Key Considerations for Selecting a Rock Wool Sandwich Panel Manufacturer

1.Product Quality and Technical Standards
'Rock Wool Core Performance
 Fire Rating: Prioritize Class A non-combustible materials (e.g., GB8624-2012 A1 standard) to meet fire safety requirements.
 Thermal Conductivity: Typically ≤0.040W/(m·K)—the lower the value, the better the insulation.
 Density and Strength: Rock wool density should be ≥120kg/m³, with compressive strength ≥40kPa to prevent deformation.
'Panel Material
 Metal Panels (e.g., color-coated steel, stainless steel) should have sufficient thickness (≥0.4mm), coating (galvanized, PVDF), and   corrosion resistance.
 Surface Finish: Check for smoothness, coating adhesion, and color consistency.
'Environmental Certifications
 Verify ISO 14001 compliance and ensure rock wool meets ROHS directives (free of asbestos, formaldehyde, etc.).

2. Manufacturer Qualifications and Industry Experience
'Production Certifications
 Required licenses: National Industrial Product Production License, fire test reports (CNAS-certified), third-party quality reports (e.g., SGS).
'Project Experience
 Prefer manufacturers with large-scale project experience (e.g., airports, stadiums, industrial plants) and request case studies.
'R&D Capabilities
 Check for patented technologies (e.g., moisture-proof, crack-resistant) or involvement in industry standards.

3. Production Process and Equipment
'Automation Level
 Fully automated production lines (e.g., Italian Promau equipment) ensure consistency and precision.
'Process Details
 Focus on bonding techniques (e.g., polyurethane adhesive high-pressure lamination) and edge sealing (waterproof design).

4. After-Sales Service and Delivery Capability
'Customization Services
 Confirm availability of non-standard sizes, special cuts, and reinforced joints (e.g., door/window openings).
'Logistics and Lead Time
 Assess storage capacity and logistics partners to avoid delays.
'Warranty & Support
 Standard warranty (5–10 years), response time (e.g., 24-hour support), and installation guidance.

5. Cost and Cost-Effectiveness
'Comparative Pricing
 Avoid cheap options—calculate total cost per unit area (including shipping/installation) to prevent high maintenance costs later.
'Payment Terms
 Clarify deposit ratio, inspection process, and penalty clauses.

6. On-Site Inspection Recommendations
'Factory Visit
 Inspect raw material storage (moisture-proof packaging), production workflow (QC checks), and finished goods management.
'Sample Testing
 Request samples for flame resistance, water immersion, and compression tests.

7. Additional Considerations
'Contract Details
 Specify technical tolerances (e.g., thickness deviation ±2mm), liabilities, and acceptance criteria (per GB/T 23932-2009).
'Regional Adaptability
 Coastal areas require salt spray-resistant panels; cold regions need low-temperature stability.

Summary: Create a checklist (fire rating, budget, timeline), shortlist 3–5 qualified manufacturers, and compare technical proposals, pricing, and after-sales service. Industry leaders (e.g., Rockwool, Saint-Gobain, JinYu Star) are recommended for long-term reliability.