Application of H_2O_2/NOBS activating system in cold pad-batch bleaching of cotton fabrics

Aiming at the problems existing in traditional cold pad-batching bleaching such as long dwell time and high consumption of alkali,application of H2O2/NOBS activating system in cotton fabric cold pad-batch bleaching is proposed.The influence of process conditions on the bleaching effect was investigated through single factor analysis and orthogonal experiments,and the activating bleaching mechanism was discussed.And complete application technology of H2O2/NOBS activating bleaching has been developed.The optimal conditions are as follows: H2O2concentration,30 g/L;the mol ratio of NOBS to H2O2,1∶4;NaOH mass concentration,6 g/L;piling time,6 h.The results show that the activator bleaching process has the advantages of improving the quality of the bleached fabric,eco-friendly and energy-saving.It remarkably decreases alkali consumption and shortens the piling time.