Cable Semi-conductive Cushion Water Blocking Tape

1、Structure and Composition

The semi conductive buffer water blocking tape for cables is usually composed of multiple layers, mainly including a semi conductive layer, a buffer layer, and a water blocking layer. Among them, the semiconducting layer is composed of semiconducting materials with good conductivity, which can reduce the accumulation of charges on the insulation surface of the cable and reduce the possibility of partial discharge; The buffer layer provides a certain mechanical buffering effect to protect the cable from external impact; The water blocking layer is made of water absorbing and expanding materials, which can quickly expand when in contact with water, preventing moisture from further penetrating into the interior of the cable.

Semi conductive performance: Semi conductive buffer water barriers have low electrical resistivity and can serve as electrical connections in cables, optimizing the electrical structure of cables and reducing electric field distortion and partial discharge.

Buffer function: The design of the buffer layer enables the waterproof tape to provide a certain degree of buffer protection when the cable is subjected to external impact, reducing the risk of cable damage.

Water blocking function: The water blocking layer is made of water absorbing and expanding materials, which can quickly expand upon contact with water, forming a waterproof barrier that effectively prevents moisture from further penetrating into the interior of the cable.

High mechanical strength: Waterproof tapes usually have high tensile strength and elongation at break, which can withstand the mechanical stress of cables during installation and operation.

Good heat resistance: The product has excellent heat resistance and can maintain stable electrical and physical properties at high temperatures.

Semi conductive buffer water blocking tape for cables is usually used between the insulation shielding layer and the metal sheath of the cable, playing a role in electrical connection, buffer protection, and water blocking. In the cable manufacturing process, the waterproof tape will be wrapped around the cable according to the specified process requirements, forming a continuous semi conductive buffering waterproof layer.

4、Performance indicators

The performance indicators of semiconducting buffer water barriers for cables usually include thickness, unit weight, tensile strength, elongation, expansion rate, expansion height, surface resistance, volume resistance, instantaneous stability, long-term stability, and moisture content. These indicators are of great significance for evaluating the performance and effectiveness of water barriers.

5、Precautions

Choose the appropriate waterproof tape: Select the appropriate waterproof tape material and specifications according to the specific requirements of the cable, ensuring that its electrical, waterproof, and mechanical properties meet the requirements.

Strict control of process: In the cable manufacturing process, it is necessary to strictly control the process parameters such as the winding tension and overlap rate of the waterproof layer to ensure the uniformity and continuity of the waterproof layer.

Quality inspection: Conduct strict electrical and water blocking performance tests on the manufactured cables to ensure that the water blocking tape plays its due role in the cables.