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Steel Facings PU Foam Core Sandwich Panels

TOPOLO’s production line for one-piece composite panels overcomes the limitations of traditional polyurethane sandwich panels—such as fixed dimensions and simple structural designs—enabling more flexible, customized manufacturing.

Unlike the conventional foam sandwich panels commonly available on the market, which are manufactured using the Continuous Injection Method, TOPOLO adopts a unique high-pressure molding process combined with large-tonnage vacuum lamination technology. First, high-quality closed-cell polyurethane (PU) foam is precisely cut into standardized dimensions. Then, using high-strength industrial structural adhesive, perfectly flat carbon steel sheets are seamlessly bonded with the PU core under controlled temperature and pressure, forming a highly integrated laminated composite panel with exceptional bonding strength and dimensional stability. By precisely controlling lamination pressure, adhesive application, curing time, and the production environment, a stable and reliable bond between the steel sheet and the PU core is ensured, effectively preventing issues such as delamination, warping, cracking, and dimensional deviations often associated with traditional processes.

Surface Material Options

Galvanized Steel (GI) Sheet

Features a pure zinc coating formed on the steel surface via the hot-dip galvanizing process.

Galvalume Steel (GL) Sheet

Also produced via a hot-dip process, featuring a surface coating of aluminum-zinc alloy.

PPGI/PPGL) Steel Sheet

Features a colored coating system (primer and topcoat) applied over a galvanized or galvalume steel substrate.

Galvanized/Galvalume Steel Facing PU Foam Core Sandwich Panels

Sturdy and durable, with excellent cost-effectiveness.

PPGI/PPGL Steel Facing PU Foam Core Sandwich Panels

Features a high-performance coating, combining aesthetic appeal with dual-layer corrosion protection.

Application of Steel PU Sandwich Panels in Modular Structures

One of the most representative applications for steel-faced polyurethane sandwich panels is modular construction. Modular construction utilizes prefabricated sandwich panel components to significantly streamline on-site workflows, shorten installation times, and effectively reduce labor costs. Furthermore, modular structures offer the advantages of flexible disassembly, rapid relocation, and reassembly, allowing for adjustments and expansions based on specific usage requirements.

Learn more: https://topolocfrt.com/steel-pu-sandwich-panels/

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Polyurethane Foam Sandwich Panels

As a professional flat sandwich panel manufacturer, TOPOLOGROUP relies on rich manufacturing experience, advanced production equipment and excellent technology to customize PU sandwich panels for enterprises and individuals around the world. These panels have shown reliability and stability in local engineering projects.

Skin Types of Polyurethane Foam Sandwich Panels

When designing PU sandwich panels, a wide variety of surface materials can be taken into account. Relying on high-performance adhesives, polyurethane foam cores can be used with different surface materials, such as metal (aluminum, steel), plastic (FRP, CFRT), so that makes the final panel meet different application requirements. If you require unique surface materials to be applied to PU sandwich panels, we will custom make these panels for you.

FRP Skin PU Panels

CFRT Skin PU Panels

Aluminum Skin PU Panels

Coated Steel Skin PU Panels

Common Application of PU Foam Sandwich Panels

Truck & Trailer Bodies

Used in the bodies of refrigerated trucks and insulated trucks, etc., to help maintain a low temperature environment and ensure the transportation and storage of perishable items.

Modular Buildings

Used as exterior wall panels, roof panels and interior wall panels, especially suitable for buildings that require insulation, such as cold storage, refrigerated warehouses, offices and commercial buildings.

Agricultural Greenhouses

Used in greenhouses and agricultural buildings, it provides excellent thermal insulation performance, helps regulate indoor temperature and prolongs the crop growing season.