EP3353357A2

EP3353357A2 - Coupling system, for example for wall panels

Info

Publication number: EP3353357A2
Application number: EP16785215.1A
Authority: EP
Inventors: Véronique DROCHON; Nathalie Moinard
Original assignee: Aplix SA
Current assignee: Aplix SA
Priority date: 2015-09-24
Filing date: 2016-09-23
Publication date: 2018-08-01
Anticipated expiration: 2036-09-23
Also published as: WO2017051132A3; JP2018528343A; EP3353357B1; US10378215B2; CN108291404B; CN108291404A; JP6981971B2; FR3041670A1; FR3041670B1; WO2017051132A2; US20180298617A1

Abstract

The invention relates to a system for attaching a coating to a surface. Said system includes: a first assembly (100) including a first holding element (120), and a second assembly (200) including a second holding element (220). The first and second holding elements (120, 220) are configured to engage so as to create a reversible link. The system is characterized in that the first holding element (120) includes a holding element portion that includes hooks having a height (Hc) of between 0.05 mm and 1 mm, and the second holding element (220) includes a holding element portion that includes loops having a height (Hb) of between 0.1 mm and 3.0 mm.

Description

Fastening system, for example for panels.

GENERAL TECHNICAL FIELD The present invention relates to fastening systems, and finds a particular application in the field of building, for example for fastening panels.

STATE OF THE ART

The laying of coatings such as glazed tiles on a wall, and in particular a vertical wall, is generally a difficult and expensive operation to achieve. The usual techniques are to apply glue on the wall and / or on the back of the coating in question, then affix the coating on the wall.

Glues having a short drying time, the user must therefore perform the installation quickly to prevent the glue dries before the coating is applied to the wall, and may also be required to produce glue regularly. It is also necessary to maintain the coating in position during the drying time of the glue, which is very disadvantageous. In order to remedy these problems related to the use of glue, it has already been proposed to replace the glue by a fastening system of the self gripping type, thus allowing for easy and multiple repositioning, without constraints on the drying time. . The pair of material forming the self-gripping must then be chosen so that the bond formed supports the weight of the coating, and ensures a positional hold at least until the positioning is finalized, for example in the case of the application of tiles, at least until the user has performed the jointing operation between the different tiles laid.

However, it is clear from the various products proposed to date that some coatings, and in particular heavy coatings such as earthenware tiles, tend to move from the initial position defined by the user when laid, under the effect the weight of the coating.

In addition, this type of attachment causes a phenomenon of yawning and / or sliding, which gives the user an improper impression pose. Indeed, especially when a user presses on a coating such as a tile, he then observes a slight displacement under the effect of the applied pressure, then a return to the initial position, which contributes to give an impression of installation poorly done, not strong or not very reassuring.

WO2009018645 in the name of TACFAST SYSTEMS describes decorative elements for use in the soil. The problems of fixing coatings by self-gripping for applications, on the one hand on the ground, and on the other hand to vertical walls, inclined or ceiling are completely different. The risk of self stalling of the coating (or stall by gravity or under the effect of the weight of the coating) fixed by self-gripping being zero for a floor application or a horizontal wall whose coating is located above of its support. Indeed, in such a configuration, the gravity does not tend to unhook the connection by self-gripping formed between the support and coating and whatever the mass of the coating. In this document WO2009018645, there is described an overlap "B" between two adjacent decorative elements and one of them overlapping the other can be moved so as to position it in a final position. Such a displacement is possible because only a very small portion of the hooks and loops cooperate together. In the document WO2009018645, besides the fact that the application described is that for the soil, it is in no way described or suggested that the decorative elements in their final position, can be movable relative to each other due in particular to the fact that the decorative element which overlaps the adjacent one is inserted in force by the installer.

PRESENTATION OF THE INVENTION

The present invention thus aims to at least partially meet the aforementioned problems.

For this purpose, the present invention provides a system for attaching a coating to a surface, comprising

a first assembly comprising a first retaining element,

a second assembly comprising a second retaining element, the first and second retaining elements being configured so as to engage in a reversible connection,

the system being characterized in that the first set and the second set are adapted so as to achieve a connection having: a first displacement under the effect of gravity less than 2 mm along a first axis XI.

Here is meant by "displacement under the effect of gravity" that the coating, because of its mass, has a vertical weight, oriented downwards, that is to say towards the Earth's gravitational center. The weight of the coating opposes a resultant formed by the reversible connection of the first and second retaining members such that the weight tends to separate the first and second retaining members.

The resultant formed by the reversible connection of the first and second retaining elements is such that it extends perpendicularly or substantially perpendicular to the plane formed by the coating from its center of gravity.

In a stabilized position, when the weight orientation is parallel and in the same direction as the orientation of the resultant force of the reversible connection of the first and second sets then slip and yawn under the effect of gravity are zero. "Stabilized position" is understood to mean a position in which the displacement of the coating is less than 5 mm per hour.

In other words, "gravity displacement" is meant without the application of an external force, other than the weight of the assembly formed by the liner and the retainer. "Gravity displacement" is measured after the first set and the second set on the liner and the surface have been applied against each other and positioned in a final position. In this final position, the first and second sets (and in particular their edges) extend substantially in the extension of one another, their faces then being substantially parallel. Is meant by substantially parallel, that the inclination between the plane formed by the first set and the plane formed by the second set is less than 10 °, in particular less than 7 °, more particularly less than 5 ° (especially the edges of first and second sets).

In particular, the first displacement under the effect of gravity is non-zero along a first axis XI. The first set and the second set are for example adapted so as to make a connection having a second displacement less than 2 mm along a second axis X2 perpendicular to the first axis XI. One of the axes XI, X2 is then typically in a plane parallel to the plane of the surface, and the other of the axes XI and X2 is in a plane perpendicular to the plane of the surface. The first set and the second set are then typically adapted to achieve a bond having a slip of less than 2mm, and a yawn less than 2 mm, or more precisely a slip of less than 1.5 mm, and a yawn less than 1.5 mm

In particular, the first displacement under the effect of gravity is non-zero along a first axis X2.

In particular, the sliding under the effect of gravity is not zero.

In particular yawning under the effect of gravity is non-zero.

The first set and the second set are, for example, adapted so as to produce a connection having a tensile strength (longitudinal traction or "shearing") of between 1.0 and 20.0 N / cm ² , in particular between 3 and 20 N / cm ² , even more particularly between 4 and 20 N / cm ² measured according to the standard NF EN 13780. The first set and the second set can also be adapted so as to achieve a bond having a peel strength included between 0.05 and 5 N / cm, more particularly between 1 and 4 N / cm, or preferably between 0.05 N / cm and 3 N / cm and measured according to standard NF EN 12242.

The first assembly and the second assembly may also be adapted so as to provide a link having a perpendicular stall resistance, which is perpendicular or substantially perpendicular to the plane formed by the first set or the second set, between 0.1 N / cm ² and 15 N / cm ² , more particularly between 1 N / cm ² and 7 N / cm ² , even more particularly between 1.5 N / cm ² and 5.5 N / cm ² measured according to standard NF G91-103.

The bonding performance of the first and second sets, for example those in peeling and / or traction, are mainly achieved by the characteristics of the first and second retaining elements. The first retaining element typically comprises a retaining element field comprising hooks having a height Hc of between 0.05 mm and 1 mm, and the second retaining element comprises a retaining element field comprising loops having a maximum height Hb between 0.1 and 3.0 mm, in particular between 0.1 and 2.0 mm, more particularly between 0.4 and 1.5 mm, more particularly between 0.5 and 1 mm, or of the order of 0.85mm +/- 0.25mm. The value of the maximum height Hb here is an average value obtained from measuring the largest distance between the foot of the loop and the end opposite the foot of the loop, made on at least thirty distinct loops of a same restraining element. In other words, not all loops are exactly the same height, some loops have a greater height than the maximum height Hb (average), and other loops have a smaller height than the maximum value. Hb (average). In some cases, a loop may cooperate with more than one hook at a time. Among all the loops, it is typically observed that at least 1% of the loops cooperate simultaneously with at least two hooks. Among all the loops, it is typically observed that less than 80% of the loops cooperate simultaneously with at least two hooks.

The hooks then comprise, for example, a shank and a gripping portion, the gripping portion having a maximum height Ht of between 0.01 and 0.15 mm, and the shank having a diameter of between 0.05 mm and 0.80 mm.

The heights Hb and Ht are such that Hb / Ht> 1, or more precisely such that 2 <Hb / Ht <40, or more precisely such as 3 <Hb / Ht <30, or such as 3 <Hb / Ht <19.

The second retainer may have a loop density of between 13 and 30 loops per centimeter.

The first retaining element may then have a hook density of between 100 and 500 hooks per cm ² . The hooks of the first retaining element are for example made of polypropylene (PP), and the loops of the second retaining element are for example made of polyamide (PA) and / or poly (ethylene terephthalate) (PET).

The second retaining element has for example a number of loops of between 10 and 100 loops per cm ² , more particularly between 10 and 90 loops per cm ² or more precisely between 30 and 70 loops per cm ² .

The ratio between the number of loops per cm ² over the number of hooks per cm ² is, for example, less than 1, or more particularly between 6% and 70%, or even more particularly between 6% and 50%.

The coating has for example a mass per unit area of between 0.04 and 30 kg / m ² , or between 1 and 30 kg / m ² , or more particularly between 2 and 24 kg / m ² , or even more particularly between 8 and 15 kg / m ² .

The invention also relates to a method of fixing a coating on a surface by means of a fixing system as defined above, in which,

- we fix the first set on the surface,

the second set is fixed on one face of the coating,

- The coating is affixed to the surface, so that the retaining elements of the first and second sets engage.

The coating fixed by such a method typically has a mass per unit area of between 1 and 30 kg / m ² , or more particularly between 2 and 24 kg / m ² , or even more particularly between 8 and 15 kg / m ² . The second assembly is typically fixed on one face of the coating, so that said face of the coating is covered with a 100%, more particularly 75%, more particularly 50%, retaining element, typically mainly in the center and on the periphery of the surface. the limit of this face of the coating.

The coating typically has a mass per unit area of between 1 and 30 kg / m ² .

PRESENTATION OF FIGURES

Other characteristics, objects and advantages of the invention will emerge from the description which follows, which is purely illustrative and nonlimiting, and which should be read with reference to the appended drawings, in which:

FIG. 1 diagrammatically illustrates an application of a system according to one aspect of the invention,

- Figures 2 to 4 are detailed views of the structure of a system according to one aspect of the invention.

In all the figures, the elements in common are identified by identical reference numerals.

DETAILED DESCRIPTION

FIG. 1 shows an example of application of a system according to one aspect of the invention, for laying a coating 2 on a surface 1, in this case a wall 1.

In the example shown, the coating 1 is a tile, for example faience, and the surface 2 is a vertical wall. However, it is understood that this example is not limiting, and that the system according to one aspect of the invention can also be used for laying a coating on a horizontal wall such as a ceiling or a wall inclined relative to the horizontal. Thus, a user is shown in this figure, which positions the tiles on a vertical wall, using a fastening system according to one aspect of the invention.

The user has already positioned three columns of tiles 2 on the surface 1, and is preparing to begin the positioning of a fourth column.

To do this, the user has fixed a first assembly 100 comprising a first retaining element 120 on a part of the surface 1 intended to receive the coating 2, and fixed a second assembly 200 comprising a second retaining element 220 on a face of the coating 2, in this case a face of the tile 2 that can be described as a rear face.

Alternatively, the fixing operations could be carried out directly in the factory, by hot rolling, gluing, or other methods, so as to reduce the total time of laying the coating on the site.

FIG. 2 shows a close-up view of the surface 1 and its first assembly 100, as well as the coating 2 and its second assembly 200.

The retaining elements 120 and 220 of the first set 100 and the second set 200 form a reversible connection, of the self-gripping type, that is to say that they engage by contacting.

In the example shown, the first retaining element 120 comprises a retaining element field comprising hooks, while the second retaining element 220 comprises a retaining element field comprising loops.

In the example shown, the surface 1 thus comprises the field of hooks, while the coating 2 presents the loops. The reverse configuration is of course also possible; the first and second sets can be arranged on the surface 1 and on the coating 2 so that the coating 2 has the hook fields while the surface 1 has the loops. The operation of the system remains unchanged. Thus, by putting the coating 2 in contact with the surface 1, the first retaining element 120 engages the second retaining element 220, so as to ensure that the coating 2 is held in position on the surface 1. The first and second assemblies 100 and 200 are configured so that the bond they form has certain properties, in particular so that the bond formed has a first displacement under the effect of gravity less than 2 mm along a first axis XI.

In the case of FIG. 1, this first axis XI is for example an axis parallel to the plane of the surface 1, for example a vertical axis, thus translating a sliding of the coating 2 on the surface 1, or a horizontal axis perpendicular to the surface 1, then translating a yawn of the coating 2 on the surface 1.

The first set 100 and the second set 200 are typically adapted to make a connection having a second displacement less than 2 mm along a second axis X 2 perpendicular to the first axis XI.

The axis XI can thus translate the sliding of the coating 2 on the surface 1 while the X2 axis translates the yawn, or vice versa. FIG. 1 shows an example of the axes XI and X2, the vertical axis XI and parallel to the surface 1 then translating the sliding under the effect of the weight of the coating 2, while the axis X 2 perpendicular to the surface 2 translated yawn. The first assembly 100 and the second assembly 200 are thus typically configured to form a connection having a slip of less than 2 mm, and a yawn less than 2 mm, or more precisely a slip of less than 1.5 mm, and a yawn less than 1.5 mm.

Thus, the coating 2 placed on the surface 1 is reliably held in position, and does not provide the user with an impression of poor installation or poorly done or unsecured.

On the other hand, the first set 100 and the second set 200 may also be adapted to provide a bond having a tensile strength of between 1.0 and 20.0 N / cm ² , in particular between 3 and 20 N / cm ^2. cm ² , even more particularly between 4 and 20 N / cm ² measured according to standard NF EN 13780.

The first assembly 100 and the second assembly 200 can also be adapted, in particular in the case of a flexible coating, so as to achieve a bond having a peel strength of between 0.05 and 5 N / cm, more particularly between 1 and 4 N / cm or preferably between 0.05 N / cm and 3 N / cm measured according to standard NF EN 12242.

The first assembly 100 and the second assembly 200 may also be adapted so as to provide a link having a perpendicular stall resistance, which is perpendicular or substantially perpendicular to the plane formed by the first set 100 or the second set 200, between 0, 1 N / cm ² and 15 N / cm ² , more particularly between 1 N / cm ² and 7 N / cm ² , even more particularly between 1.5 N / cm ² and 5.5 N / cm ² measured according to standard NF G91 -103.

FIG. 3 shows a detailed view of the structure of loops that can be used as a retaining element, and on the FIG. 4 is a detailed view of a hook that can be used as a retaining element cooperating with the loops shown in FIG. 3. The loop field shown in FIG. 3 is of the knitting type, in particular of the warp knitting type.

It thus comprises warp threads 230, and weft threads 240 perpendicular or substantially perpendicular, or in some cases inclined, to warp threads 230, these weft threads 240 and warp thread 230 thus forming a base, for example a grid , in which are knitted loops 250, by unraveling, each having two feet 255 surrounding the intersection of the warp son 230 and weft 240.

The loops 250 are here formed between two feet 255 arranged in a direction defined by the warp son 230.

The direction of the weft threads 240 thus defines the direction of the loops of the loop lines 250, arranged successively, the loops 250 being each formed by the son connecting the successive feet 255. Since the length of these wires is greater than the distance between two successive feet 255, the wires thus form a loop, thus defining an apex of the loop 250 corresponding to its furthest point of the warp 230 considered, and thus defining for each loop a loop Hb height. The orientation of the loops with respect to gravity defines the type of loop field, which may for example be of the "loops up" or "loops down" type.

This orientation is defined as a function of the position of the loop 250 relative to the warp 230 that surrounds its feet 255; if the loop 250 is above the warp 230, we speak of loops upwards, and if the loop 250 is below the warp 230, we speak of loops down, the "top" and the below "being defined with respect to gravity. In FIG. 2, the loops are thus of the type "towards the bottom ", while in Figure 3, the loops are of the" upward "type.

As indicated above, the first assembly 100 and the second assembly 200 are thus typically configured so as to form a connection having a slip of less than 2 mm, and a yawn less than 2 mm, or more precisely a slip of less than 1.5 mm , and a yawn less than 1.5 mm, these values being obtained regardless of the orientation of the loops 250, upwards or downwards.

In the case where the system is applied to a vertical surface such as a vertical wall, the loops are typically oriented downward, it being understood that depending on the applications, upward orientation of the loops may be advantageous.

The second retaining element 220 thus typically comprises a retaining element field comprising loops having a height Hb between 0.1 and 3.0 mm, in particular between 0.1 and 2.0 mm, more particularly between 0 , 4 and 1.5 mm, even more particularly between 0.5 and 1 mm, typically of the order of 0.85 mm +/- 0.25 mm.

These values are obtained by measuring the Hb height of a significant number of mouths, here 92 loops, and calculating the average value. In the case of a loop comprising several filaments, the average value of the heights of all the filaments of the considered loop will be taken into consideration. To calculate this height Hb, a rigid and transparent plate is used, for example, placed on the loops so as to flatten them, at least partly, on the weft and / or warp threads, and thus to facilitate the measurement of the height Hb. curls. The second retaining element 220 typically has a loop density of between 7 and 30 meshes per centimeter, or more particularly between 13 and 30 meshes per centimeter. The loops are typically made of polyamide (PA) or polyethylene terephthalate (PET), the son forming the loops being then for example a multifilament 44dTex 10 filaments Polyamide 6 (PA6), and the weft and warp threads being then for example a 22dTex monofilament Poly (ethylene terephthalate) (PET). The loops can also be made of polypropylene (PP).

Alternatively, the second retaining member could be other than a knitted fabric, for example, another looped fabric, a woven fabric, a nonwoven or a knitted nonwoven.

The retaining element comprising a loop field is typically bonded to a support, for example a polyolefin film, typically of low density polyethylene.

FIG. 4 diagrammatically represents an example of a hook of a field of hooks such as comprises, for example, the first retaining element 120.

The hook 130 as presented comprises a rod 140 extending from a base 150, and surmounted by a head 145.

The rod 140 as shown has a generally cylindrical shape of revolution, and has a diameter D. The rod 140 has for example a polygonal cross section, for example rectangular or substantially rectangular or square, having for example a ratio of the largest in length on the largest dimension in width strictly between 1 and 2, the length dimension extending for example according to the machine direction (commonly referred to as "MD").

The head 145 as shown has a generally concave shape, of greater maximum dimension than the diameter D of the rod 140 so as to define hooking portions 146 extending beyond the rod 140. The head 145 may for example present an oval, circular, rectangular, hexagonal, octagonal or any other projection. For each hook, a height is defined corresponding to the distance between the base 150 and its point furthest from the base, the distance from the base being measured in a direction perpendicular to this base.

The first retaining element 120 thus comprises, for example, a retaining element field comprising hooks having a height of between 0.05 mm and 1 mm.

The rod 140 has for example a diameter of between 0.05 mm and 0.80 mm, and the head 145 then has for example a height Ht between 0.01 and 0.15 mm, the height of the head Ht being the distance measured along a longitudinal axis of the rod 140, between the point of the head 145 farthest from the base 150, and the point of the head 145 closest to the base 150.

The loops 250 and the rods 140 are typically made so that the heights Hb and Ht are such that Hb / Ht> 1, or more precisely such as 2 <Hb / Ht <40, or more precisely such as 3 <Hb / Ht <30, or such as 3 <Hb / Ht <19.

The first retaining element 120 thus comprises, for example, a retaining element field comprising hooks, with a hook density of between 100 and 500 hooks per cm ² , more particularly between 110 and 500 hooks per cm ² , or more precisely between 200 and 400 hooks per cm ² , or between 250 and 350 hooks per cm ² .

The hooks are typically made of polypropylene (PP).

The second retaining element 220 typically has a number of loops of between 10 and 100 loops per cm ² , or more particularly between 10 and 90 loops per cm ² , more precisely between 30 and 70 loops per cm ² . The first retaining element 120 and the second retaining element 220 are typically made so that the ratio between the number of loops per cm ² over the number of hooks per cm ² is less than 1, more particularly between 6% and 70%. %, or even more particularly between 6% and 50%.

Such a ratio increases the probability of a loop's cooperation with several brackets.

The first set 100 and / or the second set 200 are advantageously chosen so that the mass of at least that of said sets which is fixed to the coating 2 is less than the mass of the coating 2.

The first set 100 and / or the second set 200 and typically have a weight of between 50 and 300 grams / m ² , or between 100 and 200 grams / m ² . The coating 2 typically has a mass per unit area of between 0.04 and 30 kg / m ² , or 1 and 30 kg / m ² , or between 2 and 24 kg / m ² , or more precisely between 8 and 15 kg / m ² . It can for example be a tile of 600g earthenware, dimensions 20 x 25 cm, or a mass per unit surface area equal to 12 kg / m ² .

The composition of the coating 1 typically comprises at least 30%, in particular at least 40%, more particularly at least 50%, one of the following materials: wood pulp, paper pulp, gypsum, ceramic paste, clays , porcelain, terra cotta, sandstone, PVC, polyester resin, glass, natural stone, wood, mineral matter, siliceous mineral material, or calcareous mineral matter.

The composition of the wall or support typically comprises at least 30%, in particular at least 40%, more particularly at least 50%, one of the following materials: wood pulp, paper pulp, gypsum, paste ceramic, clays, porcelain, terracotta, sandstone, PVC, polyester resin, glass, natural stone, wood, mineral matter, siliceous mineral material, or limestone mineral material. The loops typically have a thickness of between 0.1 and 0.6 mm, or more particularly between 0.3 and 0.35 mm, measured according to the standard NF EN ISO 9073-2 (0.1 KPa, 10s). The examples of hooks and loops shown are an example of retaining elements that can constitute the first set 100 and the second set 200 so as to obtain a bond having the desired characteristics.

Other types of hooks and loops can also be used.

For the use of a system as previously described for fixing a coating on a surface, a user typically performs the following steps:

one of the first set 100 or the second set is fixed on the surface 1,

the other one is fixed among the first set 100 and the second set 200 on one face of the covering 2,

the coating 2 is affixed in a single step on the surface 1, so that the retaining elements 120 and 220 of the first and second assemblies 100 and 200 engage.

During the apposition step, the applied coating is away from the adjacent coating that has been affixed previously. This separation distance can be between 0.01mm and 30mm depending on the type of coating to be affixed. In the case of a tiling of the earthenware type, the separation distance is of the order of 5 mm. The first set 100 and the second set 200 are each fixed on the surface 1 and the coating 2 for example by means of an adhesive, an adhesive, or any other suitable fastening element.

Thus, once these sets fixed, the user can easily position them and if necessary reposition them, without being bothered by the constraints related to the use of the glue. The user can easily remove the coating 1 from the surface 2, for example when it wishes to change it.

The set 100 or 200 fixed on one face of the coating 2 is typically fixed so that said face of the coating 2 is covered with a 100% retaining element, more particularly 75%, more particularly 50%, typically that the retaining elements are arranged mainly in the center and on the periphery of the limit of this face of the coating 2.

To measure the yawn of the coating on the surface of the vertical wall, the following steps are typically performed:

- Bl: It hangs (for example with an adhesive or self-gripping) an additional mass of 1kg on an outer face of the coating (opposite the face on which are arranged the retaining elements) in the center thereof.

B2: the coating 2 and the additional mass are affixed to the surface 1, so that the retaining elements 120 and 220 of the first and second assemblies 100 and 200 engage.

B3: while maintaining the coating and the additional mass in the position of step B2, measuring the distance (bi) between the coating and the vertical wall along an axis perpendicular or substantially perpendicular to the wall, this distance bi corresponds at the maximum distance between the vertical wall and the liner in this configuration.

- B4: smoothly releases the coating and the additional mass,

B5: three hours after step B4, the distance (b1) between the coating and the vertical wall is measured along an axis perpendicular or substantially perpendicular to the wall and similarly to the step

B3. This distance bl corresponds to the maximum difference between the vertical wall and the coating in this configuration. Yaw is the difference between the measurements made in steps B5 and B3, that is, bl-bi.

The measurements of steps B3 and B5 are typically performed by laser.

To measure the sliding of the coating on the surface of the vertical wall, the following steps are typically performed:

- Gl: One hangs (for example with an adhesive or a self-gripping) an additional mass of 1kg on an external face of the coating (opposite to the face on which the retaining elements are arranged), in the center of this one,

- G2: the coating 2 and the additional mass are affixed to the surface 1 (here a vertical wall), so that the retaining elements 120 and 220 of the first and second assemblies 100 and 200 engage,

G3: while maintaining the coating and the additional mass in the position of step G2, the height of the position of the coating and of the additional mass is raised in height relative to an axis parallel or substantially parallel to the vertical wall ,

- G4: smoothly release the coating and the additional mass,

- G5: three hours after step G4, measuring the new height (gl) of the position of the coating and the additional mass relative to the vertical wall along an axis parallel or substantially parallel to the wall and similarly to the step G3.

The slip corresponds to the difference between the measurements made in steps G5 and G3, ie gl-gi.

The measurements of steps G3 and G5 are typically performed by laser.

It is noted that in the examples of methods presented have common steps, and the sliding and yawning measurements can be performed simultaneously on the same sample.

It should be noted that the use of an additional mass of 1kg is only intended to reduce the time required to perform the measurements by accelerating the displacement of the coating so that the time required between steps B4 and B5 and between steps G4 and G5 is not too high, without amplifying the displacement.

Claims

claims

A system for attaching a coating (2) to a surface (1), comprising

a first assembly (100) comprising a first retaining element (120),

a second assembly (200) comprising a second retaining element (220),

the first and second retaining members (120,220) being configured to engage to effect a reversible connection,

the system being characterized in that the first retaining element (120) comprises a retaining element field comprising hooks having a height (Hc) of between 0.05 mm and 1 mm, and the second retaining element (220 ) comprises a retaining element field comprising loops having a height (Hb) of between 0.1 and 3.0 mm, so that the first set (100) and the second set (200) are adapted to making a connection having a first displacement under the effect of gravity less than 2mm along a first axis.

2. System according to claim 1, wherein the first set (100) and the second set (200) are adapted to make a connection having a second displacement less than 2 mm along a second axis perpendicular to the first axis.

3. System according to claim 2, wherein one of the axes is in a plane parallel to the plane of the surface (1), and the other of the axes is in a plane perpendicular to the plane of the surface (1).

4. System according to claim 3, wherein the first set (100) and the second set (200) are adapted to make a connection having a slip of less than 2 mm, and a yawn less than 2 mm, or more precisely a slip of less than 1.5 mm, and a yawn less than 1.5 mm.

5. System according to one of claims 1 to 4, wherein the first set (100) and the second set (200) are adapted to achieve a bond having a tensile strength of between 1.0 and 20, 0 N / cm ² , in particular between 3 and 20 N / cm ² , even more particularly between 4 and 20 N / cm ² .

6. System according to one of claims 1 to 5, wherein the retaining elements (120) of the first set (100) and the retaining elements (220) of the second set (200) are adapted so as to form a connection having a peel strength of between 0.05 and 5 N / cm, more particularly between 1 and 4 N / cm, or between 0.05 N / cm and 3 N / cm.

7. System according to one of claims 1 to 6, wherein the second retaining element (220) comprises a retaining element field comprising loops having a height (Hb) of between 0.4 and 1.5 mm. , or more particularly between 0.5 and 1 mm.

8. System according to one of claims 1 to 7, wherein the hooks comprise a rod (140) and a gripping portion (145), the gripping portion (145) having a height (Ht) between 0.01 and 0 , 15 mm, and the rod (140) having a diameter (D) of between 0.05 mm and 0.80 mm.

9. The system of claim 8, wherein the heights Hb and Ht are such that Hb / Ht> 1, or more precisely such as 2 <Hb / Ht <40, or more precisely such as 3 <Hb / Ht <30 , or such as 3 <Hb / Ht <19.

10. System according to one of claims 7 to 9, wherein the second retaining element (220) has a loop density of between 7 and 30 mesh per cm.

11. System according to one of claims 7 to 10, wherein the first retaining element (120) has a hook density of between 100 and 500 hooks per cm ² , more particularly between 110 and 500 hooks per cm ² .

12. System according to one of claims 7 to 11, wherein the hooks of the first retaining element (120) are made of polypropylene (PP), and wherein the loops of the second retaining element (220) are made of polyamide. (PA) or Poly (Ethylene Terephthalate) (PET).

13. System according to one of claims 7 to 12, wherein the second retaining element (220) has a number of loops of between 10 and 100 loops per cm ² , more particularly between 10 and 90 loops per cm ² , or more precisely between 30 and 70 loops per cm ² .

14. System according to one of claims 7 to 13, wherein the ratio between the number of loops per cm ² on the number of hooks per cm ² is less than 1, more particularly between 6% and 70%, or more particularly between 6% and 50%.

15. An assembly comprising a system according to one of claims 1 to 14, and a coating (2), wherein the coating (2) has a mass per unit area of between 1 and 30 kg / m ² , or more particularly between 2 and 24 kg / m ² , or even more particularly between 8 and 15 kg / m ² .

16. A method of fixing a coating (2) on a surface (1) by means of a fastening system according to one of claims 1 to 14, wherein,

the first set (100) is fixed on the surface (1),

the second assembly (200) is fixed on one face of the coating (2),

the coating (2) is affixed to the surface (1), so that the retaining elements (120, 220) of the first and second assemblies (100, 200) engage.

17. The method of claim 16, wherein the second assembly (200) is fixed on one side of the coating (2), so that said face of the coating (2) is covered with 100% retaining element, more particularly at 75%, more particularly at 50%, typically predominantly in the center and at the periphery of the boundary of this face of the coating (2).