HJ0305 Semi-conductive Conductor Shielding Compound for MV Power Cables [Copper oxidation resistance Grade]-HJ Polymer China Co., Ltd.

HJ0305 Semi-conductive Conductor Shielding Compound for MV Power Cables [Copper oxidation resistance Grade]

Bonded semi-conductive conductor shield is a cross-linked semi-conductive conductor shield composite material designed for medium voltage extruded insulated power cables, with a rated voltage of up to 36kV. Its biggest feature is that it has excellent copper conductor oxidation resistance and is suitable for dry high-temperature vulcanization processing. By adding special antioxidant additives, it can not only effectively prevent the surface oxidation of the copper conductor, but also significantly inhibit the secondary oxide layer of the copper conductor, greatly improving the durability and stability of the cable.
This material is suitable for dry vulcanization process, can form a stable cross-linked network at high temperature, improve the thermal stability and mechanical toughness of the shielding layer, and ensure long-term reliable operation of the cable.
The volume resistivity is stable and uniform, ensuring uniform electric field distribution, reducing the risk of local electrical stress concentration, and improving the overall safety performance of the insulation system.

Physical Properties	Test Method	Unit	Typical Value
Density,23℃	ASTM D1505	g/cm³	1.14
Tensile Strength	ASTM D638	MPa	12
Elongation at Break	ASTM D638	%	200
After Oven Aging,168hrs at 136℃	ASTM D638
Tensile Strength Retention		%	≥85
Elongation at Break Retention		%	≥85
Hot Set Test,200℃,0.2MPa,15min	IEC540
Elongation unde Loading		%	50
Permanent Deformation ater Cooling		%	8
Moisture Content	Karl Fisher	ppm	400
Britleness Temperature	ASTM D746	℃	-45
Electrical Properties
DCVolume Resistivity at
20℃	ASTM D991	Ω.cm	50
90℃		Ωcm	500

1. Temperature Setting of Extruder:

Zone	1#	2#	3#	4#	Tube	Head
Temp. (℃)	85℃	95℃	100℃	110℃	110℃	110℃

Zone	1#	2#	3#	4#	Tube	Head		Feeding、Water Cooling、Screw
Temp. (℃)	80℃	95℃	100℃	110℃	110℃	110℃		65℃

2.It's recommended to use stainless steel wire filter(20×40×20).
3. The above temperature settings are the most typical ones. With different extruder devices, it can be adjusted in terms of the practical situation after extrusion in use, combining with melting pressure and current, in order to achieve the best extrusion result.

HJ0305 meets the applicable requirements as below when processed using sound extrusion practices and testing procedures.
-AEIC CS 7 and CS 8
-ICEA S-66-524/NEMA WC 7
-IEC60502
-IEC60840
-UL1072

HJ0305 is specially designed for copper oxidation resistance.
HJ0305 has excellent anti-copper oxidation effect due to special additive.
Compared with HJ0301, it can not only resist the outer layer of the copper conductor oxidized, but also does a great effect of the secondary outer of layer oxidization.
HJ0305 is a cross-linkable semi-conductive conductor shielding compound, specially designed for semi-conductive conductor of extruded insulated power cables rated voltage up to 36KV.
It is suitable for dry vulcanization processing method at high temperature. It provides fine surface smoothness, nice extrusion flowability, good performance to prevent scorch and stable volume resistivity.

HJ Polymer China Co., Ltd. founded in 2002, specializes in the R&D and manufacturing of high-performance semi-conductive shielding materials for cables. With an annual production capacity of 62,000 tons, the company holds over 40% of the domestic market and exports to Europe, the U.S., the Middle East, and Asia.

Delivery Capacity

HJ Polymer operates 13 dedicated production lines within a 30,000+ m2 facility, utilizing automated process control systems to ensure efficient and stable delivery.

Collaboration

Our R&D team includes PhDs and senior engineers actively involved in national and industry standards. We’ve also established a graduate workstation with Jiangsu University of Science and Technology, promoting integrated industry-academia collaboration.

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HJ0305 Semi-conductive Conductor Shielding Compound for MV Power Cables [Copper oxidation resistance Grade]

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