2025-01-06
What is the classification of rubber insulation cotton grades
The oxygen index is one of the key indicators for determining the grade of rubber insulation cotton. It refers to the minimum oxygen concentration required to maintain stable combustion of rubber insulation cotton under specified conditions, expressed as the volume percentage of oxygen. There are clear requirements for the oxygen index of different grades of rubber insulation cotton, such as zero grade ≥ 39, B1 grade ≥ 32, B2 grade ≥ 26. The higher the oxygen index, the stronger its fire resista...