Process chlorine-free bleaching linen

2010-02-16  来源:本站原创  分类:Industry  人气:206 

Keywords: linen fabric, chlorine-free bleaching

Many developed countries have developed policies and regulations to restrict the use of chlorine bleach and the bleaching effluent AOX (AOX) concentration as a control indicator. The use of hydrogen peroxide bleaching linen as effective as chlorine bleach, therefore, chlorine-free bleaching process linen become the research hotspot in the textile industry.
① the beginning of the first drift with peracetic acid, and then use the hydrogen peroxide bleaching compound to replace the conventional sodium hypochlorite bleaching of linen, no chlorine bleach to achieve the requirements. Bleaching process of fiber strength loss is less than sodium hypochlorite bleaching process, peroxy B / acid bleaching of the capillary effect is better than sodium hypochlorite, with favorable results. Bleaching process are:
Peracetic acid 1.5-3.5 g / L
pH 7
Sodium pyrophosphate 1 g / L
Temperature 70 ℃
Time 60 min
Hydrogen peroxide 3-4 g / L
pH value of 10.5
Temperature 70 1 80 ℃
30 a 60 min time
② Foreign bleaching flax fibers, which uses chlorine-free (ECF, Elemental Chlorine Free) bleaching technology that used in the production of chlorite or hypochlorite instead of chlorine dioxide. This can reduce the production of chlorinated organic compounds.
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