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 |
Erscheinungsbild | 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.