Dyeing Auxiliaries

Dyeing auxiliaries are fine chemical products in the textile printing and dyeing industry applications. Dyeing agent is an important type of textile printing and dyeing auxiliaries, generally according to the classification of dyes, to name different types of dyeing agents. Dyeing auxiliaries is mainly included auxiliary for cotton, auxiliaries for polyester, auxiliaries for wool and nylon, auxiliaries for acrylic etc.

To be specific, dyeing agents include leveling agent, fixing agent, dispersing agent, fluorescent whitening agent and softener. Textile dyeing auxiliaries are essential to enhance the value-added and upgrading of textiles, they can also make the textile more contemporary, functional, and high-grade. To some extend, dyeing auxiliaries quality affects directly the fabric quality.

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Products Key Functions
Dalewash-7SK A very effective dispersing and washing agent for reactive dyed fabric.
Dalewash-KN330 A highly concentrated effective washing agent specialy designed for turquoise and blue shades.
Dalewash-K400 Conc A very effective collidal based dispersing agent for VAT and reactive dyed fabric
Dalewash-KL20 A cost effective collidal based dispersing and washing agent for reactive dyeing.
Daledye-ANC Conc High performance, polymeric dye bath lubricant.
Daledye-E2D Conc Concentrated and strong leveling/dispersing agent for reactive dyes
Daledye PNK New Leveling and dispersing agent for polyester and blends.
Daledye-PMN Low cost, highly efficient cationising agent for pigment dyeing.
Dalefix-FEF Conc A low foam dyeing assistant for polyester/cellulosic blends and nylon
Dalefix-FEF Highly concentrated formaldehyde free fixing agent for reactive dyed cellulosic fabric.
Dalefix-RCN Cost effective formaldehyde free fixing agent for effective colour fastness.
Dalefix-FXN Low formaldehyde fixing agent for reactive dyes.
Dalefix-BSN Cost effective, low formaldehyde fixing agent for reactive dyes.
Daledye-CPD Strong, low formaldehyde fixing agent for reactive dyes.

Dyeing auxiliaries mean a chemical or formulated chemical product which enables a processing operation in preparation, dyeing, printing or finishing to be carried out more effectively, or which is essential if a given effect is to be obtained. Main functions of dyeing auxiliaries to prepare the substrate for coloration, to stabilize the application medium, to increase the fastness properties of dyeing, to modify the substrates etc. In this article I will give a list of dyeing auxiliaries and explain some important auxiliaries function in dyeing.

Lubricant

Wet processing and dye-bath lubricants are used in any operation in which rope marks, creases, crows feet buffing, abrasion can occur on textiles. In low liquor ratios, full-loaded winches and jets when heavy materials re processed, fiber lubricant is essential. The basic requirement is that is it should from a thin uniform protective coating around the fiber to lower the surface friction and flexural rigidity, thus minimizing the formation of durable creases during high temperature processing. The most suitable lubricant should have the properties so that it helps to emulsify, it does not undergo phase separation with extreme changes in pH and temperature, e.g. it is stable in high temperature and over a wide range of pH; and it should have excellent compatibility with all the chemicals in treatment bath, Suitable products are relatively hydrophobic surfactants, many of which also contain a proportion of solubilized or emulsified oil or wax.

Dispersing Agent

Unleveled dyeing problems can be of two categories: Gross unlevelness hroughout the material or localized unlevelness e..g. barriness, skitteriness. There are two fundamental mechanisms that can contribute to a dyeing.
Control of the exhaustion dye so that it is taken up evenly.
Migration of dye after initially unleveled absorption on the fibre.
Non-ionic agent usually from water soluble complexes with the dye, some degree of solubilization being involved.

Leveling Agent

Ionic agent are primarily dye-of fibre-substantive ; in the former case they tend to form complexes with the dye and there is competition between the leveling agent and the fibre for the dye, while in the latter case the competition is between the leveling agent and the dye for the fibre.

Fixing Agent

Properties of a good fixing agent includes good capability with cross linking agents without promoting yellowing effect; good leveling and migration properties, does not affect the shade, has good affinity for the fiber, stable to steaming and dry heat, and improved all round fastness properties of the fabric or yarn. Fixative is generally used after completing the dyeing or in printing paste.