Complaint
MDPE Protecting cover granular
The black medium density polyethylene sheathing compound MDPE is formed by synthetically improving polyethylene with special
base material formula and a variety of additives, so as to adapt to different requirements on cables. It can be used in production of opticalcable sheath, insulation of overhead cable, and in other environments imposing stringent requirement on protective layer strength andwearability.
| Performance | Unit | HDPE | MDPE | LLDPE |
| Fusant flow rate | g/10min | ≤2.0 | ≤2.0 | ≤2.0 |
| Density | g/cm3 | 0.955~0.978 | 0.940~0.955 | ≤0.940 |
| Tensile strength before aging | Mpa | ≥20.0 | ≥17.0 | ≥14.0 |
| Elongation at break before aging | -- | ≥650% | ≥600% | ≥600% |
| Tensile strength after aging | Mpa | (110±2)ºC,240h,≥20.0 | (110±2)ºC,240h,≥16.0 | -76ºC,3min,maximum cracking quantity/test sample quantity:15/30 |
| Elongation at break after aging | -- | (110±2)ºC,240h,≥650% | (110±2)ºC,240h,≥500% | 500h,failure quantity/test sample quantity0/10 |
| Low temperature impact catalytic | individual | -76ºC,3min,maximum cracking quantity/test sample quantity:15/30 | -76ºC,3min,maximum cracking quantity/test sample quantity:15/30 | / |
| Resistance to environment stress cracking | individual | 500h,failure quantity/test sample quantity0/10 | 500h,failure quantity/test sample quantity0/10 | / |
| Oxidation induction time | min | ≥30 | ≥30 | ≥30 |
| Black carbon cantent | -- | (2.60±0.25)% | (2.60±0.25)% | (2.60±0.25)% |
| Black carbon dispersity | level | ≤3 | ≤3 | ≤3 |
| Dielectric strength | KV/mm | ≥25 | ≥25 | ≥25 |
| Volume resistance | Ω·m | ≥1*1014 | ≥1*1014 | ≥1*1014 |
| Dielectric constant | -- | ≤2.75 | ≤2.75 | ≤2.80 |
Since 1989, Mr. Yang Xuehong, the founder of Shuangxin new materials and his core team have been engaged in the new material industry.
