Application of conductive fiber

Conductive fabrics made of conductive fibers have excellent electrical conductivity, heat conduction, shielding and absorption of electromagnetic waves, etc., and are widely used in conductive nets and conductive overalls in the electronics and power industries; electric heating clothing, electric heating surfaces, and electric heating bandages in the medical industry; aviation, Electromagnetic shielding cover for aerospace and precision electronics industries, etc. Conductive fibers can be used in fields such as antistatic textiles, anti-electromagnetic radiation textiles, smart textiles and military textiles. 1. Antistatic textiles Conductive fiber is a functional fiber with electronic conduction as the mechanism, which eliminates static electricity through electronic conduction and corona discharge. Because the fiber contains free electrons, its antistatic properties are not dependent on humidity; the charge half-life of conductive fibers is short, in any case, it can eliminate static electricity in a very short time, and use conductive fibers to prevent the generation and harm of static electricity. Broad environmental adaptability. According to the conductivity of the conductive fiber and the structure of the fabric, the antistatic effect can be achieved by mixing 0.05% to 5% of the conductive fiber in the general fiber. Work clothes made of conductive fibers with antistatic effect, suitable for oil fields, petroleum processing, coal mines, electronics industry, photosensitive material industry and other flammable and explosive occasions, and also suitable for dust-free sterile clothing or special filter materials Wait. 2. Anti-electromagnetic radiation textiles Electromagnetic shielding is the use of low-resistivity conductive materials to reflect and guide electromagnetic currents, and generate current and magnetic polarization opposite to the original magnetic field inside the conductive material, thereby reducing the radiation effect of the original electromagnetic field. Conductive fibers used as protection against electromagnetic radiation require very low resistivity, usually only 10~10Ω/cm. In recent years, due to the wide application of electronic and electrical equipment and communication equipment, the interference of electromagnetic radiation caused equipment misoperation, image and sound obstacles, and harm to the human body, etc., which aroused people's attention to the development of electromagnetic shielding materials. The development of low-resistivity conductive fibers and the tight market are also triggered by this. Using the electromagnetic shielding properties of conductive fibers, it can be used to make electromagnetic shields for precision electronic components, high-frequency welding machines, etc., to make walls and ceilings of houses with special requirements, and wall coverings that absorb radio waves. In Japan, conductive fibers coated with copper on the surface are blended or made into non-woven fabrics, which are now widely used as electromagnetic wave shielding and absorbing materials, such as electromagnetic wave absorbing covers for ships. 3. Sensor textile The flexible conductive fiber is made of sensor textiles based on the principle of electronic sensors. It has the advantages of lightness and portability, and is widely used in various fields. Japan Taiyo Industry Co., Ltd. uses carbon fiber to develop a sensor that detects the maximum strain, which can be used for safety diagnosis of structures such as buildings, roads, factories, airplanes, and ropeways. 4. The future war for military textiles will be an informationized war under high-tech conditions. In such wars, the pace of operations is fast, the frequency of offensive and defensive transitions is fast, and the war situation is changing rapidly, and traditional soldiers' combat equipment appears to be seriously backward. To improve the comprehensive combat capabilities of soldiers in the modern battlefield, it is necessary to improve the soldiers' ability to acquire, process, and transmit information, so that the soldiers' understanding of the battlefield situation can reach a higher level. Information clothing made of conductive fibers just meets this. One requirement. Most conductive fibers are sensitive to electricity and heat. The fabric woven from conductive fibers can prevent reconnaissance by thermal imaging equipment, and can be made into thermal imaging protective clothing for individual soldiers. Conductive fiber is compounded with low-dielectric matrix such as resin and rubber to make electromagnetic wave absorbing material. This material can absorb radar waves, avoid radar tracking, and realize the purpose of stealth weapon equipment. The color-changing military uniform developed by the United States is to add a conductive circuit composed of conductive fibers to the fabric. By controlling the temperature, the thermochromic ink in the military uniform is changed, so that the color of the military uniform changes according to the color of the external environment. An environmentally reactive camouflage. 5. Other applications By selecting functional conductive additives, fiber materials with other functions besides the conductive function can also be prepared, such as antibacterial, far infrared, etc. Japan's Mitsubishi Corporation uses composite spinning technology to mix high-concentration white conductive ceramic particles in the core to make the fiber conductive. At the same time, because the added ceramic particles have the characteristics of light-to-heat conversion, after blending this fiber with conventional fibers in an amount of 10%, the temperature of the fabric can be raised to 28°C under the light source. This fiber not only makes the wearer feel warm, but after washing with water, its drying time in the sun is 2/3 of that of the conventional fiber. The quick-drying property is an additional characteristic of this fiber. Since the conductive particles of this fiber are in the core of the fiber, normal processing, washing, dyeing, etc. will not affect the conductivity of the fiber.