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Leather Making Method Using Carbon Dioxide Supercritical Fluid As Medium

2014/7/23 7:48:00 18

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Carbon Dioxide Supercritical Leather Making Methods

> Description: the project provides a leather making method with < a href= "http://www.91se91.com/news/index_c.asp" > carbon dioxide < /a > supercritical fluid. The method involves using carbon dioxide supercritical fluid as a medium for leather degreasing, enzyme depilation, softening, tanning, dyeing and fatliquoring. 
 in the above operation, the entrainer is basically not used, and the temperature is reduced to 33 degrees centigrade in the process of carbon dioxide < a href= "http://www.91se91.com/news/index_c.asp" > supercritical fluid < /a >, and the pressure drops below 9.0MPa. 
 processing time is reduced to 60 minutes, hardly using water, so that the energy consumption of leather processing is much lower, and has huge economic, environmental and social benefits. 
 cooperation mode: < a href= "http://www.91se91.com/news/index_c.asp" > technology spanfer < /a > /p >
 unit name: National Engineering Laboratory of leather cleaning technology, Sichuan University, 
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 because compact spinning has special yarn forming mechanism and yarn structure, the quality of spinning equipment such as cots is raised. There are two kinds of cots in compact spinning, one is the drafting cots, the other is the gathering cots. The former is composed of a powerful forceps made of roller friction drive and rollers, which can effectively grip the whiskers and fibers, form an appropriate and stable grip force, and ensure normal draft operation; the latter as the key part of the output mechanism and the output roller or special-shaped tube constitute the output jaw, which has the output of compact fiber whiskers, which controls the fiber bar in the gathering area, and prevents the twisting area from twisting and uploading. 
 in order to meet the demand of intensive spinning of fine count yarn, especially for the demand of super fine yarn, we have organized and developed CF2.9tex long staple cotton super fine count cotton compact spinning. CF2.9tex yarn is super fine yarn. Its yarn diameter is small, the number of fiber roots is very small (about 20). The cohesion and cohesion of the fibers are low, the yarn strength is low, the yarn breakage is more, and the spinning process is more difficult. 
 especially in the spinning process, because the number of fiber roots in the unit area is very small, the yarn itself can not be loaded with external resistance and can not produce normally. In order to reduce the broken ends, we have taken some measures: we should use the WRC-963, WRC-365 and WRC-965 type non treatment cots to excavate the potential of spinning before ensuring the normal production and good quality of the semi-finished products. 
 WRC-365 cots are better than WRC-965 cots in terms of stability, consistency and long-term adaptability. The WRC-365 type surface non treatment cots have the characteristics of strong spinnability, good moisture absorption and moisture release, good surface cleanness and good resistance to winding. It is closer to the overall performance of the imported cots J-463 in the production of super fine yarn, and can meet the requirements of the production of CF2.9tex super fine yarn.