Phenolic cotton cloth laminated sheets are made of cotton cloth impregnated phenolic resin by processing under heat and pressure.
3025: High mechanical applications, suitable for using as insulation structural parts of machinery and electric equipments that require high electrical properties., available in transformer oil.
3025B, 3025C are similar to 3025, but with lower properties.
Nominal dimension: 1020× 2040mm; 1220× 2440mm
Thickness: 0.5 ~ 100mm
| No. |
Item |
Units |
Vlaue |
| 3025 |
3025B |
3025C |
3026 |
3027 |
| 1 |
Applicable Standards |
— |
JB886-75 |
QB |
JB1979-75 |
JB2182-77 |
| 2 |
Density |
g/cm³ |
1.30-1.45 |
1.30-1.45 |
1.30-1.45 |
1.30-1.50 |
1.30-1.42 |
| 3 |
Tensile strength |
MPa |
63.7 |
|
|
68.6 |
58.8 |
| 4 |
Bending strength |
MPa |
102.9 |
90 |
70 |
117.6 |
88.2 |
| 5 |
Impact strength |
kJ/m² |
25 |
|
20 |
30 |
20 |
| 6 |
Bonding strength |
N |
5390 |
5000 |
5000 |
|
5390 |
| 7 |
Pressing strength ≥
Perpendicular to lamination
Parallel to lamination |
MPa |
—
— |
—
— |
—
— |
245
147 |
—
— |
| 8 |
Insulation resistance
Under normal conditions
Impregnated in water |
Ω |
—
— |
—
— |
—
— |
—
— |
1× 1010
1× 107
|
