The Oxgen index of the fire retarding back-coating latex exceed not over70.

其阻燃背衬胶乳氧指数可达70以上。

The oxygen content of the materials used in our country is higher than that of the materials imported. Oxgen will greatly affect the fatigue properties as it forms oxide inclusions in material.

国内材料与国外先进材料的主要差别在于氧含量过高，氧在材料中形成氧化物夹杂，严重危害材料的疲劳性能。