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Lab dip & Dyeing Recipes items (Single and double bath dyeing of polyester/cotton blended fabric using disperse and reactive dye)

Single and double bath dyeing of polyester/cotton blended fabric using disperse and reactive dye 

Materials and methods

Material:
Polyester/cotton blended fabric was used for the experiments. The details are as below.
Polyester/cotton: 60/40
GSM- 129
GLM- 367.440
TC- 250
Construction- CVC PERCALE- 45CVCX60CVC/ 176X70-112”

RFD parameters of the fabric
1. Absorbency: 3 sec
2. Whiteness: 81.76
3. Tegawa Rating: 8
4. pH of fabric: 5.0
Dyes and chemicals

Dyes:
Reactive Dyes: (Manufactured by Colourtex Pvt. Ltd., India)
Corazol Yellow RFT, Corafix Rubine GDN, Corazol Navy RFT, Novacron Yellow CRG, Coractive T. blue H2GP, Novacron Yellow S3R, Novacron Rubby S3B, Novacron Blue CR, Novacron Yellow CRG, Novacron Yellow GL, Novacron Red C2BL and Novacron Blue CR,

Disperse Dyes: (Manufactured by Colourtex Pvt. Ltd., India)
Coralene Yellow XF, Coralene Rubine XF2G, Coralene Blue XF, Coralene Dark Blue XF, Coralene Red XF and Coralene Yellow BXF,

Chemicals and auxiliary
Sodium hydroxide, Sodium carbonate, Sodium sulphate (Gluaber’s salt), Sodium hydro Sulphite, Premasol AMK (Anti-migrating agent), Salson NF (Wetting agent), Dekol FBSN (Non-ionic soap, BASF) and Acetic acid

Machines and the Laboratory Instruments
1) Mathis padder – Manufacture: Werner Mathis AG, Switzerland
2) Rota dyer machine – Manufacture: R.B. Electronics and Engineering Pvt. Ltd., India
3) Mathis Pad steam range - Manufacture: Werner Mathis AG, Switzerland
4) Mathis dryer - Manufacture: Werner Mathis AG, Switzerland
5) Spectrophotometer – Manufacture: Data color, USA

Methods
Dyeing of polyester/cotton with single bath
In the laboratory, as per the dyeing recipe, the 100 ml of dye baths were prepared by adding the required amount of dye solution of disperse and reactive dyes, 2 % anti-migrating agent, 2 g/l wetting agent and acidic acid to adjust pH of 4-5. The fabric samples dyed was padded through dye bath at room temperature and then dried at 130oC. After drying the samples were thermo-fixed at temperature of 180-220oC for one min. Then the reactive dyeing was completed by adding 50 g/l glauber’s salt, 2 g/l caustic, 20 g/l soda ash and 2 g/l resist salt at temperature of 100oC. Finally samples were soaped with 2 g/l soap and then washed and neutralized.

Dyeing of polyester/cotton with double bath

Here dyeing of polyester and cotton was carried out in separate bath. As per the dyeing recipe, the 100 ml of dye baths were prepared by adding the required amount of disperse dye solution, 2 % anti-migrating agent, 2 g/l wetting agent and acidic acid to adjust pH of 4-5. The fabric samples to be dyed was padded through dye bath at room temperature and then dried at 130oC. After drying the samples were thermo-fixed at temperature of 180-220oC for one min. The reduction clearing was carried out with 2 g/l sodium hydrosulphite and 2 g/l sodium hydroxide at 70oC for 15-20 min. After reduction clearing, the samples were washed and neutralized. Then the reactive dyeing was carried out. The polyester dyed samples were padded through required amount of reactive dye, 50 g/l glauber’s salt, 2 g/l caustic, 20 g/l soda ash and 2 g/l resist salt at room temperature. After padding samples were covered with plastic paper and kept for fixation in pot of Rota dyeing machine at 100oC for 30 min. Finally samples were soaped with 2 g/l soap and then washed and neutralized. The following recipes were selected for the single and double bath dyeing.

Dyeing recipes:
Dyeing recipes: Recipe
Disperse Dye
Reactive dye
Recipe A
Coralene Yellow XF 7.5 g/l
Coralene Rubine XF2G 7.1 g/l
Coralene Blue XF 8.1 g/l
Corazol Yellow RFT 13.6 g/l
Corafix Rubine GDN 3.6 g/l
Corazol Navy RFT 3.9 g/l
Recipe B
Coralene Yellow XF 1.5 g/l
Coralene Red XF 4.5 g/l
Coralene Blue XF 1.7 g/l
Novacron Yellow S3R 4.5 g/l
Novacron Rubby S3B 4.3 g/l
Novacron Blue CR 1.5 g/l
Recipe C
Coralene Yellow XF 0.9 g/l
Coralene Dark blue XF 1.0 g/l
Novacron Yellow CRG 1.6 g/l
Corazol Navy RFT 7.2 g/l
Coractive T. blue H2GP 1.3 g/l
Recipe D
Coralene Yellow XF 1.07 g/l
Coralene Yellow BXF 0.6 g/l
Coralene Blue XF 1.0 g/l
Novacron Yellow GL 3.9 g/l
Novacron Red C2BL 0.6 g/l
Novacron Blue CR 1.1 g/l


Dyeing parameters
Parameters
Single bath
Double bath
Padding
Trough temp- room temp. Mangle pressure- 3 bar
Speed of mangle- 3 mtr/min
Trough temp- room temp.
Mangle pressure- 3 bar
Speed of mangle- 3 mtr/min
Drying and curing
Drying temp- 130oC
Drying speed- 1 mtr/min
Curing temp- 220oC
Curing speed- 0.7 mtr/min
Drying temp- 130oC
Drying speed- 1 mtr/min
Curing temp- 220oC
Curing speed- 0.7 mtr/min
Development of reactive dye in cotton portion
Trough temp- room temp
Mangle pressure- 2.0 bar
Speed of machine- 2 mtr/min
Steamer temp- 101oC-102oC
Dwell time- 1 min, 30 sec.
This process is not carried out for double bath method
Reduction clearing
This process is not carried out in single bath method
Time- 15-20 min
Temp- 70oC
Cotton portion dyeing
This process is not carried out in single bath method
Trough temp- room temp. Mangle pressure- 3 bar
Speed of mangle- 3 mtr/min
Washing
Washer temp-
1st washer- cold wash,
2nd washer- hot wash, 95oC,
3rd washer- soaping with 2 g/l Dekol FBSN, 5oC,
4th washer- soaping with 2g/l Dekol FBSN, 5oC,
5th washer- hot wash, 95oC,
6th washer- neutralization with 0.5 g/l acidic acid
Washer temp-
1st washer- cold wash,
2nd washer- hot wash, 95oC,
3rd washer- soaping with 2 g/l Dekol FBSN, 95oC,
4th washer- soaping with 2 g/l Dekol FBSN, 95oC,
5th washer- hot wash, 95oC,
6th washer- neutralization with 0.5 g/l acidic acid

Results and discussion

Polyester-cotton blended fabrics were dyed using single bath and double bath techniques. After dyeing the dyed samples were evaluated for fastness properties


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