sandpaper, what kind of production technology

First, what are the types of sandpaper? There are many types of sandpaper, including sponge sandpaper, dry abrasive paper, sand paper mill and so on. Product main role is to grind metal, wood  standard abrasives and other surfaces to make them smooth and smooth.
1 dry sanding paper: suitable for rough or polished some of the rough stuff, such as iron pipes metals.
 2 sponge sandpaper: Suitable for sanding smooth part of a variety of materials can be. 3 mill sandpaper: relatively thin texture, water mill grinding some texture sandpaper for more delicate things, and is suitable for post-processing;
It is one of the mill grit sandpaper gap between the small, very fine grind is also smaller, when used in conjunction with water flowing out will be very fine, so use with water, if water sandpaper to get nonwoven belt  it dry grinding very fine sand is left in the gap, the abrasive surface becomes less than that of the light so as to achieve some effect, it is a large gap between the sand out of the very fine grinding is larger in the grinding process of its big reason of the clearance will fall to very fine, it does not need to use with water. Second, sandpaper production technology first: mechanical polishing, with the installation of a glass polishing wheel polishing machine, dip glass polishing powder on the glass surface polishing, polishing the  cutting and grinding disc same operation process with the other. Second: Chemical polishing: the glass surface with a chemical polishing solution, the operation process, there are two, that is the whole cell method soaking the glass was immersed in the liquid pool 2 to 3 hours and finally clean, for glass both sides polished and glass-sided immersion or not polished surface protection film attached, affixed with tape from one edge of the block waterside, flat glass after glass surface of the liquid down in the depth of not less than 3 mm and as uniform as possible, 2 to 3 hours to finally clean.