The Technology
Why do screens have filtration capabilities?
In recent years, an increasing number of consumers in the market have been choosing to purchase anti-haze screens, allergy-resistant screens, or dust-proof screens. The primary purpose of these products is to improve indoor air quality by blocking tiny suspended particles such as PM2.5, PM10, pollen, and dust. They protect the indoor environment from the impact of external air pollution while allowing fresh air to enter.
It's worth noting that there is a trade-off between the filtration efficiency and breathability of these screens. Generally, improving filtration efficiency leads to reduced breathability because the screen's structure used to capture particles restricts the flow of air. Therefore, there is a balance between high filtration efficiency and high breathability that needs to be considered based on specific usage scenarios and requirements.
The filtration principles of these screens are similar to how masks work, employing two main filtration mechanisms: physical filtration and electrostatic adsorption. Physical filtration captures particles through the tiny pores in the screen, while electrostatic adsorption utilizes the electrostatic effect of the screen fibers to attract particles onto the fibers. To enhance filtration efficiency, electrostatic charging is often used to improve particle capture, causing particles to become polarized as they pass through. This polarization effect, even for non-charged particles, creates a magnetic-like attraction between the particles and the fibers, significantly enhancing the filtration effectiveness of micron-sized fibers. This electrostatic adsorption mechanism is similar to how some medical masks work, enabling them to achieve high filtration performance.
In conclusion, anti-haze screens, allergy-resistant screens, and dust-proof screens represent advanced technology that can improve indoor air quality. However, when selecting these products, it's essential to consider the trade-off between filtration efficiency and breathability based on specific needs and environmental conditions.
