M55J-class high-strength high-carbon fiber made a major breakthrough in the field of preparation technology
On January 28, Ningbo Special Materials Specialty Fiber Division made a major breakthrough in the field of high-strength and high-modulus carbon fiber localization preparation technology. The prepared high-performance carbon fiber has a tensile strength of 4.86 GPa and a tensile modulus of 541 GPa. The modulus At 540GPa, the tensile strength is far better than that of foreign products (4.02GPa), breaking the monopoly of foreign countries in this field and filling the gap of domestic technology.
High-strength high-modulus carbon fiber, also known as graphite fiber, compared with the traditional high-strength carbon fiber, the carbon content of up to 99% or more, and have a higher modulus. In addition, it also has the advantages of low coefficient of thermal expansion, high conductivity, good thermal stability and dimensional stability, and is applied as a key material in fields such as spacecraft and aerospace. For a long time, the core preparation technology of high strength and high modulus carbon fiber has been monopolized by a few foreign companies. For example, Toray has the M40J, M50J, M55J, M60J, etc. besides its high strength medium modulus carbon fiber products such as T800 and T1000 High-strength high-grade carbon fiber products. In view of the importance of high-strength and high-modulus carbon fibers in the field of national defense, their preparation technology has been blocked at home and its products are also banned in the country.
Founded in 2008, Ningbo Materials Special Fiber Division started with high-performance carbon fiber as its research target. Relying on the national engineering laboratory of carbon fiber preparation technology of National Development and Reform Commission and carbon fiber detection and characterization platform of NDRC, it has successively broken through the high-strength medium carbon fiber pilot And engineering technology. At the end of 2014, the division started to develop high-strength and high-modulus carbon fibers. M50J grade high-strength and high-modulus carbon fibers were successfully prepared in May 2015. After testing in aerospace, aerospace and nuclear energy units, the tensile strength and tensile modulus were up to 5.12GPa, 475GPa, the performance reached or surpassed similar foreign products, followed by a continuous and stable production. At the end of 2015, the division carried out the research and development of M55J high-strength and high-modulus carbon fiber at a higher level and successfully achieved its preparation technology breakthrough at the end of January 2016. At present, Ningbo Materials Institute already has continuous and stable production capacity of M40J, M46J and M50J grade products, and has formed M55J high strength and high modulus carbon fiber preparation technology.
Though the domestic M55J grade high strength and high modulus carbon fiber meets or even surpasses the similar foreign products in the main performance, senior engineer Zhang Yonggang believes that it is still necessary to solve the problems such as the stable production of M55J grade domestic carbon fiber and the matching of fiber and matrix in the processing of composite material. To this end, in the future work, Dr. Wang Xuefei, Dr. Qian Xin will focus on high-strength high-modulus carbon fiber structure and performance of the stabilization, fiber surface structure design and performance of composite materials and other fields to carry out research work.
It is reported that special fiber division will be in the realization of M55J-class high-strength high-carbon stabilized carbon fiber production at the same time, follow-up will carry out M60J-class high-strength high-carbon fiber research and development work.
M55J grade high strength and high modulus carbon fiber and fabric prepared by Ningbo Materials
Sms Spunmelt Nonwoven Production Line
The sms non-woven fabric production line is used to produce polypropylene fiber spun webs and hot-rolled reinforced non-woven fabrics. Using polypropylene as the main raw material, supplemented by color masterbatches and additives such as anti-oxidation, anti-pilling, and flame retardant, we can produce polypropylene spunbonded hot-rolled non-woven fabrics with different colors, different properties, and suitable for various purposes. It has different uses and is widely used in medical treatment, sanitation, agriculture, construction, geotechnical industry, making non-woven protective clothing, etc.
Various special treatments are carried out on non-woven fabrics to meet the requirements of customers for various special properties of non-woven fabrics. The treated non-woven fabric has anti-alcohol, anti-blood, and oil-resistant functions, and is mainly used in medical surgical gowns and surgical drapes. Antistatic treatment: Antistatic non-woven fabrics are mainly used as materials for protective equipment that have special environmental requirements for static electricity. Absorbent treatment: Absorbent non-woven fabrics are mainly used in the production of medical consumables, such as surgical drapes, surgical pads, etc. Flame-retardant treatment: Flame-retardant non-woven fabrics are widely used in furniture products and aviation products. Antibacterial deodorization and photocatalyst effect treatment: This kind of non-woven fabric is mainly used in the field of household products. Anti-ultraviolet treatment: Anti-ultraviolet, anti-aging non-woven fabrics are mainly used in agricultural covering fabrics, car covers and other fabrics where sun protection and anti-aging effects are required. Fragrance treatment: Fragrance non-woven fabrics are used in sanitary products (mint, lemon, lavender, etc.).
The composite production line can be replaced with different configurations to produce S, SS, SSS and other series of products to meet the needs of customers in the polypropylene spunbond non-woven market for different purposes.
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