ADHESIVE MARKING DEVICE

Abstract

An adhesive marking device generally includes an adhesive layer, a marking layer arranged on the adhesive layer, and a varnish layer that covers the marking layer. The marking layer includes a marking and a carrier film. The marking device generally has a moisture vapour transmission rate (MVTR) greater than or equal to 50 g/(m.sup.2.Math.day).

Claims

1. An adhesive marking device for an aircraft comprising: an adhesive layer; a marking layer arranged on the adhesive layer and comprising a marking and a carrier film; and a varnish layer that covers the marking layer, wherein the adhesive marking device has a moisture vapour transmission rate (MVTR) greater than or equal to 50 g/(m.sup.2.Math.day).

2. An adhesive marking device according to claim 1, wherein the carrier film is made from a permeable material.

3. An adhesive marking device according to claim 1, wherein the carrier film comprises at least one characteristic selected from the group consisting of: porous, woven and perforated.

4. The adhesive marking device according to claim 3, wherein the carrier film is made from a material chosen from the group consisting of: polyester, polyurethane, polyether, polyethylene, silicone polymer, polytetrafluoroethylene, polypropylene, polyvinyl chloride, polyolefin, polyalkene, polysulfone, poly(vinyl acetate), poly(vinyl alcohol) and polyamide.

5. The adhesive marking device according to claim 1, wherein the MVTR is between 50 and 1500 g/(m.sup.2.Math.day).

6. The adhesive marking device of claim 1, wherein the adhesive marking device is configured to be stripped by a stripping agent chosen from the group consisting of: benzyl alcohol, methylene chloride, phenol, benzaldehyde, and mixtures thereof.

7. The adhesive marking device of claim 1, wherein the varnish layer is silk screened, painted or printed.

8. The marking device of claim 1, wherein the adhesive layer is sensitive to pressure or can be reactivated.

9. A method for manufacturing the marking device of claim 1, comprising: supplying a carrier film; applying a marking on at least one side of the carrier film form a marking layer; affixing an adhesive layer against the marking layer; and depositing a varnish on the marking layer to form a varnish layer.

10. A method for manufacturing an adhesive marking device for an aircraft, comprising: supplying a carrier film having a moisture vapour transmission rate (MVTR) between 50 and 1500 g/(m.sup.2.Math.day); applying a marking on at least one side of the carrier film to form a marking layer; affixing an adhesive layer against the marking layer; and depositing a varnish on the marking layer to form a varnish layer.

Description

5. LIST OF FIGURES

[0075] Other purposes, characteristics and advantages of the invention shall appear upon reading the following description given solely in a non-limiting manner and which makes reference to the accompanying figures wherein:

[0076] FIG. 1 is a cross-section schematic view of a marking device according to an embodiment of the invention.

6. DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION

[0077] In the FIGURE, the scales and the proportions are not strictly respected and this, for the purposes of illustration and clarity, in particular the thicknesses are excessively enlarged.

[0078] The marking device 1 shown in FIG. 1 comprises a handling sheet 7, a varnish layer 4, a marking layer 2, an adhesive layer 5 and a protective sheet 6.

[0079] The marking layer comprises a marking 3 arranged on a carrier film 8. The marking 3 is comprised of an ink with a thickness between 5 and 50 m. The carrier film 8 is arranged on the adhesive layer 5. The adhesive layer 5 has a thickness between 25 m and 50 m. The adhesive layer 5 is covered with a protective sheet 6. The protective sheet 6 is provided in order to be easily removed before the marking device 1 is used. The protective sheet 6 is for example made of silicone paper.

[0080] A varnish layer 4 covers the marking 3. The varnish layer 4 also covers the surface of the carrier film 8 that is not covered by the marking 3.

[0081] A handling sheet 7 is arranged on the varnish layer 4. The handling sheet 7 is for example made of paper or of semi-transparent polyethylene. It is glued to the varnish layer 4 with an adhesive of which the 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 adhesive layer 5 on the substrate.

7. EXAMPLES

[0082] Determination of the Water Vapour Transmission Coefficient

[0083] Equipment and Methods

[0084] The transmission coefficient of the water vapour of the marking device is determined according to the standard ASTM F 1249 at the temperature of 38 C. and 100% RH.

[0085] The measurements are taken with a MOCON PERMETRAN W 3-33 apparatus.

[0086] Five marking devices were tested. The first marking device comprises a translucent carrier film made from a permeable material. The second marking device comprises a translucent microporous carrier film. The third marking device comprises a conventional carrier film. The fourth marking device comprises a white carrier film made of permeable material. The fifth device comprises a white microporous carrier film.

[0087] For each marking device tested, a sample is placed in a test cell between two chambers at the temperature of 38 C.+/1 C. The adhesive face of the marking device is placed on the side of the wet chamber (100% RH) and the other facing the contact of the dry chamber swept with dry nitrogen gas with a flow rate of 100 ml/min. The water vapour transmitted through the marking device is analysed by an Infrared detector (analysis of 3 marking devices per reference).

[0088] The measures are taken after 30 minutes of stabilisation in situ of the marking device. The calibration of the signal is carried out using a standard film that is Water Vapour Transmission Reference certified by NIST. The correct operation of the measurement system is controlled during each series of measurements by the response of a standard film placed in a special chamber provided for this purpose.

[0089] Results

[0090] The results are expressed in g/(m.sup.2*day).

[0091] They depend on the thickness. They are therefore also expressed in g*mm/(m.sup.2*day)

TABLE-US-00001 TABLE 1 MVTR in g/(m.sup.2*day) Standard e1 Measurement 1 e2 Measurement 2 e3 Measurement 3 Mean Mean deviation Reference m g/(m.sup.2*day) m g/(m.sup.2*day) m g/(m.sup.2*day) m g/(m.sup.2*day) g/(m.sup.2*day) Marking 1 156 64.4 161 62.8 161 54.4 159 60.5 5.4 Marking 2 157 86.2 154 88 153 83.3 155 85.8 2.4 Marking 3 130 20.1 132 20.4 129 20.6 130 20.4 0.3 Marking 4 111 52.3 110 53 112 54.1 111 53.1 0.9 Marking 5 125 75.7 119 79.1 120 68.5 121 74.4 5.4

TABLE-US-00002 TABLE 2 MVTR in g * mm/(m.sup.2 * day) Standard Measurement 1 Measurement 2 Measurement 3 Mean deviation Reference g * mm/(m.sup.2 * day) g * mm/(m.sup.2 * day) g * mm/(m.sup.2 * day) g * mm/(m.sup.2 * day) g * mm/(m.sup.2 * day) Marking 1 10.0 10.1 8.8 9.6 0.8 Marking 2 13.5 13.6 12.7 13.3 0.5 Marking 3 2.6 2.7 2.7 2.7 0.1 Marking 4 5.8 5.8 6.1 5.9 0.1 Marking 5 9.5 9.4 8.2 9.0 0.7

[0092] Bubbling Test

[0093] Equipment and Methods

[0094] Various paints of the base coat or top coat type were applied on a surface used in aeronautics (Aluminium 2024 CLAD, Aviox CF Primer 37124). After a given drying time, the marking devices were affixed onto this surface.

[0095] A clear coat was applied over it all. After a given drying time at ambient temperature (Tamb) or at 60 C., the state of the marking device was checked visually, in particular in order to check for the presence of bubbles or cracks.

[0096] Results

[0097] The results are logged in the table 5 hereinbelow.

[0098] No bubbling was observed for marking devices with an MVTR greater than 50 g/(m.sup.2.Math.day) following an application on paint which is just dry enough for the application of stencils (dry to tape).

[0099] In the table hereinbelow, the term dry to dust applies to a paint that has just been applied and that appears dry to the touch.

TABLE-US-00003 TABLE 3 Bubbling Test Paint cycle Basecoat accelerated Basecoat Basecoat Aerobase paint cycle paint cycle Topcoat paint Topcoat paint Paint drying time Aerobase Dry Aerobase cycle 77702 cycle 77702 15 min 25 min to dust Dry to tape Dry to dust Dry to tape MVTR Tamb + 15 min Tamb + 25 min Paint drying time at Tamb Paint drying time at Tamb Marking (g/(m.sup.2*day) T60 C. T60 C. 1.5 h 2 h 3 h 2 h 3 h 4 h 5 h 1 60.5 Bubbling No Very No No Bubbling Very No No bubbling fine bubbling bubbling fine bubbling bubbling bubbling bubbling 2 85.8 No No No No No Very No No No bubbling bubbling bubbling bubbling bubbling fine bubbling bubbling bubbling bubbling 3 20.4 Strong Bubbling Strong Strong Bubbling Strong Bubbling Bubbling Bubbling bubbling bubbling bubbling bubbling 4 53.1 NR NR Very No No Bubbling Very No No fine bubbling bubbling fine bubbling bubbling bubbling bubbling 5 74.4 No No Very No No Bubbling Very No No bubbling bubbling fine bubbling bubbling fine bubbling bubbling bubbling bubbling