Textile Industry News: Paint Dyeing Four Difficult Problem, A Technical Solution.

The picture is made of yarn dyed with multi coloring and new yarns. Fabric And shirt

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　　 Spin The industry is one of the major industries that emit industrial waste water in China, ranking sixth in the list of industrial wastewater. The amount of printing and dyeing wastewater accounts for 80% of the textile industry wastewater discharge, and the composition of printing and dyeing wastewater is complex and changeable, with deep color and large alkalinity.

Dyeing and finishing of knitted and dyed yarns is an important part of the textile industry. At present, the yarn used for knitting, yarn dyed and denim fabrics at home and abroad mainly uses the technology of hank dyeing, cheese dyeing, warp dyeing, dyeing, dyeing and dyeing. The water consumption and the amount of waste water generated are large and the energy consumption is high.

Pigment dyeing is a kind of dyeing technology with less pollution and simple technology. At present, the dyeing and finishing of clothing and fabrics are relatively mature. However, there are four main problems in yarn dyed dyeing, because the yarn is not easy to carry out continuous pretreatment and high temperature fixation.

First, the poor color fastness of the products, especially the rubbing fastness, is far from the quality level of the national standard and the dyed products such as reactive dyes.

The two is the core penetration of the product is poor, the yarn surface dyeing is higher while dyeing, but the inner coloring of the yarn is low. Because of the distortion and twist of the yarn, the inner core is exposed to the surface, resulting in poor surface uniformity and unattractive appearance.

Three, the depth of the product is poor, and it can not help deep dyed dyeing.

Four, the product feels firm and comfortable, and has a strong sense of skin irritation.

These four problems have puzzled the relevant researchers for many years, and have not been effectively solved, seriously hindering the application of pigment dyeing technology in the field of yarns.

　 Four difficult problems in pigment dyeing: a technical solution

Dyed dyeing and Finishing Technology Co., Ltd. and Wuhan Textile University jointly developed the multi colored new yarn dyeing technology and equipment. In view of the four problems of poor dyeing fastness, poor penetration, poor depth and hard handle in the dyeing of yarn, corona discharge was used to realize the rapid modification of yarns. The ultrasonic wave cavitation was used to improve the permeability and uniformity of the modifier. The yarn modifier was screened and the synergy between the coating and the fiber was strengthened through the synergistic effect of the binder, coupling agent and fixing agent. The color fastness, uniformity and dyeing depth of the dyed products were improved effectively, and the innovative dyeing technology was formed. A special equipment for continuous dyeing of the continuous yarn dyed fabric was developed. Zhangjiagang three

According to Ma Xinhua, chairman of Zhangjiagang Suntory dyeing and finishing technology company, the biggest feature of the technology is that it is difficult to carry out continuous pretreatment and pretreatment of high temperature color fixedly, and creatively applies many modern physical techniques to achieve continuous dyeing of yarns. The technology integrates 10 national authorized inventions, has complete independent intellectual property rights, and has passed the appraisal of scientific and technological achievements organized by the China Federation of textile industry. The conclusion of the appraisal is that the project has made breakthroughs in the technology of yarn dyed dyeing, and the overall technology has reached the advanced level in the world.

According to Ma Xinhua, the technical effect is mainly reflected in three aspects: first, it thoroughly conquered the technical problems of poor color fastness, poor penetration, poor depth and hard touch of the yarn dyed fabric, and achieved the overall quality of dyeing. The dry, wet and wet rubbing fastness of shallow, medium and dark color reached 4 level /3~4, 3~4 grade /3 and 3~4 grade /2~3 respectively, and the penetration and dyeing depth were obviously improved. The two is to substantially reduce pollution emissions from the source. The effect of water-saving and emission reduction is obvious, basically realizing the micro water consumption and near zero discharge in dyeing process. At present, the amount of water intake, waste water production and COD generated by dyeing production is no more than 1.6 tons / ton yarn, 0.2 ton / ton yarn, 0.3 kg / ton yarn, respectively, compared with the advanced level of international cleaner production stipulated in HJ/T185-2006 "cleaner production standard Textile Industry (cotton printing and dyeing)", compared with 100 tons / ton yarn, 80 ton / ton yarn, 50 kg / ton yarn, 98%, 99%, 99% respectively. Three, in addition to producing plain dyed yarn, it can also produce dyed yarn with color section, color dots and other flower shaped effects, and can synchronize dyeing of cotton, polyester, hemp, nitrile, wool and other components blended yarn.

These yarns can be derived from the downstream dyed weaving, knitting and denim fabrics, and can be combined with various fashionable and innovative fabric designs.

　　 Bottlenecks in R & D Wuhan Textile University To help.

According to Ma Xinhua, cooperation in production, teaching and research was formed after difficulties encountered in the company's project research and development. In the early stage of the project, the company developed its own technology for dyeing and dyeing of yarns for nearly two years. After encountering technical difficulties, it sought help from Wuhan Textile University Xu Wei Lin, and received the support of Professor Xu's team, and gradually built up a cooperative system of production, teaching and research.

In the cooperation of industry, University and research, Suntory Company has mainly made ultrasonic cavitation modification, the screening of related auxiliaries, and the development of dyeing process and equipment. Wuhan Textile University has done basic research, related auxiliary properties research and yarn rapid corona modification research and development. {page_break}

Yarn production has added value to distinctive downstream products.

It is understood that in June last year, a production scale of 1000 tons / year yarn dyeing production line has been put into operation in Suntory Company. Since the launch of the project, the impact of the product has been improving rapidly in the market.

In the downstream application of the products, Suntory Company and Jinling textile, Luen FA textile and Nantong long Di cooperate to develop the positioning dyed fabric. The fabric is made of dyed yarn dyed by Suntory Company, which is embedded in yarn dyed warp yarn for warping and weaving, and produces yarn dyed fabric with creative effect. The uneven length of the flower effect and creative pattern add visual elements and leisure interest to the fabric visually, which greatly improves the fabric's grade and price, and is well received by consumers.

Suntory Company has also carried out the development of knitting fabrics with many companies such as Cathay, Huasheng, Dexin and Xin Fang textile. It has used various fancy yarns such as yarn dyed yarn, yarn dyed yarn, colored yarn and hazy yarn to be woven into circular knitting machines and flat knitting machines. A variety of fashionable knitted products have been developed and recognized and welcomed by customers. Through cooperative development, a variety of yarn dyed knitted fabrics were selected for China's popular fabric selection.

Over the years, we have been committed to the development of yarn dyed fabrics and have certain influence in the domestic market. At the beginning of this year, we began to cooperate with the Suntory Company to sign the contract. The dyed yarn of the dyed fabric will be dyed in one flower and three colors, and the dyed fabric will be developed in batches. At present, more than 100 fabrics have been developed, and more than 40 million fabrics will be produced. The dyed yarn of the positioning section has its unique product characteristics. Combining these characteristics with our company's rich flower pattern development experience and mature sales channels, we can open up a wide fabric sales market. We will continue to intensify our efforts in this area. Tang Xiwen, general manager of Nantong long Di Textile Co., Ltd.

The dyed floral dyed yarn produced by Suntory Company is very characteristic. Segments, coloured dots and hazy yarns can be produced. We have developed a customer friendly welcome through cooperation with 70% of its ingredients and 30% of nylon and nylon. clothing We have successfully supplied to our customers. This product not only has the concept of eco environmental protection, but also has unique space and great space for creative design.

At the same time, the development of downstream fabrics and garment patterns is very important for the application of paints and dyed yarns. Through the cooperation between upstream and downstream, we can provide a large number of new and green new products for the market. Jiangsu Guotai Huasheng Industrial Co., Ltd.

We have accumulated many years of experience in the dyed weaving industry, and have developed a large number of new varieties and new flower types every year. When our product developers saw the dyed yarns made by Suntory Company, they were thinking about how to apply them to yarn dyed fabrics. We first proposed to Suntory Company that the dyed yarns were dyed after being dyed, and their dyeing characteristics were maintained. They were directly inserted into yarn dyed warp yarns without warping and weaving. After passing several samples, they were finally successful and received recognition and orders from foreign customers, thus opening up new applications and new fields of dyed yarn for coloring fabrics. This yarn dyed fabric has great development space and market space. We will continue to cooperate with Suntory. Huang Shengliang, chairman of Zhangjiagang Jinling Textile Co., Ltd.