Views: 0 Author: Site Editor Publish Time: 2025-09-18 Origin: Site
Polyurethane hard bubble insulation composite board is a high-performance building enclosure material with polyurethane hard bubble as the core insulation layer and composite metal or non-metal panels on both sides. Its characteristics and advantages can be summarized into the following aspects:
1. Excellent thermal insulation performance
Low thermal conductivity
The thermal conductivity of polyurethane hard bubbles is only 0.018-0.024 W/(m·K), which is far lower than that of traditional insulation materials (such as 0.038 W/(m·K) of EPS and 0.035 W/(m·K) of rock wool). This means that at the same thickness, polyurethane hard foam composite panels provide more efficient insulation and reduce building energy consumption.
Closed-cell structure
The closed cell ratio of polyurethane hard bubbles is as high as more than 95%, forming a continuous thermal insulation layer, effectively blocking thermal convection and thermal radiation. Even in humid environments, the closed-cell structure can prevent moisture penetration, avoid the increase in thermal conductivity due to water absorption, and ensure stable long-term insulation performance.
2. High strength and light weight
Compression and impact resistance
The compressive strength of polyurethane hard bubbles can reach 200-500 kPa (depending on the density). Combined with the enhancement effect of both sides of the panels, the overall compressive strength of the composite panel is significantly improved. For example, metal-surface polyurethane composite panels can withstand the loads of people walking or equipment installation, and are suitable for industrial factories, cold storage and other scenarios.
Lightweight design
The density is usually 30-50 kg/m³, which is only 1/10-1/15 of the concrete slab. Lightweight properties can reduce the self-weight of the building structure and reduce the foundation load, especially for high-rise buildings or large-span structures (such as sports venues, airport terminals).
3. Excellent durability and environmental adaptability
Anti-aging and corrosion resistance
Polyurethane hard bubble layer: chemically stable, resistant to ultraviolet rays, ozone and chemical corrosion, and has a service life of more than 30 years.
Panel selection: Galvanized steel plates, aluminum alloy plates, stainless steel plates or anti-corrosion color steel plates can be selected according to environmental needs to adapt to harsh climate conditions such as acid rain and salt spray.
Waterproof and moisture-proof
The sealing design of closed-cell structure and panels makes the composite panel have excellent waterproof performance, extremely low water absorption (≤3%), and can remain dry for a long time to avoid insulation performance attenuation or structural damage caused by moisture.
4. Improve fire safety performance
Flame retardant modification technology
By adding flame retardants (such as phosphorus-based and nitrogen-based flame retardants), the oxygen index of polyurethane hard foam can be increased to 26%-30%, reaching the B1 (flammable) or B2 (combustible) fire resistance standards. Some high-end products adopt structural flame retardant technology, with no droplets and low smoke density during combustion, meeting the requirements of building fire protection specifications.
Fireproof structure design
Fire-resistant materials (such as aluminum foil and fire-resistant gypsum board) can be used on both sides of the composite panel to form a composite fire-resistant structure. For example, metal-surface polyurethane composite panels can maintain structural integrity in fires, delay the spread of fires, and buy time for evacuation of personnel.
5. Construct convenience and economy
Modular installation
The composite panel adopts standardized sizes (such as 1200mm×600mm), and is quickly spliced through hidden or bright nail connectors, reducing on-site cutting and wet operations, and improving construction efficiency by more than 50%. For example, the cold storage construction cycle can be shortened to 1/3 of the traditional method.
Comprehensive cost optimization
Material cost: Although the unit price is higher than traditional insulation materials, the overall material usage is reduced due to thinning thickness (such as 50mm polyurethane board instead of 100mm rock wool board).
Labor cost: The construction cycle is shortened and labor costs are reduced, and no additional waterproofing or leveling layer is required, making the overall construction cost more competitive.
Maintenance cost: Strong durability, reduces the frequency of later repair or replacement, and the full life cycle cost is lower than that of traditional solutions.
6. Environmental protection and sustainability
Low carbon production
Polyurethane hard foam adopts on-site spraying or factory prefabricated processes, with high raw material utilization rate (up to more than 95%), reducing waste of scraps. Some enterprises use bio-based raw materials (such as castor oil) to replace some petroleum-based raw materials to reduce carbon emissions.
Recyclability
Metal panels can be 100% recycled and reused, and the polyurethane hard bubble layer can be degraded physically or chemically. Some products have been recycled, which is in line with the development trend of green building.
7. Multifunctional integrated design
Integration of decoration and insulation
The panel surface can be pre-coated with fluorocarbon paint, wood grain transfer or stone texture, and is directly used as a building exterior finish, eliminating the keel and decorative layer of traditional curtain walls, simplifying the construction process and reducing costs.
Acoustic performance optimization
By adjusting the density or panel structure of polyurethane hard bubbles (such as perforated plates), the composite panel can have sound absorption functions and is suitable for places such as theaters and conference rooms with high acoustic requirements.
Typical application scenarios
Cold chain logistics: Insulated enclosure structure of cold storage and refrigerated trucks to maintain a stable low temperature environment.
Industrial building: The roof and wall insulation of factory buildings and warehouses, taking into account energy conservation and structural strength.
Civil buildings: High-rise residential exterior wall insulation system, meets energy-saving standards and improves construction efficiency.
Special environment: corrosive environments such as chemical workshops and marine platforms, ensuring safety through anti-corrosion panels and flame retardant design.
