Specifying OEM Glass Magnesium Cleanroom Sandwich Board Suppliers for Wholesale and Orders
Procurement of structural panels for controlled environments requires balancing high rigidity-to-weight ratios with strict dimensional stability. In high-precision assembly, the primary failure mode is rarely the material itself, but rather the delamination of the skins under thermal stress or repeated cleaning cycles. When the magnesium core lacks sufficient density, the expansion coefficient mismatch between the glass face leads to surface warping, which compromises the tolerance of the entire assembly.
Buyers must evaluate suppliers based on the core extrusion process and the consistency of the glass skin layup. A higher GSM glass skin increases the load-bearing capacity but adds significant weight, affecting the logistics costs of large-scale fitouts.
What Actually Determines Performance
The performance of a sandwich board is judged by the shear modulus of the core and the tensile strength of the adhesive. If the magnesium core density is inconsistent, the panel will exhibit localized deflection under point loads, which is unacceptable for equipment housing or modular flooring systems.
Higher kg/m³ density reduces the risk of impact crushing but increases cost per square meter.
Standard 1.5mm to 3.0mm glass skins provide the impact resistance needed for industrial-grade panels.
Epoxy-based resins are required to prevent delamination during sterilization cycles.
- Dimensional tolerance typically remains within ±0.5mm over a 2400mm span.
- Surface finish must be rated for cleanroom class compatibility to prevent out-gassing.
- Thermal expansion coefficients must be matched to ensure no de-bonding occurs under fluctuating HVAC-controlled conditions.
How It Is Built and What Changes
Manufacturing involves the extrusion of the magnesium core followed by the vacuum pressing of pre-impregnated glass skins. The temperature profile during the curing cycle is critical; if the heat rises too quickly, internal voids form in the core, leading to structural failure later when the panel is loaded.
Customization usually focuses on the core geometry and the surface treatment of the glass. For specialized applications, CNC-milled channels allow for integrated routing of wiring, though this increases the unit price due to the additional machining time.
Specification Range and Customisation
| Parameter | Standard Range | Custom Options |
|---|---|---|
| Total Thickness | 10mm - 50mm | Up to 100mm |
| Core Material | Cellular Magnesium Honeycomb | Specialty Alloy |
| Skin Type | Woven Glass Fiber | Carbon-glass hybrid |
| Flame Rating | Class A / B1 | Custom Fire Retardant |
What Can Be Customised What Cannot
Core geometry can be modified to accommodate specific mechanical-bearing requirements or internal-mounting hardware. However, the fundamental chemical properties of the magnesium core are fixed; altering the alloy composition would invalidate the fire resistance certifications provided by the supplier.
Surface finishes can be customized with anti-static coatings or antimicrobial layers, but the structural integrity remains dependent on the original skin-to-core bond strength.
Export Packaging and Handling
Large panels are sensitive to edge impact during transit, which can fracture the glass skins. Suppliers utilize reinforced wooden crates with internal bracing to prevent the panels from flexing during shipping, which would otherwise cause micro-cracking in the core.
Frequently Asked Questions
Are these panels suitable for ISO cleanroom environments?
Yes, provided the glass skins are treated with a non-gassing finish and the edges are sealed to prevent particulate release.
What is the typical lead time for custom core geometries?
Lead times generally range from 4 to 8 weeks depending on the tooling requirements and the volume of the order.
Can the magnesium core withstand corrosive cleaning agents?
The core is protected by the glass skins; however, if the skins are breached, the magnesium is susceptible to oxidation.
