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. The tension of the fabric during the heat setting process has a certain influence on the quality of the setting, including the dimensional thermal stability, strength and elongation at break of the fabric.
The thermal stability of warp direction increased with the increase of overfeed in warp direction, while the thermal stability of weft direction decreased with the increase of web stretch. The average single yarn strength of the fabric after setting is slightly higher than that of unshaped fabric, and the change in weft direction is more obvious than that in warp direction. The elongation at break of the fabric after setting, the weft direction decreases with the increase of the stretch degree, while the warp direction increases with the increase of overfeed.
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