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Fire rating of aluminum-plastic composite panels
Aluminum plastic panel is a material widely used in the fields of construction and decoration, consisting of two layers of aluminum panel and a layer of polyethylene (LDPE) plastic core layer. Although aluminum-plastic panels have various advantages, the fire resistance rating has become an important factor to consider when choosing aluminum-plastic panels, as the plastic core layer is prone to combustion. Below, we will introduce the fire resistance rating of aluminum-plastic panels.
1. B1 grade (flame retardant grade)
B1 grade is one of the higher fire resistance standards in aluminum-plastic panels. Aluminum plastic panels are made of special coatings and additives, which have high flame retardancy and can resist a certain degree of fire spread, bringing more safety guarantees to the construction and decoration fields. In B1 grade aluminum-plastic panel applications, the core layer generally uses non-toxic and environmentally friendly materials such as polyurethane (PU) or polypropylene (PP), which are safer and more durable than polyethylene.
2.A2 grade (non combustible)
A2 grade is the highest fire resistance standard among aluminum-plastic panels and also the highest safety grade pursued by various building products in the world. A2 grade aluminum-plastic panels have very high fire resistance. Even in extremely high temperature environments, they will not produce harmful smoke and toxic gases, and will not cause harm or danger to humans. A2 grade aluminum-plastic panels are basically non combustible, and the core materials used are all inorganic and non-toxic substances, such as rock wool or cellulose.
3.A grade (passed non combustible test)
A grade is a fire resistance standard in aluminum-plastic panels. Compared with A2, its fire resistance performance is slightly lower but it also has good safety performance. A-grade aluminum-plastic panels will burn, but during the combustion process, a large amount of water vapor will be released, causing the temperature to continue to increase, resulting in a weakening effect that can ensure a smooth disappearance in a fire without causing the fire to spread.
4. C-grade (flame retardant)
C-grade is a fire resistance rating in aluminum-plastic panels, and its fire resistance performance is lower compared to B1 grade. The core layer of C-grade aluminum-plastic panels generally uses specially treated polyethylene, which ensures its fire resistance through the addition of chemical flame retardants and stabilizers. However, there is still a certain degree of combustion in front of a fire source. Therefore, C-grade aluminum-plastic panels are not suitable for higher safety protection grades, but they can still be used in certain decoration applications.
In summary, the fire resistance rating of aluminum-plastic panels is an important indicator affecting their application in the field of construction and decoration. Different grades of aluminum-plastic panels are suitable for different grades of construction and decoration occasions, and need to be selected according to actual use and safety requirements
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