Flow Chart of CVC Fabric Dyeing Process

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

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.

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 130 oC.

Circulate the fabric and decrease the temperature to 70 oC.

Then Check the shade of the Polyester Part with the approved shade.

Circulate the fabric and raise the temperature at 82 oC.

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

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

Circulate the fabric and decrease the temperature to 70 oC.

Then Check the shade of Cotton Part with the approved shade.

Rinse and Drain.

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

Drain.

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

Drain.

Circulate the fabric for 10 mins at 70oC.

Drain.

Unload.

Author of this Aricle:
Rana Sohel 
Executive Engineer 
Sunman Textile Mills Ltd. Chittagong 
Cell: +8801912-420118 
Email: [email protected]

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