Flame Retardant Polyethylene Sheath
Product Name, Model Type and Usage
| Product Model |
Product Name |
Characteristics And Uses |
|---|---|---|
|
SH8501 |
Flame retardant polyethylene sheath |
Excellent cracking resistance, good processing performance; Used for high voltage cables, control cables, optical cables, etc. |
Product introduction
SH8501 is a kind of flame retardant cable material based on polyethylene and added with environmental halogen (low halogen) flame retardant. It has high flame retardant efficiency, good self-extinguishing property, excellent mechanical properties and crack resistance. It is suitable for sheath of ultra-high voltage cable, power cable, control cable and optical cable. It is also suitable for insulation and weatherability of power cables. It can also be made into "FY" according to user's requirements, plus the model "FYSH8501".
Product characteristics
·Excellent mechanical properties ·Excellent processing performance
·Excellent environmental stress cracking resistance ·Excellent Weather Resistance and Insulation
·Excellent flame retardancy ·Special material for 110KV cable
Processing Guide
The optimum extrusion effect can be obtained by using ordinary PE screw with a length-diameter ratio of 25:1. The drawing ratio of the die should not be too large during extrusion. The warm water-cold water cooling is adopted to minimize the internal stress of the sheath.
Recommended Processing Temperature：
| position | 1area | 2area | 3area | 4area | 5area | 6area | 7area | 8area | nose | die port |
|---|---|---|---|---|---|---|---|---|---|---|
| temperature（℃） | 150 | 160 | 165 | 165 | 168 | 170 | 170 | 173 | 173 | 172-2180 |
The melt temperature is controlled between 170 and 180 C.
If the material is stored in humid environment for a long time, drying treatment is recommended. The drying temperature is 80 C and the drying time is 1 - 2 hours.
Storage and Packaging
It should be stored in a dry and ventilated warehouse. The products are packed in 25kg paper-plastic composite bags or 500kg container bags. They can also be packed according to user's requirements.
Technical characteristics（Termite Control Model：FYSH8501）
| physical property |
unit |
standard value |
SH8501 Typical Value |
test method |
|---|---|---|---|---|
|
density |
g/m3 |
≤1.35 |
1.21 |
GB/T 1033.1 |
|
low temperature impact embrittlement temperature |
℃ |
-35 |
pass |
GB/T 5470 |
|
thermal deformation90℃×4h |
% |
≤50 |
pass |
GB/T 8815 |
|
resistance to environmental stress cracking |
h |
≥500 |
pass |
GB/T 2951.41 |
|
|
|
|
|
|
|
mechanical properties |
unit |
standard value |
SH8501 typical value |
test method |
|
tensile strength |
MPa |
≥12.5 |
13.8 |
GB/T 1040.3 |
|
elongation at break |
% |
≥400 |
560 |
GB/T 1040.3 |
|
|
|
|
|
|
|
aging test |
unit |
standard value |
SH8501 typical value |
test method |
|
thermal aging 100℃×240h |
|
|
|
GB/T 2951.12 |
|
tensile strength change rate |
% |
±25 |
-9 |
|
|
fracture elongation change rate |
% |
±25 |
+1.3 |
|
|
|
|
|
|
|
|
electrical performance |
unit |
standard value |
SH8501 typical value |
test method |
|
20℃ volumetric resistivity |
Ω·m |
5×1012 |
1.2×1013 |
GB/T 1410 |
|
dielectric strength |
KV/mm |
≥18 |
27 |
GB/T 1408.1 |
|
|
|
|
|
|
|
flame retardant property |
unit |
standard value |
SH8501 typical value |
test method |
|
oxygen index |
% |
≥27 |
28.5 |
GB/T 2406 |
|
|
|
|
|
|
|
melting index |
g/10min |
≤1.0 |
0.45 |
GB/T 3682 |
|
|
|
|
|
|
|
termite control (colony method) |
erosion grade |
＜2 level |
pass |
|
Note: The data of typical values in the table can not be regarded as the standard of specification restriction or the design basis cited separately.
