Is there a relationship between the sun-proof strength and the color of the roof film of the parking shed?
2025-06-11 12:18
The sunlight intensity of the parking shed roof film is related to the color, but the core influencing factors are still the material of the film itself and the anti-ultraviolet coating process. Color mainly indirectly affects the sun-proof effect through the reflection and absorption characteristics of light, and the specific relationship is as follows:
1. The influence mechanism of color on the effect of sunlight protection
Difference between light reflection and endothermy
Light colors (such as white, silver): higher reflectivity to ultraviolet and visible light (up to 70%~90%), less heat absorption, lower membrane temperature, can delay the aging of materials due to high temperatures.
Dark colors (e.g., black, dark gray): low reflectivity (typically <30%), easy absorption of light energy into heat, higher membrane temperature, may accelerate the thermal and oxidative aging of materials.
UV absorption characteristics
Although some dark-colored film materials (such as adding carbon black pigments) absorb more heat, carbon black itself has a certain ultraviolet shielding effect, which can help enhance the ability to resist UV rays (in combination with the coating process); The UV protection of light-colored films is more dependent on the UV additives (e.g., light stabilizers, UV absorbers) in the coating.
Second, the material and coating are more critical than the color
The material determines the basic performance
Regardless of the color, the UV resistance of polymer films such as PVC and PVDF is mainly determined by the molecular structure and additives:
PVDF film (fluorine-containing material) is inherently weather-resistant, and the UV blocking rate has a low correlation with color.
Even if ordinary PVC film is made in a light color, if there is not enough anti-UV additives, the sun resistance is still insufficient.
The coating process is the core guarantee
Surface UV-resistant coatings (e.g. fluorocarbon, PVDF) provide color-independent protection:
White film PVDF coating: UV blocking rate ≥ 95% while reflecting heat;
If the black film is not coated, even if the color is dark, ultraviolet rays can still penetrate the film and cause aging.
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