직/편성물 염색

Non-Ecofriendly Textile Processing.

  • 출판일2002.06
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 286
Direct and reactive dyes applied to cellulosic fiber require aftertreatment to improve washfastness and lightfastness. The dyes and their most effective conventional aftertreatments generate effluent containing toxic, allergenic, and carcinogenic chemicals and metals. Effective aftertreatments for direct dyes generate effluent containing formaldehyde, copper sulfate, copper ions, chromium (dichromate), pyridine, or bisdichloromethyl ether. No government has banned formaldehyde use in aftertreatment of dyes, but several textile federations have imposed some limits. Conventional aftertreatment of reactive dyes results in 25-30 percent of the dye being hydrolyzed and entering the effluent. Reactive HE and ME dyes generate less than 5 percent hydrolyzed dye waste when applying the fixing treatment at pH 4-4.5.
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