MH-CHP
MINGHUNG
Structural Characteristics
Classification level | Material composition | Function |
Surface layer | Fine fibers + High-density resin | Seal the pores and prevent water vapor from penetrating |
Core layer | Modified urea-formaldehyde resin + paraffin emulsion | Enhance wet-state strength (≥ 0.65 N/mm²) |
Balance layer | Symmetrical paving structure | Prevent warping deformation (with moisture content ≤ 12%) |
Moisture-proof mechanism
Component | Functional Principle | Technical Index |
Modified Resin | UF resin + 20% melamine (molar ratio 1:0.3) forms hydrolysis-resistant crosslinked networks | Wet bond strength ≥1.8 MPa |
Wax System | Molten wax + emulsifier (HLB 12-14) → 0.5-2μm emulsion coating fibers | 1.5% dosage, penetration ≥80μm |
Fiber Treatment | Wood fibers pretreated with 0.5% aluminum sulfate ↓ surface zeta potential ↑ resin adsorption | Fiber contact angle ≥110° |
Physical Properties (15mm Board)
Property | Standard MDF | Moisture-Resistant MDF |
Density | 720±30 kg/m³ | 780±20 kg/m³ |
24h Thickness Swell | 15-18% | ≤6% |
Wet MOR | 18 MPa | ≥35 MPa |
Formaldehyde Emission | ≤0.1 ppm | ≤0.03 ppm |
1. Raw Material Section
Equipment:
Drum chipper (Φ1600mm cutter, 315kW, output chips 30×40×5mm)
3-stage counterflow washing (sand content <100 ppm)
Daily consumption:
Oven-dry wood: 310 tons (620 tons at 50% MC)
Resin: 11 tons (65% solids UF resin)
2. Fiber Preparation
Refining System:
Parameter | Value |
Disc diameter | 54" (1372 mm) |
Disc gap | 0.08-0.12 mm |
Steam pressure | 0.95 MPa |
Fiber yield | ≥96% |
Additive Injection:
Wax emulsion: Twin-screw metering pump (±0.1% accuracy)
Aluminum sulfate: High-pressure spray (droplet size ≤50μm)
3. Forming & Hot Pressing (15mm Critical Process)
Forming Method:
Air forming (surface: 40% fine fibers; core: 60% coarse fibers)
Density variation: ≤±2.5%
Continuous Press Parameters:
Press Zone | Temp. (℃) | Pressure (MPa) | Time (s) | Function |
Pre-press | 180 | 2.5 | 40 | Deaeration & pre-cure |
Core Cure | 210 | 4 | 180 | Hydrolysis-resistant layer |
Surface cure | 195 | 3.2 | 90 | Densification |
Pressure release | 170 | 0.8 | 30 | Stress relief |
→ Total press time: 340 s (5.7 min)
4. Finishing System
Cooling:
12-roll forced cooling (160°C → 45°C in 25 min)
Sanding:
4-head calibrating sander (grit sequence: P60→P120→P180→P240)
Removal: 0.4 mm (0.2 mm/side)
Cutting:
High-speed crosscut saw (tolerance: 1220<sup>+0.5</sup>×2440<sup>+1.0</sup> mm)
Critical Equipment:
Dryer pipeline: 120 m length, 18 m/s air velocity (fiber residence 6.7 s)
Fiber dryer capacity: 8.2 t/h water evaporation
Steam boiler: 6 t/h @ 1.3 MPa
Aspect | Benefit |
Structural | 25% ↑ MOE vs 12mm board (≥3500 MPa); 17% ↓ weight vs 18mm board |
Durability | Passes BS EN 321 cyclic test (3×72h soak + 24h dry, swelling ≤10%) |
Machinability | CNC milling depth ≤12mm; curved pressing (min. radius R=150mm) |
Sector | Application | Performance Requirement |
Bathroom Furniture | Vanity cabinets | Long-term RH≥85% exposure (GB/T 17657-2013 Sec 4.24) |
Medical Facilities | Sterile instrument carts | Antibacterial surface (≥99.9% inhibition, ISO 22196) |
Marine Interiors | Cabin partitions | IMO FTPC Part 8 fire & moisture certification |
Cold Chain | -40°C freezer doors | 50 thermal cycles (-40°C~+60°C) without delamination (ASTM D1037) |
Founded in 1983, Shandong MINGHUNG OSB&MDF Machinery Equipment Manufacturing Co.,Ltd., specializes in continuous press solutions for over 40 years.
MINGHUNG is a leading company in the industry of OSB&MDF making machine. With a strongfocus on producing high-quality machinery, we specialize in manufacturing thecomplete production line of Medium density fiberboard (MDF), High densityfiberboard (HDF),Particle board (PB), Oriented strand board (OSB) and Veneerable super strong particle board (LSB).
Inquire Now & Enjoy Fast Response (24/7 Support)!
Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
Structural Characteristics
Classification level | Material composition | Function |
Surface layer | Fine fibers + High-density resin | Seal the pores and prevent water vapor from penetrating |
Core layer | Modified urea-formaldehyde resin + paraffin emulsion | Enhance wet-state strength (≥ 0.65 N/mm²) |
Balance layer | Symmetrical paving structure | Prevent warping deformation (with moisture content ≤ 12%) |
Moisture-proof mechanism
Component | Functional Principle | Technical Index |
Modified Resin | UF resin + 20% melamine (molar ratio 1:0.3) forms hydrolysis-resistant crosslinked networks | Wet bond strength ≥1.8 MPa |
Wax System | Molten wax + emulsifier (HLB 12-14) → 0.5-2μm emulsion coating fibers | 1.5% dosage, penetration ≥80μm |
Fiber Treatment | Wood fibers pretreated with 0.5% aluminum sulfate ↓ surface zeta potential ↑ resin adsorption | Fiber contact angle ≥110° |
Physical Properties (15mm Board)
Property | Standard MDF | Moisture-Resistant MDF |
Density | 720±30 kg/m³ | 780±20 kg/m³ |
24h Thickness Swell | 15-18% | ≤6% |
Wet MOR | 18 MPa | ≥35 MPa |
Formaldehyde Emission | ≤0.1 ppm | ≤0.03 ppm |
1. Raw Material Section
Equipment:
Drum chipper (Φ1600mm cutter, 315kW, output chips 30×40×5mm)
3-stage counterflow washing (sand content <100 ppm)
Daily consumption:
Oven-dry wood: 310 tons (620 tons at 50% MC)
Resin: 11 tons (65% solids UF resin)
2. Fiber Preparation
Refining System:
Parameter | Value |
Disc diameter | 54" (1372 mm) |
Disc gap | 0.08-0.12 mm |
Steam pressure | 0.95 MPa |
Fiber yield | ≥96% |
Additive Injection:
Wax emulsion: Twin-screw metering pump (±0.1% accuracy)
Aluminum sulfate: High-pressure spray (droplet size ≤50μm)
3. Forming & Hot Pressing (15mm Critical Process)
Forming Method:
Air forming (surface: 40% fine fibers; core: 60% coarse fibers)
Density variation: ≤±2.5%
Continuous Press Parameters:
Press Zone | Temp. (℃) | Pressure (MPa) | Time (s) | Function |
Pre-press | 180 | 2.5 | 40 | Deaeration & pre-cure |
Core Cure | 210 | 4 | 180 | Hydrolysis-resistant layer |
Surface cure | 195 | 3.2 | 90 | Densification |
Pressure release | 170 | 0.8 | 30 | Stress relief |
→ Total press time: 340 s (5.7 min)
4. Finishing System
Cooling:
12-roll forced cooling (160°C → 45°C in 25 min)
Sanding:
4-head calibrating sander (grit sequence: P60→P120→P180→P240)
Removal: 0.4 mm (0.2 mm/side)
Cutting:
High-speed crosscut saw (tolerance: 1220<sup>+0.5</sup>×2440<sup>+1.0</sup> mm)
Critical Equipment:
Dryer pipeline: 120 m length, 18 m/s air velocity (fiber residence 6.7 s)
Fiber dryer capacity: 8.2 t/h water evaporation
Steam boiler: 6 t/h @ 1.3 MPa
Aspect | Benefit |
Structural | 25% ↑ MOE vs 12mm board (≥3500 MPa); 17% ↓ weight vs 18mm board |
Durability | Passes BS EN 321 cyclic test (3×72h soak + 24h dry, swelling ≤10%) |
Machinability | CNC milling depth ≤12mm; curved pressing (min. radius R=150mm) |
Sector | Application | Performance Requirement |
Bathroom Furniture | Vanity cabinets | Long-term RH≥85% exposure (GB/T 17657-2013 Sec 4.24) |
Medical Facilities | Sterile instrument carts | Antibacterial surface (≥99.9% inhibition, ISO 22196) |
Marine Interiors | Cabin partitions | IMO FTPC Part 8 fire & moisture certification |
Cold Chain | -40°C freezer doors | 50 thermal cycles (-40°C~+60°C) without delamination (ASTM D1037) |
Founded in 1983, Shandong MINGHUNG OSB&MDF Machinery Equipment Manufacturing Co.,Ltd., specializes in continuous press solutions for over 40 years.
MINGHUNG is a leading company in the industry of OSB&MDF making machine. With a strongfocus on producing high-quality machinery, we specialize in manufacturing thecomplete production line of Medium density fiberboard (MDF), High densityfiberboard (HDF),Particle board (PB), Oriented strand board (OSB) and Veneerable super strong particle board (LSB).
Inquire Now & Enjoy Fast Response (24/7 Support)!
Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
