Phenolic Resin Laminated Sheets
Phenolic resin laminated sheets have been used for various purpose in large quantity. As base material, we use paper, cotton, and glass fiber cloth, depending on the final use and purpose. Since phenolic resin is superior to others in heat resistance, its laminated sheet is hard and stable against every solvent and acidic chemicals, and it is a well balanced electric insulator in terms of its electrical properties, mechanical properties, processing properties and cost performance. Especially, phenolic resin laminated sheets made with cotton are excellent in terms of machinery workability and impact strength. These products have a wide range of applications in such areas as electric equipment and machine parts (e.g. starters, gears).
Epoxy Resin Laminated Sheets
Generally, epoxy resin has excellent insulation performance, moisture resistance, dimensional stability, chemical resistance, adhesion properties, and especially alkaline resistance. Products made with glass fiber cloth come in two type: normal (G-10) and flame resistant (FR-4). Both types have excellent mechanical strength, electrical performance, low water absorption and chemical resistance. The products made with carbon cloth have excellent strength and elasticity; while the products made with tetron cloth have excellent water resistance, high frequency dependence, punching quality, abrasion resistance SF6 gas resistance. They have applications such as electric equipment and heavy electric machinery (e.g. transformers, dynamos).
Melamine Resin Laminated Sheets
Melamine resin has excellent water resistance, chemical resistance and weatherproof properties, and its surface is so hard that it is difficult to scratch. Melamine resin also has excellent flame resistance, arc resistance and tracking resistance since it contains a higher proportion of nitrogen than other sheets. It has applications with arcing electrical parts such as vehicular arc chutes and breakers.
Inorganic Resin Laminated Sheets
Inorganic resin laminated sheets are glass fiber laminated sheets made with inorganic material. They insulate up to 300°C and above, and can even reach 800°C in certain situations. Additionally, they have excellent arc resistance and tracking resistance. In spite of the inorganic base, they are superior to conventional inorganic materials (e.g. ceramics, mica) in terms of workability, and can be used just like organic resin laminated sheets made with glass fiber cloth.
Polyimide Resin Laminated Sheets
Polyimide resin developed for space aeronautics is being applied many areas such as the electronics industry and consumer goods. These products are stable at high temperatures, and have excellent electric properties, abrasion resistance, radiation resistance, and chemical resistance. They can be used for the mechanical parts of drug solution tanks, nuclear power plant equipment, and class H wedges of motors, because of its reliability at high temperatures.
Silicone Resin Laminated Sheets
Silicone resin can be used as an H-class insulator because of its excellent heat resistance, low temperature resistance, incombustibility, water resistance, and electrical insulation properties. The glass fiber cloth base materials makes the most of these features. It shows little change in electric resistance in relation to temperature, and it has excellent arc resistance and high frequency properties. It can be used as an insulator in heaters, microwave ovens, circuit breakers and outside insulators.
Glassmat Laminated Sheets
Glassmat laminated sheets are made with chopped strand mats, which are VA product, less expensive than glass fiber cloth. These products contain two types of resin, such as unsaturated polyester and epoxy, along with added inorganic filler. They are used as a general electrical insulator, especially in heavy electric machinery parts because of their excellent arc resistance and tracking resistance.


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