Dyeing of polyester with disperse dye (Carrier Method)

Theory: Disperse dyes are non-ionic in nature, almost insoluble and stay as finely divided dispersed from in water. It can be hydrolyzed in high temperature especially under alkaline condition. Therefore dyeing with disperse dyes is virtually always done using slightly Acadia condition. It is a unique dye staff for dyeing of polyester, nylon and cellulose acetate fiber.

These colorants have inherent affinity to the fiber and are simply mechanically trapped in the fiber structure during dyeing of a hydrophobic fabric contents that the fiber absorbs dye molecule, which are dissolved in the dye both.

Recipe:

Disperse Dyes = 1.5% (owf)

Carrier   = 2 g/l

Wetting agent = 1 g/l

Sequestering agent = 1 g/l

CH₃COOH  = 1 g/l

Ph  = 4.5 – 5.5

Temp = 80°C

Time = 35 min

Sample weight =5 gm

Reduction & Cleaning:

NaOH    = 3 g/l

Hydroze = 2 g/l

Temp = 70°C

Time = 10 min

 Neutralization:

CH₃COOH = 1 g/l

Temp = 50°C

Time = 10 min

Fabric type - Carrier
Fabric Name - Polyester
color - Blue

Friction of the chemical required:

Wetting agent: It accelerates the wetability of material in solution thus helps to easy penetration of chemicals into substrate. Usually it is used in scouring, bleaching & dyeing process. It is available in market in from of yellowish liquid.

Sequestering agent: It one kind of surfactants surface active agent act in solid liquid, solid gas or liquid gas interfaces and reduces the inter-facial tension.

Dispersing agent: It is used in disperse and vat dyeing process helps to distribute the dye molecules in dye both. It is also helps to penetrate the dye molecules into the substrate. It is available in market in powder from.

Recipe calculation:

Dye: 100 gm fabric for  1.5 gm dye

           1     gm        “     “    1.5/100 “

            5   gm        “   “         1.5×5 / 100 “ = 0.075 gm

Water: 200 gm [ m:L = 1:40]

Carrier  ,    1000 CC water, Carrier  required = 2 gm

                    1              “              “               “      =60 / 1000 “

                    200          “                “             “      = 2 × 200 / 1000    gm = 0.4g

Similarity,

Wetting agent = 0.2 g/l

Sequestering agent = 0.2 g/l

CH₃COOH = 0.2 g/l

Reduction & cleaning:

NaOH = 0.6 gm

Hydroze = 0.4 gm

Neutralization:

CH₃COOH = 0.2 g/l

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Conclusion: The addition of dispersing agent increase the dye solubility and accelerate the dye diffusion into the swelled fiber structure. The dye diffusion can be detained either. Using a suitable currier or providing high temperature and pressure.

How to dye Polyester using the Stovetop method