Air filter medium and air filter product
AssigneeDaikin Industries, Ltd.
InventorsSatoshi Hara, Hiroaki Shintani, Yoshitaka Ito
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Abstract
A method of producing an air filter includes a first step of preparing a tow band and a second step of obtaining a filter medium layer that includes first fibers obtained by applying tension to the tow band to spread the tow band and the first fibers having an average fiber diameter of 5 μm or more and 50 μm or less and second fibers disposed in gaps between the first fibers and having an average fiber diameter of 30 nm or more and 1 μm or less. The second fibers are drawn out from the particulate resin by drawing the particulate resin, and the particulate resin is drawn by separating the first fibers from each other so that a gap is formed between the first fibers during the spreading of the tow band.
Claims20
A method of producing an air filter medium, the method comprising:
- a first step of preparing a tow band obtained by crimping a tow formed by combining a plurality of filaments, a particulate resin being adhered to the tow band and
- a second step of obtaining a filter medium layer that includes
- first fibers obtained by applying tension to the tow band to spread the tow band and the first fibers having an average fiber diameter of 5 μm or more and 50 μm or less, and
- second fibers disposed in gaps between the first fibers and having an average fiber diameter of 30 nm or more and 1 μm or less,
- wherein
- the second fibers are drawn out from the particulate resin by drawing the particulate resin, and
- the particulate resin is drawn by separating the first fibers from each other so that a gap is formed between the first fibers during the spreading of the tow band.
Dependencies are inferred from the claim text.