Precision Manufacturing Process of Mineral Fiber Boards

Mineral fiber boards, widely used in commercial, industrial, and institutional spaces, are engineered through a sophisticated production process to achieve exceptional fire resistance, acoustic performance, and durability. At Shijiazhuang Beihua Mineral wool board co., ltd. we combine advanced technology with rigorous quality control to deliver premium-grade products. Below is a detailed breakdown of our manufacturing workflow:

1. Raw Material Preparation

• Core Ingredients: High-purity basalt rock, quartz, and industrial-grade mineral slag.

• Binder System: Thermosetting resins (formaldehyde-free) and stabilizing additives.

2. Production Stages

Stage 1: Melting & Fiberization

Raw materials are fed into a high-temperature cupola furnace, heated to 1,500°C (2,732°F) until molten. The liquid mineral mixture is then fiberized using centrifugal spinning technology, producing fine, interwoven mineral fibers with diameters of 4-7 microns.

Stage 2: Mat Formation

• Fiber Layering: Fibers are evenly distributed onto a conveyor belt to form a uniform loose mat.

• Resin Application: Binders are sprayed onto the fiber mat via automated nozzles, ensuring consistent adhesion.

Stage 3: Pressing & Curing

The resin-coated mat enters a dual-stage curing oven:

• Pre-Drying: 180°C (356°F) for 15 minutes to eliminate moisture.

• High-Temperature Curing: 220°C (428°F) for 20 minutes to activate resin polymerization, achieving a dense, stable board structure with a density range of 220-350 kg/m³.

Stage 4: Precision Cutting

• CNC Machining: Laser-guided cutting systems trim boards to exact dimensions (tolerance: ±0.5mm).

• Edge Profiling: Customizable edges (e.g., tegular, bevelled) are shaped for seamless installation.

Stage 5: Surface Treatment

• Coating: Boards are coated with an acrylic or polymer-based layer for enhanced moisture resistance.

• Embossing: Heat-pressed textures (e.g., smooth, wood grain, perforated) are applied for aesthetic versatility.

3. Quality Assurance

• Density Consistency: X-ray scanning ensures uniform density distribution.

• Fire Safety: Certified to Class A1 (non-combustible) per ASTM E84.

• Acoustic Testing: Validated sound absorption coefficients (NRC 0.6–0.9) in controlled lab environments.

• Dimensional Stability: Humidity cycling tests confirm <1% expansion under 95% RH conditions.

Key Advantages of Bei Hua Mineral Fiber Boards

• Superior Fire Resistance: Withstands temperatures exceeding 1,000°C.

• High Noise Reduction: Ideal for auditoriums, offices, and healthcare facilities.

• Customization: Available in multiple sizes (e.g., 600x600mm, 1200x2400mm), thicknesses (12–25mm), and finishes.

Technical Specifications:

• Density: 220–350 kg/m³

• Thermal Conductivity: 0.035–0.045 W/m·K

• Moisture Resistance: ≤1% water absorption

• 
  

•