About Hepa Filter Media

Does the Hepa high - efficiency Air Filter Material use glass fiber or melt - blown composite filter material? What is the difference between the two? Is it better to use melt - blown or glass fiber for household Air Filter Media?

Glass fiber air filter: a HEPA Filter Media made of glass material through high temperature melting, wire drawing and other processes. Each bundle of fiber strands is composed of hundreds or even thousands of monofilaments, with uniform pore size distribution, flame retardant, and high filtration accuracy, which can reach H14 level ( filtration efficiency 99.995 % @ 0.3 um ).

Composite Non Woven Fabric: refers to the combination of meltblown + PET Non Woven Fabric, high - efficiency filter meltblown filter paper + pet substrate with good stiffness, the overall filter material is resistant to wind pressure after folding, not easy to be damaged, and can also reach H14 grade ( filtration efficiency 99.995 % ) @ ① 0.3 um).

Since the filtration efficiency can reach the H14 level, what is the difference between the two? How should we choose when designing the filter? Below, we will analyze it from three aspects:

Material strength: The material of glass fiber is relatively brittle, with poor wear resistance and easy to break. Therefore, when making a glass fiber air filter, due to its "fragility", we have to make a metal protective net at the air inlet and outlet, which will increase the cost and increase the unit price.
Filter resistance: the same size and the same grade of filter, the resistance of the glass fiber filter is much higher than that of the meltblown composite Hepa Filter Material .
Filtration efficiency: They are both high - efficiency filters, and the filtration efficiency can reach H 13 - H 14. However, compared with meltblown, the filtration efficiency of glass fiber will not be greatly attenuated in the later stage, and after a period of use of meltblown, the filtration efficiency may be at risk of attenuation.
To sum up:Melt Blown Nonwoven fabric is more suitable for civilian use, with similar filtration efficiency, and glass fiber is lower and more energy - saving. In a disguised form, the cost of use is reduced. The car is soft and not easy to be damaged, and the price is also cheaper than glass fiber. The more stable filtration efficiency of glass fiber high - efficiency filters is suitable for industrial use, such as clean rooms and dust - free workshops that require high air quality. It is worth mentioning that glass fiber is not suitable for cylindrical filters, and the rubber strip is easy to break during the circle process, but if the rubber strip is not applied, the wind and the path will be uneven.