HJ0304 Semi-conductive Conductor Shielding for MV Power Cables [Fast Line Speed Grade]-HJ Polymer China Co., Ltd.

HJ0304 Semi-conductive Conductor Shielding for MV Power Cables [Fast Line Speed Grade]

This product is a cross-linked semi-conductive conductor shielding material specially developed for high-speed, large-section medium-voltage cable extrusion process. It is suitable for extruded insulated cable systems with rated voltage not exceeding 36kV. This material is particularly suitable for CCTV high-speed lines. It can support line speeds up to 10 meters/minute and cable cross-sections up to 500mm², fully meeting the needs of modern high-efficiency and mass production.
It can easily cope with the processing needs of cable conductors up to 500mm², and can still form a conductor shielding layer with a smooth surface and dense structure at high speed, improving the overall shielding effect and durability.
Adding high-efficiency thermal stabilizers and antioxidant systems ensures the material's anti-scorching performance during high-temperature and high-speed extrusion, significantly reduces the risk of die coking and carbonization, and extends the mold change cycle.
Specially adding anti-copper oxidation additives can effectively avoid the oxidation reaction of copper conductors during extrusion and cross-linking, improve the adhesion of the shielding layer and the service life of the cable.

Physical Properties	Test Method	Unit	TypicalValue
Density, 23℃	ASTM D1505	g/cm³	1.14
Tensile Strength	ASTM D638	MPa	13
Elongation at Break	ASTM D638	%	200
After Oven Aging, 168hrs at 136℃	ASTM D638
Tensile Strength		%	≥85
Elongation at Break		%	≥85
Hot Set Test, 200℃, 0.2MPa, 15min	IEC540
Elongation under Loading		%	50
Permanent Deformation after Cooling		%	8
Moisture Content	Karl Fisher	ppm	400
BritlenessTemperature	ASTM D746	℃	-45
Electrical Properties
DCVolume Resistivity at
20℃	ASTM D991	Ω.cm	50
90℃		Ω.cm	500

1. Temperature Setting of Extruder:
a

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.

HJ0304 meets the applicable requirements as below when processed using sound extrusion practices and testing procedures.
-AEIC CS 7 and CS 8
-IEC 60840
-IEC 60502
-ICEA S-66-524/NEMA WC 7
-UL 1072

HJ0304 is specially designed for high speed CCTV line, it is verified that the wire speed can achieve 10m/min for processing the cable 500 mm².
HJ0304 is a cross-linkable semi-conductive shielding compound, it's designed for bonded conductor shielding compound 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
HJ0304 has excellent compatibility with copper conductor without copper-oxidation by adding special accessory ingredient.

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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HJ0304 Semi-conductive Conductor Shielding for MV Power Cables [Fast Line Speed Grade]

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