Sandwich panels productive process
Product details
Why do you choose the Duowei PIR sandwich wall panel?
Insulated metal PIR PU foam sandwich panel provides 30-50% higher insulation performance than traditional insulation materials such as glass wool, rock wool or polystyrene. Different thicknesses correspond to different heat transfer coefficients. This applies to environments that need constant temperature, such as cold storage, greenhouses, slaughterhouses, farms, etc.
The fireproof grade of the PIR sandwich panel is B1, which has a good flame-retardant effect. It is difficult to catch fire when exposed to naked flames or high temperatures in the air, and it is not easy to spread quickly. When the fire source is removed, the burning stops immediately.
At the same time, under the same vertical load conditions, PIR sandwich wall panels of different thicknesses can be selected to adapt to various building structures and design requirements with strong flexibility.
| Allowable Vertical Load and Heat Transfer Coefficient of Duowei PIR Sandwich Wall Panel (Allowable Deflection f≤L/200) |
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| Panel thickness (mm) | Heat transfer coefficient (W/m2k) |
Weight(kg) | Loads (P=KN/m2) |
0.60 | 0.80 | 1.00 | 1.20 | 1.50 |
| 50 | 0.46 | 10.06 | L(m) | 3.52 | 3.04 | 2.69 | 2.42 | 2.11 |
| 75 | 0.3 | 11.06 | L(m) | 4.71 | 4.09 | 3.64 | 3.29 | 2.89 |
| 100 | 0.23 | 12.05 | L(m) | 5.76 | 5.02 | 4.47 | 4.05 | 3.56 |
| 120 | 0.19 | 12.84 | L(m) | 6.53 | 5.68 | 5.07 | 4.60 | 4.04 |
| 150 | 0.15 | 14.04 | L(m) | 7.56 | 6.58 | 5.87 | 5.32 | 4.68 |
| Note: 0.5mm outer steel sheet and 0.4mm inner steel sheet | ||||||||
Advantages
Lightweight and high strength
The PIR sandwich panel is easy to install and transport due to its lightweight. At the same time, its sufficient strength and stiffness can meet the requirements of most building structures.
Thermal insulation
PIR core material has extremely low thermal conductivity, which can effectively prevent heat transfer, significantly reduce the energy consumption of the building, and save cooling/heating costs.
Good integrity
The PU foam sandwich panel has an integral structure, which avoids gaps and leakage problems that are easy to occur in traditional structures.
Green and environmental protection
Duowei PIR composite boards employ a cyclopentane no-fluorine polyurethane foaming technology, highly environmentally friendly, no influence on the ozone sphere and greenhouse effect.
Customized Service
Duowei can customize the color, painting and galvanizing of composite boards to meet different aesthetic and functional requirements.
Unique Design
The unique tongue and groove enhances the wind resistance, waterproof, thermal insulation, corrosion resistance of Duowei sandwich wall panel.
Properties of Duowei PIR PU foam sandwich panel
Clients can choose the color, painting, and galvanizing according to the project location, indoor use and specific needs.
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Properties of Duowei Polyurethane Sandwich Panel |
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Color range |
Customized |
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Insulated core |
PIR |
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Painting |
Polyester PE, SMP, HDP, PVDF etc. |
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Galvanizing |
Hot-dip zinc,Hot-dip Al-Zn,Hot-dip Zn-Al-Mg |
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Recommended steel coil supplier |
Baosteel, YIEH PHUI, BLUESCOPE etc. |
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Profile |
Ripple, flat, square wave |
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Decorative gap |
Gapless, 10mm gap, 20mm gap |
Different profiles and decorative gaps meet the aesthetic needs of the building.
Recommended Type
There are two types of Duowei PU foam sandwich panels, secret fastened and through fastened.
For the secret fastened type, nails are concealed. This tongue and groove perform better in waterproof and wind resistance.
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Recommended Type I -- Concealed | ||
| Parameter | Profile | Steel Sheet | |
| Thickness of exterior facing (mm) | Ripple (R) | 0.45-0.7 | |
| Square (S) | 0.45-0.7 | ||
| Flat (F) | 0.6-0.8 | ||
| Thickness of interior facing (mm) | Square (S) | 0.4-0.7 | |
| Flat (F) | 0.5-0.7 | ||
| Effective width (mm) | 500-1200 | ||
| Thickness (mm) | 50/75/80/100/120/150 | ||
| Decorative gap (mm) | 0,10,20 | ||
For the through fastened, nails are exposed to the environment, which is prone to corrosion along with high maintenance costs. However, the thermal insulation effect of this type is great and not easy to see the cold bridge phenomenon.
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Recommended Type II -- Exposed | ||
| Parameter | Profile | Steel Sheet | |
| Thickness of interior/exterior facing (mm) | Ripple (R) (Exterior facing) |
0.4-0.8 | |
| Square (S) | 0.4-0.8 | ||
| Flat (F) | 0.5-0.8 | ||
| Effective width (mm) | 500-1230 | ||
| Thickness (mm) | 40/50/60/65/70/75/80/100/125/150/170 | ||
| Decorative gap (mm) | 0 | ||
Process Flow
From decoiling to packaging, Duowei adopts automatic integrated production technology. With strict control over every link, the finished PIR PU foam sandwich panel has high flatness and excellent quality.
Packaging
The PIR PU foam sandwich panel is packed with plastic film. The steel sheets at each corner provide special protection to avoid collision during transportation. The steel channel underneath facilitates loading into containers. The product name, model and other information are printed on the packaging for identification and management, improving work efficiency.
Application
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