Theory
Blend fabrics are those which have been made by blending two or more fibers together before they are spun into yarn. The dyeing process of blended fabric is different. CVC fabric is a blend of cotton and polyester that can be made of different percentages. By carbonizing process, we can determine the fiber percentage in the fabric. This process is done with 70% H2SO4 solution with water.
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Apparatus
- Fabric (blended)
- 70% solution of H2SO4
- Water
- Flask
- Dryer
- Balancer
Working Procedure
- Take 0.5 to 1 gm of blended fabric sample and weigh it, then put it in a flask.
- Add 70% sulphuric acid. (M:L = 1:200)
- Stir this solution mechanically for 30 minutes.
- Filter the solution, and whatever is left is polyester. The cotton part is dissolved by this process.
- Washed the left fabric with water.
- Neutralize it with a dilute solution of ammonia.
- Dry the fabric and after cooling, weigh the fabric again.
- Calculate the percentages of the fabric.
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| Dyed CVC Fabric © Textile Pad |
Calculation
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| Fiber Percentage Calculation ©Textile Pad |
= {(0.13 - 0.08) / 0.13} ✕ 100%
= 38.46%
So, the remaining polyester portion is 38.46%
So, the cotton portion is (100 - 38.46) = 61.54%
Conclusion
The carbonizing process is done in the CVC fabric dyeing process. First, the cotton part is dyed, then for checking shade% carbonizing is done. Thus we can measure the percentage of the fibers in a fabric by carbonizing.