As we all know, increasing the speed of spinning frame can effectively reduce the production cost of tons of yarn and improve the economic benefits of enterprises. However, when the speed of the spinning frame increases, the breakage rate increases significantly, resulting in production difficulties, because of the lack of yarn strength.
So what are the reasons why yarn strength is not high?
1 Short detail strong weak ring
Due to the small number of fiber roots in the short detail section of the yarn, the tension can withstand is small, which is easy to cause yarn breakage, thus forming a strong weak ring.
2 long detail strong weak ring
When there are long details on the yarn, because the production conditions such as the weight of the wire ring and the spindle speed do not change, the twist at the long details of the yarn in the production process is the same as that of the normal yarn, resulting in the actual twist coefficient at the details becoming smaller and the holding force between the fibers is reduced; As the mass per unit length of the yarn becomes smaller, the centrifugal force coefficient of the yarn also becomes smaller, the air ring becomes thin, the attitude of the wire ring on the steel collar changes, and the running stability becomes worse, when the strength of the yarn can not withstand the tension fluctuation, the yarn is broken and the yarn is formed.
3 Strong and weak ring at the junction of coarse details
If there are thick details on the yarn, because the yarn twist has a tendency to concentrate on the details, then the twist at the details is more, the fiber at the thick section has less twist, and at the junction of the thick details, on the one hand, the twist is less, on the other hand, the fiber is relatively less, the holding force between the fibers is poor, the yarn is easy to break from here, and a strong weak ring is formed.
4 Weak twist point strong weak ring
Sometimes the weak twist point is formed on the yarn due to the spindle running and other reasons, and the holding force between the fibers on the weak twist point is small, and the strength is low, and the yarn is easy to break from this place, thus forming a strong weak ring.
5 Strong and weak ring of hybrid coating points
If there is a tangle in the yarn, the fiber structure at this tangle covering point is destroyed, which often causes the number of fiber roots here, the fiber elongation parallelism is poor, the twist Angle is inconsistent and so on, so that this point can withstand less breaking work; In addition, because the diameter of the yarn at this tangle coating point is generally large, the yarn is often blocked when passing through the wire loop yarn channel, resulting in an instant peak of winding tension, which causes the yarn to break and forms a strong weak ring.
There are many factors affecting the strength and weak ring of fine yarn, so we should seek the most fundamental cause of the strength and weak ring of fine yarn, and eliminate the factors forming the strength and weak ring of fine yarn from the source, in order to effectively reduce the breakage of fine yarn
