Type and application
|
Type |
Product |
Application and advantages |
|
MDPE6608 (Virgin) |
Virgin black MDPE jacket material |
Used for the outer sheath of high standard and high requirement optical cable, it has the advantages of stable testing performance,excellent processing performance, smooth and delicate surface of products, etc. It can completely replace imported and petrochemical products of the same type. |
|
HDPE8807 (Virgin) |
Virgin black HDPE jacket material |
Product description
PE virgin sheathing material is made of virgin high molecular polyethylene as the main raw material, adding various additives, modified by blending, extruded and granulated by twin-screw extruder. The performance indexes can reach the standard of GB/T15065-2009 and YD/T 1485-2006. It has excellent processability of processing, mechanical and physical properties and electrical properties.
Processing technology
It is recommended that virgin PE sheath material should be processed with extruder having a minimum L/D ratio of 25. In the extrusion process, the production speed should be reduced and the plasticization should be ensured. It is best to dry before extrusion, and the maximum drying temperature is 100 °C. It is recommended to set the temperature (°C) of each zone of the extruder as follows:
|
Zone |
Zone1 |
Zone2 |
Zone3 |
Zone4 |
Zone5 |
Flange |
Die |
|
Temperature ℃ |
190 |
200 |
240 |
255 |
245 |
240 |
240 |
Note: The above process parameters are for reference only. The specific temperature is related to the matching degree of equipment and materials. Corresponding adjustments should be made according to the surface conditions of the extruded materials. The cooling water tank should be used sectionally cooling with warm-water echelon in order to reduce internal stress.
Storage and transport
Packaging: 500 kg, 750 kg, 900 kg polyethylene bag inside and outside woven bag for big package, or 25 kg paper-plastic composite for small package.
Transportation: The product should not be exposed to sunlight, rain or damp during transportation, and keep the packaging intact.
Storage: Please store in clean, cool, dry and ventilated warehouse; keep away from fire sources; if it was affected with damp, please dry under 80℃ ±5℃ for 1 to 2 hours.
Properties
|
Item |
Unit |
Spec |
Test method |
|
|
MDPE6608 (Virgin) |
HDPE8807 (Virgin) |
|||
|
Melt Flowing Index(190℃，2.16Kg) |
g/10min |
≤1.5 |
GB/T 3682 |
|
|
Density(23±0.5)℃ |
g/cm3 |
0.940-0.955 |
0.955-0.978 |
GB/T 1033.1 |
|
Tensile Strength(50mm/min) |
MPa |
≥24 |
≥28 |
GB/T 1040 |
|
Elongation at Break |
% |
≥800 |
≥850 |
GB/T 1040 |
|
Change rate of tensile strength after thermal aging |
% |
≤20.0 |
GB/T 2951.12 |
|
|
Change rate of elongation at break after thermal aging |
% |
≤20.0 |
GB/T 2951.12 |
|
|
Low temperature impact embrittlement temperature(-76℃) |
℃ |
Pass |
GB/T 5470 |
|
|
Dispersity of Carbon Black |
Scatter |
≤3 |
GB/T 18251 |
|
|
Carbon Black Content (Direct Combustion Method) |
% |
2.6±0.25 |
GB/T 2951.41 |
|
|
Resistance to Environmental Stress Crack F0 |
h |
≥500 |
GB/T 2951.41 |
|
|
200℃ Oxidative Induced Time |
min |
≥60 |
GB/T 2951.42 |
|
|
Volume Resistivity |
Ω.m |
≥1×1014 |
GB/T 1410 |
|
|
Dielectric Strength |
KV/mm |
≥25 |
GB/T 1408.1 |
|
|
Dielectric Constant |
/ |
≤2.75 |
GB/T 1409 |
|
|
Shore hardness |
D（15s） |
≥53 |
≥55 |
GB/T 2411 |
Note: The samples were prepared according to the test method of GB/T9352 thermoplastic plastic specimen.