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EPS sandwich panel
EPS sandwich panels are composed of expanded polystyrene foam plastic core material and two layers of exterior finishes (usually made of galvanized steel plates, aluminum plates or other metal plates). These panels combine a lightweight structure with excellent heat insulation performance and mechanical properties.
Main ingredients
Core material: Expanded polystyrene foam plastic, providing thermal insulation performance.
Exterior finish: Metal plate, protecting the core material and ensuring structural integrity.
Explanation of Matters |
The name of the board is foam sandwich panel
Effective width of the panel for the roof: 950/960mm Wall surface: 950/1150mm The panel length is 20 feet and the container is 5.9 meters A 40-foot container is 11.9 meters long The panel thickness is 50/75/100/150/200mm Steel plate specification The materials are color-coated steel plates, aluminized zinc smooth plates and stainless steel plates Thickness: 0.40 to 0.70mm Coating: PE, HDP, SMP, PVDF Color customization Steel types: PPGL, PPGI steel plates/aluminum plates/stainless steel plates Hide the screw type in a combined manner Foam core material (EPS Fire resistance grade: B1 /B2 Density: 12-14kg/m³ The resistance of the heat transfer process is 0.035-0.05w/m·k |
Waterproof and durable
The board structure is compact, the joints are tight, and it has excellent waterproof performance, adapting to various climate conditions.
Sound insulation and noise reduction
The porous structure of EPS core material effectively absorbs sound waves, significantly reduces noise interference, and enhances the comfort of the space.
Energy conservation and environmental protection
It has excellent thermal insulation performance, reduces building energy consumption, and contributes to the goal of green and energy-saving buildings.
Economically efficient
High cost performance, easy installation, suitable for large-scale applications in industrial plants, warehouses, cold storage and temporary buildings, etc.
Main technical characteristics and material properties
The thermal conductivity λ of EPS is 0.032-0.038 W/(m·K).
Under the standard thickness of 50-150 mm, the thermal resistance R has a linear relationship with the thickness: 100 mm core thickness ≈ R-3.0-3.1 m²·K/W, easily meeting the energy-saving requirements for the maximum U value of the enclosure structure as stipulated in ASHRAE 90.1 and IECC.
2. Mechanical strength
The density of EPS ranges from 15 to 30 kg/m³, which affects the compressive strength (typically 80 to 150 kPa).
The double-sided finish can significantly enhance the bending resistance and impact resistance.
With appropriate keels, it can be used for both load-bearing and non-load-bearing walls.
3. Fire resistance performance
EPS is flammable, but its fire resistance can be enhanced by adding flame retardant additives.
It is of vital importance to comply with fire safety standards such as ASTM E84 and EN 13501-1 or local regulations.
The use of fireproof finishes can enhance the fire resistance rating.
The volume water absorption rate is less than 1%, and the size remains stable in a long-term humid environment.
The surface finish and perimeter sealing form the first moisture-proof barrier.
For high-humidity or cold storage projects, it is recommended to add a 0.2mm PE vapor barrier on the warm side to ensure that ψ≤4 ng/(Pa·s·m²).
Engineering Principles
1. Material composition
Core material: Expanded polystyrene (EPS) with a density of 15-25 kg/m³.
Finish: Fiber cement board, calcium silicate board or galvanized steel plate.
Thermal conductivity: λ = 0.032-0.038 W/m·K.
Sheet thickness: Usually 50-200 mm.
2. Structural characteristics
Compressive strength: 70-150 kPa, depending on the density of EPS.
Weight: The standard sheet weight is 20-25 kg/m².
Thermal resistance (R value) : R3.5 - R5.0, depending on the thickness.
Sound insulation effect: The composite finish can reach up to 35-40 dB at most.
3. Functional advantages
Light in weight, it reduces the structural load.
Compared with brick and stone structures, the installation speed is faster.
High thermal efficiency and reduced energy consumption.
Because EPS is recyclable, it is environmentally friendly.
Compliance with industry standards and regulations
ASTM C578: Specifies the thermal insulation performance of rigid polystyrene foam.
EN 13163: European Standard for EPS Insulation products.
ASTM E84: Standard Test method for Burning Characteristics of Building materials surfaces.
ISO 9001: Manufacturing Quality Management System.
Building codes: Comply with local and international building codes to ensure compliance and safety.
Installation and operation precautions
The substructure: The roof supports must be sufficient to bear the self-weight of the panels and loads such as wind and snow, while reserving space for deformation due to thermal expansion and contraction.
Panel connection: Select fasteners and sealants compatible with the foam core material to prevent solvent corrosion of the core material, forming a continuous barrier that takes into account wind and rain protection as well as thermal bridge isolation.
Handling: Handle with care, avoid bending or local pressure, prevent the foam core from cracking and the panel from sinking, and keep the overall integrity.
Vapor barrier: Continuously lay the vapor barrier to prevent moisture from invading the foam core, which could lead to an increase in thermal conductivity and freeze-thaw damage.
Fire safety: All auxiliary materials (sealants, fasteners, etc.) should match the fire resistance rating of the panel. Flammable foam adhesives should be avoided to ensure the overall fire resistance performance of the system.
Maintenance: Regularly inspect the corrosion of the coating, exposure of the foam core, mechanical damage and the integrity of the sealant. Timely repair can significantly extend the service life.
Engineering principles and installation guidelines
1. Structural design
E calculates based on the wind load, seismic action and live load at the project site to determine the span of the slab, the spacing of the keel and the thickness of the core material.
The thickness of the panel, the strength grade of the steel plate and the density of EPS should be matched to ensure that the ultimate state deflection is ≤L/240 (or a stricter value specified).
2. Installation best practices
Ensure that the substructure or frame is vertical and square.
The panel must be installed using appropriate fasteners and adhesives compatible with EPS.
The joints should be sealed with fireproof sealant or tape to prevent air and moisture from seeping in. It is recommended to use edge banding and waterproof coatings in damp areas. Mortise and tenon joints can enhance thermal continuity and structural stability.
Thermal insulation joints and expansion joints must be set up to accommodate the movement of the building.
3. Safety Precautions
The panels must be used in combination with non-combustible finishes to comply with fire safety regulations.
During the cutting and installation process, wear PPE (dust mask, goggles, gloves). When using an electric dust collection cutting machine, it is essential to maintain good ventilation with a dust concentration of no more than 1 mg/m³ to minimize the inhalation of dust during the cutting process.
Waste materials are collected separately. EPS scraps are handed over to qualified recyclers for reuse. Burning is prohibited and incineration and burial are mixed for treatment.
Best Practices for Installing EPS Sandwich panels
1. Venue preparation
First, confirm that the bearing capacity of the structural supports is sufficient. Then, use a ruler to recheck the flatness of the base surface and correct the height difference in advance to prevent the plates from bending and deforming. Although EPS is light, it is vulnerable to sunlight and bumps. When temporarily stored, it should be shaded and protected from heavy pressure.
2. Sheet material handling
Lift and place gently throughout the process. Sliding and dragging are strictly prohibited. For large-sized board surfaces, vacuum suction cups or soft pad clamps are uniformly used to protect the integrity of the panels and edges.
3. Fixation and sealing
Select the fasteners and clamps that match the EPS sandwich panel, and the torque should be carried out as recommended by the manufacturer. High-performance fireproof sealant is continuously squeezed into the joint and waterproof gaskets are attached to form an airtight moisture-proof layer. At the same time, leave sufficient heat insulation joints and expansion joints as shown in the figure to adapt to temperature deformation.
4. Safety measures
Wear dust masks, goggles and anti-cut gloves in the cutting area and keep it well-ventilated. EPS debris should be classified and bagged, and promptly handed over to the recycler. It is strictly prohibited to discard it at will.
5. Production optimization
The production lines within the factory are compactly laid out, with short distances between components and workshops. This enables rapid material flow, reduces the number of handling operations, and saves logistics costs.
