minghungmachinery@gmail.com   ▏           +8618769900191 / +8615589105786
Continuous Hot Press for Fireproof Board Substrates & Class A Flame Retardant Certification
You are here: Home » OSB PB MDF Machine Serise » OSB PB MDF Machine Serise » Continuous Hot Press for Fireproof Board Substrates & Class A Flame Retardant Certification

PRODUCT CATEGORY

Random Products

film faced plywood hot press machine
film faced plywood hot press machine
Veneer Slicing Machine with Veneer Cutter
Veneer Slicing Machine with Veneer Cutter
Plywood Veneer Glue Spreader
Plywood Veneer Glue Spreader
Penumatic Cylinder
Penumatic Cylinder
Woodworking Machine Plywood Cold Press Machine
Woodworking Machine Plywood Cold Press Machine
Plywood Wood Log Peeling Machine for Furniture Chair
Plywood Wood Log Peeling Machine for Furniture Chair
Plywood Machine Veneer Gluing Machine for Woodworking Machinery
Plywood Machine Veneer Gluing Machine for Woodworking Machinery
10 Floors Filmed Faced Plywood Hot Press for Making Anti Slip Plywood
10 Floors Filmed Faced Plywood Hot Press for Making Anti Slip Plywood
Blade Sharpening Machine for Grinding Peeling Knife
Blade Sharpening Machine for Grinding Peeling Knife
Sharpening Grinding Machines for Make Knife Edge Sharp
Sharpening Grinding Machines for Make Knife Edge Sharp
Machine for Lay out Plywood Veneer
Machine for Lay out Plywood Veneer
Wood Working Machine Knife Blade Sharpening Grinding Machine
Wood Working Machine Knife Blade Sharpening Grinding Machine
Hydraulic Glue Mixer for Plywood Production
Hydraulic Glue Mixer for Plywood Production
Auto Cutting Trimming Machine for Plywood Production
Auto Cutting Trimming Machine for Plywood Production
Veneer Peeling Lathe
Veneer Peeling Lathe
High Quality 12/18/25mm Plain Particleboard Production Line Manufacturing
High Quality 12/18/25mm Plain Particleboard Production Line Manufacturing
China Line Production Manufaturer: Particles Fibers Shavings Mat Paving Forming Machine Flakeboard Fiberboard Particleboard Production Line
China Line Production Manufaturer: Particles Fibers Shavings Mat Paving Forming Machine Flakeboard Fiberboard Particleboard Production Line
Core Veneer Roller Mesh Drying Machines for Core Veneer Making Production Line from China Minghung Woodworking Machinery Manufacturer
Core Veneer Roller Mesh Drying Machines for Core Veneer Making Production Line from China Minghung Woodworking Machinery Manufacturer
MDF / HDF / OSB Particle Board Chipboard Production Line / Medium Density Fiberboard Making Machine Line-MINGHUNG
MDF / HDF / OSB Particle Board Chipboard Production Line / Medium Density Fiberboard Making Machine Line-MINGHUNG
Veneer Dryer for Plywood Production
Veneer Dryer for Plywood Production

loading

Continuous Hot Press for Fireproof Board Substrates & Class A Flame Retardant Certification

Fireproof Board Substrate: Inorganic materials (e.g., calcium silicate, magnesium oxide) or flame-retardant modified wood fiber cores, formed under high temperature/pressure for construction fire barriers.
Continuous Hot Press: Automated equipment using steel belts for continuous conveyance, with zoned pressure and heating for curing substrates.
Class A Certification: Highest fire rating under China’s GB 8624 standard, requiring non-combustibility (strict thresholds for heat release, smoke density, toxic gas).
Availability:
Quantity:
Inquire Add to Basket

sharethis sharing button

  • MH-CHP

  • MINGHUNG


Continuous Hot Press for Fireproof Board Substrates & Class A Flame Retardant Certification

Ⅰ. Fireproof Board Substrates  

1. Substrate Types  

 Inorganic Substrates (Dominant):  

 Calcium Silicate Board: Quartz powder (45%) + Lime (33%) + Cement (15%) + Pulp fiber (7%)  

 Magnesium Oxide Board: MgO + MgCl₂ + Plant fibers (requires surface sealing)  

 Glass-MgO Board: MgO + Fiberglass mesh (high strength)  

 Organic substrates (flame-retardant modification)

 Flame-retardant particleboard: Wood chips + phosphorus-nitrogen type flame retardant (addition amount 8-15%)

 Flame-retardant MDF: Wood fibers impregnated with zinc borate/aluminum hydroxide (impregnation concentration ≥ 12%)

2. Standard Dimensions  

Parameter

Standard Range

Customization

Thickness

6mm, 9mm, 12mm

4mm(ultra-thin)-25mm

Width

1220mm, 1250mm

800-1500m

Length

2440mm, 2750mm

1200-3660mm

II. Production Process of Flame-Retardant Particleboard Base Material  


PB生产流程图


1. Raw Material Preparation  

  Wood fragmentation:Fast-growing forest wood (poplar/cedar) is debarked, sliced, and screened to produce 20-40mm long and 0.2-0.5mm thick particle boards.

  Drying:The drum dryer reduces the moisture content of the particle boards from 40-60% to 2-4% (temperature 120-140℃, to avoid carbonization).


Wood Chipper Machine For Particle Board Production Line

wood chipper machine

Three-channel chip drying system

particleboard drying system


2. Application of Flame Retardants

  Types of Flame Retardants:

  Liquid type: Ammonium phosphate solution (concentration 15-20%)

  Powder type: Polyphosphate ammonium (APP) + Aluminum hydroxide (ATH) compound (ratio 1:1)

Application method:

  Liquid: Ammonium phosphate solution (15-20% conc.) sprayed at 10-12% dosage  

  Powder: APP+ATH blend (1:1 ratio) mixed with UF resin (25-30% of resin solids)  

MINGHUNG Particleboard sizing system for PB making



3. Blending & Forming  

  Resin System:Modified UF resin (50-55% solids) + retardant, total adhesive 8-10% of dry flakes

  Layered Forming:  

  Surface: Fine flakes (<0.3mm, 40% for smoothness)  

  Core: Coarse flakes (>1mm, 60% for stability)  

PB paving machine



4. Pressing  

  Pre-pressing:cold-pressed at 1-1.5MPa for 30s to 50% target thickness

  Continuous Hot Pressing:  

Parameter

Surface Layer

Core Layer

Temperature

180-185℃

170-175℃

Pressure

3.5-4.0MPa

2.8-3.2MPa

Time

20-25 sec/mm

(e.g., 240-300s for 12mm)


MINGHUNG MDF Pre Press Machinery

pre press machine

PB MDF OSB Continuous Belt Hot Press Prodcution Line

continuous hot press


5. Post-processing  

Cooling & Conditioning:  Roller cooling to <50℃, humidity adjusted to 8-10%  

Curing:  Stacked in climate chamber (25±2℃) for 48-72 hours  

Sanding:  Double-side calibrated to ±0.15mm tolerance  



PB MDF OSB cutting machine

PB sawing machine

Minghung Particle Board Chipboard OSB MDF HDF LVL Sanding Sander Grinding Polishing Machinery

sanding machine for chipboard


Ⅲ.Conversion to Fireproof Board  

1. Surface Treatment:  

   Coating with melamine resin + aluminum hydroxide filler (25-35g/㎡)  

2. Decorative Lamination:  

Layer

Material

Thickness

Wear Layer

Sb₂O₃-containing overlay

0.08-0.15mm

Decorative Layer

Flame-retardant printed paper

0.12-0.18mm

Core

Treated substrate

6-25mm

Balance Layer

Phenolic-impregnated kraft

0.3-0.5mm

3. Hot Pressing:  

    Pressure: 8-12MPa  

    Temperature: 140-160℃  

     Time: 25-40 seconds/mm thickness  

4. Post-Processing:  

     UV-cured scratch-resistant coating (3-5μm)  

     Surface texturing for stone/wood grain  


Ⅳ.Key Performance Standards  


Fire Rating (GB A-class): Heat release ≤2.0MJ/kg, smoke density ≤15  

Physical Properties: Thermal conductivity 0.15-0.25W/(m·K), flexural strength ≥15MPa  


Ⅴ. Critical Role of Hot Press in Class A Certification  


5.1 Precision Temperature Control:  

 Flame retardants (e.g., aluminum hydroxide, phosphorus-nitrogen compounds) activate within specific ranges (180-220°C). Zoned heating ensures core-layer reaction without under/overburning.  

5.2 Uniform Pressure Penetration:  

 High-pressure zones (>5MPa) force molten retardants into substrate pores, creating dense fire barriers to block oxygen diffusion.  

5.3 Structural Integrity Assurance:  

 Constant-pressure curing eliminates internal stress, preventing post-cooling cracks (which compromise fire resistance) and ensuring structural stability during combustion tests.  


Ⅵ. Technical Requirements for Class A Certification  

6.1 Retardant Compatibility:

 Press components (e.g., chrome-plated belts) must resist acid/alkali corrosion from retardants.  

6.2 Low-Smoke Emission Design:  

 Negative-pressure exhaust systems remove volatile decomposition gases during pressing, reducing smoke density in later combustion.  

6.3 Process Traceability:  

 Temperature/pressure curves must be recorded to verify activation conditions for certification audits.  


Ⅶ. Certification Value  


Regulatory Compliance: Mandatory for interior applications (especially high-rises/public spaces).  

Performance Edge: Certified substrates achieve 1-3 hours fire resistance (EN 13501-2).  




Customer group photo  

MINGHUNG clientsMINGHUNG plywood machine





For more information, welcome contact us, we will reply you quickly and offer working videos with you.


+86 18769900191, +86 15805496117, +86 18954906501







Previous: 
Next: 
Continuous Hot Press Fireproof Board Substrates Class A Flame Retardant Certification high-speed continuous flat press Factory hydraulic continuous flat press custom continuous flat press Factory Wood Based Panel Continuous Press
Product Inquiry
Attach Files
Verify Code
4_副本.jpg
Minghung Wood Base Panel Machinery Is Heading To WoodTech Istanbul 2026 — Booth 905E
10-22 2026

On October 20, 2026, the foreign trade team of Shandong Minghung Wood Base Panel Machinery Co., Ltd. set off from China and flew to Istanbul, Turkey, to take part in the 39th International Woodworking Machinery, Cutting Tools and Hand Tools Exhibition (WoodTech Istanbul 2026). The show runs from October 22 to 25 at the Tüyap Fair and Congress Center in Istanbul, and Minghung's booth number is 905E.

Read More
Fair hall01_614_614.png
Shanghai International Woodworking Machinery Fair Day 1 Report: Overwhelming Popularity!
09-08 2026

The first day of the 2026 Shanghai International Woodworking Machinery Fair – if this morning's keyword was "surprise," then this afternoon's keywords are definitely "explosive" and "confidence"!

Read More
Fair hall11_614_614.png
The 2026 Shanghai International Woodworking Machinery Exhibition Came To A Perfect Close — We Reaped A Bountiful Harvest!
09-11 2026

This trip to Shanghai was not only a display of products, but also a dissemination of our brand and a connection of emotions. We will continue to stay true to our original aspiration and repay every customer's trust and support with even better products and services. The future is full of promise, and we are always on the way!

Read More
plywood machine deliver (8)_649_649.png
The Moon Grows Full, But No One Rests — The Dedication Behind 25 Containers
09-29 2026

The Mid-Autumn Festival is approaching, and the moon is growing round. While many people are beginning to prepare for family reunions, the company’s factory tells a different story: forklifts weaving through the yard, crane arms rising and falling, containers lined up in rows, and loading work proceeding in a tense yet orderly manner.

Read More
Particleboard paving machine.jpg
How to produce Particle board? What is the production step
09-09 2023

How to produce Particle board? What is the production step of Making Particle board?Introduction:Particle board, also known as chipboard, is a versatile and cost-effective material widely used in the construction and furniture industries. It is made by compressing wood particles and adhesive togethe

Read More
Shandong MINGHUNG Wood Machinery Co.,Ltd is one famous manufacturer of plywood machine in China, located in Linyi city. 
Home

PRODUCT GROUPS

CONTACT US

 +86-18769900191 /  +86-15589105786 
 +86-18769900191 / +86-15589105786
 minghungmachinery@gmail.com
  Fangcheng Town,Lanshan District,Linyi City,Shandong Province,China
Copyright © 2010 SHANDONG MINGHUNG WOOD MACHINERY CO.,LTD