The binder is charged with adding hand to the fabric, but the increase in hand is not only a function of the binder, it is a combination of the thickener used to make the print paste, together with the binder. The thickener is bound to the fabric with the pigment and binder. It is important to look at both the thickener and the binder and their combined effect on hand. The second step in preparation of the printing paste is the addition of the binder system and its components to the stock thickening.
The components of this portion of the stock thickening are: Binder System
• Binder
• Crosslinker
• Softener
In many cases, the print system is more efficiently compounded if the binder is added to the water before the thickener concentrate is added. This would be the preferred method. Crosslinking agents and softeners are added after thickening the system. Other auxiliaries, if needed, are also added after thickening has occurred. Auxiliaries used in printing are: • Crosslinking agent, which is a resin, usually a melamine compound, that links by chemical reaction the binder polymer to itself to increase its durability and enhance fastness.
These products, while improving wet fastness, can also increase hand. • Softener compounds, usually emulsified oils or silicone, are products that increase the flexible nature of the binder even after crosslinking so that the finished film is “softer”. These products may also have a detrimental effect on fastness when used in excess.
• Antiwicking compounds are products that increase the solids content of the print paste and help prevent the wicking or flushing that accompanies printing on fabrics containing resin and catalyst. By nature, these products can increase the hand of the binder if used improperly, but do not normally affect fastness.
• Emulsifiers or surfactants are in addition to the surfactants present in both pigments and binders and are intended to assist in printing and running properties. These compounds are also used to achieve smoother and cleaner prints, but can interfere with binder fastness. The last step in compounding the color for printing is the formulation of the print paste. Since the stock paste contains both thickener and binder systems, only the pigment colorant needs to be added. The binder concentration in the stock thickener is usually adequate for most pigment formulations, however, there may be instances when additional binder must be added. One example would be when printing a black motif with black pigments, which always requires additional binder for fastness. Another scenario would be when the formula calls for a pigment concentration that is higher than the amount of binder in the stock paste can accommodate.
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MANUFACTURING PROCESS OF TEXTILE CHEMICALS is not very complicated. For the production, there is need usable and tried a formulation, raw materials and mixing tank. For raw materials to be used, quantities to be used and ingredients usage rankings, you should look into this formulation. Therefore, formulation and productıon methods of TEXTILE CHEMICALS are important. If you have not a good formulation, you cannot make healthy and efficient production of any textile chemicals.
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