PFOA is the raw material of polytetrafluoroethylene chemical products, which refers to perfluorooctanoic acid. It has unique surface waterproof activity, high temperature resistance and oxidation resistance. It is usually an indispensable processing aid for the production of high-performance fluoropolymers. Perfluorooctanoic acid is mainly used for waterproofing and antifouling. It is widely used in textiles, carpets, paper, coatings, fire fighting foam, image materials, aviation hydraulic oil and other products because of its oil and water repellency.
PFOS is one of the most difficult organic pollutants to degrade. It has high bioaccumulation and a variety of toxicity. It will not only cause human respiratory problems, but also lead to the death of newborn infants. The global pollution caused by PFOS is attracting more and more attention. In December 2002, the 34th joint meeting of the chemical Committee held by OECD defined PFOS as substances that persist in the environment, have biological savings and are harmful to human beings.
Around 2001, the data provided by the U.S. Environmental Protection Agency (EPA) pointed out that perfluorooctyl sulfonyl compounds (PFOS) have high persistence in the environment, accumulate in the environment and human and animal tissues, and pose potential risks to human health and the environment. Based on environmental management and human health, the United States terminated the production and use of PFOS, At that time, the scotchguard FC series of 3M company in the United States was discontinued.