That is why the big specific surface area appears in the charred layer, which will also absorb smoke and flammability objects.

• 并且燃烧后的炭层内部孔洞表面吸附着大量的A12O3微粒，增加了树脂的比表面积，可以吸附燃烧所生成的可燃物和烟雾，从而达到阻燃和抑烟的效果。