It has high mechanical strength, good insulation, heat resistance and corrosion resistance, so it is often used in the manufacture of electrical materials, such as switches, lamp holders, earphones, phone cases, instrument cases, etc.
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Epoxy fiberglass laminated sheet 3240
Parts of fr-4 and fr-5
Phenolic cotton cloth laminated sheet parts
Bakelite (Pheonlic paper laminated sheet) 3021