CVC Fabric Dyeing:
In this process, at first, the polyester part is dyeing at a high temperature e.g. 130-135oC. After completing the polyester part dyeing the cotton part is dyeing by using the required chemicals and control the required temperature. Here a flow chart of the CVC fabric dyeing process are as follow:
Flow Chart of CVC Fabric Dyeing Process
The sequence of the dyeing process with dispersed dyes is as follows (Polyester Part + Cotton part Dyeing) by using one bath dyeing method:
Take water in the machine bath at the required level.
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Then add Detergent, Sequestering agent, Anti-creasing agent, Dispersing agent. –Circulate the fabric for 5 mins at 50oC.
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Add acetic acid and circulate for 5 mins at 50oC.
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Add Glauber’s salt and circulate for 5 mins at 50oC.
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Check PH of the dye bath.
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Add Polyester dye solution by linear dosing and circulate the fabrics for 10 mins at 50oC.
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Add Cotton dye solution by linear dosing and circulate the fabrics for 10 mins at 50oC.
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Circulate the fabric and raise the temperature at 130oC.
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Continuing Circulate the fabric for 30 – 40 mins at a constant temperature at 130 oC.
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Circulate the fabric and decrease the temperature to 70 oC.
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Then Check the shade of the Polyester Part with the approved shade.
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Circulate the fabric and raise the temperature at 82 oC.
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Continuing Circulate the fabric for 30 – 40 mins at a constant temperature at 82 oC.
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Add Soda ash by Curve dosing and continue circulating the fabric for 30 – 40 mins at 82 oC.
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Circulate the fabric and decrease the temperature to 70 oC.
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Then Check the shade of Cotton Part with the approved shade.
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Rinse and Drain.
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Add acetic acid and circulate for 10 mins at 60 oC.
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Drain.
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Add Soaping Chemical and circulate for 10 mins at 95oC.
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Drain.
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Circulate the fabric for 10 mins at 70oC.
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Drain.
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Unload.
Author of this Aricle: Rana Sohel Executive Engineer Sunman Textile Mills Ltd. Chittagong Cell: +8801912-420118 Email: rsohel07tex@gmail.com