• A process of continuous dyeing in which the fabric in open width is padded with dyestuff and is then steamed.

• Is an ideal machine for Reactive dyeing.

• Light, pale and medium shades can be dyed in this machine.

• Continuous roller steamer is used for diffusion of reactive, vat, sulphur and direct dyes into cellulosic fibers in an atmosphere of heat and moisture that is created by saturated steam injected into the steamer.

1. It can be used as a pad batch for reactive dyeing in which batch is left for 12-18 hours for the completion of the reaction. For time saving the fabric passes through the steamer for 1 minute and the reaction is completed.

2. It can also be used for reduction clearance (RC) in which we treat PC fabric with caustic and sod. Hydrosulphide to remove the disperse dye from cotton.

3. Stripping of the fabric can also be done on this machine that is, colour can be removed completely by adding higher amount of caustic and sod.hydrosulphide.

4. It can be used for the development of Vat dyes.5. The dyed fabric can be washed in this machine.

• Inlet Section.

• Padding Section.

• Steamer.

• Washer.

• Dryers.

• Outlet Section.

Inlet consists on following parts.

1.Plaiter/batcher

2.Tensioner rollers

3.Free guide roller

4.Stationary rollers.

• Steamer Temperature            102-105ºC

• Fabric’s dwell time                  1minute.

• Roof temperature                    107’C-109’C

• Fabric capacity                       75meter fabric

• Water lock                              1 (at the end)

The functions of the water lock:

• To stable steam to come out from the steamer.• To avoid thermal shocks and also • To avoid dyes to be diluted its temperature kept about 40-

45C

The temp here is 40-45C and it serves the following purposes:1 to cool the fabric2 Remove excess dye from surface.3 It condenses the steam that comes along the fabric

The chambers are used for number of process a/c to the requirement of dyes by showering of different type of chemicals.

Light and hard soaping. Washing. RC. Vat develop. Neutralizing.

There are 9 washing tanks. Washing #1,2, 8 and 9 contains fresh

water where as the others is fed from these tanks.

The capacity of each washing tank is about 950-1300liters.

NORMAL WASH: MERCERIZED WASH: DYED WASH:

• The fabric from drying cylinders passes through some tension rolls and also from anti static rods which absorbs the charge from the fabric. This rod has 5 KV voltages and 1800-18000A of current after passing through this fabric is winded on the batcher.

• Pad steam is suitable for achieving lighter shades.

• There is water dropping problem in pad steam.

• Pad steam is best for the dyeing of cellulose.

• There is MAHLO present in pad steam.

• pad Thermosol is best for achieving dark and medium shades.

• that is not in pad Thermosol.

• pad Thermosol is best for polyester dyeing.

• but its not in pad Thermosol

• Wet treatment processes can be carried out on pad steam.

• on pad steam padding, drying, steaming and then drying again.

• can’t be on pad Thermosol.

• In pad Thermosol drying and then curing takes place

• Pad Thermosol is used for the topping of reactive or pigment dyes.

RECIPE:

• Dye = 10 g/l• Glaubar salt =10 g /l• Soda ash = 15 g/l• Reduction inhibitor = 10 g/l

PROCEDURE:

• Pad the fabric in dye bath at 60–70 % pick up.

• Then steam the fabric for 1- 2 min 

WASHING:

(1) Cold wash 30 – 40 °C (2) Warm wash 50 – 60 °C (3) Soaping with detergent 2 g/l detergent at 90 -100 °C (4) Warm wash at 50- 60 °C (5) Cold wash 30-40 °C