We will introduce the differences in color and how to choose coatings that encapsulate fluororesin, such as fluorine processing and fluororesin coatings.
■What color is fluoropolymer? The fluoropolymer coating commonly seen on household frying pans is often a dark color, but PTFE, which is frequently used for frying pan coatings, appears milky white under sunlight. ■Colors of fluoropolymer coatings Fluoropolymer coatings come in various colors, including green and gray, in addition to dark colors. This is because the coating materials are colored to enhance aesthetics and allow for differentiation based on purpose. ■Differences by color The differences in color of fluoropolymer coatings are not closely related to the type or characteristics of the resin. For example, green does not necessarily indicate PFA, nor does black indicate PTFE. Since fluoropolymer coatings are functional films, it is essential to choose them appropriately based on their intended use and environment. In such cases, it is important to consult a reliable processing company rather than selecting based solely on color. ■Fluoropolymer coatings for specific applications Fluoropolymer coatings demonstrate various functions depending on the type of resin, film thickness, and processing methods, across different applications and environments. It is crucial to select the appropriate coating based on the intended use, such as for non-stick purposes or corrosion resistance.
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Typical Fluoropolymer Resins ■PTFE (Polytetrafluoroethylene) It has the highest continuous use temperature of 260°C and excels in non-stick and low friction properties. ■PFA (Perfluoroalkoxyalkane Polymer) It has a continuous use temperature comparable to PTFE, with a low melt viscosity that allows for a continuous coating with fewer pinholes, which cannot be achieved with PTFE. It is the best-performing fluoropolymer for high-temperature corrosion-resistant coatings. ■FEP (Perfluoroethylene Propylene Copolymer) An improved resin of PTFE with a low melt viscosity. Although its continuous use temperature is lower than that of PTFE, it can achieve a smooth coating with fewer pinholes through sintering. Characteristics of Fluoropolymers ■Non-stick Dirt and grime do not easily adhere, and if they do, they can be easily removed. ■Slipperiness Items slide smoothly and very lightly. ■Chemical resistance It is not affected by most acids and alkalis, preventing corrosion of the substrate. ■Heat and cold resistance It can be used at a maximum temperature of 260°C and as low as -269°C. ■Electrical properties It possesses excellent properties in various electrical characteristics. ■Flame resistance It is almost non-flammable.
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Main Uses ■ Food Equipment Kneading machines / rolls / baking molds, etc. ■ Industrial Non-Stick Applications Mixers / centrifuges / heat sealers / molding dies / rolls, etc. ■ Chemical Plants Piping / tanks / valves / pumps, etc. ■ Semiconductor Manufacturing Equipment Plating jigs / solder jigs / semiconductor production lines, etc. ■ Lubrication Applications Bearings / piston rings / precision machine parts / escalator guides, etc. ■ Office Automation Equipment Fusing rolls / separation claws, etc. ■ Insulation Related Various electrodes / precision machine parts / insulators, etc. ■ Aerospace Industry Equipment Molding dies, etc. *For more details, please refer to the textbook on fluoropolymer coatings.
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To maximize the performance of manufacturing equipment and machine parts, Yoshida SKT derives the "optimal solution" tailored to our customers from hundreds of surface treatment technologies. - Decreased productivity due to adhesive troubles - Instability in product quality due to friction - Early deterioration of equipment due to corrosion We respond to these challenges in the manufacturing field with our extensive track record and reliable technical expertise. In 1963, we began fluoropolymer processing. In 1968, we signed a licensing agreement with DuPont (now Chemours), supporting manufacturing innovations for over 2,000 customers across various industries, from automotive to medical and aerospace. Furthermore, in 2024, we are focusing on the development of next-generation products, such as PFAS-free coatings, contributing to the advancement of sustainable manufacturing. With a three-base system in Nagoya, Tokyo, and Yamaguchi, we flexibly respond to both mass production and custom orders. Our consistent quality management system ensures that we deliver reliable quality. For solving challenges in the manufacturing field, trust the surface treatment experts at Yoshida SKT.
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