Electrically conductive nonwoven, grounding ring, comprising such a nonwoven and arrangement therewith

Patent metadata

Field	Value
Publication number	US-12580459-B2
Application number	US-202217752887-A
Country	US
Kind code	B2
Filing date	May 25, 2022
Priority date	May 28, 2021
Publication date	Mar 17, 2026
Grant date	Mar 17, 2026

Abstract

An electrically conductive nonwoven includes: a raw nonwoven having a first electrical conductivity; and electrically conductive particles having a second electrical conductivity. The second electrical conductivity is higher than the first electrical conductivity. In an embodiment, the particles have a proportion by weight of from 30% to 60%. In an embodiment, the particles have a size of from 3 μm to 8 μm.

First claim

What is claimed is:

1 . An electrically conductive nonwoven, comprising:
a raw nonwoven having a first electrical conductivity; and electrically conductive particles having a second electrical conductivity, wherein the second electrical conductivity is higher than the first electrical conductivity, and wherein the particles have a size of from 3 μm to 8 μm, and wherein the nonwoven has an electrical resistance of less than or equal to 10 ohms (Ω).

2 . The nonwoven of claim 1 , wherein the particles have a proportion by weight of from 30% to 60%.

3 . The nonwoven of claim 1 , wherein the particles comprise silver particles.

4 . The nonwoven of claim 1 , wherein the raw nonwoven comprises fibers having a fiber thickness of from 4 μm to 10 μm.

5 . The nonwoven of claim 4 , wherein the raw nonwoven comprises fibers having a fiber length of from 10 mm to 14 mm.

6 . The nonwoven of claim 4 , wherein the raw nonwoven comprises PTFE particles.

7 . The nonwoven of claim 6 , wherein the PTFE particles have a proportion by weight of from 5% to 15%.

8 . The nonwoven of claim 1 , wherein the nonwoven has a thickness is from 0.4 mm to 0.8 mm.

9 . The nonwoven of claim 1 , wherein the nonwoven has surface weight of from 500 g/m 2 to 1000 g/m 2 .

10 . The nonwoven of claim 1 , wherein the nonwoven has a linear pressure in a radial force measurement according to DIN 3761, measurement on a shaft, in a production-related state of the nonwoven of from 0.1 N/mm to 0.8 N/mm.

11 . A grounding ring, comprising:
a nonwoven ring comprising the electrically conductive nonwoven of claim 1 .

12 . The grounding ring of claim 11 , wherein the nonwoven ring is fastened on an electrically conductive support ring.

13 . An arrangement, comprising:
the grounding ring of claim 11 ; a first machine element; and a second machine element, wherein the grounding ring tightly touches a surface of the first machine element, wherein the first machine element is arranged concentrically with the second machine element, wherein the first machine element is arranged at a radial distance next to the second machine element, wherein the grounding ring is arranged in a gap formed by the radial distance, wherein the second machine element is grounded to a defined ground potential, and wherein the first machine element and the second machine element are respectively touched tightly by the grounding ring and are thereby electrically conductively connected to one another.

14 . The arrangement of claim 13 , wherein the first machine element comprises a shaft or a housing enclosing a shaft, and
wherein the second machine element comprises a housing enclosing the shaft or a shaft.

Assignees

• Freudenberg Carl Kg

Inventors

• Bantz Marlene
• Hofmann Jens
• Neuberger Soeren
• Morgenstern Stefan
• Colineau Francois
• Hintenlang Guenter

Classifications

• H01R4/66

  Connections with the terrestrial mass, e.g. earth plate, earth pin · CPC title

• D04H1/4382

  Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather · CPC title

• F16J15/3284

  characterised by their structure; Selection of materials · CPC title

• B60R16/02

  electric {constitutive elements} · CPC title

• H02K11/40 Primary

  Structural association with grounding devices · CPC title