Green dyes for yarns threads
Environmental protection has always been highly valued. More and more people begin to pay attention to the green production of textiles threads, green agents, especially dyes, which are important components of textiles.
So what are the green characteristics of yarn thread dyes?
Authoritative data show that according to the possible ecological and environmental problems of various yarn thread dyes, green dyes should have the following characteristics:
1. Azo dyes which do not contain carcinogenic aromatic amines under specific conditions or free carcinogenic aromatic amines are not contained in dyes;
2. The dyes themselves have no carcinogenicity and sensitization.
3. The extractable heavy metals are below the limit value.
4. Formaldehyde content is below the limit value.
5. No environmental hormones;
6. Persistent organic pollutants without pesticides and chlorine-containing organic carriers;
7. Chemicals that do not cause environmental pollution;
8. Current dyes with non-structural factors adopt clean production and new technologies.
In addition to the above, yarn thread green dyes are also shown in dyeing properties (including color and brightness, dyeing uptake, fixation rate, lifting rate, leveling, reproducibility, etc.), fastness, simplified application process, reduced energy consumption, water consumption, reduced printing and dyeing wastewater and price, etc.) which exceed the prohibited dyes and currently used non-prohibited dyes.
Level. Generally speaking, dyes with the above characteristics can be called "green dyes".
In fact, the environmental protection quality index of yarn thread dyes has been put forward since the early 1970s, and has been constantly improved.
In order to comply with the trend of international environmental protection, domestic and foreign yarn dye enterprises also pay great attention to the research and development of green environmental protection dyes, and almost all kinds of fibers are involved.
But up to now, domestic enterprises have not paid enough attention to it and the technology level can not fully meet the requirements of the market, affecting the quality of textiles thread in China and directly affecting exports. This is still one of the important problems that domestic enterprises need to solve urgently.
