PEEK CF30 granules are a carbon-fiber-reinforced grade of polyether ether ketone (PEEK), commonly formulated with a nominal 30% carbon fiber by weight. They are selected when a component needs greater stiffness, strength, and dimensional stability than an unfilled PEEK grade can provide, while retaining PEEK’s high-temperature capability. Typical application areas include industrial machinery, aerospace-related components, automotive systems, and electrical equipment, subject to the exact grade and operating conditions. This guide explains the material’s characteristics, trade-offs, and practical checks to make before requesting a quote or committing to production.
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This guide is for engineers, product designers, molders, and purchasing teams evaluating PEEK CF30 granules for injection-molded components. It is also useful for buyers comparing reinforced PEEK with unfilled PEEK or other engineering plastics. Because properties and processing recommendations vary by manufacturer and grade, use the figures here as general orientation rather than as a substitute for a current technical data sheet. Confirm the precise specification with your supplier before design approval or production.
PEEK is a high-performance thermoplastic, and CF30 generally denotes a PEEK compound containing approximately 30% carbon fiber by weight. Carbon fiber reinforces the polymer matrix, usually increasing stiffness and reducing thermal expansion compared with unfilled PEEK. The reinforcement also makes the compound anisotropic: properties can differ depending on fiber orientation and direction of measurement. The exact formulation, fiber characteristics, and resulting performance should be verified against the grade-specific data sheet.
Unfilled PEEK is often considered when toughness, wear behavior, or a more uniform appearance is important. PEEK CF30 is more appropriate when higher rigidity and dimensional control are priorities, but the fibers can make the molded surface less smooth and may increase wear on processing equipment. Reinforcement does not automatically make a component suitable for every demanding environment. Design, molding conditions, temperature, chemical exposure, and mechanical loading all affect service performance.
PEEK is known for its high-temperature capability, chemical resistance, and mechanical performance, but compound properties are grade-specific. As reference points, unfilled PEEK is commonly reported with a glass-transition temperature near 143°C and a melting temperature near 343°C; these are polymer reference values, not guaranteed PEEK CF30 finished-part operating limits. A 30% fiber designation refers to nominal composition and should be checked for the supplier’s stated basis, tolerances, and test method. For design decisions, prioritize the selected grade’s datasheet and testing under conditions representative of the actual component.
| Specification to review | Why it matters | What to confirm |
|---|---|---|
| Carbon-fiber content | Affects stiffness, weight, and directional behavior | Nominal percentage, basis, and test method |
| Mechanical properties | Informs load-bearing and deflection decisions | Test direction, temperature, and specimen method |
| Thermal data | Helps assess processing and service conditions | Test method and distinction between transition and use temperature |
| Molding guidance | Supports stable filling and consistent part quality | Drying, melt, mold, and residence-time recommendations |
| Appearance and finish | Relevant to visible parts and assembly interfaces | Color, surface expectations, and fiber exposure |
Designers may evaluate PEEK CF30 for structural or semi-structural parts that need rigidity at elevated temperatures, including brackets, housings, fixtures, and selected machinery components. Its reinforcement may also help reduce dimensional change in applications where thermal expansion is a concern. In electrical or automotive applications, suitability depends on the complete system requirements, including temperature, electrical behavior, chemical contact, and applicable industry specifications. Do not assume that a material is approved for a regulated application simply because it is based on PEEK.
Begin with the component’s actual load case, temperature range, chemical exposure, and expected service life. Then consider whether the part needs fiber-level stiffness or whether unfilled PEEK, glass-fiber-reinforced PEEK, or another material may better meet its toughness, surface, or cost requirements. A molded coupon’s reported properties may not predict a complex part because gate position and flow can influence fiber orientation. Where failure has significant consequences, validate the design with representative molding and application testing.
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Write down the required mechanical, thermal, dimensional, and environmental conditions before comparing grades. Specify the loads, likely hot spots, contact chemicals, and any electrical or flame-related requirements that apply to the part. Separate mandatory requirements from preferences such as color or surface finish. This prevents a high-performance material designation from becoming a substitute for a clear engineering specification.
PEEK is processed at high temperatures, and molding equipment, tooling, and process controls must be suitable for the selected grade. As broad process context, PEEK melt processing commonly involves temperatures in the approximate 360–400°C range, while recommended mold temperatures can be around 160–200°C; actual settings vary by grade, machine, part geometry, and supplier guidance. These ranges are not a process recipe. Ask the supplier for current drying and molding recommendations, then establish settings through controlled trials.
Account for fiber orientation when setting tolerances and assessing strength in different directions. Review gate location, wall thickness, weld-line risk, and features that could concentrate stress. Carbon fibers can affect surface appearance and may abrade tooling, so discuss the mold material and maintenance plan with the processor. If a polished or cosmetic finish is essential, request samples or a molding assessment before finalizing the design.
Request a grade-specific technical data sheet and, where relevant, a safety data sheet, lot identification details, and available quality documentation. Confirm packaging, storage recommendations, batch consistency controls, and how the supplier handles specification changes. For a production program, discuss forecast volumes and required delivery schedules rather than relying on a single sample order. Any certification or regulatory declaration must be confirmed for the exact grade and intended application.
PEEK CF30 pricing depends on the grade formulation, order quantity, packaging, market conditions, and delivery destination. Minimum order quantity and lead time are supplier- and order-specific, so they should be confirmed in a written quotation rather than assumed from a general product description. For a fair comparison, provide the same target grade, annual or project quantity, delivery location, and documentation requirements to each supplier. Also clarify whether the quotation covers samples, freight, and any technical support requested.
At YONGJUXING, we support B2B buyers evaluating PEEK CF30 granules by discussing grade requirements, intended applications, and supply details. To help us assess a request, share the component use, target properties, estimated quantity, processing method, and destination market. This information allows us to check product fit and clarify which technical documents and commercial details are available for the requested grade. Final material approval should be based on your engineering requirements and the applicable grade documentation.
PEEK CF30 granules are a reinforced PEEK option for applications where increased stiffness and dimensional stability may be more important than the flexibility or surface characteristics of unfilled PEEK. The nominal 30% carbon-fiber designation, PEEK reference transition temperatures, and broad processing ranges are useful starting points, but they do not replace grade-specific data or application validation. The best selection process defines operating conditions first, compares documented grades, and then checks molding and supply requirements. To move forward, prepare your part specification and request a current datasheet, sample or trial plan, MOQ, and delivery quotation from YONGJUXING.
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