GDW: Dual Wall Tubing
GDW is dual wall tubing manufactured by co-extrusion of polyolefin and hot melt adhesive. Designed to provide both insulation and sealing for protected articles.
Applications
- Provides permanent waterproof barrier & environmental seal for electrical components such as wire splices & harness in automobile & communication industry.
- Used as an alternative to moulded parts and cable breakouts
- High shrink ratio enables insulation of cables with connectors of various sizes-Suitable for use in telecommunication, industrial equipment, automotive and avionics.
General Product Properties
- Shrink ratio 3:1 and 4:1
- Operating temperature ranges from -550C to +1250C
- Resistance to weathering and UV rays
- Chemical, copper corrosion and fungus resistance
- Dielectric strength of 15kV/mm.
- Meets RoHS Compliance
- Meets IP 68 (Ingress Protection)
Diagram
Specifications
Selection Chart – 3.1
| Part Number / Size | Internal Diameter (mm) | Recovered Thickness | Recovered Adhesive | Standard | ||
|---|---|---|---|---|---|---|
| Part | Size | Supplied | Recovered | (Incl. Adhesive) (mm) | Thickness (mm) | Package |
| GDW 3/1 | 3 | 3.0 mm | 1.0 mm | 0.9 mm | 0.35 mm | 200m/spool |
| GDW 6/2 | 6 | 6.0 mm | 2.0 mm | 1.1 mm | 0.4 mm | 100m/spool |
| GDW 9/3 | 9 | 9.0 mm | 3.0 mm | 1.3 mm | 0.5 mm | 30m/spool |
| GDW 12/4 | 12 | 12.0 mm | 4.0 mm | 1.5 mm | 0.6 mm | 30m/spool |
| GDW 18/6 | 18 | 18.0 mm | 6.0 mm | 1.9 mm | 0.7 mm | 30m/spool |
| GDW 24/8 | 24 | 24.0 mm | 8.0 mm | 2.2 mm | 0.8 mm | 25m/spool |
| GDW 30/10 | 30 | 30.0 mm | 10.0 mm | 2.3 mm | 0.9 mm | 25m/spool |
| GDW 39/13 | 39 | 39.0 mm | 13.0 mm | 2.4 mm | 0.9 mm | 25m/spool |
| GDW 50/17 | 50 | 50.0 mm | 17.0 mm | 2.4 mm | 0.9 mm | 25m/spool |
Selection Chart – 4.1
| Part Number / Size | Internal Diameter (mm) | Recovered Thickness | Recovered Adhesive | Standard | ||
|---|---|---|---|---|---|---|
| Part | Size | Supplied | Recovered | (Incl. Adhesive) (mm) | Thickness (mm) | Package |
| GDW 4/1 | 4 | 4.0 mm | 1.0 mm | 1.05 mm | 0.40 mm | 200m/spool |
| GDW 6/1.5 | 6 | 6.0 mm | 1.5 mm | 1.15 mm | 0.40 mm | 100m/spool |
| GDW 8/2 | 8 | 8.0 mm | 2.0 mm | 1.2 mm | 0.4 mm | 50m/spool |
| GDW 12/3 | 12 | 12.0 mm | 3.0 mm | 1.5 mm | 0.6 mm | 30m/spool |
| GDW 16/4 | 16 | 16.0 mm | 4.0 mm | 1.8 mm | 0.6 mm | 30m/spool |
Technical Specification
| PROPERTIES | VALUE | STANDARD |
|---|---|---|
| Physical | ||
| Tensile Strength | 9 N/mm² (Mpa) (Min.) | ASTM D638 |
| Ultimate Elongation | 300% (min) | ASTM D638 |
| Water Absorption | 0.15% (Max.) | ASTM D570 |
| Specific Gravity | 1.4 | ASTM D792 |
| Longitudinal Change | -10% (Max.) | ASTM D638 |
| Thermal | ||
| Operating Temp. (Outer Wall) | -55°C to +125°C | IEC 216 |
| Heat Shock (250°C for 4 hrs.) | No dripping, cracking or flowing (Outer Wall) | – |
| Flammability | Pass | ASTM D2671 |
| Chemical | ||
| Fungus Resistance | Inert | MIL-1-7444 |
| Copper Corrosion | Good | ASTM D2671B |
| Chemical Resistance | Good | ASTM D2671 |
| Electrical | ||
| Dielectric Strength | >15 kV/mm | ASTM D2671 |
| Dielectric Constant | 3.0 (Max.) | ASTM D150 |
| Volume Resistivity | 1 x 10¹³ Ohm.cm (Min) | ASTM D257 |
D: Dia. as Supplied | d: Dia. as Free Recovered | T: Free Recovered Wall Thickness
Certificates
FAQs
1. What is a Heat Shrink Shroud?
A Heat Shrink Shroud is a protective sleeve made from cross-linked polymer material that shrinks when heat is applied. It provides insulation, sealing, and mechanical protection for cables, joints, and terminations.
2. How does a Heat Shrink Shroud work?
When heat is applied using a heat gun or torch, the shroud shrinks uniformly and tightly wraps around the cable or joint, creating a secure and sealed covering.
When heat is applied using a heat gun or torch, the shroud shrinks uniformly and tightly wraps around the cable or joint, creating a secure and sealed covering.
3. What material is Heat Shrink Shroud made of?
It is typically made from cross-linked polyolefin material, often containing carbon black for UV resistance and weather protection.
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