Phenolic
Resin Laminated Sheets
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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).
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Epoxy
Resin Laminated Sheets
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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).
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Melamine
Resin Laminated Sheets
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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.
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Inorganic
Resin Laminated Sheets
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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.
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Polyimide
Resin Laminated Sheets
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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.
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Silicone
Resin Laminated Sheets
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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.
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Glassmat
Laminated Sheets
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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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