Surfactants in the textile dyes industry

The dye bath has a large surface tension, does not wet the fabric so the dye does not penetrate. Adding surfactant reduces surface tension allowing dye molecules to move inside the fiber. As the absorbent concentration increases, the permeability and penetration of the solution increases, but counting a certain increase in the concentration of the absorbent will not increase the permeability anymore. The most absorbent are anionic surfactants such as soap, red oil, and alkyl sulfate-like compounds.

– NB soak (Nekal BX) is the sodium salt of butyl naphthalene sulfonate

Nekal BX is usually produced in brown paste, easily soluble in water, highly absorbent, so it is used as absorbent when cooking as well as dyeing.

– Soap

Sodium salt of some fatty acids with the general formula CnH2n + 1COONa. Soap is a surfactant that has long been produced and is the most widely used. It has the advantage of being cheap, has a strong bleaching effect, so it is used primarily for washing. However, soap has the biggest disadvantage that when it comes to hard water, it will precipitate and reduce its performance significantly.

2C17H35COONa + CaCO3 = Ca (C17H35COO) 2 + Na2CO3

– Red oil (alizarin oil)

As an ester of rixinoleic acid. The technical product of red oil is a viscous liquid, pale yellow, dissolves well in cold water to create a weak alkaline environment. The primary effect of red oil is as a soothing agent, commonly used in the bleaching and dyeing process to increase its infiltration capacity.

Chemical dyes. Currently, many surfactants have different names but they have the same formula as red oil.

– Invadine (LU, LUExtra, MC, MC new / MR)

The above active substances Invadune belong to the anion family produced by Ciba. They have the most common feature is the ability to absorb well. In addition, each substance with different symbols has its own characteristics when used, so please review the documentation.

– Fluorite 4028 (Cognis)

A compound of the aliphatic sulphate family, which has a leaching effect and is used in the cooking and alkali polishing process.

– Cottoclarin (Cognis)

As a soaking agent in desizing, cooking and bleaching of cotton and blended fabrics, suitable for interrupted or continuous and semi-continuous bleaching.


+ Colorless pastes dissolve well in warm water (50oC).

+ Ability to absorb and emulsify at any temperature.

+ Suitable for all bleaching processes can be used as a soak agent for all types of dyes except for cattion dyes.

+ Stable in storage for at least one year.

– Absorbent Wetta-NTD-93

Wetta-NTD-93 (wetting agent) is produced from some typical vegetable fat oils, synthesized to form a derivative with the main active ingredient is acidrixinoleic sodium sulfo ester.

The active ingredient is formulated with some additives to enhance the quality and selective activity. Through research, we have selected the appropriate production technology and additives, creating a product that is both highly absorbent and quick-absorbing, and has the necessary cleaning and emulsifying properties to meet the requirements. technology for pretreatment of cotton fabrics, synthetic cotton blends and other knitted articles.

The main specification of the product:

– A liquid, viscous dark yellow, slight odor.

– The chemical composition consists of a mixture of anionic surfactants, which can reduce surface tension and quick penetration.

– Content of surfactant in the product: 65 + 1%; density at 20oC: nearly 1.1; pH = 7.

– Easily soluble in water, does not precipitate in hard water.

– Outstanding features: infiltration, emulsification and cleaning.

– High wetting ability, medium foaming level.

– Stable in acidic, weak alkaline and neutral environments, not reducing activity in the presence of electrolytes.

Wetta-NTD-93 soaking agent is highly effective when cleaning with cotton, blended fabric, knitted fabric in normal and high pressure equipment, capillary of cotton fabric reaches over 130mm in 30 minutes . It is also used to prepare dye solutions with direct dyes, sulfur dyes, azol dyes and reactive dyes.

Wetta-NTD-93 has been tested and applied to tens of thousands of meters of fabric on the production line of the dyeing and printing factory (8-3 Textile Company) with good results. Product quality is equivalent to similar products (imported from foreign countries like

Tinoventin JU and Invadin LU (Ciba-Geigy), Slovapon N (Czechoslovakia) Prawozell Wopp – 100 / N (Germany) OP-10 (Former Soviet Union), Coloratamin SP (Sandoz), Turkish Red Oil …

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