High efficiency air filter material which features?
High levels of air filtration materials include performance of the following aspects: ① high filtration efficiency; ② small flow resistance; ③ large mechanical strength; ④ good uniformity; ⑤ meet waterproof, fireproof, resistant to mold and other special requirements. Worldwide, glass fiber air filter material is still in the high efficiency air filtration market dominated. Comprehensive analysis of advanced glass fiber filter material present in the world, most have the following characteristics.
1More than one component glass fiber structure
In order to improve the filtration performance of the filter material, to change the state of a single component pore glass fiber paper, generally using a variety of different linear density prepared with glass fiber filter paper. As a result of multi-component glass fiber, filter paper prepared not only larvae L-gap rate, and with a reasonable geometry and pore size distribution, can play structure effect and shielding effect of the filter material, and thus high filtration efficiency, low airflow resistance, tensile strength has also been greatly improved.
2 high efficiency, low resistance
In recent years, research and development of high efficiency air filter material rapidly. HEPA filter paper was the most efficient filter paper, the filter paper is now the most efficient ULPA filter paper. ULPA filter paper under 0.12um particle filtration efficiency of up to 99.99999%, the gas flow rate of 0.32L / (cm2 · min) conditions, but also to control the air flow resistance 600Pa or less. It estimated that in the near future, higher efficiency, lower resistance to a new generation of filter material will also be able to develop applications.
3 high mechanical strength
High efficiency air filter material for mechanical strength requirements are high, the difference between vertical and horizontal strength is as small as possible. Filter material giving a sufficient tensile strength and stiffness to improve the stability of the filter material in the production, transportation, storage and use of the process is essential. High-strength filter material folded produced after filtration equipment, to maintain stiffness filter smoke layer to form a good air flow channel, and has a strong impact force, while increasing the effective filtration area, improve and enhance the filtration equipment filtration performance, which has important practical significance. However, glass fiber is very soft, and binding capacity itself is small, and therefore make the glass fiber filter paper having a high mechanical strength requires the use of enhancers.
