| HS Code | 300596 |
| Material | PET-G with 15% carbon fiber |
| Carbon Fiber Content | 15% |
| Color | Black |
| Filament Diameter | 1.75 mm |
| Diameter Tolerance | ±0.05 mm |
| Net Weight | 750 g |
| Density | 1.29 g/cm³ |
| Print Temperature | 240-260°C |
| Bed Temperature | 70-80°C |
| Tensile Strength | 60 MPa |
| Tensile Modulus | 6.0 GPa |
| Elongation At Break | 2.0% |
| Flexural Strength | 100 MPa |
| Flexural Modulus | 7.0 GPa |
| Heat Deflection Temperature | 75°C |
| Nozzle Requirement | Hardened steel |
| Drying Temperature | 80°C |
| Drying Time | 4-6 hours |
As an accredited Mitsubishi CARBON-P PET-G, 15% Carbon Fiber Filled 3D Printing Filament factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Spool of Mitsubishi CARBON-P PET-G, 15% carbon fiber filled 3D printing filament, 1 kg, vacuum-sealed with desiccant in a box. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with Mitsubishi CARBON-P PET-G, 15% carbon fiber filled 3D printing filament, palletized, moisture-protected, secured for ocean freight. |
| Shipping | Shipping: Mitsubishi CARBON-P PET-G, 15% Carbon Fiber Filled 3D Printing Filament is supplied on spools, vacuum-sealed in moisture-barrier bags with desiccant, then boxed. It is non-hazardous, ships at ambient temperature with no special transport restrictions. Keep dry, cool, and out of direct sunlight. Store sealed until use. |
| Storage | Store Mitsubishi CARBON-P PET-G, 15% Carbon Fiber Filled 3D Printing Filament in a cool, dry, well-ventilated place at 15–25°C, away from heat, sunlight, and ignition sources. Keep in original sealed packaging or an airtight container with desiccant. Maintain low humidity to prevent moisture absorption, which may degrade print quality. Avoid dust and chemical contamination. Dry before use if exposed. |
| Shelf Life | Shelf life is typically 12 months if unopened and stored cool, dry, sealed; PET-G absorbs moisture, dry before use. |
Mitsubishi CARBON-P PET-G, a glycol-modified polyethylene terephthalate filament filled with 15 wt% discontinuous carbon fibre, is converted into cabin and low-load engine-bay brackets, connector retainers, cable clips, and sensor mounts by fused-filament extrusion. The filament must be dried at 65 °C for 4–6 h in a desiccant dryer maintaining a dew point below −20 °C; undried PET-G reaching 0.02 wt% residual moisture hydrolyzes at the 250–270 °C extrusion temperature, producing surface splay, microvoids, and reduced interlayer fusion. At ambient relative humidity above 60%, the filament absorbs moisture within 2 h and must be re-dried before extrusion. A hardened nozzle with a minimum 0.5 mm orifice diameter is specified because carbon fibre abrades brass; on a 0.4 mm brass nozzle, orifice enlargement of 15–25 µm after approximately 1 kg of feedstock has been observed in production runs, altering extrusion width and causing dimensional drift. The bed is held at 70–80 °C and the part is printed at 40–60 mm/s with 5 perimeters and 60% gyroid infill to reduce anisotropic contraction. Cabin components must satisfy FMVSS 302 horizontal burn-rate requirements and, when specified by a German OEM, VOC/FOG limits under VDA 278; the material does not carry a UL 94 V-0 rating and must not be placed adjacent to high-voltage carriers or exhaust-adjacent zones. Continuous service above 75 °C is outside the verified envelope for this specific configuration because the matrix loses stiffness and carbon fibre does not raise the heat distortion temperature into underhood-high-temperature territory. Finished parts include diagnostic connector brackets, HVAC blend-door clip assemblies, and low-mass cowl trim retainers.
Short-fibre reinforcement at 15 wt% is suitable for UAV motor cages, gimbal plates, antenna brackets, and camera isolation mounts only when the design treats FDM anisotropy as a first-order constraint. Tensile and flexural values obtained on injection-moulded ISO 527-2/1A/50 coupons fall in the 3.5–4.5 GPa range for typical 15% CF-PETG compounds; FDM parts printed with 0.15 mm layer height and 100% concentric infill around bosses may retain 80–90% of the XY-plane modulus but only 45–60% in the Z direction when tested according to ASTM D638-14 with the load applied across layers. Motor cages therefore require heat-stake threaded inserts installed at 180–200 °C; self-tapping threads directly into printed PET-G fail by layer-line cracking under 30 Hz rotor vibration. Extrusion temperature is held at 260–280 °C with a 0.5 mm hardened steel nozzle; bed adhesion is improved at 75 °C on a PEI surface. Published fatigue data for this specific filament configuration are limited, so rotor-bearing bores should be reamed after stress-relief annealing at 60 °C for 2 h, and the part inspected for delamination after every 50 flight hours using ISO 179-1/1eA impact-testing criteria if impact resistance is a design requirement. Components produced include motor-mount cages, gimbal isolation plates, and GPS-antenna mast brackets; primary structural wing spars and motor pylons are excluded because the carbon fibre is discontinuous and the matrix is not notch-insensitive at −20 °C.
In low-volume production cells, assembly fixtures, CMM part stops, robotic end-of-arm fingers, and drill-jig bushings are printed from carbon-fibre-filled PET-G at 6 perimeters and 80% rectilinear infill after eliminating sparse infill near locating features. Dimensional stabilization requires conditioning at 23 °C and 50% RH for 72 h under ISO 291; the amorphous matrix reduces the severe curling associated with unfilled PET and PA6, but 15 wt% carbon fibre produces anisotropic contraction of 0.04–0.08% from as-printed to conditioned state, so locating bores are not used directly from the print. The fixture is stress-relief annealed at 60 °C for 4 h and then drilled or reamed to H7 tolerance; pressed dowel pins are retained in printed bosses only when the boss wall thickness is 8 mm and the perimeter count is 8 or higher. Adhesive bonding for gripper pads must avoid amine-based primers because the ester linkages in PET-G are susceptible to alkaline amine attack, reducing surface molecular weight. For vacuum-cup gripper fingers, the material exhibits lower moisture uptake than PA6 under 50% RH, reducing dimensional swell in changing plant humidity, but its surface hardness is insufficient for abrasive contact with cast aluminium edges; hardened steel wear pads are recommended. The continuous service ceiling under loaded fixture conditions remains below 70 °C, verified by ASTM D648-18 at 0.45 MPa; above this threshold creep in the PET-G matrix allows clamp force loss and positional drift. Compliance for general industrial tooling is maintained under RoHS 2011/65/EU as amended by EU 2015/863 and REACH 1907/2006; no food-contact claim applies. Terminal artefacts include CMM fixture stops, robotic gripper jaws for non-abrasive parts, and drill-jig bushings for pilot drilling polymer panels.
Carbon-fibre-filled PET-G is sometimes specified for electronics housings, camera rig plates, VR headset structural clips, and drone controller internal frames on the assumption that carbon fibre guarantees static dissipation. That assumption is not valid at 15 wt% loading without batch-level verification. Surface resistance measured under ANSI/ESD STM11.11 on conditioned prints typically falls between 1×107 and 1×1010 Ω, with the lower end appearing only when fibre-rich surface regions are continuous and unmachined; the dissipative range defined by IEC 61340-5-1:2016 is 1×105 to 1×109 Ω. Printing with a 0.6 mm hardened nozzle at 260 °C and 3 solid perimeters increases sidewall conductivity slightly, but top and bottom surfaces often remain more resistive because the carbon fibre aligns in the XY plane and is buried under a polymer-rich skin. For an electronics enclosure, the material can be used only after measuring surface resistance on product-representative coupons and verifying that the entire part family remains within the dissipative range; otherwise it must be treated as an insulator. Flame performance is limited to UL 94 HB; the matrix does not possess a V-0 or V-2 rating, so enclosure designs needing flame-rated barriers must select FR-ABS or FR-PC instead. Compliance is evaluated under RoHS 2011/65/EU as amended and REACH 1907/2006; the carbon fibre content does not exempt the part from battery-related enclosure tests. Terminal components include drone controller internal frames, camera cage side plates, and VR headset structural clips where flame certification is not mandatory.
| Application domain | Standard designation | Test method / clause | Verification requirement |
|---|---|---|---|
| Automotive cabin | FMVSS 302 | Horizontal burn rate, 356 mm test length | ≤ 102 mm/min or self-extinguishing |
| Automotive cabin | VDA 278 | Thermal desorption, VOC/FOG | OEM limit; verify target specification |
| Electronics enclosure | IEC 61340-5-1:2016 | ANSI/ESD STM11.11 surface resistance | 1×105 to 1×109 Ω dissipative |
| Electronics enclosure | UL 94 | 20 mm vertical burn | HB minimum; V-0 requires FR grade |
| External orthosis | ISO 10993-5:2009 | MEM elution cytotoxicity | ≥ 70% viability |
| External orthosis | ISO 10993-10:2010 | Skin irritation/sensitization | Grade 0 or 1 erythema/edema |
| Bicycle accessory | ISO 4210-5:2014 | Fatigue loading | No visible crack in production-representative coupon |
For external orthotic prototypes, AFO trial shells, and prosthetic check sockets, carbon-fibre-filled PET-G reduces iteration time relative to laminated composite construction. The material is considered suitable only for short-term external devices with indirect or liner-protected patient contact; exposed carbon fibre on the inner surface can produce mechanical skin irritation, and the compound has not been cleared as a finished medical-grade material under ISO 10993-1 unless the responsible manufacturer completes full biocompatibility screening. Cytotoxicity is evaluated using ISO 10993-5:2009 MEM elution testing on the printed article, not on raw filament, and irritation or sensitization potential is assessed under ISO 10993-10:2010; a result of grade 0 or grade 1 for erythema and edema is the usual acceptance criterion for limited skin contact. AFO trial shells are printed with 3 mm wall thickness, 5 perimeters, and 40% triangular infill at 250 °C with a 0.5 mm hardened nozzle; the bed is held at 75 °C and the shell is stress-relief annealed at 60 °C for 3 h after removal to reduce residual stress before fitting. The continuous load-bearing capacity is lower than a laminated carbon/epoxy AFO, so printed structures are used for gait trial devices and short-term check sockets rather than definitive load-bearing orthoses. Finished articles include prosthetic check sockets, AFO test shells, and orthotic positioning jigs.
Custom bicycle handlebar accessory mounts, action-camera brackets, and training-equipment adapters are extruded from carbon-fibre-filled PET-G where the design load is static or low-cycle rather than structural. The printed part must not replace load-bearing frame or fork components; ISO 4210-5:2014 fatigue and impact requirements for bicycle parts exceed the impact and crack-propagation resistance of 15 wt% CF-PET-G in Z-axis loading. Mechanical validation for accessory brackets uses ISO 179-1/1eA notched Charpy impact testing and ASTM D790-17 flexural testing on specimens printed in the same orientation as the final part; Z-direction flexural strength may be 35–50% lower than XY-direction strength, so bracket geometry must orient the primary bending load in the XY plane. Mounts are printed at 260–270 °C with 0.2 mm layer height, 100% infill in boss regions, and 4 solid perimeters; metal threaded inserts are heat-staked at 180–200 °C for camera screws and accessory studs. UV exposure degrades unreinforced PET-G over time; for outdoor cycling parts, a UV-stable coating or black pigmentation is applied, and the part is inspected for surface crazing after 500 h of ISO 4892-2 xenon-arc exposure if outdoor durability is claimed. Terminal components include handlebar action-camera mounts, saddle rail adapters for tail-light brackets, and gym equipment tablet holders; structural seatposts, stems, and handlebars are excluded from the verified performance envelope.
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Compounded with 15% by weight short carbon fiber in a PET-G matrix, Mitsubishi CARBON-P PET-G is a 3D printing filament intended for material extrusion systems requiring higher stiffness than unfilled PET-G and lower moisture sensitivity than carbon fiber filled PA6. The product designation CARBON-P PET-G identifies the matrix and filler system; the filament is available in nominal 1.75 mm and 2.85 mm diameters. Industrial spool documentation for this product class commonly states a diameter tolerance of ±0.05 mm, but procurement should require lot-specific certification. The short carbon fiber loading is dispersed during twin-screw compounding; fiber attrition in co-rotating twin-screw extruders with L/D ratios of 32:1 to 44:1 can reduce mean fiber length below the nominal chopped fiber input. The filament is hygroscopic and must be dried at 65 °C for 4–6 h before processing. Product-specific data for the Mitsubishi grade is more limited than for unfilled PET-G; where exact values are required, the manufacturer certificate of analysis should govern.
The filler network increases melt viscosity, which narrows the practical extrusion window relative to unfilled PET-G. A direct-drive extruder with hardened steel, nickel-plated hardened steel, or tungsten carbide drive gears is required because the 15 wt% fiber load abrades brass feed components and nozzles. The orifice wear mechanism is progressive: within 0.5–2 kg of processed filament, brass nozzle bores can expand enough to alter extrusion width and reduce pressure control. Nozzle set temperature is typically 240–260 °C, with production-floor data from similar grades showing that the stable process window can be as narrow as ±5 °C. Below 230 °C, incomplete fiber wet-out creates localized viscosity peaks and increases the probability of clogging in nozzles smaller than 0.4 mm. Above 270 °C, PET-G matrix degradation through chain scission produces brown discoloration and reduces interlayer weld strength. Bed adhesion is maintained at 70–80 °C on PEI, polycarbonate, or textured glass surfaces. A heated chamber is not mandatory; however, a chamber temperature of 30–45 °C improves dimensional stability in parts with long continuous extrusions. Retraction distance should be reduced by 0.5–1 mm compared with unfilled PET-G to prevent fiber-rich plugging in the cold transition zone. Extrusion multiplier calibration should be performed with a hollow test cube; fiber-filled grades often require volumetric flow compensation because the carbon fiber reduces melt compressibility and changes die swell.
Fiber-rich filament responds differently to retraction and linear advance. In production runs on direct-drive extrusion systems with tungsten carbide drive gears, retraction of 1–2 mm at 20–30 mm/s is common for 0.4–0.6 mm hardened steel nozzles; values above 3 mm can pull fiber-rich melt into the cold zone and create a plug. For Bowden systems, the longer retraction path increases the risk of buckling because the filament is stiffer than unfilled PET-G. A PTFE guide tube with inner diameter 2.0 mm for 1.75 mm filament reduces friction. Print speeds of 30–60 mm/s are typical for dimensional accuracy; speeds above 80 mm/s may reduce fiber alignment and increase surface roughness.
In low-volume assembly fixtures, robotic gripper fingers, and inspection holding tools, the carbon fiber filled PET-G is selected when flexural stiffness and dimensional repeatability dominate design requirements. Representative material-class properties measured by ISO 178 place flexural modulus between 3.5–5.5 GPa, roughly double the 2.0–2.5 GPa expected from unfilled PET-G. The gain in stiffness is accompanied by a drop in elongation at break below 5% under ISO 527-2; snap-fit details and high-strain hinges are therefore outside the reliable operating envelope. Compared with carbon fiber filled PA6, the PET-G grade exhibits lower moisture regain and reduced open-chamber warpage, but its heat deflection temperature is lower and it does not match PA6-based compounds in sustained elevated-temperature service. Dimensional stability is improved over unfilled PET-G because short carbon fiber reduces the coefficient of thermal expansion and restrains shrinkage during solidification. On prints with aspect ratios up to 3:1, warpage is less severe than with unfilled PET-G when a 0.5 mm hardened steel nozzle is used. The material is not a static-dissipative compound by default; surface resistivity data for the specific Mitsubishi configuration is limited and should not be inferred from carbon fiber content alone.
The table below summarizes representative material-class values for the 15% carbon fiber filled PET-G product category, unfilled PET-G, and carbon fiber filled PA6 benchmarks. The values are not procurement specifications for the Mitsubishi product; they are compiled from publicly reported material class data and standard test methods. For design allowables, the manufacturer certificate of analysis should be used. Tensile values reported under ISO 527-2 and ASTM D638-14 are not interchangeable because specimen geometry and extension rate differ.
| Property | 15 wt% CF PET-G | Unfilled PET-G | 15 wt% CF PA6 | Test method |
|---|---|---|---|---|
| Density | 1.25–1.30 g/cm³ | 1.26–1.28 g/cm³ | 1.15–1.22 g/cm³ | ISO 1183 |
| Tensile strength | 45–60 MPa | 45–50 MPa | 80–120 MPa | ISO 527-2 |
| Tensile modulus | 3.5–5.0 GPa | 2.0–2.5 GPa | 6.0–9.0 GPa | ISO 527-2 |
| Flexural modulus | 3.5–5.5 GPa | 2.0–2.5 GPa | 5.5–8.0 GPa | ISO 178 |
| Elongation at break | 2–5% | 15–30% | 2–5% | ISO 527-2 |
| Heat deflection temperature, 0.45 MPa | 75–85 °C | 70–75 °C | 140–180 °C | ISO 75-2 |
Surface roughness of the printed material is higher than unfilled PET-G because exposed fiber ends remain after deposition. Sanding to 240 grit or applying an epoxy-based coating reduces the roughness for inspection fixtures where tactile slip is undesirable. The carbon fiber filler also lowers gloss and changes the visual texture differently than glass-filled compounds. Notched impact strength of the carbon fiber filled PET-G class is lower than unfilled PET-G; values are typically in the 3–7 kJ/m² range under ISO 180 or ASTM D256, which restricts dynamic loading.
When a machined aluminum tool is replaced by the carbon fiber filled PET-G, the resulting mass is approximately 45–50% lower because the compound density of 1.25–1.30 g/cm³ is below half that of aluminum at 2.70 g/cm³. This substitution is limited to non-structural tools because the tensile modulus of the polymer compound is in the 3.5–5.0 GPa range, whereas aluminum alloys such as 6061-T6 typically show 68–72 GPa. The polymer tool can be used where deflection under working load is acceptable above 0.25 mm and where continuous service temperature remains below the heat deflection temperature at the relevant stress. Aluminum replacement also changes thermal conductivity: the polymer tool does not conduct heat like aluminum, which is an advantage where thermal isolation is desired but a disadvantage where heat transfer from the part to the fixture is required. Machined features are possible; carbide or diamond-coated rotary tools are recommended. Direct tapping into printed bosses with less than 60% infill is not reliable. Threaded brass or stainless steel inserts installed at 200–220 °C provide repeatable assembly points. The material is not a drop-in replacement for metal in high clamp-force or safety-critical load paths.
Tensile data from XY-printed specimens do not represent the through-thickness behavior of a material extrusion part. The chopped carbon fiber orients preferentially in the extrusion direction during nozzle shear, creating anisotropic mechanical properties. Flat specimens printed with a 0° raster and tested under ISO 527-2 show the highest strength and modulus; specimens printed with 90° raster display lower transverse properties because stress transfer depends on raster-to-raster weld lines. Through-thickness tensile values are commonly 40–60% of the XY value for carbon fiber filled PET-G, although published data for this specific configuration is limited. The reduction is caused by incomplete interlayer diffusion at the lower processing temperature and by fiber-induced surface roughness that weakens the weld interface. For load-bearing fixtures, build orientation should place principal tensile stress along the raster direction rather than across layers. In unsupported overhangs above 45°, the fiber-loaded material can show more visible surface tearing than unfilled PET-G.
Moisture absorption of the PET-G matrix is lower than that of PA6 but remains process-critical. Equilibrium moisture in unfilled PET-G at 50% relative humidity is approximately 0.2–0.4%; the carbon fiber loading does not eliminate the matrix absorption. During melting, residual moisture hydrolyzes the PET-G backbone, generating gaseous byproducts that appear as nozzle voids, stringing, and reduced interlayer adhesion. Spools should be stored in sealed containers with desiccant to keep headspace relative humidity below 20%. When moisture exposure is suspected, drying at 65 °C for 4–6 h in a dryer with a dew point below -20 °C is required. Drying at temperatures above 70 °C for more than 8 h risks deforming plastic spools. Filament diameter should be monitored with a dual-axis laser micrometer at the start and middle of the spool to detect fiber-induced diameter fluctuation. If a spool has remained unsealed for more than 48 h at relative humidity above 60%, pre-drying before production is mandatory.
Post-processing operations are feasible but require abrasion-resistant tooling. Carbide or diamond-coated rotary tools are recommended for subtractive finishing; high-speed steel tooling dulls rapidly when cutting the 15 wt% carbon fiber. Sanding with 120–240 grit aluminum oxide paper removes layer lines; finer grits should be used before bonding. Drilling with low spindle speed and peck cycles reduces delamination at exit surfaces. Adhesive bonding with cyanoacrylate or two-part epoxy is generally effective after abrasion, but the carbon fiber surface can reduce the activity of some solvent-based primers. Threaded inserts installed at 200–220 °C provide more reliable assembly points than direct threaded holes. Solvent vapor smoothing is not recommended because PET-G has limited solubility in common vapor smoothing solvents and exposed fiber ends can become more visible after partial surface dissolution.
Operational boundaries for the carbon fiber filled PET-G include continuous service below the heat deflection temperature under load, avoidance of food-contact use unless the manufacturer explicitly confirms FDA 21 CFR 177.1630 compliance on lot documentation, and verification of regulatory status under REACH 1907/2006 and RoHS 2011/65/EU through supplier declarations. The compliance matrix below reviews mandatory verification points for regulated applications:
| Regulatory area | Standard or directive | Required verification |
|---|---|---|
| Hazardous substances in electrical and electronic equipment | RoHS 2011/65/EU | Supplier declaration with lot traceability |
| Substances of very high concern | REACH 1907/2006 | Article 33 disclosure if applicable |
| Food contact | FDA 21 CFR 177.1630 | Explicit manufacturer confirmation required |
| Flammability classification | UL 94 | Test report required if end-use classification is mandatory |
Against carbon fiber filled PA6, the product offers lower moisture uptake and better dimensional stability on open-platform machines, but it operates at lower continuous temperature and may not match the tensile strength of PA6 compounds. The material also differs from glass fiber filled PET-G by providing higher stiffness and a marginal density reduction, but the carbon fiber filler increases nozzle wear and may introduce electrical conductivity concerns in sensitive electronics housing. These boundaries define the substitution space rather than a general-purpose replacement for unfilled PET-G.
