Environmentally friendly dyes
In accordance with the requirements of ecological textiles and the ban on 118 kinds of dyes since, environmental protection dyes have become the focus of the development of the dyeing industry and printing and dyeing industry, environmental protection dyes are extremely important conditions to ensure the ecological nature of textiles. In addition to the necessary dyeing performance and the applicability of the use process, application performance and fastness performance, environmental dyes need to meet the requirements of environmental quality.
Environmentally friendly dyestuffs should include the following ten aspects.
(1) Does not contain azo dyes expressly specified by the German government and the European Community and Eco-Tex Standard 100 that under certain conditions will crack and release 22 carcinogenic aromatic amines, whether these carcinogenic aromatic amines are free in the dye or are produced by the cracking of the dye.
(2) Are not allergenic dyes.
(3) Are not carcinogenic dyes.
(4) Are not acutely toxic dyes.
(5) The content of extractable heavy metals is below the limit value.
(6) Does not contain environmental hormones.
(7) Does not contain chemicals that produce environmental pollution.
(8) Free of mutagenic compounds and persistent organic pollutants.
(9) Formaldehyde content is below the specified limit.
(10) does not contain varieties of restricted pesticides and the total amount is below the specified limit.
In a strict sense, dyestuffs that can meet the above requirements should be called environmentally friendly dyestuffs, and in addition to meeting the above requirements, true environmentally friendly dyestuffs should also be environmentally friendly in the production process and should not produce “three wastes”, even if they produce a small amount of “three wastes”, they can be treated by conventional methods to meet the requirements. Even if a small amount of “three wastes” are generated, they can be treated by conventional methods to meet the national and local environmental and ecological requirements.
