english How to judge whether the aluminum plate protective film has reached its service life
2025-07-19
Evaluating Protective Film Service Life
To judge whether the aluminum plate protective film has reached its service life, you can observe the changes in appearance, test the attenuation of performance and refer to environmental factors for comprehensive judgment.
Visual Inspection
Check for these signs of aging:
- Yellowing, brittleness, cracking, or edge curling/delamination
- Glue layer migration (local stickiness or glue marks)
- Residue when peeling or excessive glue stains
- Cloudiness or loss of transparency
Performance Testing
Conduct these practical tests:
- Viscosity test: Check if film easily falls off or is too hard to peel
- Tear resistance: Test if film breaks with slight pulling
- Weather resistance: Look for bubbles after rain or deformation after heat
Environmental Factors
Consider these usage conditions:
- Indoor films typically last 1-2 years
- Outdoor exposure reduces life to 3-6 months
- Check manufacturer's expiration date (often 18 months)
- Sample and test if beyond recommended period
Regular evaluation using these methods helps maintain optimal protection and prevents contamination or damage to aluminum surfaces from degraded films.
