By Filtration Efficiency

1. Coarse Efficiency Air Filter Cotton：This type is designed to capture large particles such as dust, hair, and lint. It is commonly used in the initial stages of air filtration systems to protect more delicate filters downstream. Coarse efficiency air filter cotton has a lower resistance to airflow, making it suitable for applications where high airflow rates are required.
2. Medium Efficiency Air Filter Cotton：As the name suggests, this category targets medium-sized particles like mold spores and pollen. It offers a balance between filtration efficiency and airflow resistance, making it suitable for residential and commercial air conditioning systems.
3. High Efficiency Air Filter Cotton (HEPA)：HEPA filter cotton is renowned for its exceptional filtration capabilities, capable of trapping particles as small as 0.3 microns with an efficiency of 99.97%. It is widely used in hospitals, laboratories, and other environments where洁净的空气 is critical. HEPA filters are more dense and have a higher resistance to airflow compared to coarse and medium efficiency filters.
4. Ultra Low Penetration Air (ULPA) Filter Cotton：ULPA filter cotton takes filtration to the next level, capturing particles as small as 0.12 microns with an efficiency of 99.999%. It is primarily used in industries like semiconductor manufacturing and aerospace where the tiniest particles can pose significant risks.

By Material

1. Synthetic Fiber Air Filter Cotton：Synthetic fiber filter cotton, typically made from materials like polyester and polypropylene, offers excellent durability and resistance to chemicals. It is cost-effective and widely used in various applications, including HVAC systems and industrial filtration.
2. Glass Fiber Air Filter Cotton：Glass fiber filter cotton is known for its high temperature resistance and superior filtration efficiency. It is commonly used in high-temperature environments such as ovens and industrial furnaces. However, it is more brittle and prone to breakage compared to synthetic fiber filter cotton.
3. Natural Fiber Air Filter Cotton：Natural fiber filter cotton, such as cotton and wool, is biodegradable and environmentally friendly. It is suitable for applications where environmental impact is a concern. However, it has lower filtration efficiency and durability compared to synthetic and glass fiber filter cotton.

By Structure

1. Needle-Punched Aquarium filter media：Needle-punched filter cotton is created by entangling fibers using barbed needles. This process results in a dense and uniform structure, providing good filtration efficiency and mechanical strength. It is commonly used in bag filters and air filtration systems.
2. Spunbond Aquarium filtration media：Spunbond filter cotton is produced by extruding molten polymer through spinnerets to form continuous fibers that are then bonded together. It offers good filtration efficiency and low resistance to airflow, making it suitable for applications where high airflow rates are required.
3. Meltblown Air Filter Media：Meltblown filter cotton is made by extruding melted polymer through tiny nozzles to form ultrafine fibers. This results in a highly porous and dense structure, providing excellent filtration efficiency for small particles. Meltblown filter cotton is widely used in face masks and HEPA filters.