Electrolyte conductor, process for manufacturing an electrolyte conductor as well as an electrochemical gas sensor and a gas-measuring device with such a gas sensor

Patent metadata

Field	Value
Publication number	US-11137367-B2
Application number	US-201615348163-A
Country	US
Kind code	B2
Filing date	Nov 10, 2016
Priority date	Nov 11, 2015
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

An electrolyte conductor (1) has a nonwoven fabric (2), onto which a plastic film (3) is laminated. A process is provided for the manufacture of the electrolyte conductor (1). An electrochemical gas sensor (10) is provided with such an electrolyte conductor (1). A gas-measuring device is provided with such a gas sensor (10).

First claim

What is claimed is:

1. A process for manufacturing an electrolyte conductor comprising a nonwoven fabric; and a plastic film laminated onto the nonwoven fabric, the process comprising the steps of:
providing a first web of nonwoven fabric;
providing a second web of plastic film;
laying the first web of nonwoven fabric and the second web of plastic film on top of one another;
bonding the first web and the second web together to form a composite web by laminating, wherein the second web of plastic film is laminated partially onto only one side of the first web of nonwoven fabric in a pattern, the first web of nonwoven fabric comprising another side located opposite the one side, wherein the another side is free of lamination; and
punching or cutting a two-dimensional shape out of the composite web or winding up the composite web to form a roll.

2. A process in accordance with claim 1 , wherein a third web of plastic separating film is placed onto the second web of plastic film and the third web of plastic separating film is bonded to the second web of plastic film by laminating.

3. A process in accordance with claim 2 , wherein the third web of plastic separating film is removed from the second web of plastic film after the lamination.

4. A process in accordance with claim 1 , wherein the lamination is carried out with a roller or with a punch, on which raised sections are arranged in a pattern, wherein no side of the first web of nonwoven fabric is laminated except for the one side of the first web of nonwoven fabric.

5. A process in accordance with claim 1 , further comprising:
providing an electrochemical gas sensor with the electrolyte conductor, an electrode, an electrolyte reservoir and an electrolyte
with the electrolyte conductor forming an electrolyte conduction for conduction of the electrolyte from the electrolyte reservoir in a direction of the electrode in the electrochemical gas sensor.

6. A process in accordance with claim 1 , wherein the nonwoven fabric is a glass fiber mat.

7. A process in accordance with claim 1 , wherein the nonwoven fabric has a thickness of less than 300 μm.

8. A process in accordance with claim 1 , wherein the plastic film has a film thickness of at most 80 μm.

9. A process in accordance with claim 1 , wherein the plastic film is a hot-melt adhesive film.

10. A process in accordance with claim 1 , wherein a plastic separating film is laminated onto the second web of plastic film, the plastic separating film having a heat resistance that is greater than a heat resistance of the second web of plastic film.

11. A process in accordance with claim 10 , wherein the plastic separating film has a film thickness of at most 80 μm.

12. A process in accordance with claim 10 , wherein the second web of plastic film has a film thickness of from 30 μm to 50 μm and the plastic separating film has a film thickness of from 30 μm to 50 μm.

13. A process in accordance with claim 10 , wherein the plastic separating film consists of polytetrafluoroethylene (PTFE).

14. A process for manufacturing an electrolyte conductor, the process comprising the steps of:
providing a first web, the first web comprising a nonwoven fabric;
providing a second web, the second web comprising a plastic film;
laying the first web and the second web on top of one another;
partially laminating the second web onto only a single side of the first web in a pattern to form a composite web after laying the first web and the second web on top of one another, the first web comprising a second side opposite the single side, wherein the second side is not laminated; and
punching or cutting a two-dimensional shape out of the composite web or winding up the composite web to form a roll.

15. A process in accordance with claim 14 , wherein the nonwoven fabric is a glass fiber mat, wherein no other side of the first web is laminated except for the single side of the first web.

16. A process in accordance with claim 14 , wherein the nonwoven fabric has a thickness of less than 300 μm.

17. A process in accordance with claim 14 , wherein the plastic film has a film thickness of at most 80 μm.

18. A process in accordance with claim 14 , wherein the plastic film is a hot-melt adhesive film.

19. A process in accordance with claim 14 , wherein a plastic separating film is laminated onto the second web comprising the plastic film, the plastic separating film having a heat resistance that is higher than a heat resistance of the second web comprising the plastic film.

20. A process in accordance with claim 19 , wherein the plastic separating film has a film thickness of at most 80 μm.

Assignees

• Draeger Safety Ag & Co Kgaa

Inventors

• Gehrt Joachim
• Schaefer Susanne

Classifications

• G01N27/404 Primary

  Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid {, e.g. Clark-type oxygen sensors} · CPC title

• B32B37/22

  involving the assembly of both discrete and continuous layers · CPC title

• B29C66/712

  the composition of one of the parts to be joined being different from the composition of the other part · CPC title

• B29C66/71

  characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125) · CPC title

• G01N27/40 Primary

  Semi-permeable membranes or partitions · CPC title