A method for printing and dyeing fabrics with vat dyes

A technology of dyes and fabrics, applied in the field of vat dyes printing and dyeing fabrics, which can solve the problems of unfavorable large-scale use, etc., and achieve the effects of good level dyeing and washing resistance, large economic value, and high utilization rate

Active Publication Date: 2016-12-14
南通凡百信新材料有限公司
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is not conducive to large-scale use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for printing and dyeing fabrics with vat dyes
  • A method for printing and dyeing fabrics with vat dyes
  • A method for printing and dyeing fabrics with vat dyes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Cotton was dyed with indigo dyes using the method disclosed in this invention.

[0028] The masterbatch in the form of an aqueous mixture was prepared by mixing the following amounts in grams per liter of masterbatch (grams per liter):

[0029]

[0030] Using a pH meter, the pH value of the masterbatch was 13.34, and the oxidation-reduction potential (ORP) was -800 millivolts. The masterbatch was kept at room temperature for 2 hours without stirring, then a portion of it was mixed with additional bisulfite, borohydride, thiourea dioxide, sodium sulfate and diluted with water to prepare the following dye bath , expressing its content in units per liter of dyeing bath:

[0031]

[0032] The total amount of SBH added to form the dyebath (in g / L) (amount added to masterbatch + additional amount added to dyebath) was 0.0301+0.0156=0.0457 g / L. The total amount of SBS added to form the dyebath was 0.902+0.468=1.37 g / L. The total amount of TD added to form the dyebath ...

Embodiment 2

[0037] Example 2: Dyeing of cotton with indigo dyes using the method disclosed in this invention.

[0038] Cotton was dyed as described in Example 1, but with an initial pH of 9.65 in the dyebath. The dyebath color test results are relative to the L * a * b * The color on the color scale is L * : 16.26, a * : 1.72,b * : -12.71 measured on fabric dyed with indigo dye (using SBH, SBS under similar conditions). For dyed fabrics, ΔL * -0.56, Δa * =0.45, Δb * =0.61, ΔE=0.94. On a scale of 1-5, the wash resistance test after 5 washes received the highest rating of 5.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for dyeing fabrics by using borohydride, bisulfite and thiourea dioxide (TD) as composite reducing agents. Wherein, bisulfite and borohydride are used to prepare dithionite, and its consumption is half of that when not mixed with thiourea dioxide, and the consumption of thiourea dioxide is about one-tenth of that of dithionite. Compared with the dyeing method using only dithionite as reducing agent, the method has no obvious difference in dyeing effect, but the reducing agent used is relatively safer, more stable, has higher utilization rate, and has greater economic value. At the same time, the fabric dyed by this method has good level dyeing property and washing resistance, and is an ideal dyeing method.

Description

technical field [0001] The invention relates to a method for printing and dyeing fabrics with vat dyes, specifically, the invention relates to a method for printing and dyeing fabrics using borohydride, bisulfite and thiourea dioxide (TD) as composite reducing agents. Background technique [0002] Vat dyes are dyes with excellent properties in dyes. According to its main chemical structure, it can be divided into two categories: indigo and anthraquinone. It has a relatively complete chromatogram, bright color, and high fastness to soaping and sunlight. Vat dyes are insoluble in water. When dyeing, they must be reduced and dissolved in a strong alkaline reducing solution to form leuco-salt sodium salts to dye fibers. After oxidation, they will return to insoluble dye lakes and fix them on fibers. They are mainly used for dyeing. Dyeing and printing of cellulose fiber and vinylon, some can also be used to dye polyester fiber. [0003] Since the advent of vat dyes, dithionit...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/673D06P1/642D06P1/22
Inventor 许立新
Owner 南通凡百信新材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap