公开(公告)号：US20180065094A1

公开(公告)日：2018-03-08

申请号：US15612678

申请日：2017-06-02

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Shinichi CHAEN ,  Hideyuki KIYOTANI ,  Kunihiko INUI ,  Taku YAMANAKA ,  Li BAO ,  Yoshiyuki SHIBUYA ,  Seigo YAMAMOTO ,  Makoto KOBAYASHI ,  Shunji KASAI ,  Hitoshi NIINUMA

IPC: B01D71/36 ,  B01D46/54 ,  B32B27/32 ,  C08L27/18

CPC classification number: B01D71/36 ,  B01D46/0001 ,  B01D46/0019 ,  B01D46/543 ,  B29D7/01 ,  B29D99/005 ,  B29K2027/18 ,  B29K2105/0005 ,  B32B27/322 ,  C08K3/36 ,  C08L27/18 ,  C08L83/04 ,  C08L2205/025 ,  C08L2205/03

Abstract: A mixed powder and a material for molding have polytetrafluoroethylene as a main component. Each includes polytetrafluoroethylene that can be fibrillated, a non-hot melt processable component that is not fibrillated, and a hot melt processable component with a melting point of lower than 320° C. that is not fibrillated. The non-hot melt processable component that is not fibrillated is contained in a range of 20 to 40% by weight of the total weight. The hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of the total weight. A drawn porous body includes a plurality of fibrils, and a plurality of knotted portions that are connected to each other by the fibrils.

公开(公告)号：US20170128876A1

公开(公告)日：2017-05-11

申请号：US15127367

申请日：2015-03-20

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Yoshiyuki SHIBUYA ,  Hideyuki KIYOTANI ,  Kunihiko INUI ,  Li BAO ,  Shinichi CHAEN ,  Seigo YAMAMOTO ,  Makoto KOBAYASHI ,  Hitoshi NIINUMA

IPC: B01D46/54 ,  B01D39/16 ,  B01D46/52

CPC classification number: B01D46/543 ,  B01D39/1623 ,  B01D39/1692 ,  B01D46/521 ,  B01D69/10 ,  B01D71/36 ,  B01D2239/065 ,  B01D2239/0654 ,  B01D2239/10 ,  B01D2239/1216 ,  B01D2275/10 ,  B01D2275/305

Abstract: A filtering medium includes first and second porous membranes mainly composed of fluororesin, and a plurality of air permeable supports to support the first and second membranes. The second membrane is disposed downstream of the first membrane. When air containing polyalphaolefin particles with a count median diameter of 0.25 μm is continuously passed through at a flow rate of 5.3 cm/sec and pressure loss is increased by 250 Pa, the first membrane has a dust retention amount larger than the second membrane. The filtering medium has a pressure loss of less than 200 Pa when air is passed through at a flow rate of 5.3 cm/sec. A collecting efficiency of NaCl particles with a particle diameter of 0.3 μm is 99.97% or more when air containing the NaCl particles is passed through at a flow rate of 5.3 cm/sec. The dust retention amount is 25 g/m2 or more.

公开(公告)号：US20210260516A1

公开(公告)日：2021-08-26

申请号：US17261382

申请日：2019-07-12

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Kunihiko INUI ,  Satoshi HARA ,  Yoshiyuki SHIBUYA ,  Hideyuki KIYOTANI ,  Shinichi CHAEN ,  Seigo YAMAMOTO

IPC: B01D46/52 ,  B01D39/16 ,  B01D63/14 ,  B01D71/36

Abstract: There are provided an air filter medium, a filter pack, and an air filter unit in which the decrease in collection efficiency can be suppressed. The air filter medium includes a fluororesin. The PAO permeability ratio (final permeability/initial permeability) is less than 3.0. The initial permeability is a permeability of polyalphaolefin particles when air containing the polyalphaolefin particles having a number median diameter of 0.25 μm is passed through the air filter medium at a flow velocity of 5.3 cm/s. The final permeability is a permeability of polyalphaolefin particles when air containing the polyalphaolefin particles having a number median diameter of 0.25 μm is continuously passed through the air filter medium at a flow velocity of 5.3 cm/s and the pressure loss is increased by 250 Pa.