# US 2014/0197273 A1 · Method for Producing a Surface Structure with Lightning Protection, and Surface Structure Which Can be Produced in This Way

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- Number: US 2014/0197273 A1
- Document ID: US20140197273A1
- Status: Published application
- Kind: A1
- Application number: 14/122,426
- Filed: 2012-05-25
- Published: 2014-07-17
- Earliest claimed: 2011-05-27
- Assignees: EADS Deutschland GmbH
- Inventors: Juergen Steinwandel; Martin Englhart; Dietrich P. Jonke; Helmut Piringer; Wilhelm Wulbrand
- Web page: https://patentgrep.com/patent/US20140197273A1

## CPC

- B64D 45/02: Lightning protectors; Static dischargers
- B29C 70/885: {with incorporated metallic wires, nets, films or plates (as lost heating elements B29C35/0272, B29C61/0625)}
- B32B 15/14: next to a fibrous or filamentary layer
- Y10T 156/10: Methods of surface bonding and/or assembly therefor
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method for producing a surface structure with a lightning strike protective system involves providing a support structure based on a fiber-reinforced composite material. At least one arrangement of a lightning strike protective material made from or with a conductive material is applied onto the support structure so that the lightning strike protective material arrangement adheres to the support structure in such a way that it is held securely in its position. A cover material is applied in such a way that it embeds the at least one arrangement of a lightning strike protective material that is held securely in its position on the support structure, and the cover material is solidified.

## Claims

### Claim at position 1

1-12. (canceled)

### Claim 13

A method for producing a surface structure having a lightning strike protective system, said method comprising the steps:
a) providing a support structure of a fiber-reinforced composite material;
b) applying an arrangement of electrically conductive particles as the lightning triggering elements onto the support structure in such a manner that the electrically conductive particles adhere in a fixed position in a particular arrangement and distribution on the support structure, in order to form an arrangement of a lightning strike protective material from or with a conductive material;
c) applying a cover material in such a way that it embeds the arrangement of the lightning strike protective material that is held securely in its position on the support structure; and
d) solidifying the applied cover material,
wherein the electrically conductive particles are fixed in position on the support structure prior to embedding in the cover material.

### Claim 14 (depends on 13)

The method of claim 13, wherein step b) further comprises:
b1) gluing the arrangement of the lightning strike protective material, which is formed by the particles, on the support structure using an adhesive.

### Claim 15 (depends on 14)

The method of claim 14, wherein step b1) further comprises:
b1b) applying the adhesive on the support structure in certain regions, in order to form a plurality of adhesive areas, or
b1c) applying the adhesive on the support structure at certain points.

### Claim 16 (depends on 14)

The method of claim 14, wherein the adhesive applied in step b1) is an electrically conductive adhesive.

### Claim 17 (depends on 13)

The method of claim 13, wherein the electrically conductive particles are selected from a group that includes fibers, carbon fibers, tubes, nanotubes, filaments, SIC filaments, graphite filaments, and metal pins.

### Claim 18 (depends on 13)

The method of claim 13, wherein step b) further comprises:
spraying metal pins onto the support structure.

### Claim 19 (depends on 18)

The method of claim 18, wherein the metal pins are composed of aluminum powder.

### Claim 20 (depends on 13)

The method of claim 13, wherein step a) further comprises:
producing a two-dimensional flat component substrate from a CFRP composite material.

### Claim 21 (depends on 20)

The method of claim 20, wherein the CFRP composite material is an epoxy resin reinforced with carbon fibers.

### Claim 22 (depends on 13)

The method of claim 13, wherein prior to step b) the support structure is provided on the surface, which is to be provided with the arrangement of the lightning strike protective material, with a felt made of conductive or non-conductive fibers as an intermediate layer between the fiber-reinforced composite material and the arrangement of the lightning strike protective material.

### Claim 23

A method of manufacturing a component of an aircraft, the component having a surface structure with a lightning strike protective system, the method comprising the steps:
a) providing a support structure of a fiber-reinforced composite material;
b) applying an arrangement of electrically conductive particles as the lightning triggering elements onto the support structure in such a manner that the electrically conductive particles adhere in a fixed position in a particular arrangement and distribution on the support structure, in order to form an arrangement of a lightning strike protective material from or with a conductive material;
c) applying a cover material in such a way that it embeds the arrangement of the lightning strike protective material that is held securely in its position on the support structure; and
d) solidifying the applied cover material,
wherein the electrically conductive particles are fixed in position on the support structure prior to embedding in the cover material, and the surface structure is of the component of the aircraft.

### Claim 24

An aircraft component with a surface structure having a lighting strike protective system, the surface structure comprising:
a support structure of a fiber-reinforced composite material;
an arrangement of electrically conductive particles as the lightning triggering elements applied onto the support structure in such a manner that the electrically conductive particles adhere in a fixed position in a particular arrangement and distribution on the support structure, in order to form an arrangement of a lightning strike protective material from or with a conductive material; and
a cover material applied to the arrangement of electrically conductive particles in such a way that it embeds the arrangement of the lightning strike protective material that is held securely in its position on the support structure,
wherein the cover material is solidified and wherein the electrically conductive particles are fixed in position on the support structure prior to embedding in the cover material.
