BF型产品由无机不燃材料制成，BF-3型产品由无机和有机难燃材料复合而成。
Type BF partition is made of inorganic non-flammable materials, and type BF-3 compounded with both the organic and the inorganic non-flammable materials.
合成树脂瓦主体材料聚氯乙烯树脂自身属于难燃材料，经国家防火部门检测防火性能达到B1级。
Synthetic resin tile main materials in PVC resin oneself belong to flame retardant materials, the national fireproof department to examine fire performance reach B1 level.
按GB8624 - 1997《建筑材料燃烧性能分级方法》，本产品为b1级难燃材料，确保安全可靠。
According to GB8624-1997 "building materials combustion performance of grading method", this product is the B1 level flame retardant materials to ensure safe and reliable.
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