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High-washability fluorescent whitening method for fabric

A technology of fluorescent whitening and fluorescent whitening agent, which is applied in mercerizing, plant fiber, and dry-cleaning fiber products, etc., and can solve the problem of poor color fastness to washing due to the penetration of fluorescent whitening agents, poor penetration of fluorescent whitening agents into cotton fabrics, The molecular weight of the fluorescent whitening agent is small, so as to improve the color fastness to washing, not easy to decolorize and yellow, and improve the effect and fastness

Pending Publication Date: 2021-11-05
ZHEJIANG MIZUDA TEXTILE PRINTING & DYEING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small molecular weight of the fluorescent whitening agent, the padding method will make most of the fluorescent whitening agent only float on the surface of the fabric, but not penetrate into the interior of the fabric. The penetration of the fluorescent whitening agent into the cotton fabric Poor durability, resulting in that most of the fluorescent whitening agent will fall off after the cotton fabric garments are washed in use. Fluorescent white has poor washability, and the color of the garments will gradually turn yellow after washing several times, which will affect consumption. or use
[0003] Therefore, the existing cotton fabric whitening method has the problems of poor penetration of fluorescent whitening agent and poor color fastness to washing, and easy decolorization and yellowing after taking and washing.

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for fluorescent whitening of fabrics with high washability, comprising sequentially performing gray fabric singeing, scouring, oxygen bleaching, mercerizing, cylinder fluorescent whitening, softening finishing, and cutting and color matching;

[0023] Wherein, the mercerizing treatment is to pad the cloth in 200-220g / l NaOH, wherein the mass percentage of NaOH is 100%, the cloth clip is expanded, and the flushing and suction pump is turned on, 5 flushes and 5 suctions Alkali flushing can fully and quickly remove NaOH on the cloth surface, and ensure that the pH value of the final cloth is 7-8.

[0024] The fluorescent whitening of the rolling cylinder is as follows: the cloth is firstly washed with water for 1-2 times at a temperature of 60-65°C, and then washed with water for 6-8 times at a temperature of 88-93°C, and washed in the second stage. Add 0.25-0.5% owf fluorescent whitening agent to the head and tail of grade water washing respectively, and the amou...

Embodiment 2

[0028] A method for fluorescent whitening of fabrics with high washability, comprising sequentially performing gray fabric singeing, scouring, oxygen bleaching, mercerizing, cylinder fluorescent whitening, softening finishing, and cutting and color matching;

[0029] Wherein, the mercerizing treatment is to dip the cloth in 200g / l NaOH, wherein the mass percentage of NaOH is 100%, the cloth clip is expanded, and the shower and light alkali pump is turned on, 5 flushes and 5 suction light alkali flushes Suction, fully and quickly remove NaOH on the cloth surface, and ensure that the pH value of the final cloth is at 7.

[0030] The fluorescent whitening of the rolling cylinder is as follows: the cloth is firstly washed with water at a temperature of 62°C for 1 stage, and then washed with a secondary water for 6 stages at a temperature of 90°C, and 0.3 %owf optical brightener. The fluorescent whitening agent is a stilbene type polymer compound with a relative molecular mass of ...

Embodiment 3

[0034] A method for fluorescent whitening of fabrics with high washability, comprising sequentially performing gray fabric singeing, scouring, oxygen bleaching, mercerizing, cylinder fluorescent whitening, softening finishing, and cutting and color matching;

[0035] Wherein, the mercerizing treatment is to dip the cloth in 220g / l NaOH, expand the cloth clip, and turn on the flushing light alkali pump, 5 flushing and 5 suction light alkali flushing, fully and quickly remove the light alkali on the cloth surface. NaOH, to ensure that the pH value of the last machine cloth is at 8.

[0036] The fluorescent whitening of the rolling cylinder is as follows: the cloth is firstly washed with water at a temperature of 65°C for 1 stage, and then washed with a secondary water for 8 stages at a temperature of 88°C, and 0.5 %owf optical brightener. The fluorescent whitening agent is a stilbene type polymer compound with a relative molecular mass of 960-1000. The fluorescent whitening ag...

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 high-washability fluorescent whitening method for a fabric. The high-washability fluorescent whitening method for the fabric is characterized by comprising the following steps of sequentially carrying out gray fabric singeing, boiling-off, oxygen bleaching, mercerizing, rolling cylinder fluorescent whitening and softening after-treatment on a gray fabric, wherein the rolling cylinder fluorescent whitening comprises the steps that cloth is subjected to first-stage water washing and then subjected to second-stage water washing; and a fluorescent whitening agent is added to the head and the tail of the second-stage water washing respectively. The high-washability fluorescent whitening method for the fabric provided by the invention has the characteristics of improving the permeability of the fluorescent whitening agent and the washing color-changing fastness to clothes.

Description

technical field [0001] The invention relates to a method for treating cotton fabrics, in particular to a method for fluorescent whitening of fabrics with high washing resistance. Background technique [0002] White fabrics have always been the classic best-selling fabrics in the market, but conventional fabrics have always had the problem of insufficient whiteness in semi-bleached colors, especially pure cotton fabrics. At present, the whitening process for cotton fabrics is usually through the soft treatment of gray cloth singeing, scouring, oxygen bleaching, and finishing, and adding a liquid small molecule fluorescent whitening agent in the finishing and adopting the padding method. Perform whitening treatment. However, due to the small molecular weight of the fluorescent whitening agent, the padding method will make most of the fluorescent whitening agent only float on the surface of the fabric, but not penetrate into the interior of the fabric. The penetration of the f...

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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IPC IPC(8): D06L4/657D06L1/16D06M11/38D06B7/00D06M101/06
CPCD06L4/657D06L1/16D06M11/38D06B7/00D06M2101/06
Inventor 袁建强刘艳梅
Owner ZHEJIANG MIZUDA TEXTILE PRINTING & DYEING TECH CO LTD