At present, innovation has taken the core position in the overall situation of my country’s modernization construction, and scientific and technological self-reliance and self-improvement are becoming the strategic support for national development. As an important applied discipline, textile has the characteristics of multi-disciplinary cross-convergence and multi-technology cross-border integration, and is an important carrier of strategic technological innovation.
The innovation and development of the textile industry is reflected in the emergent effect of new technologies, new materials and new products, as well as in the driving effect of new infrastructure, new equipment, and new formats, and plays an irreplaceable role in improving the national innovation system and building a strong country in science and technology. effect.
High-performance fibers represented by carbon fibers and aramid fibers and their composite materials, as the key basic materials of the national high-tech industry, are constantly promoting high-speed trains and other rail transportation, new energy vehicles and charging piles, UHV transmission lines and other emerging industries and new Technological progress and industrial upgrading of infrastructure.
In September 2018, at the International Rail Transit Technology Exhibition in Berlin, Germany, CRRC Qingdao Sifang Locomotive and Rolling Stock Co., Ltd. officially released a new generation of carbon fiber subway “CETROVO”, which realizes that the driver’s cab, car body, and equipment compartment are better than raw metal materials. The weight is reduced by about 30%, and the bogie is 40% lighter than the original metal material. It is a model for the large-scale application of carbon fiber composite materials on rail locomotives so far.
At present, CETROVO has completed the line test and operation demonstration, and successfully passed the acceptance.
Carbon Fiber Bogie
In December 2019, the world’s first “Inner Mongolia Ximeng-Shandong” UHV supporting project with carbon fiber composite core conductors used in the whole line – Datang Xilinhot Power Plant’s 1000 kV transmission line was officially connected to the grid and put into operation in Inner Mongolia. The total length is 14.6km, and it is set up with a single circuit. The line adopts the carbon fiber composite core wire independently developed by my country.
The commissioning of the line not only saves energy and reduces operating costs, but also increases the transmission power by 1.32 million kW • h every year, alleviating the shortage of electricity in North China.
1000kV transmission line of Datang Xilinhot Power Plant
In addition, high-performance fibers and their composite materials can also be seen on new energy vehicles and charging piles. New energy vehicles use electricity as the driving power source, and problems such as circuit short circuit or high voltage breakdown need to be considered. Therefore, in addition to insulation voltage resistance and corrosion resistance, flame retardancy also needs to be considered in the selection of materials.
Therefore, carbon fiber reinforced composite materials, long glass fiber flame retardant reinforced polypropylene materials, and PP reinforced composite materials (PPLGF35) have become the primary choices for battery module housings.
Post time: Aug-10-2022
