*Environmentally friendly*

236 Textile Dyeing

**100 % Cotton Yarn** 

In the same bath

add↓

Kleenox Knitz Liq 0.2% Kleerix PER Liq 0.3%

Kleenox Knitz Liq 1.0% Hydrogen Peroxide (50%) 7.0%

Koolwhite 2020 Liq 1% Rosba NBS 200 Liq 0.5%

Kleenox Knitz Liq 1.2% Koolcat Liq 0.1% Hydrogen Peroxide (50%) 7.0%

Koolwhite 2020 Liq 1% Rosba NBS 200 Liq 0.5%

Kleenox LF Conc Liq 1.0% o.w.f. Kool CAT Liq. 0.1% o.w.f Hydrogen peroxide (50%) 7.0% o.wf.

Kool white 2020 Liq 0.5% o.w.f. Rosba NBS 200 Liq 0.4% o.w.f.

Zywet Cab 125 Liq 0.6% Kleerix PE 500 Liq 0.8% Greendye Eco New Liq 1.0% Hydrogen peroxide (50%) 3.0%

Kool white 2020 liq. 0.7-1.0%

Kleenox Knits Liquid 10 g/L Hydrogen peroxide (50%) 10 g/L

Koolwhite 2020 liquid 10 g/L

Caustic soda flakes 2.0 % (To adjust pH at 12.0)

Caustic soda flakes 0.8 % (To adjust pH at 12.0)

Caustic soda flakes 10 g/L (To adjust pH at 12.0)

of product it's using and its consecutive environmental impact.

Today Kool'white 2020 is not merely a concept or a theoretical hypothesis but a wellestablished commercial bleaching catalyst that is giving benefits to our customer in terms of cost, time, and money saving and helping them to evolve as a green technologies user in international market. It has increased their market credibility and buyers prefer ability considering the fact that the ultimate consumer has become more conscious about the type

MLR 1:10, Rotate at 60°C for 10 min.

Caustic flakes - To Adjust pH of 12

MLR- 1:10, Treat at 80°C for 30 min.

Caustic flakes - To Adjust pH of 12

MLR- 1:10, Treat at 80°C for 30 min.

**100 % Cotton Hosiery** 

**Terry towel** 

**Bath Mat** 

At 70°C for 30 mins

**6.5 Bulk trial results** 

**Continous Bleaching range recipe** 

The specific heat of water is 4.186 Joule/ gram K. It requires 4.186 joules of energy to heat 1 gm. of water by 1 Kelvin. Assuming an MLR of 1:7, for every Kg. of cotton, 7 litres of water is used during the bleaching process. In order to heat water from 80 degrees to 100 degrees the amount of heat energy required will be:

Amount of heat energy required per kg. of cotton

= (100- 80) x 1000 x 4.186 x 7= 586040 Joules = 586 KJ

586 KJ is the amount of energy that will be saved for every Kg. of material processed. If calculated the impact of same on yearly basis for a production plant doing a bleaching of 30 Mt. On daily basis, the amount comes out to be

Amount of heat liberated per year for 30 Mt./ Day Plant

= 586 x 30 x 1000 x 365= 6416700000 KJ = 6416700 MJ

Thus on yearly basis a unit of daily production of 30 Mt. can save energy of the magnitude 6.41 x 106 MJ. If 6.41 x 106 MJ is extrapolated to various natural fuels available than we can save following quantity of fuel:


All the above mentioned figures are taken considering 100% performance of the concerned parameters involved. If taken in to account boiler efficiency, Combustion efficiency, Heat transfer losses, Steam Transportation losses than the figure will increase by 10 – 25%.

According to the United states Department of forestry, an average weight of a fully grown tree is about 680 Kg. Thus, by using Koolwhite 2020 Liquid as the bleaching catalyst we would be indirectly contributing to plantation of 1.5 trees per day. Also, it will lead to reduction in contribution of global warming by any organization since we are inhibiting 586 KJ of energy to enter in to our bio systems for every Kg. of cotton material bleached. Any organization will have its huge benefits in terms of carbon foot prints and help them to earn through carbon credits.

#### *Strength retention*

The intermediate manganese- perhydroxyl ion complex formed is a more stable complex as compared to perhydroxyl ions itself. Due to this the oxidation reaction becomes more site specific and there is a higher degree of decolourization and lesser degree of fibre damage. Fabric or yarn bleached using Koolwhite 2020 shows a lesser oxy-cellulose formations compared to conventional bleaching process.


saving.

consumption.

 Good hand feel Lower lint

Ultra low BOD and COD

Good decalcifying property

treatment known as Bio Polishing.

Features:

**8. Bipolishing** 

 In most cases a better colour yield Noticeably brighter shades Savings in dyeing costs possible

contribute to reduction in BOD, COD.

 Toxicologically and environment friendly pH of neutralised fabric remains steady

Possess good antimicrobial properties

**COD mg/l**

**BOD mg/l**

Based on Organic acid, does not contain mineral acid

Also possess property of core alkali neutralization

Pre-treatment of Textiles Prior to Dyeing 239

Thus the use of Koolwhite 2020 can lead to overall cost reduction by at least 4.10 Rs/Kg. In present competitive market where every penny counts, this is a significant amount of

Eco friendly textiles consume less energy and resources. Using eco-friendly fabrics and sustainable printing processes, alleviates the need for cost prohibitive energy and water

Greenacid New Liquid when used in processing sequence instead of acetic acid will

Greenacid ANV Liquid: an environment friendly solution for effluent treatment plants.

Parameters Greenacid ANV liquid

(mgO2/mg) 0.90

Cotton and other natural fibres based on cellulose can be improved by an enzymatic

Before Bio- polishing After Bio- polishing

At 27°C 5 days (mgO2/mg) 0.45

**7. Advantages to the subsequent dyeing and finishing process** 

Similar or even better wash, water- and rubbing-fastness properties

Rossari Biotech Ltd has introduced environment friendly products:

The yarn bleached using Koolwhite 2020 process shows a lesser cuprammonium fluidity and higher degree of polymerization. This clearly demonstrates that Koolwhite 2020 process causes lesser damage to the fibre as compared to conventional bleaching at 1000C. To confirm this CSP and RKM readings were taken for the same yarn and the results clearly justified the analogy.

The yarn bleached using Koolwhite 2020 is found to give better loom efficiency. In general the weaving performance is found to increase by 3-5 %.

#### *Weight loss*

The cuprammonium fluidity and the degree of polymerization data suggests that there has been lesser fibre degradation. Fibre degradation generally leads to formation of oligomers of lesser molecular weight. Due to their smaller size and partial hydrophilic nature, they tend to get easily suspended in water. Presence of emulsifying and wetting agents further enhance this action. This contributes to the weight loss of the fibre. Since in Koolwhite 2020 process there is a lesser extent of oligomer formation, the overall weight loss in the yarn or fabric is observed to be less. In general it has been seen that the weight loss is less by 2-5% on the weight of material.

#### *Smoother surface profile*

Koolwhite 2020 process leads to lesser oxy-cellulose formation. In bleaching process, it is observed that oxy-cellulose formation is higher on the surface as compared to the core of fibre. This is because of higher degree of abrasion and continuous contact with fresh bleaching solution. On the other hand Koolwhite 2020's reaction mechanism inhibits any damage to the yarn even after the ever changing fresh bleaching liquor on the surface of the yarn. Due to this the yarn profile is much smoother. This has an direct impact on the amount of finish to be used on the yarn. The customer using Koolwhite 2020 process can reduce the finish in the final bath from 15- 40%.

#### *Time saving*

Between the conventional bleaching temperature and Koolwhite 2020 bleaching temperature there is a difference of at least 250C. Also with tighter government regulations, hot drain has been banned. So even if the bleaching is taking place at higher temperature, it needs to be cooled down to 800C and then drained. With Koolwhite 2020 the bleaching temperature is itself at 800C. So, as compared to conventional process, we get an overall temperature difference of 500C including heating and cooling cycle. If we consider average rate of heating and cooling around 1.750C/ minute, the total time saving comes out to be 29 minutes. Just by adopting the catalyst and without changing any other parameter we can get a time saving of 30 min. minimum. A contribution of 30 min. for a 3.5 hr of cycle is 14%. This directly means that there is a scope of increasing the production by 14% if Koolwhite 2020 process is adopted.

#### **Summary of benefits**


Thus the use of Koolwhite 2020 can lead to overall cost reduction by at least 4.10 Rs/Kg. In present competitive market where every penny counts, this is a significant amount of saving.

Eco friendly textiles consume less energy and resources. Using eco-friendly fabrics and sustainable printing processes, alleviates the need for cost prohibitive energy and water consumption.
