Analysis on the development of para aramid fiber i

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Analysis of the development of para aramid fibers in the world

I. current situation of new product development

nowadays, the development characteristics of para aramid fibers are to promote the upgrading of applied products with technological progressiveness. DuPont has developed a series of new para aramid varieties, such as ultra-high strength kevlar129, which has 20% higher strength and stronger toughness than kevlar29; The strength of Kevlar k29ap brand of progressiveness fiber is 15% higher than that of standard k29 fiber; The modulus of ultra-high modulus kevlar149 is 25% higher than that of KEVLAR49, and the moisture regain is only 25% - 50% of that of ordinary PPTA Fiber. At the same time, kevlar49hs, a high-strength and high modulus aramid tow, Kevlar ha, a bonded activated aramid yarn used in the rubber industry, and Kevlar protera, a police bulletproof clothing fabric, have also been developed. In addition, DuPont is also constantly exploring new application fields, such as developing light and high-strength Kevlar fibers to improve protection and functionality

Diren company has developed aramid tow twaron1014 and twaron1015, which are specially used for the reinforcement of rubber hoses and conveyor belts. Compared with the standard model twaron1008, in addition to the mechanical properties that are more suitable for the requirements of rubber hoses and conveyor belts, these two products have also been activated. When applied, they can be well bonded to the rubber matrix with only one step of dipping; Twaron2100 is an aramid tow specially developed for transmission belt. Compared with the standard twaron1008, it has a relatively low modulus, improves the bending and compression fatigue resistance, and has excellent dynamic performance; Twaron2300 is specially developed for power hose and high-performance transmission belt, which is characterized by high collusion strength and tensile strength at the same time; The special twaron1008ct ultra-fine aramid fiber for bulletproof can significantly improve the bulletproof performance; The impact resistance of technora T700 fiber is 3 times that of carbon fiber, and its modulus is 2 times that of aramid II. The adhesion with resin is increased by 10%. It can be used as a reinforcing material for carbon fiber composites to improve its impact strength. The new product sulfrontm developed by Teijin company can reduce the rolling resistance of tires by 20%, which means that the fuel consumption is reduced by 5%

German ACORDIS company recently developed high-performance ultra-fine para aramid, which neither burns nor melts, but also has high strength and great cutting resistance. It can be mainly used to produce various textile and clothing equipment that are resistant to high temperature and cutting

Russia has also continuously developed new products in heterocyclic aramid fiber, such as artee fiber, which has a strength of 35cn/dtex, a modulus of 200GPa, and a fiber strength of 5.39gpa after impregnation with epoxy resin

II. Current situation of world para aramid manufacturers

at present, the total production capacity of world para aramid is about 75000 T/A, of which DuPont is the largest production enterprise, with the production capacity accounting for 48.7% of the total production capacity; The second is Diren company, whose production capacity accounts for about 34.7%, and other countries and companies have only a small amount of production. The main manufacturers are DuPont Corporation of the United States (with a production capacity of 24500 tons/year), DuPont Corporation of the United Kingdom (with a production capacity of 7000 tons/year), DuPont Toray Corporation of Japan (with a production capacity of 5000 tons/year), Teijin Corporation of Japan (with a production capacity of 26000 tons/year), Cologne Corporation of South Korea (with a production capacity of 2600 tons/year), Xiaoxing Corporation of South Korea (with a production capacity of 100000 tons/year) Russian heat-resistant company (with a production capacity of 200000 tons/year) and Yantai spandex Co., Ltd. (with a production capacity of 100000 tons/year), etc

III. China's para aramid fiber ushered in the dawn of large-scale development

1 production status

China has started the development of aramid technology since the 1970s, but has never made a breakthrough in key engineering technologies. Domestic demand for para aramid fiber mainly depends on imports, which is seriously restricted by people. The long-term shortage of para aramid fiber supply has restricted the technological progress and industrial upgrading in related fields in China to a great extent. In recent years, with the continuous breakthrough of aramid technical barriers, the industrialization of para aramid fiber in China began to flourish. At present, more than ten domestic enterprises are carrying out the industrialization development of para aramid fiber, including Sinochem Chenguang, Yantai spandex, Henan Pingmei Shenma and Yizheng Chemical fiber

Chenguang Chemical Industry Research Institute Co., Ltd. has always been in the forefront of localization in the research and development of aramid fiber. In terms of heterocyclic aramid, after years of research and development, Chenguang Institute has broken through a number of technical difficulties, and has achieved the stable production of 5t/a aramid III, with the fiber strength reaching 4 Above 5gpa, the products have passed the national acceptance, and have been successfully replaced by localization on some types of weapons. In terms of aramid II, Chenguang Chemical Research Institute has solved the key technical problems of continuous polymerization and high-speed dry wet liquid crystal spinning, and has built a 30 ton/year pilot production line. In the research and development process of the above aramid II sensor with high precision I and aramid II, Chenguang Institute has accumulated rich experience in R & D and engineering practice, and has applied for a number of patented technologies with independent intellectual property rights. In the middle of 2009, Chenguang Research Institute Co., Ltd. began to build a 1000 ton para aramid project in Chengdu Xinjin Industrial Park, and it is expected that the unit will be officially put into operation this year

Yantai spandex Co., Ltd., the largest special fiber production base in China, has also made significant progress in the research and development of para aramid. In 2004, Yantai spandex Co., Ltd. officially launched the pilot technology development and research of para aramid filament and pulp, and built a 100 ton pilot production line in 2007, which broke through the core key technology of para aramid, formed independent intellectual property rights, and passed the expert technology appraisal organized by Shandong Provincial Department of Science and technology. In 2008, the company launched the 1000 ton/year para aramid engineering project. In May, 2011, the 1000 t/a para aramid project produced qualified products

Donghua University began the research on aramid fiber after 2000. In 2006, Shanghai aimeida Fiber Technology Co., Ltd. was established with two private enterprises, and a pilot plant with an annual output of 100t was built in Changshu best leather Co., Ltd

at the end of February 2009, China Pingmei Shenma Group expanded the annual production capacity of Fanglun to 1000 tons on the basis of the original 500 ton unit. It is expected that the unit will initially try to put polyurethane into production as the internal filler of all kinds of rope fabric in 2012

at the end of 2008, Sinopec Yizheng Chemical Fiber Co., Ltd. began construction of a 3000 ton para aramid unit in Yizheng City, Jiangsu Province, with a total investment of 1.1 billion yuan. The main project includes an annual output of 3000 tons. 4 If there are para aramid fiber, 3000 tons of para aramid filament spinning device and 30000 tons of solvent recovery device in the box. It is expected to be completed and put into operation in 2012

in addition, Guangdong Caiyan Co., Ltd., Hebei Silicon Valley chemical company, Henan Pingmei Shenma Group, Changshu Suzhou Zhaoda special fiber technology Co., Ltd. are also building or planning to build a certain scale of para aramid production plants. It is expected that by 2015, China's production capacity of para aramid will reach about 15000 tons, becoming an important para aramid production country in the world, which will meet domestic demand to a large extent

2 development prospects and suggestions

para aramid is an important new material, which is supported by national policies. In October 2010, the State Council issued the decision on accelerating the cultivation and development of strategic emerging industries, which clearly proposed to focus on the development of new materials such as aramid high-performance fibers and their composites. In the next 10 years, the domestic automobile, communication, high-speed railway, aviation, protection and other fields will develop rapidly, and the demand for para aramid fiber will show a strong situation. At the same time, the industrial transfer of foreign downstream processing enterprises to China will also stimulate the growth of domestic demand for para aramid. It is estimated that the demand for para aramid fiber in China will exceed 10000 tons in 2015 and 20000 tons in 2020. Therefore, para aramid fiber has a good market prospect in China, focusing on strategic emerging industries, major projects of national economic construction, national defense and military industry, and structural upgrading and adjustment of material industry. In the next few years, the production capacity of para aramid fiber in China will usher in a stage of rapid improvement. In addition, according to the 12th Five Year Plan, during this period, China's 1000 ton para aramid production technology will achieve a breakthrough and enter a rapid growth period, thereby driving the rapid development of related industries

although China has also carried out the localization research and development of para aramid fiber, and has made some progress, the localization process of para aramid fiber in China is still relatively slow and does not have the capacity of large-scale competition because the key engineering technology, production technology of main raw materials, processing and manufacturing technology of key equipment for the production of para aramid fiber have not been well solved. To this end, the state should strengthen macro-control, concentrate its advantages and speed up the industrialization of para aramid fiber. At the same time, in order to break through the key technologies as soon as possible and realize the stable and reliable localization of the performance of special equipment and additives, it is necessary for the state to continue to increase the financial support for key scientific and technological projects, and promote the rapid transformation of scientific and technological achievements into productivity through the alliance of industry, University, research and application, so as to cultivate a relatively complete upstream, middle and downstream industrial chain, so as to realize the real localization of para aramid fiber. However, it should also be noted that compared with other conventional chemical fiber products, para aramid products have the characteristics of high technical content, high capital threshold and high market risk, and their downstream market development and application are limited to a few fields with high requirements for material performance. Therefore, relevant national departments should make overall planning, rather than blindly develop, in order to avoid killing each other, It affects the steady and healthy development of para aramid and its related industries in China

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