Mechanical reinforcement combined with dry water blocking. WBA is a water-swellable para-aramid yarn serving as dielectric strength member and longitudinal water block at the same time — replacing water-blocking tapes and gels in dry cable constructions.
WBA combines axial load bearing with swellable water blocking in a single dielectric yarn. It simplifies dry cable constructions by replacing separate water-blocking tapes and gels while continuing to carry tensile load as a strength member.
High tensile strength · outstanding flexibility · impact and fatigue resistance · excellent water-absorbing ability.
Dry-core optical cable constructions requiring longitudinal water-blocking performance together with a non-metallic strength member. Final water-blocking performance shall be validated in the complete cable construction.
| Property | Unit | WBA1500 (spec. / typ.) | WBA3000 (spec. / typ.) |
|---|---|---|---|
| Linear density | denier | 1670–1870 / 1770 | 3250–3470 / 3350 |
| Breaking strength | N | ≥ 270 / 310 | ≥ 530 / 600 |
| Elongation at break | % | 2.1–2.7 / 2.4 | 2.0–3.0 / 2.5 |
| Tensile modulus | GPa | ≥ 112 / 115 | ≥ 112 / 115 |
| LASE @ 0.3% elongation | N | ≥ 26 / 34 | ≥ 50 / 60 |
| LASE @ 0.5% elongation | N | ≥ 51 / 60 | — |
| LASE @ 1.0% elongation | N | ≥ 103 / 120 | ≥ 100 / 120 |
| Absorption capacity | g/g | ≥ 8.0 / 15 | ≥ 8.0 / 15 |
Test methods: ASTM D1907 (linear density), ASTM D885 (tensile and LASE), IEC 60794-1-2 (absorption capacity). Conditions: 21 ± 1 °C, 65 ± 2% RH. WBA does not by itself define the water resistance of a finished cable — final water-blocking performance shall be validated in the complete cable construction.
| Package | Spec ID | Length | Traverse | Max OD |
|---|---|---|---|---|
| Supply tube SF94 × 216 | 94 mm | 216 mm | 185 mm | 270 mm |
| Supply tube SF94 × 290 | 94 mm | 290 mm | 250 mm | 270 mm |
Sampling on standard tubes for stranding trials; other package forms available on request under OEM terms.