Ammonia Treatment in Textile Processing
“Ammonia Treatment in Textile Processing”
Before Studding “Ammonia Treatment” we have to know about the Pretreatments in textile processing….
Why we do Pre-Treatments?
Pretreatment is the heart of processing of textile. Grey cloth after weaving is quite unattractive and contains numerous natural as well as added impurities which hinder the successful carrying out of subsequent step like dyeing, printing and finishing.
What are Pre-Treatments?
In Pretreatment, all these impurities are removed and fabric is brought to a stage where it is more absorbent and white and can be easily processed further.
In other words Pretreatment process could be defined as procedures concerning about the removal of natural and added impurities in the fabric to an optimum level that can provide good whiteness and absorbency by utilizing minimum time, energy and chemicals as well as water.
Major steps involved in textile pretreatment are:
De-sizing,
Scouring,
Bleaching and
Mercerization or “Ammonia Treatment”
In every step, different chemicals are involved which are: » Wetting Scoring Agents, » Sequestering Agents, » Mercerizing Agents or “Liquid Ammonia”, » Hydrogen Peroxide Stabilizers and » Hydrogen Peroxide Killers.
Pretreatment is important!!!
70% of problems during dyeing and finishing are caused by pretreatment.
Now….
What is Mercerization?
Mercerization is a method for processing cellulose fibers by alkalis. This processing makes the inside of the fibers swell to exploit new fiber properties beyond their original feel or physical properties.
Sodium hydroxide (NaOH) and ammonia (NH3) are used as the alkaline chemicals for mercerization.
Ammonia Mercerizing of cellulose fibers
History:
The use of ammonia in mercerization has been known since the 1930’s and was developed commercially for fabric processing
Before Studding “Ammonia Treatment” we have to know about the Pretreatments in textile processing….
Why we do Pre-Treatments?
Pretreatment is the heart of processing of textile. Grey cloth after weaving is quite unattractive and contains numerous natural as well as added impurities which hinder the successful carrying out of subsequent step like dyeing, printing and finishing.
What are Pre-Treatments?
In Pretreatment, all these impurities are removed and fabric is brought to a stage where it is more absorbent and white and can be easily processed further.
In other words Pretreatment process could be defined as procedures concerning about the removal of natural and added impurities in the fabric to an optimum level that can provide good whiteness and absorbency by utilizing minimum time, energy and chemicals as well as water.
Major steps involved in textile pretreatment are:
De-sizing,
Scouring,
Bleaching and
Mercerization or “Ammonia Treatment”
In every step, different chemicals are involved which are: » Wetting Scoring Agents, » Sequestering Agents, » Mercerizing Agents or “Liquid Ammonia”, » Hydrogen Peroxide Stabilizers and » Hydrogen Peroxide Killers.
Pretreatment is important!!!
70% of problems during dyeing and finishing are caused by pretreatment.
Now….
What is Mercerization?
Mercerization is a method for processing cellulose fibers by alkalis. This processing makes the inside of the fibers swell to exploit new fiber properties beyond their original feel or physical properties.
Sodium hydroxide (NaOH) and ammonia (NH3) are used as the alkaline chemicals for mercerization.
Ammonia Mercerizing of cellulose fibers
History:
The use of ammonia in mercerization has been known since the 1930’s and was developed commercially for fabric processing