Carbon fiber is a microcrystalline graphite material obtained by carbonization and graphitization of organic fibers.
Carbon fiber is a new material with excellent mechanical properties. Its specific gravity is less than 1 / 4 of that of steel. The tensile strength of carbon fiber resin composites is generally more than 3500MPa, which is 7-9 times that of steel. The tensile elastic modulus is 230-430gpa, which is also higher than that of steel. Therefore, the specific strength of CFRP, that is, the ratio of the strength of the material to its density, can reach more than 2000 MPA / (g / cm3), while the specific strength of A3 steel is only about 59 MPA / (g / cm3), and its specific modulus is also higher than that of steel. In this sense, it indicates the broad application prospect of carbon fiber in engineering. Looking at the excellent properties of a variety of emerging composite materials, many people expect that human beings are entering an era of widespread application of composite materials from the era of steel.
Carbon fiber can be processed into fabric, felt, mat, tape, paper and other materials. In addition to being used as thermal insulation materials, carbon fibers in traditional use are generally not used alone. They are mostly added to resin, metal, ceramics, concrete and other materials as reinforcement materials to form composite materials. Carbon fiber reinforced composites can be used as aircraft structural materials, electromagnetic shielding and de electrifying materials, artificial ligaments and other body substitute materials, as well as for manufacturing rocket shells, motor boats, industrial robots, automobile leaf springs and drive shafts.
In recent years, with the academic research from short fiber carbon fiber to long fiber carbon fiber, the technology and products of using carbon fiber to make heating materials have gradually entered the military and civil fields. At present, there are many cases of using long fiber carbon fiber to make state grid cables in China. At the same time, carbon fiber heating products, carbon fiber heating products and carbon fiber far-infrared physiotherapy products are also increasingly entering ordinary people's families.