The Rock Wool Insulated Stainless Steel Sandwich Panel is a high‐performance composite building envelope element engineered to deliver superior fire resistance, thermal insulation, acoustic attenuation, hygiene, durability, and aesthetic versatility. Each panel integrates a non‑combustible, dimensionally stable rock wool (mineral wool) core between two precision‑formed stainless steel facings. The result is a rigid, lightweight module that accelerates construction schedules, reduces lifecycle energy costs, and enhances occupant safety and comfort.
Designed for both exterior and interior applications, the panel system supports sustainable building objectives by using recyclable metallic skins and a chemically inert, eco‑friendly core. Customization in thickness, width, length, surface finish, joint configuration, and accessory integration allows tailoring to architectural, industrial, and clean environment requirements.
Raw Materials & Component Structure
1 Stainless Steel Facings
- Grades: 304, 304L, 316, 316L, 430 (economy interior), duplex grades on request.
- Thickness (typical): 0.40–0.80 mm (custom up to 1.00 mm) per face.
- Surface Finishes: 2B, BA (bright annealed), No.4 hairline, brushed, embossed, anti-fingerprint, PVDF painted, powder coated, mirror, color‐tinted (PVD).
- Coatings / Treatments (option): Nano anti-fingerprint, PVDF fluorocarbon layer (>70% PVDF resin), antibacterial coating for food / pharma zones.
2 Core (Rock Wool / Mineral Wool)
- Fiber Type: Basalt‐derived spun mineral fibers.
- Density: 80–150 kg/m³ (standard 100–120 kg/m³ for balance of fire + mechanical performance).
- Thermal Conductivity (λ at 10–25°C): 0.035–0.045 W/m·K.
- Fire Classification: Non‑combustible, Euroclass A1 / GB Class A.
- Water Repellency: <1.0% moisture absorption by volume (treated fibers).
- Chemical Resistance: Inert to most acids/alkalis under typical atmospheric exposure.
3 Adhesive / Lamination Layer
- Type: High‑temperature resistant two‑component polyurethane or modified epoxy system formulated for mineral fiber substrates.
- Function: Uniformly bonds fibers to facings, providing composite shear strength and preventing delamination under thermal cycling.
4 Edge & Joint Options
- Sealed Edges: Stainless steel folded edge, PU injected edge sealing, or PVC trimming for improved moisture exclusion.
- Joint Geometry: Male–female tongue-and-groove, concealed fastening groove, or flat butt joint with cover strip.
- Gaskets (optional): EPDM / silicone for airtight / vapor‑tight assemblies.
Detailed Technical Parameters (Customizable)
| Parameter | Standard Range / Value | Notes / Options |
|---|---|---|
| Panel Thickness (overall) | 50, 60, 75, 80, 100, 120, 150 mm | Up to 200 mm special |
| Rock Wool Core Thickness | (Overall − 2 × skin) | Continuous lamination tolerance ±2 mm |
| Effective Width | 600 / 750 / 900 / 1000 / 1150 mm | Profiles per project |
| Length | 2.0 – 12.0 m (≤18 m special) | Transport constraints apply |
| Steel Facing Thickness | 0.40 – 0.80 mm | Balance cost vs. span |
| Density (Core) | 80 – 150 kg/m³ | Tailor structural & acoustic |
| Thermal Conductivity λ | 0.035 – 0.045 W/m·K | Lower value = better insulation |
| U-Value (100 mm) | Approx. 0.32–0.36 W/m²·K | Depends on λ & joints |
| Fire Rating | Up to 2–4 h integrity / insulation (tested config) | Dependent on thickness |
| Sound Reduction (Rw) | 28 – 35 dB | Higher density & thickness improve |
| Compressive Strength | ≥ 60–80 kPa @10% deformation | Higher density core increases |
| Shear Strength Core | ≥ 0.06–0.10 MPa | Adhesive selection critical |
| Linear Thermal Expansion (steel) | ~17×10⁻⁶ /K | Allow for movement in detailing |
| Flatness Tolerance | ≤ 2 mm per 1000 mm | Standard QA criterion |
| Squareness | ≤ 3 mm per 1000 mm | |
| Surface Finish | 2B / BA / Brushed / PVDF / PVD | Hygienic / decorative |
| Color (Coated) | RAL / custom | PVDF, powder, or PVD palette |
| Joint Air Leakage | ≤ 1.5 m³/h·m² @50 Pa (with gasket) | Airtight design option |
All parameters above are indicative; project‑specific test reports available on request.
Manufacturing Process
- Raw Material Inspection: Verify stainless steel coil thickness, mechanical properties, and surface finish; test rock wool density and fiber uniformity; check adhesive batch quality (viscosity, pot life).
- Uncoiling & Pre‑Treatment: Stainless coils uncoiled, leveled, degreased, and (if required) chemically treated to enhance adhesion; protective film applied for sensitive finishes.
- Profiling / Roll Forming: Metal facings roll‑formed to create micro‑ribs, tongue‑and-groove edges, or concealed fixing channels improving panel stiffness and joint integrity.
- Core Preparation: Rock wool boards cut to size, fiber orientation adjusted (vertical stratification optional) to optimize compression and fire barrier continuity.
- Adhesive Application: Metered continuous spread or bead pattern onto inner skin; controlled mixing ratio ensures optimal curing.
- Assembly & Lamination: Rock wool placed, top skin applied; composite passes through precision press or continuous double belt laminator applying pressure & heat for uniform bond.
- Edge Sealing / Trimming: Folded metal edges or PU injection creates sealed perimeter; trimming ensures dimensional accuracy.
- Curing: Panels allowed to reach specified adhesive cure strength (initial set within minutes; full cure per formulation).
- Quality Control: Dimensional checks, bond integrity (peel / shear tests), surface inspection, flatness, density verification, fire barrier continuity sampling.
- Packaging: Protective film, corner shields, strapped bundles with moisture barriers to preserve surface finish during transport and storage.
Application Scenarios
- Industrial Buildings: Plant enclosures, equipment housings, high‑temperature process zones needing fire separation.
- Commercial & Public Facilities: Malls, transit hubs, atriums—panels deliver clean aesthetics with fire safety.
- Clean Rooms & Hygienic Areas: Pharmaceutical, food processing, electronics assembly—stainless finish resists corrosion and allows rigorous sanitation.
- Cold & Controlled Environments: Supplementary insulation for chilled distribution centers (use thicker cores for lower U‑values).
- Energy & Infrastructure: Power station control rooms, data center exterior shells needing non‑combustible cladding.
- Partition & Fire Walls: Internal compartmentation where fire integrity and rapid installation are critical.
- Renovation / Over‑Cladding: Lightweight retrofit over existing substrates to upgrade energy performance and façade appearance.
Sustainability & Compliance: Recyclable metals, low VOC adhesives, non‑ozone depleting manufacturing, and alignment with green building criteria (LEED / BREEAM points for energy efficiency & material attributes).
Installation Guidelines
1 Pre‑Installation Preparation
- Confirm structural support (steel framework / sub‑girts) alignment and load capacity per design.
- Store panels flat, off ground, under protective sheeting; avoid prolonged UV exposure to protective films.
- Inspect for transit damage prior to lifting.
2 Tools & Hardware
- Stainless or coated self‑drilling fasteners with thermal break washers as specified.
- Silicone / hybrid sealants (neutral cure), EPDM gaskets for weather lines.
- Lifting clamps or vacuum lifters with soft pads; non‑abrasive gloves.
3 Panel Fixing Sequence
- Setting Out: Establish datum line; verify plumb & level of primary structure.
- Bottom Support / Starter: Install starter flashing / base channel with drainage allowances.
- First Panel Placement: Position, align vertical edge; temporarily clamp.
- Fastening: Insert fasteners at concealed groove or surface (per design). Maintain spacing per engineering (e.g., 300–600 mm along supports).
- Joint Engagement: Engage tongue-and-groove or gasketed male–female joint of subsequent panel; check compression uniformity.
- Sealing: Apply sealant in joint cavities where specified (continuous bead with no voids).
- Openings & Penetrations: Frame with stainless trims; seal to maintain fire and air integrity.
- Flashings & Accessories: Install corner, eave, ridge, parapet flashings; ensure overlaps ≥ 75 mm with sealed laps.
- Final Inspection: Check alignment, joint tightness, fastener torque, protective film removal sequence (remove after completion but before prolonged sun exposure).
4 Safety & Handling
- Use mechanical lifting for panels >6 m to avoid bending stress.
- Minimize cutting on site; if required, use stainless-compatible tools, deburr edges, re‑seal coatings.
- Follow relevant fire and fall protection regulations; maintain clean work areas to prevent surface scratching.
5 Maintenance Recommendations
- Annual inspection for sealant integrity, fastener corrosion, panel surface cleanliness.
- Wash surfaces with neutral pH detergent; avoid chlorides or abrasive pads.
- Promptly repair impact dents and replace compromised gaskets to preserve insulation and fire separation.
Value Proposition Summary
- Fire Safety: Non‑combustible A1 core + stainless facings for robust compartmentation.
- Thermal Efficiency: Low λ mineral wool enhances energy performance, reducing HVAC loads.
- Acoustic Comfort: Dense fibrous core attenuates airborne noise for productive interiors.
- Durability & Hygiene: Corrosion‑resistant stainless surfaces support demanding sanitary regimes.
- Customization: Flexible in dimensions, finishes, joint types, and accessory integration for tailored solutions.
- Rapid Installation: Modular precision components lower labor hours and accelerate project completion.
- Sustainability: Recyclable content, low VOC fabrication, and contribution to green building credits.
Ordering & Technical Support
Foshan Queencore Metal Co., Ltd. provides engineering consultation, thermal & fire performance data sheets, shop drawings, and on‑site technical guidance. Submit project specifications (target U‑value, fire rating, spans, environmental conditions, finish requirements) for optimized panel configuration and quotation.
