How to Choose High-Quality Metal Sandwich Panels?

In modern building envelope systems, metal sandwich panels have become a mainstream choice for industrial steel structure workshops and public buildings. Because they have their composite structural performance advantages, customizable surface treatment processes, and modular installation efficiency.

The core of a high-quality metal surface sandwich panel lies in 3 key technical factors: a long-lasting protective outer layer, the structural stability of the core material, and precision control throughout the manufacturing and installation process.

What Are Typical Problems with Sandwich Panels?

If the production process lacks proper control, it can easily lead to panel performance degradation, cracking and bulging, which not only compromises the architectural aesthetics but also poses threats to structural safety and energy efficiency.

Rough Processing: Substandard bonding processes can cause bulging, cracking, and delamination, accelerating panel aging. Rough cutting and bending techniques may leave sharp burrs on the edges and expose the core material at cut points, creating channels for moisture infiltration.

Surface Material Defects: Inferior panels often use low-strength base materials prone to cracking or rebound deformation. The surface coating may be uneven in thickness, with noticeable color inconsistencies, and quickly chalk and fade under sunlight, looking worn out in just a couple of years.

Core Material Risks: Inadequate processing and poor material selection fail to ensure uniform core density and closed-cell rates. Poor workmanship leads to degraded performance, making the material more susceptible to moisture absorption and condensation in winter. This can corrode the internal structure and even cause the insulation layer to collapse, completely losing its thermal insulation function.

What Are Process Standards for High-Quality Metal Sandwich Panel?

Surface Material: We select high-strength base materials that, after composite forming, ensure a smooth, crack-free panel surface with excellent weather resistance. These panels maintain stable color even after prolonged exposure to sun and wind.

Core Material: High-pressure continuous foaming creates a dense and uniform internal structure. Polyurethane cores achieve over 97% closed-cell rate, offering outstanding thermal insulation, fire resistance, and water repellency. Rock wool fibers are directionally aligned, providing compressive strength and fire ratings far exceeding industry norms.

Intelligent Manufacturing System: Ultra-long double conveyor belts and fully automatic curing stations ensure the core material is fully matured, guaranteeing stable product performance. Automated cutting systems achieve millimeter-level precision, delivering smooth, burr-free edges.

Refined Treatment: During profiling, the panel surface is laminated with a protective film to prevent coating damage during production, transportation, and installation, ensuring a flawless finish upon assembly. Corona pre-treatment enhances the adhesion of the color-coated steel surface. In the bonding stage, precise glue control and pressure adjustment ensure a tight bond between the core and surface layers, preventing cracking and bulging.

Qingdao Xinguangzheng is your premier choice for steel structure buildings in China.