Wet Processing

1. WELCOME TO
OUR
PRESENTATION
Soikot Saha 172-23-5127
Md.Emamuzzaman Khan 172-23-5102

2. Jet Dyeing Machines
TOPIC Name :

3. INTRODUCTION
A machine used for dyeing of fabric in rope from Jet dyeing machines came into
existence with a purpose to minimize
or eliminate the drawbacks of earlier
machines like winch , jigger and beam
dyeing units.
Mainly used for dyeing of polyester
using disperse dye.
It is similar to winch dyeing and fabric
is processed in continuous loop.
The technique is especially useful for
delicate polyester fabrics but
depending on the machine almost any
weight, structure, or fabric type can be
used.

4. OBJECTS
1.To know the dyeing procedures
2.To know about the mechanism
of the machine
3.To know about the maintenance
of the machine

5. Advantages
1. Dyeing time is short compare to beam dyeing
2.prodction is high compare to beam dyeing
machine.
3.Low consumption of water
4.Short dyeing time
5.can be easily operated at high temperatures and
pressure.
6.Comparatively low liquor ratios, typically ranges
between 1:4 and 1:2
7.Fabrics are handled carefully and gently.

6. Disadvantages
1.dyed in rope form so there is a risk of
entanglement
2.Equipment and maintenance costs are high
3.some fabric may be abraded in the process
4.Chance for crease formation
5.foaming can be a problem

7. MAIN PARTS
• Autoclave
• Drain valve
• Winch roller
• Dyeing tank
• Reserve Tank
• Heat Exchanger Steam pipe
• Winch roller
• Nozzle

8. Types of Jet Dyeing Machines
1.Overflow Dyeing Machine
2.Soft Flow Dyeing Machine
3.Airflow Dyeing Machine

10. DYEING PROCESS :In the Jet dyeing machine the
reel is completely eliminated. A closed tubular system
exists where the fabric is placed. For transporting the
fabric through the tube a jet of dye liquor is supplied
through a venture. The Jet creates turbulence. This
helps in dye penetration along with preventing the
fabric from touching the walls of the tube. As the
fabric is often exposed to comparatively higher
concentrations of liquor within the transport tube, so
little dye bath is needed in the bottom of the vessel.
This is just enough for the smooth movement from
rear to front. Aqueous jet dyeing machines generally
employs a driven winch reel along with a jet nozzle.

11. Chemicals added :
Acids
Buffers
Sequestering Agent
Anticreasing
Levelling agent
Defoamers