The three elements of Stenter's ( https://www.hotairstenter.com/product/hot-air-stenter.html ) craftsmanship

1. Temperature

Temperature is the main factor affecting the quality of heat setting.

After the fabric is heat-set, the degree to which the original wrinkles 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.


Second, time

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:

Heating time: After the fabric enters the heating zone, the time required to heat the fabric surface to the setting temperature.

Heat penetration 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.

Molecule adjustment time: After the fabric reaches the setting temperature, the time required for the molecules in the fiber to adjust according to the setting conditions.

Cooling time: The time it takes for the fabric to leave the drying room to fix the size of the fabric for cooling.

The setting time usually refers to the time required for the first three items, excluding the fourth item. If one 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. Blending opener

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.

Three, tension

The tension that the fabric receives during the heat setting process has a certain effect on the quality of the setting, including the dimensional thermal stability, strength and elongation at break of the fabric.

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.

The average single yarn strength of the finalized fabric is slightly higher than that of the unshaped one, and the change in the weft direction is more obvious than that in the warp direction.

After the Flat Screen Printer ( https://www.hotairstenter.com/product/flat-screen-printing-machine.html ) is set, the elongation at break of the fabric is reduced in the weft direction with the increase in the degree of extension, while the warp direction becomes larger with the increase in overfeeding.