Preparation method of dope-dyed cotton linter composite filament

A technology of dope dyeing and compound filament, applied in the direction of conjugated rayon, cellulose/protein conjugated rayon, wet spinning, etc. Low problems, to achieve excellent textile performance and wear performance, reduce environmental pressure, avoid dyeing and finishing wastewater effects

Active Publication Date: 2015-08-12
ZHEJIANG TEXTILE & FASHION COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional cotton fiber dyeing method is piece dyeing, that is, dyeing after spinning into cloth. The post-processing process is long, high energy consumption, poor color fastness, large amount of dyeing sewage discharge, and heavy environmental pressure

Method used

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  • Preparation method of dope-dyed cotton linter composite filament
  • Preparation method of dope-dyed cotton linter composite filament

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Embodiment Construction

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0014] Such as figure 1 Shown, the preparation method of the cotton linter composite filament dyed by this stock solution comprises the following steps:

[0015] 1) Preparation of dye stock solution: dissolving the reactive dye in water to prepare a dye stock solution with a reactive dye concentration of 20-40 wt%. The reactive dye can be selected from any one of the prior art according to the required color.

[0016] 2) preparation of spinning solution: the dyestuff stock solution is added in the cotton linter dispersion liquid, and the cotton linter dispersion liquid is carboxymethyl chitosan aqueous solution, the add-on of described dyestuff stock solution is based on the weight of reactive dyestuff It is calculated as 1-3.5wt% of the cotton linters dispersion liquid; after stirring evenly, the temperature is raised to 70° C. to obtain a d...

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Abstract

The present invention relates to a preparation method of dope-dyed cotton linter composite filament. The method comprises the steps of: 1) preparing a dye stock solution by dissolving a reactive dye in water to prepare a dye stock solution with reactive dye concentration of 20-40wt%; 2) preparing a spinning solution by adding the dye stock solution to a dispersion liquid of cotton linters, wherein the dispersion liquid of cotton linters is an aqueous solution of carboxymethyl chitosan, and the addition amount of the dye stock solution is 1-3.5wt% of the dispersion liquid of cotton linters calculated by the weight of the active dye; stirring uniformly and heating to 65-85 DEG C to obtain the dope-dyed spinning solution; 3) preparing a coagulating bath by dissolving citric acid and lemon sodium in water to prepare the coagulating bath, wherein the concentration of the citric acid in the coagulating bath is 35-45g / l, and the concentration of sodium citrate is 0.8-1.2g / l; and raising the temperature of the coagulating bath to the same temperature of the spinning solution; and 4) using the coagulating bath to conduct spinning on the spinning solution by a conventional method. The composite filament provided in the invention has high color fastness and high utilization rate of reactive dye.

Description

technical field [0001] The invention relates to the field of textiles, in particular to a method for preparing a dope-dyed cotton linter composite filament. Background technique [0002] The traditional cotton fiber dyeing method is piece dyeing, that is, dyeing after spinning into cloth. The post-processing process is long, high energy consumption, poor color fastness, large amount of dyeing sewage discharge, and heavy pressure on environmental protection. At present, raw cotton is also dyed, but in the dyeing process, the dyeing rate of reactive dyes is not high, and the color fastness is low, resulting in the waste of a large amount of reactive dyes and increasing the treatment cost of printing and dyeing wastewater. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing a dope-dyed cotton linter composite filament that can be dyed while spinning and has high color fastness. [0004] The techn...

Claims

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Application Information

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IPC IPC(8): D01F1/06D01F8/02D01F8/18D01D5/06D01D5/16
Inventor 关立平董哲英吴超
Owner ZHEJIANG TEXTILE & FASHION COLLEGE
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