Polyester Dyeing in Supercritical Carbon Dioxide

2010-02-18  来源:本站原创  分类:Industry  人气:177 

Keywords: polyester fiber polyester fiber dyeing with carbon dioxide as the medium, although the carbon dioxide molecules and the polyester molecules will form hydrogen bonds, but because of its molecules are small, easy access to fiber structured regional produce plasticization and lower fiber glass transition temperature, increase the fiber chain activities and free diffusion volume, so in the case of low temperature to achieve staining. Supercritical carbon dioxide dyeing system, low viscosity, the interactions among the small, and therefore the spread of resistance by the dye, diffusion speed, dye transfer easily from the solution to the fiber, and quickly spread to the internal fiber. In the commercial, practical, people most concerned about the cost of production equipment costs. Although the initial investment is higher but the German company to 1000 L ADO dyed polyester industrial scale estimates, the cost of water was found with a considerable, especially when the cost advantage of greater scale increase. With increasingly stringent environmental requirements, development of non-aqueous dye will be more taken seriously, supercritical fluid dyeing, although the hope that it will fully replace the water as a dyeing medium is unrealistic, but in some special staining system is expected to apply. In addition, some new non-aqueous dyeing medium will be developed. Such as the ionic liquid may also be developed as a non-aqueous dyeing medium, because it no vapor pressure, at atmospheric pressure dyeing, dyeing equipment is simple, and by adjusting the ionic liquid hydrophobic component, can be dyed as many types of media. A test to prove not only the direct, acid, reactive plasma has a good solubility and dye the dye uptake and dispersion of non-ionic dye has good dye uptake, it is a good dyeing medium. This carried over: http://database.texnet.com.cn/db-technology/detail--1477.html

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