North Clothing Tests Three Technical Challenges To Overcome

< p > recently, the pilot test of recycling and reuse of used military uniform carried out by the general Quartermaster Research Institute and Beijing Institute Of Fashion Technology and other units has successfully completed the pilot test in a company in Zhejiang. When the reporter tried to interview the parties of the project's production, study and research, the company declined the reporter's interview request. Reporters can understand that enterprises protect the intellectual property rights and prevent the leakage of technical secrets, because the pressure of being the first person to eat crabs is imaginable. < /p >
< p >, therefore, the reporter interviewed the scientific research leader of the project, Professor Zhao Guoliang, School of materials science and engineering, Beijing Institute Of Fashion Technology. According to him, recycling and reuse of waste textiles are mainly faced with three major technical problems. Through collaboration with enterprises, many technical bottlenecks have been overcome, and the pilot tests have been successfully completed. < /p >
What are the problems that need to be overcome when recycling and reusing waste textiles? When can people wear recycled clothing made of recycled waste clothing? With these problems, the typical case of this period will help you uncover the veil of the secret technology of waste textiles recycling and reuse. P < /p >
< p > three technical difficulties need to be tackled < /p >.
< p > first, how to identify and classify the waste textiles accurately when recycling the waste textiles comprehensively. Because of the wide variety of materials and the different ways of dyeing, the identification and classification of clothing with different materials is a prerequisite for the comprehensive recycling of waste textiles. The technology of comprehensive recovery and reuse of waste textiles is to accurately detect the composition and proportion of waste textiles, and determine different methods according to the proportion of different components. < /p >
< p > Second, there are not only many kinds of waste textiles, but also various kinds of fiber components, such as cotton, wool, silk, hemp, chemical fiber and blended fabric. Usually, if the waste textiles are made of natural fibers such as cotton, wool and hemp, after recycling, they can be made into composite materials, thermal insulation materials and filling materials. After reprocessing, chemical fiber clothing can be used as regenerated fiber. Because of the wide range of raw materials and the unstable quality, mixing different ingredients with different proportions and different proportions of raw materials, how to make unstable raw materials produce stable quality, spinning chips is the key to the whole production process. < /p >
< p > Third, as we all know, the color of the waste textiles is various and the dyeing methods are different. The colorful waste textiles are generally black through the technology of comprehensive recovery and reuse of waste textiles. However, the color of chips produced by the comprehensive recycling technology of waste textiles will not always be black in the future, and the setting of the color of slicing is also one of the problems to be solved. < /p >
< p > series of key technologies emerge at the historic moment < /p >
< p > although faced with various technical blanks, through the research of waste military uniform recycling technology carried out by the general Quartermaster Research Institute and Beijing Institute Of Fashion Technology and other units, we have explored various recycling schemes of waste textiles and tackled a series of key technologies. These technologies include fluffy textile thickening, alcoholysis and repolymerization process and equipment, polyester cotton separation technology and so on. < /p >
< p > waste textiles comprehensive recovery and reuse technology is a systematic engineering technology combination, which mainly includes: the establishment of various qualitative and quantitative models of textile spectrum, rapid identification of ingredients, disassembly and sorting technology of waste textiles, bulk density technology of loose fabrics, reduction and repolymerization technology, separation technology of blended components, spinning technology of high fiber containing materials, cotton and felt technology of waste textiles, and key technologies of application of regenerated waste textiles in the field of taking and industrial textiles. < /p >
< p > aiming at the problem of identifying the components of waste textiles, the general military research institute and Beijing Institute Of Fashion Technology used near infrared spectroscopy to determine the raw material composition of fabrics, and quickly judged the composition of raw materials and the proportion of various components by means of instrument scanning. At present, the accurate identification of polyester and polyester cotton blended fabrics has been realized, and the small portability of the equipment has been realized. < /p >
< p > at the same time, because clothing is a fluffy raw material, how to compact the garment is also a key problem. For this reason, Beijing Institute Of Fashion Technology has also carried out research on the density technology of bulky textiles, in order to improve the efficiency of continuous recovery and reuse of waste textiles. < /p >
< p > popularization is expected to be popularized in the next two years. < /p >
< p > it is understood that the general Quartermaster Research Institute, Beijing Institute Of Fashion Technology, Shanghai poly friend chemical company and Zhejiang Fuyuan renewable resources Co., Ltd. have established a recycling base for waste textiles in Zhejiang Zhuji through the cooperation of industry, University and Research Institute. Using waste textiles, such as crushing, alcoholysis and repolymerization, the waste polyester clothing is continuously made into regenerated polyester chips, and polyester staple fiber or filament has been prepared. < /p >
< p > Zhao Guoliang introduced that the technology is currently in the pilot stage. It is believed that by adjusting and optimizing the process and equipment, the quality of products can be further improved and production costs reduced, providing a guarantee for large-scale mass production of waste textiles in the future. It is estimated that the comprehensive reuse technology of waste textiles will be gradually promoted in China in the next 2 years. < /p >
< p > according to the average life expectancy of a garment 3~4 years, if our country every year on the basis of buying 5~10 new clothes per person per year, each person will abandon 3~5 old clothes every year. The average annual garbage output per capita in China's cities is 440 kilograms, and the total annual garbage volume is 1.5 billion tons. According to statistics, the waste textiles in China's urban refuse account for 3.5%~4% of the total waste materials. According to the prediction of China Resources Comprehensive Utilization Association, by the end of 12th Five-Year, the total volume of waste textiles in China will exceed 1 billion tons, of which 70 million tons of chemical fiber and 30 million tons of natural fiber. < /p >
< p > it is estimated that with the annual output of 26 million tons of waste textiles and the comprehensive utilization rate of 60%, we can save 9 million 400 thousand tons of chemical fiber and 4 million 700 thousand tons of natural fiber, so that we can save 18 million 800 thousand tons of crude oil every year and save 10 billion 893 million 330 thousand square meters of cultivated land, accounting for 46% of the total annual cotton ploughing, and will greatly reduce the import dependence of China's textile raw materials. < /p >
In the < < p > > development plan of the textile industry 12th Five-Year, it is clearly pointed out that the recovery rate of waste textiles will reach 20% to 40% at the end of 12th Five-Year, and nearly 500 recycled production lines can meet the needs of processing. In this process, the waste textile recycling industry will produce output value of nearly 10 billion yuan. < /p >
< p > this shows that the technology of comprehensive recovery and reuse of waste textiles has broad prospects. I believe that in the near future, people will be able to wear recycled clothing made of recycled waste clothing. < /p >