1.Description:
This material is a kind of crosslinkable polyethylene insulation compound. It is made of high quality PE resin, dicumyl peroxide agent and antioxidant agent by plasticizing granulation. Production process uses the closed system; Loss-in-weight Feeder which guarantees stable precision of components. It has stable physical and chemical index and good processing property.
Application: 35kV crosslinkable cable insulation; Maximum working temperature is 90ºC.
2.Technical Parameters:
|
Item |
Unit |
Test method |
Typical value |
|
|
Density@23ºC |
g/cm³ |
ASTM D792 |
0.92±0.01 |
|
|
Tensile strength |
MPa |
IEC 60811-1-1 |
22.5 |
|
|
Elongation at break |
% |
540 |
||
|
Impact embrittlement performance@-76ºC |
Failure number |
Piece |
ASTM D746 |
0/30 |
|
After aging |
Tensile strength variation |
% |
IEC 60811-1-2 |
+4 |
|
Breaking elongation variation |
% |
-4 |
||
|
Hot prolongation@200ºC, 0.2MPa, 15min |
Elongation under the load |
% |
IEC 60811-2-1 |
60 |
|
Permanent deformation |
% |
0 |
||
|
Dielectric dissipation factor@20ºC, 50HZ |
- |
IEC 60250 |
1×10-4 |
|
|
Relative dielectric constant@20ºC, 50HZ |
- |
2.25 |
||
|
Dielectric strength@20ºC |
MV/m |
IEC 60243-1 |
40 |
|
|
Volume resistivity@20ºC |
Ω·m |
IEC 60093 |
1×1015 |
|
|
Gel content |
% |
ASTM D2765 |
86 |
|
2.1.Impurity content
|
Impurities Particle Size |
Number of particles C1 |
Number of particles C2 |
|
0.12~0.25 |
6 |
10 |
|
0.26~0.50 |
1 |
2 |
|
0.51~1.00 |
0 |
0 |
|
>1.00 |
0 |
0 |
Particles number C2, unqualified.
3.Processing
Recommend to use conventional extruder (three layers co-extrusion, draw ratio is from 20:1 to 30:1) and other equipments need to be adjusted according to the circumstance.
|
Zone |
Feeding Section |
Compression Section |
Homogenization Section |
Model Section |
|
Temperature RangeºC |
90-100 |
100-110 |
105-115 |
110-120 |
Above temperature is only for reference.
4.Storage
keep at room temperature; Storage environment should be clean, dry and ventilated; Best use within six months from the date of production.
5.Product packing
500kg in each package; Inner lined with plastic sealed film bag; Corrugated carton with tray at the bottom.
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