Friends often mentioned that Shandong plastic floor has the characteristics of fire resistance and flame retardant, and its fire resistance reaches B1 level. So what does B1 mean? What are the combustion grades of PVC plastic floor?
1. Class a fire performance of building materials: non combustible building materials are divided into class A, which refers to materials that hardly burn.
2. Building materials fire performance B1: the fire-resistant building materials are classified into B1, and the fire-resistant materials have better fire-retardant effect. It is difficult to start a fire in the air or under the action of high temperature, and it is not easy to spread quickly, and the combustion stops immediately when the fire source is removed.
3. Building materials fire performance B2: Combustible building materials are divided into B2, combustible materials have a certain fire retardant effect. In case of open fire in the air or under the action of high temperature, the fire will burn immediately, which is easy to cause the spread of fire, such as wooden columns, wooden roof frames, wooden beams, wooden stairs, etc.
4. Class B3 fire performance of building materials: the inflammable building materials are divided into class B3, which have no fire-retardant effect, are easy to burn, and have great fire risk.
From the perspective of the fire rating standard of PVC plastic floor, the fire rating of PVC floor with the fire rating of building materials above B1 is qualified, so the PVC plastic floor has the characteristics of fire resistance and flame retardancy. Therefore, the fire rating of PVC plastic floor must be B1 or above according to the national regulations.