What is an Air Filter?
An air filter is a device used to purify air. It is commonly used in clean rooms, laboratories, operating rooms, and for dust prevention in electronic equipment. Depending on their filtration efficiency, air filters are divided into primary filters, medium-efficiency filters, high-efficiency filters, and ultra-high-efficiency filters. Each type has its specific standards and performance levels.
The History of Air Filters
- First Century Rome: People used masks made of coarse linen to protect themselves while purifying mercury.
- 1827: Brown discovered the movement patterns of tiny particles, which helped people better understand the principles of air filtration.
- World War I: Due to the use of chemical agents, military gas masks with asbestos fiber filter paper were developed.
- 1940: Glass fiber filter media was patented in the United States, becoming an important material for air filtration.
Materials Used in Air Filters
- PP Filter Paper: Lightweight and efficient, suitable for basic filtration.
- Glass Fiber Filter Paper: Known for its high efficiency and durability.
- Polyester Fiber Material: Strong and flexible, widely used in various applications.
- Activated Carbon Material: Effective at removing odors and chemicals.
- Non-Woven Fabric: Affordable and suitable for many scenarios.
- Plant Fiber Material: Eco-friendly and performs well in certain filtration needs.
Why Are Air Filters Important?
Air filters play a crucial role in keeping the air clean and safe. They are widely used in industries such as healthcare, electronics, and manufacturing. By understanding their history, types, and materials, you can choose the right filter for your specific needs.
