The relationship between moisture regain, moisture content, yarn quality and spinning technology. Composite fabric information

Moisture regain not only affects the actual weight of raw cotton and the performance of cotton fibers, but also affects the production process and finished product quality. The moisture regain of raw cotton is too high, which makes it easy to rot and deteriorate during storage. It is easy to get kinked during spinning processes such as cotton cleaning and carding, which increases defects and has low impurity removal efficiency. The moisture content of raw cotton is too low, and the fiber strength is low. It is easily broken into short fibers by machinery, which increases fly waste in the workshop and reduces the strength of the yarn. The factors that affect the moisture content of raw cotton, in addition to the temperature and humidity of the surrounding air, are mainly the maturity of the raw cotton. High maturity and low moisture; low maturity and high moisture. Low-grade cotton has poor maturity and generally has high moisture content. The moisture content of raw cotton in my country is generally 7% to 11%. The moisture content of cotton in southern cotton areas is higher, while the moisture content of cotton in northern cotton areas is lower. Generally, it is more appropriate to control the moisture content of raw cotton in the range of 7% to 9%. The official moisture regain rate of cotton is 8.5%; the maximum moisture regain rate of cotton is 10.5%.
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