Sanding paper is a kind of paper with abrasive particles attached to it, which is used to level the surface of an item, or to remove attachments on the surface of an item, such as old paint, and sometimes to increase friction. Sandpaper is divided into different numbers according to different roughness, for different purposes. The earliest records of sandpaper appeared in China in the 13th century. People at that time glued crushed shells, seeds and sand onto the paper. Sharkskin is also sometimes used as sandpaper. The Comorians once used coelacanth scales as sandpaper.
The History Of Sanding Paper
In 1916, 3M Company invented waterproof sandpaper. This invention made it possible for water to act as a lubricant and to carry away finer particles more easily. There are many different types of sandpaper. In addition to paper, other materials include cotton and rayon, rubber, etc.
Commonly used grinding materials are alumina, most commonly used for metal and wood, garnet, mainly used for woodworking, alumina ceramics and other abrasives. Generally, the harder the material, the easier it is to grind. Generally, there will be numbers on the sandpaper to indicate its roughness. The larger the number, the finer the particles on the surface.
The brushed sheet is a product that is punched out by flocking the back of a large roll of sandpaper and then punching it through a punching machine with various types of knife dies.
Sand surface classification of brushed sheet: red sand surface, white sand surface, yellow sand surface, green sand surface, blue sand surface, black sand surface, etc. The raw materials of sandpaper are divided into silicon carbide, alumina and zirconium corundum. Silicon carbide is divided into green silicon carbide and black silicon carbide. Alumina is divided into brown corundum and white corundum, and brown corundum is divided into ordinary brown corundum, calcined brown corundum, semi-brittle corundum, etc.
The application of sanding disc
The biggest difference between the brushed sheets is that the flannel isplanted on the back, which is easy to distinguish from the adhesive-backed disc sand. The brushed sheets are easier to replace in use than the adhesive-backed disc sand, and the polishing efficiency is improved; Greatly improve the degree of wear resistance; brushed sheets are widely used in automobiles, hardware, electronics, furniture, plastics, handicrafts and other fields; it is faster, more efficient and more effective than hand-grinding products. Therefore, according to the object to be polished, choose the appropriate grit sandpaper or brushed sheet