minghungmachinery@gmail.com ▏  +8618769900191 / +8615589105786

All
Product Name
Product Keyword
Product Model
Product Summary
Product Description
Multi Field Search

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

Veneer Dryer Machine

Random Products

Woodworking Machinery Wood Veneer Peeling Machine for Rotary Peeling Plywood Veneer

Spindleless Veneer Peeling Machine with Servo Motor

Woodworking Machinery Hot Press Machine for Plywood Making

Plywood Hot Press for Woodworking

Plywood Production Making Machine Price

Wood Veneer Finger Jointer for Plywood Composing

CNC Plywood Machine Woodworking Machinery

Wood Veneer Peeling Machine for Processing Timber Log

Woodworking Plywood 500t Core Cold Press

Automatic Circular Saw for Plywood Edge Cutting Saw

Melamine Veneer Press Machine Melamine Hot Press Machine

Machine for Trimming Cutting Plywood Edges

Wood Veneer Guillotine for Log Peeling Machine

Veneer Production Line Veneer Peeling Machine for Plywood Veneer Core

Particle Board Making Machine Trimming Cutting Saw Machine for OSB/Wood Panel Saw Machine

Wood Based Panel Machinery Automatic Putty Line

Annual Production of 50,000m³ 5mm Ultra-thin MDF Board Machinery And Equipment

Small Diameter Spindleless High-Efficiency Peeler

Customizable-sized Plywood Production Line

Furniture Manufacturing Plywood Production Line Smooth Surface

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

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).

Quantity:
Availability:





Inquire Add to Basket

Model:
MH-CHP
Brand:
MINGHUNG

Product Description

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

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)

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 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 clients MINGHUNG 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

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

*Verify Code

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"!

A New Chapter in Smart Manufacturing: Our 18-Month Journey To A Brand-New Facility

07-29 2026

This new facility marks a fresh start for our company. Guided by our enduring commitment to "precision engineering and quality first," we are now better equipped than ever to provide efficient, durable, and innovative machinery solutions for the worldwide wood-based panel industry.

Second Batch of Equipment From Shandong MINGHUNG Successfully Shipped

12-26 2025

As Christmas approaches, Shandong MINGHUNG wood based panel machinery Co., Ltd. has welcomed another peak in shipments.

9 Containers Set Sail MINGHUNG’s Complete Plywood Production Line Successfully Departs

12-18 2025

In early December 2025, the culmination of close collaboration between the MINGHUNG foreign trade team and our partners — 9 containers fully loaded with the core equipment for a plywood production line .

SHANDONG MINGHUNG WOOD BASED PANEL MACHINERY FACTORY

08-05 2020

Shandong Minghung Wood Machinery Factory Shandong minghung wood machine factory produces plywood machinery in linyi city city, china, dedicated to providing high-quality and suitable machines veneer machine,plywood machine,veneer splicing machine.veneer dryer machine,veneer peeling machine,plywood v

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

Home

CONTACT US

+86-18769900191 / +86-15589105786
+86-18769900191 / +86-15589105786
minghungmachinery@gmail.com
Fangcheng Town,Lanshan District,Linyi City,Shandong Province,China

PRODUCT CATEGORY

Random Products

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

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

Shanghai International Woodworking Machinery Fair Day 1 Report: Overwhelming Popularity!

A New Chapter in Smart Manufacturing: Our 18-Month Journey To A Brand-New Facility

Second Batch of Equipment From Shandong MINGHUNG Successfully Shipped

9 Containers Set Sail MINGHUNG’s Complete Plywood Production Line Successfully Departs

SHANDONG MINGHUNG WOOD BASED PANEL MACHINERY FACTORY

PRODUCT GROUPS

CONTACT US