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 Product Process

This production line systematically reduces formaldehyde emissions to minimal levels through four core enhancements over the standard MDF process: raw material selection, adhesive innovation, precise process control, and enhanced post-processing.

1.  Raw Material Pretreatment & Fiber Preparation:

   Wood raw materials are chipped, screened, and washed before entering the refining system. A key focus is the stricter removal of impurities like bark and knots, which contain tannins that can react with adhesives to generate aldehydes. The moisture content of refined fibers is controlled with higher precision to create optimal conditions for uniform resin application.

2.  Core Step: Eco-Friendly Adhesive Application & Blending:

   This is the most critical step for achieving ultra-low formaldehyde. The line is equipped with an advanced metering and blending system compatible with various eco-friendly adhesives:

      No-Added-Formaldehyde (NAF) Adhesives: Such as MDI (isocyanate), soy protein glue, or lignin-based adhesives.

      Ultra-Low Formaldehyde Urea-Formaldehyde (UF) Resins (E0 grade or lower): Using high molar ratio, deeply modified recipes, potentially with formaldehyde scavengers (e.g., urea, melamine, plant tannins).

   Application occurs in enclosed pipelines where high-pressure spraying and high-speed mixing ensure each fiber is evenly coated.

3.  Mat Forming & Pre-Pressing:

   Resinated fibers are formed into a uniform mat via a high-precision forming machine. Pre-pressing removes air and provides initial consolidation, preparing the mat for continuous hot pressing.

4.  Precise Hot Pressing & Curing:

   Inside the continuous flat press (e.g., ContiRoll), precisely controlled "temperature-pressure-time" profiles ensure efficient and complete curing of the eco-adhesives. For reactive adhesives like MDI, platen temperature must be controlled to prevent sticking; for modified UF resins, the curing rate is optimized to minimize free formaldehyde generation.

5.  Post-Processing & Conditioning (Key Formaldehyde Reduction Step):

   Pressed boards undergo specialized post-treatment, a guarantee step for further reducing formaldehyde.

      Post-Processing Conditioning Kiln: Boards enter a kiln with constant temperature and humidity for several days of slow conditioning. This process encourages the release and dissipation of residual free formaldehyde.

      Surface Treatment: Some high-end lines integrate equipment for edge sealing or micro-coating, creating a physical barrier on the board surface.

6.  Cooling, Cutting & Inspection:

   Conditioned boards are cooled, calibrated/sanded (if required), and cut to size. Finally, 100% quality monitoring or high-frequency sampling via online formaldehyde detectors (e.g., spectroscopy analyzers) ensures every batch meets the ultra-low emission standard.

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 Complete Production Equipment

A complete ultra-low formaldehyde MDF line is an integrated system of traditional and specialized environmental equipment,mainly include:

1.  Raw Material Section: Chipper, flaker, screening station, washing plant, storage and conveyor systems.

chipper

flaker

vibrating screen

2.  Fiber Preparation Section: Defibrator (refiner), fiber drying pipeline, drying cyclone.

refining system

fiber drying machine

3.  Resin Application & Forming Section (Core Environmental Unit):

      Eco-Adhesive Preparation & Storage System (with temperature control).

      High-Precision Metering/Blending Machine (for high-viscosity or NAF adhesives).

      Blended Fiber Drying/Mixing System.

      High-Uniformity Forming Machine (mechanical or air-felter type).

glue blender

forming machine

4.  Pressing & Post-Processing Section (Core Environmental Unit):

      Continuous Flat Press (e.g., ContiRoll) or high-performance multi-opening press with precise temperature control.

      Board Cooling & Flipping Device.

      Large-Capacity Post-Processing Conditioning Kiln (with air circulation and purification).

continuous hot press

dryer rack

5.  Sanding & Cutting Section: Calibrating sander, cross-cut and rip saws, stacker.

sander

cross-cut saw

6.  Quality Control & Environmental Monitoring System (Core Unit):

      Online Formaldehyde Emission Detection System.

      Central Process Control System (DCS/PLC), integrating monitoring and optimization of all key process parameters.

7.  Auxiliary Systems: Energy plant (boiler), dust collection system, exhaust gas treatment system (especially for potential VOCs).

energy plant

boiler

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 Advantages of the Production Line

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 Applications of  MDF

Thanks to its outstanding environmental and reliable physical properties, ultra-low formaldehyde emission MDF is widely used in areas with the highest health and safety demands:

1.  High-End Furniture Manufacturing: Children's furniture, cribs, complete kitchen cabinets, bedroom wardrobes, dining tables/chairs—products in direct contact with users.

2.  Interior Finishing & Building Materials: Wall panels, ceilings, feature walls, interior doors/frames, floor underlayment for homes and commercial spaces.

3.  Educational & Medical Facilities: School desks/chairs, library shelves, hospital ward furniture, nurse stations, laboratory cabinets.

4.  Transportation Interiors: Interior wall panels and cabinets for high-speed train carriages, RVs, yachts, and premium business vehicles, meeting strict air quality requirements in enclosed spaces.

5.  Crafts & Electronics: High-end photo frames, musical instrument parts, speaker cabinets, protective inner packaging for electronics.

6.  Export-Oriented Products: Furniture and building components specifically manufactured for export to regions with stringent environmental regulations.

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 Company Profile

Shandong MingHung OSB&MDF Machinery Equipment is a China professional factory who specilize in manufacturering and offering Wood based panel machine, including OSB making machine, MDF making machine, and Chipboard /PB making machine.

Our factory with the advanced processing lathes, Mature production technology, and Professional engineers and technicians, and independent ability of reasearch and development, and quickly service, ensure that we have the ability to offer you the suitable and good woodworking machinery as different conditions and requires.

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 Workshop of plant

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 Certifications

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 Packaging and shipping