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Method for dyeing rayon fiber by using reduced dye

A cotton fiber and dye technology, applied in the field of fiber dyeing, to achieve the effect of improving the utilization rate, improving the dispersion performance, and no white core

Active Publication Date: 2018-01-09
HMEI THREAD CO LTD OF YINBIN SICHUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This dyeing method is suitable for the dyeing of cotton fibers, not for the dyeing of rayon fibers

Method used

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  • Method for dyeing rayon fiber by using reduced dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for dyeing rayon fibers with vat dyes, comprising the steps of:

[0042] A. Preprocessing

[0043] Transport the rayon yarn to the bathtub, add water, dyes and flattened o, keep it for 9 minutes, then add caustic soda, then add bone glue, triethanolamine and water, keep it for 9 minutes, then add hydrosulfite;

[0044] B. Dyeing

[0045] After raising the temperature of the bathtub to 60°C, keep it warm for 45 minutes, and then add 5% of the total amount of hydrosulfite in step A; keep it for 15 minutes;

[0046] C.Washing

[0047] Wash the dyed fiber 4 times with water, each time for 9 minutes;

[0048] D. Oxidation

[0049] Add glacial acetic acid and hydrogen peroxide into the bathtub, keep it for 27 minutes, and wash with water;

[0050] E. Soaping

[0051] Add soda ash and soaping agent into the bathtub, raise the temperature to 95°C, keep it for 18 minutes, then drain and wash to obtain dyed yarn;

[0052] F. Post-processing

[0053] After the soa...

Embodiment 2

[0069] A method for dyeing rayon fibers with vat dyes, comprising the steps of:

[0070] A. Preprocessing

[0071] Transport the rayon yarn to the bathtub, add water, dyes and flattened o, keep it for 8 minutes, then add caustic soda, then add bone glue, triethanolamine and water, keep it for 8 minutes, then add hydrosulfite;

[0072] B. Dyeing

[0073] After raising the temperature of the bathtub to 65°C, keep it warm for 40 minutes, and then add 5% of the total amount of hydrosulfite in step A; keep it for 20 minutes;

[0074] C.Washing

[0075] Wash the dyed fiber twice with water, each time for 8 minutes;

[0076] D. Oxidation

[0077] Add glacial acetic acid and hydrogen peroxide into the bathtub, keep it for 25 minutes, and wash with water;

[0078] E. Soaping

[0079] Add soda ash and soaping agent into the bathtub, raise the temperature to 90°C, keep it for 15 minutes, then drain and wash to obtain dyed yarn;

[0080] F. Post-processing

[0081] After the soape...

Embodiment 3

[0095] A method for dyeing rayon fibers with vat dyes, comprising the steps of:

[0096] A. Preprocessing

[0097] Transport the rayon yarn to the bathtub, add water, dyes and flat additives, keep it for 12 minutes, then add caustic soda, then add bone glue, triethanolamine and water, keep it for 12 minutes, then add hydrosulfite;

[0098] B. Dyeing

[0099] After raising the temperature of the bathtub to 60°C, keep it warm for 45 minutes, and then add 10% of the total amount of hydrosulfite in step A; keep it for 18 minutes;

[0100] C.Washing

[0101] Wash the dyed fiber 3 times with water, each time for 12 minutes;

[0102] D. Oxidation

[0103] Add glacial acetic acid and hydrogen peroxide into the bathtub, keep it for 30 minutes, and wash with water;

[0104] E. Soaping

[0105] Add soda ash and soaping agent into the bathtub, raise the temperature to 100°C, keep it for 20 minutes, then drain and wash to obtain dyed yarn;

[0106] F. Post-processing

[0107] After...

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Abstract

The invention discloses a method for dyeing rayon fiber by using reduced dye, and belongs to the technical field of fiber dyeing. The method comprises the following steps: A, pretreating: conveying rayon yarns into a bathtub, adding water, the dye and peregal o, keeping for 9min, then adding caustic soda, then adding bone glue, triethanolamine and water, keeping for 9min, and adding sodium hydrosulfite; B, dyeing: raising the temperature of the bathtub to 60 DEG C, preserving heat for 45 minutes, then adding 5% of the total amount of the sodium hydrosulfite in the step A, and continuing keeping for 15 minutes; C, washing by using water: washing the dyed fiber by using water for 9min each time; D, oxidizing: adding glacial acetic acid and hydrogen peroxide into the bathtub, keeping for 27min, and washing by using water; E, soaping; F, posttreating. By the method, a series of problems which appear in the dyeing process using the vat dye in the prior art are solved; the method is designedfor rayon fiber dyeing, and has the advantages of uniform dyeing and no white core.

Description

technical field [0001] The invention relates to a method for dyeing rayon fibers with vat dyes, belonging to the technical field of fiber dyeing. Background technique [0002] Cotton is cotton, cotton fiber, which is a natural plant fiber. Rayon is not a natural fiber, it is a man-made fiber, a chemical fiber, also called viscose fiber, which has similar characteristics to cotton, softer hand feeling, and wrinkle-prone like cotton. The dyeing of fibers in the prior art includes direct dyeing, reactive dyeing, insoluble azo dyeing, vat dyeing, temporarily soluble vat dyeing, sulfur dyeing, nigrosine and phthalocyanine blue dyeing, wherein vat dyeing, Due to the molecular structure characteristics of the vat dye itself, the vat dye is dyed on the fiber in a very short time, and the dyeing is too fast, resulting in poor level dyeing of the fiber and white cores, and in the dyeing process, commonly used The reducing agent sodium hydrochloride is easily oxidized, which will caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/22D06P1/46D06P1/673D06P3/58
Inventor 张海何大雄雷洪袁利强李大万吕强
Owner HMEI THREAD CO LTD OF YINBIN SICHUAN
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