Heat Shrink Semi-Conductive Tube / Dual Wall Insulation Tubing
This heat shrink tube is used to wrap cables up to 42kV. The semi-conductive tube is made of radiation crosslinked polyolefin. It has two walls, with the inner red wall supporting the outer one to have robust structure, while the outer one insulating electricity.
Technical Data
Inner Insulation Layer
| Property | Test Method | Standard Value |
| Tensile Strength | ASTM-D-638 | ≥10MPa |
| Elongation at Break | ASTM-D-638 | ≥350% |
| Tensile Strength After Heat Aging (130℃×168h) | ASTM-D-5510 | ≤±20% |
| Elongation at Break After Heat Aging (130℃×168h) | ASTM-D-5510 | ≤±20% |
| Volume Resistivity | IEC 60093 | ≥1× Ω.cm |
| Dielectric Strength | IEC 60243 | ≥20kV (mm) |
| Dielectric Constant | IEC 60250 | ≤4 |
| Brittle Temperature | ISO 974 | -40℃ |
| Hardness (Shore A) | ISO 868 | ≥80 |
| Heat Shock | 160℃, 4h | No Crack |
| Longitudinal Shrinkage | ASTM-D-2671 | ≤10% |
| Eccentricity | ASTM-D-2671 | ≤30% |
Outer Semi-Conductive Layer
| Property | Test Method | Standard Value |
| Tensile Strength | ASTM-D-638 | ≥10MPa |
| Elongation at Break | ASTM-D-638 | ≥350% |
| Tensile Strength After Heat Aging (130℃×168h) | ASTM-D-5510 | ≤±20% |
| Elongation at Break After Heat Aging (130℃×168h) | ASTM-D-5510 | ≤±20% |
| Volume Resistivity | IEC 60093 | ≤1× Ω.cm |
| Hardness (Shore A) | ISO 868 | ≥80 |
| Heat Shock | 160℃, 4h | No Crack |
| Brittle Temperature | ISO 974 | -40℃ |
| Longitudinal Shrinkage | ASTM-D-2671 | ≤10% |
| Eccentricity | ASTM-D-2671 | ≤30% |
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