Raw-cotton fiber dyeing and finishing auxiliary for processing of colored spun yarns and application of auxiliary

Abstract

The invention discloses a raw-cotton fiber dyeing and finishing auxiliary for processing of colored spun yarns and application of the auxiliary. A pretreatment auxiliary is compounded from the following components in percentage by mass: 0.1%-5% of dioctadecyl methyl benzyl ammonium chloride, 0.05%-2% of dioctadecyl dimethyl ammonium chloride, 5%-20% of dodecyl dimethyl benzyl ammonium chloride, 10%-20% of fatty alcohol-polyoxyethylene ether, 5%-20% of alkyl sodium sulfonate, 5%-20% of alkyl sodium sulfate and 13%-74.85% of water; an after-finishing auxiliary is compounded from the following components in percentage by mass: 5%-20% of a cationic softening agent, 5%-20% of an organic silicon softening agent, 0.1%-5% of dioctadecyl methyl benzyl ammonium chloride, 0.05%-2% of dioctadecyl dimethyl ammonium chloride, 5%-20% of dodecyl dimethyl benzyl ammonium chloride and 33%-84.85% of water. The invention also relates to a method for dyeing and finishing raw cotton by utilizing the auxiliary; by adoption of the method, the problem of poor spinnability of fibers obtained by processing the raw cotton in a traditional method is solved.

Description

technical field [0001] The invention belongs to the technical field of textile fiber dyeing and finishing auxiliaries, and relates to raw cotton fiber dyeing and finishing auxiliaries and post-finishing auxiliaries used in color spinning processing. A method for pre-dyeing and finishing of raw cotton fibers. Background technique [0002] Color spun yarn generally refers to the yarn spun by mixing two or more loose fibers of different colors through a specific process, and has a specific appearance and color style. In the process of color spinning, the processing mode of "dyeing first, then spinning" is adopted, which changes the traditional production method of "spinning first, then dyeing". The color-spun yarn has the advantages of high added value and clean production. At the same time, the fabric composed of the color-spun yarn has a three-dimensional mixed color style, and the color is natural and subtle, with a strong hazy feeling. [0003] The common color-spun cotto...

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Problems solved by technology

[0006] (1) The efficiency of carding and spinning is low: it is mainly manifested in the poor web formation during the combing process, and the fiber winding cot phenomenon occurs during the combing and final drawing process, which can cause multiple shutdowns during the production process, resulting in high production efficiency. low, even unprocessable

[0007] (2) Poor product quality: In the process of combing and final drawing, there are serious flowers, and the colored cotton fibers are seriously entangled with each other, resulting in difficulty in fiber drafting during spinning, resulting in the formation of color spots in the yarn, which leads to the formation of yarn quality problem

[0008] (3) Large fiber loss: Due to the frequent shutdowns, severe wear of the traveler and severe yarn breakage during the carding and spinning process, the fiber loss is large, and the feeding coefficient is often as high as 1.45.

[0009] (4) The variety of products is single: due to the poor carding and spinning performance of raw cotton fibers after pretreatment and dyeing, enterprises generally can only mix it with a high proportion of raw cotton for carding processing, and it is difficult to produce high value-added, completely previous cotton fibers. So-called solid-colored yarns and high-count yarns composed of treated and dyed loose cotton

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