Enameled Aluminum Wire
Foil Insulation Types & Performance
Source：Original
Editing：za
Time：2025-04-09 17:19
What Is Foil Insulation?
Foil insulation refers to a composite structure of metal foil (typically aluminum or copper) and insulating materials. It serves to reduce heat transfer, prevent moisture, and provide electrical insulation. Widely used in construction, cable industry, HVAC systems, automotive, household appliances, and aerospace, foil insulation plays a critical role in enhancing energy efficiency and safety.
Common Types of Foil Insulation Materials
PE Foam (Polyethylene Foam)
- Advantages: Lightweight, flexible, excellent thermal insulation
- Applications: Roof insulation, underfloor heating, wall insulation
Fiberglass Cloth
- Advantages: High-temperature resistance, fire-retardant
- Applications: Industrial insulation, cable wrapping, heat shields
PET Film (Polyester Film)
- Advantages: Strong dielectric property, mechanical strength
- Applications: Electrical insulation, transformer foil wrap
Kraft Paper
- Advantages: Cost-effective, easy to laminate
- Applications: Roof and wall insulation backing layer
Non-woven Fabric
- Advantages: Breathable, stable structure
- Applications: HVAC duct insulation, reflective barrier layers
EVA Film
- Advantages: Flexible, moisture-resistant
- Applications: Solar panel back sheets, building thermal films
Key Performance Requirements for Foil Insulation
| Property | Requirement |
|---|---|
| Thermal Reflectivity | ≥ 95% to reduce radiant heat transfer |
| Temperature Resistance | -40°C to +150°C (depending on material) |
| Electrical Insulation | ≥ 10⁶Ω to ensure safety |
| Fire Resistance | UL94 V-0 or VTM-0 rating |
| Moisture Barrier | Low water vapor permeability |
| UV Resistance | Long-term durability in outdoor environments |
Applications of Foil Insulation
- Building & Construction: Roof, wall, and floor insulation
- Electrical Industry: High-voltage cable wrapping, transformer insulation
- Automotive & Transportation: Heat shields, noise barriers, pipe wraps
- Appliances: Water heaters, refrigerators, ovens
- Renewable Energy: Solar panels, energy storage systems
Buying Tips & Quality Considerations
- Check thickness and density – Higher density often means better performance
- Look for bonding strength – Good lamination avoids delamination and bubbling
- Request certifications – SGS, RoHS, REACH, UL reports help verify quality
- Choose trusted suppliers – Reliable brands ensure consistent quality and technical support
Choose the Right Insulation for Lasting Performance
Foil insulation is more than just a layer—it's a crucial component that improves energy efficiency, safety, and system longevity. Understanding the types of insulation materials and their performance helps manufacturers and contractors make informed decisions.
Looking for premium aluminum foil insulation or custom solutions?
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