公开(公告)号：US20250084567A1

公开(公告)日：2025-03-13

申请号：US18955301

申请日：2024-11-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Ryosuke EBINA ,  Kenichiro TAKUMI ,  Tsuyoshi SOEDA ,  Masayuki TSUJI

IPC: D02G3/26

Abstract: A yarn that contains at least one potential-generating filament constructed to generate an electric potential in response to energy from the outside of the at least one potential-generating filament, the yarn having a total linear density of 90 dtex or more.

公开(公告)号：US20230041282A1

公开(公告)日：2023-02-09

申请号：US17974715

申请日：2022-10-27

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Masayoshi TAKAGI ,  Daiji TAMAKURA ,  Kenichiro TAKUMI ,  Ryosuke EBINA ,  Koji TAKESHITA

IPC: A41D13/11 ,  A61L9/22

Abstract: A mask for covering at least a nostril and a mouth of a wearer. The mask includes a main body portion and an ear hooking portion attached to the main body portion. At least a part of the main body portion has a sheet-like piezoelectric portion, and the piezoelectric portion includes a yarn formed of an electric field forming filament.

公开(公告)号：US20230250562A1

公开(公告)日：2023-08-10

申请号：US18087144

申请日：2022-12-22

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenichiro TAKUMI ,  Ryosuke EBINA ,  Tsuyoshi SOEDA ,  Masayuki TSUJI

IPC: D03D15/47 ,  D03D15/40 ,  D03D15/56 ,  D03D15/533

CPC classification number: D03D15/47 ,  D03D15/56 ,  D03D15/497 ,  D03D15/533 ,  D10B2401/18 ,  D10B2501/02 ,  D10B2501/043

Abstract: A knitted fabric structure that includes a piezoelectric yarn having a piezoelectric material that produces a surface potential by input of an external force from an outside of the piezoelectric yarn; and an elastic yarn having stretchability knitted together with the piezoelectric yarn, wherein the piezoelectric yarn has a mixing ratio of 5% or more based on a whole of the knitted fabric structure.

公开(公告)号：US20230243076A1

公开(公告)日：2023-08-03

申请号：US18173103

申请日：2023-02-23

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Ryosuke EBINA ,  Shuichi NAKANISHI ,  Kenichiro TAKUMI ,  Mei WATANABE ,  Masayuki TSUJI

IPC: D04B39/00

CPC classification number: D04B39/00 ,  D10B2331/04 ,  D10B2401/061 ,  D10B2401/13 ,  D10B2401/16

Abstract: A fabric that includes a loop of a yarn including a voltage generating filament. The fabric has a value of X of 1,000 or more, where X=(A+B)×C×D×E, and wherein: A is a loop angle of the loop of the yarn when the fabric is stretched by 10%, B is a connection angle of the loop of the yarn when the fabric is stretched by 10%, C is a number of the loops of the yarn per 1 cm2 of the fabric, D is a force (N) applied per basis weight (g/m2) of the fabric, and E is a surface potential (V) of the yarn.

公开(公告)号：US20230085519A1

公开(公告)日：2023-03-16

申请号：US18056433

申请日：2022-11-17

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yusuke MORITA ,  Koki YOKOTA ,  Kenichiro TAKUMI ,  Shuichi NAKANISHI ,  Masayuki TSUJI

IPC: D04H1/728 ,  D04H1/74 ,  D01D5/00 ,  D01D5/084 ,  D04H1/4382 ,  D04H1/435

Abstract: A method for producing a sheet having nanofibers that contain a piezoelectric polymer material. The method including dissolving a piezoelectric polymer material into a solvent so as to prepare a spinning solution; preheating a target board before nanofibers are formed by electrospinning the spinning solution; and, after the heating of the target board, receiving the nanofibers formed by electrospinning onto the heated target board so as to form the nanofibers into a sheet on the heated target board.

公开(公告)号：US20220267934A1

公开(公告)日：2022-08-25

申请号：US17653000

申请日：2022-03-01

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenichiro TAKUMI ,  Masayuki TSUJI ,  Eiji TAGUCHI ,  Tomoharu KIDOU

IPC: D02G3/26 ,  D02G3/04

Abstract: A spun yarn that includes at least a first short fiber that is a piezoelectric fiber that generates a potential by applied external energy, and that has a length of 800 mm or less. The spun yarn preferably includes a plurality of short fibers that are twisted together with each other.

公开(公告)号：US20240001269A1

公开(公告)日：2024-01-04

申请号：US18467399

申请日：2023-09-14

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takafumi INOUE ,  Kenichiro TAKUMI ,  Daiji TAMAKURA ,  Masamichi ANDO

IPC: B01D39/08 ,  D02G3/44 ,  H10N30/00

CPC classification number: B01D39/08 ,  D02G3/449 ,  H10N30/1061 ,  D10B2401/13 ,  D10B2401/16

Abstract: An antibacterial mask that includes a filter portion having a first layer and a second layer, wherein the first layer includes a plurality of first piezoelectric yarns that generate at least a first charge by stretching, and the second layer is formed of an ordinary cloth and positioned on a user side of the antibacterial mask.

公开(公告)号：US20230078324A1

公开(公告)日：2023-03-16

申请号：US17982720

申请日：2022-11-08

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Masayoshi TAKAGI ,  Kenichiro TAKUMI ,  Kanako ANDO ,  Masayuki TSUJI ,  Ryosuke EBINA

IPC: A41D13/11 ,  H01L41/18

Abstract: A mask that exhibits a more improved antibacterial effect by more efficiently expanding and contracting a body of the mask in the periphery of the nose and mouth area of the mask without using a drug such as an antibacterial agent and/or an antiviral agent. The mask includes: a body including a yarn having a potential generating filament; and at least one dart that extends from an edge portion of the body towards a central portion of the body.

公开(公告)号：US20220410174A1

公开(公告)日：2022-12-29

申请号：US17895448

申请日：2022-08-25

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenichiro TAKUMI ,  Ryo TODO

IPC: B03C3/45 ,  D02G3/02 ,  D02G3/44

Abstract: A yarn containing a potential-generating filament. The yarn is constructed such that a positive or negative surface electrical potential is generated by applying an external force to the yarn in an axial direction of the yarn, and constructed such that a controlled surface electrical potential is generated by a maintenance or release of the external force.

公开(公告)号：US20220364277A1

公开(公告)日：2022-11-17

申请号：US17857406

申请日：2022-07-05

Applicant: Murata Manufacturing Co., Ltd. ,  TEIJIN FRONTIER CO., LTD.

Inventor： Kenichi MORI ,  Daiji TAMAKURA ,  Masayuki TSUJI ,  Kenichiro TAKUMI ,  Ryo TODO ,  Hirokazu HAYASHI

IPC: D02G3/44 ,  D02G3/02 ,  D06M15/507 ,  D06M15/564 ,  D06M11/46

Abstract: A yarn containing a plurality of potential-generating filaments. The yarn is characterized in that the plurality of potential-generating filaments are constructed such that the yarn has a specific permittivity of 4.5 or less. In a specific configuration, the plurality of potential-generating filaments are constructed such that the distance between the potential-generating filaments is about 0 μm to about 10 μm. Also provided is a fabric that contains the yarn.