| HS Code | 937684 |
| Base Polymer | Nylon 12 (PA12) |
| Reinforcement | 15% carbon fiber |
| Density | 1.16 g/cm³ |
| Tensile Modulus | 10200 MPa |
| Tensile Strength | 125 MPa |
| Elongation At Break | 1.5% |
| Flexural Modulus | 9000 MPa |
| Flexural Strength | 165 MPa |
| Charpy Impact Unnotched 23c | 35 kJ/m² |
| Charpy Impact Notched 23c | 5 kJ/m² |
| Melting Point | 178 °C |
| Heat Deflection Temperature 0 45mpa | 175 °C |
| Heat Deflection Temperature 1 8mpa | 145 °C |
| Volume Resistivity | 1E6 ohm·cm |
As an accredited Evonik Vestamid L-GB30 15% Carbon Fiber Filled Nylon 12 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Evonik Vestamid L-GB30, 15% carbon fiber filled nylon 12 pellets, supplied in sealed 25 kg bags. |
| Container Loading (20′ FCL) | 20′ FCL loaded with Evonik Vestamid L-GB30, 15% carbon fiber filled nylon 12 granules, packed in sealed bags on pallets. |
| Shipping | This carbon-fiber-filled nylon 12 ships in sealed, moisture-barrier bags or fiber drums to protect against humidity. Classified non-hazardous for road, sea, and rail transport; standard freight is acceptable. Grounding precautions during transfer are recommended to control static. Keep pallets dry and stable to avoid damage. |
| Storage | Store Evonik Vestamid L-GB30 in its original, tightly sealed container in a cool, dry, well-ventilated area away from direct sunlight and heat sources. Protect from moisture and humidity, as nylon 12 absorbs water. Keep away from ignition sources. Reseal immediately after use to maintain material properties and ensure optimal processing performance. |
| Shelf Life | Store in original sealed packaging, cool and dry. Shelf life is typically 24 months from date of manufacture. |
For SAE J2044 quick connectors installed in multi-layer automotive fuel-vapour lines, the compound is processed as a fixed 15 wt% carbon-fibre-reinforced polyamide 12 system without further dilution by unreinforced PA12. Drying is carried out in a closed-loop desiccant-bed dryer at 80 °C for 4–8 h, with return-air dew point at or below −35 °C, so that residual moisture is below 0.1 % before plastication. Barrel temperature settings are held between 240 °C and 280 °C from rear zone to nozzle, with the nozzle separately controlled to limit shear heating when sprue-to-cavity pressure drop exceeds 60 MPa. Mould wall temperature is set between 60 °C and 90 °C; higher mould temperature reduces carbon-fibre orientation anisotropy at the weld plane but extends cooling time by 8–12 % per 10 °C increment. Screw geometry on production injection moulding machines in the 500–1,500 kN clamp range should use an L/D ratio of at least 20:1, compression ratio 2.0–2.5:1, and a circumferential velocity below 0.25 m/s to limit fibre attrition. Back pressure is maintained between 2 MPa and 5 MPa to control shot-to-shot fibre-length distribution without inducing excessive melt residence time.
Gate design is the primary process variable controlling connector retention performance. Tunnel or submarine gate diameter should be at least 0.8 mm with land length between 0.6 mm and 1.0 mm to avoid high-shear fibre breakage at the gate entry. Sequential valve-gated hot-runner systems are used to shift weld lines away from the retainer flexural hinge and the barb root, because carbon fibres align parallel to the flow front at knit lines and reduce local transverse tensile strength. When cold runners are used, runner diameter is oversized against the wall thickness by 20–30 % to maintain a full melt channel. Moulded quick connectors, retainer caps, fuel-line clips, and port fittings are then assembled onto PA12 or PA6/PA12 multi-layer tubing and tested to SAE J2044 for retention force, ISO 527-2 for tensile properties, ISO 178 for flexural strength, and SAE J2260 for evaporative fuel permeation. Regrind is limited to 15–25 wt% of the shot only after melt volume-flow rate under ISO 1133-1:2022 remains within ±10 % of virgin compound. The material should not be exposed to concentrated formic acid, phenol solvents, or heated zinc chloride solutions above 50 °C.
| Qualification dimension | Test method | Relevant condition | Typical failure mode screened |
|---|---|---|---|
| Retention force after fuel exposure | SAE J2044 | Thermal cycling and fuel soak | Connector-to-tube separation |
| Hydrocarbon permeation | SAE J2260 | SHED evaporative emission cycle | Permeation leak path |
| Tensile modulus and strength | ISO 527-2 | Dry-as-moulded and conditioned | Barb root tensile overload |
| Flexural strength | ISO 178 | 23 °C span-to-thickness ratio | Housing crack under assembly load |
| Notched Charpy impact | ISO 179-1/1eA | −30 °C | Low-temperature brittle failure |
In pneumatic powder transfer lines, the compound is used for elbows, coupling flanges, grounding collars, filter housing end caps, and blow-back nozzles where static accumulation can ignite combustible dust suspensions. Electrostatic discharge qualification is performed according to IEC 61340-5-1, with surface resistance measured by IEC 60093 and volume resistivity by IEC 62631-3-2. For process equipment in ESD-protected areas, surface resistance to ground is normally required to fall between 104 and 109 Ω; the fixed 15 wt% carbon-fibre phase in PA12 provides static-dissipative behaviour only when the conductive fibres are in continuous contact through the skin layer. This makes weld-line placement, fibre orientation, and moulded-skin retention more important than bulk carbon content alone. Injection moulding with gate size below 0.8 mm can produce a resin-rich surface layer that increases apparent surface resistance above the allowed upper limit. Flow length-to-thickness ratios above 100 create anisotropic resistivity; the same part can pass in the flow direction and fail transverse to flow if the knit line is located between grounding point and the opposite end.
Production-scale validation therefore includes surface resistance mapping over the finished part after conditioning at 23 °C and 50 % RH, rather than relying on a single coupon value. Moulding parameters follow the same drying and screw-speed limits as the automotive connector application, but back pressure is held at the upper end of the 2–5 MPa range to disperse carbon fibres and reduce resin pooling. Grounding lugs and bushings are assembled mechanically into the moulded body after removal of any surface release agent; silicone-containing external mould releases should be avoided because they can create an insulating film on the surface. Terminal parts are specified for powder conveying lines handling flour, starch, polymers, and fine metal powders, but not for high-abrasion media that rapidly remove the conductive fibre-rich skin layer. After field start-up, surface resistance is re-tested at grounding points; if resistance exceeds 109 Ω, the part is replaced or reconditioned. The compound itself does not require an external conductive coating when the moulded surface remains intact.
In lithium-ion battery thermal management loops, connectors, pass-through fittings, and venting taps are moulded from the same 15 wt% carbon-fibre-reinforced PA12 when coolant contact resistance and dimensional stability after hot ethylene glycol/water exposure are more critical than high strain at break. The as-supplied compound is processed after the same drying protocol of 80 °C for 4–8 h. Melt preparation uses barrel settings between 250 °C and 280 °C, and mould temperature is elevated to 80–90 °C to reduce post-mould crystallisation gradients around barbed geometry. Because the carbon fibres render the moulded material opaque in the near-infrared, laser transmission welding is not suitable; hot-plate welding, ultrasonic welding, or heated-tool staking is used for joint closure. The design must avoid sharp internal corners below 0.5 mm radius in barb roots because carbon-fibre-filled PA12 shows lower notch ductility than unreinforced PA12. Qualification is performed according to ISO 16750-4 for thermal load and coolant exposure, with tensile retention measured under ISO 527-2 after immersion in the intended coolant mixture. Water-glycol ratios of 50/50 by volume are common, but silicate-containing or sulfated inhibitor packages can shift pH and change degradation kinetics; published data for this specific configuration is limited, so end users validate each coolant formulation. Terminal parts include quick connectors on coolant lines, heating system inlets, battery case pass-through couplings, and purge vent fittings.
| Coolant qualification test | Method / standard | Moulded specimen | Primary failure mode screened |
|---|---|---|---|
| Hot coolant aging | ISO 16750-4 | Tensile bars and assembled fittings | Hydrolytic embrittlement |
| Tensile property retention | ISO 527-2 | As-moulded and aged bars | Loss of barb retention force |
| Dimensional reading after water-glycol soak | ISO 62 | Plate specimens | Diametral expansion of bore |
| Pressure cycle resistance | ISO 16750-4 | Fittings on coolant line assembly | Fatigue cracking at weld joint |
When dry-running conveyor wear strips, chain guides, and transfer star inserts operate under sustained mechanical load, the compound is selected for a lower friction coefficient and higher stiffness than unreinforced PA12, not as a direct replacement for filled PEEK or polyketone. The 15 wt% carbon-fibre phase increases thermal diffusivity and reduces the surface-temperature rise at the sliding interface; however, the matrix still retains the moisture-absorption character of PA12. Wear factor is measured by thrust washer method under ASTM D3702 or pin-on-disc screening under ISO 7148 with a stainless-steel counterface hardened above 50 HRC. Published quantitative wear factors for this specific configuration are limited; therefore, qualification for a given speed and contact pressure is run on the actual moulded or machined surface rather than on a polished test specimen. Moulded wear strips retain a resin-rich skin layer with lower initial break-in friction, whereas machined edges expose carbon-fibre ends and show higher friction until the transfer film develops. The processing route matters: extruded plate is annealed and slow-machined to minimise microcracks; injection-moulded profiles are gated along the length to orient fibres parallel to the wear path. Mounting slots and bolted joints are placed away from the sliding face, because carbon-fibre-filled PA12 is more notch-sensitive after moisture conditioning than unreinforced PA12. Clearance allowances should account for post-mould dimensional increase in humid air; running clearance below 0.2 mm on a 500 mm rail length can bind when the strip absorbs moisture. Terminal parts include chain guides, bottle transfer star slots, wear rails, and positioning inserts in packaging and printing machines, but not direct food-contact surfaces unless the end user obtains separate food-contact certification for the specific moulded part.
Flexible offshore pipe liners for oil and gas transfer use a PA12 pressure sheath when the service fluid contains hydrocarbons, carbon dioxide, or hydrogen sulfide below the concentration limits of the grade. The carbon-fibre-reinforced compound is used as a static-dissipative inner layer or as part of a multi-layer liner system, not as the sole pressure-containing layer at high burst pressure. The molten material is extruded in single-screw lines with L/D of 25:1 or greater, using barrier screws and melt filtration at 50–100 µm aperture to remove char and agglomerates. Barrel temperature is set from 240 °C to 270 °C, and vacuum venting is maintained below 50 mbar during plastication to limit hydrolysis and void formation. The carbon-fibre content raises melt pressure compared with unreinforced PA12, so throughput is derated by 15–25 % relative to pure PA12 of equivalent melt-flow rate. Qualification is performed under API 17J and ISO 13628-2 for flexible pipe systems, with non-metallic material qualification according to NORSOK M-710 for sour service and rapid gas decompression. The operational boundary is important: at low service temperatures below −30 °C, carbon-fibre-filled PA12 may show reduced impact toughness, and dynamic riser applications require additional fatigue testing because published data for this exact configuration is limited. Finished products include inner liners, static-dissipative wear layers, and gas-tight sheath segments for subsea production jumpers and utility lines.
Competitive Evonik Vestamid L-GB30 15% Carbon Fiber Filled Nylon 12 prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615365186327 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8615365186327
Email: admin@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Material selection for dimensionally stable polyamide 12 components requires careful resolution of filler nomenclature before mould trials are authorized. The product data string “Evonik Vestamid L-GB30 15% Carbon Fiber Filled Nylon 12” contains two distinct reinforcement claims. Under ISO 1043-1:2011, the designation L-GB30 identifies a polyamide 12 matrix containing 30% by mass glass beads; the additional 15% carbon fiber descriptor is not present in the standard catalogue datasheet for Vestamid L-GB30. Published Evonik technical literature for Vestamid L-GB30 describes a 30% glass-bead-reinforced PA12 compound with a density of approximately 1.24 g/cm³ when tested to ISO 1183-1. Where a 15% carbon fiber-filled PA12 is required, the corresponding catalogue grade is normally Vestamid L-CF15. A custom lot, distributor relabel, or legacy specification may therefore be indicated, and the lot-specific certificate of analysis must be used to confirm filler contents, matrix viscosity, and electrical performance before tooling or process validation proceeds.
The introduction of 15% carbon fiber into a 30% glass-bead-filled PA12 matrix shifts the conductivity mechanism from bulk insulation to at least surface dissipation if the carbon fiber network percolates. Published data for this specific hybrid configuration is limited; however, short carbon fiber loading in semicrystalline polyamide matrices typically produces surface resistivity in the range 103–109 Ω when measured to IEC 62631-3-2, depending on fiber length, orientation, and shear history. The glass beads continue to provide isotropic spatial distribution but do not contribute to electron transport. Carbon fiber at 15% also raises tensile modulus and tensile strength, reduces tensile strain at break, and lowers the coefficient of linear thermomechanical expansion relative to unfilled PA12. Glass beads alone, by contrast, produce only moderate stiffening and retain comparatively high elongation. The combined filler system therefore creates an asymmetric property profile: a low-warpage base morphology from glass beads with higher load-bearing capacity and electrostatic dissipation from carbon fiber. Weld-line strength is reduced by high aspect-ratio carbon fiber orientation at melt fronts, and this effect must be evaluated with double-gated test plaques under ISO 527-1/-2 or ISO 8256 depending on the failure mode of interest. Because the percolation threshold for carbon fiber in polyamide 12 is influenced by filler wetted length, processing temperature, and shear rate, the same nominal 15% carbon fiber addition can produce different surface resistivity values in thick-walled and thin-walled sections.
Before melt processing, moisture must be reduced below 0.10% by weight to prevent hydrolytic degradation. Desiccant drying at 80°C for 4–12 h in a dryer with a dew point of −30°C or lower is standard for PA12 compounds; moisture is verified according to ISO 15512. On injection moulding lines, barrel temperatures from 230°C to 260°C and mould temperatures from 40°C to 80°C are typical for filled PA12. The melt should not exceed 280°C for extended residence times because thermal oxidative chain scission reduces molar mass and impact strength. A vented twin-screw extruder with an L/D ratio of 32:1 to 44:1 and vacuum pressure of −0.08 MPa is used for compounding or reprocessing. Hot-runner manifolds should avoid dead spots; residence time in the barrel should be kept below 10 min at elevated temperatures. Injection pressure is typically 60–100 MPa, with packing pressure 40–70 MPa and hold time set by gate seal calculations from part wall thickness and melt compressibility.
Standard catalogue grades available from Evonik permit a direct comparison of filler effect. Table 1 lists representative published values for unfilled Vestamid L, Vestamid L-GB30, and Vestamid L-CF15. All values are dry-as-moulded unless noted. The data illustrate the structural difference between glass bead reinforcement and carbon fiber reinforcement at equivalent matrix chemistry.
| Property | Test method | Vestamid L | Vestamid L-GB30 | Vestamid L-CF15 |
|---|---|---|---|---|
| Density | ISO 1183-1 | 1.01 g/cm³ | 1.24 g/cm³ | 1.06–1.08 g/cm³ |
| Tensile modulus | ISO 527-1/-2 | 1500 MPa | 1800–2200 MPa | 9000–11000 MPa |
| Tensile strain at break | ISO 527-1/-2 | >200% | 15–25% | 2.5–4.0% |
| Charpy notched impact strength | ISO 179-1/1eA | 5–7 kJ/m² | 5–8 kJ/m² | 4–6 kJ/m² |
| Melting peak | ISO 11357-3 | 176–180°C | 176–180°C | 176–180°C |
| Surface resistivity | IEC 62631-3-2 | 1013–1014 Ω | 1013–1014 Ω | 103–109 Ω |
Glass beads provide a nearly isotropic shrinkage response because the spherical filler does not have a dominant flow-induced orientation. Carbon fiber at 15% produces uniaxial orientation in the flow direction, reducing mould shrinkage in that direction but increasing differential shrinkage between flow and transverse axes. Tooling trials should include shrinkage plaques measured to ISO 294-4 at 24 h and 48 h after demoulding. The L-GB30 grade is selected where flatness and roundness are critical; L-CF15 is selected where specific stiffness and electrostatic dissipation are required. A hybrid formulation, if truly present, must be evaluated on a custom basis because standard database values are not sufficient for tooling compensation.
Low-warpage housings with multi-cavity tools and variable wall thickness create differential flow orientation. Short glass fibers in L-GF30 produce high modulus but anisotropic shrinkage and warpage; carbon fibers in L-CF15 produce even higher modulus but also strong orientation and conductivity. Glass beads in L-GB30 generate lower aspect ratio and more uniform packing, reducing differential shrinkage. However, L-GB30 has lower stiffness than L-GF30 and L-CF15. In applications where dimensional stability is the primary requirement and static loads are moderate, glass bead reinforcement is selected. If load-bearing capacity or electrostatic dissipation is required, carbon-fiber-filled PA12 may be selected with tooling compensation for orientation, or a hybrid system may be specified with appropriate weld-line and impact validation. For automotive housings and electrical enclosures, roundness and flatness after 48 h conditioning at 23°C and 50% RH are often the governing acceptance criteria, measured on coordinate measurement equipment with reference points per drawing datum system.
Polyamide 12 has lower water absorption than polyamide 6 or polyamide 66. Under ISO 62, PA12 reaches about 0.7% moisture at 23°C and 50% RH and about 1.1% at saturation. The 30% glass bead filler volume fraction reduces the linear expansion contribution of moisture because the glass beads do not swell; dimensional change is proportional to matrix swelling and filler restraint. The glass transition of dry PA12 is near 40°C, and absorbed water plasticizes the matrix, which lowers modulus and increases impact toughness. Heat distortion temperature measured to ISO 75-2/B at 0.45 MPa is typically 100–120°C for L-GB30. Long-term continuous service above 90°C in air requires antioxidant evaluation; glass beads are stable but the matrix is susceptible to oxidative degradation. If the material is processed with residual moisture above 0.10%, the resulting hydrolytic degradation reduces molecular weight and produces a measurable shift in torque during compounding and barrel pressure during injection moulding.
Standard L-GB30 datasheets support most technical reviews. Once a 15% carbon fiber claim is added to the designation, the material is outside the standard catalogue specification unless the supplier issues a controlled document. Required documentation includes certificate of analysis for filler content, base resin viscosity number to ISO 307, tensile and impact properties to ISO 527-1/-2 and ISO 179-1/1eA, surface resistivity to IEC 62631-3-2, and shrinkage data to ISO 294-4. Regulatory compliance for EU markets requires REACH registration for the imported lot, RoHS 2011/65/EU for electrical and electronic applications, and possibly UL 94 documentation at the end-use wall thickness. Standard PA12 grades are not food-contact compliant by default; FDA 21 CFR 177.1500 or EU Regulation (EU) No 10/2011 compliance must be stated in writing for each lot. Avoid combining the material with amine-based processing aids or strong oxidizers at elevated temperatures because these can accelerate degradation. If the filler system is not verified, published data for this specific configuration is limited, and tooling should not be cut from equivalent-grade assumptions.
