Scouring Bleaching Process and Chemicals in the Textile Industry

The scouring & bleaching process and chemicals in the fabrics are important to understand. Scouring is an important factor in wet processing (dyeing). Different types of chemicals and their different dosing are used according to the nature of the different fibers. Scouring helps get rid of dirt and natural oils on the fabric, which makes it easier for the dye to soak in and last longer. It also helps to prepare the fabric for subsequent chemical treatments and finishing processes.

Bleaching is an important step in the textile processing industry and is used to achieve a uniform and clean base color for dyeing or printing. The bleaching process can vary depending on the type of fiber or fabric being used, as different fibers have different levels of sensitivity to bleaching chemicals. The right choice of bleaching process and chemicals can help achieve the desired results without compromising the integrity of the fabric.

We are discussing the scouring and bleaching process in textiles according to fiber or fabric type. Here we share a table of different types of fiver and their scouring process.

Table of Scouring and Bleaching Process Chemicals:

F/ TYPE	COLOUR	Scouring and Bleaching process Chemical	Scouring and Bleaching Process
100% COTTON	Light+ medium	Detergent=0.8; Caustic= 2.0; H2O2= 2.5	98×60 for Lt color ;   98×45 for Medium to Dark color ;
100% COTTON	Light+ medium	LAD Conc =0.6; Toxal = 1.0; Caustic = 1.5; H2O2= 2.0	80×30
100% COTTON	Dark	STN= 1.0;        TCB= 1.6	80×20 with enzyme, 80×40 without enzyme for STN; 90×20 with enzyme, 90×40 without enzyme for TCB
Recycle ctn / ROTOR	Light+ medium	LAD Conc =0.6; Soda = 3.0; H2O2 =2.0   /     MRG =0.8; Soda= 4.0; H2O2= 2.5	98×60 for Lt color ;   98×45 for Medium to Dark color
Recycle ctn / ROTOR	Dark	STN= 1.0;        TCB= 1.6	80×40  for STN;  90×40  for TCB
For overscouring	Special light	LAD Conc =0.6; Caustic = 2.0; H2O2 =2.5     / MRG =0.8; Caustic= 2.5; H2O2= 3.0          /     Toxal = 1.0; Caustic = 2.0; H2O2= 2.5	98×60 ; 80×30 for toxal
For overscouring	Special light	LAD Conc =0.6; Toxal = 1.0; Caustic = 2.0; H2O2= 2.5	80×30
100% VISCOSE + TENCEL + MODAL	Light+ medium	LAD Conc =0.6; Soda = 3.0; H2O2 =2.0     /    MRG =0.8; Soda= 4.0; H2O2= 2.5	80×30
100% VISCOSE + TENCEL + MODAL	Dark	STN= 1.0;	80×40
CTN/ MODAL	Light+ medium	LAD Conc =0.6; Soda = 3.0; H2O2 =2.0     /    MRG =0.8; Soda= 4.0; H2O2= 2.5	98×60 for Lt color ;   98×45 for Medium to Dark color
CTN/ MODAL	Dark	STN= 1.0; TCB = 1.6	80×20 with enzyme, 80×40 without enzyme for STN; 90×20 with enzyme, 90×40 without enzyme for TCB
ECO FRESH	Any	MRG =0.8; Soda= 1.0; H2O2= 2.0; STN= 0.75	90×30
CTN/POLY	Dark	TCB + TCW
CTN/POLY	Light+ medium	LAD Conc =0.6; Caustic = 1.5; H2O2 =2.0   / MRG =0.8; Caustic= 2.0; H2O2= 2.5	98×60 for Lt color ;   98×45 for Medium to Dark color

Here TCB= low-temperature scouring agent.

Lodcon=Powerfull detergent.

TCW= High functional Soaping Agent.

STN= Bio Scouring agent.

MRG= Detergent.

Caustic Soda= Scouring agent.

H2O2= Bleaching Agent.

Conclusion:

In the textile industry, scouring and bleaching processes are critical for preparing fabric for dyeing and printing. The choice of chemicals and the dosing of these chemicals depend on the type of fiber being processed. The right combination of scouring and bleaching agents can remove dirt, natural oils, and stains from the fabric, resulting in a uniform base color. The table provided shows the different chemicals and processes required for the scouring and bleaching of various fiber types.

Research link:

• Textile bleaching
• Scouring (textiles)

You may read some other articles

• 100% Cotton Fabric Turquise Color Dyeing Standard Process and Recipe
• 100% Viscose Single Jersey Fabric Dyeing Standard Recipe

FOR MORE INFO VISIT KNIT DYEING DETAILS

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