Dyeing Of Nylon Yarn With Acid Dye
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Dyeing Of Nylon Yarn With Acid Dye
Objects: – The main object of this process is to iron the fabric.
- To dye nylon yarn.
- To know about acid dyestuff.
- To know how it work.
- To have an idea of dyeing curve on Nylon yarn.
- To know about the recipe.
Introduction:
Acid dyes are sodium salts of sulphonic acid but there are a few containing Carboxyl groups. The acid dyes have a direct affinity towards protein fibers and polyamide fibers. Applicable for wool , silk, nylon. Applied from an acidic dye bath. The fastness properties of this dye-stuff depends on the fiber type.
Recipe:
- Acid dye — 2%
- Acetic acid – 1 gm/L
- Leveling agent — 1 gm/L
- pH = 4.5-5.5
- Temp × Time = 90ºc × 30 min
- M:L = 1:20.
Calculation:
- Sample weight = 5 gm
- Total liquor = 5×20= 100cc
- Dyestuff require =( Sample wt x % of the dye ) / % of the stock solution = (2%× 5)/1% = 10cc
- Required Acetic acid = (1 × 100)/(1000×1%) = 10cc
- Required leveling agent = (1 × 100)/(1000×1%) = 10cc
- Additional water require = 100- (10+10+10) = 70 cc
Fig: – Dyeing curve on Nylon fabric.
Procedure:
- First required amount of water and leveling agent is mixed in a closed vessel.
- Then added dye to this mixture.
- Then added Acetic acid.
- Finally sample is taken in this soln and closed the open end of the vessel.
- Then vessel is kept on the rotadryer m/c and heated 90° c for 30min.
- Then the vessel is open and the sample is drawn out.
- Then the sample is drawn out and washed with water.
Precaution:
- The sample should be kept uniformly in the mixture. Otherwise non-uniform dyeing will do.
- Amount of chemical and water must be accurate.
- Chemical must mix with water very well.
Conclusion:
Dyeing is an important experiment in textile technology. Nylon is the mostly used fibre from old ages to now. So, this experiment will do a great favor to us in future days.
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LearnTextiles
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