Fabric setting can be divided into dry and wet fabric heat two kinds:
1.Dry heat setting:
Fabric in the heating chamber by the hot air heating, seal is pulled to a certain size,After the heating chamber cooling, so that the temperature dropped to the fiber glass transition temperature,To get a stable size, such as polyester and other fabrics, the temperature is generally 180 ~ 210 ℃, the time 20 ~ ~ 30 seconds.
2.Hot heat setting:
There are hot water bath and steamed two kinds,Hot water bath is the fabric in boiling water or high pressure tank treatment,While steaming the fabric is wound on a perforated roll steaming with steam,Nylon fabric commonly used hot and humid stereotypes, the temperature in the high pressure cylinder 125 ~ 135 ℃, processing 20 ~ ~ 30 minutes.
Heat-setting fabric size can be stabilized at a certain set level, while the pre-shaped process control tension, after the finished product washing, or mechanical drying,Styling pre-tensioned to eliminate, it will reply before the stereotypes size,The difference in the process of change, known as shrinkage, including straight and lateral changes.
Shrinkage has negative and positive values,The fabric area shrinkage, indicating the rate of change of the area of the fabric transverse and straight four points,Also equal to the sum of lateral and direct shrinkage minus its product,If the area shrinkage is less than 10%, the area shrinkage will approximate the sum of the shrinkage in the straight and horizontal directions.
Fabric shrinkage as raw materials,Fabric and processing methods are different, there are differences, and horizontal and vertical shrinkage rate to determine the resilience of the fabric is a bit difficult,Only to observe the fabric dyeing and finishing the size of each process change decision.To control the fabric shrink to a certain extent, the residual shrinkage in a certain degree of control,This process is an important part of processing.