Introduction
Fiber cracking phenomena, also called “flower silk”, has been observed in many yarn spinning processes. This phenomenon is characterized by the formation of loops on the surface of the fibers and the formation of delicate fibers which resemble flower silk in appearance. The presence of flower silk has a major detrimental effect on the quality of the yarn and the properties of the final fabric. To prevent this phenomenon, it is important to thoroughly understand the contributing factors and to take preventative measures.
Cause of flower silk
The primary contributing factor to flower silk is improper twist. Twists of yarns are classified into two kinds: balanced and unbalanced. Balanced twist is achieved by twisting the yarn to the left and then to the right. This allows the yarn to lay flat and become less likely to form loops on the surface of the fibers. Unbalanced twist occurs when the yarn is twisted inconsistently, giving it a random and irregular twist. This creates an unevenness in the yarn which can lead to the formation of loops on the surface of the fibers, leading to the formation of flower silk.
Other factors which can contribute to flower silk include improper draw ratio, unevenness in the spinning process, and the spindle speed. Uneven draw ratio can lead to irregular yarn formation and the subsequent formation of flower silk. Uneven spinning process causes tension to be applied unevenly on the yarn and results in increasing the potential for flower silk. Incorrect spindle speed also contributes to the formation of flower silk, as the twisting and drawing forces are not uniform.
Preventive measures
In order to prevent the formation of flower silk, there are a few different measures which can be taken.
Firstly, adequate twist must be maintained during spinning. The twist should be balanced and consistent, with the same number of twists in both directions. This ensures that there is no looping on the surface of the yarn.
Secondly, the draw ratio should be kept consistent and stable. If it is not, the formation of flower silk is more likely.
Thirdly, the spindle speed should be monitored and fine-tuned to the proper speed for the production process.
Finally, regular maintenance and cleaning of equipment is necessary to ensure that the spinning process remains consistent.
Conclusion
Flower silk is a serious problem which has a detrimental effect on the quality of the yarn and fabric. To prevent the formation of flower silk, it is important to maintain adequate twist, a consistent draw ratio, and correct spindle speed. Regular maintenance and cleaning of the equipment can also help to reduce the occurrence of flower silk. By following these measures, the production of high quality yarns can be achieved.
