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Flow Chart of CVC Fabric Dyeing Process

Flow Chart of CVC Fabric Dyeing Process
Rana Sohel
Executive Engineer
Sunman Textile Mills Ltd. Chittagong
Cell: +8801912-420118
Email: rsohel07tex@gmail.com



CVC Fabric Dyeing:
In this process, at first the polyester part is dyeing at high temperature e.g. 130-135oC. After completing the polyester part dyeing then cotton part is dyeing by using requires chemicals and control require temperature.
Flow Chart of CVC Fabric Dyeing Process
The sequence of dyeing process with disperse dyes is as follows (Polyester Part + Cotton part Dyeing) by using one bath dyeing method:

Take water in the machine bath at required level.

Then add Detergent, Sequestering agent, Anti-creasing agent, Dispersing agent. --Circulate the fabric for 5 mins at 50oC.

Add acetic acid and circulate for 5 mins at 50oC.

Add Glauber’s salt and circulate for 5 mins at 50oC.

Check PH of the dye bath.

Add Polyester dye solution by linear dosing and circulate the fabrics for 10 mins at 50oC.

Add Cotton dye solution by linear dosing and circulate the fabrics for 10 mins at 50oC.

Circulate the fabric and raise the temperature at 130oC.

Continuing Circulate the fabric for 30 – 40 mins at a constant temperature at 130oC.

Circulate the fabric and decrease the temperature at 70oC.

Then Check the shade of Polyester Part with approved shade.

Circulate the fabric and raise the temperature at 82oC.

Continuing Circulate the fabric for 30 – 40 mins at a constant temperature at 82oC.

Add Soda ash by Curve dosing and continue circulating the fabric for 30 – 40 mins at 82oC.

Circulate the fabric and decrease the temperature at 70oC.

Then Check the shade of Cotton Part with approved shade.

Rinse and Drain.

Add acetic acid and circulate for 10 mins at 60oC.

Drain.

Add Soaping Chemical and circulate for 10 mins at 95oC.

Drain.

Circulate the fabric for 10 mins at 70oC.

Drain.

Unload.