A kind of boiling and bleaching process for pure linen yarn

Abstract

The invention discloses a novel boiling and bleaching process for pure flax yarn, comprising the following steps: (1), roving, (2), pre-bleaching, (3), spun yarn, (4), final bleaching: the bobbin The yarn is set on the creel, put into the bleaching pot, and carried out in the following order: a, pickling; b, neutralization; c, initial bleaching; d, rebleaching; e, washing. The invention ensures that the final bleaching of the spun yarn is not only more uniform, but also strong, the yarn quality is good, the broken end rate is greatly reduced, and the obtained flax spun yarn has gaps between fibers, and the handle is softer. The present invention divides the problems in the traditional scouring and bleaching and spinning processes into roving pre-bleaching and spun yarn final bleaching, and divides the difficult problem of traditional roving scouring and bleaching into two steps, which realizes the controllability of the process and ensures the hemp fiber spun yarn Higher yarn quality.

Description

technical field [0001] The invention relates to the field of flax spinning, in particular to a boiling and bleaching process for pure flax yarn. Background technique [0002] As a pure natural fiber, flax has the remarkable characteristics of sweat absorption, good air permeability and harmlessness to human body, and has been paid more and more attention in the clothing and textile industries. The flax roving bleaching process is the core of the flax factory production process. In order to obtain spinnable flax fibers, it must go through degumming. The roving bleaching is to remove some pectin and lignin in the fibers and improve the splitting degree of the flax fibers. Guarantee the necessary slippage between the fibers during the drafting of the spun yarn, so as to improve the quality of the flax spun yarn. With the introduction of the concept of green textile, biological enzymes are gradually applied to the scouring of flax roving. Enzymatic scouring of flax roving has ...

AI Technical Summary

Problems solved by technology

However, the control of the scalding and bleaching process is the key to the quality of the final spun yarn, because after the flax yarn is spun into roving, if the scalding and bleaching process is too light, the removal of impurities will be incomplete and the amount of numbness will be large. , and hidden in the roving, if the degree of bleaching is heavy and the amount of pectin in the hemp fiber is seriously removed, it will directly affect the strength of the roving, which will lead to a decrease in the strength of the final spun yarn

Moreover, due to the uneven fiber thickness of the roving itself, it will become more uneven after being boiled and bleached, resulting in irreversible unevenness in the spun yarn, and frequent end breaks during spinning, which directly affects the feel of the final hemp fabric and powerful

The traditional roving bleaching process often takes 4-6 hours of processing time, and requires a large amount of water for pickling and neutralization. Not only does the process last for a long time, but also the consumption of chemicals and water is very large, the cost is high, and the production efficiency is restricted.

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