What is PIR Material?
PIR (Polyisocyanurate) is a type of thermal insulation foam developed from polyurethane through chemical modification. PIR offers superior insulation performance compared to conventional materials, making it the top choice for cold storage applications and buildings requiring strict temperature control. For comprehensive solutions about sandwich panels, understanding PIR material is essential.
PIR is created through the polymerization reaction between polyisocyanate and polyol under tightly controlled conditions. This process produces a closed-cell structure with higher thermal stability than conventional PU. For those seeking insulation solutions with better fire ratings, PIR is the right choice.
Technical Properties of PIR Material
PIR material has technical characteristics that distinguish it from other insulation types. Here are the main properties you need to know:
1. Low Thermal Conductivity
PIR has a thermal conductivity value of approximately 0.022-0.026 W/m·K, lower than EPS (0.035-0.040 W/m·K) and slightly better than standard PU. This means PIR can resist heat transfer more effectively, reducing cooling loads by 15-20% compared to conventional materials.
2. High Temperature Stability
One of PIR main advantages is dimensional stability at high temperatures. PIR can withstand operating temperatures up to 140°C without significant decomposition. Meanwhile, standard PU begins to degrade at temperatures around 100-120°C. This property makes PIR ideal for industrial applications with extreme temperature fluctuations.
3. Superior Fire Rating
PIR inherently has better fire-resistant properties than PU. This material achieves a B1 fire rating (difficult to ignite) according to European classification, with a higher auto-ignition temperature (around 400°C vs 300°C for PU). Many modern cold storage projects require the use of PIR to meet strict fire safety regulations.
4. Density and Strength
PIR density typically ranges from 35-45 kg/m³, providing an optimal balance between structural strength and weight. Sandwich panels with PIR cores can withstand significant mechanical loads without adding excessive weight to the building structure.
5. Water Vapor Resistance
PIR closed-cell structure provides excellent resistance to water vapor diffusion. The water vapor resistance factor (μ) of PIR reaches values of 100-200, much higher than fibrous insulation materials. This prevents internal condensation and maintains insulation efficiency in the long term.
Main Applications of PIR Sandwich Panels
Based on its technical properties, PIR is the ideal choice for various industrial applications:
Cold Storage and Freezer Rooms
The most common application of PIR is for cold storage and freezer rooms. The need for very low temperatures (-25°C to -40°C) requires materials with minimal heat transfer coefficients. PIR meets these requirements while providing additional safety in terms of fire resistance.
Pharmaceutical and Cleanroom
The pharmaceutical and biotechnology industries require environments with strict temperature and cleanliness control. PIR panels with easy-to-clean surfaces and consistent thermal stability have become the standard solution for cleanrooms and GMP facilities.
Food Processing Facilities
Food processing plants require temperature-controlled spaces to maintain product quality. PIR is suitable for partition walls, ceilings, and cold storage rooms in food processing facilities because it is resistant to moisture and easy to sanitize.
Industrial Buildings with Strict Fire Safety Requirements
Chemical warehouses, flammable material storage facilities, and industrial buildings with strict safety regulations often require the use of materials with high fire ratings. PIR provides thermal insulation solutions without compromising fire safety aspects.
Comparison of PIR with Other Insulation Materials
To help you choose the right material, here is a comparison of PIR with other options:
| Characteristic | PIR | Standard PU | EPS | Rockwool |
|---|---|---|---|---|
| Thermal Conductivity (W/m·K) | 0.022-0.026 | 0.024-0.028 | 0.035-0.040 | 0.035-0.045 |
| Max Operating Temperature | 140°C | 100-120°C | 80°C | 250°C+ |
| Fire Rating | B1 (difficult to ignite) | B2 (flammable) | B2 (flammable) | A1 (non-combustible) |
| Density (kg/m³) | 35-45 | 38-45 | 15-30 | 50-150 |
| Water Vapor Resistance | Excellent | Good | Moderate | Low |
| Relative Price | High | Medium-High | Low | Medium |
From the table above, PIR stands out in the combination of excellent thermal performance with safer fire ratings. Although the price is higher, this investment is often paid back through energy savings and regulatory compliance.
Technical Specifications of PIR Sandwich Panels
Here are the general specifications of sandwich panels with PIR cores available on the market:
Panel Thickness
PIR panels are available in various thicknesses: 50mm, 75mm, 100mm, 120mm, 150mm, and 200mm. The choice of thickness depends on the target room temperature and external environmental conditions. For -40°C freezer rooms, panels of 150-200mm are usually required.
Facing Materials
PIR cores can be paired with various types of facing:
- Prepainted steel (PPGI/PPGL): Most common, corrosion-resistant, various colors
- Stainless steel: For food-grade applications and high sanitation
- Aluminium: Lightweight, suitable for ceilings and interior applications
- PVC/Fiber cement: Economical options for non-structural applications
Profile and Joint System
PIR panels generally use a tongue-and-groove joint system with camlock or hidden screw fixing. This system ensures good thermal sealing and ease of installation.
Advantages and Limitations of PIR
Like every material, PIR has advantages and limitations that need to be considered:
Advantages
- Best-in-class thermal efficiency for polymer foam
- Superior fire rating compared to PU and EPS
- Dimensional stability at high temperatures
- Excellent water vapor resistance
- Long-term durability (20+ years)
- Lightweight yet structurally strong
Limitations
- Higher price than EPS and standard PU
- Requires careful handling during installation
- Not suitable for very high temperature applications (>140°C)
- Production requires strict quality control
- Limited supplier availability compared to common materials
FAQ About PIR Material
What is the main difference between PIR and PU?
PIR is a modification of PU with a different polymerization process. PIR has a more stable molecular structure at high temperatures, providing better fire ratings and slightly lower thermal conductivity. Standard PU is more economical but less fire-resistant.
How long is the service life of PIR sandwich panels?
With proper installation and maintenance, PIR sandwich panels can last 20-30 years. The chemical stability of PIR prevents material degradation in the long term, maintaining consistent insulation performance throughout its service life.
Is PIR environmentally friendly?
PIR uses blowing agents with lower Global Warming Potential (GWP) compared to previous generations. Some manufacturers now use HFO (Hydrofluoroolefin) blowing agents with near-zero GWP.
What is the price of PIR sandwich panels per meter?
The price of PIR sandwich panels varies depending on thickness and facing specifications. Generally ranges from IDR 450,000 - 850,000 per square meter for standard panels.
Is PIR suitable for roofing?
Yes, PIR can be used for roofing applications with consideration of operating temperatures. However, for roofs with direct sunlight exposure, proper thermal bridging calculations are needed.
Conclusion
PIR material is a premium choice for sandwich panel applications that require the best thermal insulation performance with strict fire safety standards. Although the initial investment is higher, long-term energy efficiency and regulatory compliance make PIR a smart choice for cold storage, cleanrooms, and modern industrial facilities.
If you are planning a project with special insulation needs, our technical team is ready to help. Contact us at sandwichpanels.id for free consultation and the best price offers.
