Plain MDF is an engineered wood panel manufactured from refined wood fibers bonded with synthetic resin under high temperature and pressure. Characterized by its homogeneous density profile and smooth surfaces, it serves as a premium substrate for precision machining and high-quality finishes across furniture, construction, and interior applications.

Key Specifications

1. Core Composition

   • 82-85% wood fibers (hardwood/softwood blend)

   • 12-15% urea-formaldehyde (UF) or no-added-formaldehyde (NAF) resin

   • 3-5% paraffin wax (moisture resistance)

2. Physical Properties

   • Density: 680-800 kg/m³ (EN 323)

   • Modulus of Rupture: 23-35 N/mm² (EN 310)

   • Surface Smoothness: ≤5µm Ra (ISO 4287)

3. Standard Dimensions

   Parameter	Range	Tolerance
   Thickness	2.5mm-40mm	±0.2mm
   Formats	1220×2440mm up to 1830×3660mm	±1.5mm lengthwise
   Edge Quality	CNC-ready, micro-bevel optional

Manufacturing Process

1. Fiber Preparation

   • Thermomechanical pulping (180°C steam pretreatment)

   • Refining to 0.1-0.3mm fiber length

2. Mat Formation

   • Air-laid fiber distribution (±2% density variation)

   • Continuous press (200-220°C, 25-35 bar)

3. Post-Production

   • Humidity conditioning to 6±1% MC

   • Calibration sanding (P120-P180 grit)

Performance Characteristics

• Advantages

  • Superior machinability (holds intricate profiles)

  • Paint-grade surfaces (absorption 80-100g/m²)

  • Consistent mechanical properties (CV<5%)

• Limitations

  • Not recommended for structural applications

  • Requires edge sealing in humid environments

  • Lower impact resistance compared to plywood

Application Matrix

Quality Standards

• Formaldehyde Emissions

  • E0 ≤0.05ppm (JIS A 1460)

  • CARB Phase 2 & NAF compliance

• Mechanical Testing

  • Internal Bond ≥0.65 N/mm² (EN 319)

  • Thickness Swelling (24h) <8%

Comparative Analysis

Installation Guidelines

1. Machining Parameters

   • Router bits: Carbide-tipped, 18,000-24,000 RPM

   • Feed rate: 4-6m/min for clean edges

2. Surface Preparation

   • Seal with 2K primer for high-gloss finishes

   • Allow 16h curing before sanding (23°C/50%RH)

3. Environmental Compliance

   • Storage at 35-65% relative humidity

   • Thermal expansion coefficient: 0.07mm/m/°C