How strong is the sun-proof roof film of the parking shed
2025-06-11 12:17
The strength of the roof film in a carport against sunlight (i.e. UV resistance) is usually measured in terms of UV blocking rate or UV protection level, and the general requirements are as follows:
Common indicators of sun intensity
UV Blocking Rate:
The UV blocking rate of mainstream films (such as PVC, PVDF films) is usually ≥ 95%, and high-quality films (such as fluorine-coated films) can reach more than 98%, which can effectively block UV-A and UV-B bands.
Weathering years:
The anti-aging life of qualified products in outdoor environments is generally 5~10 years, depending on the film type and coating process (e.g., PVDF coating is more weather-resistant than ordinary PVC coating).
Core influencing factors
Membrane Type:
PVC film: anti-UV additives need to be added, and the barrier rate is about 95%~98%.
PVDF film (polyvinylidene fluoride): with its own UV resistance, higher barrier rate and better weather resistance.
ETFE film: high light transmittance (more than 90%), but requires additional coating treatment, UV blocking rate ≥ 95%.
Coating process:
Anti-UV coatings, such as fluorocarbon coatings, enhance sun protection and reduce film aging and cracking.
Simple judgment method
Check the results of "ultraviolet transmittance" or "weather resistance test" in the product test report, and the qualified products should pass the artificial accelerated aging test (such as xenon lamp aging test) for ≥ 1000 hours without obvious fading and cracking.
If you need a specific value, you can directly consult the film supplier and provide the use scenario (such as regional light intensity, installation orientation, etc.) to match the appropriate sun protection level.
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