How to solve the problem of bubbles in the production of protective film?
How to solve the problem of bubbles in the production of protective film? There will be bubbles in the production process of protective film, which affects the product quality of protective film, which is a headache for many protective film manufacturers. So if we encounter this problem, how should we solve it? In order to solve this problem, we have thought of many methods, such as selecting the appropriate ink and increasing the coating amount, enhancing the wettability of the glue to the protective film, and improving the local poor gluing. increase the temperature and pressure of the compounding roller; reduce the compounding speed to increase the soaking time and gluing time, etc.
When making the protective film, the glue and the protective film can be preheated and the temperature of the composite pressure roller can be raised; at the same time, the coating roller can be cleaned, and the management of the coating amount and the coating roller can be strengthened. For coating rolls, after the new roll is used to 5 million meters, it should be aluminum-plated, and then chrome-plated for three times and then re-engraved to prevent the problems of poor appearance and low peel strength caused by insufficient coating rolls.
In order to adjust the viscosity of the protective film, it is necessary to replace the coating roller regularly. Within the viscosity range that meets the process requirements, the coating amount can be met by the combination of the solid content of the glue and the coating roller. And adjust the drying conditions, such as wind speed, temperature and so on.
In addition, it is necessary to increase the coating amount used to manufacture the protective film and the temperature and pressure of the composite pressure roller, increase the rubber hardness of the pressure roller, and increase the rubber hardness of the pressure roller to between 80-85 °C. And adjust the angle of the "wrapping angle" of the protective film before the pressing roller, and try to enter the composite roller according to the tangential direction.
In addition, taking moisture-proof measures during the protective film forming process, such as keeping the environment dry, curing agent sealing the packaging material, etc., can also play a certain role in improving the bubble problem, thereby greatly improving the quality and use of the protective film.