Epoxy plates for commutators
Epoxy mica plates for commutators are hard plate-type insulating materials in which epoxy adhesive is used to bond mica papers and then bake them accordingly. They have high mechanical strength and good thickness uniformity and are mainly suitable for insulation between commutators’ copper plates in Class F DC motors and used as insulating liners for other electrical machines and appliances.
Parameters
|
Properties
|
Muscovite epoxy plates
|
Phlogopite epoxy plates for commutators
|
|
Model
|
5536-1
|
5536-1P
|
|
Adhesive
|
Epoxy
|
Epoxy
|
|
Mica content
|
90%－93%
|
90%－93%
|
|
Adhesive content
|
7%－10%
|
7%－10%
|
|
Thickness（mm）
|
0.4-2
|
0.4-2
|
|
Thickness error (mm)
|
Average
|
±0.02
|
±0.02
|
|
Point
|
±0.03
|
±0.03
|
|
Density (g/cm3)
|
2.4±0.2
|
2.4±0.2
|
|
Extension and contraction rate (％)
|
Flexible extension and contraction rate
|
≤２
|
≤２
|
|
Plastic extension and contraction rate
|
≤2.5
|
≤2.5
|
|
Flexural strength（kgf/m㎡
|
﹥30
|
﹥30
|
|
Breakdown voltage（KV/mm）
|
﹥20
|
﹥20
|
|
Temperature without mica displacement and plastic particle precipitation (℃)
|
300
|
300
|
|
Standard size (mm)
|
1000*600,1000*1200
|
|
Testing standards
|
IEC371
|
