Epoxy glass mat laminated sheet
Characteristics and application: It is made of E-glass mat impregnated thermal proof resin, through heated and pressed. Having high mechanical strength and good electrical property.
Standard: IEC60893-3-4:2003
Table 1: The technical requirements
|
Item |
Unit |
Normal value |
|
Flexural strength perpendicular to the layer direction |
MPa |
≥320 |
|
T150≥160 |
|
Impact strength parallel to the layer direction |
kJ/m2 |
（Charpy method ）≥50 |
|
（Izod method）≥55 |
|
Breakdown voltage parallel to the layer direction at 90℃ oil |
kV |
≥35 |
|
Electrical strength perpendicular to the layer direction at 90℃ oil |
MV/m |
Refer to table 2 |
|
Insulation resistance after immersed in water |
Ω |
≥5.0×109 |
|
Water absorption D-24/23 |
% |
Refer to table 3 | Table 2: Electrical strength perpendicular to the layer direction
|
Thickness
mm |
Normal value
MV/m |
Thickness
mm |
Normal value
MV/m |
|
1.4 |
12.3 |
2.4 |
9.8 |
|
1.5 |
12 |
2.5 |
9.6 |
|
1.8 |
11 |
2.6 |
9.4 |
|
2 |
10.5 |
2.8 |
9.2 |
|
2.2 |
10 |
3 |
9 | Note:1. Electric strength perpendicular to layer direction at 90±2℃ oil can optional choose one 20s raising voltage class by class and the requirement of voltage resistance test for 1 min. If the material is conform with one of the both methods, the electric strength shall be considered to be also conform with the standard.
2. If the arithmetic average of the sample thickness is between the both thicknesses listed in the above table, its requirement value shall use the interpolation method to get. If the average is below 0.4mm,the requirement value of electric strength shall use the one of 0.4mm, If the normal thickness is 3mm and the average of the sample thickness is over 3mm,the requirement value of 3mm shall be used.
Table 3: Water absorption
|
Mean thickness |
Max. water absorption |
Mean thickness |
Max. water absorption |
|
mm |
mg |
mm |
mg |
|
1.5 |
25 |
10 |
40 |
|
2 |
26 |
12 |
44 |
|
2.5 |
27 |
14 |
48 |
|
3 |
28 |
16 |
55 |
|
4 |
29 |
20 |
60 |
|
5 |
31 |
25 |
70 |
|
6 |
33 |
22.5 |
90 |
|
8 |
35 |
|
| Note: 1. If the arithmetic average of the sample thickness is between the both thicknesses listed in the above table, its requirement value shall use the interpolation method to get.
2. If the average is below 0.4mm, the requirement value of water absorption shall use the one of 0.4mm. If the normal thickness is 25mm and the average of the sample’s thickness is over 25mm,the requirement value of 25 mm shall be used. If the thickness of the laminates is 25,it shall be processed to 22.5±0.3mm by one-side frame and the surface shall be smooth |
