Scouring of different fibres
(1) Cotton & coloured cotton goods
(2) Natural polyamide or protein fibres (silk & wool)
(i) Scouring of wool (ii) Degumming of silk
(3) Manmade fibres
(4) Polyester cotton blends
Semi-continuous process for polyester cotton blended fabric
Scouring recipe for polyester-cotton blends (P/C)
Sr.No | Recipe | |
1 | Soda ash | 0.5 to 1 % |
2 | Detergent | 0.2 to 0.5 % |
3 | Temperature | 100°C |
4 | Time | 60 to 90 minutes |
Alternate recipe for polyester-cotton blends (P/C)
Sr No | Recipe | |
1 | Sodium hydroxide | 0.2 to 0.5 % |
2 | Detergent | 0.2 to 0.5 % |
3 | Temperature | 75 °C |
4 | Time | 60 to 90 minutes |
Pad-roll machine
Two saturators are used in this machine, and the fabric is given a double pad to ensure good liquor pick-up.
The fabric is given sufficient time for saturators for impregnation with scouring liquor. The scouring bath consists of caustic soda or Sodium carbonate and detergent at 80 to 90°C.
There is a padding mangle at the end of each impregnation to squeeze out extra liquor.
The padded fabric is then heated to 95°C in a pre-heater and batched up in a movable steaming chamber. When the batch is finished, the chamber is removed and connected to the Steam line.
The cloth roll is steamed at 90 to 95°C for 90 to 120 minutes, rotating slowly to ensure uniform dispersion of the scouring liquor in the roll.
The scoured fabric is next thoroughly washed in an open soaper to eliminate the degradation products created by the scouring procedure.
The saturators consist of the following recipe-
Sr No | Ingredients | Percentage |
1 | Sodium carbonate | 1.5 to 2.5 % |
2 | Detergent | 0.3 to 0.5 % |
 |
| Pad-roll (semicontinuous process) |
Parameters -
Temperature - 90 to 95 °C, for 90 to 120 minutes time
Process sequence -
Padding (Double) ➝ Preheating ➝ Batching ➝ Steaming ➝ Washing.
Continuous process for polyester-cotton blends
One of the major advantages of the continuous process is the increased production in a textile chemical process House.
In the case of polyester-cotton blends, the fabric is scoured continuously in a J-box or Vaporlok type machine.
Two machines are continuously processing the fabric-
(A) J-Box
(B) Vapor lock unit
J-Box is for combined Scouring as well as bleaching process so, it will be explained during the combined Bleaching process however, Vaporlok process is used for continuous Scouring of the polyester cotton blended fabric.
Questions -
- What is the process of scouring for polyester cotton blend fabric?
- What is the function and work of padroll machine for scouring?
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. from https://textilelearner.net/flow-chart-of-textile-wet-processing/
Hasin, S. (2020, October 11). 7 differences between scouring and souring. Textile Property. https://www.textileproperty.com/difference-between-scouring-and-souring/
Mustaqim-Ul-Alam, A. (n.d.). Scouring. Textiles Scholars - The Home Of Textile Learners. from https://textilesscholars.blogspot.com/2019/07/scouring-types-of-scouring-process_9.html
Parmar, M. S. (n.d.). Textile Chemistry. Blogspot.com. from http://drmsparmar.blogspot.com/2014/12/souring-fabric-after-bleaching-contains.html
Souring process in the textile. (2021, October 11). Bdfabric.com; roni. https://bdfabric.com/souring-process-in-the-textile/
(N.d.). Textilelearner.net. from https://textilelearner.net/scouring-process-of-cotton-in-textile-industry/
Further reading,
Part 1 Introduction of scouring processing.
Part 2 Scouring processing actions
Part 3 Scouring processes methods
Part 4 Kiers in scouring processing
Part 5 Process flow of scouring and it's testing
Part 7 Scouring of Cotton & coloured cotton goods (1)
Part 8 Scouring of Natural polyamide or protein fibres (2)
Part 9 Scouring of Man-made fibres (3)
Part 10 Scouring for Polyester cotton blends (4)
Part 11 J-box and Vapor lock unit for continuous scouring processing
Part 12 Machines used for yarn scouring
Part 13 Jigger machine for scouring processing
Part 14 Winch Scouring Machine
Writer - Rushikesh Patil (Textile Engineer)
