Name: Aluminum PU Sandwich Panel Manufacturer from China
Brand: RaxPanel
Availability: MadeToOrder

Aluminum PU Sandwich Panel

Aluminum PU sandwich panels combine two outer aluminum sheets with a rigid polyurethane (PU) foam core in a three-layer structure. The aluminum skins, typically 0.3-1.0 mm thick, are available in various alloys and can receive surface treatments such as fluorocarbon coating or anodizing. The PU foam core, with density commonly between 28-80 kg/m³, provides low thermal conductivity. Total panel thickness ranges from 10-120 mm, with standard widths up to 2600 mm and lengths reaching 12 meters.

The PU foam core delivers effective thermal insulation, reducing heat transfer and maintaining stable indoor temperatures for energy efficiency. The aluminum skins provide structural strength, corrosion resistance, and protection from rain and wind. The panels are lightweight, facilitating handling and installation, and both aluminum and polyurethane are recyclable materials.

Applications include cold storage rooms, refrigerated warehouses, and transportation vehicles such as refrigerated trucks, trailers, and ships where thermal insulation is critical. In building construction, the panels serve as exterior and interior wall cladding, roof panels, and facades for industrial, commercial, and agricultural structures.

The panels can be cut and shaped using high-precision Computer Numerical Control (CNC) machining. Many systems feature interlocking or snap-lock mechanisms for concealed fastening, creating a sleek appearance with hidden fixings. Customization options include dimensions, color, surface finish, and core density.

Your Trusted Supplier for Energy-Efficient Aluminum PU Sandwich Panels

As a manufacturer specializing in custom composite panel solutions, RaxPanel produces Aluminum PU Sandwich Panels from its facility in Hebei, China. Our vertically integrated production covers raw material sourcing through final panel fabrication, giving us direct control over panel quality and consistency.

We utilize a rigid polyurethane foam core between premium aluminum skins, a composition that delivers strong thermal insulation performance for building facades, roofs, cold storage rooms, and partitions. Panels are customizable in color, finish, core density, and dimensions to meet specific architectural and cold-chain requirements.

Every order is manufactured to your specifications. Contact our engineering team to discuss your project requirements.

Parameter	Specification / Value
Panel Dimensions
Total Thickness	10 mm – 120 mm
Width	Up to 2600 mm
Length	Up to 12 m
Aluminum Skin
Material Thickness	0.3 mm – 1.0 mm
Common Alloy Grades	1050, 1060, 1100, 3003, 3004, 3105, 5005, 5052, 5083, 6061, 6063
Surface Treatment	Fluorocarbon coating, Anodizing, Embossed, Matte, Glossy
Surface Color	Standard RAL colors, Customizable
Core Material
Type	Rigid Polyurethane (PU) Foam
Density	28 kg/m³ – 80 kg/m³
General Properties
Key Features	Lightweight, High Thermal Insulation, Corrosion Resistant, Weather Resistant, Fire Resistant
Primary Applications	Cold Storage Walls/Roofs, Refrigerated Truck Bodies, Building Facades & Cladding, Industrial Partitions
Processing & Installation
Fabrication	High-precision CNC Machining
Fastening System	Interlocking / Concealed Snap-Lock Mechanism

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Aluminum PU Sandwich Panel Selection & Engineering Guide

For projects requiring maximum thermal insulation efficiency per millimeter of thickness, Polyurethane (PU / PIR) foam cores represent the gold standard in composite panel engineering. Aluminum PU Sandwich Panels bond durable aluminum alloy skins onto a rigid closed-cell polyurethane foam core. At RaxPanel, our engineering team manufactures these panels to deliver established thermal insulation (λ ~ 0.020 – 0.023 W/m·K), significant weight reduction, and reliable structural integrity across extreme operating temperatures (-80°C to +110°C).

💡 Pro Tip: established R-Value Efficiency
Because rigid PU foam features the lowest thermal conductivity among all structural insulation foams (λ ~ 0.020 – 0.023 W/m·K), Aluminum PU panels achieve superior thermal resistance with thinner overall panel profiles. This saves floor space in cold storage rooms and reduces vehicle tare weight in refrigerated transport fleets.

1. How to Choose the Right Aluminum Alloy and Skin Thickness

The pre-painted aluminum skins (0.3mm to 2.0mm thickness) provide outer structural rigidity, corrosion barrier protection, and smooth aesthetic finishes:

1100 / 1050 Alloy: High ductility and formability; preferred for pre-insulated HVAC air ducting, indoor ceiling tiles, and cleanroom partitions.
3003 Alloy (Al-Mn): Higher tensile strength and dent resistance; standard choice for exterior building facades, cold storage envelopes, and commercial trailer walls.
5005 Alloy (Al-Mg): Exceptional salt-spray corrosion resistance; recommended for coastal processing plants, marine interiors, and high-humidity environments.

2. Why Polyurethane (PU) Delivers Maximum Insulation Efficiency

High-density closed-cell polyurethane foam core provides uniform thermal insulation and acoustic damping:

Performance Property	RaxPanel PU Core Specification	Engineering Advantage
PU Foam Core Density	40 kg/m³ to 60 kg/m³	Balanced lightweight structure with strong core shear stability
Thermal Conductivity (λ)	~ 0.020 – 0.023 W/m·K	Maximum energy savings for cold storage and HVAC ducting systems
Operating Temperature	-80°C to +110°C	Reliable performance from deep-freeze rooms to warm industrial ducts
Closed Cell Content	> 92% (Volumetric)	Prevents internal moisture ingress and maintains R-value thermal barrier

3. Which Surface Coating Is Best for Exterior UV Protection?

The roller-coated surface finish determines environmental durability and UV resistance:

PVDF Coating (70% PVDF Fluorocarbon Coating): 20+ Year exterior weatherability warranty against fading, chalking, and acid rain on building facades.
FEVE Coating: High gloss retention and vivid color durability for architectural features.
PE Coating: Cost-effective finish for indoor wall partitions, available in wood grain, stone, and solid metallic tones.

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

🛡️ Safety & Acoustic Performance:

Fire Resistance: Flame-retardant PU/PIR core formulations satisfy EN 13501-1 Class B-s1,d0 and EN 13501-1 Class B1 fire codes.
Acoustic Isolation: Polyurethane core dampens ambient noise transmission by 24 dB to 30 dB relative to solid metal sheets.

5. Where Are Aluminum PU Panels Most Commonly Installed?

❄️ Cold Storage & Freezers

Walk-in freezers, pharmaceutical cold rooms, and food processing plants requiring maximum thermal insulation.

🌀 HVAC Air Ducting & Cleanrooms

Pre-insulated air ducting panels and smooth cleanroom partitions requiring airtight thermal efficiency.

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

Aluminum PU panels machine easily on-site using standard CNC routers or hand tools:

V-Groove Corner Bending: Cut 90° V-grooves into the back skin to bend clean architectural corners without surface paint cracking.
Edge Protection: Edge sealing options include open edges, folded skin edges, or aluminum extrusions to prevent moisture ingress.

🏭 Factory-Direct Supply & Custom Fabrication
RaxPanel supplies custom-sized composite panels directly to project sites worldwide, with strict pre-dispatch quality control on every batch.

Frequently Asked Questions (FAQS)

1. What are the standard panel thicknesses, maximum lengths, and width options available for Aluminum PU panels?

Standard panel thicknesses range from 20mm up to 150mm (with 20mm commonly used for HVAC ducting and 50-150mm for cold storage). 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. Why is rigid Polyurethane (PU) foam core considered the top choice for thermal insulation?

Rigid PU foam features the lowest thermal conductivity among structural insulation foams (λ ~ 0.020 – 0.023 W/m·K), delivering maximum R-value insulation per millimeter of panel thickness and reducing energy consumption in climate-controlled environments.

3. What operating temperature range can Aluminum PU sandwich panels withstand?

RaxPanel Aluminum PU composite panels perform reliably across operating temperatures from -80°C (deep-freeze rooms) up to +110°C (warm industrial HVAC air ducts) without degradation of core adhesion or thermal efficiency.

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

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

5. What is the difference between PVDF, FEVE, and PE coatings for outdoor weatherability?

70% PVDF Fluorocarbon Coating-based PVDF (Polyvinylidene Fluoride) coating provides a 20+ year weatherability warranty against UV fading, chalking, and acid rain on exterior building facades. FEVE delivers high gloss retention for architectural landmarks, while PE (Polyethylene) coating is cost-effective for interior wall partitions and signage.

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

Yes. The pre-painted aluminum skins can be V-grooved at 90° or 135° on the reverse skin using standard CNC routers or hand tools, allowing manual edge folding into architectural cassettes without surface paint cracking. Edge sealing options include open edges, folded skin capping, or interlocking aluminum extrusion profiles.

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

Panels are packed with protective PE film on both aluminum skins, separated by inter-sheet foam layers, and secured on heavy-duty export wooden pallets or CKD (Completely Knocked Down) steel crates. This prevents surface scratching or edge impact damage during 20ft and 40ft container shipping.