Method for improving wet rubbing color fastness of cotton fabric dyed by reactive dye

A technology of reactive dyes and moisture rubbing resistance, applied in the field of textile dyeing and finishing, can solve problems such as the large influence of reactive dyes on the hand feeling of cotton fabrics, and achieve the effect of improving the color fastness to moisture rubbing, simple process and less fabric damage.

Inactive Publication Date: 2021-04-16
南通金滢纺织产品检测中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common method is to add additives to the product, including darkening agents, wet rubbing fastness enhancers, resins, etc., but after finishing with additives, it will have a greater impact on the feel of cotton fabrics dyed with reactive dyes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put reactive yellow K-RN dyed pure cotton fabric in sodium hydroxide aqueous solution with a pH value of 11, stir at room temperature for 10 minutes, take it out and put it in finishing solution (5 parts of silicone softener, 1 part of water-based polyurethane, 0.1 part of polyvinyl alcohol parts, 93.9 parts in soft water), dipped twice and rolled twice, dried at 80°C for 50 minutes, after drying, placed in aqueous hydrochloric acid solution with a pH value of 5, stirred for 10 minutes, taken out, and dried at 80°C. The treated fabric was cut into samples and equilibrated in a constant temperature and humidity room (temperature 20°C, humidity 65%) for 24 hours, and the samples were tested for color fastness to wet rubbing, and the test results were color fastness to washing (stained Color grade and fading grade) increased by 1 grade, and its color fastness to wet rubbing increased by 1.5 grades.

Embodiment 2

[0019] Put the reactive dark blue K-R dyed pure cotton fabric in the sodium bicarbonate aqueous solution with a pH value of 9, stir at room temperature for 30 minutes, take it out and put it in the finishing solution (1 part of silicone softener, 5 parts of water-based polyurethane, 0.5 part of polyvinyl alcohol, 93.5 parts of soft water), dipping and rolling twice, drying at 80°C for 20 minutes, after drying, put it in an aqueous solution with a pH value of 7, stir for 30 minutes, take it out, and dry it at 80°C. The treated fabric was cut into samples and equilibrated in a constant temperature and humidity room (temperature 20°C, humidity 65%) for 24 hours, and the samples were tested for color fastness to wet rubbing, and the test results were color fastness to washing (stained Color grade and fading grade) increased by 1 grade, and its color fastness to wet rubbing increased by 1.5 grades.

Embodiment 3

[0021] Put reactive brilliant orange K-7R dyed pure cotton fabric in sodium carbonate aqueous solution with a pH value of 10, stir at room temperature for 20 minutes, take it out and put it in finishing solution (3 parts of silicone softener, 2 parts of water-based polyurethane, 1 part of polyvinyl alcohol parts, soft water 94 parts), dipped twice and rolled twice, dried at 80°C for 30 minutes, after drying, placed in acetic acid aqueous solution with a pH value of 6, stirred for 20 minutes, taken out, and dried at 80°C. The treated fabric was cut into samples and equilibrated in a constant temperature and humidity room (temperature 20°C, humidity 65%) for 24 hours, and the samples were tested for color fastness to wet rubbing, and the test results were color fastness to washing (stained Color grade and fading grade) increased by 1 grade, and its color fastness to wet rubbing increased by 1.5 grades.

[0022] The purpose of the present invention is to overcome the deficiencies...

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PUM

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Abstract

The invention discloses a method for improving the wet rubbing color fastness of a cotton fabric dyed by a reactive dye. The method comprises the following steps of 1, putting the pure cotton fabric dyed by the reactive dye into an aqueous solution with the pH value of 9-11, performing stirring at normal temperature for 10-30 minutes, and taking out the cotton fabric; 2, performing twice soaking and twice rolling on the fabric obtained in the step 1 in finishing liquid, performing drying at 80 DEG C for 10-50 minutes, and performing drying; and 3, putting the fabric in the step 2 into an aqueous solution with the pH value of 5-7, performing stirring for 10-30 minutes, taking out the fabric, and performing drying at 80 DEG C. The method has the beneficial effects that the wet rubbing color fastness of the finished pure cotton fabric dyed by the reactive dye can be remarkably improved; and the method does not need special equipment, is simple in process and small in damage to the fabric, and can also be used for after-finishing of the dyed fabric by a printing and dyeing mill.

Description

technical field [0001] The invention relates to a method for improving the color fastness to wet rubbing of cotton fabrics dyed with reactive dyes, belonging to the technical field of textile dyeing and finishing. Background technique [0002] Reactive dyes have become the main dyes for dyeing cotton and cotton fabrics due to their advantages such as complete color spectrum, bright color, moderate price and simple process. However, the color fastness to wet rubbing of dark fabrics dyed with reactive dyes is low, usually only grade 1-2. Therefore, how to improve the color fastness to wet rubbing of its dyeing is one of the technical difficulties in the research of the dyeing and finishing industry. [0003] The main reasons for the poor color fastness to wet rubbing of cotton dyed with reactive dyes are: on the one hand, the dye is hydrolyzed, physically adsorbed on the fiber, and the binding fastness to the fiber is low, and it falls off after receiving the rubbing solution...

Claims

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Application Information

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IPC IPC(8): D06P5/04D06P5/08D06P5/10D06P3/66
Inventor 黄方张煊方莹
Owner 南通金滢纺织产品检测中心有限公司
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