Liquid ammonia modified method of cotton fibriia and yarn

Abstract

The invention provides a method for modifying cotton and long vegetable fiber or yarn by ammonia liquid, which comprises the following steps: firstly, drying pre-treatment of raw materials; secondly, ammonia leaching of the raw materials in a hermetical treatment tank; thirdly, spin-drying of the raw materials subjected to ammonia leaching when a creel is twirled; fourthly, drying of the raw materials subjected to spin-drying by ammonia flow when the creel rotates slowly; fifthly, flushing of the raw materials which are dried by the ammonia flow by airflow when the creel rotates slowly; and so on. The method keeps the inherent advantages of the cotton, the long vegetable fiber and the yarn, overcomes the defects of the cotton, the long vegetable fiber and the yarn, increases softness, crimp tendency and fluffiness of the cotton, the long vegetable fiber and the yarn, improves the dye-uptake rate, the leveling property and the showy dye level, and further solves the problems of energy conservation, efficiency improvement and environmental protection.

Description

technical field [0001] The invention relates to a method for processing textile raw materials, in particular to a method for modifying cotton and linen fibers and yarns with liquid ammonia. Background technique [0002] Existing cotton, hemp fiber and yarn are a large class of natural textile materials. Under the guidance of today's green, environmental protection and return to nature concepts, it has been paid more and more attention by the market and consumers. However, compared with synthetic fibers, cotton and hemp fibers and yarns are difficult to spin, weave, and dye poorly, and the textiles made of them have defects such as shrinkage and easy wrinkling. Liquid ammonia treatment is an important means to remove the disadvantages while retaining the inherent advantages of cotton and hemp fibers and yarns, making them fibers and yarns with special properties. However, in the existing methods, energy saving and environmental protection are not considered in key aspects. ...

AI Technical Summary

Problems solved by technology

However, in the existing methods, there is no focus on energy conservation and environmental protection.

Mainly reflected in: First, the measures for removing the liquid ammonia existing on the fiber after soaking ammonia are not perfect, so that energy is required to make the liquid ammonia do liquid-gas-liquid cycle recovery, the amount of energy required becomes larger, and the processing time becomes shorter. Long; the second is the current liquid ammonia recycling method, because the generated ammonia contains air, which must be absorbed by water to remove the air, and then the ammonia components are rectified from the ammonia water out, and then condensed into liquid ammonia, the process is long, consumes a lot of energy, and equipment investment is large; third, it is processed in an unsealed container, and the drying and deodorization of fibers and yarns is not thorough, polluting the environment; fourth, the production batch is small and cannot Meet the needs of mass production