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