公开(公告)号：US20170348626A1

公开(公告)日：2017-12-07

申请号：US15538597

申请日：2015-12-24

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Tatsumi SAKANO ,  Kunihiko INUI ,  Yoshiyuki SHIBUYA

IPC: B01D46/52 ,  D04H3/011 ,  D04H3/007 ,  B32B5/18 ,  B01D69/12 ,  B01D39/16 ,  D04H3/16 ,  B01D71/36 ,  B01D46/00 ,  D04H3/004

CPC classification number: B01D46/521 ,  B01D39/1607 ,  B01D39/1623 ,  B01D39/163 ,  B01D39/1692 ,  B01D46/0001 ,  B01D46/10 ,  B01D69/12 ,  B01D71/36 ,  B01D2239/0622 ,  B01D2239/065 ,  B01D2239/0668 ,  B01D2239/10 ,  B01D2239/1216 ,  B01D2239/1233 ,  B01D2275/10 ,  B01D2279/60 ,  B32B3/26 ,  B32B3/28 ,  B32B5/022 ,  B32B5/024 ,  B32B5/028 ,  B32B5/08 ,  B32B5/18 ,  B32B5/24 ,  B32B5/26 ,  B32B7/02 ,  B32B7/12 ,  B32B15/02 ,  B32B15/14 ,  B32B2250/03 ,  B32B2250/05 ,  B32B2250/20 ,  B32B2250/42 ,  B32B2255/02 ,  B32B2255/26 ,  B32B2262/0238 ,  B32B2262/0253 ,  B32B2262/0261 ,  B32B2262/0269 ,  B32B2262/0276 ,  B32B2262/0284 ,  B32B2262/0292 ,  B32B2262/101 ,  B32B2262/106 ,  B32B2262/12 ,  B32B2262/14 ,  B32B2264/0257 ,  B32B2264/102 ,  B32B2264/104 ,  B32B2264/107 ,  B32B2264/12 ,  B32B2307/30 ,  B32B2307/306 ,  B32B2307/50 ,  B32B2307/51 ,  B32B2307/518 ,  B32B2307/54 ,  B32B2307/714 ,  B32B2307/724 ,  B32B2307/732 ,  B32B2307/734 ,  B32B2435/02 ,  B32B2457/00 ,  B32B2457/14 ,  B32B2509/00 ,  B32B2535/00 ,  D04H3/004 ,  D04H3/007 ,  D04H3/011 ,  D04H3/16

Abstract: A filter medium includes first and second porous films mainly containing fluororesin, and a pre-collection member upstream of the first film. The second film is downstream of the first film. The pre-collection member has a pressure drop when air is passed through at a flow rate of 5.3 cm/s of between 15 Pa and 55 Pa, a collection efficiency of NaCl particles having a particle diameter of 0.3 μm when air containing the particles is passed hrough at a flow rate of 5.3 cm/s of between 25% and 80%, a thickness of 0.4 mm or less, and a PF value between 7 and 15. The PF value={−log((100−collection efficiency (%))/100)}/(pressure drop (Pa)/1000). A ratio of the PF value of the pre-collection member to the PF value when the first and second films are overlapped, is between 0.20 and 0.45. The filter medium can be used in a filter pack or filter unit, and may be produced by integrating the first and second films and the pre-collection member using heat lamination.

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：US20230372849A1

公开(公告)日：2023-11-23

申请号：US18229739

申请日：2023-08-03

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Hideyuki KIYOTANI ,  Kunihiko INUI ,  Nobuki URAOKA ,  Yoshiyuki SHIBUYA

IPC: B01D39/16 ,  B01D69/02 ,  B01D71/36 ,  B01D46/52 ,  B32B27/32 ,  B32B5/02 ,  B32B27/12 ,  C08L27/18 ,  A62B23/02

CPC classification number: B01D39/1692 ,  B01D69/02 ,  B01D71/36 ,  B01D46/521 ,  B32B27/322 ,  B32B5/022 ,  B32B27/12 ,  C08L27/18 ,  A62B23/02 ,  B01D2239/1291 ,  B01D2325/04 ,  B01D2239/10 ,  B32B2571/00 ,  B32B2307/516 ,  B32B2307/518 ,  B32B2262/0284 ,  B32B2262/0253 ,  B32B2262/124 ,  B32B2307/7376

Abstract: An air filter medium includes a fluororesin porous membrane and an air-permeable supporting member stacked on the fluororesin porous membrane. The fluororesin porous membrane has a pressure loss of 80 Pa or less when air is passed at a flow rate of 5.3 cm/s. The fluororesin porous membrane has a PF of 20 or more, the PF being determined from a formula PF={−log((100−collection efficiency (%))/100)}/(pressure loss (Pa)/1000) using the pressure loss and a collection efficiency determined using NaCl particles having a particle size of 0.1 μm. The fluororesin porous membrane has a thickness of 10 μm or more. A dust-holding capacity of polyalphaolefin particles having a number median diameter of 0.25 μm is 15.0 g/m2 or more when air containing the polyalphaolefin particles is continuously passed through the fluororesin porous membrane at a flow rate of 5.3 cm/s and pressure loss increases by 250 Pa.

公开(公告)号：US20190134552A1

公开(公告)日：2019-05-09

申请号：US16235143

申请日：2018-12-28

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Tatsumi SAKANO ,  Kunihiko INUI ,  Yoshiyuki SHIBUYA

IPC: B01D46/52 ,  B32B3/28 ,  D04H3/011 ,  B32B15/14 ,  B32B15/02 ,  B32B7/12 ,  B32B7/02 ,  B32B5/26 ,  B32B5/08 ,  B32B5/02 ,  D04H3/16 ,  B32B5/24 ,  B01D46/10 ,  B01D39/16 ,  B32B5/18 ,  B01D71/36 ,  B01D69/12 ,  B01D46/00 ,  D04H3/004 ,  D04H3/007 ,  B32B3/26

CPC classification number: B01D46/521 ,  B01D39/1607 ,  B01D39/1623 ,  B01D39/163 ,  B01D39/1692 ,  B01D46/0001 ,  B01D46/10 ,  B01D69/12 ,  B01D71/36 ,  B01D2239/0622 ,  B01D2239/065 ,  B01D2239/0668 ,  B01D2239/10 ,  B01D2239/1216 ,  B01D2239/1233 ,  B01D2275/10 ,  B01D2279/60 ,  B32B3/26 ,  B32B3/28 ,  B32B5/022 ,  B32B5/024 ,  B32B5/028 ,  B32B5/08 ,  B32B5/18 ,  B32B5/24 ,  B32B5/26 ,  B32B7/02 ,  B32B7/12 ,  B32B15/02 ,  B32B15/14 ,  B32B2250/03 ,  B32B2250/05 ,  B32B2250/20 ,  B32B2250/42 ,  B32B2255/02 ,  B32B2255/26 ,  B32B2262/0238 ,  B32B2262/0253 ,  B32B2262/0261 ,  B32B2262/0269 ,  B32B2262/0276 ,  B32B2262/0284 ,  B32B2262/0292 ,  B32B2262/101 ,  B32B2262/106 ,  B32B2262/12 ,  B32B2262/14 ,  B32B2264/0257 ,  B32B2264/102 ,  B32B2264/104 ,  B32B2264/107 ,  B32B2264/12 ,  B32B2307/30 ,  B32B2307/306 ,  B32B2307/50 ,  B32B2307/51 ,  B32B2307/518 ,  B32B2307/54 ,  B32B2307/714 ,  B32B2307/724 ,  B32B2307/732 ,  B32B2307/734 ,  B32B2435/02 ,  B32B2457/00 ,  B32B2457/14 ,  B32B2509/00 ,  B32B2535/00 ,  D04H3/004 ,  D04H3/007 ,  D04H3/011 ,  D04H3/16

Abstract: A filter medium includes first and second porous films mainly containing fluororesin, and a pre-collection member upstream of the first film. The pre-collection member has a pressure drop when air is passed through at a flow rate of 5.3 cm/s of between 15 Pa and 55 Pa, a collection efficiency of NaCl particles having a particle diameter of 0.3 μm when air containing the particles is passed through at a flow rate of 5.3 cm/s of between 25% and 80%, a thickness of 0.4 mm or less, and a PF value between 7 and 15. A ratio of the PF value of the pre-collection member to the PF value when the first and second films are overlapped, is between 0.20 and 0.45. The filter medium can be in a filter pack or filter unit, and produced by integrating the films and the pre-collection member using heat lamination.

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：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.

公开(公告)号：US20170002156A1

公开(公告)日：2017-01-05

申请号：US15100013

申请日：2014-12-01

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Shinichi CHAEN ,  Taku YAMANAKA ,  Kohei YASUDA ,  Masahiko YAMADA ,  Nobuki URAOKA ,  Tomohisa KONISHI ,  Kunihiko INUI ,  Yoshiyuki SHIBUYA ,  Makoto ONO

IPC: C08J5/18 ,  B01D67/00 ,  B01D71/52 ,  H01M8/1039 ,  H01M8/1069

CPC classification number: C08J5/18 ,  B01D67/0027 ,  B01D71/36 ,  B01D71/52 ,  B01D71/76 ,  C08J2327/18 ,  H01M8/1023 ,  H01M8/1039 ,  H01M8/1079 ,  H01M2300/0082 ,  Y02P70/56

Abstract: The present invention aims to provide a biaxially stretched porous membrane having high strength, a small pore size, and excellent homogeneity. The biaxially stretched porous membrane of the present invention includes polytetrafluoroethylene obtained by copolymerizing tetrafluoroethylene and perfluoro(methyl vinyl ether).

Abstract translation: 本发明的目的在于提供一种具有高强度，小孔径，均匀性优异的双轴拉伸多孔膜。 本发明的双轴拉伸多孔膜包括通过共聚四氟乙烯和全氟（甲基乙烯基醚）获得的聚四氟乙烯。

公开(公告)号：US20170001155A1

公开(公告)日：2017-01-05

申请号：US15100002

申请日：2014-12-01

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Shinichi CHAEN ,  Taku YAMANAKA ,  Kohei YASUDA ,  Masahiko YAMADA ,  Nobuki URAOKA ,  Tomohisa KONISHI ,  Kunihiko INUI ,  Yoshiyuki SHIBUYA ,  Makoto ONO

IPC: B01D71/36 ,  B01D69/02 ,  H01M8/1039 ,  B01D69/08 ,  C08J5/22 ,  B01J20/26

Abstract: The present invention provides a porous body having high strength, a small pore size, and excellent homogeneity. The porous body of the present invention includes polytetrafluoroethylene and has a microstructure that includes nodes and fibrils. The microstructure further includes, in addition to the nodes and the fibrils, fused points where a fibril that links two nodes and another fibril that links another two nodes are fused with each other.

Abstract translation: 本发明提供一种具有高强度，小孔径，均匀性优异的多孔体。 本发明的多孔体包括聚四氟乙烯并且具有包括节点和原纤维的微结构。 除了节点和原纤维之外，微结构进一步包括熔合点，其中连接两个节点的原纤维和另一个连接另外两个节点的原纤维彼此熔合。

公开(公告)号：US20240091688A1

公开(公告)日：2024-03-21

申请号：US18525085

申请日：2023-11-30

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Hideyuki KIYOTANI ,  Kunihiko INUI

IPC: B01D39/16 ,  B01D46/52 ,  B01D65/06 ,  B01D71/36 ,  B01D71/48

CPC classification number: B01D39/16 ,  B01D46/521 ,  B01D65/06 ,  B01D71/36 ,  B01D71/48

Abstract: An air filter medium includes a fluororesin porous membrane and a supporting member stacked on top of each other. The air filter medium has a permeability ratio (permeability after disinfection treatment/permeability before disinfection treatment) of 5.0 or less, the permeability ratio being a ratio of permeabilities of the air filter media before and after the disinfection treatment of the fluororesin porous membrane as determined using NaCl particles having a particle size of 0.1 μm, and a pressure loss ratio (pressure loss after disinfection treatment/pressure loss before disinfection treatment) of 0.83 or more and 1.15 or less, the pressure loss ratio being a ratio of pressure losses of the air filter media before and after the disinfection treatment of the fluororesin porous membrane.

公开(公告)号：US20210388127A1

公开(公告)日：2021-12-16

申请号：US17312045

申请日：2019-12-06

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Emi KIRITANI ,  Kunihiko INUI ,  Hideyuki KIYOTANI

IPC: C08F14/26 ,  B01D46/52 ,  B01D39/16 ,  B01D39/08

Abstract: A tetrafluoroethylene polymer is provided in an air filter medium having a pressure loss that can be reduced and made uniform at a plurality of positions. The tetrafluoroethylene polymer may also be provided in an air filter medium, a filter pack, or an air filter unit. The tetrafluoroethylene polymer has drawability and non-melt processability. The tetrafluoroethylene polymer has a ratio S2/S1 of 0.60 or more, where S2 represents an endotherm mJ/mg in a range of T0° C. or higher and 350° C. or lower, T0° C. is a temperature 2.5° C. lower than a temperature Tp° C. (340≤Tp≤345) at which a minimum point is given on a heat-of-fusion curve obtained by measuring an unbaked polymer for measurement having no history of heating to a temperature of 300° C. or higher using a differential scanning calorimeter at a temperature-increasing rate of 2° C./min, and S1 represents an endotherm mJ/mg in a range of 320° C. or higher and T0° C. or lower.