In fact, the main process of stretching and setting machine can be divided into two processes: first, the main process of stretching and setting machine, the so-called stretching process, in fact, mainly refers to the application of a certain tension on the weft direction of the fabric, so as to remove the uneven edges and weft yarns caused by the force in the pretreatment and dyeing process. Defects such as inclination, width and so on. That is to say, the surface quality of the fabrics will be improved obviously after the treatment. -
Secondly, the setting process, specifically speaking, is to set a suitable tension for the stretching and setting machine, and then to deal with the fabric. Firstly, it is heated to a certain temperature, and then kept for a certain time. In this way, the molecular chains of fibers will be readjusted in new positions. The fabric is then cooled at an appropriate rate to stabilize the state of heat change.
Generally speaking, the wrinkles on the fabric can be removed and new wrinkles can be prevented after the setting treatment of the stretching and setting machine. That is to say, after treatment, the surface quality of the fabric can be obviously improved to make it look more beautiful. -
For some fabrics, it is often necessary to use stretching and setting machine equipment for pre-setting before dyeing and printing. The advantage of this method is that it can reduce the bad phenomena such as stretch marks. For example, in the treatment of stretcher cloth, because of its high content of spandex, the shrinkage of spandex is not equal to that of yarn, and the yarn is harder than other raw materials. If the stretching machine is not used for predesigning, the printing and dyeing process in the later stage is likely to produce marks and so on.
In addition, there are many finished products also need to be finalized by the stretching machine equipment. For example, for nylon germ cloth, in the process of this treatment, the setting temperature should be maintained between 160 and 180 C, and the setting speed should be controlled between 20 meters and 25 meters per minute.
At the same time, the setting temperature of the stretch setting machine must be reasonably controlled. This is because the setting temperature has a great influence on the color, especially purple, pink blue, etc., so we should pay attention to whether the color before and after treatment is the same. In addition, it should be noted that the shrinkage of nylon fabrics varies with the thickness of nylon fabrics. It's easy to crochet nylon fabric. If there is a crochet yarn at the end of the crochet yarn, stop the machine immediately, check the machine head and tail, bellows, drums, sandpaper grinding, or padding.
In addition, in the process of setting and finishing polyester fabric with stretching and setting machine equipment, the setting temperature is generally controlled between 170 and 200 C, and the setting speed is 20 to 28 meters per minute.
It should be noted that in the process of setting and finishing of polyester Bobby cloth, the setting temperature of the stretching and setting machine must be reasonably controlled. At the same time, the thickness of the middle edge of the cloth and the speed of the machine should be slowed down, usually in two pulls. This is because the thickness difference of the middle edge can be reduced by dividing it twice.
http://www.sunwinmachinery.com
