合成纤维和玻璃纤维制成的Ashrae过滤介质的性能比较

对常用的超细玻璃纤维制成的Ashrae袋式过滤介质、标准驻极熔喷聚丙烯Ashrae袋式过滤介质和一种新型的熔喷聚丙烯细纤维Ashrae袋式过滤介质进行了比较。标准玻璃纤维毡所用的纤维非常微细,密实性(固体体积分数)很低,导致α值(品质因子)较高,但该材料不能吸附静电荷。标准熔喷聚丙烯过滤介质所用的纤维比玻璃纤维粗得多,密实性也更高,因能吸附很多静电荷,其初始α值比玻璃纤维毡要大得多,但放电后的α值却比玻璃纤维毡低得多。新型的熔喷聚丙烯细纤维过滤介质可完全驻极,其初始α值和标准熔喷聚丙烯过滤介质一样高,但由于更加细微的纤维结构,在放电后所保持的α值更高。

A comparison of the performance of synthetic and glass Ashrae filtration media

This paper undertakes a comparison of conventional microglass mat Ashrae bag filtration media, conventional charged meltblown polypropylene Ashrae bag filtration media, and a new charged fine fiber meltblown polypropylene Ashrae bag filtration media. Conventional glass mat has very fine fibers and an extremely low solidity (solid volume fraction), which results in a moderately high alpha value. However, it is incapable of accepting an electrostatic charge. Conventional meltblown polypropylene filtration media has considerably larger fibers than does glass mat media, and also has a higher solidity. Because it is capable of accepting a very high electrostatic charge it has a significantly higher initial alpha (quality factor) than does glass mat. However, after discharge the alpha value is significantly lower than for glass mat. A new fine fibered meltblown polypropylene filtration media has a fully charged initial alpha as high as conventional meltblown polypropylene, but because of its finer fiber structure it retains a higher alpha value after discharge.