The Key Technology Research And Industrialization Of Natural Colored Silkworm Cocoon Filament

"Animal

Today, many years of research efforts have finally come to fruition. "The research and development of the key technology of natural colored silkworm cocoons silk" has not only been selected as the first prize of science and technology of China Textile Industry Association in 2011, but also promoted the cocoon silk undertaking of independent innovation in China to a new height.

In this issue, Professor Xu Shiqing will introduce in detail the key technologies of the project and the application of industrialization.

"Innovating silkworm varieties through genetic modification and innovating the characteristics of silk protein fiber materials to achieve the innovation of cocoon silk products."

Reporter: white silk cocoons have been used in the production of modern silk industry. The technology of cocoon and silk processing is all based on white mulberry silk. So what are the main technical characteristics of white mulberry silk? What are the disadvantages?

Xu Shiqing: there are three main disadvantages. First, white mulberry silk is always dependent on chemical dyeing to produce colored silk products. There are a large number of printing and dyeing wastewater. The products are chemical dyes and drug residues. Two, the machine is widely used for cocoon processing, silk reeling and weaving. There are high requirements for cocoon, silk, silk length and silk content in raw silk cocoons. Three, in order to obtain the silky texture of silk, it is necessary to remove the sericin protein which accounts for 20%~30% of raw silk weight.

With the annual production of 100 thousand tons of silk in China, the sericin protein flowing into the water every year exceeds 20 thousand ~3 million tons, worth nearly 20 billion yuan, which is a great waste of resources and an environmental pollution source.

Reporter: Based on these disadvantages, what are the advantages of R & D and application of natural colored cocoon silk? What are the technical problems encountered in the process of R & D?

Xu Shiqing: the background of our project is to develop the silkworm cocoon material with natural color and the textile products such as colored silk and silk, which are in line with the requirements of modern silk industry. At the same time, in the process of processing, we integrate innovative technology and recycle sericin efficiently.

The difficulty of the project is that we lack direct basic research materials, and have no systematic industrial technology and technology.

Reporter: How did your project team break through these bottlenecks?

Xu Shiqing: relying on national scientific research cooperation and industry university research cooperation, we have organized a platform for the industrialization of natural colored cocoons.

The silkworm variety was innovated through genetic modification, and the cocoon silk product innovation was realized by innovating the characteristics of silk protein fiber material.

技術攻關主要集中在：第一，通過構建國際領先水平的繭色基因發掘、分子標記與遺傳圖譜等分子育種技術平臺，創制高水平符合現代絲綢工業生產要求的繭形、絲質、絲長和絲量等天然彩色繭桑蠶品種，突破天然彩繭優質原料生產的行業技術瓶頸，新蠶品種還要符合現代農業高效、強健、優質的高水平動物品種要求;第二，以天然彩色繭絲分子結構與特性、色素成分與轉運規律等基礎研究為依托，通過多學科交叉研究，創新蠶繭加工、制絲、絲織、絹紡、精練、產品開發等領域的技術理論和方法，突破天然彩色繭深加工過程中色素嚴重流失、產品顏色不勻和出現色斑，色牢度、柔韌性和服用性差等國際性技術難題，實現高品質產品產業化生產;第三，在天然彩色絲綢避免了染色這一主要產生污染排放工序的基礎上，進一步集成應用生物工程技術高效回收絲膠蛋白質

And production wastewater.

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On the technical proposal, we have focused on solving the problem that there is no natural color cocoon in the silk industry to carry out production technology research and product development, cocoon production without silkworm eggs. The silkworm breeding has become the starting point for starting the research and industrialization of natural coloured cocoons. The product development and raw materials development are carried out at the same time.

This technical scheme is the first practice in the field of animal fiber breeding. It is faced with the problems of huge system, high technical difficulty, long development cycle, and high market risk, but it is also the most effective and economical technological innovation of animal fiber.

Industrialization is becoming fruit and rich peasants are strong.

"387 thousand raw material cocoon production increases farmers' income by more than 20.

Silk enterprises are rapidly growing into the leading industry. "

Reporter: so far, what is the industrialization degree and achievement of the natural colored silkworm cocoon silk project?

Xu Shiqing: we have established a system standardized, simple and feasible industrial production technology system of natural color cocoon and high quality raw materials, and an industrial operation mode of "company + research institutes + base + farmers". We have built large-scale natural colored cocoon raw material production base in 6 provinces and municipalities of Jiangsu, Zhejiang, Guizhou, Sichuan, Chongqing and Jin, and exported the technology to Kampuchea successfully. The products directly targeted at foreign green products market and domestic high-end gift market, and increased the income of 387 thousand raw material cocoon producers by more than 20%.

At the same time, we have established and practiced the production mode of energy saving, emission reduction and circular economy of natural colored silk and products, and invented the rapid identification technology of natural colored silkworm cocoon and silk. It does not require professional equipment, and only uses special identification reagents. The identification is only 1 minutes at a time, and the cost is only about 0.1 yuan.

Reporter: for enterprises, how much is the cost of introducing the technology? What benefits can they bring to the application enterprise?

Xu Shiqing: the cost of raw cocoon production is lower than that of the same grade white cocoon. Besides raw silk cocoon production cost increased by 10%~20%, raw silk production is equivalent to other white silk production. Besides the increase of raw silk cost, the cost of dyeing production is lower than that of dyed silk textile production.

Take Xinyuan Cocoon Silk Group Co., Ltd. as an example, the company applied the whole technology in 2005 ~2010.

The level of enterprise has significantly improved. The sales income of cocoon silk has increased by 30%, 32%, 34%, 10% and 12% in the past 5 years.

Industrial products, "natural colored silk", have been awarded the certificate of high-tech products of Jiangsu province. The "gold colored silk underwear" and "natural colored silk nightgowns" have been awarded the "gold medal of innovative products" of the China Silk Association, which has strongly supported the construction of the National Silk and cocoon Silk Industrial Engineering Research Center, led by Xinyuan group, and the social impact and product popularity of the enterprises have expanded rapidly.

Reporter: what are the economic and social significance of the success of the project in the future development of the silk industry?

Xu Shiqing: the natural colored silk project has the competitiveness of raw cocoon production; its deep processing equipment makes full use of white cocoon processing equipment, significantly reduces the input of industrial production, and the quality of raw silk products reaches the level of 5A or above. The silk fabric completely solves the technical bottleneck problems of pigment loss, uneven color, poor color fastness, flexibility and wearability. The product has broken through the scope of foreign major production crafts and decorative silk fabrics, and has directly entered the underwear and home textiles market, and has played the greatest role in the natural color silk products. Relying on natural coloured cocoon raw materials, it has a demonstration significance for cocoon silk energy saving and emission reduction and circular economy production mode.