Superabsorbent polymer (SAP)for water-blocking purposes in cables

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Superabsorbent polymer (SAP) is a critical material used for water-blocking purposes in cables, offering rapid absorption capabilities in case of cable outer layer damage.

Advantages of Superabsorbent Polymer for Water-Blocking Yarn/Tape:

  • High Absorption Speed: SAP quickly absorbs permeated water, preventing potential damage to cable components.
  • Neutral Properties: When mixed with ointment, SAP maintains a neutral composition, safeguarding metal components within the cable.

Specifications:

Item Indexes Result
Appearance White powder or granular White powder or granular
Particle size(μm)   212-150μm  28.85%
150-120μm  21.27%
120-106μm  26.23%
106-80μm  21.48%
≤80μm  5.17%
Water-keeping ratio(ml/g) ≥320 420
Ph value 6.5-7.5 7
Inflation altitude(mm/min) (20℃ pure water)   20mm/1 min
22mm/2 min
24mm/3 min
Residual Monomer(ppm) ≤400 100
Volume density (g/cm3) 0.6-0.7 0.69

These specifications demonstrate SAP’s effectiveness and reliability in maintaining cable integrity by swiftly absorbing water and maintaining a stable, neutral composition.

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