As the heart of the air purifier, a lot of knowledge about HEPA has become something consumers are willing to know. What is HEPA made of? What is its purification principle? How should we judge the quality of HEPA? Why do some people say HEPA cannot be washed, while others say it can? Everyone uses HEPA. What are the advantages of the HEPA high-efficiency filter paper used in nano-micro fresh air purifiers compared with others? Let’s find the answer with the editor!
HEPA high-efficiency filter paper Mainly used in automobiles, air purifiers, fresh air systems, and clothing care On air purifiers and other products, their grades are subdivided into: G1-G4, F5-F9, H10-H14 and U15-U17. The H grade is common in air purifiers. HEPA of this specification are all high-efficiency filters.
The higher the HEPA level, the higher the disposable filtration rate, but the higher the level, the greater the wind resistance, the greater the noise, and the more expensive the cost. It is generally recommended that household filter products be of H11 to H12 level. Although H13 has high single-pass filtration efficiency, it has great wind resistance, which affects the air volume of the air purifier. At the same time, it increases the working noise, which is actually unnecessary.
HEPA high-efficiency filter paper is made of polyester (PET) and polytetrafluoroethylene (PTFE) microporous films. PET non-woven material has the characteristics of good tensile strength, good thermal stability and excellent air permeability. The PTFE film is prepared through a special process of biaxial stretching. It has uniform pore size, a porosity of more than 85%, and a non-stick surface. The composite filter paper obtained after combining the two has good stiffness and strength. The composite has good fastness and can be discounted to make filter elements. It is widely used in the filtration of small household appliances such as air conditioning filters and vacuum cleaner filters. Interested parties are welcome to enter the store for consultation and purchase.