公开(公告)号：US10537836B2

公开(公告)日：2020-01-21

申请号：US16084127

申请日：2017-03-08

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Tatsumi Sakano ,  Kunihiko Inui ,  Yoshiyuki Shibuya ,  Hideyuki Kiyotani

IPC: B01D53/22 ,  B01D39/16 ,  B01D46/10 ,  B01D39/20 ,  B01D71/36 ,  B01D63/14

Abstract: A filter medium for an air filter includes a pre-collection member, a first porous film, and a second porous film arranged in order from the side that is upstream of the air current. Each of the first porous film and the second porous film has a pressure loss of 30 Pa or more and 90 Pa or less when air is passed through each porous film at a flow rate of 5.3 cm/s, and has a collection efficiency of 95% or more and 99.9% or less for NaCl particles having a particle diameter of 0.3 μm when air containing the NaCl particles is passed through each of the porous films at a flow rate of 5.3 cm/s. The pre-collection member has a pressure loss of 5 Pa or more and less than 55 Pa when air is passed through the pre-collection member at a flow rate of 5.3 cm/s, has a collection efficiency of 15% or more and less than 85% for NaCl particles having a particle diameter of 0.3 μm when air containing the NaCl particles is passed through the pre-collection member at a flow rate of 5.3 cm/s, and has a thickness of more than 0.4 mm.

公开(公告)号：US10265661B2

公开(公告)日：2019-04-23

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: B01D53/22 ,  B01D71/36 ,  B32B27/32 ,  C08L27/18 ,  B01D46/00 ,  B01D46/54 ,  B29D7/01 ,  B29D99/00 ,  C08K3/36 ,  C08L83/04 ,  B29K27/18 ,  B29K105/00

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：US09707504B2

公开(公告)日：2017-07-18

申请号：US14394946

申请日：2013-04-19

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: B01D53/22 ,  B01D46/54 ,  B32B27/32 ,  C08L27/18 ,  B01D46/00 ,  B29D7/01 ,  B29D99/00 ,  B01D71/36 ,  B29K27/18 ,  B29K105/00

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 composition, 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 hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of a total weight. A filtering medium for an air filter includes a porous membrane made of these components, and an air permeable support. The porous membrane is manufactured, by mixing these components, extruding the mixture, rolling and drawing.

公开(公告)号：US10265654B2

公开(公告)日：2019-04-23

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: B01D53/22 ,  B01D46/54 ,  B01D69/10 ,  B01D39/16 ,  B01D46/52 ,  B01D71/36

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：US12152093B2

公开(公告)日：2024-11-26

申请号：US17312045

申请日：2019-12-06

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Emi Kiritani ,  Kunihiko Inui ,  Hideyuki Kiyotani

IPC: B01D39/00 ,  B01D39/08 ,  B01D39/16 ,  B01D46/52 ,  C08F14/26

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.

公开(公告)号：US20150082757A1

公开(公告)日：2015-03-26

申请号：US14394946

申请日：2013-04-19

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: B01D46/54 ,  B29D99/00 ,  B29D7/01 ,  B01D46/00 ,  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 composition, a mixed power 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 hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of a total weight. A filtering medium for an air filter includes a porous membrane made of these components, and an air permeable support. The porous membrane is manufactured, by mixing these components, extruding the mixture, rolling and drawing.

Abstract translation: 组合物，混合动力和用于模塑的材料具有聚四氟乙烯作为主要成分。 每个都包括可以被原纤化的聚四氟乙烯，不原纤化的非热熔可加工组分，以及熔点低于320℃，不原纤化的热熔加工组分。 热熔可加工成分的含量为0.1重量％以上且小于20重量％。 用于空气过滤器的过滤介质包括由这些部件制成的多孔膜和透气性支撑体。 通过混合这些组分制造多孔膜，挤出混合物，轧制和拉伸。