Name: Building Sandwich Panel
Brand: RaxPanel

Building Sandwich Panel

Building sandwich panels combine a polypropylene honeycomb core with outer skin layers, typically Continuous Fiber Reinforced Thermoplastic (CFRT) sheets. The honeycomb structure, approximately 95% air, delivers exceptional strength-to-weight ratios while maintaining structural integrity across temperatures from -40°C to +80°C.

The polypropylene core fuses to skin layers through glue-free bonding under heat and pressure, eliminating adhesives. CFRT skins may include multiple unidirectional tape layers and protective films for enhanced bonding and scratch resistance. Panels resist moisture, corrosion, and chemicals while remaining fully recyclable.

Available thicknesses range from 5mm to 120mm, with maximum dimensions reaching 2.8 meters wide by 12 meters long. Core densities typically span 60-100 kg/m³, with compressive strength values from 1.47 to 2.6 MPa. The thermoplastic nature enables CNC machining, thermoforming, and bending without delamination concerns.

Applications include commercial vehicle bodies, mobile homes, transportation flooring, marine decks, architectural partitions, and building formwork. Surface treatments offer glossy or matte protective films, embossing, and custom paint coatings. UV protection through carbon black additives maintains mechanical properties in outdoor environments.

Aluzinc Sandwich Panel

A composite panel constructed with a zinc-aluminum alloy coated steel sheet, known as Aluzinc. This coating provides excellent corrosion resistance and superior heat reflectivity. The panel combines these durable facings with a structural insulating core, ensuring high strength and a long service life.

Compact Laminate HPL Panel

A self-supporting, high-pressure decorative panel made from multiple layers of kraft paper saturated with phenolic resin. Its high-density, non-porous surface delivers excellent impact and scratch resistance, along with being completely water-resistant, dimensionally stable, and easy to clean.

EPS Sandwich Panel

A lightweight and cost-effective structural panel utilizing an expanded polystyrene (EPS) foam core. This material provides good thermal insulation and sound absorption properties. Its composition offers a high strength-to-weight ratio, making it an economical choice for insulated constructions.

Exterior Wall Cladding Panel

A protective outer layer for building envelopes, designed for superior weather and UV resistance. This material provides a durable, low-maintenance building facade with enhanced thermal performance. It is available in various textures and finishes to create a distinct aesthetic appeal.

Hollow Plastic Formwork

A reusable formwork system made from polypropylene, featuring a hollow internal structure. This design makes it lightweight yet high-strength and waterproof. It offers exceptional durability with high reusability of over 50 cycles and requires no release agent due to its non-stick surface.

PIR Sandwich Panel

A high-performance insulated panel with a rigid polyisocyanurate (PIR) foam core. It is defined by its superior fire resistance and excellent fire performance rating. The core also offers high thermal efficiency, good compressive strength, and long-term structural stability.

Plywood Foam Core Panel

A composite panel constructed with plywood face sheets bonded to a rigid foam insulation core. This structure combines the high structural strength and impact resistance of plywood with the lightweight and thermal insulating properties of the foam, creating a versatile building material.

PUR Sandwich Panel

A high-efficiency insulated panel featuring a rigid polyurethane (PUR) foam core. It is characterized by its excellent thermal insulation properties and a very low thermal conductivity coefficient. This material is lightweight with good bonding strength and high mechanical resistance.

Rockwool Sandwich Panel

A non-combustible composite panel with a core made of high-density stone wool (rockwool). Its defining characteristics are excellent fire resistance and superior acoustic insulation properties. The structural mineral wool core also provides good thermal performance and high compressive strength.

Snap N Lock Insulated Panel

An insulated panel system featuring a patented interlocking joint design. This allows for fast, easy installation without additional fasteners. The unique locking mechanism creates a continuous, thermally efficient, and airtight seal, ensuring high structural performance and insulation continuity between panels.

Stainless Steel Sandwich Panel

A high-performance panel featuring stainless steel skins bonded to a rigid insulating core, engineered for maximum durability. Its defining characteristics are superior corrosion resistance, a non-porous hygienic surface that is easy to clean, and excellent fire resistance properties for demanding environments.

Z Lock Insulated Panel

Z Lock Insulated Panel is a three-layer sandwich construction featuring corrugated steel sheets on both sides with an insulating foam core, typically EPS (expanded polystyrene). The distinctive Z-shaped interlocking system creates secure, wind-resistant connections between panels through a spike-and-groove mechanism.

Building Sandwich Panels: Your Trusted Supplier for Eco-Friendly Solutions

RaxPanel, a leading Chinese manufacturer of Building Sandwich Panels, has over 20+ years of experience in the production of high-quality composite panel solutions. Our panels feature a unique sandwich structure with a polypropylene honeycomb core, offering exceptional lightweight properties, durability, and full recyclability. With a daily output of 1500+ m² from our Hebei-based production facilities, we deliver reliable, high-performance, and eco-friendly panels tailored to diverse applications. These applications include:

construction
logistics
transportation
industrial use

As a direct manufacturer with in-house R&D and design capabilities, we ensure precise customization in size, thickness, and surface finish to meet specific project needs. Our Building Sandwich Panels are known for their excellent chemical resistance, impact strength, thermal insulation, and ease of processing—whether die-cutting, CNC machining, or bending. Built on a philosophy of sustainability and innovation, we provide cost-effective, rapid, and high-quality solutions for clients across 30+ countries. Contact us to discuss how we can meet your project requirements with precision and efficiency.

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Other Products You May Like

Aluminum Sandwich Panel

GRP Sandwich Panel

CFRT Sandwich Panel

Building Sandwich Panel Selection & Engineering Guide

Selecting the right specification for Building Sandwich Panel depends on matching structural load requirements, environmental exposure, and thermal R-value insulation goals. At RaxPanel, our engineering team manufactures high-performance composite panels to deliver durable, moisture-resistant, and energy-efficient solutions for industrial and commercial projects worldwide.

💡 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 handles shear stress and maintains thermal R-value insulation across operating temperature ranges:

Performance Metric	RaxPanel Engineering Standard	Application Advantage
Outer Skin Spec	Pre-Painted Aluminum / GRP Sheet (0.3mm – 2.0mm)	High tensile strength and corrosion resistance
Thermal Conductivity	~ 0.020 – 0.038 W/m·K	Consistent R-value insulation & energy savings
Bonding Adhesive	Two-Component Polyurethane / Epoxy Adhesive	Delamination-free performance under 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 Building Sandwich Panels Most Commonly Installed?

🏢 Commercial & Industrial Buildings

Exterior wall cladding, cleanroom partitions, and insulated roof envelopes.

🚚 Cold Storage & Transport Fleets

Refrigerated truck bodies, cold storage rooms, and RV composite walls.

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 Building 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 Building Sandwich Panels?

Building 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.