Views: 0 Author: Site Editor Publish Time: 2021-10-26 Origin: Site
When fabrics are heat-set using a stenter setting machine, the control of temperature will determine the quality of its qualitative quality. Because after heat setting, the degree of wrinkles on the original surface of the fabric is eliminated, the improvement of surface smoothness, the dimensional thermal stability of the fabric and other wearing properties are closely related to the height of the heat setting temperature.
Before shaping, it must reach a certain temperature, which requires heating. Therefore, the setting time is another important process condition for the heat setting of the stenter setting machine. After the fabric enters the heating zone, the time required for heating and setting can be roughly divided into the following parts: heating time, heat penetration time, molecular adjustment time and cooling time.
Under normal circumstances, the quality control of the heat setting process of the stenter setting machine mainly refers to the control of heating time, heat penetration time and molecular adjustment time, excluding cooling time. If the 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.
In general, the quality of the heat setting process of the stenter setting machine is mainly reflected in the performance, area, weight, thermal conductivity of the fiber, and the moisture content of the fabric when setting the fabric, which is required for heating and heat penetration. Time control.
Because the tension on the surface of the fabric will change under certain conditions, it will cause the dimensional thermal stability, strength and elongation at break of the fabric to be affected to a certain extent. Especially in the heat setting process of the stenter setting machine, the thermal stability of the warp direction increases with the increase of the warp overfeed during setting, while the thermal stability of the weft direction decreases with the increase of the degree of stretching of the door width. .
Therefore, by controlling the three factors of temperature, time and tension, the quality of the process can basically be guaranteed when the stenter setting machine is used for the setting process.