High Voltage Cable Filler
DL-500 high voltage cable filler is widely used in optical cable, high voltage, EHV XLPE cable, local communication cable,capacitor, etc.
Water blocking, low density, low acid value, corrosion resistance, excellent electric properties, and excellent oxidation resistance and resistance to fungal growth .
Main Technical Parameters
Density @ 20°C (g/ml)
Flash point (°C)
@ 25°C (dmm)
@ -40°C (dmm)
ASTM D 217
ASTM D 217
Viscosity @ 10 1/S 25°C (Pa.s)
CR Ramp 0-121/s
Oil seperation @ 80°C / 24 hours (Wt %)
Volatility @ 80°C / 24 hours (Wt %)
OIT@ 190°C (min)
Acid value (mg KOH/g)
Relative dielectric constant @ 50Hz, 23°C
Volume resistivity @ 20℃ (Ω.cm)
Dielectric power factor （1MHz）
Breakdown voltage （KV）
Expansion coefficient （℃-1）
Test with customers
DL-500 high voltage cable filler is well compatible with high polymer.But we recommend that the compatibility test should be made before high polymer materials are in contact with the compound.
DL-500 high voltage cable filler is designed for cold filling.
30% deposit ,70% balance should be paid before shipment.
20’GP : witnin 7 working days after receiving the deposit.
40’GP : within 10 working days after receiving the deposit.
Three major technologies to extend the life of optical cables
The optical fiber and cable industry has experienced more than 30 years of development, and now it has entered a peak period of replacement. As a result, the topic of the life of optical cables is also attracting attention in the industry. Because the external environment and internal quality of the optical fiber cable are different during the actual use, the lifetime problem is more complicated. At present, the industry has proposed three major technical points that affect the life of optical cables.
First, fiber coating material selection and drawing process
The main reasons for the increase of optical fiber loss include hydrogen loss, fiber cracking, and fiber stress. After actual detection, the optical fiber in the optical fiber cable has undergone many years of use. Its geometric properties, mechanical properties, connection properties, optical properties and other macro properties have not changed substantially. By scanning electron microscopy and other methods, it was found that the optical fiber did not have any obvious abnormal phenomena such as microcracks. However, there are significant differences in the coating conditions of optical fibers. The attenuation of 1550 nm and 1310 nm wavelengths increases significantly for optical fibers with high modulus, tight coating, and large peel force.
Second, grease filled design
Fibres are oily substances that are in close contact with optical fibers and are based on mineral oil or synthetic oil-based mixtures that act as a barrier to water vapour and lubrication of the fiber. The properties of the ointment are evaluated by visually observing the morphology and measuring the oxidation-inducing period of the ointment. Oxidation of ointment can increase the hydrogen evolution after oxidation. At the same time, the oxidation of ointment has an effect on the stability of the cable structure, resulting in a decrease in the yield stress. Thus, the optical fiber is affected by vibration, impact, bending, temperature change, and topography and geological changes. It is subject to stress, weakening the buffering effect of the fiber cream on the optical fiber, thereby reducing the reliability of the optical cable.
The fiber paste is in direct contact with the fiber, which is the most important indirect cause of degradation of the fiber's performance.
Through the actual detection of optical cables in use at different times, it has been found that the denaturants slowly degenerate with time. Usually it is first assembled into small particles and then gradually volatilized, decomposed and dried. For the direct burial or optical fiber cable in Central China, the typical time for the degeneration of the fiber paste to begin is 18 years.
Third, loose tube size
The effect of the size of the loose tube on the life of the cable is more reflected in the comprehensive stress. When the size is too small, under the changing factors such as temperature change, mechanical stress, and the interaction between the filler and the optical fiber, the stress experienced by the optical fiber is not relieved, so that the attenuation of the optical fiber increases and an aging phenomenon occurs.