Electromagnetic wave shielding device

• US 20010018123A1
• Filed: 01/29/2001
• Published: 08/30/2001
• Est. Priority Date: 01/28/2000
• Status: Abandoned Application

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: Ueda, Zenichi, Wada, Shintarou, Yoshikawa, Toshiyuki, Furumori, Kenji
• Application Number:
  US09/770,231
• Publication Number:
  US 20010018123A1
• Time in Patent Office: Days
• US Class Current: 428/343
• CPC Class Codes: A61N 1/3718 Monitoring of or protection against external electromagnetic fields or currents
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 442/659 Including an additional nonwoven fabric
• CPC Class Codes: Y10T 442/674 Nonwoven fabric with a preformed polymeric film or sheet

Abstract

An electromagnetic wave shielding device comprising an electroconductive material, a flexible material, and a pressure-sensitive adhesive layer that is or is to be applied to the electroconductive material through the flexible material. Also, disclosed are an electromagnetic wave shielding device for use in shielding a surface of body in which a cardiac pacemaker is embedded, wherein the shielding device is rectangular in shape and a shorter side and a longer side thereof have lengths (D_S and D_L, respectively) satisfying formula below:

about λ/4≦length (D_S) of shorter side≦about 3λ/4

about 2λ/5≦length (D_L) of longer side≦about 3λ/4

wherein λ represents a wavelength of electromagnetic wave to be shielded by the shielding device and a method of shielding an electromagnetic wave from a cardiac pacemaker comprising applying such an electromagnetic wave shielding device to a surface of body or underwear.

Claims

1. An electromagnetic wave shielding device comprising an electroconductive material, a flexible material, and a pressure-sensitive adhesive layer that is or is to be applied to the electroconductive material through the flexible material.

2. The electromagnetic wave shielding device as claimed in

claim 1

, wherein the electroconductive material is an electroconductive sheet and the flexible material is a flexible sheet.

3. The electromagnetic wave shielding device as claimed in

claim 2

, wherein the flexible sheet incorporates therein the electroconductive sheet and wherein at least a portion of the flexible sheet is provided with the pressure-sensitive adhesive layer.

4. The electromagnetic wave shielding device as claimed in

claim 2

, wherein the flexible sheet is provided with the electroconductive sheet on one surface thereof and the pressure-sensitive adhesive layer on the other surface thereof.

5. The electromagnetic wave shielding device as claimed in

claim 1

, wherein, wherein the electroconductive material is at least one selected from the group consisting of a metal foil, a plastic film deposited with a metal, a fabric made of a metal fiber, and a fabric coated with a metal.

6. The electromagnetic wave shielding device as claimed in

claim 1

, wherein the flexible sheet is air permeable.

7. The electromagnetic wave shielding device as claimed in

claim 1

, wherein the pressure-sensitive adhesive is provided in a pattern.

8. The electromagnetic wave shielding device as claimed in

claim 1

, wherein the shielding device is used by applying it to a surface of skin or underwear.

9. The electromagnetic wave shielding device as claimed in

claim 2

, wherein the electroconductive sheet is formed of cutting.

10. The electromagnetic wave shielding device as claimed in

claim 4

, wherein the flexible sheet is of a size greater than that of the electroconductive sheet and overruns out of peripheral portions of the electroconductive sheet.

11. The electromagnetic wave shielding device as claimed in

claim 1

, wherein the shielding device is rectangular in shape and a shorter side and a longer side thereof have lengths (D_S and D_L, respectively) satisfying formula below:

about λ

/4≦

length (D_S) of shorter side≦

about 3λ

/4 about 2λ

/5≦

length (D_L) of longer side≦

about 3λ

/4

wherein λ

represents a wavelength of electromagnetic wave to be shielded by the shielding device.

12. The electromagnetic wave shielding device as claimed in

claim 1

, wherein the pressure-sensitive adhesive layer is in the form of a pressure-sensitive adhesive double coated tape comprising a substrate provided with a pressure-sensitive adhesive layer and a separator in order on each surface thereof.

20. A method of shielding an electromagnetic wave from a cardiac pacemaker comprising applying an electromagnetic wave shielding device as claimed in

claim 1

to a surface of body or underwear.

13. An electromagnetic wave shielding device for use in shielding a surface of body in which a cardiac pacemaker is embedded, wherein the shielding device is rectangular in shape and a shorter side and a longer side thereof have lengths (D_S and D_L, respectively) satisfying formula below:

about λ

/4≦

length (D_S) of shorter side≦

about 3λ

/4 about 2λ

/5≦

length (D_L) of longer side≦

about 3λ

/4

wherein λ

represents a wavelength of electromagnetic wave to be shielded by the shielding device.

14. The electromagnetic wave shielding device as claimed in

claim 13

, wherein the shielding device comprises a metal foil or woven fabric made of a metal-clad fiber.

15. The electromagnetic wave shielding device as claimed in

claim 13

, further comprising a pressure-sensitive adhesive layer for fixing the shielding device to a surface of body.

16. The electromagnetic wave shielding device as claimed in

claim 13

, wherein the shielding device suppresses electromagnetic wave noises from outside when applied to a surface of body.

17. The electromagnetic wave shielding device as claimed in

claim 13

, wherein the shielding device is used by applying it to a surface of skin or underwear.

18. An electromagnetic wave shielding device comprising a kit comprising a first element comprising an electroconductive material and a flexible material covering at least a portion of the electroconductive material and a second element comprising a pressure-sensitive adhesive double coated tape.

19. The electromagnetic wave shielding device as claimed in

claim 18

, wherein the pressure-sensitive adhesive double coated tape comprises a support made of a plastic sheet, nonwoven fabric or fabric, having on one surface thereof a pressure-sensitive adhesive layer, which comprises a pressure-sensitive adhesive having a low skin irritation, and a separator and on another surface thereof a pressure-sensitive adhesive layer, which comprises general-purpose pressure-sensitive adhesive, and a separator.