Setting time is another main process condition for heat setting. After the fabric enters the heating zone, the time required for heating and setting can be roughly divided into the following parts: After the fabric enters the heating zone, the time required to heat the surface of the fabric to the setting temperature, or heating time. After the fabric surface reaches the setting temperature, the fibers in the inner and outer parts of the fabric have the same heat penetration time required for the setting temperature. After the fabric reaches the setting temperature, the time required for the molecules in the fiber to adjust according to the setting conditions , or molecular adjustment time. The time required for the fabric to leave the drying room to fix the size of the fabric for cooling, or called cooling time. The setting time usually refers to the time required for the first three items, not including the fourth item. If the first item is regarded as a kind of preheating effect, then the setting time only refers to the time required for the second and third items, that is, the time required for thermal penetration and molecular adjustment. The time required for heating and heat penetration depends on the performance of the heat source, the weight per unit area of ??the fabric, the thermal conductivity of the fiber and the moisture content of the fabric.
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