Textile Wet Processing -1 (lab)

Experiment Name :

Bio-polishing of 100% cotton knitted fabric with cellulose enzyme.

Theory :
In this experiment bio-polishing is done to remove hairiness,reduce the pilling tendency,reduce fluff from textile materials.By doing this process textile materials become more luster,increase absorbency and improve handle properties like softness and flexibility.So after finishing this process textile materials are ready for dyeing. 

Nature of sample :
The sample that we have taken a cotton fabric.It is carded yarn's fabric and knitted fabric.

Instruments required : 
1.Cellulose enzyme
2. Gas burner
3.water
4.Thermometer
5.Glass rod
6. Scissor etc.

Process sequence : 
Grey fabric - Bio-polishing at 50'c(25 min) - Rinsing temperature at 30'c (3 min) - Cold wash - Hot wash - Cold wash - Drawing .


Recipe : 
Cellulose enzyme = 1% owf  (stock solution- 1%)
Acetic acid = 0.7 g/L ( stock solution- 1%)
Temperature = 50' C
Time = 20 min
pH=4.5-5.5
Sample wt = 5 gm
M:L = 1:20


Calculation :
Sample wt = 5 gm
M:L = 1:20
Amount of total liquor = 5 X 20 ml = 100 ml
Cellulose enzyme = (5 X 1%) / 1% = 5 ml 
Acetic acid = (100 X 0.7) / (1000 X 1%) = (100 X 0.7 X 100) / (1000 X 1) = 7 ml
Total water = 100 ml - (5 + 7) ml = 88 ml


Procedure : 
First we have to take total liquor in a glass. In the glass we have to take the sample. After taking all these we have to heat the glass in 20 min. In heating process we have to shake total liquor by glass rod in time to time.

Process curve :

Sample attachment :

Conclusion : 
Bio-polishing is very important in textile industries for many purposes. In this experiment we came to know how to do bio-polishing. We think, this experiment will be very helpful in our future working life.