The role of glacial acetic acid in the washing industry
1. Acid dissolving function in stain removal
Acetic acid as an organic vinegar, it can dissolve tannic acid, fruit acid and other organic acid characteristics, grass stains, juice stains (such as fruit sweat, melon juice, tomato juice, soft drink juice, etc.), medicine stains, chili oil and other stains, these stains contain organic vinegar ingredients, acetic acid as a stain remover, can remove the organic acid ingredients in the stains, as for the pigment ingredients in the stains, Then with oxidative bleaching treatment, all can be removed. Moreover, when washing heavy clothes, often because the rinsing is not thorough enough, the clothes will dry or ring after drying. If it is not too serious, it can be sprayed with water containing acetic acid or wiped with a towel with acetic acid water to remove drying and ring stains.
2. Neutralize residual alkali
Acetic acid itself is weakly acidic and can be neutralized with bases.
(1) In chemical stain removal, the use of this property can remove alkaline stains, such as coffee stains, tea stains, and some drug stains.
(2) The neutralization of acetic acid and alkali can also restore the discoloration of clothes caused by the influence of alkali.
(3) The use of the weak acidity of acetic acid can also accelerate the bleaching reaction of some reduction bleach in the bleaching process, because some reduction bleach can accelerate the decomposition under vinegar conditions and release the bleaching factor, therefore, adjusting the PH value of the bleaching solution with acetic acid can accelerate the bleaching process.
(4) The acid of acetic acid is used to adjust the acid and alkali of the clothing fabric, and the clothing material is treated with acid, which can restore the soft state of the clothing material.
(5) Wool fiber fabric, in the ironing process, due to the ironing temperature is too high, resulting in damage to wool fiber, resulting in light phenomenon, with dilute acetic acid can restore wool fiber tissue, therefore, acetic acid can also be used to deal with the light phenomenon caused by ironing.
3. solid color to prevent fading
Some clothes are seriously faded, the clothes have just been put into detergent, a large number of dyes will be dissolved, it is difficult to continue washing. Acetic acid can be used for dye lifting treatment. First of all, do not stop washing, and complete the washing of clothes as soon as possible. After taking out the clothes, do not pour out the water containing the dye, immediately add an appropriate amount of glacial acetic acid, immediately after stirring the clothes back into the water, soak for 10-20 minutes, and often turn during the soaking process to prevent uneven. After treatment, the dye in the water is “lifted back” to the clothing. After that, continue to rinse with water containing acetic acid, dehydration and dry. This can not only effectively stop the fading of clothing, but also make the clothing color beautiful as new. Especially for silk fabrics, ice acetic acid is used to fix the color, protect the silk surface fiber, reduce its fading, and extend the wearing life.
The role of glacial acetic acid in textile printing and dyeing
1. in the dyeing process, glacial acetic acid can play a role in fixing the dye. During the dyeing process, the dye needs to chemically react with the fiber molecules in order to firmly adhere to the fiber. As a neutralizing agent, glacial acetic acid can adjust the pH value between dye and fiber, so that it is in a good reaction condition.
2. glacial acetic acid can also form a stable complex with dyes, increasing the binding force of dye molecules and fiber molecules, thereby improving the firmness and durability of dyeing.
3. In textile finishing, adding an appropriate amount of glacial acetic acid can form more ester bonds between fiber molecules, thereby improving the wrinkle resistance and washable resistance of textiles.
Application case of glacial acetic acid in textile printing and dyeing industry
1. Cotton dyeing
In the process of cotton dyeing, glacial acetic acid is used as an assistant to help the dye penetrate into the cotton fiber better and improve the dyeing effect. In addition, it can also be used to adjust the pH value of the dye solution to promote the combination of the dye and cotton fiber.
2. Wool dyeing
Wool fibers have a layer of grease on the surface, which is difficult for dyes to penetrate. In this case, glacial acetic acid is used as an auxiliary agent to remove the grease on the surface of the wool fiber and improve the permeability and dyeing effect of the dye.
3. Polyester dyeing
Polyester is a synthetic fiber that is hydrophobic and difficult to penetrate by dyes. In order to improve the dyeing effect of polyester, glacial acetic acid is used as an additive to help the dye penetrate into the fiber better.
4. Silk dyeing
Silk is a delicate textile that is very sensitive to changes in temperature and pH. In the process of silk dyeing, glacial acetic acid is used as an assistant to control the temperature and pH value of the dyeing solution to ensure the dyeing effect and quality.
5. Printing process
In the printing process, glacial acetic acid is used as the auxiliary agent of the acid printing paste to improve the printing effect and precision. In addition, it can also be used to adjust the pH value of the printing paste to promote the combination of the printing paste and the fiber.
Post time: May-07-2024
