Methods for dealing with bubbles in protective film

Selecting suitable ink and increasing the coating amount is particularly important for dry lamination white ink, as its impact is multifaceted.

Enhancing the wettability of the adhesive on the film, improving defects such as poor localized adhesive application, increasing the coating amount, increasing the temperature and pressure of the lamination roller, using a smooth roller, reducing the lamination speed, increasing the wetting time and adhesive application time, selecting an adhesive with good wettability, and preheating.

Preheating the adhesive and film, and increasing the temperature of the lamination roller.

Cleaning the coating roller, and strengthening the management of the coating amount and the coating roller.

Adjusting the viscosity, replacing the coating roller, and within the viscosity range that meets the process requirements, matching the adhesive solids content with the coating roller to meet the coating amount requirements.

Adjusting the drying conditions.

Increase the coating amount and the temperature and pressure of the composite roller to improve the rubber hardness of the roller, raising it to between 80-85℃. Adjust the "wrap angle" of the film introduced into the composite roller before the roller, ensuring it enters the roller tangentially as much as possible.