In the process of using hot air stenter, the quality of the fabric can be further improved through soft processing to meet the requirements of customers. In addition, it may not scratch easily on the cloth guide wheel. In addition, the use of setting machine equipment can also help to keep the fabric surface smooth and dimensional stability, and can also eliminate wrinkles and creases formed during dyeing and finishing. It should be noted that in order to obtain this desired effect, it is necessary to reasonably formulate appropriate shaping process conditions during the operation of the hot air stenter.
1. First of all, the solidification temperature is usually determined according to the elastic shrinkage rate and thickness of the fabric. If the set temperature is too high, the strength will decrease, the elasticity will decrease, and the fabric may change color. On the contrary, if the temperature is too low, it will cause the fabric to curl, unstable width, and large shrinkage.
2. Reasonably control the speed of the setting machine. Under normal circumstances, its operating speed mainly depends on the length of the forming zone and the level of forming temperature. If the speed is too fast, it will affect the plastic effect, and may also result in the inability to remove fine wrinkles in the dyeing and finishing process. Conversely, if the vehicle speed is slow and the temperature is high, it may cause the fabric to turn yellow and reduce elasticity.
In addition to the above two conditions, another process parameter that needs to be reasonably controlled is the excessive supply of hot air stenter equipment. Usually, after determining the width of the fabric, it is necessary to set an appropriate amount of overfeeding and tension. It should be noted that during the operation of the setting machine, the choice of this parameter will affect the weight, elasticity, and wrinkles of the fabric. For example, if the fabric tension is small, the overfeed is large and the cloth surface is uneven, it is difficult to eliminate the fine wrinkles generated during the dyeing process. Conversely, during the heat setting process, higher tension and smaller overfeed can cause curling.