What are the main differences in performance between dense-coated abrasives and open-coated abrasives?

I. Particle Distribution and Arrangement
Closely Coated Abrasives: The abrasive particles in this kind are really close together on the substrate, with almost no gaps. This way of arranging makes the abrasive particles contact the surface to be ground more evenly when working, so that a more uniform grinding effect can be achieved.

Open Coated Abrasives: In contrast, open coated abrasives have obvious gaps and open spaces between the abrasive particles. This design helps to prevent clogging during grinding, and it's especially suitable for situations where a lot of material needs to be removed or rougher surfaces need to be processed.

II. Grinding Efficiency and Effect
Closely Coated Abrasives: Because the particles are distributed tightly, closely coated abrasives usually have higher grinding efficiency and finer grinding results. They are good for applications that need high precision and a nice surface finish, like metal polishing and precision machining.

Open Coated Abrasives: Although the grinding efficiency of open coated abrasives might be a bit lower than that of closely coated abrasives, their stronger ability to remove material and the fact that they don't clog easily make them do well when handling rougher surfaces or removing a large amount of material.

III. Application Scenarios and Materials
Closely Coated Abrasives: Because of the fine grinding effect, closely coated abrasives are more suitable for situations where a high surface finish is needed, such as in automotive manufacturing, aerospace, and the field of optical instruments.

Open Coated Abrasives: Open coated abrasives are better for cases where material needs to be removed quickly or rougher surfaces need to be dealt with, like in the rough processing and pre-treatment stages in construction, shipbuilding, and mechanical manufacturing.

IV. Durability and Service Life
Closely Coated Abrasives: Because the particles are distributed closely and evenly, closely coated abrasives usually have a longer service life and are more durable. But this also depends on things like the specific type of abrasive, the quality of the substrate, and the conditions of use.

Open Coated Abrasives: The durability of open coated abrasives might be affected by the easy falling off and clogging of the abrasive particles. But under the right conditions of use, their durability can still meet general processing needs.