The Application Of Conductive Fiber, Come To Understand It
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The conductive fabric made of conductive fiber has excellent functions of conducting, conducting heat, shielding and absorbing electromagnetic wave. It is widely used in conductive network and conductive work clothes in electronic and power industry, electric heating clothes, electric heating surface and electric heating bandages in medical industry, electromagnetic shielding covers in aviation, aerospace and precision electronics industry, etc.
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Conductive fibers can be used in antistatic textiles, electromagnetic radiation resistant textiles, intelligent textiles, military textiles and other fields.
1. Antistatic textiles
Conductive fiber is a functional fiber based on the mechanism of electronic conduction, which can eliminate static electricity through electronic conduction and corona discharge. Because there are free electrons in the fiber, its antistatic property is not humidity dependent; the charge half-life of conductive fiber is short, in any case, it can eliminate static electricity in a very short time, using conductive fiber to prevent the generation and harm of static electricity has a wide range of 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% ~ 5% of the conductive fiber into the general fiber. The antistatic work clothes made of conductive fiber are suitable for oil field, oil processing, coal mine, electronic industry, photosensitive material industry and other flammable and explosive occasions, as well as dust-free sterile clothes or special filtering materials.
2. Anti electromagnetic radiation textiles
Electromagnetic shielding is the reflection and guidance effect of low resistivity conductive materials on electromagnetic current, which produces current and magnetic polarization in the conductor material opposite to the original magnetic field, so as to reduce the radiation effect of the original electromagnetic field. The electrical resistivity of the conductive fiber used to prevent electromagnetic radiation is very low, usually only 10-6 ~ 10-2 Ω / cm. In recent years, due to the wide application of electronic and electrical equipment and communication equipment, the equipment misoperation, image and sound barrier and the harm to human body caused by the interference of electromagnetic radiation have attracted people's attention to the development of electromagnetic shielding materials. The development of conductive fibers with low resistivity and the tight market are also caused by this.
Using the electromagnetic shielding property of conductive fiber, it can be used to make electromagnetic shielding covers for precision electronic components, high-frequency welding machines, etc., and to make walls, ceilings of houses with special requirements, and wall stickers for absorbing radio waves, etc. In Japan, copper coated conductive fibers are blended or made into nonwovens, which have been widely used as electromagnetic wave shielding and absorbing materials, such as ship's electromagnetic wave absorbing cover, etc.
3. Sensor textiles
The sensor textiles made of flexible conductive fiber based on the principle of electronic sensor have the advantages of portability and portability, and are widely used in various fields. Solar industry company of Japan has developed a sensor to detect the maximum strain with carbon fiber, which can be used for safety diagnosis of buildings, roads, factories, airplanes, cableways and other structures.
4. The future war of military textile industry will be the information war under the condition of high technology. In this kind of war, the speed of operation is fast, the frequency of attack and defense conversion is fast, the situation of war is changing rapidly, and the traditional combat equipment of soldiers is seriously backward. In order to improve the comprehensive combat ability of soldiers in modern battlefield, it is necessary to improve the ability of soldiers to acquire, process and transmit information, so that the soldiers' understanding of battlefield situation can reach a higher level. The information-based clothing made of conductive fiber just meets this requirement.
Most of the conductive fibers are sensitive to electricity and heat. The fabrics made of conductive fibers can prevent the detection of thermal imaging equipment, and thus can be made into individual thermal imaging protective clothing. The composite of conductive fiber and low dielectric matrix such as resin and rubber can be made into electromagnetic wave absorbing material, which can absorb radar wave, avoid radar tracking, and achieve the purpose of stealth of weapon equipment. The discolored military uniform developed in the United States is a conductive circuit composed of conductive fibers added to the fabric. By controlling the temperature, the thermal discolored ink in the military uniform changes, so that the color of the military uniform changes according to the external environment color, and becomes an environmental reactive camouflage.
5. Other applications
By selecting functional conductive additives, fiber materials with other functions, such as antibacterial and far infrared, can also be prepared. Mitsubishi Corporation of Japan uses composite spinning technology to mix high concentration white conductive ceramic particles in the core, so that the fiber has conductivity. At the same time, because the ceramic particles have the characteristics of photothermal transformation, the temperature of the fabric can be raised to 28 ℃ when the fiber is blended with the conventional fiber in 10% quantity under the illumination of light source. This kind of fiber not only makes the wearer feel warm, but also after washing, the drying time is 2 / 3 of that of the conventional fiber. The quick drying is an additional feature of this fiber. Because the conductive particles of the fiber are in the core of the fiber, normal processing, washing, dyeing, etc. will not affect the conductive durability of the fiber