What Are the Key Technologies for PEEK Composite Material?

Introduction to PEEK

Polyetheretherketone (PEEK) is a special high polymer material composed of repeated units that contain a ketone bond and two ether bonds in the main chain structure. It has excellent physical and chemical properties such as high temperature resistance, chemical resistance, and corrosion resistance. It is a semi-crystalline polymer material that can be used as a high heat resistant structural material and electrical insulation material. It can be used in combination with glass fibers or carbon fibers to prepare reinforced materials.

Key Technologies of PEEK Composite Material

  • Modification technology of PEEK composite material. In order to meet the demand for high-quality, heat-resistant, corrosion-resistant, wear-resistant, fatigue-resistant and impact-resistant new parts in mechanical engineering, PEEK materials are usually modified by blending and filling fiber layer composite reinforcement, in order to obtain new materials with better mechanical properties. Glass fiber-reinforced PEEK materials have good creep resistance, wet heat aging resistance, and impact resistance. When PEEK is reinforced with carbon fiber or fiberglass, the material's extension hardness and torsional stiffness can be improved. To obtain PEEK with good tribological properties, the process route of powder-filled strength reinforcement modification or high-strength fiber and three-dimensional weaving material composite reinforcement is usually adopted, but in recent years, the technology of inorganic nano material filled reinforcement modification has been developed. PEEK composite material is a new type of material that combines the high-performance properties of organic resins and the special properties of inorganic nanoparticles.

  • Forming technology of PEEK composite material. PEEK forming technology can be applied to the molding methods of ordinary plastics, such as extrusion molding, injection molding, compression molding, etc., and can also be formed into plates, rods, pipes, sheets, films and even fiber and other structural materials. Before the forming process, the resin raw material is usually dried between 150°C and 160°C. Since the forming temperature of PEEK is usually high, close to 400 degrees Celsius, special requirements are put forward for the high temperature processing capacity and precision of the forming device. The most common forming method is high-temperature injection molding or high-temperature extrusion molding. High-temperature injection molding is mainly used to produce small parts and blanks. According to the size of the injection molding blanks, they are further processed by ordinary machines such as finishing or honing to produce the required specifications and accuracy of the formed parts. High-temperature extrusion molding is mainly used to prepare plate, rod, tube, wire and other profile blanks. The granulated material produced by a twin-screw high-temperature extruder is extruded into various sizes of plates, bars, tubes, etc. by a special high-temperature extruder combined with different specifications of molds.

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