Aug. 11, 2026
PEEK CF30 granules are a pelletized polyether ether ketone compound reinforced with approximately 30% carbon fiber by weight. I use the term “CF30” to describe a filled PEEK grade intended to improve stiffness, dimensional stability, creep resistance, and wear performance compared with unfilled PEEK. These granules are processed by high-temperature injection molding, compression molding, or other suitable thermoplastic methods, depending on the grade and component design. The exact mechanical values, fiber length, thermal limits, color, and processing window must be confirmed in the supplier’s technical data sheet before purchase.
For B2B buyers, the central selection question is not simply whether a material contains 30% carbon fiber. I recommend evaluating the base PEEK resin, fiber type and distribution, reinforcement percentage, flow behavior, moisture condition, regulatory requirements, and consistency between production lots. A qualified compound supplier should provide a technical data sheet, processing guidance, sample material, and technical support for mold and process validation.
PEEK CF30 granules are small polymer pellets made from PEEK resin compounded with carbon fibers. PEEK is a semi-crystalline, high-performance thermoplastic with a glass-transition temperature of approximately 143°C and a melting temperature commonly reported near 343°C for standard PEEK resin. The carbon-fiber reinforcement changes the stiffness, thermal expansion, electrical behavior, flow characteristics, and anisotropy of the finished part.
The “30” in CF30 generally indicates a nominal 30% carbon-fiber content, normally expressed by weight. However, naming conventions can differ between manufacturers, so I recommend checking whether the percentage is stated as weight fraction, whether the material is short-fiber reinforced, and whether the grade includes additional additives such as lubricants, wear modifiers, or conductive fillers. These details can significantly affect molding behavior and final performance.
Unfilled PEEK is often selected when toughness, purity, insulation, and balanced molding behavior are priorities. PEEK CF30 usually provides higher rigidity and lower thermal expansion in the fiber direction, but it may also produce more directional shrinkage and a less uniform surface appearance. Carbon fiber can also increase electrical conductivity relative to virgin PEEK, although the actual resistance depends on the formulation, fiber network, moisture, and processing conditions.
I therefore treat PEEK CF30 as an engineering compound rather than a universal replacement for virgin PEEK. The right choice depends on load direction, operating temperature, wear conditions, chemical exposure, tolerance requirements, and the customer’s validation standard. A material comparison should use measured values from the specific grade rather than generic PEEK or generic carbon-fiber data.
The principal function of carbon fiber is to increase modulus and reduce deformation under load. This can help components maintain geometry under sustained force, especially when the design takes advantage of fiber orientation. The improvement is not identical in every direction because injection molding aligns short fibers along the melt-flow path.
For this reason, I recommend reviewing tensile modulus, tensile strength, flexural modulus, compressive performance, impact strength, and creep data together. A high stiffness value alone does not confirm suitability for impact-loaded or fatigue-sensitive parts. The test method, specimen orientation, conditioning, and temperature should also be recorded because these variables influence the result.
Carbon fiber can reduce the coefficient of thermal expansion compared with unfilled PEEK, which may support tighter dimensional control across temperature changes. This advantage is most useful in precision fixtures, bearing cages, pump components, and structural parts where thermal movement must be limited. However, molded shrinkage can become anisotropic, so mold-flow analysis and orientation-aware tolerancing remain important.
PEEK’s glass-transition temperature is approximately 143°C, while its melting point is commonly around 343°C. These figures describe polymer transitions, not a guaranteed continuous-use temperature for every CF30 component. The actual service limit depends on stress, exposure time, oxidation, wear, geometry, and the specific compound formulation.
PEEK is known for resistance to many chemicals, hydrolysis, and elevated-temperature environments, while carbon fiber can contribute to stiffness and dimensional control in tribological components. Nevertheless, PEEK CF30 is not automatically the best wear grade. If friction and wear are dominant design requirements, I recommend comparing it with a tribologically modified PEEK compound containing suitable lubricants or solid additives.
Compatibility must be evaluated against the actual media, concentration, temperature, pressure, and exposure duration. A chemical compatibility chart is useful for initial screening, but it should not replace testing when the application involves aggressive chemicals, repeated thermal cycling, or safety-critical service. Victrex provides technical information on PEEK polymer performance and processing that can support early material evaluation.
Reference: Victrex PEEK product information.
PEEK CF30 may be considered for lightweight brackets, sensor housings, thrust components, retainers, and structural parts exposed to heat or vibration. Its high stiffness-to-weight potential can support metal-replacement studies when the design, joining method, and dimensional requirements are suitable. I recommend validating resistance to fluids such as oils, fuels, coolants, and cleaning agents under the intended temperature profile.
Industrial users may evaluate PEEK CF30 for gears, rollers, guide elements, pump parts, valve components, fixtures, and wear-resistant structural components. The material can be attractive when a part must combine low mass with stiffness and chemical resistance. For sliding applications, the counterface material, surface finish, contact pressure, speed, lubrication, and heat dissipation should be reviewed as a complete system.
PEEK CF30 can be used in selected equipment components where dimensional stability and elevated-temperature performance are important. However, carbon-fiber reinforcement may alter electrical insulation behavior, surface resistivity, and electromagnetic response compared with virgin PEEK. If the part is an insulator, I recommend confirming volume resistivity and dielectric requirements for the exact grade rather than assuming that all PEEK compounds have the same electrical properties.
High-performance PEEK compounds are sometimes evaluated for aerospace, energy, and fluid-handling parts because of their combination of temperature resistance, strength retention, and chemical resistance. These sectors often require extensive documentation, traceability, qualification testing, and process control. Material suitability should therefore be determined through the applicable customer specification and regulatory approval process, not by resin name alone.
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PEEK CF30 is one option within a broader family of PEEK compounds. Buyers may also compare unfilled PEEK, glass-fiber-reinforced PEEK, carbon-fiber compounds with lower or higher fiber content, wear-modified PEEK, electrically conductive grades, and grades designed for specific molding or extrusion processes.
| Material option | Typical selection priority | Important caution |
|---|---|---|
| Unfilled PEEK | Toughness, purity, insulation, balanced performance | May provide less stiffness and dimensional control than reinforced grades |
| PEEK CF30 | High stiffness, reduced thermal movement, structural support | Fiber orientation and anisotropic shrinkage require design attention |
| Glass-fiber PEEK | Stiffness and dimensional stability with different cost or property targets | Specific strength, wear, and flow behavior vary by formulation |
| Wear-modified PEEK | Lower friction or improved sliding performance | May not provide the same structural reinforcement as CF30 |
In practice, I compare grades using the same test standards and conditioning state. For example, two materials both labeled CF30 may differ in polymer molecular weight, fiber sizing, pellet quality, colorant, additive package, and recommended molding temperature. Those differences can affect weld-line strength, surface finish, flow length, mold wear, and part-to-part consistency.
A complete purchasing review should include more than a product name and nominal fiber percentage. I recommend requesting the following information before approving a PEEK CF30 granule for production:
The temperature ranges above are representative screening values, not universal processing instructions. PEEK processing guidance varies by grade, equipment, mold design, residence time, and part thickness. I recommend using the supplier’s technical data sheet and processing guide as the controlling reference, then confirming the window through a documented molding trial.
Reference: Ensinger PEEK material information.
PEEK has relatively low moisture absorption compared with many hygroscopic engineering plastics, but proper storage and drying remain important for stable molding. I keep granules sealed, protected from contamination, and conditioned according to the supplier’s instructions. The drying time and temperature should be selected from the grade-specific data sheet rather than copied from another PEEK compound.
Processing equipment must be capable of reaching the high melt and mold temperatures required by PEEK. A representative melt-temperature range may be 360–400°C, while some applications use mold temperatures around 160–200°C; the exact settings depend on the compound and part geometry. The mold, barrel, nozzle, and hot-runner system should be designed for high-temperature operation and suitable wear resistance.
Injection speed, pressure, gate position, wall thickness, and cooling conditions influence carbon-fiber orientation and final shrinkage. I use balanced gating and mold-flow review where dimensional tolerances or mechanical directionality are important. Weld lines, sharp corners, abrupt thickness changes, and poorly vented areas should be evaluated because they can reduce part quality.
Production approval should include dimensional inspection, visual inspection, mechanical testing, and application-specific functional tests. For critical components, I recommend checking representative parts after conditioning at the intended temperature and environmental exposure. A stable process window should be documented with key parameters such as melt temperature, mold temperature, injection pressure, holding pressure, cooling time, and cycle time.
When I help buyers screen PEEK CF30 suppliers, I first distinguish between a material requirement and a part requirement. A specification such as “30% carbon-filled PEEK” is incomplete unless it also identifies the required mechanical values, thermal range, electrical behavior, color, processing method, and quality documentation. The buyer should also define whether the material is for prototyping, pilot production, or continuous manufacturing.
Price per kilogram is important, but it should be assessed together with yield, drying requirements, cycle time, tooling wear, scrap, and supply reliability. A lower quoted price may not reduce total cost if the material produces unstable dimensions or requires additional process development. I recommend comparing at least one sample lot and one production-intent lot when the application has tight tolerances.
| Evaluation area | Questions to ask the supplier |
|---|---|
| Material identity | Is the grade virgin PEEK-based, and what does CF30 mean in the product specification? |
| Quality consistency | How are fiber content, moisture, color, and key mechanical properties controlled by lot? |
| Processing | Can the supplier provide drying, melt-temperature, mold-temperature, and residence-time guidance? |
| Documentation | Are technical data sheets, safety data sheets, inspection reports, and traceability available? |
| Commercial support | What are the MOQ, sample policy, packaging options, lead time, and technical response process? |
At YONGJUXING, I approach PEEK CF30 sourcing as a technical and commercial evaluation rather than a simple commodity purchase. We can discuss the target application, processing method, required quantity, color, packaging, documentation, and expected operating environment before recommending a suitable supply route. Where the exact grade or property target is not yet fixed, I recommend starting with a technical comparison and representative sample review.
Our support can include product information, quotation preparation, sample coordination, packaging discussion, export communication, and supplier-side clarification of processing conditions. Because carbon-fiber-filled PEEK grades can differ between manufacturers, I encourage buyers to compare the actual technical data sheet and lot documentation before final approval. Any application involving safety, medical use, aerospace qualification, or regulatory control should be reviewed against the customer’s formal compliance requirements.
For an accurate quotation, I suggest providing the expected annual volume, trial quantity, delivery destination, molding process, target specifications, and whether a particular brand or equivalent grade is required. This information helps us evaluate MOQ, packaging, lead time, and technical suitability without making unsupported assumptions. We can then support a more efficient sample-to-production decision process.
PEEK CF30 is a strong candidate when a component requires high-temperature thermoplastic performance together with increased stiffness and improved dimensional stability. It is especially worth evaluating for precision industrial, automotive, electrical, fluid-handling, and wear-related components where the design can accommodate fiber orientation. It may be less suitable when maximum toughness, uniform electrical insulation, very smooth appearance, or isotropic behavior is the primary requirement.
My recommended next step is to define the part’s load, temperature, chemical exposure, tolerance, processing method, and required documentation. Then compare a specific PEEK CF30 grade with unfilled PEEK, glass-fiber PEEK, or wear-modified alternatives using supplier data and application testing. Contact YONGJUXING with your target grade, quantity, destination, and technical requirements so we can help organize a practical material and supply evaluation.
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