| EPOXY
GLASS CLOTH LAMINATED SHEETS
| Properties |
Units |
3240 |
3240-1 |
3240F |
| Flexural strength perpendicular to lamination
≥ |
MPa |
340 |
320 |
340 |
| Notch impact strength parallel to lamination charpy ≥ |
KJ/m2 |
33 |
33 |
33 |
| Dielectric strength perpendicular to lamination （in oil 90±2℃）
≥ |
MV/m |
14.2 |
14.2 |
14.2 |
| Breakdown voltage parallel to lamination （in oil 90±2℃）
≥ |
KV |
35 |
30 |
35 |
| Relative dielectric coefficient ≤ |
— |
5.5 |
— |
5.5 |
| Loss factor ≤ |
— |
0.04 |
— |
0.04 |
Insulation resistance after impregnated in
water ≥
|
Ω |
5×108 |
1×108 |
1×108 |
Water absorption
1mm ≤
|
mg |
18 |
18 |
18 |
| Flammability |
— |
— |
— |
FV0 |
| Colour |
— |
Natural |
| Reference standard |
— |
GB/T 1303.1-1998 |
Technical data of
sheet electro technical glass-cloth-base laminate
| Property name |
Standardized property value |
| 1.Density, g/cm3 |
1600-1900 |
| 2.Destruction stress at bending in perpendicular to layers,
MPa, no less than |
35 |
| 3. Destruction stress at tension, MPa, no less than |
220 |
| 4.Toughness on Sharpie in parallel to layers in samples with
a notch, kJ/m2, no less than |
33 |
5.Specific volume electrical resistance, ?m, no less than,
for sheets up to 8.0mm:
a)after conditioning in conditions
24h/238C/93%
|
1.1010 |
| 6. Insulation resistance after conditioning in conditions
24h/238C/distilled water, M?, no less than |
5.104 |
7. Electric strength in perpendicular to layers(one minute
checking test) in conditions M/908C/transformer oil, KV Eff/mm,
no less than at rated thickness
a)0.5
b)1.5
|
16.1
14.2
|
| 8.Puncture voltage in parallel to layers (one minute checking
test) in conditions M/908C/transformer oil , KV Eff/mm, no less
than at rated thickness |
35 |
9.Water absorptivity, mg, at thickness of samples, mm:
a)0.5
b)1.5
|
58
71
|
|
