The relationship between relative humidity and chargeability The friction between the mechanical surface and the fibers or the mutual friction between the fibers will inevitably cause the fibers to become charged. When the fibers and the body have different charges, they will prevent the fibers from stretching, combing, and interweaving. The winding process goes smoothly.
When the fibers have different charges, the fibers will not clasp together, and the hairiness will be clustered. This will cause warp yarns to grow, resulting in weaving breaks and picking up more flowers. This will make the fabric cloth rough and form a disperse shape and increase the relative humidity of the air. Reduce the specific resistance of the fiber to increase the rate of charge dissipation and thus eliminate static electricity.
The effect of relative humidity on the spinning process is that the relative humidity is too low, the yarn strength is reduced, and the yarn breakage increases.
Relative humidity is too low and the electrostatic effect increases.
If the relative humidity is too low, the yarn stems deteriorate and the hairiness increases.
Relative humidity is too low and fly flowers increase.
Relative humidity is too low and processing capacity becomes lower.
Relationship between relative humidity and moisture regain The relative humidity of air is different, and the moisture regain of the fiber is also different. As the relative humidity of the air increases, the moisture regain of the fiber increases, but it decreases.
The relationship between relative humidity and strength Relative humidity has a great influence on the strength of fibers, and it can increase and improve the degree of alignment of long-chain molecules and increase the strength. For cotton fiber, its relative strength is 60-70%. The dry state can be increased by about 50%.
Relationship between Relative Humidity and Elongation The fiber after absorption has an increased distance between molecules, and the relative displacement easily occurs due to the external force. Therefore, the elongation of the fiber increases with the increase in relative humidity. Among them, wool, silk, and viscose fibers absorb moisture more easily than natural fibers such as cotton and hemp. As for synthetic fibers (such as polyester), hygroscopicity is poor, so relative humidity has little effect on elongation.
Relationship between relative humidity and flexibility When the relative humidity increases, the distance between molecules after moisture absorption of the fiber increases, so that the hardness and brittleness of the fiber are reduced, and the flexibility of the fiber is greatly improved.