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Polyurethane (PU) sandwich panels are widely recognized for their excellent thermal insulation and structural performance. They are used in various applications such as construction, cold storage, and cleanroom environments. The specifications of these panels may vary depending on the manufacturer, but here is a general overview based on common industry standards.

Bonding Strength and Fire Resistance

Polyurethane sandwich panels are known for their high bonding strength. Typically, the bonding strength is not less than 0.09 MPa, ensuring durability and reliability in different environments. The fire resistance of polyurethane panels is rated as Class B1, which means they exhibit low flammability. These panels are a solid choice when both insulation and safety are priorities. Additionally, when the deflection of the panel reaches Lo/200 (where Lo represents the distance between supports), the bending load capacity is no less than 0.5 kN/m².

Panel Dimensions

• Standard Polyurethane Sandwich Panels:
  The effective width of most polyurethane sandwich panels is usually 1000 mm. However, lengths can be customized according to specific project needs, providing flexibility in design and installation.
• Interlocking Polyurethane Sandwich Panels:
  Panels with interlocking profiles (tongue-and-groove design) have an effective width of 950 mm. Thickness options for these panels range from 50 mm (standard) to 75 mm, 100 mm, and 150 mm, with customizable lengths.

Thermal Insulation and Resistance

One of the primary reasons for choosing polyurethane sandwich panels is their excellent thermal performance. The core material, rigid polyurethane foam, maintains its structure and strength even at temperatures up to 120°C. The low thermal conductivity, typically around 63 J (15 cal/m.h.k) at a density of 0.03 kg/m³, ensures efficient insulation. This makes these panels highly suitable for cold storage, cleanrooms, and other temperature-sensitive applications.

Polyurethane Roofing Panels

Polyurethane roofing panels are often used for industrial and commercial applications where insulation and weather resistance are crucial.

• Effective Width: 1000 mm
• Steel Thickness: The steel face thickness ranges from 0.47 mm to 0.7 mm, providing strength and durability.
• Core Thickness: Options include 50 mm, 60 mm, 75 mm, 80 mm, and 100 mm to meet different insulation requirements.

Polyurethane Wall Panels

Polyurethane wall panels come in two common styles: corrugated and flat panels.

• Corrugated Wall Panels: These panels feature subtle ridges for an elegant, textured look, offering both aesthetic appeal and functionality. The interplay of light and shadow on the corrugated surface creates visually dynamic effects, enhancing the design of the building facade.
• Flat Wall Panels: Sleek and minimalistic, flat wall panels present a clean and sophisticated finish, delivering a more uniform visual experience. The effective width of polyurethane wall panels varies from 500 mm to 1000 mm. The steel face thickness ranges from 0.4 mm to 0.7 mm, and the core thickness is typically 50 mm, 75 mm, or 100 mm.

Polyurethane Cold Storage Panels

Cold storage panels are specifically designed for freezer and refrigeration applications. They feature interlocking grooves, which improve the thermal insulation and airtightness at the panel seams. This makes them ideal for maintaining temperature stability in cold storage environments.

• Effective Width: Ranges from 950 mm to 1120 mm
• Steel Thickness: Between 0.4 mm and 0.7 mm, offering durability and protection against environmental factors.
• Core Thickness: Available in 100 mm, 120 mm, 150 mm, and 200 mm, ensuring superior insulation to maintain cold temperatures.

These panels are lightweight and aesthetically pleasing, addressing the challenges of temperature differentials in the cold storage industry. Modular designs allow for easy expansion or modification of the storage unit, and the panels can be disassembled and reinstalled elsewhere, making them a cost-effective solution.

Conclusion

Polyurethane sandwich panels are highly versatile, offering benefits such as thermal insulation, fire resistance, and structural integrity. Their specifications can be tailored to meet the specific needs of different projects, from roofing to wall cladding to cold storage applications. The adaptability and performance of these panels make them a preferred choice across multiple industries.

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This article offers a detailed breakdown of the various types of polyurethane sandwich panels available in the market today. For more insights and tailored solutions, please feel free to contact us!