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Method for producing high-whiteness and low-strength-loss wool fabric

A high-brightness, fabric technology, used in textiles and papermaking, can solve the problems of strong wool damage and easy yellowing, and achieve the effect of improving whiteness, improving fabric whiteness and reducing the use of heating equipment.

Active Publication Date: 2021-06-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem that the traditional wool bleaching method needs to be bleached at high temperature and high pH, ​​which will cause great damage to the wool and is easy to yellow after long-term storage, the present invention provides a method using hydrogen peroxide to cool the wool. A method for producing high-whiteness and low-strength wool fabrics by pile bleaching treatment. The method of the present invention provides corresponding processes and parameters. The wool fabrics after finishing have high whiteness, less damage to wool fibers, good fabric feel, and the treatment process is green. pollution-free

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 producing high-whiteness and low-strength-loss wool fabric
  • Method for producing high-whiteness and low-strength-loss wool fabric

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Effect test

Embodiment 1

[0036] Hydrogen peroxide treatment is used to produce wool fabrics with high whiteness and low strength loss. The method of cold stacking, combined with ammonium molybdate, sodium percarbonate and danthraquinone, makes the wool fabric react slowly under mild treatment conditions, and improves the whiteness of the fabric. At the same time, it also avoids the damage of high temperature and high pH to wool fabric. The isoelectric point of wool is around 4.8, acid-resistant but not alkali-resistant, and the pH value near the isoelectric point can reduce the damage to wool. If the pH value is too high or too low, it will cause damage to wool to a certain extent, and will affect the wool. Therefore, it is necessary to explore the effect of the pH value of the bleaching solution on the bleaching effect of wool.

[0037] Bleach solution composition: 30% hydrogen peroxide 200mL / L, ammonium molybdate 0.05g / L, sodium percarbonate 2.5g / L, danthraquinone 10g / L, sodium pyrophosphate 2g / L, J...

Embodiment 2

[0043] Hydrogen peroxide is difficult to bleach under low temperature and low pH conditions, and usually needs to be bleached under higher temperature (>60°C) and alkaline (pH>10) conditions. The addition of low-temperature activator-ammonium molybdate, by activating hydrogen peroxide, generates a peroxyacid with stronger oxidation ability than hydrogen peroxide, which can achieve better bleaching effect, so different amounts of ammonium molybdate were explored Influence on wool bleaching performance.

[0044] Bleach solution composition: 30% hydrogen peroxide 200ml / L, ammonium molybdate 0.01-0.2g / L, sodium percarbonate 2.5g / L, danthraquinone 10g / L, sodium pyrophosphate 2g / L, JFC 2g / L, The pH value is 5.5. Concrete operation process is with embodiment 1.

[0045] According to GB / T 8424.2-1997 "Instrumental Evaluation Method for Relative Whiteness of Textiles" and ASTM D5035-2006 (2008) e1 "Tensile Properties of Textile Fabrics: Determination of Breaking Strength and Elongati...

Embodiment 3

[0049] The synergistic agent—the reaction of sodium percarbonate and hydrogen peroxide can also generate a peroxyacid, which has stronger oxidizing properties than hydrogen peroxide and can achieve better bleaching effect. Therefore, different processes have been explored. The effect of the dosage of sodium carbonate on the effect of wool bleaching.

[0050] Bleach solution composition: 30% hydrogen peroxide 200ml / L, ammonium molybdate 0.05g / L, sodium percarbonate 0-10g / L, danthraquinone 10g / L, sodium pyrophosphate 2g / L, JFC 2g / L, pH The value is 5.5. Concrete operation process is with embodiment 1.

[0051] According to GB / T 8424.2-1997 "Instrumental Evaluation Method for Relative Whiteness of Textiles" and ASTM D5035-2006 (2008) e1 "Tensile Properties of Textile Fabrics: Determination of Breaking Strength and Elongation at Breaking by Strip Method", the treated The bleaching effect of wool fabric is shown in Table 3. It can be seen that the bleaching effect of wool fabric...

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Abstract

The invention discloses a method for producing a high-whiteness and low-strength-loss wool fabric, and belongs to the field of fabric pretreatment. According to the method, hydrogen peroxide and ammonium molybdate are cooperated to treat the wool fabric; the wool fabric is finished in a cold pad-batch mode under the weak acid condition; the whole bleaching system slowly reacts under the mild condition; the strength damage of the treated wool fabric is small; and the effect cannot be achieved by a conventional wool dipping and bleaching method. The bleaching effect of the hydrogen peroxide is improved through the catalytic action of ammonium molybdate and sodium percarbonate, peroxy acid with higher oxidability is generated through a reaction, and mutual cooperation and mutual promotion are achieved, so that the whiteness of the wool fabric is obviously improved, and good wearability is obtained. Danthron can protect wool fibers and reduce damage to the wool fabric in the treatment process. While a good bleaching effect is ensured, excessive chemicals are not needed in the treatment process, so that the environmental pollution is extremely small, the process is simple and convenient, and the environment-friendly requirements are met.

Description

technical field [0001] The invention relates to a method for producing high-whiteness and low-strength wool fabric, which belongs to the field of fabric pretreatment. Background technique [0002] Wool fiber is one of the natural protein fibers and one of the earliest materials used by humans as textiles. During the growth process, most of the wool fibers undergo a color change, becoming light yellow or yellow. For some products with high requirements on whiteness and hand feel, wool fiber needs to be further bleached to improve the color and appearance of the product, to ensure and improve the quality of the product, and to increase the added value of the product. [0003] At present, the commonly used wool bleaching methods at home and abroad include oxidation bleaching, reduction bleaching and oxidation / reduction bleaching, all of which need to be carried out under higher temperature and higher pH conditions, but these methods have great damage to wool and the whiteness ...

Claims

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Application Information

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IPC IPC(8): D06L4/13D06L4/12
CPCD06L4/13D06L4/12
Inventor 范雪荣陈怡静高卫东袁久刚娄江飞徐进
Owner JIANGNAN UNIV
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