In 1938, DuPont in the United States synthesized polytetrafluoroethylene (PTFE) and developed a "Teflon" non-stick coating. This process involved dispersing PTFE in small particles within a solvent and then sintering it at high temperatures between 360–380°C to form a thin film. The resulting coating can withstand long-term use at temperatures ranging from -195°C to -250°C, and it exhibits superior chemical resistance compared to other polymers. It is widely used for non-stick surfaces, such as the inner coatings of cookware and the lining of polymerization reactors. During the 1960s, Elf Atochem introduced the "Kynar 500" brand of polyvinylidene fluoride (PVDF) fluorocarbon resin, which became popular in exterior architectural coatings. PVDF offers excellent weather resistance, water resistance, stain resistance, and chemical resistance, making it ideal for building exteriors. However, because PVDF is insoluble in common solvents, it requires high-temperature sintering at 230–250°C to form a durable coating. As a result, it is mainly used on materials like aluminum panels, color steel plates, and profiles that can be baked in ovens. This limitation restricts its broader application in construction projects without such equipment. In 1982, Asahi Glass Co., Ltd. developed a fluoroolefin-vinyl ether copolymer (FEVE) resin. This new material incorporated functional groups such as soluble, adhesive, cross-linkable, and rheological components, allowing it to dissolve in common solvents at room temperature and cure without high heat. FEVE-based fluorocarbon coatings expanded the application range of fluorocarbons to include materials like PVC profiles, steel structures, glass-reinforced plastics, and even large steel plates that couldn't be baked. It also found uses in bridges, building facades, and non-ferrous metals, glass, ceramics, wood, and stone. In the mid-to-late 1990s, water-based fluorocarbon emulsion resins were successfully applied to coatings. These waterborne systems offer comparable or even better performance than traditional solvent-based coatings in terms of weather resistance, water resistance, pollution resistance, and chemical resistance. Additionally, they are environmentally friendly, helping to meet stricter regulations in Europe and the U.S. Their ease of application and lower cost make them more competitive than similar solvent-based products. As a result, waterborne fluorocarbon coatings have become the leading trend in architectural finishes. As technology continues to advance, new innovations in fluorocarbon coatings are emerging. Recent developments include hydrophilic self-cleaning coatings, fire-retardant coatings, wear-resistant and lubricated coatings, fluorescent coatings, electrothermal coatings, powder coatings, waterborne wood coatings, and nano-fluorocarbon coatings. These advancements reflect the growing demand for multifunctional, eco-friendly, and high-performance surface treatments across various industries. Today, over 20 fluororesin manufacturers operate globally, spanning more than ten countries. In 2000, global fluororesin production capacity reached approximately 100,000 tons, increasing steadily to 120,000–140,000 tons by 2005. Major international producers include DuPont (USA), ICI (UK), Ato-Fina (France), Asahi Glass (Japan), and Daikin (Japan). Their annual capacities range from 3,000 to 20,000 tons. Domestically, companies like Shanghai San Aifu and Changshu Zhongyi are also expanding their production capabilities rapidly. Compared to foreign markets, the global fluorocarbon coating industry has been more mature, with well-established technologies, standardized operations, and extensive application experience. Companies like PPG, Daikin, and Asahi Glass are recognized leaders in this field. In contrast, China's fluorocarbon coating industry started later but has experienced rapid growth. Over the past decade, it has not only replicated overseas technologies like Teflon non-stick coatings and high-temperature PVDF coatings but also successfully developed room-temperature curable FEVE coatings. Additionally, it has adopted cutting-edge waterborne and functional fluorocarbon coatings. Leading domestic brands include the FC-S series solvent-based and FC-W series waterborne fluorocarbon coatings from Shanghai Hengfeng Fluorocarbon Materials Co., Ltd. Centrifugal Pump,Horizontal Centrifugal Pump,Multistage Centrifugal Pump,Vertical Centrifugal Pump Shanxi Skysea Pump Lndustry Co.,Ltd. , https://www.skyseatianhai.com
Development of fluorocarbon coating industry at home and abroad
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