Method for the treatment of textiles after washing

a textile and textile technology, applied in the field of textile treatment, can solve the problems of residual detergents, no effective solution to residual detergent problems, and increase in the amount of antifoaming agents in the formulas

Inactive Publication Date: 2002-12-19
CHANG WEN CHUNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of dissolution often occurs in common detergents, which results in residual detergents on the textile due to insufficient solubility.
There is no effective solution to the problem of residual detergents, which is difficult primarily because the detergents contain anionic surfactant, a base and various additives.
Especially in recent years, the claim of "ease of rinse" of the concentrated detergents actually results in an increase in the amount of antifoaming agents in the formulas and gives people the false impression that the detergent is completely removed from the textile; this gives rise to the problem of residual detergents.
In addition, residual detergents adversely affect textiles after washing, especially in relation to the use of textile softeners.
It is stable in acids and inorganic salts, but is unstable with bases.
Therefore, after washing textiles with detergents containing anionic surfactants, textile softeners containing cationic surfactants are less effective without washing with a sufficient quantity of water.
When a large amount of detergent is added the situation of the detergent residue and incomplete dissolution is more serious.
Furthermore, commonly used water is mostly slightly more base (that is, pH value is greater than 7 slightly), thus the instability of the cationic surfactant is increased and the effectiveness of the detergent is decreased.
But there is some doubt regarding the safety of this method.
For reason

Method used

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  • Method for the treatment of textiles after washing

Examples

Experimental program
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Effect test

experiment example 2

[0059] FIG. 4 shows the changes of pH value after 5% chitosan solution is added respectively in 2L water dissolving 0.1 g of A detergent, 2L water dissolving 0.2 g of A detergent, and 2L water. This experiment is conducted by stirring 5 min and then testing the pH value to simulate the case of chitosan adjustment after the base of the detergent remains. The result shows that even if a little amount of chitosan is added, it is effective in neutralizing the basicity of water and lowering the pH value.

experiment example 3

[0060] FIGS. 5a and 5b show the reduction of surfactant activities of the anionic surfactant due to chitosan. In FIG. 5a, 5 g of A detergent is dissolved in 12 L water. 1 g of 9% C cationic surfactant is added directly into 150g of the above detergent solution. After standing 20 min, the precipitants happen. C cationic surfactant is combined with anionic surfactants in water to form cloudy precipitants. In FIG. 5b, 4 g chitosan solution containing 5% chitosan and 2% acetic acid is first added into 150 g of same detergent solution, and then 1 g of 9% C cationic surfactant is added. After standing 20 min, it is found that the addition of chitosan does effectively reduce the surfactant activities of the anionic surfactant and thus reduce the combination with the cationic surfactant. From the result of experiments, the more chitosan added, the better the effect of reducing the surfactant activities of the anionic surfactant and the less precipitant happen.

experiment example 4

[0061] When 50 g of commercial softener is neutralized with 0.1N NaOH, the changes of the pH values with or without addition of chitosan are shown in FIG. 6. From the experimental data of the FIG. 6, all the pH values of the commercial textile softeners A, B, C, and D are rapidly increased in basic environment, and the viscosity is thus increased. Since the major components of the softener all are positively charged cationic surfactants, the pH value may seriously affect the amount of charges and may further affect its function. From the figure, it also shows some brands prepare the softener with a lower pH value. Although an acidic environment is good for increasing the amount of charges in the cationic surfactants, it is not good for human skin. And it has no resistance to the environment, that is, it has no effect of practical adjusting environment. If excess acid is added without neutralization, it harms both the human body and the textile. After sample C is added with chitosan ...

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Abstract

The invention provides a method for the treatment of textile after washing, using chitosan to reduce the surfactant activities of the residual anionic surfactant on textile after washing and to neutralize the residual base on textile after washing. The chitosan is represented by the formula (I):

Description

BACKGROUND OF INVENTION[0001] 1. Field of Invention[0002] The invention relates to a method for the treatment of textiles, and particularly, to a method for the treatment of textiles after washing, which uses chitosan to reduce the surfactant activities of the residual anionic surfactant on textiles after washing and to neutralize the residual base on textiles after washing.[0003] 2. Related Art[0004] Surfactants and human life are closely related since petrochemical surfactants have been synthesized. Consequently, in addition safely of use, it has always been our goal to prevent severe environmental pollution.[0005] For example, almost all the components of common detergents include anionic surfactant, a base and other additives. However, the problem of dissolution often occurs in common detergents, which results in residual detergents on the textile due to insufficient solubility. There is no effective solution to the problem of residual detergents, which is difficult primarily be...

Claims

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Application Information

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IPC IPC(8): C11D3/22C11D11/00D06M13/46D06M15/03D06M23/06
CPCC11D3/227C11D11/0017D06M23/06D06M15/03D06M13/46
Inventor CHANG, WEN CHUNG
Owner CHANG WEN CHUNG
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