In the grinding industry, sandpaper is widely used. Sandpaper can be divided into dry sandpaper, waterproof sandpaper, and sponge sandpaper. What they have in common is that different abrasives and sandpaper substrates are bonded together using a binder.
Waterproof sandpaper is made of a water-resistant substrate or a water-resistant substrate as a substrate, a synthetic resin or varnish as a binder, and aluminum oxide or silicon carbide is bonded to the substrate. Since waterproof abrasive paper can be immersed in water for grinding, waterproof sandpaper is also called water-resistant sandpaper or water sandpaper.
The gap between the sand grains of waterproof sandpaper is small. When used alone, the debris generated by the waterproof abrasive paper and the workpiece is not easy to clean out. This requires using it with water to make the debris flow out with the water, so that the sandpaper surface remains clean and achieves a fine grinding effect. In addition, waterproof sandpaper is suitable for post-processing. Dry sandpaper does not seem to be that troublesome, because the gap between the abrasives of dry sandpaper is large, and the debris ground between the dry sandpaper and the workpiece will fall off due to the large gap during the grinding process, but dry sandpaper is generally suitable for coarse grinding.
At the same time, waterproof sandpaper is generally used for grinding under water conditions, so there is less dust and better working conditions. Although dry sandpaper has the characteristics of anti-clogging, anti-static, good flexibility and high wear resistance, it is heavily polluted by dust and requires appropriate protective equipment during operation (but it is acceptable to face the powerful function of dry sandpaper).
