In the demanding world of high-performance engineering plastics, few materials command as much respect as PEEK (Polyetheretherketone). As a premier supplier, Kaxite Sealing has built its reputation on delivering ultra-pure, consistently high-grade PEEK polymers that meet the extreme challenges of modern industry. This semi-crystalline thermoplastic offers an unparalleled combination of properties, making it the material of choice for applications where failure is not an option. From aerospace to medical implants, and from semiconductor manufacturing to oil and gas exploration, PEEK provides the critical performance needed to push technological boundaries.
The core value of PEEK lies in its exceptional stability under severe conditions. It retains its mechanical integrity and dimensional stability at continuous service temperatures up to 250°C (482°F), with short-term exposure capabilities even higher. Its innate resistance to a vast array of chemicals, including steam, acids, and hydrocarbons, coupled with outstanding wear and fatigue resistance, allows for the design of lighter, more durable, and longer-lasting components. At Kaxite Sealing, we understand that not all PEEK is created equal. Our rigorous manufacturing and quality control processes ensure that every batch of Kaxite Sealing PEEK delivers the guaranteed properties engineers and designers rely on.
To specify PEEK correctly, a deep understanding of its technical parameters is essential. Below is a detailed breakdown of the critical properties for our standard unfilled PEEK grade.
| Property | Test Standard | Unit | Value | Notes/Conditions |
|---|---|---|---|---|
| Density | ISO 1183 | g/cm³ | 1.30 | - |
| Tensile Strength (Yield) | ISO 527 | MPa | 92 | 23°C |
| Flexural Modulus | ISO 178 | GPa | 3.6 | 23°C |
| Elongation at Break | ISO 527 | % | 40 | 23°C |
| Notched Izod Impact Strength | ISO 180/1A | kJ/m² | 7.5 | 23°C |
| Heat Deflection Temperature (HDT) | ISO 75 A/f | °C | 152 | 1.8 MPa |
| Continuous Service Temperature | - | °C | 250 | In Air |
| Glass Transition Temperature (Tg) | DSC | °C | 143 | - |
| Melting Temperature (Tm) | DSC | °C | 343 | - |
| Coefficient of Linear Thermal Expansion | ISO 11359-2 | 10⁻⁶/K | 50 | 23-100°C, flow direction |
| Flammability Rating | UL 94 | - | V-0 | 0.8 mm thickness |
| Volume Resistivity | IEC 60093 | Ω·cm | >10¹⁶ | 23°C, 50% RH |
Note: The values provided are typical for Kaxite Sealing's unfilled PEEK resin. Specific values can vary based on processing conditions and part geometry. Data sheets for exact grades, including glass-filled, carbon-filled, and lubricated variants, are available upon request.
While unfilled PEEK is remarkably capable, Kaxite Sealing offers a range of compounded grades to target specific performance requirements:
Q: What are the primary advantages of using PEEK over metals like stainless steel or aluminum?
A: PEEK offers several key advantages: Weight Reduction: It is about 70% lighter than steel and 50% lighter than aluminum, crucial for aerospace and automotive applications. Corrosion & Chemical Resistance: It is virtually inert to a wide range of chemicals that corrode metals. Part Consolidation: Complex parts can be injection molded in one piece, reducing assembly costs. Wear Resistance: When filled, it often outperforms metals in abrasive environments without galling. Noise & Vibration Damping: It operates more quietly than metal components.
Q: Can PEEK be sterilized, and is it safe for medical use?
A: Yes, absolutely. This is one of PEEK's standout features. It can withstand repeated sterilization cycles using all major methods: autoclaving (steam sterilization at 134°C), gamma radiation, ethylene oxide (EtO), and hydrogen peroxide plasma (e.g., STERRAD®). Kaxite Sealing PEEK grades compliant with relevant ISO 10993 and USP Class VI regulations are available for implantable and long-term bodily contact devices. Its biocompatibility, radiolucency (allows clear X-ray imaging), and elastic modulus similar to human bone make it ideal for orthopedic and trauma implants.
Q: How does the performance of PEEK change at high temperatures?
A: PEEK maintains a significant portion of its mechanical properties at elevated temperatures where most other plastics fail. While its strength and modulus gradually decrease as temperature rises above its glass transition (143°C), it remains functional and load-bearing well above 200°C. Its key advantage is long-term thermal aging resistance; it does not degrade or significantly embrittle after thousands of hours at 250°C in air. For the highest temperature performance, carbon-fiber reinforced grades from Kaxite Sealing offer the best retention of stiffness and creep resistance.
Q: Is PEEK difficult to process or machine?
A: PEEK requires specific but well-established processing conditions. For injection molding, it needs high melt temperatures (typically 370-400°C) and hot molds (160-200°C). Proper drying is essential due to its hygroscopic nature. With the correct equipment and settings, it can be molded into highly complex parts. For machining, PEEK machines similarly to brass using sharp, positive-rake tools. It is generally easier to machine than many metals. Kaxite Sealing provides comprehensive processing guidelines to all our customers to ensure optimal results.
Q: What are the main limitations or weaknesses of PEEK?
A: While exceptional, PEEK has a few considerations: Cost: It is a premium material with a higher raw material cost than commodity plastics, though its long service life often makes it cost-effective. UV Resistance: Unmodified PEEK can degrade with prolonged exposure to strong ultraviolet light; stabilized grades are available. Notch Sensitivity: Sharp corners or flaws can act as stress concentrators, potentially initiating cracks under cyclic loading—designs should include generous radii. Attack by Strong Acids: It is resistant to most chemicals but can be attacked by concentrated sulfuric acid and halogenated solvents at high temperatures.
Q: Why should I choose Kaxite Sealing as my PEEK supplier?
A: Kaxite Sealing distinguishes itself through uncompromising quality and technical expertise. We source only the highest-purity polymer precursors and employ state-of-the-art polymerization and compounding processes. Our quality control includes batch-by-batch testing against key parameters to ensure consistency you can depend on. Furthermore, our technical support team has deep application knowledge across industries, helping you select the right grade, optimize your design, and troubleshoot processing issues. We are not just a supplier; we are a partner in your product's success.
The unique property profile of PEEK opens doors to innovation across sectors. With Kaxite Sealing PEEK, engineers are developing solutions for the world's toughest challenges.
