公开(公告)号：US20220410525A1

公开(公告)日：2022-12-29

申请号：US17620741

申请日：2020-03-16

申请人： JNC CORPORATION ,  JNC FIBERS CORPORATION

发明人： Takayuki HATTORI ,  Hidemi ITO

IPC分类号： B32B5/26 ,  B32B5/02 ,  B32B5/18 ,  B32B5/24 ,  G10K11/168

摘要： A sound-absorbing material has an excellent sound absorbing property in a low-frequency range, an intermediate-frequency range, and a high-frequency range. The sound-absorbing material is a laminated sound-absorbing material, which includes at least one first layer, and at least one second layer that differs from the first layer. The first layer has a mean flow pore diameter of 2.0 to 60 μm and an air permeability according to the Frazier method of 30 to 200 cc/cm2·s. The second layer is a layer including at least one kind selected from a foamed resin, a nonwoven fabric and a woven fabric, has a thickness of 3 to 40 mm, and has a density that is lower than the first layer and is 51 to 150 kg/m3. The first layer is disposed on a sound incidence side of the second layer.

公开(公告)号：US20220176283A1

公开(公告)日：2022-06-09

申请号：US17598291

申请日：2020-03-11

申请人： JNC CORPORATION ,  JNC FIBERS CORPORATION

发明人： You UMEBAYASHI ,  Shimpei HIRAMOTO ,  Hidemi ITO

IPC分类号： B01D39/16 ,  D01D5/00 ,  D04H1/728 ,  D04H1/413 ,  D04H1/4382 ,  D04H1/4318 ,  D01F6/12

摘要： Provided are: a filter medium with high dust collection efficiency, low pressure loss, and a long lifespan; and a filter material used for the filter medium. This composite structure includes ultrafine fibers having a fiber diameter of less than 500 nm, and beads. The outermost surface of the composite structure has at least 500/mm2 of beads with a diameter of 5 μm or more. The ultrafine fibers and the beads preferably have the same component.

公开(公告)号：US20210094258A1

公开(公告)日：2021-04-01

申请号：US16978712

申请日：2019-02-26

申请人： JNC CORPORATION ,  JNC FIBERS CORPORATION

发明人： Takayuki HATTORI ,  Hidemi ITO

IPC分类号： B32B5/26 ,  G10K11/168 ,  B32B27/02

摘要： A laminated acoustic absorption member that includes at least a first fiber layer and a second fiber layer, as well as at least one substrate layer present between the first fiber layer and the second fiber layer, wherein: the first fiber layer has an average flow pore diameter of 0.5-10 μm and a basis weight of 0.1-200 g/m2; the second fiber layer has an average flow pore diameter of 0.5-10 μm, the average flow pore diameter of the second fiber layer being equal to or less than that of the first fiber layer, and also has a basis weight of 0.1-200 g/m2; the substrate layer has an air permeability of 40 cc/cm2·s or greater as measured by the Frazier method, and a basis weight of 1-700 g/m2; and the first fiber layer and the second fiber layer are disposed on a sound-incidence side and a sound-transmission side, respectively.

公开(公告)号：US20220165243A1

公开(公告)日：2022-05-26

申请号：US17441697

申请日：2019-09-05

申请人： JNC CORPORATION ,  JNC FIBERS CORPORATION

发明人： Takayuki HATTORI ,  Hidemi ITO

IPC分类号： G10K11/168 ,  B32B7/02 ,  B32B5/26 ,  B32B5/24

摘要： The present invention addresses the problem of providing a sound absorbing material which exhibits excellent sound absorbing performance in low-frequency and intermediate-frequency ranges, and preferably also in higher-frequency ranges. This laminated sound absorbing material includes at least: a fiber layer; and a porous layer, wherein the fiber layer has a mean flow pore size of 1.0-60 μm and an air permeability as measured with a Frazier method of 30-220 cc/cm2·s, and the porous layer comprises at least one selected from the group consisting of foamed resins, unwoven fabrics, and woven fabrics, has a thickness of 3-40 mm and a density of 3-50 kg/m3 which is lower than that of the fiber layer, and is disposed such that the fiber layer is on a sound incidence side.

公开(公告)号：US20210245469A1

公开(公告)日：2021-08-12

申请号：US17054769

申请日：2019-07-24

申请人： JNC CORPORATION ,  JNC FIBERS CORPORATION

发明人： Takayuki HATTORI ,  Hidemi ITO

IPC分类号： B32B5/02 ,  B32B5/18 ,  B32B3/12 ,  B32B5/26 ,  B32B27/32 ,  B32B27/12 ,  G10K11/168

摘要： A laminate sound-absorbing material that includes a porous layer and a base material layer. The porous layer is a fiber layer or comprises a microporous film. The mean flow pore diameter of the porous layer is 0.1-30 μm. The basis weight of the porous layer is 0.1-200 g/m2. The average sound transmission loss of the base material layer between 1,000 Hz and 12,500 Hz is at least 2 dB. The base material layer is arranged on a sound incidence side, and the porous layer is arranged on a sound transmission side.