Scouring cotton

In cotton scouring, SAE also exhibits detergency comparable to that of the conventional nonylphenol ethoxylates as in Figure 29. 

Figure 29. Cotton scouring efficiency of ethoxylates (test conditions apparatus— Terg-O-Tometer water temperature—80°C agitation speed—95 rpm scouring time—60 min rinse time—30 min surfactant concentration—0.2 wt % NaOH concentration—4.0 wt % liquor volume—1.0 L reflectance before scouring—...

Although jute is a natural fibre like cotton, it differs in chemical composition. Unlike cotton jute contains a high percentage of non-cellulosic matter (about 40%) and the pre-treatment processes of jute are somewhat different from that of cotton. Scouring of jute with caustic soda under pressure cannot be carried out like cotton because of removal of hemi-cellulose which results in high losses of tensile strength (10-15%) and weight (6-8%). 

M ht scouring operations in which these surface-active compounds are commonly used varv according to the nature of the fibre and the amount and composition of the impurities to be removed. In the case of cotton the cellulose of w hich it is composed is stable to dilute solutions of alkali at the boil. I he imphrities which must be removed are natural oils and waxes, proteins, pectic substances, natural colouring matter, and adventitious dirt. The basic principle of cotton scouring is to boil the goods for several hours at atmospheric, or under elevated, pressure with a 2 per cent solution of sodium h) droxide. 

Selection of the Fibre.—Cotton fibre, wood fibre, and flax fibre in the form of raw cotton, scoured cotton, paper, and rags are most generally used, and give the best results. As the fibres differ greatly in their stmcture,... 

Csiszar, E., Szakacs., G., and Rusznak, I. (1998). Combining traditional cotton scouring with cellulase enzymatic treatment, 68(3),... 

Uses Wetting agent and emulsifier for textiles, cotton scouring, metal cleaning Properties Wax HLB 14.4 100% cone. 

Uses Detergent for textiles, industrial wool-washing, cotton scouring Properties Liq. HLB 11.4 100% cone. 

Zycowet Zyoowet-P antiredeposition agent, cotton scouring Zycowet Zyoowet-P antiredeposition agent, desizing Masquol A340N... 

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