How Is Sandpaper Made?

1. Substrate printing

Abrasive Sandpaper, as the name suggests, is a combination of "sand" and "paper". However, the "paper" used as the base material here is not the usual A4 white or latex and kraft paper, but a large roll of special latex paper or special kraft paper. After it is unrolled, the product's function index and brand name are printed on one side of the paper. Wait for the information parameters to be printed.

2. Surface coating

Now, to the other side of the paper that is not printed, apply resin glue on the entire surface

3. Electrostatic sand planting

Feed the substrate glued side down into the static area. It's hot and humid here, creating an environment where the sand can electrostatically attach to the substrate.

The conveyor moves the prepared sand to the reel, and the static electricity on the abrasive cloth and the ground form an electric field. When the abrasive cloth passes through, the abrasive sand in the air is attracted to the abrasive cloth due to static electricity. To absorb enough sand grains, the abrasive cloth Will repeatedly enter the electrostatic chamber.

The grit is cascaded onto a conveyor belt, which transports it beneath the substrate.

4. Uniform adsorption

Applying an electric field to the sand grains triggers a small dust storm, and as the sand grains fly into the air, they stick to the hot-melt adhesive-coated substrate

After coming out of the static area, the hot melt adhesive was evenly attached to the sand

5. Baking and shaping

Send the sandpaper to the oven, and do a gradual heating, which will make the sand grains set on the glue

6. Glue layer

Then, apply a layer of resin on the rough surface of the sandpaper to make the "sand" and "paper" more tightly combined, and bake again.

 

7. Cutting shape

According to the scene of use, cut the sandpaper into the required shape

8. Factory packaging

Count the number of sheets according to the packaging requirements, make a package, and a box of sandpaper will complete the project

The production process of sandpaper seems simple, but there are still high technical requirements for the use of sandpaper in high-end applications