FR3125744A1 - Laminated blackout fabric, blackout having such a fabric and method of manufacturing such a laminated blackout fabric. - Google Patents

Abstract

Laminated blackout fabric, blackout having such a fabric and method of manufacturing such a laminated blackout fabric. The present invention relates to a laminated blackout fabric (1) for a motor vehicle blackout, comprising:- a first textile layer (10) having a first surface (10A) and a second surface (10B) opposite the first surface, - a second textile layer (11) having a first surface (11A) and a second surface (11B) opposite the first surface, - at least one electronic intermediate layer (12) comprising at least one electronic element (120A, 120B) housed in a hot-melt binder (121), said at least one electronic intermediate layer (12) being located between said first and second textile layers (10, 11) and being in direct contact with at least one of the second surfaces (10B, 11B) of said textile layers (10, 11).The present invention further relates to a method of manufacturing such a fabric. Figure abbreviated: [Fig.4D]

Description

Laminated blackout fabric, blackout having such a fabric and method of manufacturing such a laminated blackout fabric.

1. Technical area

The field of the invention is that of motor vehicle equipment, and in particular vehicles having a glazed surface, in particular at the level of the roof, the rear window and/or the side panels.

More specifically, the invention relates to devices designed to obscure a glazed surface, in particular requiring an occultation fabric.

2. Prior Art

Large-area bay windows in particular have become essential elements of modern motor vehicles. Embedded in the bodywork, they make it possible to offer users vehicles with a new design and a bright cabin. It is proposed, in particular, roofs of vehicles having increasingly large glass surfaces, corresponding, if necessary, to all or to an essential part of the roof.

In order to protect the occupants of the vehicle from light radiation and heat in particular, and to enable them to manage the supply of light within the passenger compartment, such roofs are equipped with concealment means, and, for example, blackout blinds. Many types of blackout blinds for glazed pavilions are known from the prior art. Blackout blinds, also called blackouts, generally comprise a blackout fabric capable of being rolled up around a roller, and of unrolling, so as to respectively uncover or cover the glazed surface of the pavilion. The end of the fabric is fixed to a pull bar, extending between two guide rails, so as to be guided in a translational movement. The pull bar drive can be manual or motorized.

The presence of increasingly large glazed surfaces therefore has the consequence of considerably reducing the surfaces of the bodywork and chassis of motor vehicles, in particular those of the roofs. However, in addition to the integration of screens, such non-glazed surfaces are usually used for the integration of electronic equipment and the passage of electrical cables for connecting such equipment. For example, the passenger compartments of vehicles are generally provided with a ceiling lighting device, also known as a reading light, providing the driver or a passenger with auxiliary lighting making it possible, for example, to consult a map or read a text. . These devices generally include one or more light sources implemented in the ceiling of the vehicle, and the driver or passenger operates a switch to turn the light source on or off. The light beam from the source is shaped (concentrated and standardized) then directed towards an expected position of the driver or passenger, generally the seats they are supposed to occupy. The presence of increasingly large glazed surfaces therefore limits in particular the space allocated to the integration and connection of such devices. Of course, lighting devices are not the only automotive equipment impacted by such integration issues.

To overcome this problem, several approaches have been proposed to reduce the size of certain automotive equipment. For example, for vehicles comprising a glazed roof, screens of the glazed surface are known which are arranged inside the passenger compartment and which comprise a screening fabric incorporating means for illuminating the passenger compartment putting implementation of light guide optical fibers. These are woven or applied to the fabric.

However, such a solution has several drawbacks.

First of all, the implementation of such light guide optical fibers stiffens the blackout fabric. This stiffening therefore disrupts the rolling up and unrolling of the blackout fabric, which is thus subject to inadvertent blockages in particular. The user who experiences such malfunctions can also involuntarily damage the blackout fabric, or even the screen as a whole, by forcing the unlocking of the blackout fabric, for example.

Furthermore, the manufacture of a blackout fabric incorporating light guide optical fibers is complex and relatively expensive.

There is therefore a need for a technical solution making it possible to overcome all or part of these drawbacks.

3. Summary of the invention

The proposed technique relates, according to a first aspect, to a laminated blackout fabric, for a motor vehicle blackout, comprising:
- a first textile layer having a first surface defining a first outer face of the blackout fabric and a second surface opposite the first surface,
- a second textile layer having a first surface defining a second outer face of the blackout fabric, opposite the first outer face of the blackout fabric, and a second surface opposite the first surface,
- at least one electronic intermediate layer comprising at least one electronic element housed in a hot-melt binder, said at least one electronic intermediate layer being located between the first and second textile layers and being in direct contact with at least one of the second surfaces of the first and second textile layers.

In other words, the hot-melt binder ensures, in addition to the positioning and maintenance of electronic elements in an intermediate or central layer, the adhesion of the latter to the two textile layers located directly against the electronic intermediate layer, called electrical sheet, on either side of it. We thus have a laminated blackout fabric with electronic functionalities, thin, therefore easily rolled up, and simple to manufacture.

The electronic elements can be electronic components connected by conductors thus forming an electronic circuit.

According to a particular embodiment, said electronic intermediate layer consists of a preform in which said at least one electronic element is embedded inside said hot-melt binder.

In other words, the electronic intermediate layer consists of at least one conductive part, called "active", and of a thermofusible protection surrounding the conductive part except, possibly, at least at one end of the latter for the coupling to an electrical power source.

According to another particular embodiment, said laminated blackout fabric comprises a plurality of electronic layers, spaced apart from each other and extending in a common plane, and at least one solid filling layer disposed in the space located between two layers consecutive emails.

The implementation of at least one such solid filling layer makes it possible in particular to give the laminated blackout fabric a constant thickness.

Advantageously, said solid filling layer is formed by a thermofusible foam.

The implementation of such an intrinsically flexible, thermofusible foam makes it possible in particular to avoid, or at least minimize, the stiffening of the laminated blackout fabric.

According to another particular embodiment, said at least one electronic element is a light source.

This allows the laminated blackout fabric to exhibit lighting functionality.

The proposed technique also relates to a motor vehicle side panel or glazed roof shield comprising a laminated blackout fabric as described above.

The proposed technique also relates to a glazed roof of a motor vehicle comprising at least one shield as described above.

The proposed technique also relates to a method for manufacturing a laminated blackout fabric as described above, said manufacturing method comprising the following steps:
- the supply of said at least one electronic intermediate layer comprising said at least one electronic element housed in said hot-melt binder,
- heating at least of said electronic intermediate layer until at least partial melting of the outer surfaces of said hot-melt binder is obtained,
- the addition of said first textile layer on a first of said outer surfaces of said hot-melt binder,
- the addition of said second textile layer on a second of said outer surfaces of said hot-melt binder, and
- the compression of said first and second textile layers against said electronic intermediate layer until infiltration of said at least partially molten hot-melt binder into the first and second textile layers so as to secure together said electronic intermediate layer with said textile layers of said canvas of stratified occultation.

The heating steps and the compression of the intermediate layer between the two textile layers thus ensure the adhesion of the intermediate layer with the two outer textile layers. The migration of the binder from the intermediate layer is controlled so as to preserve the electrical functionalities of the intermediate layer. This eliminates the need for gluing the intermediate layer to the outer textile layers.

According to a particular embodiment, said electronic intermediate layer is, prior to joining the layers of said laminated occultation fabric, in the form of a preform in which said at least one electronic element is embedded inside said hot melt binder.

4. List of Figures

Other characteristics and advantages of the invention will appear more clearly on reading the following description, given by way of a simple illustrative and non-limiting example, and the appended drawings, among which:
- : there shows, in a partially exploded perspective view, a first example of a laminated blackout fabric according to the invention;
- : there presents, in the form of a flowchart, the main stages in the manufacture of a stratified screening fabric in accordance with the proposed technique;
- : there schematically represents an example of an installation for manufacturing a laminated screening fabric according to the invention;
- , , And : Figures 4A to 4D show, in cross-sectional views, a laminated screening fabric according to the invention during various manufacturing steps;
- And : Figures 5A and 5B show, in cross-sectional views, a second example of laminated screening fabric according to the invention, before and after manufacture respectively.

5. Detailed description of the invention

5.1 General principle

The proposed technique consists of a laminated blackout fabric, for a motor vehicle blackout, having an electronic intermediate layer, formed of one or more electronic elements embedded in a hot-melt binder. This electronic intermediate layer is placed between two textile layers located on either side of it and in direct contact with the latter.

The manufacture of such a stratified occultation fabric comprises a step of partial melting of the outer surfaces of the hot-melt binder (melting occurring during the heating of the electronic intermediate layer) resulting in infiltration/migration of the partially melted hot-melt binder in the textile layers located on either side of the binder.

Once the hot-melt binder has cooled, the intermediate electronic layer is joined to the two outer textile layers, thus forming a laminated blackout fabric.

Such a use/function of the electronic intermediate layer was developed by the inventor of the present application at the cost of a complex and innovative approach which made it possible to observe that by melting the hot-melt binder of the electronic intermediate layer, and this in a controlled manner in order to guarantee the electronic functionalities of this layer, it was possible to fasten the electronic intermediate layer to the textile layers by dispensing with gluing the intermediate layer to the outer textile layers. It clearly appears that such a practice goes against the a priori of the person skilled in the art who would in no case envisage deliberately degrading the electronic intermediate layer at the risk of damaging the electronic elements which it contains.

5.2 Description of an illustrative embodiment

In the description of the figures, the elements common to the different embodiments, or versions, will be designated by the same references, while the elements varying from one embodiment to another, or from one version to another. , will be designated by a reference keeping the same numbers to which is added a prime symbol.

In this description, the terms "blackout" and "blackout blind" are synonymous, and used interchangeably.

There shows, in a partially exploded perspective view, an example of a portion of laminated blackout fabric according to the invention.

The laminated blackout fabric 1, which is intended to be implemented in a motor vehicle blackout, comprises a first textile layer 10, a second textile layer 11 and at least one electronic intermediate layer 12, also called the central layer, which is arranged between the first and second textile layers 10, 11 and secured directly thereto.

When the laminated blackout fabric 1 is unrolled, the first textile layer 10 is intended to be oriented towards the interior of the passenger compartment of the motor vehicle. The first textile layer 10 is therefore preferably made of an aesthetic material, in particular in terms of visuals and/or finishes. Preferably again, the first textile layer 10 is made of a material giving the screen fabric 1 resistance to the mechanical stresses usually subjected to it when used in a motor vehicle screen.

The second textile layer 11 is for its part intended to be oriented facing the glazed surface associated with the shield. The second textile layer 11 is therefore preferably made of a material having properties for blocking the light rays passing through the glazed surface associated with the screen and giving the screen fabric 1 resistance to the mechanical stresses usually subjected to it. when implemented in a motor vehicle shield.

The electronic intermediate layer 12 comprises one or more electronic elements. In this case, it comprises an electronic circuit 120 formed of at least one electronic component and at least one electrical conductor electrically connecting the electronic component to a source of electrical energy external to the occultation fabric 1. electronic intermediate layer 12 also comprises a hot-melt binder 121 ensuring the positioning and maintenance of the elements of the electronic circuit within the electronic intermediate layer 12.

The laminated occultation fabric 1 having to be easily rolled up, the electronic intermediate layer 12 consists of flexible elements, having reversible shape-changing capacities, in order to minimize the stiffening of the first and second textile layers 10, 11 and more generally blackout fabric 1.

According to the proposed technique, the electronic intermediate layer 12 is a preform in which the electronic circuit 120 is embedded inside the hot-melt binder 121. In other words, the electronic intermediate layer 12 is a one-piece structure produced and obtained prior to the manufacture of the stratified occultation fabric 1. Such a preform allows the electronic circuit 120 to be encapsulated in the hot-melt binder 121 thus ensuring the protection of the electronic components 120 _A and the electrical conductors 120 _B (visible in notably).

In the example shown, the laminated blackout fabric 1 consists of three layers, namely the first textile layer 10, the second textile layer 11 and the electronic intermediate layer 12 placed between these two textile layers 10, 11.

The first textile layer 10, also called the appearance textile layer, is made of a thermostable polymer. More specifically, the first textile layer 10 is made of polyethersulfone (PES), that is to say a material that can be worked so as to give an aesthetic appearance to the occultation fabric 1. Such a material also makes it possible to contributing to the blackout aspect of the blackout fabric 1 as well as to its mechanical strength and/or flammability resistance.

For example, for a first textile layer made of PES and having a thickness of between 350 μm and 600 μm, this first textile layer has an opacity of between 90% (if perforated layer) and 100% (if solid layer), resistance to tear of at least 10N, a flammability lower than 100mm/min. Such a first textile layer 10 also has low dimensional stability, namely between +/- 1.5%, and, for an elongation under 20N, an elongation of less than 20%, preferably less than 15%, along its axis. longitudinal, and an elongation of less than 15%, preferably less than 10%, along an axis transverse to the longitudinal axis.

The first textile layer 10 has a first surface 10 _A , defining a first outer face of the blackout fabric 1, and a second surface 10 _B , opposite the first surface 10 _A , forming the assembly surface of the first layer textile 10 with the electronic intermediate layer 12.

The second textile layer 11, also called the bottom textile layer, is made of polyethersulfone (PES), that is to say of a material with high concealment and mechanical strength capabilities.

The second textile layer 11, being devoid of aesthetic patterns, generally has a thickness less than that of the first textile layer 10. For example, the thickness of the second textile layer 11 may be between 150 μm and 300 μm.

The second textile layer 11 has a first surface 11 _A , defining a second outer face of the blackout fabric 1, and a second surface 11 _B , opposite the first surface 11 _A , forming the assembly surface of the second layer textile 11 with the electronic intermediate layer 12.

In this example, the flexible electronic components of the electronic intermediate layer 12, whose structure is more visible in , are light-emitting devices 120 _A , such as light-emitting diodes (LEDs), which make it possible to give the laminated blackout fabric 1 a lighting functionality. Of course, other electronic components having reversible shape change capabilities can be incorporated depending on the functionality or functions that the electronic intermediate layer 12 must provide to the laminated occultation fabric 1.

The conductors of the electronic circuit can be made of silver, gold, copper or aluminum.

The electronic circuit 120, having a thickness of 100 μm, comprises a plurality of flexible light-emitting devices 120 _A and flexible electrical conductors 120 _B. The electronic circuit 120 is completely housed inside the hot-melt binder 121.

The hot-melt binder 121 used to ensure the positioning and protection of the electronic circuit 120 by coating the latter, is polyurethane (PU) and may contain one or more additives.

The hot-melt binder layer 121 has, in the example shown, a thickness of 35 μm on either side of the electronic circuit having a thickness of 100 μm. Thus, the electronic intermediate layer 12 has a total thickness of 170 μm. Of course, the thickness of the hot-melt binder layer can vary, depending on the thickness of the electronic circuit and/or the textile layers in particular, between 30 μm and 50 μm on either side of the electronic circuit.

Thus, the hot-melt binder 121 defines a first outer surface 121 _A of the electronic intermediate layer 12, forming a first assembly surface of the electronic intermediate layer 12 with one of the two textile layers, and a second outer surface 121 _B , opposite to the first outer surface 121 _A , forming a second assembly surface of this same electronic intermediate layer 12 with the other of the two textile layers.

The electronic intermediate layer 12 is therefore located between the first and second textile layers 10, 11, and in direct contact therewith. More specifically, the assembly surface 10 _B of the first textile layer 10 is secured to the first assembly surface 121 _A of the intermediate electronic layer 12 and the assembly surface 11 _B of the second textile layer 11 is secured to the second assembly surface 121 _B of the electronic intermediate layer 12. In other words, no additional sizing layer is present between the electronic intermediate layer 12 and each of the first and second textile layers 10, 11. These textile layers are therefore in direct contact with the intermediate layer.

We now present in relation to Figures 2 to 4D the manufacturing steps of the laminated occultation fabric described above.

The organization chart of the presents the main steps in the manufacture of the laminated blackout fabric. There represents an example of an installation comprising technical means for the implementation of the main stages of the flowchart of the . Finally, FIGS. 4A to 4D illustrate certain stages in the manufacture of the laminated blackout fabric, for a better understanding of the proposed technique.

During a first step, referenced S1, the preformed electronic intermediate layer 12, in which the electronic circuit 120 is arranged inside the hot-melt binder 121, is brought into the installation.

To do this, the manufacturing installation 2 comprises a first roller 22, driven in rotation by a drive motor (not shown), gradually moving the electronic intermediate layer 12.

During a second step, referenced S2, the electronic intermediate layer 12 is heated until the first and second outer surfaces 121 _A , 121 _B of the hot-melt binder 121 are partially melted, as illustrated in .

To do this, the manufacturing installation 2 comprises heating units 23, located on either side of the electronic intermediate layer 12 and having heating parts oriented towards the first and second outer surfaces 121 _A , 121 _B of the binder hot melt 121.

The heating units 23 include means for adjusting the temperature of the heating parts in order to control the partial melting of the first and second outer surfaces 121 _A , 121 _B of the hot-melt binder 121 so as not to damage the electronic circuit 120.

For example, for an electronic intermediate layer 12 having a total thickness of 170 μm and comprising an electronic circuit 120 with a thickness of 100 μm coated in a hot-melt binder 121 made of PU, heating of the first and second external surfaces 121 _A , 121 _B hot-melt binder 121 at a temperature of between 30°C to 200°C for a predetermined time (depending on the selected heating temperature) allows partial melting of the outer surfaces 121 _A , 121 _B of the electronic intermediate layer 12, and this while guaranteeing the proper functioning of the electronic circuit 120. It can alternatively be envisaged to carry out a total melting of the hot-melt binder since this does not deteriorate the operation of the electronic circuit.

During a third step, referenced S3, the first textile layer 10 is added to the electronic intermediate layer 12 by gradually bringing the assembly surface 10 _B of the first textile layer 10 onto the first assembly surface 121 _A of the electronic intermediate layer 12, that is to say on a first of the partially melted outer surfaces of the hot-melt binder 121.

During a fourth step, referenced S4, the second textile layer 11 is added to the electronic intermediate layer 12 by gradually bringing the assembly surface 11 _B of the second textile layer 1 onto the second assembly surface 121 _B of the electronic intermediate layer 12, that is to say on a second of the partially melted outer surfaces of the hot-melt binder 121.

In manufacturing plant 2 of the , the third and fourth steps S3, S4 are carried out simultaneously.

To do this, the manufacturing installation 2 comprises a second roller 20 for adding the first textile layer 10 to the electronic intermediate layer 12 and a third roller 21, located above and opposite the second roller 20, to addition of the second textile layer 11 to the electronic intermediate layer 12. The addition of the first and second textile layers 10, 11 is carried out by simultaneously causing, via drive motors (not shown), the rotation of the second and third rollers 20, 21 in opposite directions, represented by arrows on the .

During a fifth step, referenced S5, the first and second textile layers 10, 11 are compressed against the electronic intermediate layer 12 so that the partially molten hot-melt binder 121 infiltrates and penetrates into the first and second textile layers 10 , 11, thus ensuring the interlocking of the layers of the laminated occultation fabric 1, as illustrated in , once the assembly has cooled.

To do this, compression is applied to all of the three layers of the laminated occultation fabric 1. Such compression is obtained, on the one hand, by a first pressure force F _20/10 exerted by the second roller 20 on the first textile layer 10 and, on the other hand, by a second pressure force F _21/11 , directed towards the first pressing force F _20/10 , exerted by the third roller 21 on the second textile layer 11. The first and second pressing forces F _20/10 , F _21/11 are applied uniformly.

A cooling step is then implemented. When the laminated blackout fabric 1 is obtained, it has the properties of the different layers constituting it.

In other words, the installation for manufacturing a laminated blackout fabric in accordance with the invention consists of:
- supply means, such as a first roller driven in rotation, of the electronic intermediate layer comprising the electronic circuit housed/embedded in the hot-melt binder,

- heating means, such as a radiation heating unit, of the electronic intermediate layer until partial melting of the outer surfaces of the hot-melt binder is obtained,
- means for supplying/adding the first textile layer on a first of the outer surfaces of the hot-melt binder, such as a second roller driven in rotation,
- means for supplying/adding the second textile layer to a second of the outer surfaces of the hot-melt binder, such as a third roller driven in rotation, and
- compression means, such as rolls or trays, of the first and second textile layers against the electronic intermediate layer until the partially molten hot-melt binder has infiltrated the first and second textile layers so as to form the laminated blackout fabric .

The heating steps and the compression of the intermediate layer between the two textile layers thus ensure the adhesion of the intermediate layer with the two outer textile layers. The migration of the binder from the intermediate layer is controlled so as to preserve the electrical functionalities of the intermediate layer ( ).

It can therefore be seen that a stratified occultation fabric according to the invention is obtained via a manufacturing process akin to complexing without any step of adding/coating adhesive on the external faces of the electronic intermediate layer. This therefore makes it possible to simplify the structure of an installation for manufacturing laminated blackout fabric by doing away with storage tanks and adhesive spray nozzles in particular.

In general, the operating parameters of the manufacturing installation, such as the heating temperature, the heating time and the layer compression force, are determined according to materials and/or dimensions of the electronic layers and textiles which themselves depend on the desired properties (aesthetic appearance, thickness, mechanical resistance, electronic functionality, etc.) of the laminated blackout fabric. However, a point common to the various possible combinations is that the force necessary to separate the layers of a laminated blackout fabric in accordance with the proposed technique must be greater than 10N, preferably greater than 20N, for a fabric having a total thickness between 500μm and 900μm.

FIGS. 5A and 5B are two cross-sectional views of a second example of laminated blackout fabric, in accordance with the invention, illustrating the positioning of various elements of the front blackout fabric ( ) and after ( ) their assembly.

This second example of laminated blackout fabric differs from the first example by the presence, between the two outer textile layers, of a plurality of electronic intermediate layers spaced in the same plane and by the presence of a solid filling layer located between the electronic interlayers. Such a solid filler layer is configured to compensate for the thickness of the electronic interlayers so that the laminated blackout fabric has a constant and uniform thickness along its length.

As illustrated, the laminated occultation fabric 1′ comprises the first textile layer 10, the second textile layer 11 and, between the first and second textile layers 11, two identical electronic intermediate layers 12 spaced apart from each other. and located in a common plane (not shown) parallel to the plane of the textile layers.

The laminated occultation fabric 1' further comprises a filling layer 13 located between the two intermediate electronic layers 12. The filling layer 13 is a solid layer having reversible shape-changing capabilities, such as a foam, and composed of a thermofusible material. Preferably, the hot-melt foam is composed of the same material as the hot-melt binder of the electronic intermediate layers 12.

The electronic intermediate layers 12 and the solid thermofusible layer 13 are formed in such a way that, after manufacture, the laminated occultation fabric 1' has a constant and homogeneous thickness.

The method of manufacturing such a laminated occultation fabric 1′ therefore comprises an additional step of providing, in the space located between two consecutive electronic intermediate layers, the filling layer 13.

The installation for manufacturing such a stratified screening fabric 1′ therefore comprises, upstream of the heating units, means for supplying the filling layer 13.

5.3 Other embodiments and alternatives

In the example shown, the first textile layer is made of polyethersulfone (PES). Nevertheless, any other material, preferably thermostable polymer, having such characteristics, such as polysulfone (PSU) or polyphenylene ether (PPE), may alternatively be considered for producing this first textile layer. It can also be envisaged to produce the first textile layer via a mixture of several polymers. For example, by a combination of polyurethane and polyester to form a woven artificial leather called alcantara (registered trademark).

In the example shown, the second textile layer is made of polyethersulfone (PES). However, any other material, preferably thermostable polymer, having such characteristics, such as polyethylene terephthalate (PET), may alternatively be considered for producing this second textile layer.

In the example shown, the hot melt binder is polyurethane (PU). However, one or more polyurethane derivatives, such as TPU or PUR, can alternatively be considered as a hot-melt binder. Alternatively, a hot-melt binder of another nature may also be considered.

Obviously, the invention is not limited to the embodiments and variants described above and provided solely by way of example. It encompasses various modifications, alternative forms and other variants that a person skilled in the art may consider in the context of the present invention and in particular all combinations of the various modes of operation described above, which may be taken separately or in combination.

In this sense, for example, if the laminated occultation fabric comprises a single electronic intermediate layer, two solid filling layers can be arranged on either side of this electronic intermediate layer In the plane of the latter.

According to another example, if the laminated occultation fabric comprises several electronic intermediate layers arranged in the same plane and of different thicknesses, a solid filling layer may be arranged on and/or under the least thick electronic intermediate layer or layers. so as to achieve the thickness of the thickest electronic intermediate layer. The fabric thus has a constant thickness.

More generally, the proposed technique covers all the implementations of the principle according to which a laminated blackout fabric is obtained by joining together the two outer textile layers at least in part via the hot-melt binder of the electronic intermediate layer, i.e. ie by partial migration of the hot-melt binder. The proposed technique also covers all the processes and installations allowing the manufacture of such a canvas.

The solution of the proposed technique thus makes it possible, according to the embodiments, to have a stratified screening fabric having a reduced thickness (by doing away with, as far as possible, additional layers of hot-melt adhesive).

The blackout fabric can be used in a screen for a glass roof (opening or fixed panoramic roof) or for a side or rear window (mobile or fixed) of a motor vehicle.

According to various aspects, the proposed technique therefore has all or part of the following advantages, depending on the embodiments and/or variants selected:
- minimize the thickness of an occultation fabric presenting electronic functionalities (lighting of the passenger compartment in particular),
- ensure easy rolling of the fabric in a vehicle screen;
- guarantee a homogeneous and constant thickness of the fabric;
- guarantee simplified manufacturing;
- limit manufacturing costs;
- guarantee a significant longevity;
- guarantee concealment;
- etc.

Claims (9)

Laminated blackout fabric (1), for motor vehicle blackout, comprising:
- a first textile layer (10) having a first surface (10 _A ) defining a first outer face of said screening fabric and a second surface (10 _B ) opposite the first surface,
- a second textile layer (11) having a first surface (11 _A ) defining a second outer face of said occultation fabric, opposite to said first outer face of said occultation fabric, and a second surface (11 _B ) opposite at the first surface,
- at least one electronic intermediate layer (12) comprising at least one electronic element (120A, 120B) housed in a hot-melt binder (121), said at least one electronic intermediate layer (12) being located between said first and second textile layers ( 10, 11) and being in direct contact with at least one of the second surfaces (10 _B , 11 _B ) of said first and second textile layers (10, 11). Blackout fabric (1) laminated according to claim 1, characterized in that said electronic intermediate layer (12) consists of a preform in which said at least one electronic element (120A, 120B) is embedded inside said hot melt binder (121). Blackout fabric (1) laminated according to either of Claims 1 and 2, characterized in that it comprises a plurality of electronic layers (12), spaced apart from one another and extending in a common plane, and at least a solid filling layer (13) arranged in the space located between two consecutive electronic layers (12). Laminated blackout fabric (1) according to Claim 3, characterized in that the said solid filling layer (13) is formed by a thermofusible foam. Blackout fabric (1) laminated according to any one of Claims 1 to 4, characterized in that the said at least one electronic element (120A, 120B) is a light source. Blackout for the side panel or glazed roof of a motor vehicle comprising a blackout fabric (1) laminated according to any one of Claims 1 to 5. Motor vehicle glazed roof comprising at least one shield according to claim 6. Method of manufacturing a laminated occultation fabric (1) according to any one of claims 1 to 5 comprising the following steps:
- the provision of said at least one electronic intermediate layer (12) comprising said at least one electronic element (120A, 120B) housed in said hot-melt binder (121),
- heating at least of said electronic intermediate layer (12) until at least partial melting of the outer surfaces (121 _A , 121 _B ) of said hot-melt binder (121) is obtained,
- the addition of said first textile layer (10) on a first of said outer surfaces (121 _A , 121 _B ) of said hot-melt binder (121),
- the addition of said second textile layer (11) on a second of said outer surfaces (121 _A , 121 _B ) of said hot-melt binder (121), and
- the compression of said first and second textile layers (10, 11) against said electronic intermediate layer (12) until infiltration of said at least partially molten hot-melt binder (121) into the first and second textile layers (10, 11) so in securing together said electronic intermediate layer (12) with said textile layers of said laminated blackout fabric (1). Process for the manufacture of a stratified occultation fabric (1) according to claim 8, characterized in that the said electronic intermediate layer (12) is presented, prior to the joining of the layers of the said stratified occultation fabric (1), in the form of a preform in which said at least one electronic element (120A, 120B) is embedded inside said hot-melt binder (121).