Characteristics of Polyester Film Sandpaper as a Grinding Tool

General polyester film sandpaper is made by using a synthetic resin binder to uniformly coat abrasive grains on a polyester film substrate. Coating methods can be roughly divided into electrostatic coating method and roller coating method. However, most recent polyester film sandpapers use the latter, that is, after mixing abrasive grains with a particle size of 0.1 to 16 μm and a binder, they are made by applying roll coating to the surface of the polyester film substrate. It has a highly uniform surface structure with abrasive grain cutting edges, which is suitable for grinding processes that require high-precision finishing surfaces.

The characteristics of polyester film as a grinding tool are summarized as follows:

①According to the choice of abrasive particle size and limiting the range of particle size composition, the height distribution of abrasive particles can be made neat, so a high-precision processing surface can be obtained;

②Because the polyester sandpaper films are flexible, they can be adapted to surface grinding;

③The polyester film sandpaper can be made into rolls or belts, and it can be continuously fed during grinding, so there is no change in abrasive passivation during grinding, and homogeneous surface accuracy can often be obtained, and it is also easy to achieve automation of grinding;

④Because it is a fixed abrasive grinding process, it can keep the working environment clean.

Polyester film sandpaper performs grinding according to the pressure grinding mechanism of the elastic tool that fixes the abrasive grains. Due to the difference of the binder and the base material, its softness and elasticity are also different, so the grinding characteristics have great changes. In addition, the higher the requirements for the precision of the grinding surface, the finer the abrasive particles coated on the polyester film sandpaper.