Is The Corona Treatment Of The Air Shaft Good Or Bad?

The current popular theory believes that corona treatment re-arranges the molecular structure of the substrate surface to produce more polar parts, which is conducive to attaching foreign objects. The traditional theory that corona treatment makes the surface of the substrate become rough, so that it is easy to absorb printing ink and adhesive is wrong.

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 the substrate in the production of substrates. Other treatment methods include flame treatment and coating treatment. Which treatment method is used depends on the structure of the substrate.

The unit of measurement of surface energy is dyne. All liquids and most substrates (except porous type) can be measured for ten dyne values. 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 the dyne value 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 higher surface dyne value. Everything in nature has the characteristics of returning to the initial state. Paper product processors want to achieve The higher the factor value, the faster the processing energy decays.

Therefore, when using water-based ink to print on films, metal foils and some papers, the secondary treatment should be carried out before starting the printing. When the corona treatment device is used on the printer (properly matched), the treatment energy level of the film can be extended to the original The energy level (or slightly higher).