Method for the treatment of textiles after washing

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...

AI Technical Summary

Benefits of technology

[0057] From the following seven examples, the concrete effects of the invention are described. Wherein, the commercialized cationic surfactants before processing are in the form of solid or liquid. Generally, the solid content of the cationic surfactant in liquid is between 5 and 15%. But after processing into commercialized textile softener, the solid content is only between 2 and 10%. To evaluate the precise properties of commercial products, as to liquid cationic surfactants, the experiments are conducted by the weight of liquid, but when the component amount is calculated, it should be on the basis of solid amount. In the present experiment, two commercial textile softeners A and B, and two raw materials of cationic softener C (fatty ammonium salt--solid) and D (polyamine--liquid) are tested.

are described. Wherein, the commercialized cationic surfactants before processing are in the form of solid or liquid. Generally, the solid content of the cationic surfactant in liquid is between 5 and 15%. But after processing into commercialized textile softener, the solid content is only between 2 and 10%. To evaluate the precise properties of commercial products, as to liquid cationic surfactants, the experiments are conducted by the weight of liquid, but when the component amount is calculated, it should be on the basis of solid amount. In the present experiment, two commercial textile softeners A and B, and two raw materials of cationic softener C (fatty ammonium salt--solid) and D (polyamine--liquid) are tested.

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 reasons of human safety and environmental pollution, the selection of enhancer additives is very difficult, resulting in no effective buffer solution being added into the cationic surfactant.

Although the methods mentioned above can achieve the softening effect as well, most of the cationic surfactants are chemical synthetics and no matter what kind of cationic surfactant is used, and regardless of how safe, to the ability of both the environment and the human body to safely handle this increase is limited.

To summarize above, residual detergents not only severely affect the health of human skin, but also make the fiber of the textile brittle.

It is stable with acids and inorganic salts, but it is unstable with alkalis.

However, it has no effect in decomposing and removing greasy dirt.

The lubricative effect of surfactant is limited by moistening ability.

Take the cationic surfactant, which is the best in lowering the static friction coefficient but is a poor cleaner.

Thus, in its physical properties, after the textile treated by chitosan has been dried, chitosan can not only protect the fiber, but also allow the branched fiber to be joined, and reduce the friction between fibers with each other.

However, the polysaccharides in its chemical properties are less lubricative than long-chain alkanes.

Compared with commercialized products, it is relatively poor in the softening effect.

Under moderate formulation, the solution will not be acidic enough to corrode the skin.

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