The singeing process is a very important step in the fabric pre-treatment process. Under normal circumstances, fabrics need to go through the singeing process during pre-treatment, but not all products must go through the singeing process. For example, in order to reduce production costs, sanded fabrics generally do not need to be singed; in order to prevent polyester and elastic yarn from being unable to withstand high temperatures, the singeing process must be adjusted according to product requirements, using high temperature and rapid singeing, without singeing the reverse side, or There is no singeing or other processes on the front and back.
During the production process, it is often necessary to judge from the fabric whether it has gone through the singeing process during the production process due to quality problems, so as to find out the real cause of the quality problem. .
★ Judging from the surface finish: the fabric surface after singeing has a better surface finish, almost no long hair, a significant reduction in short hair, and fewer neps on the cloth surface. The color is full and even. When looking at the fabric that has not been singed, you can see that there are a small amount of long fibers above 5mm, and there are more short fibers around 2mm. There are more neps on the cloth surface, and the color of the fabric is obviously uneven, which can be seen on the cloth surface. The difference between shades.
★Judging from the neatness of the fabric edges: there will be obvious length differences in the remaining weft yarns on the edges of the singeed fabrics. The size of this difference is related to the singeing process. It has a lot to do with it; fabrics that have not been processed by singeing process will have neat and uniform edge hairiness, and there will be no obvious difference in length and unevenness.
★ Judging from the traces left after fiber burning: Fabrics with chemical fibers in the weft direction can be judged by analyzing the shape of the fabric edge weft to determine whether it has been singed. deal with. Since there is a melting process for chemical fibers, traces of chemical fiber melting will be seen in the weft yarn residue of the fabric edge tissue after singeing. Under normal circumstances, it can be observed with the naked eye. It feels spherical and tingling when touched. Traces of melting can be clearly seen under a microscope. </p
