How long do pressure-sensitive labels last outdoors?
2025.12.14（Updated on 2025.12.15）
1. Key Influencing Factors
Material Composition:
- Face Stock:
PET (polyester) can last 3–5 years, PP (polypropylene) about 1–3 years, while paper labels typically last less than 1 year.
- Adhesive:
Acrylic adhesives offer better weather resistance than rubber-based adhesives. Outdoor-specific adhesives are designed to withstand UV exposure and temperature cycling.
- Liner:
Moisture-resistant liners can extend service life.
Environmental Conditions:
- UV Intensity:
Direct exposure to sunlight accelerates aging.
- Temperature & Humidity Range:
Extreme high/low temperatures (e.g., –30°C to 70°C), rain, and salt spray (coastal areas) can hasten deterioration.
- Chemical Exposure:
Acid/alkaline gases or solvents in industrial areas may corrode labels.
Printing & Processing:
- Ink Type:
UV-curable inks provide better UV resistance than water-based inks.
- Lamination/Coating:
Applying matte/gloss films or UV varnish can extend lifespan by 1–2 times.
2. Key Measures to Extend Weather Resistance
Material Selection Recommendations:
- Prioritize
PET/PVC/synthetic paper paired with outdoor-specific acrylic adhesive.
- Choose
UV-resistant inks and add protective lamination (e.g., matte film for scratch resistance, gloss film for enhanced water resistance).
Process Optimization:
- Apply
anti-UV coatings or adopt full lamination processes.
- Reinforce edge sealing to prevent moisture infiltration.
Installation and Maintenance:
- Avoid direct application on rough or porous surfaces (e.g., concrete walls).
- Regularly clean label surfaces of contaminants (dust, chemical residues).
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