Between Cable Core and Metal Sheath
Tianrong provides a diverse portfolio of semi-conductive water blocking tapes and semi-conductive bedding tapes engineered for application between the insulated cable core and the outer metal sheath (such as aluminium, lead, steel armour, or copper wire screens) in high-voltage (HV) and extra-high-voltage (EHV) power cables. This layer functions as a mechanical cushion, an electrical bridge, and a radial and longitudinal moisture barrier.
Product Selection:
We supply a comprehensive range of high-performance semi-conductive water-blocking and bedding tapes to be applied between the cable core and metal sheath. We are also fully prepared to customise these products to meet your exact engineering specifications:
Semi-Conductive Water Blocking Tapes:
Material Classification & Product Codes
Double layer semi-Conductive water blocking Tapes: BZSD301, BZSD302, BZSD303, BZSD470, BZSD504
Single layer Semi-Conductive Polyester Tapes: BDZSD250, BDZSD420, BDZSD361, BDZSD500
Semi-Conductive Bulky Water Blocking Tapes: BHZD100, BHZD150, BHZD200
Semi-Conductive Bedding/Shielding Tapes
Material Classification & Product Codes
Semi-Conductive Non-Woven Bedding Tapes: BWFD201, BWFD490
Semi-Conductive Butyl Rubber Tape: BHCD25
Copper Wire Shielding tape: TSD5020, TSD8020
Semi-Conductive Water Blocking Copper Wire Shielding Tape: BZTSD5020, BZTSD8020
High Swelling Performance
Utilising cable-grade superabsorbent polymers (SAPs), Tianrong tapes expand upon contact with water and maintain thermal stability under operational temperatures, blocking longitudinal moisture migration in the cavity beneath the metal sheath.
Low Surface Volume Resistance
Engineered with Tianrong’s characteristic low volume and surface resistance, our tapes provide a highly efficient conductive pathway, eliminating localised electric field concentrations and preventing charge accumulation in interface air gaps.
High Resilience Against Pressure
Engineered with a high-resilience compressible structure, Tianrong's solutions deliver a robust mechanical buffer. This protects the insulated core from mechanical damage during armor embossing or welding, while seamlessly absorbing the thermal expansion and contraction cycles of the metal sheath.
High Heat Resistance
Tianrong’s tapes are constructed with high-tenacity backing fabrics and proprietary, thermally stable coatings, specifically engineered to withstand transient heat exposure during metal extrusion or longitudinal welding without compromising material integrity.
Technical Features & Operational Benefits
Engineered Solutions for Your Application
Every application has unique performance and manufacturing requirements. At Tianrong, we work closely with our customers to develop tailored cable material solutions designed to meet specific technical needs.
From customised specifications and material adjustments to application-focused solutions, our experienced team provides the expertise and flexibility needed to deliver the right product for your project.