In the lithium battery coating process, the main reason why a vacuum is required under the coating beads is to ensure uniformity and quality during the coating process.
Vacuum can help remove the air under the coating beads and prevent the generation of bubbles. It can also improve the contact between the coating beads and the substrate, making the coating more uniform.
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The role of coating beads
During the coating process, the coating bead is an important tool used to control the thickness of the coating layer.
The shape and size of the coating beads will affect the thickness and uniformity of the coating layer.
The vacuum under the coating beads can make the contact between the coating beads and the substrate closer by absorbing the air under the coating beads, thereby improving the uniformity of the coating layer.
Necessity of Vacuum Under Coating Beads
The vacuum underneath the coating bead can also help remove air bubbles created during the coating process.
During the coating process, bubbles are easily generated due to factors such as the viscosity and surface tension of the coating liquid.
These bubbles will reduce the quality of the coating layer and even cause the coating layer to fall off.
By establishing a vacuum under the coating bead, these air bubbles can be effectively removed, thereby improving the quality of the coating layer.
Vacuum improves coating efficiency
Under the action of vacuum, the contact between the coating beads and the substrate is closer, and the permeability and diffusion of the coating liquid will also be enhanced. This allows the coating liquid to penetrate into the substrate faster and improves the speed and efficiency of coating.
Effect of vacuum on solid content and density
The vacuum under the coating bead also has a certain impact on the solid content and density of the coating layer.
Solid content refers to the solid content in the coating layer, and density refers to the distribution density of solids in the coating layer.
Vacuum can help remove the air under the coating beads, making the solid content in the coating layer more uniform and the density more stable. This improves the quality and stability of the coating layer.
Sum up
The reason why vacuum is needed under the coating beads is to improve the uniformity, quality and efficiency of coating.
Vacuum can help remove air and bubbles under the coating beads, making coating more uniform and stable.
At the same time, vacuum can also increase the solid content and density of the coating layer, and improve the quality and stability of the coating layer.
