What is the function of polyurethane rigid foam insulation composite board?

Polyurethane rigid foam insulation composite panel is a high-performance insulation material with polyurethane rigid foam as the core layer and composite metal or non-metallic surface materials on both sides. It is widely used in construction, industry, cold chain and other fields. Its role can be summarized into the following core aspects:

1. Excellent thermal insulation performance

Low thermal conductivity

The thermal conductivity of polyurethane rigid foam is only 0.018-0.024W/(m·K), which is much lower than traditional insulation materials (such as rock wool 0.035-0.045W/(m·K), EPS foam 0.038W/(m·K)). This means that at the same thickness, polyurethane rigid foam composite panels can more effectively prevent heat transfer and reduce energy consumption.

Application scenarios: building exterior wall insulation, cold storage insulation, industrial pipeline insulation, etc. For example, in severe cold areas, building exterior walls using polyurethane rigid foam composite panels can reduce heating energy consumption by 30%-50%.

Advantages of closed cell structure

Polyurethane rigid foam is composed of more than 90% closed cells, which prevents air from convection, further improving the thermal insulation effect. This structure can also prevent moisture penetration and avoid the degradation of thermal insulation performance caused by moisture.

2. Structural strength and stability

Composite structural reinforcement

The polyurethane rigid foam composite board uses metal (such as color steel plate, aluminum plate) or non-metal (such as glass fiber reinforced cement board, inorganic fireproof board) surface materials on both sides to form a 'sandwich' structure, which significantly improves the overall compressive and bending strength.

Data support: The compressive strength of composite panels with standard thickness (50mm) can reach 150-200kPa, far exceeding the strength of single polyurethane foam, and can withstand the walking of people or the placement of light equipment.

Dimensional stability

The dimensional change rate of polyurethane rigid foam is less than 1% in the temperature range of -50°C to +150°C, which avoids cracking or deformation caused by temperature fluctuations and is suitable for extreme climate environments.

3. Fire protection and safety performance

Flame retardant grade optimization

By adding flame retardants, polyurethane rigid foam composite panels can reach Class B1 (flammable) or Class A (non-combustible) fire protection standards, meeting the requirements of building fire protection regulations.

Application case: In the insulation of exterior walls of high-rise buildings, B1-level composite panels can effectively delay the spread of fire and buy time for people to evacuate.

non-toxic smoke release

High-quality polyurethane rigid foam composite panels will not produce toxic gases (such as hydrogen cyanide) when burned, comply with environmental protection and safety standards, and are suitable for use in crowded places.

4. Waterproof, moisture-proof and corrosion resistance

Closed cell structure waterproof

The closed-cell structure of polyurethane rigid foam makes it have excellent waterproof performance, with a water absorption rate of less than 3%, and can be exposed to humid environments for a long time without failure.

Application scenarios: Integrated thermal insulation and waterproofing treatment of wet areas such as underground projects, bridges and tunnels.

Surface material corrosion resistant

Metal surface materials (such as galvanized color steel plates) have undergone anti-corrosion treatment and can resist corrosive environments such as acid rain and salt spray, extending the service life of the composite panels.

5. Construct convenience and economy

Modular installation

The polyurethane rigid foam composite board adopts standard sizes (such as 1200mm × 600mm) and is fixed by plugging or self-tapping screws. The construction efficiency is more than 50% higher than traditional insulation materials (such as on-site spraying of polyurethane).

Cost comparison: Taking a 1,000-square-meter building exterior wall as an example, the comprehensive cost (material + construction) of composite panels is 15%-20% lower than that of rock wool board systems.

Lightweight design

The density is only 35-45kg/m³, which is 1/10 of the concrete insulation wall, which can reduce the weight of the building and reduce the structural cost.

6. Environmental protection and sustainability

Low carbon production

The synthesis process of rigid polyurethane foam does not produce ozone-depleting substances (such as chlorofluorocarbons) and can be recycled. Some companies use bio-based polyether polyols to further reduce carbon emissions.

long life cycle

The service life can reach more than 25 years, which reduces the waste of resources caused by frequent replacement and is in line with the concept of green building.

7. Multi-field application scenarios

construction field

Exterior wall insulation: Combined with the curtain wall system to achieve integration of insulation and decoration.

Roof insulation: In the inverted roof design, the composite panels are laid directly on the waterproof layer to simplify the construction process.

Cold storage construction: In -18℃ to +4℃ cold storage, composite panels can maintain temperature stability and reduce cooling loss.

Industrial field

Pipe insulation: wrapped around petroleum and chemical pipelines to prevent heat loss.

Equipment insulation: Wrap boilers, reactors and other equipment to reduce surface temperatures and ensure operational safety.

Transportation field

Refrigerated truck box: Composite panels form the main body of the truck to maintain a low-temperature transportation environment.

High-speed rail carriage: used as floor or side wall material to provide sound insulation and heat preservation functions.