Semi-Rigid Dual Wall 4:1 Heat Shrink Tubing
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Model: CB- DWT (4000)
Material
Exterior layer: cross-linked modified semi-rigid polyolefin resin
Inner layer: hot-melt adhesive
Shrink ratio: 4:1
Applications
The semi-rigid dual wall 4:1 heat shrink tubing is designed to meet special requirements for automotive wire harness and automotive tubing. The heat shrink tubing is widely used to provide an insulating seal for various automotive wire harnesses, relieve stress at wire junctions or ends, and protect the wires against friction.
| Type | As supplied | After recovery | ||
| Min. ID(mm) | Max. ID(mm) | Adhesive wall (mm) | Total wall(mm) | |
| CB- 4000-1 | 5.72 | 1.27 | 0.56 | 1.2 |
| CB- 4000-2 | 7.44 | 1.65 | 0.76 | 1.52 |
| CB- 4000-3 | 10.85 | 2.41 | 1.02 | 1.91 |
| CB- 4000-4 | 17.78 | 4.45 | 1.37 | 2.41 |
| Item | Test Method | Specifications | Test Value |
| Operation temperature | ASTM D 2671 | 40ºC to 130ºC | |
| Shrink temperature | Company standard | 110 ºC --135 ºC for jacket | |
| Tensile strength | ASTM D 2671 | ≥10.3 MPa | 18.87 MPa |
| Longitudinal shrinkage | ASTM D 2671 | 0 to -10 % | 5% |
| Elongation at break | ASTM D 2671 | ≥250% | 330% |
| Aging at 168h，175℃±2℃ | ASTM D 3032 | No cracking | Pass |
| Water absorption | ASTM D 570 | ≤1.0 % | 0.5% |
| Volume resistance | ASTM D 2671 | ≥1.0 x 1012 (Ω.cm) | 9.0 x 1014 (Ω.cm) |
- The CB- DWT (4000) has a higher shrink ratio, allowing it to contain wires with larger diameters.
- This dual wall heat shrink tubing can be used as wire shielding for automotive wire harnesses.
- This heat shrink tubing has a thicker hot-melt adhesive layer, which provides a desirable seal against fluids and moisture.
- This dual wall heat shrink tubing has wide operating temperature range of range of -40℃ to 130℃.
- The shrinkage of this dual wall tubing starts at 110℃ and completes at 135℃.
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