I believe many people have heard of the air filter, which plays a pivotal role in air purification. In the air filter, there is a glass fiber air filter material. Do you know any characteristics?
Air filter materials mainly include the following properties: ① high filtration efficiency; ② small airflow resistance; ③ high mechanical strength; ④ good uniformity; ⑤ meet special requirements such as waterproof, fireproof and mildew resistance.
Worldwide, glass fiber air filtration materials still dominate the high-efficiency air filtration market. Comprehensive analysis of the current advanced glass fiber filter materials in the world, most of them have the following characteristics.
1.The structure of multi-component glass fiber
In order to improve the filtering performance of the filter material and change the pore state of the single-component glass fiber paper, a variety of glass fibers with different linear densities are generally used to prepare the filter paper. Due to the use of multi-component glass fibers, the prepared filter paper not only has a high L-gap ratio, but also has a reasonable geometric structure and pore size distribution. It can play the structural effect and shielding effect of the filter material, so the filtration efficiency is high and the airflow resistance is low. The tensile strength has also been greatly improved.
2.High efficiency and low resistance
In recent years, research and development of high-efficiency air filter materials in Chengdu and Xi'an has been rapid. HEPA filter paper was once the most efficient filter paper, and now ULPA filter paper is the most efficient filter paper. The filtration efficiency of ULPA filter paper for 0.12um particles can reach 99.99999%. Under the condition of airflow rate of 0.32L / (cm2? Min), the airflow resistance is also controlled below 600Pa. It is estimated that in the near future, a new generation of filter materials with higher efficiency and lower resistance will also be developed and applied.
3.Higher mechanical strength
Chengdu Xi'an high-efficiency air filter material has high requirements for mechanical strength, and the smaller the difference in vertical and horizontal strength is, the better. Enabling the filter material with sufficient tensile strength and stiffness is very necessary to improve the stability of the filter material during production, transportation, storage and use. The filter equipment made of high-strength filter material after folding can maintain the stiffness of the filter layer to form a good airflow channel, and has strong impact resistance. At the same time, it increases the effective filtering area and improves and improves the filter equipment. Filtration performance has important practical significance. However, glass fiber is very soft, and the binding force itself is very small. Therefore, in order to make the glass fiber filter paper have high mechanical strength, a reinforcing agent is needed.
4.Good process performance
In order to increase the effective filtering area of the filter material and reduce the airflow resistance, the filter material is generally folded into a corrugated shape and used. Therefore, the filter material must have good process performance, that is, good flexibility and high folding resistance. Filter materials with poor process performance are often easily damaged once folded, resulting in lower product qualification rates, lower work efficiency, and increased costs, while affecting the overall performance of the filter.
5.Special properties such as waterproof, fireproof and mildew resistance
In some special occasions, such as military and nuclear industries, filter materials should also have special properties such as waterproof, fireproof, and mildew resistance. Otherwise, under humid, high temperature or open flame conditions, the structure of the filter material will be damaged, seriously affecting or even losing its filtering performance, or becoming a "breeding ground" for bacteria such as mold. Therefore, it gives the filter material good waterproof and fire resistance , Mold resistance and other properties are very important.
Glass fiber air filter material has the above five characteristics. Because of its characteristics, it is widely used and is very popular in the market.
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