Dafu

In the realm of high-performance polymers, Polyether Ether Ketone (PEEK) stands at the pinnacle of the plastics industry pyramid. As a semi-crystalline specialty polymer characterized by a repeating unit containing one ketone and two ether bonds, PEEK boasts a melting point of 343°C and a glass transition temperature (Tg) of 143°C. Its load-bearing heat distortion temperature reaches up to 315°C, with intermittent service temperatures around 300°C. Combining tensile strength of 132–148 MPa with a density of just 1.32 g/cm³, PEEK offers a unique blend of metal-like rigidity and plastic-like processability.

Leveraging this "super engineering plastic," Dafu New Materials​ utilizes advanced thermoplastic processing to manufacture high-quality PEEK films, available in both low-crystallinity and high-crystallinity variants to meet diverse application demands.

I. Core Characteristics: The Benchmark for High-End Films

Dafu New Materials’ PEEK films distinguish themselves through unparalleled physical and chemical properties:

• Exceptional Thermal Stability:​ The films withstand the rigors of lead-free soldering processes. They maintain an RTI (Relative Thermal Index) rating of 220°C for mechanical applications​ and 200°C for electrical applications. Remarkably, the material remains stable up to its carbonization point of 500°C.
• Superior Mechanical & Fatigue Resistance:​ Achieving an optimal balance between toughness and rigidity, these films exhibit outstanding fatigue resistance against alternating stress—performance comparable to certain alloys and superior to all other resin films.
• Outstanding Chemical Inertness:​ Exhibiting corrosion resistance similar to nickel steel, PEEK films are virtually impervious to chemical attack. Concentrated sulfuric acid is one of the few chemicals capable of degrading the material.
• Inherent Flame Retardancy & Safety:​ Without any additives, Dafu PEEK films achieve a UL94 V-0​ rating. They are halogen-free, comply with IEC 61249-2-21 standards, and meet FDA requirements for food contact, ensuring safety and environmental compliance (RoHS).
• Excellent Electrical & Acoustic Properties:​ With a volume resistivity of 10¹⁶ Ω·cm and a dielectric constant of 3.2–3.3, the films provide superb insulation. Unlike metal foils, they offer high sound clarity, eliminating the "noise fatigue" associated with metallic components.

II. Processing Versatility & Applications

Beyond performance, Dafu New Materials focuses on processability. When heated above their melting point, these films fuse easily with metals. They support ultrasonic sealing​ (compatible with PET films) and laser welding/marking, facilitating complex manufacturing workflows.

Furthermore, Dafu offers an impressive thickness range from 3 microns to 150 microns, enabling precision engineering across sectors:

1. Aerospace:​ Ideal for lightweight, radiation-resistant wire harness wrapping and structural components requiring high thermal stability.
2. Medical Devices:​ Utilized in artificial bone repair scaffolds, surgical instrument insulation, and sterilizable packaging due to biocompatibility and hydrolysis resistance.
3. Electronics & Electrical:​ Serves as a premium substrate for flexible printed circuits (FPCs), high-frequency 5G components, and magnet wire insulation where high dielectric strength is crucial.
4. Industrial Manufacturing:​ Modified grades (e.g., with carbon fiber or graphite) provide superior self-lubrication and wear resistance for bushings, bearings, and seals in harsh environments.

Conclusion

PEEK film represents the cutting edge of polymer film technology. Through deep expertise in material science and precision manufacturing, Dafu New Materials delivers consistent, high-quality PEEK film solutions. Whether facing extreme temperatures, corrosive chemicals, or demanding mechanical stresses, Dafu New Materials provides the critical material foundation for innovation at the highest level.