What is wet processing technology?
Wet-Processing is the processing stage at which textile substrate is treated with colourants and/or chemicals, collectively referred to as inputs in GOTS terminology. This includes sizing, desizing, pre-treatment, dyeing, printing (including digital printing), finishing, laundry, etc.
What are the different types of wet processing?
The wet process consists of singeing, desizing, kiering, bleaching, mercerizing, and dyeing.
Which chemicals are used in wet processing?
Major Chemicals Used in Wet Processing: Acids, bases, salts, surfactants, oxidizing agents and reducing agents are the major chemicals those are widely used in wet processing industry.
Why wet processing is important?
Textile wet processing, which includes scouring, bleaching, coloration, and finishing in an aqueous medium, is of crucial importance for improving the performance and serviceability of textile materials. A massive amount of water, energy, and chemicals are required in the wet processing of textiles.
Why is singeing necessary?
Singeing of fabric is done in order to obtain a clean fabric surface which allows the structure of the fabric to be clearly seen. Fabrics, which have been signed, soil-less easily than un-singed fabrics. The risk of pilling, especially with synthetics and their blends, is reduced in the case of singed fabrics.
Why is it called the wet process?
The processes of this stream are involved or carried out in an aqueous stage. Hence, it is called a wet process which usually covers pre-treatment, dyeing, printing, and finishing.
What is the difference between dyeing and printing?
Dyeing is the process by which textile material is changed physically and chemically and finally looks like colored materials. Printing means partial or localized dyeing. It can be described as the controlled placing of defined areas of color onto a substrate.
Why Caustic soda is used in dyeing?
The fabric is usually mercerized under tension to reduce shrinkage, a common occurrence during the mercerizing process. Lastly, caustic soda is used in textile dyeing as most dyeing processes require a controlled pH level. Hence, caustic soda is added into the solution to maintain the pH levels during dyeing processes.
What is wetting agent in textile?
Wetting agents are basically surfactants that lower the surface tension of a liquid, allowing easier spreading, and lower the interfacial tension between two liquids. Each wetting agent molecule has a hydrophilic (water-loving) head a hydrophobic (water-hating) tail.
Which type of flame is used in gas singeing?
Basically Singeing process is done by continuous burning and passing fabric over the flame, where the flame is produced by a combination of air and gas….Gas Singeing Machine.
|Plate singeing||Roller singeing||Gas singeing|
|The metal plate is used.||The metal roller is used.||The gas flame is used.|
Which singeing is better & why?
The projecting/floating fibers burn better in gas singeing than in plate or cylinder singeing. Uniform singeing can be done by gas singeing m/c, which is not possible in plate or cylinder singeing m/c. The smoothness and brightness of the fabric is higher in gas singeing than in plate or cylinder singeing.
What is wet process in semiconductor?
Semiconductor wet process equipment is used to form silicon ingots that are sliced into thin wafers. To create additional layers, semiconductor manufacturers use spin coating, a process that applies a substrate to a surface. When the surface is spun, the substrate is distributed via centrifugal force.