Polyester/Cotton (P/C) Blends Fabric Dyeing: Recipe, Parameters, Flowchart and Dyeing Curve

Polyester/Cotton (P/C) Blends Fabric Dyeing: Recipe, Parameters, Flowchart and Dyeing Curve
Engr. Kazi Zakaria Ahmed
M.Sc. in Applied Chemistry & Chemical Technology (IU)
B.Sc. in Textile Engineering (DU)
Lecturer, Department of Garments & Textile Engineering
BCMC COLLEGE OF ENGINEERING & TECHNOLOGY
Jessore-7400, Bangladesh
E-mail: iamzakdude@gmail.com



RECIPE AT DIFFERENT STAGES IN DYEING COTTON FABRIC:
PRETREATMENT
Ingredient
Quantity
Wetting agent (Sun Mori CK-1)
0.5 g/l
Anti creasing agent (Texport D – 600)
1.3 g/l
Sequestering agent (Sirrix-SQ)
0.5 g/l
Caustic
3 g/l
Stabilizer (Neorate PH-100 )
1 g/l
Hydrogen per oxide (H2O2)
3.5 g/l
Peroxide killer(Crocks-N)
1 g/l
Neutralization
Acetic acid
1 g/l
Enzyme treatment
Acetic acid
0.3 g/l
Bio –polish EC
1 g/l
Dyeing
Acetic acid for leveling agent
0.3 g/l
Levelling agent (Neocrystal EDX/200B)
1 g/l
Anti creasing agent (Texport D – 600)
1.5 g/l
Dyes

Salt
40% owf
Soda
15% owf
After Treament
Fixing agent (Neofix ECO/Cibafix FRD)
0.5 g/l
Soaping agent(Lipotol PS-60)
0.8 g/l
Acetic acid
1 g/l
SOFTENING
Acetic acid
0.2 g/l
Softener( Perrostol CWS)
1 g/l






























 
Table No-1: Recipe at different stages in cotton dyeing.

RECIPE FOR MACHINE WASH:

Ingredient
Amount
Detergent (Solax)
0.5 gm/L
Caustic
1 gm/L
Hydrous
2 gm/L
Table No- 2: Recipe for m/c wash.

Different parameters in DYEING:

A. pH
During peroxide bleaching & scouring
9-11
During enzyme treatment
4.5-5
Before addition of leveling agent
6-6.5
Before addition of color softener(Perrustol IMA-500)
6-6.5
Before addition of  white softener(Perrustol VNO-500)
4.5-5
Softener at stenter & de-watering
5.5-6
Silicon softener
5.5-6
10.5-12
4.5-5.5
B. Temperature
For cotton scouring
95-110˚C
For cotton cold wash
40-50˚C
For cotton hot wash
70-80˚C
For cotton acid wash
60-70˚C
For cotton dyeing
80˚C ( For hot brand)/60˚C(For cold brand)
C. Time
For scouring and bleaching
60-90 minutes
For reactive dyeing
60-90 minutes
For disperse dyeing
60-90 minutes
Table No-3: Different parameters of dyeing.

Process of Polyester/Cotton (p/C) Fabric dyeing:

  1. At first the Polyester Part dyeing same as Polyester Dyeing.
  2. Then the Cotton Part dyeing same as Cotton Dyeing.
Dyeing Procedure of polyester fabrics with Curve:

Required amount of water filled

Fabric was loaded and run for 10 min.

Drain

Required amount of water filled

CK-2 and oxalic acid was added for 5 min.

Run for 20 min. at 800C

Rinse for 15 min.

Drain

Required amount of water filled

Formic acid added for PH- controlled

Check PH at 4.5

Leveling agent (DIF) added for 10 min.

Temperature increase at 600C

Color/Dyes added for 15 min.

Run for 10 minutes

Temperature increases at 1300C for 30 min.

Run for 30 minutes

Cooling at 800C

Shade check

Rinsing for 15 min.

Drain

Required amount of water filled

Hot wash at 800C

Shade check

Rinsing for 15 min.

Unloading


Reduction Cleaning-

Caustic Dosing (600C X 6 min)

Raising Temp at 1300C

Hydrose injection
(Run time- 10 min at 800C)

Normal wash

Drain


Figure-1: Dyeing Curve of Polyester.
Cotton Dyeing Steps with Curve:

Required amount of water was taken into the machine

The fabric was loaded and run for 5-10 minutes in normal temperature

CK-2,D-600/C,SQ-12UD and PH-100 (Scouring Chemicals) were added at a time for 5 minutes

Caustic was added at normal temperature for 5 minutes

Temperature increased at 600C

Hydrogen per Oxide(H2O2)was added for 5 minutes

Temperature increased at 950C and continue for 1 hrs

Sample check

Cold wash at 400C for 5-10 minutes

Hot wash at 950C for 5-10 minutes

Required amount of water was loaded

Croak-N was added

Acetic acid was added

Temperature increased at 800C for 15-20 minutes

Cold wash at 400C and drain

Water filled and Acetic acid was added

PH check at 4.5

Temperature increased at 550C

Enzyme (Bio-EC) was added and run for 1hrs at 550C

Shade check

Cold wash at 400C and drain

Water filled/Required amount of water was taken

Temperature increased at 95-990C for 5-10 minutes

Cold wash at 400C and drain

Acetic acid was added

PH check at 4.5

EDX/200B and C/D-600 were added at a time

Salt dosing

Color dosing for 30 min

Run for 10 min

Soda dosing for 40 min

Run for 7 min

Temperature increase at 600C for 5 min

Run for 10 min

Shade check (OK)

Rinsing

Water was filled at required amount

PS-60 was added

Temperature increase at 800C for 10 min

Hot wash at 900C for 20 min and shade check in this time (OK)

Rinsing

Water was filled at required amount

Acetic acid was added for neutralization for 10 min

Shade check (ok)

ECO/FRD was added for 10 min

Rinsing

Water was filled at required amount

PH check at 6.5

(C.W.S) softener was added

Final shades check and run for 20 min

Unload the dyed fabric

Figure-2: Scouring & Bleaching Curve.
Figure-3: Enzyme Treatment Curve.
Figure-4: Dyeing Curve of Cotton.

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