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Is PTFE toxic?
- Categories:Industry news
- Author:FEP tube lady
- Origin:FEP tube lady
- Time of issue:2008-09-17 15:21
- Views:
Is PTFE toxic?
- Categories:Industry news
- Author:FEP tube lady
- Origin:FEP tube lady
- Time of issue:2008-09-17 15:21
- Views:
PTFE non-stick pan is carcinogenic? Is PTFE harmful to the human body?
In daily life, when many people use non-stick pans, they will encounter problems such as the coating peeling off, the food starts to stick, and the bottom of the pan is scratched. When encountering these situations, many people will have questions: the coating on the surface of the non-stick pan It is PTFE. Will the non-stick coating be toxic if the coating falls off? Today I will answer the confusion for everyone.
First, let's briefly introduce PTFE:
Polytetrafluoroethylene (PTFE) has outstanding excellent comprehensive properties, high temperature resistance, corrosion resistance, non-stick, self-lubricating, excellent dielectric properties, and a very low coefficient of friction. Used as engineering plastics, it can be made into polytetrafluoroethylene tubes, rods, belts, plates, films, etc.
It is used in corrosion-resistant pipelines, containers, pumps, valves, radar, high-frequency communication equipment, and radio equipment with high performance requirements. By adding any filler that can withstand the sintering temperature of PTFE, the mechanical properties can be greatly improved.
At the same time, other excellent properties of PTFE are maintained. Filled varieties include glass fiber, metal, metal oxide, graphite, molybdenum disulfide, carbon fiber, polyimide, EKONOL, etc. The wear resistance and limit PV value can be increased by 1000 times.
Figure 1 Source of PTFE tube: Miss Teflon tube
Polytetrafluoroethylene is also called non-stick coating or easy-to-clean material. This material is resistant to acids, alkalis, and various organic solvents, and it is almost insoluble in all solvents. At the same time, PTFE has the characteristics of high temperature resistance, and its friction coefficient is extremely low, so it can be used for lubrication and become an ideal coating for easy cleaning of the inner layer of water pipes. Teflon itself is not toxic to humans. The operating temperature is -190～250℃.
Polytetrafluoroethylene is toxic but does not cause harm to the human body. The non-stick coating is mainly polytetrafluoroethylene. For polymer coatings, the main possible risk comes from the residual material or the small molecule substances released during use. Many people worry that heating will decompose the coating and release harmful substances, such as certain perfluorinated compounds.
The non-stick pan coating uses PTFE (Teflon) dispersion emulsion. Because the molecular structure of PTFE is macromolecular clusters, it is necessary to add stabilizing additives to make PTFE uniformly dispersed in the emulsion. At present, domestic manufacturers generally use PFOA or PFOS are used as adjuvants, but PFOA and PFOS are 2B carcinogens. European and American countries prohibit the import of fluoropolymers containing PFOA and PFOS. Generally, foreign companies producing PTFE do not use such carcinogens as adjuvants.
Figure 2 Source of non-stick pan: Internet
Therefore, when consumers buy non-stick pans, they need to pay attention to whether the product is marked as free of PFOA and PFOS. If it is clearly marked, the product can be purchased with confidence. In addition, PTFE can work stably at 260 degrees Celsius for a long time, and the short-term temperature resistance can reach 327 degrees. The cooking habits of European and American consumers are generally based on low oil, medium and high temperature, etc., and pay more attention to the original taste and nutritional value of the ingredients, while the cooking habits of domestic consumers are generally based on high oil, frying, stir-frying, and high temperature. Therefore, non-stick pans of the same quality have a longer lifespan if used in Europe and the United States, but shorter lifespans if used in China.
A comprehensive number of studies on polymer coatings for non-stick pans have shown that they may release trace amounts of perfluorinated compounds at high temperatures, but the possibility of release during cooking is unlikely. For example, boiling with salt water and water for 2 hours, or heating to 280 degrees with soybean oil, did not find the typical decomposition and dissolution of perfluorinated compounds.
In general, non-stick pans that do not contain PFOA and PFOS are harmless to the human body. As the number of times of use increases, the release of perfluorinated compounds will be less and less. Only avoid appliances with non-stick coatings. The safety of high-temperature dry burning is guaranteed. The health risks of perfluorinated compounds are not great for the time being, so we can feel relieved a little bit.
Shenzhen DanKai Technology Co., Ltd. (ShenZhen DanKai Technology Co.,ltd.), whose predecessor was Dongguan Dandi Insulation Materials Co., Ltd. Fluoroplastic Material Factory, which was established in 1998, specializes in FEP, PFA, PTFE and other fluoroplastic pipes. An intelligent manufacturing enterprise for the research and development, production, sales and service of rod, sheet and film products and other insulating materials. The company has a senior R&D team with international standards and a production line of fluorine plastic products imported from abroad. Some fluoroplastic products have passed ISO9001, SGS, FDA certification, and have been fully affirmed by domestic and foreign cooperative customers such as Huawei, Foxconn, Midea, ZTE, Intel, and AirTAC. The main products of the company are: ①Tubes: Ptfe PTFE tube, Fep tube, Pfa tube, Pvdf tube; ②Heat-shrinkable tube: Ptfe heat-shrinkable tube, Fep heat-shrinkable tube, Pfa heat-shrinkable tube, Pvdf heat-shrinkable tube ; ③Board and rod film category: Ptfe board and rod film, Fep board and rod film, Pfa board and rod film, Pvdf board and rod film; ④Insulation materials: silica gel, PE, PVC, UPE, etc.; ⑤Special category: PFA imported connector, spiral Tube, spring tube, peeling tube, welding rod, tee, straight, gasket, joint, taper rod, flared tube, sealing tube, braided tube, bellows, etc. At the same time, fluorine plastic products of various specifications can be customized and processed according to customer requirements.
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