Dying of Polyester/Cotton Blends Fabric

Dying of Polyester/Cotton Blends Goods
(One bath one stage dyeing with disperse/ direct dyes at atmospheric pressure)

In this method the PC or CVC goods can be dyed at one single bath with disperse and selected direct dyes (stable in high temperature and compatible with polyester dyeing)- disperse for polyester and direct for cotton. Some direct dyes , for example , C.I. Direct Black 22 – the pH may be adjusted to 8-9 with soda ash.

Typical Recipe for
Dying of Polyester/Cotton Blends
Dispersing agent................................... = 0.5 – 1.0 g/l
Sequestering agent................................ = 1.0 – 2.0 g/l
Levelling agent...................................... = 1.0-2.0 g/l
Carrier .................................................= 1.0-3.0
Disperse dyes........................................= X%
Selected direct dyes.............................. =Y%
Acetic acid (50%) .................................= 0.5-2 g/l
Glauber salt ...........................................= 5.0 – 20.0 g/l
Temperature.......................................... = 90- 100
Time .....................................................= 60- 120 mins
M:L ......................................................= 1:10

Dyeing Procedure:
1. Ser the dyebath with substrate at 50 temperature and add dispersing agent, leveler, acetic acid , carrier and other auxiliaries , then urn the dyebath for 5-10 minutes.
2. Add both dyes and raise the temperatur4e to 90- 100 @ 1-2 C/min
3. Add glauber salt and run the bath for one to two bours at the same temperature .
4. Lower down the bath temperature to 70 – 80 over 10-15 minutes.
5. Drip the dyebath and carry on the aftertreatment process.

After Treatment Process:
1. Rinse twice with hot and cold water.
2. Treat the fabric with suitable fixing agent for improving the wet fastness properties of dyed goods .
3. Soap wash according to vender recommendation.
4. Rinse twice with hot and cold water and then
5. Neutralize with acetic acid. 
 
 

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