Charge-generating thread for bacterium-countermeasure, cloth for bacterium-countermeasure, cloth, clothing article, medical member, charge-generating thread that acts on living body, and charge-generating thread for substance-adsorption

Patent metadata

Field	Value
Publication number	US-11739446-B2
Application number	US-202117324293-A
Country	US
Kind code	B2
Filing date	May 19, 2021
Priority date	Jun 6, 2016
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

A piezoelectric thread that includes a core thread; and a piezoelectric film wound around the core thread. The piezoelectric thread is constructed to generate a charge by energy imparted from outside of the piezoelectric thread.

First claim

The invention claimed is:

1. A cloth comprising:
a plurality of piezoelectric threads, each of the plurality of piezoelectric threads comprising:
a core thread; and
a piezoelectric film wound around the core thread, wherein

the plurality of piezoelectric threads are constructed to generate a charge by energy imparted from outside of the plurality of piezoelectric threads, and
the plurality of piezoelectric threads are arranged in the cloth such that the cloth has an antibacterial activity value A of >2.2 after culturing for at least 18 hours while the plurality of piezoelectric threads generate the charge by the energy imparted from the outside of the plurality of piezoelectric threads.

2. The cloth according to claim 1 , wherein the piezoelectric film comprises polylactic acid.

3. The cloth according to claim 2 , wherein the core thread comprises a natural or chemical fiber.

4. The cloth according to claim 3 , wherein the core thread comprises polylactic acid.

5. The cloth according to claim 1 , wherein the core thread comprises a natural or chemical fiber.

6. The cloth according to claim 5 , wherein the core thread comprises polylactic acid.

7. The cloth according to claim 1 , wherein the core thread is an electroconductive thread.

8. The cloth according to claim 1 , wherein the piezoelectric film is a monoaxially drawn film, and the piezoelectric film is wound around the core thread such that a drawn direction of the piezoelectric film is inclined relative to an axial direction of the core thread.

9. The cloth according to claim 1 , wherein the plurality of piezoelectric threads are in a woven configuration, and the woven configuration is configured to generate an electric field between a first thread and a second thread of the plurality of threads due to a difference in electric potential therebetween.

10. The cloth according to claim 9 , wherein the first thread and the second thread are configured to generate a current due to a difference in electric potential between the first thread and the second thread.

11. The cloth according to claim 9 , wherein the first thread generates a first charge that is different in polarity a second charge generated by the second thread.

12. The cloth according to claim 9 , wherein, in the woven configuration, the first thread is arranged in parallel with the second thread.

13. The cloth according to claim 9 , wherein, in the woven configuration, the first thread is arranged to cross the second thread.

14. The cloth according to claim 1 , wherein the plurality of piezoelectric threads include at least a first thread, a second thread, and a third thread that are braided together.

15. A clothing article comprising the cloth according to claim 1 .

16. A medical member comprising the clothing article according to claim 15 .

Assignees

• Murata Manufacturing Co

Inventors

• Ando Masamichi
• Ishino Satoshi

Classifications

• H10N30/702

  based on piezoelectric or electrostrictive fibres · CPC title

• D02G3/441 Primary

  Yarns or threads with antistatic, conductive or radiation-shielding properties (electroconductive, anti-static or radiation-shielding filaments D01F1/09, D01F1/106; anti-static fabrics D03D15/533; conducting, insulating or anti-static layers for floor coverings D06N7/0042) · CPC title

• A01N37/36

  containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids · CPC title

• D02G3/02

  Yarns or threads characterised by the material or by the materials from which they are made · CPC title

• D02G3/449 Primary

  Yarns or threads with antibacterial properties (filaments containing agents inhibiting growth of microorganisms D01F1/103) · CPC title