What is the main material of the JB-5 roll?

The main materials of JB-5 rolls usually have two parts: abrasive and backing.
Abrasive:
This is the granular stuff that directly takes part in the grinding process and decides the effect and efficiency of grinding.
For JB-5 rolls, the common abrasives are like aluminum oxide and zirconia and so on.
Aluminum oxide abrasive has medium hardness and good wear resistance. It's suitable for grinding many kinds of materials. Zirconia abrasive is sharper and more suitable for the grinding work that needs a higher surface finish.
The grit size of the abrasive, that is, the size of the particles, is also an important factor affecting the grinding effect. The grit size range of JB-5 rolls is wide. You can choose the right grit size according to the specific needs.
Backing:
This is the base material that holds the abrasive and decides the flexibility and durability of the sandpaper.
For JB-5 rolls, the common backings are fabric backings, such as JB-5 fabric and the like.
This fabric backing is soft and wear-resistant. It can fit the grinding surface well and provide a uniform grinding effect.
At the same time, the fabric backing also has good water absorption. It can reduce the heat and dust produced during the grinding process to a certain extent.