What is the reason why there are particles on the surface of the plate after sealing edge

What is the reason why there are particles on the surface of the plate after sealing the edge? After the plate furniture is sealed, it is found that the surface of the plate is pressed with some small particles. This situation is generally due to some impurities in the trim edge being pressed on the plate. It is mainly the difference in equipment. Some equipment is equipped with automatic dust absorption devices, and the power and effect of dust absorption devices of different brands and different types of sealing machines are also different. If there are still some impurities on the plate, It can be cleaned easily by hand.