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Method for preventing ozone bleached cotton fabric from yellowing

A cotton fabric and fabric technology, applied in the direction of plant fibers, textiles, papermaking, dry-cleaning fiber products, etc., can solve the problems of performance degradation, fabric brightness dimming, affecting fabric performance, etc., achieve stable performance indicators, high fabric stability, The effect of improving the properties of fabrics

Inactive Publication Date: 2017-05-10
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this way, the yellowing of the fabric is very serious when the fabric is placed, especially when it is exposed to light conditions, and some of them are brittle and damaged, and the brightness of the fabric becomes dark, which affects the performance of the subsequent processing of the fabric; After the fabric is placed for one month, the whiteness value decreases by about 10%, and the degree of polymerization decreases by more than 8%; after two months, the whiteness value decreases by more than 15%, the degree of polymerization decreases by more than 10%, and the fabric brightness changes significantly Dark, performance drops noticeably

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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  • Method for preventing ozone bleached cotton fabric from yellowing
  • Method for preventing ozone bleached cotton fabric from yellowing
  • Method for preventing ozone bleached cotton fabric from yellowing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Ozone Bleaching of Fabrics

[0035] The cotton fabric is soaked in ozone aqueous solution for a period of time to obtain ozone-bleached cotton fabric.

Embodiment 2

[0036] Example 2: Anti-Yellowing Treatment of Ozone Bleached Fabrics

[0037] The same ozone-bleached fabric was treated separately as follows:

[0038] plan 1:

[0039] (1) Immerse the ozone-treated cotton fabric into a 3% free radical scavenger solution and keep it immersed for 20 minutes.

[0040] (2) Place the washed cotton fabric in hot water at 50°C, keep it in contact for a certain period of time, and then place the fabric in a cold water bath to fully wash the fabric.

[0041] (3) Place the washed fabric above in an oven at 70° C. for a certain period of 3 hours.

[0042] Wherein the free radical scavenger was tested respectively: cycloalkanol gallate, amino gallate A, amino gallate B, amino gallate C; wherein the amino gallate structural formula is as formula (1), The R groups of A, B, and C are respectively

[0043] Scenario 2:

[0044] (1) Immerse the ozone-treated cotton fabric in 3% sodium bisulfite solution and keep it immersed for 20 minutes.

[0045] (2...

Embodiment 3

[0055] The same ozone bleached fabric was treated as follows:

[0056] (1) Immerse the ozone-treated cotton fabric into the amino gallate A solution with a concentration of 1%, and keep soaking for 30 minutes;

[0057] (2) Put the washed cotton fabric in hot water at 60°C, keep it in contact for a certain period of time, and then place the fabric in a cold water bath to fully wash the fabric;

[0058] (3) Place the washed fabric above in an oven at 80° C. for a certain period of time to dry.

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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PUM

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Abstract

The invention discloses a method for preventing ozone bleached cotton fabric from yellowing, and belongs to the technical field of textiles. A free-radical scavenger processing method is used for removing residual hydroxyl free radical, active oxygen atoms and others on the fabric, the fabric property is effectively improved, and the stabilities of a whiteness value, a polymerization degree and other performance indexes in the subsequent placing process of the fabric are guaranteed. The method disclosed by the invention is simple, after being placed for one month, the whiteness value of the processed fabric is only lowered by 3%, and the polymerization degree is only lowered by 5%; after being placed for two months, the whiteness value of the processed fabric is only lowered by 5%, and the polymerization degree is only lowered by 8%; the stability of the fabric is especially high and the smooth operation of the subsequent processing can be sufficiently guaranteed.

Description

technical field [0001] The invention relates to a method for preventing yellowing of ozone-bleached cotton fabrics, belonging to the technical field of textiles. Background technique [0002] Ozone bleaching has the technical advantages of high efficiency and environmental protection. The cotton fabric bleached by ozone has high whiteness, good effect of removing impurities, and the surface is clean and smooth. However, after a period of time, the fabric will turn yellow and the whiteness is obvious. Decrease the brightness to dim. [0003] However, the reason for the yellowing of fabrics is not yet clear. Some studies speculate that the residual material groups after ozone bleaching catalyze the functional groups on the fabric, and the ring-opening reaction of fiber molecules occurs gradually, causing cellulose macromolecules to undergo a catalytic reaction. Chain degradation, brittleness, and yellowing. [0004] At present, the methods for inhibiting the yellowing of ozo...

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): D06L4/50D06L1/16D06M11/34D06M13/372D06M101/06
CPCD06L1/16D06M11/34D06M13/372D06M2101/06
Inventor 王强范雪荣张杰余圆圆王平袁久刚崔莉张颖
Owner JIANGNAN UNIV
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