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Compared with paper filter media fibres, the diameter heigh efficiency media fibre is thinner which results in a more uniform pore size.
Therefore, filtration ratio improves vastly .
Moreover, since the void ratio is high, filtration resistance is low and the dust holding capacity increases.
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The diameter of a fibre of Paper filter media has an average 25 micrometers.
In order to make the filtration ratio higher, paper production must be carried out more finely, but since the diameter of paper fibres is thick compared to high efficiency filter media, there is a limit.
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