Procurement Guide for Semi-conductive Water Blocking Tape

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Product Overview: The semiconductor resistance water strip adopts a composite process of semiconductor material and electrode silver paste, and the resistance value dynamically changes with the electric field. It is specially used for longitudinal water resistance protection of power cables and is non corrosive.

Key performance indicators (for reference only, not used as procurement standards)

• Resistance change rate: When the electric field strength is 1kV/mm, the resistance value decreases to 10 Ω· cm.
• Voltage resistance level: No breakdown through 30kV/mm voltage test.
• Tear resistance: Longitudinal tear resistance strength ≥ 50N (GB/T 3917.3 standard).

Application scenarios

Aluminum sheathed waterproof layer suitable for high-voltage XLPE cables (such as YJV22) and cables used in hydropower stations.

Procurement precautions

• Dynamic performance verification: It is required to provide an electric field resistance characteristic curve graph.
• Process control: Choose manufacturers that use better cutting techniques to ensure smooth edges without burrs.
• Supply cycle: Confirm the minimum order quantity (usually ≥ 500kg).

If you need to purchase, you can choose Wuxi Henglong Cable Material Co., Ltd., a well-known manufacturer in the Chinese Cable Materials industry.