A degreasing process to ensure strong adhesion of the non-stick "fluororesin coating" to the substrate. This explains "pre-baking."
■ What is the degreasing process? It is the process of removing oils, fats, and dirt that are attached to the surface to be coated. ■ Issues arising from insufficient degreasing It can lead to problems such as the coating material repelling, poor adhesion of the paint film, and the occurrence of appearance defects like stains. ■ Types of degreasing methods - Air roasting - Solvent cleaning ■ Air roasting process The substrate is heated in a roasting furnace to a temperature above the coating processing temperature, allowing oils and other substances to be oxidized and burned off. Typically, roasting is performed for several hours at temperatures exceeding 400°C. ■ Advantages of air roasting - No toxic gases are generated during the decomposition of oils, which are broken down into water and carbon dioxide. - It can completely decompose all organic components that could cause problems during the coating firing process. - It can accommodate large products as long as they fit into the roasting furnace. Fluoropolymer coatings, which excel in non-stick properties, adhere firmly to the substrate and perform effectively when a proper degreasing process (surface preparation) is carried out. * For an overview of the fluoropolymer coating process, please download the PDF or feel free to consult us.
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■Points to Consider for Air Baking - In the case of thin items or precision parts, distortion due to heat treatment can be an issue. - If processing is done without blasting or similar operations in the next step, copper products may develop an oxide film, leading to poor adhesion of coatings. *Note: Even when applying standard fluoropolymer coatings to copper products, measures against oxide films are necessary. - Alloys with low melting points may deform due to heat treatment. - For quenching steel, the tempering temperature may result in annealing. Air baking is performed during the degreasing process, and by considering these points, appropriate degreasing treatment can be applied to various products.
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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.