Disperse dye

Presentation on
Disperse Dyes
Presented By :
Venue: NUB, Date : November 27, 2016
Name ID
1) Sihab uddin BTX-150100372
2) Shekh Sahriaz Kaiser BTX-15000375
3)Saiful islam BTX-150100376
4) Muhammad Nafiz Reza BTX-150100377

Welcome To Our Presentation

Disperse Dyes :
 Disperse dye is one kind of organic
substances which is free of ionizing
group .
 Disperse dyes are insoluble or partial
soluble in water and used
for dyeing synthetic textile materials.
 These dye derive their name for their
insoluble aqueous properties and need
to aqueous dispersion by using
dispersing agent.
 Disperse dyes is mainly used
for dyeing polyester yarn of fabric.

History of disperse dye
• In 1922, Green and Saunders made one type of colored azo
compound, in which a solubilizing group is attached to amino group.
• In dye bath, they are slowly hydrolyzed and produce azo compound
and formaldehyde bi sulphate. This free azo compound was capable
of dyeing cellulose acetate fibers. This dye was named “ionamine”.
But this ion amine did not give satisfactory result in dyeing.
• Later in 1924, Baddiley and Ellis produced sulpho ricinoleic acid
(SRA) for dyeing acetate fibers. This SRA was used as dispersing
agent. Later it was seen that SRA was capable of dyeing Nylon,
polyester, acrylic etc.
• In 1953 this dye was named as “Disperse Dye”.

Properties of disperse dye :
• Disperse dye is one kind of organic substances which is free of
ionizing group
• Disperse dye are non-soluble in nature.
• Disperse dye are insoluble in water.
• Dispersing agent are needed for dyeing with disperse dye.
• Fastness properties specially wet and light fastness is good to
excellent.
• Disperse dye widely used for dyeing synthetic fibers. Polyester fiber
is dyed by disperse dye.
• Disperse dye dyeing is carried out in high temperature.
• Molecular size of disperse dyes are smaller than other dye.
• In some case carrier method are applied for polyester dyeing.

Classification of disperse dye :
According to Chemical Structure:
• Nitro Dyes.
• Amino Kenton dyes.
• Anthraquinonoid dyes.
• Mono azo dyes.
• Di- azo dyes.

Classification of disperse dye :
According to Fastness Property :
• Group A: These dyes have excellent dyeing properties and good
fastness properties.
• Group B: These dyes are excellent in high temperature and for
carrier dyeing with moderate fastness.
• Group C: These dyes are moderate for carrier and high temperature
dyeing with higher fastness property than group B dyes.
• Group D: These dyes are of excellent fastness to heat but for
dyeing properties on carrier method.

Dispersing Agent :
The dispersing agent is an organic compound which can
perform many functions in dyeing. Dispersing agents are
effective under the dyeing conditions and stable to hard
water, high temperature and other dye assistance which
help to maintain dispersion of dye molecule in the dye
bath. It assists the process of dye particle size reduction
and helpful to solubilize the dye particle. Dispersing
agent increases the solubility of disperse dye in water.
Example: Urea, Lyoprint G.

Function of Dispersing Agent
used in Disperse Dyeing :
• It assists the reduction of dye particle size
• It enables the dye to be formed in the powder form.
• When the powder is added to dye bath, it facilitates the
reconversion of the powder into a dispersion that is
required for carrying out the dyeing.
• It maintains the dispersion in a fine form in the dye bath
through the dyeing process.
• It increases the solubility of the disperse dye in water.
• It affects on the rate of dyeing.

High temperature dyeing :
There are many advantages associated with dyeing
polyester at temperature range between 120°C and
130°C. Heavy shade can be dyed pleated because of
the permanency of the crease so formed. When dyeing
at atmospheric pressure, only dyes of low molecular
weight which tends to sublime during pleating can be
used, the more satisfactory colours with higher molecular
weights can be applied at 120°C -130°C.
Venue: NUB, Date : November 27,
2016

Carrier dyeing :
Carrier is an organic compound which helps to dye take
up at lower temperature and lower pressure over the
textile material. It acts as a substantive swelling agent.
Carriers are dyeing assistance which alter the dispersing
properties of the dyes and physical characteristics of the
fiber so that more of the dye can be transferred from the
dye bath to the fiber.

Commercial (Trade name) Name
of Carrier :
• Tumescal –A.C.I.
• Matexil –A.C.I.
• Levagol –Bayer.
• Dilatin –Sandoz.
• Invalon –Ciba.
• Hisogal –Hoechst.

Function of carrier :
 Dye carry.
 Solubility of dyes.
 T.G (glass trangition temperature) reduce.

Trade Names Of Disperse Dyes :
Name of dye Manufacturer Origin
Foron Sandoz Switzerland
Terasil Ciba-Geigy Switzerland
Dispersol ICI ** UK
Samaron Hoechst Germany
SRA British Celanese Ltd. UK
Setile ACNA *** Italy

Reference :
• http://textilelearner.blogspot.com/2012/01/classification-of-disperse-
dyes.html
• http://textilefashionstudy.com/disperse-dyes-properties-of-disperse-dye/
• https://sites.google.com/site/wwwtextilehelpercom/home/author/archive/disp
erse_dye-history-of-disperse-dye_properties-of-disperse-dyes
• http://textilelibrary.blogspot.com/2009/03/disperse-dye.html
• https://textileapex.blogspot.com/2013/12/disperse-dye_1.htm

Thank you for your Attention

Disperse dye

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