Procurement Guide for Semi-conductive Cushion Water Blocking Tape

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Product Overview: The semi conductive cushion water blocking tape is made of two layers of non-woven fabric sandwiching water blocking powder, with a water absorption expansion rate of ≥ 300%. It has both electric field weakening and water blocking functions, and is specifically used for insulation layer protection of ultra-high voltage cables.

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

• Expansion rate: The expansion volume increases by 200% within 30 seconds.
• Electrical resistivity: 10²~10⁴Ω· cm (ASTM D257 standard).
• Environmental friendliness: Tested by SGS, it does not contain polybrominated biphenyls (PBBs).

Application scenarios

Suitable for insulation buffer layer of 220kV and above cross-linked cables (such as YJLW02) and submarine cables.

Procurement precautions

• Distribution of water blocking powder: The supplier is required to provide a test report on the uniform distribution of water blocking powder.
• Long term performance: Conduct accelerated aging tests at 85 ℃/85% humidity, and the expansion rate should still be ≥ 250%.
• Price comparison: The quality of water absorbing materials directly affects their water blocking effect, so avoid choosing low-priced products without testing reports.

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