What is basalt fiber?
Release date：2018-09-04 The author： Click：
Basalt fiber introduction
Basalt fiber is a continuous fiber made from basalt material melted at 1450 ~1500 ~1500 ~high speed drawing by platinum-rhodium alloy wire leak plate. Its strength is similar to that of high strength S glass fiber. Natural basalt fibers are usually brownish and somewhat golden. Basalt fiber is a new kind of inorganic environmental friendly green high performance fiber material. It is made of silica, alumina, calcium oxide, magnesium oxide, iron oxide and titanium dioxide and other oxides. After melting at high temperature, the basalt fiber is quickly drawn by leak plate. Basalt continuous fiber not only has high strength, but also has many excellent properties such as electrical insulation, corrosion resistance, high temperature resistance and so on. In addition, the production process of basalt fiber determines that the waste generated is less, less pollution to the environment, and the product can be directly degraded in the environment after being discarded without any harm, so it is a kind of veritable green, environmental protection material. Basalt fiber has been listed as one of the four major fibers (carbon fiber, aramid fiber, ultra-high molecular weight polyethylene, basalt fiber) in China, and industrial production has been realized. Basalt continuous fiber has been widely used in fiber reinforced composites, friction materials, shipbuilding materials, thermal insulation materials, automotive industry, high temperature filter fabrics and protection fields.
Foreign name basalt fiber
High strength, corrosion resistance and insulation.
Fiber reinforced roving short cut gauze composite material
Application of building insulation to environmental protection and heat insulation
The surface of basalt fiber is smoother and the surface energy is lower. After surface modification, nano-SiO2 particles are added to the surface of basalt fiber, which can effectively improve the surface roughness of the fiber and increase the effective contact area between microorganism and carrier. Electrostatic attraction promotes microbial immobilization and is beneficial to microbial immobilization. The surface active functional groups on the modified surface increase the surface energy of the carrier, and contain hydroxyl, carbonyl or carboxyl groups, which play an active role in the adhesion and growth of microorganisms on the surface of the carrier. The surface modification of basalt fiber carrier can make it have good hydrophilicity and microbial loading performance, make it able to load more biomass, and maintain high microbial activity for a long time, so as to achieve more effective degradation of pollutants in water by biofilm method.
1. Untwisted roving of basalt fiber is a kind of basalt fiber product which is composed of multiple parallel precursors or single parallel precursors without twisting.
2. The basalt fiber textile yarn is a yarn made of several basalt fiber precursors twisted and stranded. The diameter of the single fiber is generally less than 9 nm. Textile yarn can be divided into weaving yarn and other industrial yarns; weaving yarn is mainly tubular yarn, milk bottle-shaped bobbin yarn.
3, basalt fiber chopped yarns are products made from continuous basalt fiber precursors. The fibers were coated with (silane) wetting agents. So basalt fiber staple yarn is the first choice for reinforcing thermoplastic resin, and it is also the best material for reinforcing concrete. Basalt is a high-performance volcanic component. This special silicate makes basalt fiber have excellent chemical resistance, especially alkali resistance. Therefore, basalt fiber is a good material to replace polypropylene (PP) and polyacrylonitrile (PAN) for strengthening cement concrete, and it is also a very competitive product to replace polyester fiber and lignin fiber for asphalt concrete, which can improve the high temperature stability, low temperature crack resistance and fatigue resistance of asphalt concrete.
4, basalt fiber yarn will be made of basalt fiber bulky yarn through high performance bulky yarn machine. The forming principle is that the high-speed air flow enters the forming and expanding channel to form turbulent flow, which can disperse the basalt fibers and form the terry fibers, thus endowing the basalt fibers with bulkiness and forming bulky yarns.
5, basalt fiber cloth
6, basalt fiber felt
7, basalt fiber composites
Compared with high-tech fibers such as carbon fiber, aramid fiber and ultra-high molecular weight polyethylene fiber (UHMWPE), basalt fiber has the characteristics of high strength and high modulus, high temperature resistance, oxidation resistance, radiation resistance, heat insulation and sound insulation, good filtration, compressive strength and shear strength. It is a kind of pure natural inorganic non-metallic material, and it is also a kind of new basic material and high-tech fiber which can meet the needs of the development of the basic industry of the national economy.
Basalt fibers and their composites can well meet the needs of structural materials in the fields of national defense construction, transportation, construction, petrochemical industry, environmental protection, electronics, aviation and aerospace, and play an important role in promoting national defense construction, major projects and upgrading of industrial structure. It is not only a green material that meets the requirements of ecological environment in the 21st century, but also a competitive new material industry which can be sustained developed in the world high-tech fiber industry. Especially our country already has the independent intellectual property rights of the basalt fiber manufacturing technology and technology, and with the "later-up" advantage to reach the international leading level, therefore, vigorously develop the basalt fiber and its composite material industry is undoubtedly of great significance.
Surface modification technology of fiber mainly includes surface oxidation modification technology, electroless plating/electroplating surface modification technology, plasma modification technology and coating modification technology, among which coating modification technology is the most widely used, mainly
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