Double-sided semi-conductive
water-blocking tape.

Covered swellable laminate for power cable interfaces requiring semi-conductivity.

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CBZSD / SEMI-CONDUCTIVE Black double-sided semi-conductive water-blocking tape

BLACK SEMI-CONDUCTIVE NONWOVEN

0.25–0.50 mmNominal thickness

100–170 g/m²Nominal mass

10–18 mmMin. swelling after 3 min

Semi-conductiveElectrical type

THE MATERIAL

Material construction.

Semi-conductive polyester nonwoven fabric with polyacrylate swelling powder and corrosion inhibitor.

Polyacrylate powder absorbs incoming water and swells into a gel, helping close internal water paths after sheath damage. The nonwoven wrap also provides bedding and separation. The semi-conductive carrier is used where the cable design requires a conductive interface.

01Swellable barrier

Absorbs incoming water to limit longitudinal movement.

02Covered laminate

Covering helps retain swelling powder during handling.

03Conductive interface

Specified surface resistance of ≤1500 Ω.

MATERIAL PROPERTIES

Technical specification.

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Select grade

SELECTED GRADECBZSD-30

THICKNESS0.30 ±0.03 mm

MASS PER UNIT AREA110 ±10 g/m²

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Double-sided semi-conductive water-blocking tape — grade comparison
Property	Unit	CBZSD-30	CBZSD-35	CBZSD-40	CBZSD-50	CBZSD-25	CBZSD-35N	CBZSD-40N	CBZSD-50N
Thickness	mm	0.30 ±0.03	0.35 ±0.03	0.40 ±0.03	0.50 ±0.03	0.25 ±0.03	0.35 ±0.03	0.40 ±0.03	0.50 ±0.03
Mass per unit area	g/m²	110 ±10	120 ±10	130 ±10	160 ±10	100 ±10	130 ±10	140 ±10	170 ±10
Minimum tensile strength	N/cm	≥30	≥35	≥40	≥50	≥25	≥35	≥40	≥50
Minimum elongation	%	≥12	≥12	≥12	≥12	≥12	≥12	≥12	≥12
Minimum swelling after 1 min	mm	≥8	≥9	≥10	≥12	≥7	≥12	≥12	≥13
Minimum swelling after 3 min	mm	≥12	≥13	≥14	≥16	≥10	≥15	≥16	≥18
Short-term thermal stability	°C	230	230	230	230	230	230	230	230
Long-term thermal stability	°C	90	90	90	90	90	90	90	90
Maximum moisture content	%	≤9	≤9	≤9	≤9	≤9	≤9	≤9	≤9
Surface resistance	Ω	≤1500	≤1500	≤1500	≤1500	≤1500	≤1500	≤1500	≤1500
Volume resistivity	Ω·cm	<1 × 10⁶	<1 × 10⁶	<1 × 10⁶	<1 × 10⁶	<1 × 10⁶	<1 × 10⁶	<1 × 10⁶	<1 × 10⁶

Thermal values describe material stability, not a finished-cable temperature rating. Thickness: ISO 9073-2; tensile / elongation: ISO 9073-3; swelling: GB 450; moisture: ISO 287. Electrical properties: GB 3048. Short-term stability: Q/TR.J02.01-2000; long-term stability: IEC 216-1990.

MATERIAL SELECTION

Choosing the right construction.

Choose double-sided laminate when a covered structure and bedding are priorities. Single-sided grades suit interfaces where one active face is sufficient; compare thickness, swelling and handling. Use semi-conductive grades only where the electrical design requires them.

Related water-blocking materials.

Tape wraps broader cable surfaces; yarn targets internal gaps. A combined system can address both.

SUPPLY OPTIONS

Specified for your equipment.

Specify grade, slit width, core ID, roll diameter and pad or spool format. Other grades can be stocked to agreed customer demand.

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Winding format: Pads and spools
To suit the application equipment
Slit widths and dimensions: To specification
Confirm core ID and maximum roll diameter

Application and processing.

Select overlap, tension and swelling allowance to suit the gap and cable design. Validate the complete cable for pressure, water chemistry and temperature. Salt-water duties need specific qualification.

Store sealed, clean and dry. Product imagery is representative.

Double-sided semi-conductivewater-blocking tape.