How to spin semi-worsted yarn

Update: 22-04-2020

How to control the quality semi-worsted yarn of the yar […]

How to control the quality semi-worsted yarn of the yarn while expanding the production capacity, so that the quality varieties of semi-worsted yarn can meet the requirements of users for the continuous improvement of yarn quality, which is also a key point of discussion and exchange in this seminar, according to the participating companies The focus of the experience introduction should be the following:


Semi-worsted stock


1. The raw materials are widely used but pay attention to reasonable matching. The process of semi-worsted spinning determines that the fiber length of the raw material used is short fiber, so the natural length of most animal hair fibers is within this range. Longer fibers such as wool tops, silk strips, and hemp strips need to be cut before use. The cutting length must be mastered by two principles: one is to not add short velvet, and the other is to cut super long fibers, otherwise it will affect the yarn. Dry and anti-pilling indicators, and will produce spun yarn and other phenomena. For chemical fibers, as long as short fibers and medium-length fibers can be used as raw materials for semi-worsted spinning.


2. Pay attention to the dyeing and wool processing of raw materials.
①Dyeing: Semi-worsted yarn is usually blended with more than two different raw materials. If yarn dyeing and grey cloth dyeing are used, the homochromaticity of different fibers is not easy to control, and it is difficult to ensure the quality of dyeing. Generally, loose fiber dyeing is used, that is, fibers with different properties are dyed, rinsed, and dried and then wool. In order to ensure the uniformity of the wool, the treatment process after dyeing is very important. Wash the surface float and dyeing additives, and keep the fibers fluffy and non-sticky after drying.


②Wool: When weaving hair, an appropriate amount of oil and water and antistatic agent should be added to smooth the surface of the fiber to reduce friction damage during carding. The amount of oil and water should be adjusted according to the fiber. In order to make the raw materials of various proportions to be mixed evenly, the wool generally needs two times or even more. The reconciled raw materials should be stored in the hair silo for 24 hours, so that the hair oil and antistatic agent can be fully penetrated and absorbed to achieve a balanced required moisture regain, creating conditions for the next combing. It is necessary to strictly follow the requirements of the wool, such as the "horizontal spread straight" method, to reduce yarn defects such as uneven mixing caused by uneven hair. Harmony is a very important link, and the raw materials after the hair should have a better opening state, so it is important to pre-open the raw materials before the hair.