Protein fiber micro-suspension energy-saving and environmentally-friendly dyeing technology is suitable for dyeing processing of protein fiber (including wool, cashmere, silk, soy protein fiber and yak wool) by hair reactive dyes, acid dyes, neutral dyes and acid complex dyes. The core of the technology is the self-developed micro-suspension auxiliaries in the dyeing process, so that the dye granules can significantly enhance the fiber adsorption capacity after micro-suspension, so that the dyeing time is greatly shortened and the amount of waste dyes is significantly reduced, achieving energy saving and environmental protection.
The project is a project of “Environmental Dyeing Technology and Nano-composite Dyeable Functional Fiber Development†(“10th Five-Year Science and Technology Research Projectâ€, which has been accepted) and “Dyeing and Finishing New Technology and New Soybean Protein Fiber Processing Technology Research Project†(National “ The "10th Five-Year Science and Technology Research Project" is in-depth and continuous. The technical achievements were recognized by the expert appraisal committee as “with independent innovation and at the international leading levelâ€. In addition, this technology has been jointly listed by the National Development and Reform Commission, the Ministry of Science and Technology and the Ministry of Commerce in 2004 as the “Priority of the Priority Development of High-tech Industrialization Key Areas Guide†as a key new technology.
Technical points:
The initial dye bath temperature of the technology can be maintained at 25 to 35 ° C, without artificial heating, the micro-suspension aid is dissolved in the dye bath, and the pH of the dye bath is adjusted to between 4.0 and 4.5 by adding formic acid. After the dyeing bath is circulated for 2 to 5 minutes, the dye solution is dissolved in the dye bath. The amount of dye is in principle consistent with the traditional dyeing process or less than the traditional dyeing process.
The dye bath is cycled for about 5 minutes. When the amount of dye is <1% (owf), the temperature is kept at the above temperature for about 10 minutes to completely absorb the dye. When the amount of dye is >1% (owf), the dye bath can be heated to 40-60 ° C in a dye bath, and the heating rate is about 1.5 ° C / min, so that the dye is completely adsorbed to the fiber.
When the dye is adsorbed to the fiber, the dyeing bath is rapidly heated at a rate of 3 to 5 ° C / minute. When the dye bath temperature reaches 90 to 95 ° C, the amount of the dye is kept for 15 to 40 minutes, and then subjected to water washing and soaping. , the dyeing process is finished.
Economic evaluation:
The industrial dyeing production of protein fiber by micro-suspension energy-saving and environmentally-friendly dyeing technology can shorten the dyeing time by 1/3 to 1/2, and has remarkable energy-saving effect. At the same time, the dye fixing percentage is increased by 10% to 30%, and when dyeing the same color depth, the dye dosage can be reduced by about 10%. In the above case, the amount of waste dye (including waste dyes after soaping and washing) in the dyeing residual bath can be reduced by 10% to 30%. The dye bath is calculated as 10:1, and the waste dye content in the residual bath is ≤0.015% (w/w). Taking into account the dilution effect of the total amount of water discharged during the dyeing process (calculated according to the 10-fold dilution rate), the total waste dye content in the wastewater discharged from the dyeing process is ≤0.0015% (w/w).
Expert Reviews:
The predecessor of this technology, microcapsule dyeing technology, has been successfully operated by Xinjiang Tianshan Wool Textile Co., Ltd. for 9 years. As an improved protein microsuspension dyeing technology, Anhui Fuyang Huayuan Wool Textile Co., Ltd. has been implemented for nearly 1 year. Hangzhou Xibao Group The company has been engaged in silk dyeing for 1 year, and Taiyuan Rishen Industrial Co., Ltd. has been running for 6 months. Production practice activities, the technology has produced significant economic and social benefits for the use of enterprises.
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