3:1 Halogen-Free Flame Retardant Dual-Wall TubeReturn
The halogen-free flame retardant dual-wall tubing consists of two layers: an outer layer of halogen-free flame retardant polyolefin insulation material and an inner layer of hot melt adhesive. The inner adhesive layer provides mechanical strain relief and excellent sealing properties.
Its primary functions include waterproof sealing, corrosion prevention, gas leakage prevention, and insulation protection. It is mainly used in various wiring harnesses, marine cables, and metal pipes requiring waterproof sealing, moisture resistance, corrosion protection, insulation, and bundling applications.
Product Features:
● Shrink Ratio: 3:1
● Initial Shrink Temperature: ≥+70℃
● Full Shrink Temperature: ≥+125℃
● Operating Temperature: -45℃~+125℃
● Flame retardant outer layer
● Environmental Standard: RoHS
● Standard Color: Black (other colors available upon request)
Outer Layer Technical Parameters:
| Property | Test Method | Specification |
|---|---|---|
| Tensile Strength (MPa) | ASTM D 2671 | ≥10.4 |
| Elongation at Break (%) | ASTM D 2671 | ≥200 |
| Aged Tensile Strength | 158℃×168h | ≥7.3 MPa |
| Aged Elongation | 158℃×168h | ≥100% |
| Axial Shrinkage (%) | ASTM D 2671 | ≤±8 |
| Flame Retardancy | ASTM D 2671 B | Pass |
| Dielectric Strength (kV/mm) | IEC 60243 | ≥15 |
| Volume Resistivity (Ω·cm) | IEC 60093 | ≥1×10¹⁴ |
Hot Melt Adhesive Technical Parameters:
| Property | Test Method | Specification |
|---|---|---|
| Softening Point (℃) | ASTM E 28 | 95 |
| Water Absorption (%) | ASTM D570 | <0.2 |
| Peel Strength (PE) (N/25mm) | ASTM D1000 | ≥120 |
| Peel Strength (Al) (N/25mm) | ASTM D1000 | ≥80 |
Specification Table:
Size | Supplied Inner Diameter (mm) | Fully Shrunk (mm) | Packaging (m/roll or m/pc) | ||
Inner Diameter | Total Wall Thickness | Adhesive Layer Thickness | |||
φ2.4 | ≥2.4 | ≤0.8 | 0.80±0.30 | 0.40±0.2 | 200 |
φ3.2 | ≥3.2 | ≤1.0 | 0.90±0.30 | 0.40±0.2 | 200 |
φ4.8 | ≥4.8 | ≤1.6 | 1.05±0.30 | 0.40±0.2 | 100 |
φ6.4 | ≥6.4 | ≤2.2 | 1.25±0.30 | 0.45±0.2 | 100 |
φ7.9 | ≥7.9 | ≤2.7 | 1.35±0.30 | 0.45±0.2 | 100 |
φ9.5 | ≥9.5 | ≤3.2 | 1.45±0.30 | 0.50±0.2 | 50 |
φ12.7 | ≥12.7 | ≤4.2 | 1.75±0.30 | 0.50±0.2 | 1.22 |
φ15.0 | ≥15.0 | ≤5.2 | 1.75±0.30 | 0.55±0.2 | 1.22 |
φ19.1 | ≥19.1 | ≤6.3 | 2.00±0.30 | 0.60±0.3 | 1.22 |
φ25.4 | ≥25.4 | ≤8.5 | 2.10±0.40 | 0.60±0.3 | 1.22 |
φ30.0 | ≥30.0 | ≤10.2 | 2.15±0.40 | 0.65±0.3 | 1.22 |