1, the choice of singeing equipment. The heat-resisting property of polyester determines that the singeing of polyester/cotton blended fabrics should be done with gas singeing, and copper stencils and cylinder singeing should not be used. Because the cloth body is in direct contact with the red hot metal surface, the cloth body easily warms up, causing a drop in the strength of the fiber, and it is also easy to melt the cilia, so that the fabric forms a darker, slower-like spot.
2, to take measures to reduce the body temperature. In the singeing of polyester-cotton blended fabrics, the ideal condition is to not only burn the cilia, but also reduce the cloth body temperature of the fabric, so as not to damage the fabric. At present, when the general gas is singed, the flame temperature is about 800 degrees, which satisfies the combustion temperature of the polyester. Therefore, the measure of reducing the temperature of the cloth body is one of the keys to the singeing of the polyester-cotton blended fabric. The long-term practice has proved that the fabric blowing cold air through the crater and on the crater, the fabric wrapping cold water singeing roller, is an effective measure to reduce the cloth body temperature.
On a four-flame horizontal gas singeing machine, one fume hood is installed for each two craters, and a four-row fan is installed between the second flaming port and the third crater, with 32 outlets and after the fourth crater Installed three rows of fans, 13 tuyere, blast volume of 15000m3/h, dedicated to blowing cold wind, can achieve good results. The observations made by using color crayons to draw lines and place of cloths at the cloth entrance indicate that if the hair is not blown, the temperature of the cloth body of the polyester/cotton fabrics continuously passing through the two craters has increased to 150-165 degrees; if the method of blowing cold air is used, The polyester-cotton fabrics were continuously singed through two positrons and two opposites at four craters. The cloth body temperature did not rise and remained at 150-165 degrees. Obviously, the singeing efficiency is improved.
3, to ensure the flammable gas combustion process is reasonable. The reasonable combustion of flammable gas does not only affect the energy saving problem, but also has a direct effect on improving the quality of singeing. The char caused by incomplete combustion will cause the fabric to be stained due to the electrostatic effect of polyester.
4, strictly control the process conditions. When the variety is changed, it is best to put the sample into production first. The singeing process conditions mainly refer to the singeing speed, the number of passes through the crater, and the flame strength.
5. Scraper should be equipped with static eliminator. Due to its low hygroscopicity, polyester is particularly prone to static electricity during friction and heat treatment. After the static electricity is generated, the singeing machine is difficult to put on the cloth, and there is a feeling of electric shock when the cloth is touched with the regulating box. The fabric is not easy to be neat and can easily be rolled onto a cloth rack.
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