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Three chemical that carried out desizing

Chemicals that carried out desizing

Desizing is carried out by three chemical methods

1. Sodium Hypochlorite (NaOCL) 

2. Hydrogen peroxide (H2O2)

3. Sodium Bromite(BrNaO2)

Desizing machine layout
Desizing machine layout

Sodium Hypochlorite (NaOCL)


Padding solution- Sodium Hypochlorite - 2GPL


Process flow - 

Padding → Store(1 to 2 hr) → Hot & cold wash


Because Sodium Hypochlorite (NaOCL) is also used as a bleaching agent, this is also known as grey checking. 


For this method, the cloth is padded in a 2 GPL sodium hypochlorite solution and stored for 1 to 2 hours before being washed hot and cold.

Chemical concentration, temperature, and pH must all be kept constant.


Sodium Bromite (BrNaO2)

Padding solution- Sodium Bromite - (0.1 to 0.3 % )

Process flow - 

Padding → Store (1 hour) → Scoured → Hot wash or Cold wash

In this technique, a sodium bromite solution (0.1 to 0.3 per cent) is prepared, and the fabric is padded in it for about 1 hour at 60°C, following which the cloth is scoured or given a hot wash followed by a cold wash.


Hydrogen peroxide (H2O2)

Padding solution- H2O2 - 1% Stabilizer- 1% Soda ash- 0.5 %

Process flow- 

Padding → Batching → Kept in a closed vessel where it is steamed at 80-85°C.

Because this chemical is a powerful oxidizing and bleaching agent, it can complete both processes in one go.

Hydrogen peroxide serves as an oxidizer and desizing agent, while sodium silicate serves as a stabilizer. The only purpose of the ash is to modify the pH of the solution.

For the method, the fabric is padded in a solution containing the necessary chemicals in the proper proportions, then held in a closed vessel after batching and steamed at 80 to 85°C, where the chemicals are active and little scouring occurs.

Three chemical that carried out desizing
Three chemicals that carried out desizing

  • The oxidative desizing process combines the scouring and desizing processes to assist increase the fabric's basic whiteness. However, it is expensive and not ideal for light or delicate materials.

Questions -

  1. Which are the three chemicals that carried out desizing?
  2. What the role of Sodium Hypochlorite (NaOCL) in desizing process?
  3. What the role of Hydrogen peroxide (H2O2) in desizing process?
  4. What the role of Sodium Bromite(BrNaO2) in desizing process?

References

6. Wet processing. (2011, August 24). Textile Technology. https://textechdip.wordpress.com/contents/wet-processing/

Arputharaj, A., Raja, A. S. M., & Saxena, S. (2016). Developments in sustainable chemical processing of textiles. In Green Fashion (pp. 217–252). Springer Singapore.

Cenite, M. (2015). Google Books. In The SAGE Guide to Key Issues in Mass Media Ethics and Law (pp. 847–858). SAGE Publications, Inc.

Chemicals used in textile processing. (2013, January 10). OEcotextiles. https://oecotextiles.blog/2013/01/10/chemicals-used-in-textile-processing/

Chemistry of textile manufacturing. (2014, April 29). Worldofchemicals.com; Worldofchemicals. https://www.worldofchemicals.com/448/chemistry-articles/chemistry-of-textile-manufacturing.html

Get to know about chemical processing of textile materials. (2022, May 10). ECHEMI. https://www.echemi.com/cms/640314.html

Kan, C.-W. (2015). Plasma treatments for sustainable textile processing. In Sustainable Apparel (pp. 49–118). Elsevier.

Textile School. (2010, November 10). Fabric wet processing techniques. Textile School. https://www.textileschool.com/343/fabric-wet-processing-techniques/

textileblog. (2020, June 19). Stages of wet processing in textile industry. Textile Blog. https://www.textileblog.com/stages-of-wet-processing-in-textile-industry/

Vigo, T. L. (2014). Textile processing and properties: Preparation, dyeing, finishing and performance: Preparation, dyeing, finishing and performance (1st ed.). Elsevier Science & Technology. https://www.elsevier.com/books/textile-processing-and-properties/vigo/978-0-444-88224-0?country=GB&format=print&utm_source=google_ads&utm_medium=paid_search&utm_campaign=ukshopping&gclid=CjwKCAiAhqCdBhB0EiwAH8M_Gn3kr_d2paqVzccxckWobOsLcwl0cD_Mu6vA5I-eqFARiZwx32eUOxoC-LMQAvD_BwE&gclsrc=aw.ds

(N.d.). Textilelearner.net. https://textilelearner.net/flow-chart-of-textile-wet-processing/

Babu, S. (n.d.). Textile Adviser. Textileadvisor.com. from https://www.textileadvisor.com/2021/12/fabric-desizing-process-types-of.html

Desizing. (n.d.). Kemin. from https://www.garmonchemicals.com/en/textile-chemicals/garment-denim-finishing/enzyme-desizing

Landage, S. M. (2022). Biotechnological approaches in desizing of textile materials. In O. L. Shanmugasundaram (Ed.), Applications of Biotechnology for Sustainable Textile Production (pp. 47–73). Elsevier.

Madhu, C. (n.d.). TEXTILE CHEMROSE. Blogspot.com. from https://textilechemrose.blogspot.com/2015/12/desizing.html

Process of cotton Textile Materials desizing. (2013, September 12). Fibre2fashion.com; Fibre2Fashion. https://www.fibre2fashion.com/industry-article/7064/problems-in-desizing-cotton-textile-materials

Trivedi, Y. (2021, May 9). Textile Desizing process. Textilesphere.com. https://www.textilesphere.com/2021/05/desizing-textile.html


Further reading,


Writer - Rushikesh Patil (Textile Engineer)
(DKTE Society textile engineering college Ichalkaranji)
Email Id - rushikeshpatil23052002@gmail.com
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