# US 11,123,962 B2 · Multifunctional adhesive film for the surface protection of workpieces

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- Number: US 11,123,962 B2
- Document ID: US11123962B2
- Status: Granted
- Kind: B2
- Application number: 15/510,684
- Filed: 2015-09-14
- Published: 2017-09-21
- Granted: 2021-09-21
- Earliest claimed: 2014-09-15
- Assignees: Airbus SAS; Adhetec
- Applicants: Airbus Group SAS; Adhetec
- Inventors: Elisa Campazzi; Marie-Paule Guillou; Nicolas Mouyen
- Web page: https://patentgrep.com/patent/US11123962B2

## CPC

- B32B 27/06: as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)}
- B29C 51/002: {characterised by the choice of material}
- B32B 3/14: characterised by a face layer formed of separate pieces of material {which are juxtaposed side-by-side (B32B5/02 takes precedence)}
- B32B 7/05: the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection (using interposed adhesives or bonding materials applied in spaced arrangements B32B7/14)
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/00: Layered products comprising {a layer of} synthetic resin {(fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18)}
- B32B 27/285: {comprising polyethers}
- B32B 27/288: {comprising polyketones}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/40: comprising polyurethanes
- B32B 37/12: characterised by using adhesives
- B64D 45/00: Aircraft indicators or protectors not otherwise provided for
- C09J 7/22: Plastics; Metallised plastics
- C09J 7/30: characterised by the adhesive composition
- C09J 7/38: Pressure-sensitive adhesives [PSA]
- C09J 7/381: {based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds}
- C09J 7/383: {Natural or synthetic rubber}
- C09J 7/385: {Acrylic polymers}
- B29C 63/0017: {characterised by the choice of the material}
- B29K 2023/06: {PE, i.e. polyethylene}
- B29K 2023/0658: {characterised by its molecular weight}
- B29K 2071/00: Use of polyethers {, e.g. PEEK, i.e. polyether-etherketone or PEK, i.e. polyetherketone or derivatives thereof}, as moulding material
- B29K 2075/00: Use of {PU, i.e.} polyureas or polyurethanes {or derivatives thereof}, as moulding material
- B29K 2105/0097: {Glues or adhesives, e.g. hot melts or thermofusible adhesives}
- B29K 2105/256: {Sheets, plates, blanks or films}
- B29K 2995/0087: Wear resistance
- B32B 2250/44: Number of layers variable across the laminate
- B32B 2307/554: Wear resistance
- B32B 2307/738: Thermoformability
- B32B 2371/00: Polyethers, e.g. PEEK, i.e. polyether-etherketone; PEK, i.e. polyetherketone
- B32B 2405/00: Adhesive articles, e.g. adhesive tapes
- B32B 2605/18: Aircraft
- B64D 15/00: De-icing or preventing icing on exterior surfaces of aircraft
- B64D 2045/009: {Fire detection or protection; Erosion protection, e.g. from airborne particles}
- C09J 2301/122: the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
- C09J 2423/046: in the substrate
- C09J 2475/006: in the substrate
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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)
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS

## Abstract

A multilayer thermoformable film to protect the surface of a workpiece includes an underlayer having first and second faces. The underlayer is made from an adhesive material configured to adhere to the surface of the workpiece by the first face. At least one layer of polymer material is attached to the second face of the adhesive underlayer. The layer of polymer material is resistant to erosion by solid particles and to erosion by liquid particles. It is formed from a polymer material chosen from a polyurethane, a polyether ether ketone and a polyethylene having a very high molecular weight, with a Shore D hardness of between 50 and 65 D. A method of surface protection of the workpiece includes thermoforming the film in a shape adapted to match the shape of at least a portion of the workpiece and applying the film thermoformed onto the surface of the workpiece.

## Claims

### Claim 1

A multilayer thermoformable film to protect a surface of a part, comprising:
a sublayer of an adhesive material, referred to as an adhesive sublayer, comprising first and second faces, the adhesive sublayer configured to adhere to the surface of the part via the first face;
at least one layer made of polymer material attached to the second face of the adhesive sublayer opposite the first face, and said at least one layer made of polymer material is resistant to erosion by solid particles and to erosion by liquid particles;
wherein said at least one layer made of polymer material comprises a plurality of layer portions, at least one layer portion is a functional layer made of polymer material having an anti-icing function; and
wherein said at least one layer made of polymer material is formed from a polymer material selected from a thermoplastic polyurethane, a polyether ether ketone and an ultra-high molecular weight polyethylene, with a Shore D hardness of between 50 and 65 D.

### Claim 2 (depends on 1)

The multilayer thermoformable film as claimed in claim 1, wherein said at least one layer made of polymer material has a thickness between 50 and 500 μm.

### Claim 3 (depends on 2)

The multilayer thermoformable film as claimed in claim 2, wherein said at least one layer made of polymer material has a thickness between 100 and 300 μm.

### Claim 4 (depends on 3)

The multilayer thermoformable film as claimed in claim 3, wherein said at least one layer made of polymer material has a thickness equal to 200 μm.

### Claim 5 (depends on 1)

The multilayer thermoformable film as claimed in claim 1, wherein said at least one layer made of polymer material is surface-functionalized.

### Claim 6 (depends on 1)

The multilayer thermoformable film as claimed in claim 1, wherein said functional layer made of polymer material has a fouling resistance function.

### Claim 7 (depends on 6)

The multilayer thermoformable film as claimed in claim 6, wherein said at least one layer made of polymer material, said functional layer made of polymer material and the adhesive sublayer are joined to one another by an adhesive, heat-sealed to one another, or co-extruded to one another.

### Claim 8 (depends on 1)

The multilayer thermoformable film as claimed in claim 1, wherein said at least one layer comprises a second layer made of polymer material having a surface structuring that limits drag in air.

### Claim 9 (depends on 8)

The multilayer thermoformable film as claimed in claim 8, wherein said at least one layer made of polymer material, said second layer made of polymer material and the adhesive sublayer are joined to one another by an adhesive, heat-sealed to one another, or co-extruded to one another.

### Claim 10 (depends on 1)

The multilayer thermoformable film as claimed in claim 1, wherein the adhesive sublayer is formed of a pressure-sensitive adhesive material.

### Claim 11 (depends on 10)

The multilayer thermoformable film as claimed in claim 10, wherein the pressure-sensitive adhesive material is chosen from acrylic, rubber or silicone materials.

### Claim 12 (depends on 1)

The multilayer thermoformable film as claimed in claim 1, wherein the adhesive sublayer has a thickness between 25 and 100 μm.

### Claim 13 (depends on 1)

A process for protecting a surface of a part, comprises the steps of:
thermoforming the multilayer thermoformable film as claimed in claim 1 to a shape matching a shape of at least one section of the part; and
applying the multilayer thermoformable film to the surface of said at least one section of the part.

### Claim 14 (depends on 13)

The process of claim 13 is utilized to protect on an outer surface of an aircraft.

### Claim 15 (depends on 1)

A kit for protecting a surface of a part, comprising a plurality of multilayer thermoformable films as claimed in claim 1 that are thermoformed such that each multilayer thermoformable film matches a shape of a section of the part and said plurality of multilayer thermoformable films together cover an entire surface of the part to be protected.

### Claim 16 (depends on 15)

The kit as claimed in claim 15, further comprising a tool to apply said plurality of multilayer thermoformable films to the surface of the part.