Cleanroom Filters: High-Efficiency Air Filtration Technology
Cleanroom filters can be seen as the core equipment for achieving the goal of clean room air purification, playing an irreplaceable key role in maintaining the high cleanliness of the cleanroom.
From the perspective of filtration principle, cleanroom filters rely on various physical mechanisms such as interception, inertial collision, diffusion, and electrostatic attraction to achieve efficient filtration of various particles in the air. When air carrying dust particles passes through the filter, larger particles are directly blocked by the fibers of the filter material; Smaller particles are captured at the moment of collision with fibers due to their own inertia; Due to Brownian motion, extremely small particles continuously diffuse, increasing their chances of contact and adsorption with fibers. In addition, some specially treated filter materials may carry static electricity, greatly improving the adsorption efficiency of particles.
Primary efficiency filter:
Material: Usually made of non-woven fabric, nylon mesh, metal wire mesh and other materials. Among them, non-woven fabric has become a widely used material due to its low cost and certain filtering ability.
Filtration efficiency: mainly responsible for filtering larger particles of dust, hair, fibers, and other impurities. Although its filtration efficiency is relatively limited, it plays a crucial role as the pre filtration component of the entire filtration system. It can remove large particulate pollutants from the air in advance, effectively extending the service life of subsequent high-efficiency filters.
Medium efficiency filter:
Materials: commonly used materials such as glass fiber and synthetic fiber. The fibers of these materials are finer, allowing the medium efficiency filter to capture smaller particles.
Filtration efficiency: mainly filters particles with a diameter of 1~5 μ m, and the colorimetric filtration efficiency ranges from 40% to 95%. Based on this performance, the medium efficiency filter can efficiently intercept larger residual impurity particles in the air, further purify the air, greatly reduce the workload of subsequent high-efficiency filters, and significantly extend the service life of high-efficiency filters.
High Efficiency filter:
Frame material: The frame is generally made of materials such as aluminum alloy, stainless steel, or galvanized steel. The main function of the frame is to firmly support and fix the filter material, ensuring the strength and stability of the overall structure of the filter, while ensuring good sealing between the filter and the installation frame to prevent unfiltered air leakage.
Filter material: Ultra fine glass fiber filter paper is usually used as the core material. This filter paper has outstanding characteristics such as extremely fine fiber diameter, large specific surface area, and high porosity, which can accurately and efficiently capture small particles. For particles with a diameter ≥ 0.3 μ m, the filtration efficiency can easily reach over 99.97%, and in some high-end application scenarios, the filtration efficiency is even higher.
Suzhou Pharma Machinery Co.,Ltd.
2025/11/28
Alice
