The setting time of the Stenter Machine Heat setting 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:
1. Heating time: After the fabric enters the heating zone, the time required to heat the surface of the fabric to the setting temperature.
2. Heat penetration time: After the surface of the fabric reaches the setting temperature, the heat penetration time required to make the fibers inside and outside the fabric have the same setting temperature.
3. Molecular adjustment time: After the fabric reaches the setting temperature, the molecules in the fiber are adjusted according to the setting conditions.
4. Cooling time: The time required for the fabric to be cooled after the fabric leaves the drying room and the size of the fabric is fixed.
The setting time usually referred to by the stenter setting machine usually refers to the time required for the first three items, excluding the fourth item to a certain extent. If one item is regarded as a 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 of the fabric unit area, the thermal conductivity of the fiber and the moisture content of the fabric.
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