公开(公告)号：US20220100934A1

公开(公告)日：2022-03-31

申请号：US17480996

申请日：2021-09-21

Applicant: MAZDA MOTOR CORPORATION ,  KOGAKUIN UNIVERSITY

Inventor： Daiji KATSURA ,  Keisuke YAMAKAWA ,  Takashi YAMAMOTO

IPC: G06F30/28 ,  G01N29/44 ,  G10K11/162

Abstract: A method of designing an internal structure of a foamed resin sound absorbing material includes: setting a microscopic structure model with a structure equivalent to the internal structure of the foamed resin sound absorbing material; calculating an acoustic characteristic by homogenization for each of a plurality of microscopic structure models, each being the microscopic structure model; identifying a relational expression between a Biot's parameter of the foamed resin sound absorbing material and the microscopic structure model; setting a target acoustic characteristic; identifying a Biot's parameter for achieving the target acoustic characteristic set, by Biot's modeling; and identifying a microscopic structure model corresponding to the Biot's parameter identified.

公开(公告)号：US20220283102A1

公开(公告)日：2022-09-08

申请号：US17585822

申请日：2022-01-27

Applicant: MAZDA MOTOR CORPORATION

Inventor： Mitsuyoshi KAWABE ,  Daiji KATSURA ,  Tetsuya MAEDA

IPC: G01N23/046

Abstract: A structure analysis method includes impregnating a resin material with a radiosensitizer. The resin material contains thermoplastic resin. The radiosensitizer contains a solvent and a radiosensitizing molecule that contains, as a heavy element, an element with an atomic number equal to or greater than that of fluorine. A relative energy difference (RED1) represented by Ra1/R01 is 1.8 or less in a case where R01 is the interaction radius of the thermoplastic resin in a Hansen space and Ra1 is a distance between the Hansen solubility parameters of the thermoplastic resin and the solvent.

公开(公告)号：US20180277088A1

公开(公告)日：2018-09-27

申请号：US15763078

申请日：2017-03-27

Applicant: MAZDA MOTOR CORPORATION

Inventor： Daiji KATSURA

IPC: G10K11/168 ,  D04H1/46 ,  D06M23/10 ,  D06M15/564 ,  D04H1/435 ,  D04H1/4218 ,  C03C25/326

Abstract: A sound absorbing material includes a fiber group of inorganic fibers, a fiber group of organic fibers, or a fiber group of a fiber blend including the inorganic and organic fibers. In the fiber group, at least junctions between the fibers are coated with a polymeric coating film having a loss factor of 0.1 or more.

公开(公告)号：US20200368996A1

公开(公告)日：2020-11-26

申请号：US16498337

申请日：2018-02-16

Applicant: MAZDA MOTOR CORPORATION

Inventor： Daiji KATSURA

IPC: B32B5/02 ,  B32B5/18

Abstract: Provided is a functional laminate including a porous intermediate layer having air permeability laminated between a porous surface layer and a resin foamed layer, the porous intermediate layer having an average void ratio smaller than that of the porous surface layer.

公开(公告)号：US20200023610A1

公开(公告)日：2020-01-23

申请号：US16498335

申请日：2018-02-16

Applicant: MAZDA MOTOR CORPORATION

Inventor： Daiji KATSURA

IPC: B32B5/24 ,  B32B5/26 ,  B32B5/02 ,  B32B7/02 ,  B32B37/02 ,  B32B37/15

Abstract: Provided is a functional laminate including a porous intermediate layer having air permeability laminated between a porous surface layer and a resin foamed layer, the porous intermediate layer having an affinity to a foaming resin forming the resin foamed layer.