Air filter medium, filter pleat pack, and air filter unit
AssigneeNitto Denko Corporation
InventorsGo SATO, Noriaki HARADA, Shunsuke MASAKI
Life of this patent
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Abstract
An air filter medium including a porous fluorine resin membrane, the air filter medium further including a glass filter medium layer, wherein the glass filter medium layer and the porous fluorine resin membrane are placed in this order from upstream to downstream of the air filter medium configured to allow airflow to pass through the air filter medium. The porous fluorine resin membrane includes a plurality of nodes and a plurality of fibrils, and in an area distribution of the nodes, when an area of the node corresponding to a cumulative relative frequency of 95% from a smaller area is defined as S95, the porous fluorine resin membrane satisfies 2.0 μm2≤S95≤8.0 μm2.
Claims12
An air filter medium comprising a porous fluorine resin membrane, the air filter medium further comprising a glass filter medium layer, wherein
- the glass filter medium layer and the porous fluorine resin membrane are placed in this order from upstream to downstream of the air filter medium configured to allow airflow to pass through the air filter medium,
- the porous fluorine resin membrane includes a plurality of nodes and a plurality of fibrils, and in an area distribution of the nodes, when an area of the node corresponding to a cumulative relative frequency of 95% from a smaller area is defined as S95, the porous fluorine resin membrane satisfies 2.0 m2≤S95≤8.0 m2.
Dependencies are inferred from the claim text.