3:1 Flame Retardant Dual Wall Heat Shrink Tubing (Item FR50, Flexible Tubing, Offer Yellow / Red / Green Color)
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3:1 Flame retardant dual wall heat shrink tubing consists of cross-linking polyolefin outside and inner hot-melt adhesive, both of which are flame retardant materials and also have excellent ability to resist ultraviolet rays and buffer mechanical strain, fulfilling military standards AMS-DTL-23053/4.
In addition, on account of the flame retardant dual wall heat shrink tubing's good sealing property, it is applied in such occasions where wires and cables used for ships, metal tubes and so on that need to prevent moisture entry. Furthermore, it can also be used to bind and fix muti-strand wires.
Product features| The lowest temperature of beginning shrinking | 70℃ |
| The lowest temperature of ending shrinking | 125℃(completely) |
| Operating temperature | -45℃~125℃ |
| Heat shrinking ratio | 3:1 |
| Flame retardant type | Yes |
| Major material | EVA |
| Standard color | black (other colors can be ordered) |
| Specification | Inner diameter before shrinking | Size after shrinking(mm) | Package standard | ||
| Inner diameter Minimum(mm) | Inner diameter maximum | Total wall thickness | Adhesive layer wall thickness | Meter/coil or piece | |
| Φ3.2 | 3.2 | 1.0 | 0.90±0.15 | 0.35±0.10 | 200 |
| Φ4.8 | 4.8 | 1.6 | 1.00±0.15 | 0.40±0.10 | 100 |
| Φ6.4 | 6.4 | 2.2 | 1.25±0.15 | 0.45±0.12 | 100 |
| Φ7.9 | 7.9 | 2.7 | 1.30±0.15 | 0.50±0.12 | 100 |
| Φ9.5 | 9.5 | 3.2 | 1.40±0.15 | 0.50±0.12 | 50 |
| Φ12.7 | 12.7 | 4.2 | 1.70±0.15 | 0.50±0.12 | 1.22 |
| Φ15.0 | 15.0 | 5.2 | 1.80±0.15 | 0.55±0.15 | 1.22 |
| Φ19.1 | 19.1 | 6.3 | 1.95±0.15 | 0.55±0.15 | 1.22 |
| Φ25.4 | 25.4 | 8.5 | 2.05±0.20 | 0.55±0.15 | 1.22 |
| Φ30.0 | 30.0 | 10.2 | 2.20±0.20 | 0.60±0.15 | 1.22 |
| Φ39.0 | 39.0 | 13.5 | 2.50±0.20 | 0.60±0.15 | 1.22 |
| Φ50.0 | 50.0 | 17.0 | 2.80±0.25 | 0.70±0.15 | 1.22 |
| Property | Index | Test method |
| Tensile strength | ≥12MPa | ASTM D 2671 |
| Breaking elongation | ≥300% | ASTM D 2671 |
| Tensile strength after heat aging | ≥8.4MPa | 175℃×168h |
| Breaking elongation after heat aging | ≥100% | 175℃×168h |
| The axial changing ratio | -8%~+8% | ASTM D 2671 |
| Flame retardant property | Self-extinguish within 30s | AMS-DTL-23053/4 |
| Thermal shock | No crack and dripping | ASTM D 2671, 250℃×4h |
| Cold bending | No track | STM D 2671, -45℃×4h |
| Water absorption ratio | ≤0.50% | ASTM D 570 |
| Disruptive strength | ≥15kV/mm | IEC 60243 |
| Volume resistivity | ≥1014Ω=cm | IEC 60093 |
| Property | Index | Test method |
| Softening point | 95±5℃ | ASTM E 28 |
| Water absorption point | 0.005 | ASTM D 570 |
| The minimum peel strength of PE | 120N/25mm | ASTM D 1000 |
| The minimum peel strength of AL | 80N/25mm | ASTM D 1000 |
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