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Long-term exposure to formaldehyde hazards China Textile Industry Association Testing Center Director introduced in order to make the clothes more smooth, crease-resistant, more solid color, dyeing and finishing processes such as production and processing, formaldehyde is often used as a preservative and thickener added When it reaches a certain value, it can cause harm to human skin and body. Long-term use of formaldehyde textiles can cause chronic respiratory diseases, conjunctivitis, pharyngitis, asthma, bronchitis, may cause serious cancer, children like to crunk and suck textiles, but also may directly produce toxic reactions. "For example, some shirt collar quite straight, with iron-free effect, the initial raw material is very soft, with a resin containing formaldehyde just become stiff," said Gong Yancheng Institute of Materials, Beijing Institute of Clothing. In our list of toxic chemicals priority control, formaldehyde ranked second. Gong Research into explained that formaldehyde is a slow release of gas, will be absorbed by human skin. The body temperature is higher, the skin toxin absorption capacity is stronger, if not promptly excreted toxins, it will have an adverse effect on various organs of the body. In addition, inhalation of high concentrations of formaldehyde, will seriously irritate the respiratory tract, or eye irritation, headache and so on. Often inhaled a small amount of formaldehyde can also cause chronic poisoning, and long-term exposure to formaldehyde, and even lead to cancer such as nasal cancer, lung cancer. Determination of formaldehyde content of clothing With the rapid development of the times, testing equipment is more advanced, more simple and convenient to use, of course, a variety of testing instruments in all fields have also played an increasingly important role in clothes containing formaldehyde , Then how to detect the content of formaldehyde in clothes? What are the standards of formaldehyde content in clothing? Formaldehyde content of textile and garment testing In order to better control the formaldehyde content of textile and apparel, formaldehyde must first be detected on the cloth. At present, the test method of free formaldehyde in textile and apparel is the international standard test method. General Japan JZS and the United States AATCC test method. National Textile Standardization Technical Committee in 1998 on GB2912-82 "determination of formaldehyde in textiles" standard was revised, the old standard is divided into two: (1) the current standard GB / T29121-1998 "Determination of formaldehyde in textiles" (2) GB / T29122-1998 "Determination of formaldehyde in textiles" - Part 2: Release of formaldehyde (Vapor absorption method The above two standards are the same level of international standards adopted The standard in principle with the Japanese JZS and the United States AATCC test method is basically the same, the level of international standards.Water extraction method, also known as liquid or A method used to simulate the process of human wearing fabric quantitative determination of formaldehyde release, apply Of the textile products. Vapor absorption method, also known as gas phase method or B method, the main simulation fabric in the storage and pressing process for the release of formaldehyde quantitative determination method, mainly applicable to the production and storage of formaldehyde content determination .Water extraction method is Determination of the total amount of free formaldehyde extracted by hydrolysis Determination of the principle is that the textile and garment fabrics in 40% aqueous solution extraction time, from weaving Quasi-extraction of formaldehyde is absorbed by water, and then the extract was acetylacetone color, and then color spectrophotometer colorimetric determination of absorbance, the measured absorbance compared with the standard curve, and finally measured the textile Of the total amount of formaldehyde.This method is applicable to the determination of formaldehyde content in any state of textiles.Formaldehyde content of 20mg / kg to 350mg / kg of textiles.At present our country's current standard of "formaldehyde content in textiles limited" provisions can only be used A method to teach you how to test the content of formaldehyde in clothes.Very bright clothes, although beautiful, stalls, online shopping clothing is cheap, but for their own health, not to suffer greater losses due to petty benefits, therefore, Professor Gong Research recommendations, Consumers should try to avoid buying stalls or market cheap clothing, choose clothes, try to avoid the choice of brightly coated clothes. Children should pay attention to the purchase of clothes on the metal zipper, zipper color bright, and obviously coated , Should try to buy less.
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