Polyetheretherketone (PEEK) is already one of the most powerful engineering thermoplastics on the market. However, when your application involves extreme loads, high temperatures, or aggressive environments, unfilled PEEK might not be enough. This is where reinforced PEEK comes into play.
The two most common additives are Carbon Fiber and Glass Fiber. But which one is right for your project? At Cylex Plastics, we specialize in providing high-performance materials tailored to your specific needs. In this guide, we will break down the differences between Carbon Fiber reinforced PEEK and Glass Fiber reinforced PEEK.
1. Carbon Fiber Reinforced PEEK (PEEK-CF30)
Carbon fiber reinforcement (typically 30%) significantly enhances the mechanical properties of PEEK. It is the go-to choice for applications requiring the highest strength-to-weight ratio.
Key Benefits:
- Extreme Rigidity: Carbon fiber makes PEEK exceptionally stiff, offering superior load-bearing capabilities.
- Thermal Conductivity: Unlike glass fiber, carbon fiber helps dissipate heat away from bearing surfaces, extending the life of the component.
- Lightweight: It provides incredible strength without adding the weight associated with metals.
- Wear Resistance: PEEK-CF30 offers the best wear and friction performance among PEEK grades.
2. Glass Fiber Reinforced PEEK (PEEK-GF30)
Glass fiber reinforcement (typically 30%) is designed for applications where electrical insulation and chemical resistance are paramount, but high strength is still required.
Key Benefits:
- Electrical Insulation: Unlike carbon fiber, which is electrically conductive, PEEK-GF30 is an excellent electrical insulator.
- Dimensional Stability: It maintains its shape extremely well under high temperatures and constant stress.
- Cost-Effectiveness: Glass fiber reinforced PEEK is generally more affordable than carbon fiber versions while still offering significant performance boosts over unfilled PEEK.
- Chemical Resistance: It retains PEEK’s legendary resistance to a wide range of chemicals.
Comparison Table: CF30 vs. GF30
| Feature | PEEK-CF30 (Carbon) | PEEK-GF30 (Glass) |
|---|---|---|
| Strength/Stiffness | Highest | High |
| Electrical Property | Conductive / Dissipative | Insulative |
| Thermal Conductivity | Higher | Lower |
| Weight | Lighter | Slightly Heavier |
Other Reinforced Materials to Consider
Depending on your environment, you might also consider other reinforced composites provided by Cylex Plastics:
- For low friction: Explore PTFE filled with Carbon Fiber or Glass Fiber Filled PTFE.
- For structural electronics: Our G10 and G11 Epoxy Glass Fiber composites offer industry-standard performance.
- For cost-sensitive applications: PC GF30 provides a balanced alternative.
Which One Should You Choose?
Choose Carbon Fiber Reinforced PEEK if your application involves high-speed friction, requires maximum stiffness, or needs to dissipate static or heat. It is ideal for aerospace, automotive, and oil & gas components.
Choose Glass Fiber Reinforced PEEK if you need high strength but must ensure electrical insulation, or if you are looking for a more economical solution for structural parts in medical or chemical processing industries.
Expert Support from Cylex Plastics
Selecting the right thermoplastic is critical to the success of your project. As a global supplier, Cylex Plastics provides high-quality FR4, PEEK, and other advanced materials to meet your exacting standards.
Need a custom quote or material recommendation? Contact our engineering team today!
