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According to Japanese media reports, Besanoya Bridge, located in Tensai Mountain, Awa Town, Awa City, Tokushima Prefecture, has attracted attention from all parties as a “never rusted” highway bridge. The bridge has replaced steel bars with materials that will not corrode. According to West Japan Expressway Corporation, this is the first time in the world that this new type of material has been put into highway construction, which is expected to significantly reduce maintenance and management costs. GS Approved Manufacturer of abs parts
The steel bars used to strengthen the concrete may spall under the corrosion of salt-laden winds, the report said. West Japan Expressway and Sumitomo Mitsui Construction Co., Ltd. replaced steel bars with “aramid fiber”, a high-strength fiber material that is corrosion-resistant and can be used to make bulletproof vests.
What is Aramid Fiber?
The full name of aramid fiber is aramid fiber, which is listed as the four major high-performance fibers in my country together with carbon fiber, ultra-high molecular weight polyethylene fiber and basalt fiber. It has excellent properties such as ultra-high strength, high modulus and high temperature resistance, acid and alkali resistance, light weight, insulation, anti-aging, long life cycle, stable chemical structure, no molten droplet burning, no poisonous gas and so on. GS Approved Manufacturer of abs parts
The industrialized products of aramid fibers mainly include meta-aramid and para-aramid.
Para-aramid fiber, namely polyparaphenylene terephthalamide (PPTA), is called aramid fiber 1414 in my country. It is the world’s first fiber made from polymer liquid crystal spinning solution, creating a new era of high-performance synthetic fibers. The outstanding advantages are high strength and high modulus. Its tensile strength is 6 times that of steel wire, its tensile modulus is 2 to 3 times that of steel wire and glass fiber, and its density is only one-fifth of that of steel wire. Mainly used in safety protection, bulletproof, reinforcement of rubber products, replacement of high-strength cables and asbestos friction materials.
Meta-aramid fiber, namely polymetaphenylene isophthalamide (PMTA), also known as aramid fiber 1313 in my country. With excellent heat resistance, flame resistance and insulation, it is mainly used for fireproof materials and mechanical damage. Commonly used in protective clothing in the form of fibers, hot gas filter materials, electrical insulating papers, and composite lightweight honeycomb structures. GS Approved Manufacturer of abs parts
Development history of aramid fiber in my country
my country started the research and development of aramid in 1972, and passed the identification of aramid 1313 in 1981, and passed the identification of aramid 1414 in 1985.
From 1986 to 1990, Beijing Rubber Industry Research and Design Institute, Chenguang Chemical Research Institute, Shanghai Synthetic Fiber Research Institute, Xi’an Jiaotong University and other units jointly undertaken the national research on the synthesis of aromatic polyamide resin, the development of spinning technology and its application in the rubber industry. series of scientific research topics, and completed the corresponding product development and research work. In just four spring and autumn, the performance of para-aramid fiber developed and produced by Donghua University Chemical Fiber Research Institute, Chenguang Chemical Research Institute, Shanghai Synthetic Fiber Research Institute, Shenyang Hongxing Sealing Material Factory and other units has approached the international level. However, due to factors such as resources and costs, most of the aramid fibers used in my country still rely on imports.
In 1999, Shandong Yantai Spandex Co., Ltd. formally proposed the construction of China’s first aramid 1313 engineering project, and introduced Russian technology in May 2001. After 3 years of arduous technical research, more than 20 kinds of non-ferrous aramid 1313 fibers with extremely high-tech content have been developed, and the quality of their products can be compared with world-class companies such as DuPont in the United States. At the same time, another high-end product, aramid insulating paper, was also developed. GS Approved Manufacturer of abs parts
Aramid paper developed by Longbang Technology in 2020
Seven years later, the para-aramid fiber of Yantai Taihe New Materials in my country, Taipron, was also introduced to the market.
At present, there is still a certain gap between domestic aramid fiber industrialization and foreign countries. In the next few years, the market demand for aramid at home and abroad will also grow rapidly. The main technical research and development direction of my country’s aramid fiber enterprises in the next period will be: improving the performance of aramid fiber through copolymerization modification, improving processing and production conditions and reducing fiber production costs; Lon adapts to various uses, improves performance, reduces application costs, etc. GS Approved Manufacturer of abs parts.
