Understand dyeing and printed soap washing agent

The current situation of soap washing

During the dyeing process, there are many unsolved dyes, hydrolyzed dyes, alkalines, and other chemicals in the dye solution. It must be washed and soap to wash this impurities to improve the fabric Fresh color, color fastness and cleanliness. The process of removing these impurities is called soap washing. The active dye has the advantages of colorful chromatography, easy coloring, bright color, low price, simple craftsmanship, and good fastness. Therefore, active dyes are widely used in printing and dyeing processing of fiber such as cellulose. It is understood that 80%of the fiber on the market uses active dye dyeing or printing.

The purpose of soap washing

1. Symptoms

There are many types of active dyes and a variety of chemical structures, and their response efficiency is different, but they cannot completely react with cellulose fiber. In addition, while dyeing fibers, dyes will also hydrolyze, that is, active activity in active dyes The base is replaced by the hydroxyl group to form a hydrolyzed dye. These unsteady dyes and hydrolyzed dyes are very similar to the original active dyes, so they are easily adsorbed on the fiber surface and spread into fiber. In the case of alkaline and temperature and pressure, these unsteady dyes and hydrolyzed dyes (floating colors) are partially combined with fibers, which can easily cause color seepage and re -staining (secondary dyeing), wet friction, dry rubbing firmly Degree, water washing fastness, and anti -staining performance are not ideal. The main purpose of soap washing is to remove floating colors to ensure the brightness of the fabric and various physical properties, that is, to improve the quality of the product.

2. Printing

According to market data statistics, the active dye printing is about 30%of the dyes. In addition to not being fixed with dyes, impurities such as printed pastes will affect the printing effect and color and light accuracy of the fabric. Therefore, the printed soap washing is to wash out unsteady dyes and printed pastes from the fabric, but the washed foot water will still be stained on the printed fabric, so that the dyeing of the pattern is reduced, so that there is no pattern part of the pattern. The white land is stained. Therefore, the printed soap washing is generally washed with anti -dipped color soap to ensure that the dirt can be completely washed down, and all the dirt washed will no longer be stained on the fabric. Therefore, the printed soap washing is higher than the staining soap washing. In other words, the soap washing agent used by printing can correspond to the dyeing of the fabric.

原 The principle of soap washing

At present, the soap washing agents on the market are mainly surfactants, chemical types, and polymer types. However, with the development of technology, the specific types of soap washing agents are fusion. However, the principle of soap can basically be attributed to: increased, chelated, decentralized, clean, and emulsifiers.

Principle reference:

Increasing: Increase the solubility of the residue on the fabric and the unblocked fuel.

Chelating: Chelating with high -priced metal ions, softening washing water.

Diversion: Anti -cohesion effect on solid dirt and decentralized effects.

Clean: Wash the auxiliary agent and unblocked fuel on the fabric.

Emulsification and anti -defenses: The cleaning of the cleaning of the cleaning agent and fuel are evenly emulsified in the solution to form a rubber beam to prevent it from being defiled on the fabric. Alkaline buffer, replacing alkaline substances such as pure alkali in general cleaning.

✥ Product characteristics

Can destroy unsteady dyes, significantly reduce the concentration of dyes in the working solution, thereby improving the effect of soap washing

Effectively prevent dye floating color return, especially suitable for dark and printed fabrics

There is no affinity for fiber, easy to clean

Liquid products, no bubbles, low viscosity, easy to use