Introduction and measurement of micronaire
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Micronaire is the transliteration of English Micronaire. The Micronaire value is a comprehensive indicator that reflects the fineness and maturity of cotton fiber. It is one of the important intrinsic quality indicators of cotton fiber and is closely related to the use value of cotton fiber. The micronaire value is divided into three levels: A, B, and C. Level B is the standard level. The value range of grade A is 3.7-4.2, which indicates good quality; the value range of grade B is 3.5-3.6 and 4.3-4.9; the value range of grade C is 3.4 and below and 5.0 and above, which indicates poor quality. The specific measurement method is to use an air flow meter to measure the moisture permeability of a constant amount of cotton fiber after being pressed into a fixed volume, and express it as a numerical value on this scale. The larger the value, the thicker the cotton fiber and the higher the maturity.
Micronaire value is closely related to yarn quality. Cotton fiber with a high micronaire value can withstand mechanical impact, is easy to remove impurities, has uniform yarn dryness, smooth appearance, few defects, and high yield of finished products. However, if the micronaire value is too high, it will affect the yarn strength. Cotton fibers with too low micronaire tend to have poor maturity, are prone to harmful defects, and have poor colorability. Therefore, only cotton with a moderate micronaire value can take into account both aspects and obtain more comprehensive economic benefits. AAANHJJGHSFW
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