To De-size Given Cotton Grey Fabric By Enzymatic Desizing and Calculate the Percentage Loss Weight Of Fabric
Aim :- To Desize Given Cotton Grey Fabric By Enzymatic Desizing and Calculate the Percentage Loss Weight Of Fabric
Chemical and Conditions :-
Material Liquid Ratio - 1:40 (in lab)
Desizing Agent - 2-3 % (of weight of material )
Nacl (common salt ) - 5 % ( of weight of material )
PH - 6.5-7 (adjusted by Acetic Acid )
Temperature - 80*c
Time - 1 hour
Theory :-
The Main Objective Of Desizing is to remove size from the fabric i.e, to make the fabric size free
To Accelerate Desizing Enzymes are used for Forthcoming process . In Enzymatic Desizing , Enzymes are used for the Degradation of starch molecule into the sample compounds which can be washed away from fabric . Enzymes are bio catalyst product and they degrade starch , so called Amylase .
They are sensitive to continuous processing and successfully operate within limit of temp. and PH they can attack starch molecule in random way by breaking them in small parts , which are water soluble.
Procedure:-
Take Weight of the fabric sample accurately , by removing all extra threads.
then calculate the quantity of Nacl ( common salt ) and Desizing Agent .
prepare the desized bath in the water as per MLR (material liquor ratio).
Now add all the required chemical in Desized bath .
Check and adjust the PH of the bath upto 6.5-7 by acetic acid .
set the bath at 80 degree C.
now enter well wetted fabric sample in the desized bath and run the bath for 1 hr.
Take out the material for Hot and Cold Water Rinsing and dry the fabric and now take the weight of sample again and calculate the % age loss in weight .
Solution Used :-
Chemical Quantity - weight of material × Required concentration
prepared concentration
Result :- percentage %age loss in weight of fabric is ______.
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