1. Product Overview
The stone wool core board is widely used as the core material in various sandwich panel systems, serving as fireproof, thermal insulation, heat insulation, and soundproofing material. It is especially suitable for applications in steel-structured buildings, clean rooms, cold storage, industrial plants, and other places with strict performance requirements. The stone wool core features excellent fire resistance (Class A non-combustible), low thermal conductivity, high dimensional stability, and good machinability. It meets national and European fire safety and environmental protection standards, making it one of the most reliable sandwich core material solutions available today.
2. Main Performance Parameters
|
Performance Item |
Parameter Range |
|
Apparent Density |
90–180 kg/m³ (customizable) |
|
Thermal Conductivity |
≤0.040 W/m·K (at 24℃) |
|
Fire Resistance Class |
A1 (GB 8624) |
|
Melting Point |
≥1000℃ |
|
Compressive Strength |
≥40 kPa (at 10% deformation) |
|
Tensile Strength |
≥10 kPa |
|
Dimensional Stability |
≤1% |
|
Moisture Absorption |
<1% |
|
Water Repellency |
Up to ≥98% hydrophobic (optional) |
|
Environmental Grade |
E0, formaldehyde-free, odorless |
|
Standard Size (Boards) |
1200×600mm / customizable |
|
Processable Forms |
Boards, strips, custom-shaped blocks |
3. Product Advantages
Ø Outstanding Fire Resistance
The stone wool core is a Class A non-combustible material that does not produce molten droplets or toxic smoke under high-temperature flames. It is ideal for public and industrial buildings with strict fire safety requirements.
Ø Excellent Thermal Insulation
With low thermal conductivity, it significantly reduces building energy consumption and improves overall energy efficiency, meeting the high energy-saving standards of green buildings.
Ø Good Sound Insulation
The natural porous structure of stone wool effectively absorbs sound waves and reduces noise transmission, providing a comfortable acoustic environment in noisy traffic or equipment operation areas.
Ø Superior Dimensional Stability
Resistant to deformation, warping, or shrinkage under alternating hot and cold conditions, it maintains structural stability over long-term use, making it an ideal choice for sandwich panel cores.
Ø Easy Machinability
Stone wool core boards can be cut, drilled, and shaped to meet various size and structural requirements, and they are compatible with automated processing equipment on production lines.
Ø Environmental Safety
Made from natural inorganic materials without formaldehyde or harmful volatile substances, complying with EU RoHS and REACH environmental certifications, ensuring green and safe usage.
4. Application Scope
- Various metal sandwich panels (roof panels, wall panels, cold storage panels)
- Structural thermal insulation wall systems
- Modular houses and prefabricated buildings
- Industrial plants and clean rooms
- Refrigerated transport vehicles and insulated container structures
- Thermal insulation and noise reduction layers for electrical equipment
- Interior partition systems and suspended ceilings
5. Product Forms and Processing Methods
(1) Board-Type Stone Wool Core
Thickness ranges from 30mm to 200mm, suitable for hot-press forming of various sandwich composite panels, compatible with automated lamination equipment.
(2) Strip-Type Stone Wool Core
Width customizable, generally used with continuous lamination of metal coils, suitable for roof corrugated panels and similar structures.
(3) Modular Blocks and Shaped Pieces
CNC pre-cut blocks provided based on customer structural dimensions and special applications, reducing on-site cutting and improving assembly efficiency.
6. Packaging and Transportation
Stone wool core is typically packaged with heat shrink film and covered with PE waterproof bags. According to customer requirements, carton boxes, pallet stacking, or vacuum packaging are available. During transportation, avoid rain exposure, heavy pressure, or strong impacts. Storage should be in a dry and ventilated place.
7. Quality Standards and Certifications
Our stone wool core products comply with the following major international and domestic standards:
GB/T 25975 "Building Stone Wool Sandwich Panels"
GB/T 11835 "Stone Wool and Slag Wool Products for Building Insulation"
EN 13501-1 Fire Classification Test
ISO 9001 Quality Management System Certification
CE Certification (for export to the EU)
RoHS and REACH Environmental Safety Certifications
8. Customization and Support Services
We provide customized solutions based on different sandwich panel structures, fire resistance limits, and mechanical strength requirements, including:
Customized material thickness, density, and water repellency levels
Custom lengths, widths, and perforation schemes
Batch automatic cutting and strip cutting services
Pre-coated adhesive layers and composite material integration solutions
Technical selection advice and structural optimization support
9. Customer Case Studies
Case 1: Logistics Park Roof Sandwich Panel Project (Jiangsu, China)
Background: A large intelligent logistics park requires roof panels with ≥2 hours fire resistance, excellent insulation, and high wind pressure resistance.
Solution: Used 180kg/m³ high-density stone wool strip core, continuous composite formed roof panels, 100mm thickness, 8m length per piece, with anti-pull reinforcement design.
Result: Fire resistance tested at 2 hours 30 minutes, excellent thermal conductivity, efficient on-site installation, high customer satisfaction.
Case 2: Cleanroom Wall Sandwich Panel Project (Poland)
Background: A European pharmaceutical cleanroom project demands ultra-clean, stable materials with high fire resistance.
Solution: Used hydrophobic 120kg/m³ stone wool board core, cutting precision ±1mm, installed with excellent flatness, meeting GMP cleanroom standards.
Feedback: Product quality met standards, fast supply, environmental compliance fully met EU regulations.
10. FAQ
Q1: Is the stone wool core toxic or harmful to humans?
A1: Our stone wool core is inorganic, free of formaldehyde, benzene, and other harmful volatiles, environmentally tested to meet E0 standards, completely safe and non-toxic.
Q2: What is the thermal conductivity of the stone wool core? Is it suitable for energy-efficient buildings?
A2: Thermal conductivity is generally between 0.035~0.040 W/m·K, with excellent insulation, highly suitable for energy-saving buildings and refrigerated facilities.
Q3: Can the core meet different thickness requirements for sandwich panels?
A3: Yes. We offer thickness options from 30mm to 200mm and can customize cutting based on structural requirements.
Q4: Does the core absorb moisture easily during use? How to prevent it?
A4: Standard stone wool has some moisture resistance; we also offer hydrophobic products with ≥98% water repellency, suitable for high-humidity or cold storage environments.
Q5: Can batch processing be done for strips or shaped parts?
A5: Yes. We have automatic cutting and CNC pre-cutting equipment, providing high-precision, large-scale processing to save customer production time.
