As a composite material solution offering both performance and cost advantages, coated steel facing PET foam core sandwich panels are increasingly becoming the material of choice for builders and manufacturers seeking to construct durable, lightweight, and cost-effective structures. These composite sandwich panels are widely used in both indoor and outdoor applications.
Basic Specifications
| Skin Material | GI (Galvanized ) steel sheet GL (galvalume ) steel sheet PPGI (pre-painted galvanized) steel sheet PPGL (pre-painted galvalume) steel sheet |
| Total Thickness | 10-150mm. |
| Steel Sheet Thickness | 0.12-3.0mm. |
| Width | 600-1500 mm |
| Length | ≤12m |
| Steel grade | DX51D+Z, DX52D+Z, DC51D+Z, DC52D+Z, S350GD+Z, etc. |
| Surface Treatment | Regular spangle Minimized spangle Spangle-free PE (polyester) PVDF (fluorocarbon) |
| PET Foam Density | 60~300kg/m³. |
Structural Diagram
PET Foam
PET foam core is an eco-friendly, recyclable material characterized by excellent rigidity, dimensional stability, and negligible water absorption, making it an effective alternative to traditional core materials like wood and plywood. Unlike wood, PET foam does not rot, swell, or degrade in performance due to moisture; it also offers the advantages of light weight, ease of processing, and long-term stability.
TOPOLO offers PET foam cores in various density grades, allowing for flexible selection based on structural strength, thermal insulation requirements, weight constraints, and the application environment. High-density PET foam is suitable for structures requiring superior load-bearing capacity and impact resistance, whereas low-density PET foam is better suited for applications where lightweight properties and cost-efficiency are prioritized.
Virgin vs. Recycled
Virgin PET Foam
Manufactured from 100% virgin polyethylene terephthalate (PET) resin.
Recycled PET Foam
Produced from recycled PET materials using advanced manufacturing processes; its performance characteristics are essentially identical to those of the virgin material.
Steel Facing
The primary advantages of using coated steel for the outer skin lie in its high strength, high rigidity, and the availability of mature, large-scale production capabilities. Compared to aluminum alloys, steel offers superior mechanical strength and lower raw material costs, making it an ideal choice for projects with stringent requirements regarding structural integrity and cost control.
Although steel lacks the inherent corrosion resistance of aluminum, its weather resistance can be significantly enhanced through galvanization, anti-rust coatings, and surface treatment technologies, enabling it to meet the demands of long-term outdoor use. Furthermore, steel skins provide excellent impact resistance, effectively protecting the internal foam core and extending the overall service life of the structure.
Surface Material Options
TOPOLO selects premium substrates from top-tier steel mills, offering a variety of high-quality coated carbon steel sheets as facings for sandwich panels.
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.
Applications in Modular Structures
Construction
PET foam sandwich panels are widely used in modular construction and prefabricated structures. Their lightweight nature reduces transportation and installation costs while shortening construction timelines. Examples include mobile homes, container-based buildings, and temporary structures.
- Exterior wall panels and interior partition panels.
- Roofing panels and suspended ceiling systems.
- Door panels, movable partitions, and decorative panels.
Vehicle Manufacturing
Lightweight PET foam core materials are ideally suited for constructing the bodies of various dry-freight trucks and trailers.
- Vehicle body wall panels.
- Vehicle body door panels.
- Vehicle body roof panels.
- Vehicle body partition panels.
Industrial Equipment Enclosures
PET foam sandwich panels are also an ideal choice for industrial equipment requiring dust and noise isolation, as well as improvements to the working environment.
- Protective enclosures for industrial equipment.
- Soundproof booths and cleanroom enclosures.
- Machinery and equipment housings.
- Production line partition walls.
- Control room and operator station modules.