PU Foam Sandwich Panels | Lightweight & Strong Thermal Insulation

PU Foam Sandwich Panel

The PU Foam Sandwich Panel combines a polyurethane foam core bonded to external skin layers, delivering thermal insulation and structural integrity in one component. The lightweight design results from the low-density polyurethane core and thin, high-strength skins, while the closed-cell foam structure minimizes heat transfer and provides excellent thermal performance.

External skins typically use Continuous Fiber Reinforced Thermoplastic (CFRT) sheets constructed from multiple unidirectional fiber tape layers at varying angles, creating high strength and toughness. The rigid, closed-cell polyurethane foam core resists moisture absorption while providing thermal and sound insulation. Core density can be customized according to application requirements.

A heat-resistant, low-temperature resistant adhesive bonds the skin layers to the foam core, ensuring structural integrity across environmental conditions. The environmentally friendly formula emits no volatile odors after curing. For additional structural support, materials like wood, aluminum profiles, or fiberglass can be embedded within the foam core during manufacturing.

Standard panels reach maximum dimensions of 12 meters length by 2.8 meters width, with customizable thickness from 10mm to 120mm. These panels serve refrigerated trucks, cold storage rooms, mobile cold units, caravan interiors, and wall/ceiling applications. They process easily using standard woodworking tools or Computer Numerical Control (CNC) machining for precision cutting, drilling, and shaping to meet specific design requirements.

Your Global Supplier for Durable PU Sandwich Panels

As a leading manufacturer, supplier, and exporter of polyurethane foam (PU) sandwich panels, RaxPanel is dedicated to providing high-quality and innovative solutions for the transportation and logistics industry. With over 20 years of experience since our founding in 2002, we specialize in custom composite panel solutions, serving clients across more than 30 countries from our production base in Hebei, China.

Our PU Foam Sandwich Panel is engineered with superior thermal insulation and durability, specifically designed for freezer cargo boxes. Because PU foam offers the best thermal insulation properties with very low thermal conductivity, it ensures excellent temperature control, making it ideal for maintaining the cold chain.

The integration of advanced materials and our in-house R&D allows us to produce panels that are not only tough and impact-resistant but also lightweight and cost-effective. With a daily output of over 1500 m², we combine cutting-edge technology with strict quality control to deliver reliable and sustainable solutions.

Choose RaxPanel’s PU Foam Sandwich Panel for Freezer Cargo Box and experience the difference in performance and efficiency.

Parameter	Specification
Skin Material	Continuous Fiber Reinforced Thermoplastic (CFRT) Sheet
Core Material	Rigid, Closed-Cell Polyurethane (PU) Foam
Core Density	Customizable (Standard range: 28–50 kg/m³)
Panel Thickness	10–120 mm (Customizable)
Panel Width	Max. 2.8 m
Panel Length	Max. 12 m
Surface Finish	Glossy / Matte (with optional protective film)
Thermal Insulation	Excellent (Closed-cell PU foam core)
Impact Resistance	High (Tough CFRT skin with multi-directional fiber layers)
Moisture Resistance	High (Closed-cell foam structure)
Adhesive Type	High-performance, heat- and低温-resistant environmentally friendly glue
Embedded Reinforcement Options	Wood, aluminum profiles, fiberglass profiles, sheet metal
Processing Compatibility	CNC machining, standard woodworking tools
Weight	Lightweight (Custom based on thickness and core density)
Applications	Refrigerated trucks, cold storage, mobile cold units, caravan interiors, wall/ceiling panels, flooring

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Frequently Asked Questions (FAQS)

What are PU foam sandwich panels and how are they structured?

PU foam sandwich panels are composite materials with a sandwich structure, consisting of a rigid polyurethane foam core between two skin layers. The foam core provides thermal insulation, while the skin layers (such as FRP, CFRT, aluminum, plywood, stainless steel, or prepainted steel) are bonded using polyurethane resin adhesive. Grooves are cut into the foam to ensure even adhesive distribution and prevent bulging or delamination.

What are the main advantages of PU foam sandwich panels?

These panels offer exceptional thermal insulation with thermal conductivity as low as 0.022 W/(m·K), helping maintain stable temperatures and reduce energy costs. They are lightweight yet strong, providing high rigidity, sound insulation, impact resistance, waterproof properties, and durability. When treated with flame-retardant materials, they also offer fire resistance.

In what applications are PU foam sandwich panels commonly used?

PU foam sandwich panels are widely used in refrigeration equipment (cold storage, refrigerated trucks), building construction (interior walls, exterior walls, roofs), vehicles (caravans, motorhomes, trailers), and industrial facilities (warehouses, purification workshops, clean rooms, agricultural structures, and modular buildings).

Can PU foam sandwich panels be customized to specific project needs?

Yes, RaxPanel offers extensive customization including dimensions (lengths up to 12m, widths up to 3.2m), core thickness (10-150mm), core densities, various skin materials, surface treatments (glossy, matte), custom colors (RAL), embedded reinforcement structures (aluminum or steel tubes for screw installation and wire layout), and precise CNC machining for specific shapes. Our daily production capacity exceeds 1500 m², ensuring reliable supply for bulk orders.

Are PU foam sandwich panels easy to install and maintain?

Yes, the panels are lightweight with standardized dimensions, allowing quick assembly in vertical or horizontal configurations. Precise CNC machining ensures accurate fitting with minimal on-site labor. Maintenance involves regular cleaning with mild detergent and water, plus periodic inspections for damage.

What technical support and documentation do you provide?

RaxPanel provides comprehensive technical data sheets with performance metrics including thermal conductivity, fire resistance ratings, and compressive strength. We supply CAD models, test reports, and material samples to help architects and engineers meet design and regulatory requirements, supported by our in-house R&D and over 20 years of industry experience.

How do you support distributors with pricing and availability?

RaxPanel ensures competitive pricing through efficient in-house manufacturing and high daily output, providing reliable product availability. We offer logistics and packaging solutions for global shipping to 30+ countries, helping distributors maintain inventory turnover and meet market demands.