FR3051393A1 - ADHESIVE MARKING DEVICE - Google Patents

Abstract

The invention relates to an aircraft adhesive marking device (1) comprising: - an adhesive layer (5) and - a marking layer (2) placed on the adhesive layer (5) and comprising a marking (3). ) and a support film (8) characterized in that the support film (8) is able to be etched by a pickling agent.

Description

TECHNICAL FIELD OF THE INVENTION The invention relates to an adhesive marking device and more particularly to an aircraft marking device. 2. Technological background

Many markings must be affixed both outside and inside aircraft for identification, control, security or decorative purposes. In the context of the invention, the term "marking", one or more signs such as letter, number, symbol, drawing ... These markings can be of any shape and any size.

For reasons of limited size and requiring high resolution, the use of adhesive marking devices is a preferred solution.

These adhesive marking devices must withstand extreme conditions. Indeed, they are subjected to both high and low temperatures, thermal shock, humidity and significant pressure variations. They are also highly exposed to ultraviolet light.

These adhesive marking devices must have a small thickness and be applied to their substrate so as to make no protrusion. Indeed, the marking must be as thin as possible to better resist erosion.

In parallel, the marking devices must also be easily removable. Indeed, it may be necessary to remove a marking device for example to change it or when the aircraft must be repainted / stripped. The marking devices must therefore both withstand the conditions to which they are subjected and be easy to remove as soon as the operator wishes. These devices are usually removed mechanically by the operators which increases the maintenance time and is tedious. OBJECTIVES OF THE INVENTION The invention aims to overcome at least some of the disadvantages of known aircraft marking devices.

In particular, the invention aims to provide, in at least one embodiment of the invention, a marking device that can be easily removed by an operator while having a resistance to the extreme conditions to which the aircraft are subjected. The invention also aims to provide, in at least one embodiment, an aircraft marking device that can be removed from the substrate on which it is affixed without material, product or specific techniques. The invention also aims to provide, in at least one embodiment, an aircraft marking device that can be quickly removed from the substrate on which it is affixed. The invention aims to provide, in at least one embodiment, an aircraft marking device that can be placed on a substrate that has just been painted. The invention aims to provide, in at least one embodiment of the invention, a marking device resistant to the extreme conditions to which the aircraft are subjected. The invention also aims to provide, in at least one embodiment, an aircraft marking device that can be installed easily and quickly. The invention also aims to provide, in at least one embodiment, an aircraft marking device that can be applied in a narrow manner on a substrate and thus insensitive to erosion. 4. Presentation of the invention

To do this, the invention relates to an adhesive marking device for aircraft comprising: an adhesive layer and a marking layer placed on the adhesive layer and comprising a marking and a support film characterized in that the support film is able to be pickled by a stripping agent. Note that in the following description, the terms "above", "below", "above", "below" and the like are used to define a sequence relationship between the various layers or films constituting the device. marking according to the invention and / or their respective faces, with reference to an axis normal to the surface of the substrate on which the marking device is to be affixed and oriented from the substrate to the outside of the marking device.

The marking device comprises a support film at its marking layer. The support film may allow to opacify the adhesive marking device. It also makes it possible to improve the mechanical and / or thermal resistance of the marking device. However, the presence of a support film makes the removal of the marking device on the substrate even more difficult. The inventors have surprisingly found that it was sufficient that only the support film is capable of being stripped so that the entire marking device is able to be etched. The marking device can be removed from its substrate by simply applying a pickling agent. The removal of the marking device is particularly necessary during the stripping of the aircraft on which it is affixed. The stripping of an aircraft is done every 5 or 10 years for aesthetic reasons, but also to meet the normal wear and tear of the paint. In this context, the removal of the marking device can be done simultaneously with the stripping of the paint of the aircraft without this requiring an additional step.

The marking device can be affixed both inside and outside an aircraft. Preferably, the adhesive marking device is intended to be affixed outside an aircraft, for example on the fuselage. The marking device according to the invention is in fact particularly adapted to the extreme conditions to which the fuselage of an aircraft is subjected. In addition, the marking device can easily be etched by a chemical method. It is no longer necessary to provide a marking device which is not closely connected to the substrate so that it can be removed mechanically when desired. Since the marking device can be tightly bonded to the substrate, it becomes insensitive to erosion.

Typically, the etchant is a chemical etchant. The etchant may be any type of stripping agent qualified in the aeronautical field, for example a conventional stripper or intermediate layer. In a preferred embodiment, the etchant comprises benzyl alcohol, methylene chloride, phenol, benzaldehyde methylene chloride, hydrogen peroxide, alkylphenol ethoxylate, and / or mixtures thereof. Preferably, the etchant comprises benzyl alcohol and / or methylene chloride.

According to a preferred embodiment, the support film comprises a resin selected from the group consisting of polyepoxide, polyurethane, alkyd and mixtures thereof. The support films based on these resins are capable of being etched by stripping agents qualified in the aeronautical field.

Preferably, the support film comprises a resin selected from the group consisting of polyepoxide, polyurethane and alkyd. These resins are the most commonly used binders for aircraft paints. A marking device whose support film comprises these resins is suitable for being pickled by the same pickling agents as those of the paints comprising these same resins as binder. Thus, when an operator stripping the paint of the aircraft, the marking device will be etched with the paint because its support film contains the same resins and is therefore sensitive to the same stripping agents.

According to one embodiment, the varnish layer is capable of being etched by a cleaning agent. The fact that the lacquer layer is also removable can accelerate the stripping of the marking device.

According to a preferred embodiment, the marking device has a wet vapor transmission rate (MVTR) greater than or equal to 50g / (m ^ .j).

Moisture Vapor Transmission Rate MVTR is also measured according to ASTM F1249.

In the aeronautical field, adhesive marking devices are generally affixed to a substrate which has just been painted. However, if the adhesive marking device is affixed too quickly on such a substrate, gases from the paint are emitted under the marking device. These gases trapped under the marking device form bubbles and the marking device is gondola. In addition to the unsightly nature of these bubbles, they create irregularities on the surface of the marking device making it more susceptible to erosion. The marking device according to the invention is particularly suitable for being affixed to a substrate that has just been painted. With a MVTR greater than or equal to 50 g / (m ^ .j), the marking device is sufficiently permeable to allow the gases from the desolvation of the paint to escape during the polymerization and to prevent bubbling. By avoiding bubbling, it is particularly avoided that the marking is damaged by the swelling of the marking device.

Preferably, the marking device having a wet vapor transmission rate (MVTR) greater than or equal to 60g / (mw), more preferably at 70g / (mw), still more preferably at 80g / ( m ^ .j).

According to a preferred embodiment, the marking device has a MVTR between 50 and 1500 g / (m ^ .j). In this range of MVTR, the marking device is sufficiently permeable to allow escape of the gases from the paint while maintaining an increased resistance to the extreme conditions to which the aircraft are subjected. In order to have a marking device with optimum resistance especially when it is intended to be affixed to the outside of an aircraft, it is preferable that the latter has a MVTR which is less than 700 g / (m · d). , more preferably less than 500

According to a preferred embodiment, the support film has a MVTR greater than or equal to 50 g / (m ^ .24h) and preferably between 50 and 1500g / (m .24h). When the marking device comprises a support film, the latter generally proves to be the most occlusive element. By taking a support film whose MVTR is greater than or equal to 50 g / (m .24h), the permeability of the entire marking device will be sufficient to limit bubbling.

The support film may be porous, woven, perforated or a permeable material. Thus, because of its structure, the gases resulting from the polymerization of the paint can easily pass through it. Preferably, the support film is made of a permeable or porous material. This type of structure provides a high MVTR while maintaining good mechanical strength.

According to a preferred embodiment, the support film has a thickness of between 20pm and 70pm, preferably between 20pm and 50pm. The small thickness of the support film allows a better permeability.

Preferably, the marking is placed on the support film.

The marking can be achieved by UV-curing inks, solvent inks, aqueous inks, UV curing paints, solvent paints, aqueous paints. Preferably, the marking is carried out in an ink or paint of a nature identical to that intended for painting the substrate on which the marking device is to be applied.

According to a preferred embodiment, the marking is a digitally printed marking, preferably in a drop on demand (DOD) mode. Thus, the marking is less occlusive and the gases resulting from the polymerization of the paint can pass through the latter.

The marking device preferably comprises a layer of varnish covering the marking layer. The varnish layer protects the marking layer and in particular the marking. Hile also allows smoothing of the marking layer and good adhesion of aerosol varnishes. When the marking device comprises a support film, the lacquer layer may also cover the portions of the support film which are not covered by the marking.

According to a preferred embodiment, the varnish layer is composed of screen-printed, spray-varnished or digitally printed varnish, preferably by DOD printing. Preferably, the varnish is deposited by DOD printing because this technique allows a better permeability.

The varnish may be UV curing varnish or solvent varnish.

The marking device also comprises an adhesive layer.

Preferably, the support film is placed on the adhesive layer.

The adhesive layer may be a layer of pressure-sensitive or reactivatable adhesive. Preferably, the adhesive layer is pressure sensitive.

According to a preferred embodiment, the adhesive layer has a thickness between 25pm and 50pm.

Preferably, the adhesive layer is capable of being pickled by a pickling agent.

The adhesive layer can be protected by a protective sheet.

The marking device may further comprise a handling sheet. The handling sheet is placed on the upper side of the marking device so as to facilitate the application of the latter. The invention also relates to an adhesive marking device for an aircraft comprising: an adhesive layer and a marking layer placed on the adhesive layer and comprising a marking and a supportfilm supporting film comprising a resin selected from the group consisting of polyepoxide, polyurethane, alkyd, and mixtures thereof so that the marking device is suitable for pickling. The invention also relates to a method of manufacturing a marking device according to the invention comprising the steps of: -providing a support film, -appliquer a marking on at least one side of the support film so as to form a marking layer and - affix a layer of adhesive against the marking layer.

According to a preferred embodiment, the method comprises a step of depositing a varnish on the marking layer so as to form a layer of varnish.

Typically, the support film comprises an upper side and a lower side opposite the upper side.

According to a preferred embodiment, the marking is applied on the upper side of the support film.

Preferably, the adhesive layer is affixed to the underside of the support film.

Preferably, the marking is applied by printing, preferably by digital printing, more preferably by DOD printing.

According to a preferred embodiment, the adhesive layer is applied to the underside of the support film.

Preferably, the coating is deposited by screen printing and / or printing, preferably by digital printing, more preferably by DOD printing. The invention also relates to an aircraft comprising a marking device according to the invention.

Preferably, the support film of the marking device comprises a resin which is a binder of the paint of the aircraft on which the marking device is intended to be affixed. The invention also relates to the use of the device according to the invention for the marking of an aircraft. 5. List of Figures Other objects, features and advantages of the invention will appear on reading the following description given solely by way of non-limiting example and which refers to the appended figures in which: FIG. 1 is a diagrammatic view in FIG. section of a marking device according to one embodiment of the invention. 6. Detailed description of an embodiment of the invention

In the figure, the scales and the proportions are not strictly respected and this, for purposes of illustration and clarity, in particular the thicknesses are exaggeratedly enlarged.

The marking device 1 shown in FIG. 1 comprises a handling sheet 7, a lacquer layer 4, a marking layer 2, an adhesive layer 5 and a protective sheet 6.

The marking layer comprises a marking 3 placed on a support film 8. The marking 3 consists of ink having a thickness of between 5 and 50 μm. The support film 8 is placed on the adhesive layer 5. The adhesive layer 5 has a thickness between 25pm and 50pm. The adhesive layer 5 is covered with a protective sheet 6. The protective sheet 6 is provided to be easily removable before the marking device 1 is used. The protective sheet 6 is for example made of silicone paper.

A layer of varnish 4 covers the marking 3. The varnish layer 4 also covers the surface of the support film 8 not covered by the marking 3.

A handling sheet 7 is placed on the varnish layer 4. The handling sheet 7 is for example paper or semi-transparent polyethylene. It is glued to the layer of varnish 4 with an adhesive whose adhesive power is greater than the adhesive power of the adhesive layer 5 on its protective sheet 6 but much less than the adhesive power of this same layer of adhesive 5 on the substrate.

Claims (9)

An aircraft adhesive marking device (1) comprising; a layer of adhesive (5) and a marking sewing (2) placed on the layer of adhesive (5) and comprising a marking (3) and a support film (8), characterized in that the support film ( 8) is pickled by a pickling agent and comprises a resin selected from the group consisting of polyepoxide, polyurethane, alkyd and mixtures thereof. 2. marking device (1) according to claim 1, characterized in that the etchant is selected in the skirt consisting of benzyl alcohol, methylene chloride, phenol, benzaldehyde, methyl chloride, hydrogen peroxide, Talkylphenol ethoxylate and mixtures thereof. 3. A molding device (1) according to claim 1 or 2 caiactaisée in that the marking device (1) has a wet vapor transmission rate (MVTR) greater than or equal to 50g / (m ^ .j). 4. marking device (1) according to any one of claims 1 to 3 characterized in that the marking device (1) has a wet vapor transmission rate (MVTR) including raitre 50 and 1500 gf ^ (m ^ j). 5. marking device (1) according to any one of claims 1 to 4 characterized in that it comprises a layer of varnish (4) covering the marking layer (2). 6. A method of manufacturing a marking device (1) as defined in any one of claims 1 to 5, characterized in that it comprises the steps of: -providing a support film (8), -appliquer marking on at least one side of the support film (8) so as to form a marking layer (2) and - affixing a layer of adhesive (5) against the marking layer (2). 7. A method of febrication of a marking device (1) according to claim 6 characterized in that it compr 'id a deposit of a v ^ is on the marking layer (2) so as to form a layer of varnish. 8. Aircraft characterized in that it comprises a marking device as defined in any one of claims 1 to S. 9 <Use of a marking device as defined in any one of claims 1 to 5 for the marking of an aircraft.