The process of Hot Air Stenter Machine should be judged based on three factors, namely temperature, time and tension.
When the fabric is heat-set by Hot Air Stenter 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 are 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 sizing, it must reach a certain temperature, which requires heating. Therefore, setting time is another important process condition for Hot Air Stenter Machine heat setting. 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 control of the quality of the Hot Air Stenter Machine heat setting process 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 Hot Air Stenter Machine heat setting process is mainly reflected in the performance, area, weight, thermal conductivity of the fiber, and the moisture content of the fabric, which are 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 Hot Air Stenter Machine heat setting process, the warp dimensional thermal stability increases with the increase of the warp overfeed during setting, while the weft dimensional thermal stability decreases with the increase of the door width. .
Therefore, the Flat Screen Printing Machine Factory controls the three factors of temperature, time and tension. When the Hot Air Stenter Machine is used for the shaping process, the quality of the process can basically be guaranteed.