How to Properly Apply Protective Film to Plastic Sheets

1. Thorough Surface Cleaning: 

Before applying the film, ensure the plastic sheet surface is free of dust, oil, water stains, and other impurities. These impurities can cause bubbles or peeling after application. First, wipe the surface of the plastic sheet with a soft, dry cloth to remove dust. If oil is present, apply a small amount of neutral detergent and gently wipe, then wipe away any detergent residue with a clean, damp cloth. Finally, thoroughly dry the surface with a dry cloth to ensure a clean and dry surface, creating favorable conditions for film application.

2. Material Pretreatment for Compatibility: 

If the protective film is stored in low or high temperature environments for a long time, the substrate may harden and the adhesion may become unstable. Before applying, allow the protective film to stand at room temperature for a period of time to restore its appropriate flexibility and adhesion. Also, pre-cut the protective film according to the size of the plastic sheet, leaving a small amount of edge space to avoid incomplete application due to size discrepancies, ensuring the protective film completely covers the area of the plastic sheet that needs protection. 

3. Follow Standard Laying Procedures to Ensure a Tight Bond

When laminating, first align one end of the protective film with the edge of the plastic sheet and gently secure it. Then, use your fingers or a scraper to slowly smooth it from the secured end to the other. Control the pressure during the process, pushing evenly to gradually remove air bubbles between the protective film and the plastic sheet. If air bubbles are found during lamination, gently lift the corresponding position of the protective film and smooth it again to remove the air. Do not pull the protective film directly to prevent deformation or damage. Ensure the protective film is tightly bonded to the plastic sheet.

4. Check and Reinforce the Bond After Lamination

After lamination, thoroughly check the adhesion of the protective film, looking for air bubbles, wrinkles, or edge lifting. If slight wrinkles are found, smooth them out with gentle pressing. If edges are lifted, check if it's due to incomplete surface cleaning or incomplete air removal during lamination, and repair accordingly. After confirming everything is correct, avoid immediately placing heavy objects or rubbing the plastic sheet surface. Allow the adhesive of the protective film to fully develop, further consolidating the bond and ensuring stable protection.