The wood products or metal products we use in our daily life are all smooth, and the slightly more refined ones are even smooth and shiny. However, in fact, wood and metal are originally rough, and they become rough after post-processing. Be smooth, and in this process from rough to smooth, sandpaper plays a key role.

Sandpaper is a material specially used for polishing wood, metal, etc. There are dense small particles on the sandpaper, called sand grains. The reason why sandpaper can play a polishing role is also because of these sand grains. It is achieved through the friction between the sand grains and the object being polished. So how do the sand grains on the sandpaper get up?

Sandpaper is a material specially used for polishing wood, metal, etc. There are dense small particles on the sandpaper, called sand grains. The reason why sandpaper can play a polishing role is also because of these sand grains. It is achieved through the friction between the sand grains and the object being polished. So how do the sand grains on the sandpaper get up?

Sandpaper can be divided into dry sandpaper, water sandpaper and sponge sandpaper according to different abrasive substances. Their bottom plate materials and sandpaper densities are different, but the attachment methods of sand particles are similar. They are divided into electrostatic sand planting and gravity sand planting. Electrostatic sand planting relies on electrostatic electric field force to adsorb sand particles to the bottom plate. The distribution of sand particles implanted with electrostatic force is relatively uniform, but the power of static electricity is limited. If the sand particles are too large, they cannot be attracted, so the electric field force needs to be increased, that is, To increase the voltage and current, the production cost will also increase.

Gravity sand planting means to spread the sand directly from top to bottom without being limited by the size of the sand. The production cost is low, but the uneven distribution of the sand will lead to the sharpness and firmness of the sandpaper. Far inferior to electrostatic sand planting. After the sand is implanted, the work is not completed yet. The sandpaper with which the sand has been implanted has to be sent into the oven. The high temperature will gradually melt the sand into the curing agent, and then apply a layer of resin to fix it. Finally, wrap the sandpaper around it. onto reels, packaged and sold.