CVC Fabric Dyeing Process|Step By Step Details

CVC means the chief Value cotton. Here CVC fabric dyeing process means the dyeing process of the fabric in which the cotton portion is higher than the polyester. So that the fabric has two types of fabric. One is Cotton and the other is polyester. Here need dyeing two-parts. Tow part of the fabric needs two types of dyestuff.

Cotton Part= Need Reactive dyestuff

Polyester Part= Need Disparse dyestuff

Now the question is which part will dye first in the CVC fabric?

From my experience, I can say that it’s better to dye the polyester part first. Because polyester part needs 130⁰C to 135⁰C Cotton part needs 60 ⁰C to 80 ⁰C.

Cotton part:

Need Temperature: 60 ⁰C to 80 ⁰C

Polyester Part:

Need temperature: 130⁰C to 135⁰C

Because polyester part needs 130⁰C to 135⁰C Cotton part need 60⁰C to 80 ⁰C normally. So that if I dye the cotton first then cotton can be faded during 130 ⁰C polyester dyeing.

One more thing, the polyester part dye needs reduction cleaning which will remove the reactive dyestuff.

cvc-fabric-dyeing-process

CVC Fabric Dyeing Process flow chat

Load fabric

Polyester Part dyeing

Reduction Cleaning

Scouring & Bleaching

Enzyme

Cotton Part Dyeing

Souping

Softening

Unload

Details CVC Fabric Dyeing Process step by step

Both the cotton and polyester part fabric dyeing process is stated below step by step. All the color dyeing processes are different from each other. One special color dyeing process is given below. This given process will be better for royal/ turquoise type color. Let’s start…

Load the fabric

POLYESTER PART START

Oxalic acid+Detergent Inject = For remove impurities and neutralization

Run time 10min

Drain and wash for 5min

Acetic acid inject= For Control PH: 4.2 to 4.5

Rice the temperature at 80⁰C

Disperse dye stuff dossing 30min = For polyester part dying

Rise the temperature80 ⁰C to 95⁰C Grade 1⁰C = Grade for better penetration

Then rise temperature 95 ⁰C to 135 ⁰C Grade: 0.5 ⁰C

Run for 45min

Cooling at 135 ⁰C to 95 ⁰C grade: 1 ⁰C

Then 95 ⁰C to 79 ⁰C directly.

Check the sample = To achieve the required shade

If the shade ok then drain the dye bath

Normal hot at 80 ⁰C

Run for 10min

Wash for 10min

Caustic soda dossing 8min at temperature 50 ⁰C

Run for 5min

Rise the temperature at 80 ⁰C

Inject hydrose = for removing the loose disperse dyes

Rise the temperature at 90 ⁰C

Run for 10min

Cooling at 80 ⁰C and drain

Normal not at 90 ⁰C for 10min

Wash for 10min and drain

COTTON PART START

Detergent+Anticreasing agent+Oil remover+Peroxide stabilizer inject

Caustic soda dossing 10min

Run time 5min

Rise temperature at 70 ⁰C

Inject the Hydrogen peroxide

Rise the temperature 100 ⁰C

Run time 60min

Cooling at 78 ⁰C

Shade check = Check the whiteness and absorbency

If ok drain

Normal hot at 80 ⁰C

Run time 10 min

Inject Acetic acid = For neutralization of Caustic

Run time 5min

Drain and wash for 5min

Peroxide killer Inject run for 5min

Drain and wash 10min

Rise temperature 55 ⁰C

Inject acetic acid = to control ph 4.5 for enzyme

Inject enzyme

Run time 60min

Shade check = For check hairiness of the fabric

If ok then drain

Wash for 10min

Leveling pH check= PH 5.5 – 6;

Levelling Dosing 600c 5 minute

Runtime 10 minute

Temperature 800c

Color Dosing 25 minute

Runtime 10 minute

1st Salt dosing 10 minutes (10%)

Runtime 5 minute

2nd Salt dosing 10 minutes (20%)

Runtime 5 minute

3rd Salt dosing 10 minutes (70%)

Runtime 10 minute

Temperature 900 C = For better dye migration

Runtime 20 minute

Colling 600 C

Salt Sample Check and Fabric Quality check = The evenness of dyes

If ok then

1st Soda dosing 20 minutes (10%)

Runtime 10 minute

2nd Soda dosing 20 minutes (20%)

Runtime 10 minute

3rd Soda dosing 25 minutes (70%)

Runtime 20 minute

Sample Check

If ok then drain or if not ok then run for more 10min and check again

If ok then drain (Rinse drain is better)

Normal, not 80 0c run 10min

Wash until clear the loose dyes (Not more than 20min)

Inject soaping agent

Rise 90 0c and run 10min

Check shade if the ok drain

Wash clear

Fixing agent dos 5min

Runtime 10min

Wash clear

Softener dossing 7min

Check softness if ok

Unload and deliver to finishing

Conclusion:

CVC Fabric Dyeing Process is two different processes in one combination. This is so lengthy process. It can be short according to the behavior of dyes and chemicals. I think it is the details process. I think it will clear all the questions in your mind.

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