Relevant experts believe that silk printing and dyeing technology must focus on the four major themes of silk products - high quality, high efficiency, energy saving, and environmental protection. Among them, the following five technologies should be researched and developed:
First, the cold-rolling reactor silk refining technology cold-rolled reactor technology in cotton printing and dyeing with reactive dyeing and cotton desizing in the success of the cold-rolled reactor water-saving energy-saving advantages are very significant, generally welcomed by printing and dyeing enterprises, and are widely used . Some people in the country have been studying the process of this technology transplanted silk degumming refining process up. If this technology is applied to the silk production process, not only will it save a lot of water and steam, but it will also greatly reduce the damage caused by the traditional refining equipment to silk, such as ash damage, hanging prints, and creases. Environmental protection and improving product quality will be of great benefit. Tests have shown that in a temperature of 35°C, thin, low weft density satin can be degummed in 24 hours (traditional process requires high temperatures of 96-98°C under micro-brain conditions to complete the refining, which takes 5-10 hours). It takes 96 hours for the thick and high density silks to reach a degumming rate of about 23%. From the results of practice, the application of cold pad technology is not only long in time, but also the whiteness is not enough. It seems that we must really realize the industrialization of cold pad piling technology on silk products. The key is to research and develop more than the current degumming glue. More efficient refining agents or refining enzymes, and the time to fall within 24 hours, to achieve this, the cold-rolled pile of silk has industrial value.
Second, spray dyeing technology has developed a foreign air atomization dyeing technology, this technology is in the dyeing process, the dye additives and gas flow through the high-temperature atomization device, directly after the atomized dye in gaseous form Spray on the fabric. The operation of the fabric is completely dependent on the circulation of the air flow, which smoothes the running fabric. When the atomized dye comes into contact with the fabric, the dye expands on the surface of the fabric and permeates into the interior of the fiber due to the constant condensation, and the process is repeated until the dyeing is completed. Compared with conventional dyeing, this technology has the following advantages: (1) The bath ratio is as small as 5-10 instead of the conventional 1:30-50; (2) shortens the dyeing time by 40%-50%; (3) the fabric runs without Tension; (4) Energy-saving and wastewater treatment costs; (5) Avoid the occurrence of disease in conventional dyeing machines and improve dyeing quality; (6) Due to the tension-free operation, fabrics have a special softness and drape. This technology operates at 15-30 M/min instead of 150-70 M/min. There are some companies in the country that are embarking on improvements in equipment and processes. In general, it is advisable to use spray dyeing techniques to achieve a leveling effect on the face.
Third, paint printing technology Cotton, polyester cotton fabrics using paint printing in the global share of printing has accounted for about 50%, paint printing fixed mainly rely on adhesives and cross-linking agent reaction to form a macromolecular film layer, the paint adheres to the fiber On the surface, the drawback of this type of printing is that the fabric feels hardened. The key technology of silk coating printing is that it has not yet found a good adhesive. It is necessary to make the coating firmly adhere to the surface of the real silk, and the color fastness is up to the national standard, while ensuring that the softness of the real silk is not affected. At present, the adhesives used in the market are mainly polypropylene and polyurethane. In the past two years, they have been widely applied to printing thin stems and small-face patterns. However, the effects of dye printing on large-area printing are still not achieved. The paint printing process is simple, the process flow is short, and the energy saving during the period is significant. Therefore, in the future, the research and application of paint printing technology on real silk will remain a hot topic and subject.
Four, four color printing technology Now the printing process is a special color printing, printing a color will be a flower board, with a color paste, plate making, color matching time, material consumption, but also need a huge multi-color printing machine. The development of CAD and the improvement of printing and dyeing technology have provided the basis for research and development of four-color printing of real silk. In recent years, the four-color printing of individual patterns or patterns has been successful, but there are still difficulties in continuous printing. Pick up the issue. There are still many problems in computer image processing, color tone control, color inaccuracy, and so on, and further exploration and solution are needed. It is expected that the four-color printing technology will become more mature.
Fifth, digital printing technology This is a computer by the printing design information to a group of dye nozzle design, control of the dye nozzle opening and closing to complete the fabric printing process of the latest technology. Not only the computer design patterns, but also the use of digital cameras to capture natural scenery or flowers, on the computer to be modified, modified into a desired pattern, and then control the dye nozzles on the fabric inkjet printing. This kind of technology is suitable for proofing, small quantities, and many varieties. The conversion speed is very fast and rapid delivery can be achieved. The defect is that the production speed is very slow, scanning and printing need to be carried out line by line, the output can not compete with the existing automatic printing machine; special dye is needed; the printed fabric needs special pretreatment, otherwise the pattern will be infiltrated and blurred. In the 21st century, digital printing technology is certainly the latest and most promising printing technology.
In addition, technologies that can be developed for silk printing and dyeing include: elastic and wrinkle-resisting technology that can maintain the original silk style; finishing technology that can improve color fastness and anti-aging; and “green†printing and dyeing technology that does not use surfactants and synthetic dyes; Technology for color measurement and color matching in printed products; plasma treatment of fabric surfaces without water and chemicals to improve the dyeing and comfort of fabrics; and liquid carbon dioxide dyeing technology.
First, the cold-rolling reactor silk refining technology cold-rolled reactor technology in cotton printing and dyeing with reactive dyeing and cotton desizing in the success of the cold-rolled reactor water-saving energy-saving advantages are very significant, generally welcomed by printing and dyeing enterprises, and are widely used . Some people in the country have been studying the process of this technology transplanted silk degumming refining process up. If this technology is applied to the silk production process, not only will it save a lot of water and steam, but it will also greatly reduce the damage caused by the traditional refining equipment to silk, such as ash damage, hanging prints, and creases. Environmental protection and improving product quality will be of great benefit. Tests have shown that in a temperature of 35°C, thin, low weft density satin can be degummed in 24 hours (traditional process requires high temperatures of 96-98°C under micro-brain conditions to complete the refining, which takes 5-10 hours). It takes 96 hours for the thick and high density silks to reach a degumming rate of about 23%. From the results of practice, the application of cold pad technology is not only long in time, but also the whiteness is not enough. It seems that we must really realize the industrialization of cold pad piling technology on silk products. The key is to research and develop more than the current degumming glue. More efficient refining agents or refining enzymes, and the time to fall within 24 hours, to achieve this, the cold-rolled pile of silk has industrial value.
Second, spray dyeing technology has developed a foreign air atomization dyeing technology, this technology is in the dyeing process, the dye additives and gas flow through the high-temperature atomization device, directly after the atomized dye in gaseous form Spray on the fabric. The operation of the fabric is completely dependent on the circulation of the air flow, which smoothes the running fabric. When the atomized dye comes into contact with the fabric, the dye expands on the surface of the fabric and permeates into the interior of the fiber due to the constant condensation, and the process is repeated until the dyeing is completed. Compared with conventional dyeing, this technology has the following advantages: (1) The bath ratio is as small as 5-10 instead of the conventional 1:30-50; (2) shortens the dyeing time by 40%-50%; (3) the fabric runs without Tension; (4) Energy-saving and wastewater treatment costs; (5) Avoid the occurrence of disease in conventional dyeing machines and improve dyeing quality; (6) Due to the tension-free operation, fabrics have a special softness and drape. This technology operates at 15-30 M/min instead of 150-70 M/min. There are some companies in the country that are embarking on improvements in equipment and processes. In general, it is advisable to use spray dyeing techniques to achieve a leveling effect on the face.
Third, paint printing technology Cotton, polyester cotton fabrics using paint printing in the global share of printing has accounted for about 50%, paint printing fixed mainly rely on adhesives and cross-linking agent reaction to form a macromolecular film layer, the paint adheres to the fiber On the surface, the drawback of this type of printing is that the fabric feels hardened. The key technology of silk coating printing is that it has not yet found a good adhesive. It is necessary to make the coating firmly adhere to the surface of the real silk, and the color fastness is up to the national standard, while ensuring that the softness of the real silk is not affected. At present, the adhesives used in the market are mainly polypropylene and polyurethane. In the past two years, they have been widely applied to printing thin stems and small-face patterns. However, the effects of dye printing on large-area printing are still not achieved. The paint printing process is simple, the process flow is short, and the energy saving during the period is significant. Therefore, in the future, the research and application of paint printing technology on real silk will remain a hot topic and subject.
Four, four color printing technology Now the printing process is a special color printing, printing a color will be a flower board, with a color paste, plate making, color matching time, material consumption, but also need a huge multi-color printing machine. The development of CAD and the improvement of printing and dyeing technology have provided the basis for research and development of four-color printing of real silk. In recent years, the four-color printing of individual patterns or patterns has been successful, but there are still difficulties in continuous printing. Pick up the issue. There are still many problems in computer image processing, color tone control, color inaccuracy, and so on, and further exploration and solution are needed. It is expected that the four-color printing technology will become more mature.
Fifth, digital printing technology This is a computer by the printing design information to a group of dye nozzle design, control of the dye nozzle opening and closing to complete the fabric printing process of the latest technology. Not only the computer design patterns, but also the use of digital cameras to capture natural scenery or flowers, on the computer to be modified, modified into a desired pattern, and then control the dye nozzles on the fabric inkjet printing. This kind of technology is suitable for proofing, small quantities, and many varieties. The conversion speed is very fast and rapid delivery can be achieved. The defect is that the production speed is very slow, scanning and printing need to be carried out line by line, the output can not compete with the existing automatic printing machine; special dye is needed; the printed fabric needs special pretreatment, otherwise the pattern will be infiltrated and blurred. In the 21st century, digital printing technology is certainly the latest and most promising printing technology.
In addition, technologies that can be developed for silk printing and dyeing include: elastic and wrinkle-resisting technology that can maintain the original silk style; finishing technology that can improve color fastness and anti-aging; and “green†printing and dyeing technology that does not use surfactants and synthetic dyes; Technology for color measurement and color matching in printed products; plasma treatment of fabric surfaces without water and chemicals to improve the dyeing and comfort of fabrics; and liquid carbon dioxide dyeing technology.
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