pressure curves must be correlated with ovality measurements and insertion force tests. Wall sections above 10 mm introduce an additional risk of internal porosity because the carbon fibre increases shear heating, but the semi-crystalline PA12 matrix solidifies too quickly for air evacuation at ambient cavity pressure. Counter-pressure venting or gas venting through sintered inserts is required.
When replacing machined POM or PA6 gears in low-to-medium power transmission, carbon-fibre PA12 is evaluated only after VDI 2736 load curves have been recalculated for material-specific wear and fatigue coefficients. Carbon reinforcement raises the flexural modulus and reduces frictional heating, but it also lowers elongation at break and increases tooth-root notch sensitivity. Fibre orientation at the tooth root is controlled by gate type: centre-gated disc gears produce radial orientation that gives high radial stiffness but poor tangential load transfer, while diaphragm gates or three-plate tools with ring gates orient fibres along the tooth flank. Gear blanks must be moulded with packing profiles that avoid shrinkage voids at the hub-to-rim transition; short shots and gas traps are common when wall-thickness changes exceed 40%. Melt temperature is held at the upper end of the processing window to reduce viscosity, but residence time is kept below 5 min at 260–270°C to limit oxidative degradation of the PA12 matrix.
Fatigue testing follows VDI 2736 and ISO 13003 guidance; published data for this specific VESTAMID CW1407 BK configuration is limited, so tooth-root stress must be validated on a back-to-back gear test rig with load steps corresponding to the actual torque spectrum. The mating steel gear is specified with surface hardness above 55 HRC and tooth-flank roughness Ra between 0.4 µm and 0.8 µm; higher roughness accelerates abrasive wear of the carbon-fibre PA12 flank. Synthetic hydrocarbon greases are preferred because carbon fibre dust generated during initial running-in can act as a polishing agent, and vented gear housings are required to prevent dust accumulation on optical sensors. In continuous duty, the PV limit of the carbon-fibre PA12 gear pair must be de-rated from unreinforced PA12 values because fibre-rich surfaces transfer heat differently than neat polymer surfaces under mixed-film lubrication.
Pneumatic manifolds and threaded fittings injection-moulded from carbon-fibre PA12 are processed with a slightly lower melt temperature than thick-wall couplings because thin walls and long flow lengths require lower viscosity. The material is dried to 0.08% residual moisture, and melt residence time is kept below 5 min to prevent oxidative darkening. Hydrolytic stability is evaluated by conditioning specimens at 70°C and 62% RH per ISO 1110; equilibrium moisture content in the matrix reaches 0.5–0.7%, which reduces tensile strength by 10–15% relative to dry-as-moulded values while increasing impact resistance. Threaded insert retention is designed with an outer boss diameter of at least 2.0 times the insert outer diameter and a minimum wall thickness of 1.5 mm around the insert. Ultrasonic insertion is preferred; excessive amplitude above 20 µm causes local melting at the knurl, which promotes radial cracks in carbon-fibre-reinforced grades. The conductive fibre network also requires clearance and creepage verification per IEC 60664-1 when fittings are mounted near live terminals.
In carbon-fibre reinforced PA12 bicycle cleat and drone arm applications, the selection driver is low density and sub-zero impact behaviour rather than continuous creep resistance. Notched Charpy impact measured per ISO 179-1/1eA at -30°C is significantly lower than unreinforced PA12; published data for this VESTAMID CW1407 BK configuration is limited, so part-level impact testing must be conducted on cold-conditioned mouldings. The fibre-rich surface is electrically conductive enough to require insulated mounting points in drone arm designs to avoid short circuits across adjacent conductors.
Where metallic housings are replaced for mass reduction, the fibre network provides surface resistivity in the static-dissipative range once fibre loading exceeds the percolation threshold. Electrical testing follows IEC 62631-3-2 or ASTM D257-14; carbon-fibre filled polyamides commonly report surface resistance from 10³ to 10⁶ Ω/sq depending on fibre weight fraction and orientation. The percolation threshold creates sensitivity to moulding conditions: excessive melt temperature, long residence time, and high shear degrade fibre aspect ratio and shift resistivity upward. Injection speed and packing pressure influence fibre distribution; parts moulded at too low a melt temperature show high surface resistivity at the weld line because the fibre network is discontinuous. The compound is black, so laser marking with a fibre laser is used for traceability; standard pad printing on carbon-fibre PA12 requires a primer-based two-component ink and adhesion testing per ISO 2409.
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The compound designated Evonik VESTAMID CW1407 BK is a black-pigmented, carbon fiber–reinforced polyamide 12 supplied for injection moulding and extrusion-based manufacturing where the PA12 matrix contributes low moisture uptake, chemical resistance, and dimensional stability while the carbon fiber reinforcement raises stiffness, lowers thermal expansion, and modifies electrical behavior. The grade identifier CW1407 BK places the material within the VESTAMID PA12 portfolio as a carbon fiber–reinforced variant, with the BK suffix indicating black coloration. Under ISO 1043 nomenclature, the material is classified as a carbon fiber–reinforced polyamide. Specification conformance is commonly assessed on dry-as-moulded specimens conditioned according to ISO 291, with density determined by ISO 1183-1, tensile properties by ISO 527-1/-2, flexural properties by ISO 178, and notched impact resistance by ISO 179-1/1eA. Published numerical ranges for carbon fiber–filled PA12 compounds depend on actual fiber weight fraction and fiber length distribution; for CW1407 BK the supplier datasheet should be consulted for lot-specific values because fiber orientation and specimen preparation influence mechanical data more strongly than in unfilled grades.
Compared with unfilled VESTAMID PA12, carbon fiber reinforcement raises stiffness and reduces elongation at break. Unfilled PA12 tensile modulus is generally in the 1.4–1.6 GPa range under ISO 527-2/1A, whereas carbon fiber–reinforced PA12 grades can show tensile modulus from 5 GPa to 15 GPa depending on fiber content, fiber length, and orientation. Elongation at break typically falls below 5% in the reinforced material, shifting failure from ductile yielding to semibrittle fracture. Charpy notched impact values decline relative to unfilled PA12; published ranges for unfilled PA12 are often 4–8 kJ/m², while carbon fiber–reinforced compounds may fall to 3–6 kJ/m² under ISO 179-1/1eA. The direction of change is a reduction in energy absorption, but grade-specific values must be verified because fiber sizing and matrix adhesion control crack initiation.
Against glass-filled PA12, carbon fiber reinforcement provides a lower density at comparable stiffness. A 30 wt% glass fiber PA12 compound may have density near 1.24 g/cm³, while a carbon fiber compound at equivalent modulus can remain below 1.15 g/cm³ because less fiber is required for stiffening. Density is measured by ISO 1183-1. Carbon fiber also reduces the coefficient of linear thermal expansion more effectively than glass fiber in the flow direction, as measured by ISO 11359-2. However, carbon fiber introduces electrical conductivity, which may be undesirable in dielectric applications. Surface resistivity can fall below 10^6 Ω in carbon fiber–reinforced grades, while glass-filled and unfilled PA12 remain generally insulating. The specific surface resistivity of CW1407 BK should be confirmed by IEC 62631-3-2 because fiber loading, dispersion, and surface skin formation control percolation. Compared with carbon fiber–filled PA66, the PA12 matrix absorbs less water: PA12 at 23 °C and 50% relative humidity typically takes up about 0.7% moisture, while PA66 takes up about 2.5% under ISO 62. This reduces property shift in humid service and simplifies conditioning allowances for dimensional tolerance calculations.
| Property | Test method | Unfilled PA12 | Carbon fiber PA12 | Glass fiber PA12 |
|---|---|---|---|---|
| Density | ISO 1183-1 | 1.01–1.03 g/cm³ | 1.05–1.18 g/cm³ | 1.22–1.30 g/cm³ |
| Tensile modulus | ISO 527-2/1A | 1.4–1.6 GPa | 5–15 GPa | 6–8 GPa at 30 wt% |
| Charpy notched impact | ISO 179-1/1eA | 4–8 kJ/m² | 3–6 kJ/m² | 5–10 kJ/m² |
| Water absorption at 23 °C/50% RH | ISO 62 | 0.7% | 0.5–0.8% | 0.6–0.8% |
| CLTE flow direction | ISO 11359-2 | 100–120 ppm/K | 20–50 ppm/K | 30–50 ppm/K |
| CLTE transverse direction | ISO 11359-2 | 100–120 ppm/K | 60–90 ppm/K | 60–80 ppm/K |
Prior to melt processing, residual moisture in PA12-based compounds must be reduced to below 0.1% by weight to prevent hydrolytic chain scission during plastication. Moisture content is determined by Karl Fischer titration according to ISO 15512. Predrying in a desiccant dryer at 80 °C for 4 h to 8 h with a dew point not exceeding -30 °C is typical for VESTAMID PA12 grades. Carbon fiber reinforcement does not remove this requirement; black-pigmented grades may adsorb surface moisture rapidly when exposed to relative humidity above 60%. Material handling should therefore minimize open-air residence time between dryer and feed throat, and hopper loading should be maintained under dry air.
Injection moulding of carbon fiber–filled PA12 uses melt temperatures in the 220 °C to 250 °C range for general VESTAMID PA12 grades; the additional melt viscosity from carbon fiber may require an upward adjustment of 10–20 °C within the supplier's maximum limit. Mould temperatures from 80 °C to 120 °C are common for dimensionally stable CF-filled components; mould temperatures below 60 °C produce incomplete crystallization of the PA12 matrix and can raise post-mould shrinkage. Screw design should use a low-compression screw with an L/D ratio of 18:1 to 22:1 and a wear-resistant check ring. Carbon fiber accelerates screw, barrel, and mould wear; nitrided or bimetallic barrels and gate inserts hardened to at least HRC 55 are specified on production-scale equipment to control abrasion. Back pressure should be limited to avoid fiber length reduction; excessive shear heating produces local matrix degradation and splay.
Short-term tensile and flexural data for carbon fiber–filled PA12 are strongly dependent on specimen conditioning because the PA12 matrix absorbs less moisture than PA6 or PA66 but not zero. Standard conditioning at 23 °C and 50% relative humidity under ISO 291 produces water uptake below 1.0% for PA12 and typically below 3.0% for PA66. The effect of moisture on the composite is therefore smaller than in PA66-based carbon fiber compounds but still measurable: matrix plasticization reduces fiber-matrix interfacial shear strength and can lower flexural modulus by 5–15% relative to dry-as-moulded values, depending on fiber sizing and test temperature. Tensile strength is often less affected than modulus; elongation at break may increase slightly in conditioned specimens because matrix ductility improves. Creep and stress relaxation tests under constant load should be performed at the actual service temperature and humidity because short-term ISO 527 data do not capture fiber-matrix debonding under sustained load.
Fatigue response and long-term thermal aging require separate qualification. Continuous-use temperature claims require UL 746B relative thermal index listings; the RTI value assigned to a specific grade and thickness must be taken from the supplier's UL Yellow Card. Dynamic mechanical analysis in torsion per ISO 6721-7 can identify the temperature-dependent modulus retention and glass transition region of the PA12 matrix, but part-level validation under actual load history is required for structural components.
Carbon fiber–reinforced semicrystalline thermoplastics exhibit anisotropic shrinkage. Flow-induced fiber orientation in the surface layers versus the core creates differential shrinkage: longitudinal shrinkage along fiber direction is often below 0.2%, while transverse shrinkage can exceed 0.5% in injection-moulded plaques, measured after 24 h at 23 °C per ISO 294-4. A single isotropic shrinkage allowance is therefore insufficient for tool design. Mould filling simulations must use fiber orientation tensors calibrated to the actual fiber length distribution of CW1407 BK, and tool trials should include cavity pressure sensors to correlate packing pressure with post-mould dimensions. Gate location determines the primary fiber orientation pattern: edge-gated tensile bars show higher apparent modulus than center-gated plaques because more fibers align with the load axis.
Weld lines represent a critical limitation. Carbon fiber does not bridge the melt front, so weld line tensile strength can fall to 40–60% of the base material strength. For load-bearing components, weld lines should be moved out of high-stress regions or the design should use film gates that produce a single flow front. Published data for this specific configuration is limited; moldflow simulations without measured fiber orientation data should be treated as qualitative. Tooling for carbon fiber–filled PA12 should also consider abrasive wear at gate lands and venting channels, with hardened inserts and wear plates specified in high-velocity flow regions.
In contact with aliphatic and aromatic hydrocarbons, oils, greases, and salt solutions, the PA12 matrix retains low mass uptake and limited dimensional change. Resistance should be assessed by ISO 175 or ISO 22088-1 under the actual fluid and thermal load. The carbon fiber phase is inert to most automotive and industrial fluids but can promote galvanic corrosion when in contact with certain metals in humid environments; direct contact with magnesium or coated aluminum should be evaluated for electrochemical compatibility. The electrical conductivity from carbon fiber requires design reviews for electronic housings where stray current paths or electrostatic discharge protection are relevant. Surface resistivity should be measured per IEC 62631-3-2 on a specimen with defined surface preparation; values vary with mould surface, fiber bloom, and machining. Thermal conductivity along the fiber direction is higher than through-thickness, which can reduce hot-spot accumulation in wear parts but also complicates ultrasonic welding and heat staking.
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