Glass Cloth Laminates Glass cloth laminate is manufactured by fiberglass cloth impregnated with resin, pressed at high temperature and high pressure into plate.
Type
Type
Name
Application
V3240
Epoxy phenolic glass cloth laminates
Its thermal class is B. It has higher mechanical and dielectrical properties as well as good moisture resistance, which is used as insulating structural parts for motors and electrical equipments. And also in transformer oil and moisture conditions.
V348
Epoxy glass cloth laminates
Its thermal class is F, with high mechanical strength, flame retardancy and stable electric property at high temperature. No burrs after shearing, drilling and milling at room temperature. Used as special insulating structural parts for aeronautics, marine and military.
V350
Diphenyl ether glass cloth laminates
Its thermal class is H,with excellent mechanical strength,electrical property and erosion resistance.Used as insulating structural parts for motors,apparatures as well as electronic industry.
V357
Modified BMI glass cloth laminates
Its thermal class is H,with excellent electrical property and thermal resistance.Used as insulating structural parts for grade H motors,apparatures.
V3253
Poly(amino-imide) glass cloth laminates
Its thermal class is H, with good mechanical and electrical properties,higher humidity resistance and machining property.Used as heat resistant insulating structural parts, such as slot insulating ,cushion for motors, and shoring bar,cushion and connection board for dry transformers.
Technical requirements
No.
Item
Unit
Value
V3240
V348
V350
V357
V3253
1
Density
g/cm3
1.7～1.9
1.85
1.7～1.9
≥1.7
1.7
2
Flexural strength perpendicular to layers
At room temp.
MD
MPa
≥340
≥350
≥500
≥400
≥400
TD
-
At thermal temp.
MD
－
≥175 150±2℃
≥320 180±2℃
≥280 180±2℃
≥280 180±2℃
TD
－
－
－
－
3
Impact strength parallel to layers(charpy type)
KJ/m2
≥33
－
≥42
－
≥50
4
Bonding strength
N
－
－
-
4900
－
5
Volume resistivity
At room temp.
MΩ·m
－
－
－
≥1×105
－
After soaking into water
≥1×103
At thermal temp
≥1×103（180±2℃）
6
Insulation resistance parallel to layer direction
At room temp.
MΩ
≥5×102
≥5×104
-
≥5×104
≥5×102
After soaking into water
≥1×102
≥5×102
At thermal state
－
－
7
Relative Permittivity
48-62Hz
－
≤5.5
－
－
－
－
1MHz
－
≤5.5
≤5.5 After soaking into water
≤3
－
≤5.5After soaking
8
Dissipation factor
48-62Hz
－
≤0.04
－
≤0.05
－
1MHz
－
≤0.04
≤0.04 After soaking into water
≤0.05
－
≤0.03 After soaking into water
After being humidified
At thermal Temp.
9
Breakdown voltage parallel to layer direction,at 90±2℃ in transformer oil for 1 h.
kV
≥35
－
≥35
－
－
10
Voltage resistance parallel to layer direction, at 90±2℃ in transformer oil for 1 min.
