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POLYESTER DYEING WITHBlue SE2RL/Blue SR/N.Blue EXP
Almost all Blues and especially Navy Blue’s, are very sensitive to pH change. These dyestuffs require a minimum pH of 4.5 to 5, throughout the dyeing process; otherwise patchy and specky dyeing would invariable be the end result.
The following dyeing recipe and procedure will do away with the above problems.
Recipe:
- Blue dyestuff = x %
- Invadine TOP = 1 gpl (anionic dispersing & leveling agent – BASF)
- Formic Acid = 0.25 gpl
- Ammonium Sulphate = 1.0 gpl
Procedure:
- Start dyeing by first adding all the chemicals and auxiliary at 50°C and run 1 cycle (10 minutes)
- Add dissolved dyestuff solution and run 10 minutes at 50°C
- Raise temperature to 115°C @ 2°C/minute
- From 115°C to 135°C (for blacks 140°C) raise temperature @ 0.5°C/minute
- Run at 135°C for 30 to 45 minutes (for black at 140°C for 45 to 60 minutes).
- Cool down to 80°C and then drain
- No washing – Fill water and add
- Cylclonon ECO (BASF) = 2 gpl
- Acetic Acid = 2 gpl
- Start at 50°C and raise temperature to 80°C @ 3°C/minute
- Run at 80°C for 15 minutes
- Drain
- Cold wash
- Unload the batch
The above procedure may be used for all disperse dyeing to avoid problems that may occur time to time.
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