In our country, the flammability of homogeneous vinyl floor is divided into the following grades, A grade: non-ignitable vinyl floor sheet, B1: difficult to ignite commercial vinyl floor, B2: ignitable homogeneous vinyl floors, B3 Grade: It is easy to ignite PVC floor, through these conditions to judge the anti-ignition grade of PVC vinyl flooring! As an important part of the site, the floor should have the characteristics of fire prevention and flame retardant.