Name: PU Foam Sandwich Panel
Brand: RaxPanel

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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PU Foam Sandwich Panel Selection & Engineering Guide

PU Foam Sandwich Panel combines high-strength composite skins with an engineered core to deliver superior thermal insulation, structural rigidity, and long-term durability for commercial applications.

💡 Pro Tip: Delamination Prevention Under Thermal Cycling
At RaxPanel, we utilize automated vacuum lamination with high-performance two-component polyurethane adhesives to ensure a bond strength that absorbs differential thermal expansion without micro-delamination.

1. How to Choose the Right Skin Alloy and Thickness

Outer skin selection governs mechanical impact resistance, corrosion barriers, and structural stiffness across different operating environments.

2. How Well Does the Core Insulate and Withstand Heavy Loads?

The core material acts as the web in an I-beam structure, handling shear stress and maintaining thermal R-value insulation:

Performance Metric	RaxPanel Engineering Standard	Application Advantage
Skin Spec	Engineered Aluminum / Composite Skin (0.3mm – 2.0mm / 1.0-3.0mm)	High tensile and impact resistance against road debris
Thermal Conductivity	~ 0.022 – 0.035 W/m·K	Consistent thermal R-value energy savings
Adhesive Layer	Two-component PU / Epoxy Adhesive	Delamination-free performance under thermal freeze-thaw cycles

3. Which Surface Finish Will Protect Your Panels for 20+ Years?

Factory roller coating specifies long-term color stability, UV protection, and resistance against industrial pollutants or marine salt spray.

4. How Fire-Safe and Soundproof Are These Panels?

🛡️ Compliance & Acoustic Isolation:

Fire Safety: Formulations comply with EN 13501-1 Class B-s1,d0 and GB8624 Class B1 building fire safety standards.
Sound Damping: Composite core attenuates noise transmission by 24 dB to 30 dB relative to solid metal sheets.

5. Where Are PU Foam Sandwich Panels Most Commonly Installed?

🚚 Vehicle Bodies & Trailers

Lightweighting and high-impact structural strength for mobile fleets.

🏢 Cold Rooms & Building Envelopes

Thermal R-value insulation and moisture-proof building enclosures.

6. How to Cut, Groove, and Seal Edges During Installation

Panels process easily on-site using standard CNC machinery, routers, or specialized edge profiles for airtight moisture sealing.

Frequently Asked Questions (FAQS)

1. What are the standard panel thicknesses, maximum lengths, and width options available for PU Foam Sandwich Panels?

Standard panel thicknesses range from 10mm up to 150mm. Standard widths include 1000mm, 1220mm, and 1500mm, with maximum single-sheet lengths up to 5800mm (5.8m) to fit ocean freight container shipping dimensions.

2. What are the primary engineering benefits of using PU Foam Sandwich Panels?

PU Foam Sandwich Panels deliver an exceptional stiffness-to-weight ratio, rot-proof moisture resistance, reliable thermal insulation, and dynamic fatigue endurance for high-stress applications.

3. How do these composite panels perform under high humidity and outdoor weathering?

The closed-cell core prevents water logging and condensation absorption, while pre-painted skins provide a 20+ year weatherability barrier against UV degradation.

4. What fire safety ratings and quality certifications do these composite panels meet?

Flame-retardant formulations meet EN 13501-1 Class B-s1,d0 and GB8624 Class B1 fire performance standards. Manufacturing quality is governed under ISO9001 management systems, with raw material performance verified under SGS and CE testing.

5. What surface coating options are available for exterior UV protection?

70% PVDF Fluorocarbon Coating PVDF coating provides a 20+ year exterior weatherability warranty against UV fading and acid rain. FEVE offers high gloss retention, while PE coating is cost-effective for indoor partitions.

6. Can these composite panels be CNC grooved, bent, or edge-sealed on-site?

Yes. Pre-painted skins can be V-grooved at 90° or 135° on the reverse side using standard CNC routers or hand tools, allowing manual edge folding into architectural cassettes without surface paint cracking.

7. How are large panel shipments packaged to prevent freight damage during ocean transit?

Panels are packed with protective PE film on both skins, separated by inter-sheet foam layers, and secured on heavy-duty export wooden pallets or CKD steel crates to prevent shipping damage during 20ft and 40ft container freight.