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2022
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Common Issues with Glass Protective Films and Methods for Eliminating White Spotting
When users install glass and peel off the protective film, the adhesive on the film’s surface often remains on the glass rather than coming off with the film—something no one wants to see. Next, we’ll discuss common issues with glass protective films and how to eliminate the white‑spot phenomenon.
When the user installs the glass, while peeling off the protective film from the glass surface, Glass protective film The adhesive on the surface does not come off with the protective film; instead, it remains on the glass product—something users certainly don’t want to see. Next, we’ll discuss common issues with glass protective films and methods for eliminating white‑spot defects.
If the adhesive from the surface of a glass protective film remains on the glass product, someone has to scrape it off, which is extremely labor‑intensive and time‑consuming. There are many possible causes for this issue. A major possibility is that the pressure‑sensitive adhesive used in the protective film does not meet the specified requirements—its adhesion is too strong, so when the film is peeled off, the external force exceeds the internal stress, leaving residue on the glass.
After a period of use, glass protective films often exhibit a common issue: edge lifting. The primary cause of this phenomenon is that, during application, the film is subjected to significant stretching relative to the glass it protects. Once applied, exposure to high-temperature environments can trigger unwanted shrinkage. This problem has been observed in products used by customers in southern regions; therefore, when manufacturing PE protective films, it is essential to account for environmental temperature variations and their potential impact on product performance. During installation, some degree of surface tension—and thus unintended stretching—is unavoidable.
The glass protective film and related protective products are not firmly adhered, leading to lifting and peeling during transportation and use. The underlying causes are the opposite: insufficient adhesion may result from inadequate sensitivity in the manufacturing process, while for PE protective films, it could be due to insufficient application pressure or contamination on the surface—such as dust, paint, or other residues—which compromises the adhesive’s performance. If these issues arise, adjust the adhesive formulation as needed to enhance film‑pressing force, or ensure thorough cleaning of the surface to prevent such problems.
Glass protective film: Based on past experience, the appearance of white spots on PE protective films is not uncommon, and their causes are typically multifactorial. Regardless of the underlying reasons, such defects can adversely affect the performance and usability of the product. Is there a method to effectively eliminate these white spots from PE protective films?
Glass protective film: On the one hand, within standard specifications, the particle size and particle-size distribution of domestically produced inks are strictly controlled at the film‑manufacturing stage, and a dedicated adhesive is selected for electronic protective films to enhance the spreading performance of the surface coating. Since the adhesive must be properly matched to the anilox roller’s line count, it is crucial to avoid significant deviations from this optimal range, as such mismatches can damage the adhesive layer and lead to the formation of white spots.
Glass protective film: Alternatively, an electronic coating process can be employed to prevent ethyl ester from penetrating the ink layer unevenly. The applied adhesive ensures a uniform and thorough coverage of the adhesive layer’s surface, effectively eliminating white spots. In addition, regularly cleaning the coating rollers and thoroughly removing any residual adhesive will also significantly help reduce the occurrence of white spots.
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