LFT virgin composite PEEK Long Carbon Fiber Reinforcement high strength and rigidity

PEEK-Long carbon fiber

Polyetheretherketone (PEEK), the complete English name for polyetheretherketone, is a specialty engineering plastic with excellent performance, and has more advantages than other specialty engineering plastics, such as wear resistance, high temperature resistance, high strength and high modulus, flame retardant and radiation resistant, and so on. In addition polyetheretherketone (PEEK) has good thermal stability and melt flow above the melting point, so polyetheretherketone (PEEK) also has the typical processing properties of thermoplastics.

PEEK resin is nontoxic, lightweight, corrosion-resistant, and one of the closest materials to the human skeleton, which is well compatible with the musculature, so it is often used instead of metal to make human bones. Carbon fiber-reinforced PEEK composites make up for the weaknesses of toughness and deviations in impact strength. Carbon fiber-reinforced PEEK composites can exhibit high mechanical strength and hydrolytic stability under conditions such as hot water, steam, solvents, and chemical reagents, and can be used to prepare various medical devices that require high-temperature steam sterilization.

Advantages of PEEK-LCF

PEEK has high rigidity, good dimensional stability, low coefficient of linear expansion, and can withstand great stress without significant elongation over time, and its low density and good processing properties make it suitable for parts with high requirements for fineness. Among these elements, carbon fiber materials overlap highly with the characteristics of PEEK. Carbon fiber is not only one of the typical lightweight materials, it is also outstanding in terms of mechanical properties. As a result, carbon fiber reinforced PEEK composites can reduce weight by at least 70% compared to traditional metal materials.

PEEK material itself is very wear-resistant, and good interface bonding with carbon fibers to further enhance its wear resistance, through the carbon fiber reinforced PEEK composite parts and cobalt alloy materials for wear comparison experiments, the results show that: at 23 ℃, using the M-200 wear machine at 400 rpm after 100 minutes of wear, found that the carbon fiber reinforced PEEK composite surface smooth The wear marks were small, and the carbon fiber bonded well with PEEK without fiber extraction. In contrast, the cobalt alloy surface wear marks are very obvious, even a large number of wear particles appear, the metal internal impurities image visible.

PEEK exhibits high mechanical strength and hydrolytic stability in hot water, steam, solvents and chemical reagents, etc.

Datasheet for reference

PEEK-LCF application

Q&A

1. What are the types of thermoplastic carbon fiber composites?

Carbon fiber thermoplastic composites are composites with carbon fiber as the reinforcing material and thermoplastic resin as the matrix. From the reinforcement method of carbon fiber, it can be divided into long-cut carbon fiber (LCF) reinforced thermoplastic composites, short-cut carbon fiber (SCF) reinforced thermoplastic composites and continuous carbon fiber (CCF) reinforced thermoplastic composites.

Long-cut carbon fiber and short-cut carbon fiber mainly refer to the application length of carbon fiber materials, there is no strict fixed distinction between the two, generally between a few millimeters to a few centimeters, the more common specifications are 6mm, 12mm, 20mm, 30mm, 50mm.

Carbon fiber thermoplastic composites can also be classified according to the thermoplastic resin. There are many common thermoplastic resins, such as PE, PP, PVC, etc. However, thermoplastic resin composites with carbon fiber reinforcement are mostly used in aerospace, precision equipment and other demanding working environments, therefore, carbon fiber thermoplastic composites are more often made of polyether ether ketone (PEEK), PPS, polyimide ( PI), polyetherimide (PAI) and other mid- to high-end thermoplastic resins as the matrix to achieve the optimization of material performance.

2. How does thermoplastic carbon fiber composite material achieve low cost and environmental protection?

Thermoplastic carbon fiber composites are used to make parts for high-end machinery. They have excellent machinability, vacuum forming, stamping mold plasticity, and bending processability.

For example, Teijin has been able to add a recycling process to the process according to specific needs, and to shred and mold the corners of thermoplastic carbon fiber composite materials after stamping to make recycled materials for making small products or for molding nuts and studs on carbon fiber prototypes. This method can greatly reduce the loss of raw materials, improve the efficiency of the use of thermoplastic carbon fiber composite materials, reduce the overall cost, and thus achieve the purpose of environmental protection.

In addition, thermoplastic carbon fiber composites can reduce the molding cycle time compared with thermoset carbon fiber composites due to its special process characteristics, which can further reduce the production cost in terms of production efficiency.

3. Thermoplastic carbon fiber composites are only suitable for injection molding?

From the process point of view, injection molding has a higher degree of automation compared with molding, and the raw material is not in contact with the outside world, so the product appearance quality is guaranteed, and there are no black spots, impurities, uneven colors, etc. The mechanical properties, dimensional stability and precision of the product are relatively higher.

Compared to injection molding equipment, compression molding equipment and its mold structure are relatively simple and less expensive to manufacture. The molding equipment can be used for both thermosetting and thermoplastic resins, and in the molding of thermoplastic carbon fiber products, it is the full experience of manufacturing thermosetting carbon fiber parts. The use of molding to make thermoplastic carbon fiber composite parts, the loss of raw materials is smaller and will not cause excessive losses, and when applied to mass production, the price is better to meet market demand compared to the injection molding process.

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About us

Xiamen LFT composite plastic Co., Ltd. is a brand-name company that focuses on LFT&LFRT. Long Glass Fiber Series (LGF) & Long Carbon Fiber Series (LCF). The company's thermoplastic LFT can be used for LFT-G injection molding and extrusion, and can also be used for LFT-D molding. It can be produced according to customer requirements: 5~25mm length. The company's long-fiber continuous infiltration reinforced thermoplastics have passed ISO9001&16949 system certification, and the products have obtained lots of national trademarks and patents.