In the field of contemporary architecture, building materials that are energy-saving, environmentally friendly, convenient to construct and beautiful and durable are becoming more and more popular. As a multi-functional building material, sandwich wall panels are widely used in industrial plants, commercial buildings, cold storage, temporary buildings and other fields with their excellent thermal insulation, sound insulation, fire prevention and lightweight characteristics. This article will introduce the sandwich wall panel in detail from the aspects of structure, advantages, application scenarios and purchase points.
1. The structure and material of the sandwich wall panel
The sandwich wall panel adopts a sandwich-style composite structure, which is composed of a surface protective panel, an intermediate core material and a high-strength adhesive layer.
a. Outer protective plate：
Usually use color steel plate (aluminum-zinc plate), aluminum-zinc alloy plate, aluminum-magnesium-manganese plate or stainless steel plate, the surface is treated with PE/PVDF/SMP/HDP coating, corrosion-resistant, ultraviolet-resistant, and available in a variety of color options.
b. Core Material：
Common core material types are rock wool, polyurethane (PU), polystyrene (EPS), glass wool, etc. Different core materials have different thermal insulation, fire and sound insulation properties.
c. Adhesive layer：
High-strength polyurethane glue or modified acrylic adhesive is used to firmly bond the surface to the core material, which has been verified by peel resistance tests and has a bond strength of more than 15N/mm², ensuring that the structural integrity of the sheet remains in extreme temperature environments from -40°C to 80°C.
According to the requirements of application scenarios, the standard thickness of sandwich panels covers 50mm, 60mm, 70mm, 75mm, 80mm, 100mm, 120mm, 150mm and other specifications, and supports customized production to match different building energy saving standards.
2. The core advantages of sandwich wall panels
a. Taking polyurethane sandwich panels as an example, its thermal conductivity is reduced by more than 80% compared with traditional brick-concrete walls, and the use of 100mm thick plates in the severe cold areas of the north can reduce building energy consumption by 40% year-on-year, significantly reducing heating costs. In the humid and hot areas of the south, sandwich panels with reflective thermal insulation coatings can effectively block solar radiation, and the indoor temperature can be reduced by 3-5°C.
b. Fire rating
For different building fire protection needs, sandwich panels provide a variety of fire protection solutions:
Class A non-combustible rock wool board and glass wool board are widely used in chemical workshops, data centers and other places with high fire protection requirements;
Class A non-combustible rock wool board and glass wool board are widely used in chemical workshops, data centers and other places with high fire protection requirements;
B1 flame retardant polyurethane board occupies the mainstream in commercial complexes, office buildings and other civil buildings, and its self-extinguishing characteristics in case of fire meet the GB8624-2012 fire protection standard.
c. Lightweight and high strength coexist
The weight per unit area of the sandwich panel is only 5-15kg/㎡, which is about 1/10 of the traditional concrete wall, which greatly reduces the load of the building structure and can reduce the amount of steel structure by 30%.
At the same time, the compressive strength of the panels is up to 150-300kPa, and in typhoon-prone areas, the specially strengthened sandwich panel exterior walls can withstand strong winds above level 12.
d. Quick installation, which can greatly save costs
The sandwich panel with modular design can be installed more than 5 times more efficiently than traditional masonry.
The actual measurement of a 20,000-square-meter industrial plant project shows that the use of sandwich panel exterior walls can shorten the construction period by 45 days, save labor costs by about 20%, and reduce construction waste emissions by 60%, which is in line with the concept of green construction.
e. Beautiful and durable
The pre-painted panels are available in a variety of colors, such as off-white, silver-gray, and ocean-blue, and can also be customized according to the Raul color card to meet the needs of different architectural styles. And the steel plate coating has strong weather resistance, and the service life can reach 20-30 years.
3. Main application scenarios
a. Industrial buildings: factories, warehouses, logistics centers
b. Commercial buildings: supermarkets, showrooms, office buildings
c.Cold chain logistics: cold storage, refrigerated trucks
d. Public facilities: hospitals, schools, gymnasiums
e. Temporary buildings: on-site dormitories, emergency housing
4. How to scientific purchase
a. Select the core material according to your needs
1.)High fire protection requirements→ choose rock wool sandwich panels
2.)Strong demand for thermal insulation → polyurethane (PU) sandwich panels
3.)If you have a limited budget→ choose EPS sandwich panels
b. Pay attention to the thickness of the panel
1.)In cold areas, it is recommended to ≥ 100mm to enhance the thermal insulation effect
2.)50-75mm in ordinary climate can meet the demand.
c. Check the quality of the surface coating
1.)PE coating: economical type, suitable for general environments.
2.)PVDF coating: more weather-resistant, suitable for coastal or highly polluted areas.
d. Choose a regular manufacturer,Check out fire test reports, ISO certifications, and more.
e. Future development trends
With the popularization of green buildings and prefabricated buildings, sandwich wall panels will develop in the direction of higher fire rating, better environmental performance (such as recyclable core materials), and intelligence (integrated photovoltaic power generation), becoming the mainstream choice of future buildings.
Hot Tags: sandwich wall panels, China sandwich wall panels manufacturers, suppliers, factory
