Production method of pure hemp mercerized yarn

Abstract

The invention provides a production method of pure hemp mercerized yarn. By the production method, the mercerized pure hemp yarn has few broken ends, excellent brute force and brightness, the deep dyeing property, level-dyeing property and penetrating property are greatly improved, the handle and smoothness are improved, the difficulty in later processes of dyeing, weaving and after finishing is reduced, and the application performance of the pure hemp yarn is integrally improved. The production method comprises the processes of singeing, reeling, mercerizing, dyeing, squeezing water, drying and rewinding, and is characterized in that the mercerizing process is as follows: yarn is put into a yarn mercerizing machine, wherein the alkalinity of treating fluid is 28-30 baume degrees, the temperature of the treating fluid is 18-22 DEG C, the applied tensile force stretching is 1-3%, the alkali dipping time is 1-3 minutes, the alkali squeezing time is 30 seconds-1 minute, time for washing with hot water is 30-60 seconds at the water temperature of 60-70 DEG C, time for washing with cold water is 30-45 seconds, and the treating time is 5 minutes-5 minutes and 50 seconds.

Description

technical field [0001] The invention relates to the technical field of production methods of hemp mercerized yarns, in particular to a production method of pure hemp mercerized yarns. Background technique [0002] Hemp fiber is a pure natural green textile raw material and one of the earliest textile raw materials used by humans. Hemp fiber itself has antibacterial and antibacterial properties, moisture absorption and perspiration, high temperature resistance, wave absorption and super absorption properties. Hemp yarn is usually used in knitted T-shirts, towels, socks and home textiles. It is a rare textile material that combines natural green and functional environmental protection. [0003] However, due to the special cross-sectional structure of hemp yarn, it has a large degree of crystallinity, orientation and dense amorphous area, resulting in a decrease in spinning cohesion, a decrease in the depth of dyeing, and an increase in the cost of weaving and finishing. At th...

AI Technical Summary

Problems solved by technology

[0005] Hemp fiber is shorter and thinner than cotton, with a length of only 18-26mm, and its bending stiffness is more than twice that of cotton, reaching 5.03×10 -4 cN cm 2 , resulting in low cohesion of the hemp fiber yarn after spinning, and the yarn elongation at break is very poor, generally less than 2%. Excessive stretching and excessive alkali soaking cannot be carried out, otherwise the broken ends will be serious and cannot For actual production, that is, if the conventional mercerized cotton production process is used for production, the pure hemp yarn will have 200-400 broken ends per kilogram, which is serious and cannot be mass-produced