Corona Treatment Of Gas-expanded Shaft Is Good Or Bad

The current popular theory is that the corona treatment rearranges the molecular structure on the surface of the substrate to produce more polar parts, which is conducive to the adhesion of foreign objects. The traditional theoretical corona treatment makes the surface of the substrate rough, so it is wrong to easily adsorb printing inks and adhesives.
 
Corona treatment is a post-processing. It should be pointed out that corona treatment is not the only treatment that can be used to change the surface energy of substrates in the production of substrates. Other treatment methods include flame treatment and coating treatment. The specific treatment method depends on the structure of the substrate.

The unit of measurement of surface energy is dyne. All liquids and most substrates (except the porous type) can measure ten dyne. In order for the printing ink to adhere well to the surface of the substrate, the dyne value of the substrate should be 10 dyne higher than that of all inks.

The surface energy of water-based inks is higher than that of solvent-based inks, so the substrate must also have a high surface dyne value. Everything in nature has the characteristics of returning to the original state. The higher the factor, the faster the processing energy decays.

Therefore, when printing with water-based inks on films, metal foils and some papers, secondary treatment should be performed before printing. When using a corona treatment device on the printing machine (matched properly), the processing level of the film can be extended to the original Energy level (or slightly higher).