First, sandpaper is usually not made of paper, but of chemical fiber, cotton and other fabrics. Firstly, the rolled cloth is put into a machine with a printing machine, and the product information on the cloth is printed on the drum with a magnetically attached rubber printing head. Then, the unprinted side is evenly spread on the roller for heating. Measure the density of the coating with a computer to confirm whether it is walking correctly. Then put the cloth in the underground electrostatic area, where the warm and humid environment is very suitable for abrasive particles to attach to the cloth electrostatically. Workers pour the abrasive particles into the underground conveyor belt, and the conveyor belt will send the abrasive particles under the cloth and between the electrode and the grounding plate. They will generate an electric field, which will trigger a small sandstorm, so that the abrasive particles will adhere to the coated cloth, evenly distributed and firmly embedded in it.
Second, then the cloth covered with abrasive particles rolls out of the static zone and returns to the upper layer. Next, take a small piece of sandpaper as a sample, then peel off the particle layer, and then make three different samples, one is only cloth, here is the cloth and glue layer, and the third is the particle layer and glue layer. Unexpectedly, each sample was then weighed to confirm whether the sand was made accurately according to the specifications, and then the surface of the particles was examined with a microscope to confirm that the particles were evenly distributed. After passing the inspection, the sandpaper will get a production license, and then they will be sent to a 9 1 meter-long oven, which is divided into three different heating zones, and the temperature inside will gradually increase.
Third, put the abrasive particles on the sandpaper into the adhesive layer. The baked sandpaper has basic roughness, but it can't be used yet It is necessary to coat a layer of resin on the surface of sandpaper, so that particles can be closely combined with mechanical mining. After the resin is cured, the large sandpaper roll is stored in the warehouse, and then cut into appropriate sizes as required. They can be used as tools for heavy manufacturing, sandbags and sandpaper boards for skateboards, and even for polishing furniture. Finally, these sandpapers with different mesh sizes can be packed and transported.