Non-conductive Film Laminated WBT Water Blocking Tape For Cables

Short Description:

The water- blocking tape is a compound of polyester fiber non-woven and highly water- absorbing material with a water-swelling function. Water blocking tapes and water swellable tapes rapidly absorb liquid at the point of insulation failure and quickly swell to block any further ingress. This ensures any cable damage is minimised, fully contained and is easy to locate and repair. The water-blocking tape is used in power cables and communication optical cables to reduce water and humidity penetration in optical and electric cables so as to increase the service life of optical and electric cables.

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Product Benefits of Water Blocking Tape, Water Swellable Tape

Water blocking tapes and water swellable tapes offer premium performance benefits during the critical first minute of response to water. The use and blending of superior super absorbent polymers (SAP) contributes significantly to enhanced performance. Some of the features and benefits of using water-blocking tapes are:

● Seawater blocking capability

● Fast swell

● Suitable for direct fibre contact

● High yield

● Suitable for fast processing

● Low electrical resistance

● Good cushioning properties

● Asymmetric swell if required

● Proven long term performance

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Technical Specifications of Water-blocking Tape

Physical performance		Unit	Model
Physical performance		Unit	ZSD-25	ZSD-30	ZSD-35	ZSD-45	ZSD-50	ZSD-B-50
Thickness		mm	0.25±0.05	0.30±0.05	0.35±0.05	0.45±0.05	0.50±0.05	0.50±0.05
Constant		g	90±10	100±10	120±10	150±10	170±10	170±10
Tensile Strength		N/15mm	＞50	＞60	＞70	＞70	＞70	＞70
Elongation		%	15	15	15	15	15	15
Moisture Content		%	9	9	9	9	9	9
Expansion Height		mm	10	13	15	15	15	15
Expansion Velocity		mm/1min	≥6	≥10	≥12	≥12	≥12	≥12
Volume Resistance		Ω.cm						＜1000000
Surface Resistance		Ω						≤1500
thermostability	A.Long-Term Temperature Resistance (90°C,4h) Expansion Height B. Instant Temperature Resistance (230°C) Expansion Height	mm	≥12	≥12	≥12	≥12	≥12	≥12
thermostability		mm	≥12	≥12	≥12	≥12	≥12	≥12