4:1 Dual Wall Flame Retardant Heat Shrink Tubing (Item FR52, Flexible Tubing, Offer Green / Red / Yellow Color)
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4:1 Dual wall flame retardant heat shrink tubing is made of the outer cross-linking polyolefin and hot-melt adhesive. Both layers are flame retardant and have good sealing properties and are usually used in marine wires, cables and metal tubingwhich require moisture prevention, corrosion resistance and insulation.
Product features
| The lowest temperature of beginning shrinking | 70℃ |
| The lowest temperature of ending shrinking | 125℃ |
| Operating temperature | -45℃~125℃ |
| Heat shrinking ratio | 4: 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 | ||
| Φ6.0 | 6.0 | 1.5 | 1.15±0.30 | 0.50±0.20 | 100 | |
| Φ8.0 | 8.0 | 2.0 | 1.55±0.30 | 0.60±0.25 | 100 | |
| Φ12.0 | 12.0 | 3.0 | 1.75±0.30 | 0.60±0.25 | 1.22 | |
| Φ16.0 | 16.0 | 4.0 | 2.00±0.35 | 0.70±0.30 | 1.22 | |
| Φ20.0 | 20.0 | 5.0 | 2.30±0.40 | 0.70±0.30 | 1.22 | |
| Φ24.0 | 24.0 | 6.0 | 2.60±0.40 | 0.75±0.30 | 1.22 | |
| Φ32.0 | 32.0 | 8.0 | 3.00±0.50 | 0.90±0.30 | 1.22 | |
| Φ52.0 | 52.0 | 13.0 | 3.35±0.50 | 0.95±0.30 | 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 |
| Lame retardant property | Self-extinguish within 30s | AMS-DTL-23053/4 |
| Thermal shock | No crack and dripping | ASTM D 2671, 250℃×4h |
| Cold bending | No crack | 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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