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A dyeing and finishing method for improving the color fastness of fabrics

A color fastness and fabric technology, applied in dyeing, textiles and papermaking, etc., can solve the problems of affecting the appearance of clothes, fading, and affecting appearance, and achieve the effect of improving anti-ultraviolet radiation performance, improving bonding strength, and preventing ultraviolet rays

Active Publication Date: 2022-04-19
ANHUI HENGYI TEXTILE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In daily clothing, people not only pursue the comfort, but also the color and style of the clothes. For bright colored clothes, a slight color change will be very obvious during the long-term cleaning process, which will affect the appearance. Therefore, the color fastness of the fabric is The key to affecting the color change of clothes. The existing dyeing of clothes usually uses intermolecular force or physical adsorption to adsorb the dye on the surface of the fiber and inside the fiber to achieve the purpose of dyeing. However, due to the weak force between the dye and the fiber , after washing and washing, it is easy to peel off the dye and fade, which will affect the appearance of the clothes. At the same time, the pigment usually contains a large number of unsaturated bonds, which are easy to oxidize and change color under the irradiation of high-intensity ultraviolet rays, which will affect the appearance of the clothes.

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
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  • A dyeing and finishing method for improving the color fastness of fabrics
  • A dyeing and finishing method for improving the color fastness of fabrics
  • A dyeing and finishing method for improving the color fastness of fabrics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The specific preparation process of color-fixing finishing agent is as follows:

[0019] Step 1: Add 13.6g of p-hydroxyacetophenone into 163g of 70-80°C hot water and stir to dissolve, then keep the temperature constant and add 8.1g of formaldehyde solution with a mass concentration of 37% and stir evenly, then adjust the concentration of the solution with hydrochloric acid pH=1, dropwise add 5.04g of concentrated ammonia water dropwise, stir vigorously while adding dropwise, control the drop rate to be 6-7mL / min, keep constant temperature reaction for 5-6h after dropwise addition is complete, then carry out vacuum distillation to obtain White powder;

[0020] Step 2: Add 10g of the white powder prepared in step 1 into 150mL of ethanol and stir to dissolve, then add 16.8g of epichlorohydrin to it, heat up to 75°C, and add 3.2g of 50% hydrogen hydroxide to the reaction vessel Sodium solution, constant temperature reflux, stirring and reacting for 12 hours, then evaporat...

Embodiment 2

[0023] The specific preparation process of color-fixing finishing agent is as follows:

[0024] Step 1: Add 9.06g of p-hydroxyacetophenone into 163g of 70-80°C hot water and stir to dissolve, then keep the temperature constant and add 5.4g of formaldehyde solution with a mass concentration of 37% and stir evenly, then adjust the concentration of the solution with hydrochloric acid pH=1, dropwise add 5.04g of concentrated ammonia water dropwise, stir vigorously while adding dropwise, control the drop rate to be 6-7mL / min, keep constant temperature reaction for 5-6h after dropwise addition is complete, then carry out vacuum distillation to obtain White powder;

[0025] Step 2: Add 10g of the white powder prepared in step 1 into 150mL of ethanol and stir to dissolve, then add 16.8g of epichlorohydrin to it, heat up to 75°C, and add 3.2g of 50% hydrogen hydroxide to the reaction vessel Sodium solution, constant temperature reflux, stirring and reacting for 12 hours, then evaporat...

Embodiment 3

[0028] The specific preparation process of color-fixing finishing agent is as follows:

[0029]Step 1: Add 13.6g of p-hydroxyacetophenone into 163g of 70-80°C hot water and stir to dissolve, then keep the temperature constant and add 8.1g of formaldehyde solution with a mass concentration of 37% and stir evenly, then adjust the concentration of the solution with hydrochloric acid pH=1, dropwise add 5.04g of concentrated ammonia water dropwise, stir vigorously while adding dropwise, control the drop rate to be 6-7mL / min, keep constant temperature reaction for 5-6h after dropwise addition is complete, then carry out vacuum distillation to obtain White powder;

[0030] Step 2: Add 10g of the white powder prepared in step 1 into 150mL of ethanol and stir to dissolve, then add 16.8g of epichlorohydrin to it, heat up to 75°C, and add 3.2g of 50% hydrogen hydroxide to the reaction vessel Sodium solution, constant temperature reflux, stirring and reacting for 12 hours, then evaporate...

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
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Abstract

The invention discloses a dyeing and finishing method for improving the color fastness of fabrics. The specific dyeing and finishing process is as follows: add cotton fibers to a sodium hydroxide solution with a mass concentration of 5% for treatment, then dry them, then add direct dyes into water to stir and dissolve, Then add epichlorohydrin, cotton fiber and sodium hydroxide, and react to obtain dyed fiber; weave the dyed fiber to obtain yarn, and add the obtained yarn to the color-fixing finishing agent and impregnate it to weave to obtain high color fastness fabric. In the present invention, a large number of hydroxyl groups on the surface of cotton fibers are exposed after pretreatment of the fibers, and then they can be combined with dyes through chemical bonds to improve the bonding strength between dyes and fibers. Composite a layer of protective film, the protective film and the color material are connected by chemical bonds, the compound is firm, and it is not easy to peel off under strong external force, which further realizes the protection of the color material and improves the color fixation of the color material.

Description

technical field [0001] The invention belongs to the field of fabric preparation and relates to a dyeing and finishing method for improving the color fastness of fabrics. Background technique [0002] In daily clothing, people not only pursue the comfort, but also the color and style of the clothes. For bright colored clothes, a slight color change will be very obvious during the long-term cleaning process, which will affect the appearance. Therefore, the color fastness of the fabric is The key to affecting the color change of clothes. The existing dyeing of clothes is usually to adsorb the dye on the surface of the fiber and inside the fiber through intermolecular force or physical adsorption to achieve the purpose of dyeing. However, due to the weak force between the dye and the fiber , After washing and washing, it is easy to peel off the dye and fade, which affects the appearance of the clothes. At the same time, the pigment usually contains a large number of unsaturated ...

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
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P3/62D06P1/00D06P1/673D06P5/08D06P5/04
CPCD06P3/62D06P1/00D06P1/6735D06P5/08D06P5/04
Inventor 李贺
Owner ANHUI HENGYI TEXTILE TECH CO LTD
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