According to the relevant standards of the "Combustion Performance Classification of Building Materials and Products", the combustion performance grade of rubber and plastic insulation materials is divided into B1 and B2 combustibility, and the combustion performance grade is directly related to its use safety. Therefore, it is particularly important to correctly distinguish the combustion performance of B1 and B2 grade rubber and plastic insulation materials. Below, rubber and plastic manufacturers will explain to you how to distinguish the combustion performance of rubber and plastic insulation materials.

1. Observe appearance and texture

First of all, we can preliminarily judge its combustion performance level by observing the appearance and texture of rubber and plastic insulation materials. B1 grade rubber and plastic insulation materials usually have a more uniform surface texture, a delicate feel, a more uniform color, uniform and fine pores, and a higher closed-cell ratio, so as to have better insulation performance; The surface of B2 grade rubber and plastic insulation materials may be smooth, but the texture is relatively soft, and the color may be uneven.

2. Check density and elastic recovery

Secondly, we can further distinguish the grade of combustion performance by checking the density and elastic recovery performance of rubber and plastic insulation materials. B1 grade rubber insulation material is usually higher density, more compact texture, and has better elastic recovery performance; The density of B2 grade rubber and plastic insulation materials is low, the texture is relatively loose, and the elastic recovery performance is poor.

3. Perform combustion test

Finally, you can use a small fire source, such as a lighter or match, to touch the flame to a small area of the rubber insulation material, and then observe its burning. B1 grade rubber and plastic insulation materials will be quickly extinguished after the flame catches fire, and the burning speed is slow; B2 grade materials may continue to burn, burning faster. This method needs to be used with caution and can only be used as a reference, not as the sole basis for judgment.

If the above three methods can not learn, Xiaobian can also teach you a simpler method - look at the logo

Generally speaking, B1 grade rubber insulation materials will be printed on the surface of the product B1 or class1 words, while the packaging will also have detailed manufacturer information, certification and other identifiers. These identification information is usually clear and standardized. The surface of B2 products may be smooth, but it lacks a clear B1 label, and the information on the packaging may be brief or vague.

The above several methods to distinguish the combustion performance grade of rubber and plastic insulation materials, have you learned?