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Low-pollution and high-dyeing-degree activity printing process used on regenerated cellulose fibers

A technology of regenerated cellulose and reactive printing, applied in biochemical fiber treatment, dyeing method, fiber treatment and other directions, can solve the problems of dye diffusion, poor permeability, affecting dye penetration and transfer, and unstable color development of reactive dyes. Conducive to dyeing, improving the coloring rate, and the effect of no change in whiteness

Inactive Publication Date: 2015-12-02
江苏中诚印染股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Regenerated cellulose fibers include viscose, Tencel, Modal, bamboo fibers, etc. Regenerated cellulose fibers are soft, smooth, drapable, and hygroscopic, and are favored by consumers; but Due to the particularity of the fiber structure, in the reactive printing process, the color uptake rate of dyes is lower than that of pure cotton fabrics, and it is greatly affected by processing conditions (such as temperature, humidity, and vehicle speed), resulting in unstable color development of reactive dyes , the color consistency of the final product is poor, and sometimes it affects the style of the cloth surface
The previous method was to use the urea-alkali process, but this process is unfavorable for the color development of reactive dyes, especially dark colors (color matching with vinyl sulfone type reactive dyes) when the cloth is covered with alkali. It is easy to cause yellowing of the base fabric
[0003] Regenerated cellulose fiber takes rayon as an example: rayon is woven from viscose fiber, viscose fiber has a skin-core structure, and the outer structure is tight. During the dyeing process, the diffusion and permeability of the dye are poor, which affects the direction of the dye. Penetration and transfer inside the fiber, resulting in low color uptake rate, poor color brightness and poor color stability of rayon fabrics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 63″R30×30 / 68×68 rayon printing process:

[0024] (1) Pre-treatment: pre-printed and dyed rayon cloth is subjected to blank inspection, seam turning, singeing, enzymatic desizing, and urea rolling; among them, the singeing process adopts two positive and two negative singeing processes, and the singeing reaches Level 4: Enzyme desizing process adopts enzyme desizing agent Biolymase SDJ-50 concentration of 8g / L, refining agent concentration of 3g / L, treats for 90 minutes under the conditions of pH 7 and temperature 80°C, and continuously boils and bleaches Enzyme desizing treatment is carried out in the first half of the machine, and the desizing rate is 85%; the urea rolling process adopts the single rolling urea process, and 100g / L urea solution is pad-rolled on the setting machine.

[0025] (2) Printing: Print the pattern of black dots with white dots on the rotary screen printing machine. The temperature of the drying room of the printing machine is controlled at 100°...

Embodiment 2

[0031] 63″R20×20 / 60×60 rayon printing process:

[0032] (1) Pre-treatment: pre-printed and dyed rayon cloth is subjected to blank inspection, seam turning, singeing, enzymatic desizing, and urea rolling; among them, the singeing process adopts two positive and two negative singeing processes, and the singeing reaches Level 4: Enzyme desizing process uses enzyme desizing agent Biolymase SDJ-50 concentration of 10g / L, refining agent concentration of 5g / L, treatment at pH 7, temperature 80°C for 90 minutes, and continuous boiling and bleaching Enzyme desizing treatment is carried out in the first half of the machine, and the desizing rate is 85%. The urea rolling process adopts the single rolling urea process, and 100g / L urea solution is pad-rolled on the setting machine.

[0033] (2) Printing: Print three-color patterns with a dark blue background on the rotary screen printing machine. The temperature of the drying room of the printing machine is controlled at 110°C, and ensure ...

Embodiment 3

[0039] 63″40×40 / 120×80 tencel cloth printing process

[0040] (1) Pre-treatment: the pre-printed and dyed Tencel cloth is desized and dehaired by enzymes using a flat jigger, and then treated with urea on a setting machine; among them, the enzymatic desizing process uses the enzymatic desizing agent BiolymaseSDJ-50 The dosage is 1.5% owf, the dosage of refining agent is 0.5% owf, and it is treated for 2 hours under the conditions of pH 7 and temperature 80°C, and the desizing rate is 90%. urea solution.

[0041] (2) Printing: Print dark and light blue two-color patterns on the flat screen printing machine. The temperature of the drying room of the printing machine is controlled at 110°C, and ensure that the falling cloth is dry and not hot; among them, the dark blue color in the dark and light blue two-color printing prescription Paste formula: 20 parts of P-3R blue, 70 parts of B black, 30 parts of baking soda, 10 parts of resist salt S, 550 parts of sodium alginate raw past...

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PUM

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Abstract

The invention discloses a low-pollution and high-dyeing-degree activity printing process used on regenerated cellulose fibers. The process includes the specific steps of (1) pretreatment, (2) printing, (3) ageing and (4) washing. By the adoption of the method, the activity printing dyeing degree of the regenerated cellulose fibers can be increased through process improvement, and thus the stability and consistency of colored light of products are improved and the grade of the products is increased; meanwhile, the utilization rate of active dye is increased, the pollution level of printing and dyeing wastewater is lowered, and low-pollution and green energy-saving printing and dyeing can be better achieved.

Description

technical field [0001] The invention relates to the technical field of active printing, in particular to a process for performing active printing on cellulose fibers and improving the color uptake rate. Background technique [0002] Regenerated cellulose fibers include viscose, Tencel, Modal, bamboo fibers, etc. Regenerated cellulose fibers are soft, smooth, drapable, and hygroscopic, and are favored by consumers; but Due to the particularity of the fiber structure, in the reactive printing process, the color uptake rate of dyes is lower than that of pure cotton fabrics, and it is greatly affected by processing conditions (such as temperature, humidity, and vehicle speed), resulting in unstable color development of reactive dyes , the color consistency of the final product is poor, and sometimes it affects the style of the cloth. The previous method was to use the urea-alkali process, but this process is unfavorable for the color development of reactive dyes, especially dar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/38D06P3/66D06L1/14D06L1/16D06M16/00D06M13/432D06C9/00D06M101/06
Inventor 汤晓峰
Owner 江苏中诚印染股份有限公司
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