Welcome to visit the website of HJ Polymer China Co., Ltd. ---Semi-conductive Compound for HV power cable
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Welcome to visit the website of HJ Polymer China Co., Ltd. ---Semi-conductive Compound for HV power cable
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. Semi-conductive Compound for HV power cable. We've also established a graduate workstation with Jiangsu University of Science and Technology, promoting integrated industry-academia collaboration.
Established In
Factory Area
Annual Production Capacity
Employees
As a High Voltage Cable Semi-conductive Shield Compound Suppliers manufacturer, we match product configuration to the application, operating limits, interfaces and acceptance criteria defined for each project.
HJ Polymer China Co., Ltd. is a pioneering manufacturer of high-performance semi-conductive shielding materials for power cables. Since 2002, we have specialized in the R&D and production of compounds that control electric field distribution in XLPE-insulated cables rated 110kV and above. Our HV Cable Shield Compound range is engineered to meet the demanding requirements of high-voltage transmission systems, ensuring uniform electric fields, low partial discharge, and long-term insulation reliability.
With an annual production capacity of 62,000 tons across 13 dedicated lines, we supply cable manufacturers worldwide with materials that replace imported products from global suppliers. Our compounds are used in power transmission, renewable energy, rail transit, and industrial applications where electrical stability is critical.
We offer a focused portfolio of semi-conductive compounds for high-voltage cable conductor and insulation shielding. Each grade is formulated to balance volume resistivity, cleanliness, and processing behavior on modern extrusion lines.
A super clean and smooth compound designed for both conductor and insulation shielding in HV power cables. It provides a stable conductive network with controlled volume resistivity and minimal contamination, reducing the risk of insulation breakdown.
View HJ0901 detailsA flame-retardant conductive sheath compound for high-voltage cables, combining electrical conductivity with fire safety. Suitable for applications requiring both shielding and flame resistance.
View HJ0281 detailsFor medium-voltage and low-voltage applications, we also supply LV/MV Cable Shield Compound and MV Cable Conductor Shield Compound, covering the full spectrum of power cable shielding needs.
High-voltage cable conductor shielding material is a functional semi-conductive compound used in XLPE-insulated cables rated 110kV and above. Its primary role is to form a stable electric field transition zone between the conductor and the insulation layer, preventing local electric stress concentration and ensuring uniform field distribution. The carbon black particles in the compound are highly evenly distributed, creating a stable conductive network that maintains volume resistivity within a strictly controlled range (typically 10–100 Ω·cm). This balance is essential for reducing corona and partial discharge, which directly affect cable life and safety.
Our compounds are formulated to meet the cleanliness requirements of high-voltage applications. Raw materials are highly refined, and metal ion and particle contamination are controlled to avoid insulation breakdown caused by tip electric fields. This makes our HV Cable Shield Compound suitable for demanding projects in power transmission, offshore wind, and underground cabling.
When preparing a proposal, we consider the following parameters to match the compound to your cable design and production process.
| Parameter | Typical Range / Options | Considerations |
|---|---|---|
| Volume Resistivity | 10–100 Ω·cm | Lower values improve shielding but may affect processing. |
| Base Polymer | EVA, EEA, or custom blends | Compatibility with insulation and sheath materials. |
| Carbon Black Content | Optimized for conductivity and smoothness | High structure blacks for stable network. |
| Contamination Level | Super clean grades available | Critical for 220kV and above. |
| Processing Method | Extrusion, triple-head co-extrusion | Smoothness and die swell characteristics. |
Our R&D team includes PhDs and senior engineers actively involved in national and industry standards, ensuring our compounds align with evolving technical requirements. We collaborate with cable manufacturers to tailor formulations for specific line speeds, insulation thicknesses, and voltage classes. Whether you need a standard grade or a customized solution, we provide technical data and samples to support your qualification process.
We understand that high-voltage cable production demands consistency. Our automated process control systems and rigorous quality management ensure batch-to-batch stability. We also offer guidance on extrusion parameters and troubleshooting to help you achieve optimal results.
HJ Polymer operates under a certified quality management system, and our products comply with UL, IEC, GB, and other international standards. We hold 3 authorized invention patents and 40 utility model patents, reflecting our commitment to innovation. Our compounds are halogen-free and RoHS compliant, supporting environmental sustainability. For each order, we provide certificates of analysis and can arrange third-party testing upon request.
To recommend the most suitable HV Cable Shield Compound and provide an accurate quotation, we need the following project details:
Our technical team reviews these inputs and proposes a grade from our Power Cable Shield Compounds portfolio, or develops a custom formulation if needed.
What is the typical volume resistivity of your HV cable shield compounds?
Our compounds are formulated to achieve volume resistivity within the 10–100 Ω·cm range, depending on the specific grade and application requirements. We can fine-tune the formulation to meet your target values.
Do you provide samples for qualification?
Yes, we provide samples for cable manufacturers to evaluate on their production lines. Our technical team supports the trial with processing recommendations.
What is the lead time for orders?
Standard lead time is approximately one week, subject to order quantity and current production schedule. We maintain a monthly capacity of 5,200 tons to ensure timely delivery.
Can you customize the compound for our specific cable design?
Yes, we offer customized solutions. Our R&D team works with you to adjust properties such as conductivity, mechanical strength, and processing behavior to match your line and cable specifications.
What certifications do your products hold?
Our products comply with UL, IEC, GB, and other international standards. We operate under a certified quality management system and can provide relevant documentation.
How do you ensure batch-to-batch consistency?
We use automated process control systems and rigorous quality testing at multiple stages of production. Each batch is tested for volume resistivity, cleanliness, and mechanical properties before shipment.
