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    Sound insulating material for vehicle
    1.
    发明授权
    Sound insulating material for vehicle 有权

    公开(公告)号：US11872944B2

    公开(公告)日：2024-01-16

    申请号：US17267138

    申请日：2018-09-25

    Applicant: KOTOBUKIYA FRONTE CO., LTD.

    Inventor： Kazuki Fukui

    IPC: B60R13/08 ,  B32B3/12 ,  B32B7/12 ,  B32B27/06 ,  B32B27/32 ,  G10K11/168

    CPC classification number: B60R13/0815 ,  B32B3/12 ,  B32B7/12 ,  B32B27/06 ,  B32B27/32 ,  G10K11/168 ,  B32B2307/102 ,  B32B2605/00

    Abstract: There is provided a sound-insulation material for a vehicle that can reduce the weight thereof and exhibit sufficient sound insulation performance against noise of 500 Hz to 6400 Hz generated in vehicles. The sound-insulation material for a vehicle, of the present invention, includes: a core layer having tubular cells, the tubular cells being arranged in a plurality of rows; an airflow-blocking resin film layer provided on one surface of the core layer; and a decoupling layer provided on the airflow-blocking resin film layer; and an average (P/v)/Za is 2.8 to 10 between 500 and 6400 Hz, where: P and v are respectively a sound pressure and a particle velocity on a surface of the airflow-blocking resin film layer provided on the core layer, the surface being opposite to the core layer; and Za is an acoustic impedance of the decoupling layer.

    LAMINATED HOLLOW FORMED BODY
    4.
    发明公开
    LAMINATED HOLLOW FORMED BODY 审中-公开

    公开(公告)号：US20240336028A1

    公开(公告)日：2024-10-10

    申请号：US18294826

    申请日：2022-08-02

    Applicant: KOTOBUKIYA FRONTE CO., LTD. ,  MT-TEC LLC

    Inventor： Masayuki OTOBE

    IPC: B32B3/12 ,  B32B5/26 ,  B32B27/12 ,  B32B27/32

    CPC classification number: B32B3/12 ,  B32B5/265 ,  B32B27/12 ,  B32B27/32 ,  B32B2305/20 ,  B32B2307/7376

    Abstract: Provided is a laminated hollow formed body in which the generation of strange noises such as crunching is restrained even when hot press forming is performed on the laminated hollow formed body including a core layer with double standing walls and a plurality of regions different in height of the core layer is included. A laminated hollow formed body includes a core layer (10) that is made of resin and that is sandwiched between a front material layer (40) and a back material layer (50), the core layer (10) is a core layer in which hollow cells (20) having a tubular shape are disposed along a plurality of rows, a double standing wall (24) is constituted by cell standing walls (23a, 23b) of two adjacent hollow cells (20), two cell standing walls (23a, 23b) extend from a first end portion (27) contacting the front material layer (40) to a second end portion (28) contacting the back material layer (50) in the same direction as each other, in a double standing wall (24P) of a core layer (10P) at a region where hot press forming has been performed to the laminated hollow formed body, and at least one of the first end portion (27) and the second end portion (28) is a lump portion (26) made of the two cell standing walls integrally melted.

    Noise insulation material for automobile
    5.
    发明授权
    Noise insulation material for automobile 有权

    公开(公告)号：US11881198B2

    公开(公告)日：2024-01-23

    申请号：US17270105

    申请日：2019-01-22

    Applicant: KOTOBUKIYA FRONTE CO., LTD.

    Inventor： Kazuki Fukui ,  Nobuyuki Takahashi

    IPC: G10K11/168 ,  B60R13/08

    CPC classification number: G10K11/168 ,  B60R13/0815 ,  B60R13/0838

    Abstract: A sound-insulation material for a vehicle has high rigidity and is capable of exhibiting sufficient sound insulation performance against noise having a frequency of 500 Hz to 5000 Hz generated in a vehicle, while maintaining low weight. The sound-insulation material for a vehicle of the present invention has a multilayer structure, the material including: a hard layer having tubular cells, the tubular cells being arranged in a plurality of rows; and a soft layer provided on one surface of the hard layer, in which a ratio of a dynamic spring constant Kd to a static spring constant Ks, of a structure having the hard layer and the soft layer, is 0

    Automobile Component
    8.
    发明公开
    Automobile Component 审中-公开

    公开(公告)号：US20230373409A1

    公开(公告)日：2023-11-23

    申请号：US18229786

    申请日：2023-08-03

    Applicant: KOTOBUKIYA FRONTE CO., LTD.

    Inventor： Tetsuya Masumura ,  Yuki Miyata

    IPC: B60R13/08 ,  B32B3/12 ,  B32B3/26 ,  B32B27/12

    CPC classification number: B60R13/0815 ,  B32B3/12 ,  B32B3/266 ,  B32B27/12 ,  B32B2307/10 ,  B32B2605/003 ,  Y10T428/24149 ,  B60R13/08

    Abstract: There is provided an automobile component capable of improving sound absorption performance by damping due to vibration of a thin film as well as reducing weight of the automobile component. An automobile component of the present invention includes a core layer 10 in which tubular cells 20 are arranged in a plurality of rows, and a nonwoven fabric layer 30 on one or both surfaces of the core layer. The cells have closed surfaces 21 and open ends 22 in every other row as cell ends on one surface of the core layer. As cell ends on the other surface of the core layer, the cells have open ends 22 in the rows where the cells have the closed surfaces as cell ends on the one surface, and have closed surfaces 21 in the rows where the cells have the open ends as cell ends on the one surface. The open ends 22 allow the internal space of the cells 20 to be in communication with the outside. A thin resin film layer 40 having a plurality of apertures is provided between the core layer and the nonwoven fabric layer. A ratio S is set so that 0

    Automobile component
    10.
    发明授权
    Automobile component 有权

    公开(公告)号：US11794670B2

    公开(公告)日：2023-10-24

    申请号：US17040129

    申请日：2018-03-29

    Applicant: KOTOBUKIYA FRONTE CO., LTD.

    Inventor： Tetsuya Masumura ,  Yuki Miyata

    IPC: B60R13/08 ,  B32B3/12 ,  B32B3/26 ,  B32B27/12

    CPC classification number: B60R13/0815 ,  B32B3/12 ,  B32B3/266 ,  B32B27/12 ,  B32B2307/10 ,  B32B2605/003 ,  B60R13/08 ,  Y10T428/24149

    Abstract: There is provided an automobile component capable of improving sound absorption performance by damping due to vibration of a thin film as well as reducing weight of the automobile component. An automobile component of the present invention includes a core layer 10 in which tubular cells 20 are arranged in a plurality of rows, and a nonwoven fabric layer 30 on one or both surfaces of the core layer. The cells have closed surfaces 21 and open ends 22 in every other row as cell ends on one surface of the core layer. As cell ends on the other surface of the core layer, the cells have open ends 22 in the rows where the cells have the closed surfaces as cell ends on the one surface, and have closed surfaces 21 in the rows where the cells have the open ends as cell ends on the one surface. The open ends 22 allow the internal space of the cells 20 to be in communication with the outside. A thin resin film layer 40 having a plurality of apertures is provided between the core layer and the nonwoven fabric layer. A ratio S is set so that 0

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