Experiment
Name: Dyeing of 100% polyester woven fabric with
Disperse dye (High Temperature Method).
Theory: The term “disperse dye”
have been applied to the organic colouring substances which are free from
ionizing groups, are of low water solubility and are suitable for dyeing
hydrophobic fibres. Disperse dyes have substantivity for one or more
hydrophobic fibres e.g. cellulose acetate, nylon, polyester, acrylic and other
synthetic fibres. The negative charge on the surface of hydrophobic fibres like
polyester cannot be reduced by any means, so non-ionic dyes like disperse dyes
are used which are not influenced by that surface charge.
Objective:
1.
To learn about dyeing process
of polyester fabric by disperse dye.
2.
To dye polyester fabric by
disperse dye.
Nature
of sample:
Pre-treated 100% polyester woven fabric.
Apparatus
required:
1.Beakers
2.Glass Rod.
3.Pipette.
4. Measuring Cylinder.
5. Digital Balance.
6. Tri-pod stand.
7. Gas Burner.
8. Thermometer.
9. Pot.
Process
Sequence:
- Collection of sample
- Set water level
- Add Acetic acid solution
- check pH
- Add dispersing agent solution
- Add disperse dye solution
- Add fabric sample
- Raise temperature to 90deg C
- Run time for 20 minutes
- Bath Drop
- Rinsing
Table1:
Dyeing Recipe
|
SL
|
Process Parameter
|
Unit
|
Dossing
|
Stock soln:
|
|
01
|
Disperse Dye
|
%
|
1
|
1%
|
|
02
|
Dispersing Agent
|
g/L
|
1
|
1%
|
|
03
|
Aceic Acid
|
ml
|
0.5
|
-
|
|
04
|
M : L
|
---
|
1:30
|
-
|
|
05
|
Fabric Weight
|
gm
|
5
|
-
|
|
06
|
Temperature
|
deg C
|
130
|
-
|
|
07
|
Time
|
Min
|
20
|
-
|
Calculation:
Total Liquor = Fabric weight X L [M:L = 01:30]
=
5 X 30
=
150mL
Dye 1%
= (Fabric weight X x%) / stock solution%
=
(5X1%) / 1%
=5mL
Dispersing Agent = (Total liquor X 'x'g/L)
/ (stock solution% X 1000)
=
(150 X 1) / 1% X 1000
=
15mL
Acetic Acid : 1ml
Initial Water = total liquor - (chemical 1
+ chemical 2 + chemical 3 ...)
=
150- (5+15+1) mL
=
150 -21 mL
=
129mL
Process Curve:
Sample Attachment & Observation:
Conclusion:
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