Factors Affecting the Appearance Quality of PET Release Film (2)-Film Supplier

by:POLYVA     2021-10-31
Coating heads At present, the coating heads widely used by silicon coating enterprises in our country are mainly based on the methods of scraping bar, anilox roller, roller coating, and multi-roller coating. It is nothing more than slightly improved appearance performance. Essentially, the improvement is no more than 20%. However, foreign countries use micro-engraved rollers with a certain angle for coating, which has improved the transparency from an optical point of view, and also completely eliminated the possibility of rainbow patterns. A reasonable temperature curve is also the core point to solve the problem of PET release film appearance. What is the temperature when entering the drying tunnel? What temperature is most conducive to the volatilization of the solvent? What temperature is most conducive to the curing of silicone? What temperature is most conducive to the stability of the release layer? These are all crucial. Rewinding situation The quality of the rewinding is also considerable. Some equipment manufacturers, because of the backward manufacturing process, when winding the PET release film, they either use a large tension to rewind (not easy to run), but it will cause the film to deform and be injured. Some use very small tension to rewind, the film is easy to run off, and it is also injured. Therefore, it is very important to be able to rewind neatly on the coating machine. Squeegee coating Squeegee coating often has uneven glue application. PET release film is mainly related to the processing accuracy of the squeegee, the installation method of the squeegee, the angle between the squeegee and the backing wheel during coating, and the viscosity of the coating. The flatness accuracy of the squeegee is required to be high, which means that the squeegee does not warp, deform or chip, otherwise the coating amount will have a large error. According to Coating Online, during coating, the angle between the contact tangent of the doctor blade and the rubber roller is generally between 15 degrees and 30 degrees. It is easy to cause vibration during operation, resulting in uneven coating and large differences in coating amount. It can even cause the coated film surface to be uneven and scratched, and it can also cause damage to the blade of the squeegee. Is a company specializing in the production of PET film with multiple functions, such as: transparent PET film, milky white PET film, release PET film, supply of PET motor film, etc. With a wide variety of products, affordable prices, and environmental protection, we provide customers with excellent quality and service based on the service tenet of excellence in production, honesty and trustworthiness in distribution, and warm and thoughtful service. Interested parties welcome to inquire!
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