Why Choose Our Flat Sandwich Panel
- Specialized flat sandwich panel production line, with consistent flatness control.
- The thickness, bonding strength, and surface flatness of each batch are precisely inspected.
- The thickness, core material, steel profile and length of the panel can be customized according to your project requirements.
- The product has been certified by international standards such as CE, UL, and FM, and provides fire resistance and thermal insulation performance test reports.
- We offer full-cycle services from structural calculation to installation guidance, and respond to technical inquiries within 24 hours.
Pupanel — Your Reliable Flat Sandwich Panel Supplier
As a leading supplier of flat panel sandwich panels, Pupanel, with over 10 years of experience, offers customized solutions.
We use certified core materials, combined with high-strength metal panels and precise edge banding, to ensure your boards deliver excellent insulation performance and long-term structural stability. Our products have been used in industrial and commercial projects across many countries and regions worldwide.
Classified by Core Material
With PU/PIR foam as the core material, it offers excellent thermal insulation performance, with a thermal conductivity of 0.022 W/(m·K). It is the most commonly used type in energy-efficient buildings, such as cold storage facilities and factories.
Its fire resistance rating can reach Grade A, combining thermal insulation with excellent fire safety, and is widely used in public and industrial buildings with strict fire protection requirements.
The core layer is a hexagonal honeycomb structure with an extremely high strength-to-weight ratio and excellent flatness, making it a core material for high-strength lightweight applications.
Features of Flat Sandwich Panels
Through structural design, it has achieved efficient material utilization. Under the same weight, its bending stiffness far exceeds that of solid plates of the same weight.
It not only bears the structural load, but the core layer usually also has multiple physical functions such as thermal insulation, sound insulation, fire prevention, or vibration reduction.
The overall weight of flat sandwich panels is significantly lower than that of traditional panels while delivering the same functionality, facilitating transportation and installation.
The panel and core materials can be customized to your specifications, enabling flexible adaptation to your diverse engineering needs.
Strict Quality Control Guarantee
The entire production process of our flat sandwich panels strictly adheres to the ISO quality management system. The core materials have all passed CE, UL, and other certifications. We can provide you with authoritative test reports, including professional indicators such as thermal conductivity and combustion grade to ensure that the products meet the specification requirements and have reliable quality.
Excellent Heat Preservation and Energy Conservation
The thermal conductivity of the core material we adopt is stably controlled within 0.022 W/(m·K). When used in conjunction with a dedicated precision edge banding system, it can significantly reduce up to 40% energy consumption of your building, which makes it particularly suitable for places with strict insulation requirements, such as cold chain warehouses and industrial plants.
Convenient for Construction
Through composite structure design, our flat sandwich panels maintain excellent bending stiffness while significantly reducing weight. In addition, its standard disassembly design enables rapid installation, significantly shortens your construction period, and reduces the impact of on-site construction on the surrounding area.
Applications of Flat Sandwich Panel
Our flat sandwich panels are widely used in the exterior walls and roof enclosures of industrial plants, offering fire resistance, thermal insulation, and sound insulation.
By using high-efficiency PIR/PU insulation core materials for cold storage facilities, their low thermal conductivity helps maintain a continuous low-temperature environment, reducing energy consumption and condensation.
Our flat sandwich panels are also frequently used in the walls and roofs of large warehouse buildings. They have excellent durability and impact resistance, which can be installed quickly.
The surface of the flat sandwich panel is smooth, seamless, and easy to clean. It is often used in high-standard environments such as laboratories and can meet strict cleanliness and aseptic control requirements.
As a core component of prefabricated buildings, our flat sandwich panels support rapid assembly and disassembly, significantly shortening your construction period. They are an ideal choice for temporary facilities and prefabricated buildings.
- Our Factory
- Project Case
Under the same weight, the bending resistance of our flat sandwich panels far exceeds that of solid panels, and they are much lighter in weight. In addition, it integrates functions such as heat retention, sound insulation, and vibration reduction, delivering comprehensive benefits.
We offer solutions of different grades, such as A-level non-combustible core materials (e.g., rock wool) and B1-level flame-retardant core materials with added flame retardants, combined with panels such as aluminized zinc steel plates, to meet fire protection code requirements for a range of applications, from ordinary industrial facilities to high-standard buildings.
We recommend using corrosion-resistant panels, such as aluminized zinc steel and stainless steel. At the same time, all joints must be sealed with weather-resistant sealant to ensure smooth drainage and address weather resistance.
Your assessment should comprehensively consider its structural performance, physical properties, fire resistance, thermal insulation performance, and durability. We can provide authoritative third-party test reports as quality assurance.
The lifespan of our flat sandwich panels typically ranges from 20 to 30 years. The key factors affecting its lifespan include the quality of the corrosion-resistant coating on the panel, the water resistance and dimensional stability of the core material, and whether the sealing treatment during installation is complete.
What is a Flat Sandwich Panel?
Pupanel flat sandwich panels are firmly combined by two layers of high-strength thin panels on the top and bottom, and a thick and light core material (such as honeycomb or foam) in the middle.
It can achieve extremely high bending stiffness and strength while maintaining extremely low weight, and it can also integrate functions such as heat and sound insulation. Therefore, it is a key material for achieving lightweighting and multi-functionality in the modern architectural field.
The Structure and Materials of Flat Sandwich Panels
Upper and Lower Panels
The selection of panels directly determines the structure’s load-bearing capacity, environmental resistance, and surface characteristics. Our panels are usually made of thin-layer materials with high strength and high rigidity.
The most common ones are metal panels (such as aluminum alloy and color-coated steel plates), which have excellent strength and processability.
In high-performance, demanding applications, fiber-reinforced composite material panels are widely used. They can provide excellent specific strength and specific stiffness at an extremely light weight.
Core Material
- Honeycomb Core Material: Typical materials include aluminium foil. This structure is an ideal choice for applications that require extreme lightweight and high rigidity, but it is costly and has limited adaptability to complex curved surfaces.
- Foam Core Material: It is easy to cut and adhere to complex curved surfaces, and can provide excellent heat insulation, sound insulation, and damping performance, which achieves a good balance among performance, cost, and processability. Its types include polystyrene foam, high-performance
What are the Advantages of Using Flat Sandwich Panels?
Balance Lightweight and High Rigidity
Our flat sandwich panels deliver extremely high bending stiffness and load-bearing capacity with minimal weight. Its specific stiffness (the ratio of stiffness to weight) and specific strength far exceed those of solid plates, making it a key technology for achieving weight reduction and efficiency gains in the construction industry.
Integrated with Multiple Functions
The flat sandwich panel not only provides structural load-bearing capacity but also offers heat insulation, sound insulation, vibration reduction, fire resistance, electromagnetic shielding, and other properties. Our sandwich panels can serve as enclosure structures and provide efficient insulation.
Enhance Impact Resistance
The porous honeycomb core of the flat-panel sandwich panel effectively dissipates energy upon impact, protecting the internal structure of your building.
Meet Your Customized Needs
The materials, thicknesses, and other aspects of the panels and core materials can be customized to your construction project’s specific requirements, ensuring prompt delivery for your special projects.
Improve Construction Efficiency
Our flat sandwich panels can typically be installed quickly, reducing your construction timeline. In addition, the convenience of transportation and installation, energy-saving benefits, and low maintenance costs throughout its life cycle, enabled by its lightweight design, make its overall economic efficiency remarkable.
Precautions for Using Flat Sandwich Panels
Avoid Bending the Panel
Although our core material supports the panel, if the panel is too thin or the core material’s supporting stiffness is insufficient, the panel may still experience local buckling or wrinkling under pressure. When designing, you need to determine the panel’s minimum thickness based on the load conditions.
Consider Environmental Durability
You must assess the aging effects of the usage environment (e.g., humidity, temperature, ultraviolet radiation, and chemical agents) on the panel, core material, and bonding layer. Some foam-core materials may absorb water, reducing performance. Differences in thermal expansion coefficients among materials can also cause thermal stress cracking.
Sheet Metal Connection
The connection of flat sandwich panels should avoid directly screwing fasteners into the core material. Instead, embedded parts or local filling reinforcement should be used. Any opening on the board will cut off the force transmission path, so you must carry out sufficient reinforcement design at the edge of the opening.
