Turning waste textiles into treasures, winning the National Science and Technology Progress Award

Qian Jun, deputy general manager of Ningbo Dafa Chemical Fiber Co., Ltd., who just got the award certificate, left second, the picture is provided by the enterprise

People's lives are inseparable from textiles. The data shows that the social stock of China's waste textiles has exceeded 100 million tons, and is still increasing at a rate of more than 2,000 tons per year, and the proportion of effective reuse is less than 10%.

With the innovative project of “efficient recycling of waste polyester and industrial integration of fiber preparation”, Ningbo Dafa Chemical Fiber Co., Ltd. has found a solution for the efficient reuse of waste textiles. At the National Science and Technology Awards Conference held on January 8, Dafa Chemical Fiber won the second prize of National Science and Technology Progress Award as the first completion unit of the project, and filled the manufacturing industry in Ningbo for 7 years. A blank for completing the unit.

Entering Dafa Chemical Fiber Co., Ltd. located in Binhai 2nd Road, Hangzhou Bay New Area, Ningbo, the factory area is neat and clean, and the air is fresh. It is hard to believe that this is a chemical fiber enterprise.

“Recycling of recycled fiber, especially the reuse of polyester fiber ( polyester ) textiles is a recognized big problem in the industry.” Xing Xiquan, head of Dafa Chemical Fiber Technology, told reporters that in the past, the industry used physical opening and simple disinfection methods. The textiles are opened and reused. This method is not environmentally friendly on the one hand. On the other hand, the quality of the fiber products produced is not high, and the added value is very low. “It hardly makes money.”

There is demand in the market, and there is no precedent in the industry. What should I do? Can only be independently developed.

In 2006, Dafa Chemical Fiber became the first company in the industry to apply liquid phase thickening technology to the reclaimed spinning process, which made it possible to produce high quality polyester melt.

“Recycling of polyester fiber, to put it plainly, is to make waste polyester fiber into a melt and re-form it into fiber. One of the key technical difficulties is to improve the spinnability of the fiber, and the viscosity is a measure of melt spinnability. A key indicator of sex." Xing Xiquan introduced, in order to achieve this goal, for many years, Dafa Chemical Fiber combined with colleges and universities and upstream and downstream enterprises, quietly did a lot of basic technology research and development.

“For example, in order to facilitate the recycling of waste polyester textiles, we have developed a hydrothermal synergistic plastic granulation technology. In order to accelerate the volatilization of low molecular substances (small molecules such as dyes, slurries and thermal degradation), we have adopted innovative Micro alcohol solution technology." Xing Xiquan told reporters that in recent years, the enterprise technology research and development team has successively overcome many technical problems such as multi-level high-precision, large-capacity spinning, reclaimed polyester composite spinning, and Dafa Chemical Fiber has melted The key technologies of the industry represented by quenching and tempering are firmly in their hands.

After a series of innovative preparation processes, Dafa Chemical Fiber successfully realized the recycling of “from fiber to fiber” for a pile of waste polyester fiber fabric. The quality is comparable to that of original polyester fiber, but the cost is much lower than that of virgin fiber and recycled fiber produced by international advanced technology, which makes Dafa Chemical Fiber's products highly competitive in the market. At present, Daihatsu chemical fiber recycled polyester staple fiber production capacity reached 25 million tons, is expected 2019 sales of 3.0 billion.

“The development and replacement of polyester recycled fiber technology is very fast. We are currently using more efficient chemical methods to prepare higher quality short fibers. It is expected to be industrialized in the near future.” Xing Xiquan introduced.