Large Polyurethane Wall Panels

Product Introduction

After more than 6 months of weathering test, all performances are stable and can last as long as the building. The compressive strength of polyurethane composite board reaches more than 180kp, the board has good temperature resistance and no deformation. After the test of the National Fireproof Building Materials Quality Supervision and Inspection Center, all indicators reach GB8624B1 level, which belongs to thermosetting materials. The carbonization of olefins turns into ashes, and it extinguishes itself when away from the fire, without dripping or extension. The polyurethane composite board is foamed under high pressure, and the product complies with the International Convention for the Protection of the Ozone Layer and meets European environmental protection standards. It does not contain formaldehyde and is not eroded by microorganisms.

Product Specifications

Features

The sandwich panel products produced by our company integrate multiple excellent properties and are the ideal choice for modern building enclosure systems. The products adopt unique fastener encryption fixing technology, and each connection point is precisely calculated and reinforced. In terms of thermal insulation, the use of high-density polyurethane core material and three-layer sealing design has significant energy-saving effects. At the same time, the product has excellent noise reduction and sound insulation performance through multi-layer composite structure and microporous sound absorption technology.

Large polyurethane wall panels have become a preferred choice in modern construction due to their superior thermal insulation, lightweight structure, and ease of installation. These panels are widely utilized in industrial, commercial, and cold storage buildings to optimize energy efficiency and structural performance. This article provides a thorough technical overview of large polyurethane (PU) wall panels, detailing their material composition, engineering principles, compliance with industry standards, installation best practices, and relevant regulatory considerations.

What Are Large Polyurethane Wall Panels?

Polyurethane wall panels consist of a rigid polyurethane foam core sandwiched between two protective facings, typically made of galvanized steel or aluminum sheets. The panels are manufactured in large sizes to minimize joint lines and expedite installation, resulting in enhanced structural integrity and insulation continuity.

Key Characteristics:

• Core Material: Rigid polyurethane foam with closed-cell structure

• Density: Typically ranges from 35 to 45 kg/m³

• Panel Thickness: Commonly between 50 mm to 150 mm

• Thermal Conductivity (λ): Approximately 0.022–0.028 W/(m·K)

• Facing Materials: Galvanized steel, aluminum, or pre-painted steel, thickness 0.4–0.7 mm

• Panel Dimensions: Width up to 1200 mm, length customizable up to 12 meters or more

Engineering Principles and Performance

Thermal Insulation

The closed-cell structure of polyurethane foam offers low thermal conductivity, providing excellent insulation that reduces heat transfer through building envelopes. This contributes directly to energy savings in heating and cooling.

Structural Strength and Stability

Large panels reduce the number of joints and fasteners, increasing the overall stability of the wall system. The facing materials provide mechanical protection and resist environmental wear.

Fire Performance

Polyurethane foam is combustible; thus, fire-retardant additives are typically incorporated to achieve fire performance ratings such as Class B-s1, d0 according to EN 13501-1 standards, depending on formulation and panel construction.

Moisture Resistance

The closed-cell foam resists water absorption, limiting moisture ingress that could otherwise compromise insulation properties and structural integrity.

Industry Standards and Regulatory Compliance

• EN 14509: Factory-made double skin metal faced insulating panels — specifications.

• ASTM C591: Standard specification for core materials for structural sandwich panels.

• EN 13501-1: Fire classification of construction products.

• ISO 9001: Quality management for consistent manufacturing processes.

• Local Building Codes: Compliance with national fire safety, energy efficiency, and environmental regulations is mandatory.

Installation Considerations and Best Practices

• Substrate Preparation: Ensure wall frame or support structure is level and clean.

• Panel Handling: Use mechanical lifting equipment for large panels to avoid damage.

• Joint Sealing: Use compatible sealants and gaskets to ensure airtightness and thermal continuity.

• Fastening: Employ manufacturer-recommended screws and clips with proper spacing.

• Thermal Expansion: Allow for panel expansion and contraction due to temperature variations.

• Safety: Follow fire safety guidelines during storage and installation to prevent fire hazards.

Example: Application in Cold Storage Facility

A cold storage facility installed 1000 m² of large polyurethane wall panels, 120 mm thick, with pre-painted galvanized steel facings. The panels provided a thermal resistance (R-value) of approximately 5.5 m²·K/W, significantly reducing refrigeration energy consumption. The reduced installation time due to large panel size resulted in a 25% labor cost saving compared to smaller modular panels.

FAQs on Large Polyurethane Wall Panels

Q1: How do large polyurethane panels compare with mineral wool panels?
A: Polyurethane panels offer better thermal insulation (lower λ value) and lighter weight, while mineral wool panels provide superior fire resistance and sound insulation.

Q2: Are polyurethane panels environmentally friendly?
A: Modern formulations use low Global Warming Potential (GWP) blowing agents and many panels are recyclable, but environmental impact depends on specific materials and manufacturing processes.

Q3: What is the typical lifespan of large polyurethane wall panels?
A: With proper installation and maintenance, panels can last 25–35 years without significant performance degradation.

Q4: Can large panels be customized in size and thickness?
A: Yes, panel dimensions and thicknesses can be tailored to project requirements, improving design flexibility and efficiency.

Q5: What fire performance can be expected from these panels?
A: With fire retardants, many panels achieve Class B-s1,d0 rating; however, panels are not typically suitable for high-risk fire zones without additional fire protection.

Conclusion and Call to Action

Large polyurethane wall panels represent a high-performance, cost-effective solution for modern construction demands, delivering excellent thermal insulation, structural benefits, and installation efficiency. Their compliance with international standards and adaptability across applications underscore their value.

We invite building designers, engineers, and procurement professionals to contact us for expert guidance on selecting and specifying large polyurethane wall panels that meet your project’s technical, regulatory, and budgetary requirements. Reach out today for tailored consultations, detailed product data, and competitive pricing.