Oct 15, 2020
Everyone has heard of composite panels. When new houses need to be decorated, they will learn about building materials. You may not know what are polyurethane panels, composite panels, and other building materials. Let’s analyze the polyurethane panels and composite panels on the market. Classification.
What is polyurethane? The molecular backbone contains more carbamate genes. This large class of polymer is referred to as polyurethane. It is a polymer material between plastic and rubber. It has a large elongation rate and a wide range of hardness. Large adjustment range, wear resistance, and mechanical properties. Polyurethane has low thermal conductivity and good thermal performance. When the density of polyurethane is 35-40kg/m², the thermal conductivity is 0.018~0.024w/(m.k), which is the lower thermal conductivity of current insulation materials. In addition, when polyurethane is burned in a fire, the surface will be carbonized and coked, and no melting and dripping will occur. The insulation system does not have flame propagation.
So what is polyurethane composite board? Polyurethane composite panel also called PU Sandwich Panel, is a high-strength, energy-saving, green, and environmentally-friendly building board composed of upper and lower color steel plates and foamed polyurethane in the middle. Generally used in the roof and wall of industrial and civil buildings such as factories, shopping centers, villas, etc.
Advantages of Sandwich Panel
1. Heat preservation, heat insulation, sound insulation
The polyurethane composite board has excellent thermal insulation and sound insulation performance. Because of the small bulk density and low thermal conductivity of rigid polyurethane foam, a 5cm thick polyurethane composite board is about 1m thick concrete for the insulation effect. And polyurethane does not support combustion.
2. Advantages of roof panels
The polyurethane roof panels are connected by concealed nails and have a unique waterproof groove design, which effectively avoids the penetration of rainwater.
3. Advantages of wall panel
There are no exposed screws on the surface of the polyurethane composite board, which makes the building wall more beautiful. Polyurethane composite panels also have an extremely high flexural bearing capacity, reducing reliance on auxiliary steel structures.
4. Green and environmental protection
Polyurethane composite board is made of bio-based raw materials without adding harmful substances that are prohibited or restricted by the state, and it is green and environmentally friendly.
PU Sandwich Panel
What are the types of composite panels?
1: Rock wool composite board
Rock wool composite board uses basalt, iron ore, etc. as the main raw materials. It has the advantages of a lightweight, low thermal conductivity, heat absorption, non-combustibility, etc., good integrity, high rigidity, and mechanical properties of impact resistance and shear resistance. Not enough integrity and rigidity, flexural and impact resistance is poor. Mainly used in building walls, firewalls, etc.
2: Paper surface gypsum composite board
It is a heat-insulating sandwich panel made of self-extinguishing foamed plastic as a sandwich material and compounded through a specific production process. Widely used in building internal and external wall insulation systems.
The fire performance reaches the flame retardant B1 level. Stronger thermal insulation capacity. The cost of the same effect is lower, and the cost performance is high. When the effect is the same, it is more cost-effective compared with other fire-resistant external insulation systems. Simple construction, good system integrity.
3: EPS Sandwich Panel is a heat-insulating sandwich panel made of self-extinguishing foamed plastic as the sandwich material, compounded with calcium silicate board, and compounded by a specific production process. The silica-calcium composite board has the properties of fire prevention, moisture resistance, sound insulation, and heat insulation. It can attract water molecules in the air when the indoor air is humid. When the air is dry, it can release water molecules, which can appropriately adjust the indoor dryness and humidity to increase comfort. sense. Strong thermal insulation ability, low cost for the same effect, high-cost performance, easy construction, and good system integrity.
