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, a blend of cotton and polyester 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
- Taken 0.5 to 1 gm of blended sample and weighed it, then put it in a flask.
- Added 70% sulphuric acid. (M:L = 1:200)
- Stirred this solution mechanically for 30 minutes.
- Filtered the solution, whatever is left is polyester. The cotton part is dissolved by this process.
- Washed the left fabric with water.
- Neutralized it with a dilute solution of ammonia.
- Dried the fabric and after cooling weighed the fabric again.
- Calculated 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. At 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.