Causes of yarn irregularity and its effect:
The most common faults of yarn are unevenness of the number or count of the yarn, inequality of twist, low strength or energy inequality, thinness in any part of the yarn, slab, knaps, etc. The reasons why irregularity is seen in the yarn are discussed below:
1. Properties of raw materials.
2. Internal weaknesses of the equipment used.
3. Mechanically defective equipment.
4. Other factors.
Table of Contents
1. Properties of raw material:
Fiber is used as raw material for making yarn. Based on the different qualities of this fiber, different machinery parts are installed, and gazing is done. But there are many differences in the different properties of the same lot of fibers such as length, fineness, maturity, crimp, etc. which is an obstacle in making a balanced yarn, resulting in yarn irregularity. https://bdfabric.com/yarn-evenness-irregularity-and-imperfection/
2. Causes of yarn irregularity and its effect-Internal weaknesses of the equipment used:
In the case of spinning, the fibers cannot be properly controlled by man or machine at every level. So in this case the speed of the fiber cannot be controlled properly through the machines, but the speed of the fiber inside the machine is controlled in different ways. This means that the fibers sometimes move forward due to the push of wind, sometimes due to the push of the surrounding fibers, they stay together due to friction or twisting, etc. On the other hand, due to differences in fiber properties, different roller aprons, gills, etc. cannot function properly due to differences in fiber properties. As seen in the case of the drafting wave. Therefore, it can be said that due to the difference in the various required qualities of the fiber, the equipment used cannot give full functionality even though it is accurate in all respects, resulting in irregularities. https://bdfabric.com/role-of-yarn-on-fabrics-properties/
3. Causes of yarn irregularity and its effect-Mechanically defective equipment:
A good machine cannot produce a balanced yarn even if it is accurate from all sides. Therefore, it can be said without hesitation that mechanically defective equipment will further increase this irregularity.
4. Other Factors:
In addition to the factors mentioned above, the workers, employees, management, etc. of a factory make a special contribution to the betterment of the product. Incompetent management, lack of proper technical knowledge, negligence in duty, incompetence, etc. also increase the irregularity of the product. In addition, temperature, humidity, etc. also affect the irregularity of the product.
Effect of irregularity:
The effect of yarn irregularity is not understood in many cases before the fabric or other processing by the yarn. However, the effect of this irregularity on the dyeing or finishing process after fabrication by yarn is discussed below:
1. Fabric appearance:
Fabrics made with irregular yarn do not look good, which is also noticeable in the finishing process. This results in a Diamond bar and Weft bar or Block bar defects in the fabric.
Whether it is sliver, roving, or yarn, the strength of its smooth space is weak due to irregularity.
3. Striped fabric:
If the yarn is irregular, especially if the yarn number or count is irregular, then the defect is caught in the layers of the fabric woven by the yarn.
4. Dyeing and printing faults:
Due to the irregularity of the yarn, its soft and thick areas take on more dye than the soft and thin areas, which creates an uneven shade of color. On the other hand, uneven removal of starch during desizing affects the subsequent process.