Pretreatment of Cotton/Cellulose fabric & its blends
Water Quality and Analysis: Water is the life line for any wet processing. Better the quality of water better would be the quality of dyeing. Read more ...
Scouring of polyester/cotton blends:
Scouring is mainly designed to remove the natural oils and waxes from the
cotton portion and the finish oils which manufacturer add to polyester fibres when
extruded. Blends of polyester/cotton can be scoured with alkaline scouring agents
as per conditions shown in Table. Trisodium phosphate can also be used as an
Alkaline Scouring Conditions for Polyester/Cotton Blends
|Equiment||Scouring Agent & conditions|
|Jigger|| Caustic soda (3%) at 70~ for 90 min or at 100~
for 15 min.
|Jigger||Soda Ash 5-10 gpl detergent 2-5 gpl at boil or Caustic Soda 2-5 gpl and detergent 2-5 gpl at 75 deg celcius.|
|Winch||Caustic Soda 1-2 gpl or Soda Ash 2-5 gpl at 75 deg celcius.|
|Pad-Steam||Soda-ash (5-10 g/l) and detergent (2-5 g/l), 100%
pick-up, steaming at 100~ for 30-60 min.
100% Cotton woven fabric has to be pretreated as below:
Singeing/Desizing: - to remove protruding fibers raised during weaving and further mechanical operations flame singeing is done. Read more...
Scouring and Bleaching:- to remove the natural impurities and coloring matter from the cotton cellulose and to make it uniformly absorbent.
Mercerization:- to impart lusture and strength to the cellulose in addition to make it highly absorbent.