Ecological industrial textiles need double protection

Ecological industrial textiles need double protection The dyeing and finishing process is a key process for the production of eco-friendly industrial textiles. In the process of dyeing and finishing of industrial products, the hazardous substances involved mainly include soluble metal salts, formaldehyde, formaldehyde, and carcinogenic dyes. Therefore, the ecological dyeing of non-woven fabrics is an important research direction in the production of industrial textiles in the future, and it is also an inevitable choice to ensure the safety of the production and use of industrial textiles.

It is difficult to disable auxiliaries like disabling dyes. Member states of the European Union, including Germany, are discussing the issue of the ban of some additives, but so far no banned dye-producing agents have been proposed as banned dyes. This is mainly due to dyeing and finishing. The molecular structure of the additives and the opacity of the compounding ingredients increase the difficulty of disabling the additives.

The International Ecological Textiles Research and Inspection Association, consisting of 13 research institutes in Austria, Germany, Switzerland and other European countries, has been devoting itself to the development of eco-industrial products. According to Gavin, who is responsible for the association’s textile industry, the goal of textile products for eco-industrial use is not to cause harm to human health when used, and to reasonably limit harmful substances on textiles and establish a corresponding quality monitoring system, for example, for some dyeing and finishing auxiliaries. Disabling and further implementation of the concept of "green additives".

Currently, EU member states including Germany are discussing about the ban of some additives, but so far there is no such kind of banned dyeing and finishing additives as dyes, which is mainly due to the molecular structure and complex of dyeing and finishing auxiliaries. The opacity of the ingredients has increased the difficulty of banned additives. Although there are currently some projects that have clear boundaries, such as technical textiles for eco-industrial textiles as specified by the Oeko-Tex Standard 100, most of the projects do not have clear standards and can only refer to the regulations and practices of some other countries and are relatively vague.

In the field of commodity circulation, certain standards for industrial textiles are represented by quality labels. With the increasing awareness of environmental protection, the label ecology and toxicology of industrial textiles will surely attract more and more attention.

Biodegradable dispersants reduce formaldehyde pollution A biodegradable dispersant called acid-tolerant formaldehyde polycondensates is not affected by formaldehyde restrictions. Its biodegradability is very strong, and about 70% to 75% of the fraction can be To achieve biodegradation, this will have a positive and positive impact on ecological and environmental protection.

Non-woven fabrics finished with formaldehyde-based cross-linking agents will release some of the unformed or hydrolyzed free formaldehyde during use, which will cause damage to human health. Although current regulations or standards in various countries impose strict restrictions on the free formaldehyde content of products, for example, the formaldehyde content of clothing and textiles that contact the skin cannot exceed 75 mg/kg, and clothing and textiles that are not in direct contact with the skin and the decorative industry are used. The free formaldehyde content of textiles cannot exceed 300 mg/kg, but the effect is still not satisfactory.

Formaldehyde is used as a reagent to improve the durability of the dyeing and finishing auxiliaries on non-woven fabrics, but the free formaldehyde of the dyeing and finishing auxiliaries and the release of formaldehyde cause the non-woven fabric to contain excessive amounts of formaldehyde, which may cause the formaldehyde content on the fabric to exceed the relevant The prescribed limit value.

A U.S. company cooperating with the International Ecological Textiles Research and Inspection Association announced that the company is currently working on a biodegradable dispersant called formaldehyde-resistant formaldehyde polycondensates. Such dispersions such as NNO, MF and other products also contain a small amount of free formaldehyde, but its molecular structure is not as active hemiacetal as N-methylol, there is no reversible reaction, and it does not need to be synthesized. Excessive formaldehyde maintains the equilibrium of the reaction, and the CC bond energy is large, and it is difficult to hydrolyze and release formaldehyde. In this sense, these dispersants are not affected by formaldehyde restrictions, and their biodegradability is very strong. About 70% to 75% of the components can be biodegraded, which will bring positive results to the ecological environment. positive influence.

Revised standards to strengthen the scope of heavy metal monitoring In the 2013 revision process, in addition to the 10 heavy metals and ions specified in Oeko-Tex Standard 100, children's toys, daily consumer goods, and new packaging materials will be repositioned, and Selenium is also included in the monitoring range.

For industrial textiles, especially the chemicals and additives used in the processing of nonwovens have a certain impact on the ecological environment of textiles. Therefore, it is necessary to control the harmful metals in the process of industrial textiles, especially protective products.

In the revised Oeko-Tex Standard 100 in 2000, the determination of heavy metals can be tested using instruments such as ICP, AAS, or UV-VIS according to test conditions and regulations. However, during the 2013 revision process, relevant director of the International Ecological Textile Research and Inspection Association Gavin stated that in addition to the 10 heavy metals and ions specified in the Oeko-Tex Standard 100, children's toys, daily consumer goods and new packaging will also be included. Repositioning of materials, etc., and monitoring of selenium and selenium are also included.

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