Recently, the Ministry of Science and Technology announced the results of the preliminary evaluation of the 2016 National Science and Technology Awards. Among the 284 projects that passed the initial evaluation, there are four major projects in the textile industry. The reporter contacted one of the main accomplishers of the “Key Technology and Industrialization of Ramie Eco-Efficient Textile Processing” project of the 2016 National Science and Technology Progress Award (Recommended Second Prize), which was first evaluated by Prof. Cheng Longzhen from Donghua University. An early version of the project.

"Key technology and industrialization of ramie eco-efficient textile processing" project

One of the main accomplishers: Cheng Longzhen (Donghua University)

How much does it know?

Ramie fiber has the functions of moisture absorption, anti-mildew, anti-bacterial and anti-ultraviolet rays. Castor plants can effectively use the land, have the environmental protection ability of soil conservation and water conservation, and the ecological restoration ability to reduce the heavy metal content of the soil; it can be harvested for 3 to 4 seasons per year, which is a high-yield plant and contributes greatly to textile fiber materials. China accounts for more than 90% of the world's ramie production. It is necessary to strengthen the basic research and industrialization of the ecological, efficient processing and high-end application of ramie fiber to optimize the utilization of natural cellulose resources and to meet the healthy needs of people.

Ramie textile has long degumming process, heavy pollution, high water consumption, heavy environmental load, low spinning efficiency, coarse spinning count, heavy yarn feather, low weaving efficiency, poor fabric quality , low dyeing fastness and itching. The problem is that it is strong and easy to wrinkle. The key technical bottlenecks such as coarse fiber count, high gum content and high lignin content are also seriously hindered the effective implementation of eco-efficient processing of ramie textile.

The project will carry out a series of technological innovations on the cultivation of new varieties of ramie, guam fiber degumming, spinning, weaving, dyeing and finishing, and break through the key technical bottlenecks of processing, and realize the high-end application of ramie textiles in the fields of clothing, home textiles and industrial use.

Five innovations that are convincing:

Innovation point 1:

Eco-efficient biochemical one-step degumming technology. The project adopts the complete degumming process which is different from the semi-degumming of process fiber such as jute and hemp. It has developed a biochemical one-step scouring degumming, high-efficiency direct drainage washing and high-efficiency cutting for the outstanding problems of long degumming process, heavy pollution and high water consumption. Key technologies such as the production of strips form an efficient ecological processing technology from raw hemp to high-quality fine dry hemp.

Innovation point two:

Ramie fiber smoothing spinning technology. The project has developed the ramie long-spinning airflow trough poly-concentrating spinning technology and the ramie short-spinning self-squeezing jet vortex spinning technology for the problems of low efficiency of ramie fiber spinning, coarse yarn count and yarn hairiness. High-efficiency production of spun high-gloss yarn and staple fiber blended smooth yarn.

Innovation point three:

Ramie efficient weaving technology. The project is aimed at the problems of weak sizing effect of ramie yarn, low weaving efficiency and poor quality of fabric. Innovative research and development of ultrasonic pulping and sizing technology and controllable weaving technology to achieve high-quality weaving of high-quality ramie fabric.

Innovation point four:

Ramie fabric dyeing and finishing technology. Due to the high crystallinity of the ramie fiber molecules, it is difficult to obtain a good dyeing effect by the existing dyeing technology; the rigidity of the fiber causes the ramie textile to be severely itchy and easy to wrinkle. The project innovatively developed ramie dyeing technology and comfortable finishing technology to achieve high-end manufacturing of ramie fabrics.

Innovation point five:

Breeding technology of high-yield low-gum ramie new varieties. The project is aimed at the application problems of crude ramie fiber, high colloidal and lignin content, as well as the technical difficulties of high-yield, high-abundance dispersion and strong genetic stability of ramie plant, and innovative research and development of ramie germplasm resources. High-quality trait gene information extraction technology and molecular genetic breeding technology to cultivate high-quality ramie plants.

Industry's most concerned industrialization

The project realized the long-staple 100Nm pure spinning, jet vortex spinning mixed short spinning, the first-class rate of pure hemp fabrics increased by 45%, the ton fiber degumming steam was reduced by 53%, the water consumption was reduced by 48%, and the ramie textile processing ecology and high efficiency were achieved. High quality goals. The various technologies of the project have been widely used in domestic enterprises, leading the technological progress and industrial development of the ramie industry, and the demonstration effect is remarkable.

Project has formed a series of innovative products, ramie products to promote high-end applications, and with the international high-end brands to achieve broad docking. In the past three years, the project undertakes a total of 1.04 billion yuan in new sales and 118 million yuan in new profits, with significant economic benefits. The project has improved the ecological industrial chain of ramie refined processing, realized the high-end of ramie fiber and its products, promoted the development of ramie planting industry, and promoted water and soil management, which is of great social significance.

About project operation

Donghua University is the main lead unit to carry out basic research and industrialization of key technologies;

As the main body of technology realization, Hunan Huasheng Group Corporation forms a close research community with Donghua University, and combines its own research and development advantages, product processing advantages, industrial market advantages, etc., to form an interactive research with Donghua University, pushing products to the extreme. ;

Hunan Agricultural University is a specialized research unit for ramie fabric cultivation. The high-grade ramie basic fiber material must be started by plants. The new ramie varieties with ultra-fine low-glue and low lignin have been developed to provide high-efficiency and high-quality application of ramie fiber. Basic guarantee.