Textiles in the production process to use a variety of chemicals, regardless of the type or quantity analysis, the most used is a textile auxiliaries.According to incomplete statistics, the current annual output of the world's textile auxiliaries more than 4.5 million t, A total of nearly 100 categories,Textile Auxiliaries about 16,000 varieties, the annual consumption of 4.3 million t in these textile auxiliaries, many varieties contain or in the course of the use of human health and ecological environment will produce harmful chemicals , When people use and wear these textile auxiliaries containing textiles and clothing, residual in the textile products on the harmful substances will cause harm to human health and the ecological environment, so many international countries and organizations on a variety of textile auxiliaries Conducted a detailed toxicology and ecotoxicological research, and promulgated the ban on and restrictions on textile auxiliaries of the regulations, of which the main European.
There are nearly 3,000 varieties of textile aids that have been banned and restricted in the international market at present. More than 18 varieties of textile auxiliaries in the international market, although they are aimed at eco-textiles, that is, textile auxiliaries Of the safety and ecological requirements, but in accordance with the requirements of the international market, the general textiles can not contain harmful chemicals, or higher quality of the textiles is still high quality of security or failure of quality products.
In order to judge the amount of VOC in the adjuvant, it must be quantitatively analyzed. The olfactory judgment method is not enough and wrong for both the safety of the human body and the measurement.Currently, the definition of VOC is determined by the carbon The compound has a combination of one or more nitrogen, oxygen, hydrogen, sulfur, phosphorus, silicon or halogen (fluorine, chlorine, bromine, iodine) and has a vapor pressure of more than 0.01 kPa and does not occur at 20 ° C or operating conditions Chemical change. Switzerland in addition to considering the chemical vapor pressure, but also provides the boiling point of the standard pressure ≤ 240 ℃ and no chemical changes, etc., which is the basis of VOC quantitative analysis, usually using the instrument portfolio for analysis. Is the use of larger amount of VOC processing, the original use of paste thickener in the mineral oil content of 35% to 65%, VOC volume greatly exceeds the limits allowed by the regulations,Textile Auxiliaries so the development of powder thickener, although the amount of VOC From the original 35% to 65% down to 4% to 6%, but the processability (such as solubility and expansibility, etc.) is relatively poor and easy to fly dust, coupled with the preparation of paste viscosity control and adjustment more difficult , But also because the expansion is not sufficient to produce gel particles blocked Such as stencils, etc. The newly developed new paste-like synthetic thickeners prepared on the basis of VOC-free natural oil have solved both VOC and paste thickening (Including mineral oil) a series of advantages.
The safety requirements of textile auxiliaries are the necessary indicators for the selection of additives in the textile industry.It describes the basic safety requirements of today's textile auxiliaries: (1) VOC-free (nonvolatile organic compounds); (2) FA or low FA (No formaldehyde or low formaldehyde);Textile Auxiliaries (3) no DS (no risk of chemical substances); (4) no EH (no environmental hormones); (5) no PFOS and PFOA (perfluorooctane sulfonate and Acylate and perfluorooctanoic acid); (6) no AOX (no adsorbable organic halide), and put forward the development trend of textile safety requirements, and further elaborated the textile chemicals in the disabled and restricted chemical substances in the new developments: 1) restrictions on polyhalogenated dibenzo-p-dioxins and polyhalogenated dibenzofurans are more stringent; (2) fluorinated greenhouse gases are banned; (3) new restrictions on flame retardants and so on.