Why The Drum Brake Linings Have A Loose Surface?
The loose surface is the surface of the product, the density of the material is inconsistent, Some places appear loose. If you do physical inspection, you will find that the surface is hard. Degree is not the same as the hardness of other parts. The reason is that it is in the process of hot pressing, There are bubbles formed or the raw materials are not mixed evenly. Product with surface loose defects. The product is a non-conforming product and cannot be shipped. In use, it will affect the braking distance and generate noise
