DE102014107423A1 - Surface sealing element for building - Google Patents

Abstract

Described is a Flächenabdichtelement 1 for building. The Flächenabdichtelement 1 has a flat carrier 2 and a arranged on the flat support 2 and connected to the sheet-like carrier 2, openings having grating layer 3. The openings of the grid layer have a diameter of 2 mm to 30 mm. On the planar support 2, an adhesive 4 is disposed in the openings of the mesh layer 3.

Description

Technical area

The invention relates to a Flächenabdichtelement for building.

State of the art

When building structures, the problem arises of sealing the structure against ingress of moisture and water. Structures in the ground such as foundation, floor slab and entire basement area of a building must be impervious to soil moisture as well as oppressive and non-pressurized water, but also to the ingress of gas. If for the construction of the outer walls of the building precast concrete elements, such as concrete double wall elements used, then arise at the junctions between the double wall elements as well as at the junctions of double wall elements and bottom plate joints, which must be suitably sealed.

In the case of a sealing method known as "black tub", the entire outer surface of the building, which is embedded in water-bearing soil, is sealed by means of surface sealing elements on its base and on its side walls, thus sealing it in a watertight manner Surface waterproofing must be carefully laid and welded in order to prevent ingress of water.

Flächenabdichtelemente are usually attached to the in-situ concrete facing surface of the formwork wall and go after casting a solid bond with the fresh concrete. The Flächenabdichtelemente remain after stripping on the outside of the concrete area adhere and thus form a surface seal.

From the GB 2 340 070 B2 is a surface seal of a rigid plastic plate with a grid structure arranged thereon known. This surface seal is very inflexible in handling, whereby a complete sealing of eg corners is not possible. In addition, no uniform contact with the fresh concrete can be made on curved surfaces. Due to the rigid design of the plate transport to the site is much more difficult. Another disadvantage is the formation of the surface seal in the form of plates. This additional work steps are required such as the connection of the individual plates with each other and a cutting and inserting spacers to adapt to the shape of the formwork.

The EP 2 349 707 B1 discloses a surface seal consisting of a Schott layer, a composite layer and a discontinuous between composite layer and Schott layer sealing means. As a Schott layer, a flexible plastic film is used, while a felt or a nonwoven fabric is used as the composite layer. The sealant is an adhesive or hot melt adhesive. The fleece attached to the plastic film allows fresh concrete to partially penetrate. Due to the discontinuous application of the sealant, a plurality of grid cells is created, each of which is enclosed by sealant. In the case of a leak in the bulkhead, this prevents the penetration of penetrating water, since this remains trapped in the grid cell. A disadvantage of this surface seal is the fact that the film adheres very poorly to the fresh concrete due to the discontinuously applied sealant and can be removed again without much effort. By this non-solid composite and the rear safety is greatly weakened. In addition, the nonwoven generally does not bond well with the fresh concrete.

The DE 692 13 507 T2 describes a surface seal with a carrier layer, on the entire surface of a pressure-sensitive adhesive layer is applied. On the adhesive layer, a fleece is arranged, which allows the fresh concrete to penetrate far enough to form a bond with the pressure-sensitive adhesive layer. A disadvantage of this surface seal is the fact that the fleece does not form a good bond with the fresh concrete. In addition, in case of damage to the film water can accumulate and distribute between the fleece and the fresh concrete, which hindrance is not always guaranteed.

Although a variety of solutions are found in the prior art, the surface sealing of structures in the ground remains a problem. Viewed over the lifetime of a structure, even the smallest amounts of penetrating water or moisture suffice to cause a slow corrosion of the reinforcement. The sequential occurring, in its extent unpredictable structural damage form an intolerable problem in concrete.

Presentation of the invention

This is where the invention starts. It is a Flächenabdichtelement be provided for building available, which is easy to handle and ensures a secure seal of the structures against water and moisture. This task will solved according to the invention by the Flächenabdichtelement according to independent claim 1. Further advantageous aspects, details and embodiments of the invention will become apparent from the dependent claims, the description and the drawings.

The present invention provides a surface sealing member for building. The Flächenabdichtelement has a flat carrier and a arranged on the flat support and connected to the planar support, perforations having grating layer. The openings of the grid layer have a diameter of 2 mm to 30 mm. On the planar support an adhesive is arranged in the openings of the mesh layer.

The Flächenabdichtelement invention shows very excellent properties in the sealing of structures against water and gas. A watertightness could be detected up to a test pressure of 5 bar. The flat carrier prevents the penetration of gas and / or water, so it is a substantially gas- and / or waterproof flat carrier. An apertures having grating layer is arranged according to the invention on the flat support and connected thereto. On the planar support an adhesive layer is disposed in the openings of the mesh layer. Due to the minimum diameter of the perforations of the grid layer of 2 mm, fresh concrete can penetrate into the openings during casting and bond with the adhesive arranged there, resulting in an excellent seal. The maximum diameter of 30 mm for the perforations of the grid layer ensures that the grid layer has sufficient stability even with a relatively small diameter of the grating layer constituting grid elements.

The adhesive ensures a bonding of fresh concrete and flat carrier. By arranged on the flat support, perforations having grating layer a mechanical bond with the fresh concrete is ensured. The particularly good properties of the surface sealing element according to the invention are thus probably due to the fact that the Flächenabdichtelement simultaneously enters into a mechanical bond and an adhesive bond with the fresh concrete.

The perforations of the grid layer according to the invention have a diameter of 2 mm to 30 mm. The grid layer may be constructed of grating elements crossing in any manner, but may also be formed, for example, by a continuous layer with cut-outs. In principle, the present invention therefore comprises lattice layers with apertures of arbitrary shape.

In the context of the present invention, the diameter of such an opening is understood to mean the mean value of the smallest and the largest distance of two points each of which can be connected by a straight line passing through the geometrical center of gravity of the opening.

The inventively provided grid layer is preferably constructed of intersecting, rod-shaped grid elements. These rod-shaped grid elements can in principle be arranged at their intersection points in any desired manner relative to one another. For example, all the transverse grid elements may be arranged in a first plane, while all the longitudinal grid elements are arranged in a second plane. Likewise, for example, the transverse grid elements can be alternately guided over or under the longitudinal grid elements and thus form a kind of braid. In particular, in plastic grid elements, it is also possible that all transverse and all longitudinal grid elements are arranged in the same plane.

Advantageously, the bar-shaped grid elements constituting the grid layer have a biconvex shape in the section perpendicular to the grid plane and perpendicular to the main axis of the grid element. In a grid layer formed in this way, the concrete can flow behind the biconvex form of the grid elements, spread there and prevents the grid from being pulled out of the cast-in-place concrete safely and permanently after hardening. Particularly preferably, a biconvex shape having grid elements are used in the case that all transverse and all longitudinal grid elements are arranged in the same plane.

Preferably, the grid elements are arranged one above the other in two planes. In this case, the rod-shaped grid elements arranged in a common plane preferably run essentially parallel to one another. In various projections, rod-shaped grid elements arranged in different planes preferably extend at right angles to one another when viewed from above.

The rod-shaped grid elements in all embodiments have in the section perpendicular to their main axis preferably a diameter of 1 mm to 5 mm, particularly preferably from 2 mm to 3 mm.

In the case of two-level superposed rod-shaped grid elements arise above the lattice layer facing surface of the textile layer parallel to each other, extended in a longitudinal direction grid cells. Since only the grid elements arranged in a first plane are in contact with the planar carrier and the grid elements arranged in a second plane are in contact only with the grid elements arranged in the first plane, the grid cells extended in a longitudinal direction are only separated by two each Carrier adjacent, parallel to each other, rod-shaped grid elements on the one hand and limited by the flat support itself on the other. In this grid cells penetrates fresh concrete during casting, which can flow through under the grid elements of the second level, whereby the composite of Flächenabdichtelement is further reinforced with the concrete.

In the case of rod-shaped grid elements arranged in a plane, grid cells are formed above the surface of the planar carrier facing the grid layer and are open only in a direction away from the planar carrier. These grid cells are bounded in each case by four bar-shaped grid elements adjacent to the planar carrier on the one hand and by the planar carrier itself on the other hand. By this embodiment, for the preferred biconvex trained bars are used, the rear safety is advantageously further increased, since penetrating water can not leave the closed grid cell. This results in addition to the already trained backlash adhesive bond a further improvement of this property.

In all the cases described accumulates in the grid cells on the one hand a certain amount of adhesive and on the other penetrates into the grid cells fresh concrete during casting, which then forms a bond with the adhesive, whereby an excellent seal.

Due to the spatial extent of the rod-shaped grid elements arranged in two planes, a plurality of grid cells are formed above the grid carrier facing surface of the planar carrier, which are bounded by the rod-shaped grid elements adjacent to the planar carrier and by the planar carrier on the other hand. In these grid cells, in each of which there is an adhesive layer, fresh concrete can penetrate during casting, which then forms a bond with the adhesive, whereby an excellent seal.

The terms "grid layer" and "grid" are used synonymously in the context of the present text.

The Flächenabdichtelement invention has a high flexibility, whereby a winding and thereby a transport in the form of rolls are made possible. Preferably, the Flächenabdichtelement invention is wound in the form of 50 meters long and 1.25 meters to 2.0 meters wide webs on rollers, whereby the weight of a single role remains in a range that allows easy handling on the job site. Preferably, the weight of a roll should not exceed 50 kg.

The flat carrier is preferably a plastic film. A plastic film satisfies the requirement of a sufficient gas and water impermeability and advantageously has sufficient flexibility to allow rolling of the Flächenabdichtelements.

Particularly preferably, the plastic film consists of polyvinyl chloride, polyethylene, polypropylene, propylene oxide, polyurethane, in particular thermoplastic polyurethane, or a thermoplastic elastomer based on olefin. These plastics have good properties in terms of sealing, flexibility and in view of their use in the method for producing the Flächenabdichtelements according to the present invention described in more detail below.

Advantageously, the plastic film has a thickness of 300 microns to 1500 microns, more preferably from 500 microns to 800 microns. A plastic film of this thickness not only has sufficient gas and water impermeability, but also has enough flexibility to allow rolling of the Flächenabdichtelements. Moldings for corners and wall openings need not be rolled and are therefore preferably made using a plastic film having a thickness of at least 1000 microns. The connection of these moldings with adjacent Flächenabdichtelementen preferably takes place by gluing or thermal welding.

According to a particularly preferred embodiment of the present invention, the adhesive is bitumen rubber, butyl rubber, a thermoplastic, a hot melt adhesive, in particular a polyolefin-based hot melt adhesive, a dispersion adhesive, a granular adhesive or a mixture of these. The adhesives mentioned allow the use of the Flächenabdichtelements according to the present invention in a temperature range of -20 ° C to + 50 ° C, whereby the entire, conceivable for a concreting temperature range is covered.

According to a further preferred embodiment of the present invention, the grid layer consists of a plastic, in particular of a thermoplastic material. As described below, the connection of lattice and planar support is preferably carried out by flame lamination. This method can be carried out particularly easily when using thermoplastics and leads to the use of such plastics to a particularly strong and durable connection of grid and planar support. Particularly preferred in this context are polyvinyl chloride, polyethylene, polypropylene, propylene oxide, polyurethane, in particular thermoplastic polyurethane, and olefin-based thermoplastic elastomers as the material for the mesh layer.

Advantageously, the grid layer is constructed by rod-shaped grid elements. These preferably have a biconvex shape in a section perpendicular to the lattice plane and perpendicular to the main axis of the lattice element. In a grid layer formed in this way, the concrete can flow behind the biconvex form of the grid elements, spread there and prevents the grid from being pulled out of the cast-in-place concrete safely and permanently after hardening.

The perforations of the grid layer according to the invention have a diameter of 2 mm to 30 mm. As a result, when pouring fresh concrete in a sufficient amount penetrate into the openings and form a bond with the adhesive arranged there, whereby an excellent seal is achieved. Preferably, the openings of the grid layer have a diameter of 3 mm to 20 mm, more preferably from 4 mm to 15 mm and particularly preferably from 5 mm to 10 mm. Depending on the type and quality of the concrete used, a larger diameter of the perforations of the mesh layer may be advantageous for the best possible connection of the fresh concrete to the adhesive of the Flächenabdichtelements. Lattice layers with openings in the above areas allow for a sufficient penetration of fresh concrete into the openings and thus a sufficient mechanical bond of Flächenabdichtelement and concrete and provide on the other hand, a sufficient stability of the grid layer even with relatively small diameter of the grid layer-building grid elements safely.

According to a further preferred embodiment, the thickness of the grid layer perpendicular to the planar support of 1 mm to 15 mm, preferably 2 mm to 10 mm, particularly preferably 3 mm to 5 mm. On the one hand, the grating layer must have a certain minimum thickness in order to ensure sufficient mechanical stability; on the other hand, the thickness of the grating layer must not be too great, since otherwise the flexibility of the surface sealing element suffers and rolling up may no longer be possible. In the case of particularly small thicknesses of the grid layer, it is advantageous to use a grid layer arranged in two planes, in order to allow behind-running of the plane of the grid layer which is not adjacent to the planar bearer.

The thickness of the grid layer and the diameter of the openings of the grid layer can advantageously be matched to one another. Thus, it is advantageous if the thickness of the grid layer also increases with increasing diameter of the apertures, since this ensures the mechanical stability. Embodiments with a thickness of the grid layer of 1 mm to 3 mm and a diameter of the openings of 2 mm to 5 mm are therefore preferred. In addition, embodiments are preferred with a thickness of the grid layer of 10 mm to 15 mm and a diameter of the apertures of 20 mm to 30 mm. In addition, embodiments are preferred with a thickness of the grid layer of 5 mm to 10 mm and a diameter of the openings of 5 mm to 20 mm.

The present invention also encompasses a method for producing one of the surface sealing elements described above. The method comprises the steps of a) providing a planar support, b) providing a flat, perforated grating, c) connecting the flat, perforated grating with the planar support, d) applying an adhesive to the surface of the planar support facing the grating , wherein the adhesive is introduced into all openings of the grid, and e) curing of the adhesive. By this method, the Flächenabdichtelemente invention can be produced quickly, easily and inexpensively.

The connection of the flat carrier with the flat, perforations having gratings can be done in different ways. In a preferred method, the grid is heated to a temperature just below its melting point. The surface of the grid melts and the flat support can be pressed onto the grid at this elevated temperature. The re-hardening of the grid results in a firm connection of the grid and the flat carrier. The bonding of the flat carrier with the flat, openings having gratings can be done in particular by flame laminating or by thermal welding.

When applying the adhesive to the grid-facing surface of the flat support, make sure that the adhesive is in the Essentially evenly in all openings of the grid is registered. This is necessary in order to ensure a uniform connection of the Flächenabdichtelements with the in-situ concrete. According to a preferred embodiment, the adhesive is therefore registered substantially uniformly in all openings of the grid.

The melting point of the adhesive is preferably above a temperature of 70 ° C, preferably above a temperature of 80 ° C. By choosing such an adhesive, it is ensured that the rolled-up webs do not stick together during storage on the construction site when exposed to sunlight due to liquefaction of the adhesive and as a result have to be disposed of.

The application of the adhesive can be done in various ways. For example, according to a preferred embodiment, the adhesive is a granular adhesive. The application of the granular adhesive to the grid-facing surface of the sheet carrier is then carried out by scattering the granular adhesive. Particularly preferably, the spreading of the granular adhesive takes place with the aid of a sieve.

In a preferred embodiment, the granules are in a non-sticky form when applied. This can be achieved, for example, by coating sticky adhesive granules in the solid state with a fine powder of plastic, whereby the granules no longer adhere to one another. There are also other variants of the application of the plastic conceivable, which preferably provide a smooth surface of the granular adhesive. A non-sticky form of the granules allows a problem-free spreading of the granular adhesive on the grid-facing surface of the flat support.

Placing the surface seal on a vibrating table while sprinkling the granule adhesive also ensures that the granules are distributed evenly at the lowest point of the openings in the grid. In addition, it ensures that there are no granules at the top of the grille, which makes subsequent cleaning of the grate unnecessary and does not cause the surface seal to stick when rolled up.

According to a particularly preferred embodiment, the granular adhesive, in particular the non-sticky granular adhesive, is heated after application to a temperature above its melting point. This heating is preferably carried out by a radiant heater. In the case of a sticky granule adhesive melts by heating the adhesive, runs together and forms a closed adhesive layer in the openings of the grid on the flat support. In the case of a non-sticky granule adhesive coated with plastic particles, the plastic layer melting over the granules is melted by the heating, whereby the sticky granules are exposed. The adhesive then melts, runs together and forms a closed adhesive layer in the perforations of the grid on the film. The mixed in the adhesive plastic components have no or only a slight negative impact on the tackiness of the adhesive.

According to a further preferred embodiment, the adhesive is a hotmelt adhesive. In this case, the application of the hot melt adhesive to the grid-facing surface of the sheet carrier is carried out by spraying or casting, wherein the hot melt adhesive is heated to a temperature above its melting point before application.

According to a further preferred embodiment, the adhesive is a dispersion adhesive. The dispersion adhesive is applied to the surface of the planar support facing the lattice by spraying or pouring. The dispersion adhesive proceeds without further action from the grid and collects in the grid cells on the flat support to a closed adhesive layer. It is particularly easy to apply the dispersion adhesive with the aid of a spray gun.

According to a preferred embodiment, in the cases in which a hot melt adhesive or a Disperisonsklebstoff is used as adhesive, after applying the adhesive to the grid-facing surface of the flat carrier and before curing of the adhesive cleaning of the surface carrier facing away from the surface Grids performed by adhesive. The cleaning of the surface of the grid can be done by a stripper roller, which is rolled over the surface of the carrier facing away from the surface of the grid and thereby absorbs the existing adhesive. The recorded adhesive is removed by means of a scraper attached to the stripper and fed to the aufzutragendem in the openings of the grid openings adhesive. Depending on the choice of adhesive composition, the wiper roll may rotate with the running direction of the surface seal or rotate counter to it so as to absorb the adhesive.

Furthermore, the cleaning of the flat support facing away from the grid surface can also be done by a so-called air-cut method. In this case, the grid surface is removed by targeted blowing with compressed air from adhesive. The glue is running then from the grid and collects in the grid cells on the flat support to a closed adhesive layer. By cleaning the surface of the carrier facing away from the surface of the grid ensures that the Flächenabdichtelement can be rolled without further intermediate layer without unwanted bonding occur.

Subsequently, the surface sealing member is preferably wound on rollers in the form of webs 50 meters long and 1.25 meters to 2.0 meters wide, thereby keeping the weight of a single reel within a range that allows easy handling on the job site. Preferably, the weight of a roll should not exceed 50 kg.

The size of structures may require that two or more Flächenabdichtelemente in gas and / or waterproof manner put together. In order to facilitate this process, an approximately 10 cm wide adhesive bead can be provided at one edge of the Flächenabdichtelemente, which consists only of the flat support, but is not equipped with the grid layer. In the area of the adhesive joint, an adhesive application can be made by hand on the construction site. The subsequent Flächenabdichtelement can be easily adhered to this adhesive joint, which ensures a secure connection multiple Flächenabdichtelemente.

Basically, laying the Flächenabdichtelemente is also possible without overlap area, so shock to shock. For this purpose, for example, a thin, tear-resistant film is attached with adhesive surface under the shock and glued the adjacent Flächenabdichtelemente on the film. Alternatively, an adhesive tape with a butyl surface is also suitable for securely sealing the joint.

Ways to carry out the invention

The invention will be explained in more detail with reference to an embodiment in conjunction with the drawings. The 1 shows an embodiment of a Flächenabdichtelements invention 1 for building in section perpendicular to the plane of the flat carrier 2 in a schematic representation. The 2 shows the embodiment of the 1 in a plan view of the grid layer in a schematic representation.

1 shows a Flächenabdichtelement 1 with a polyethylene film 2 as an example of a flat carrier. On the polyethylene film 2 is a grid layer 3 made of thermoplastic polyurethane. The grid layer 3 has openings in which melt adhesive 4 located.

The 2 shows the embodiment of the 1 in plan view of the grid layer 3 in a schematic representation. Shown is the intersecting, rod-shaped grid elements constructed grid layer 3 , Between the individual rod-shaped grid elements is the hot melt adhesive 4 represented, which is located on the surface of the polyethylene film. The openings of the grid layer are square in the embodiment shown and have a diameter of 5 mm.

LIST OF REFERENCE NUMBERS

1

 Flächenabdichtelement

2

 polyethylene film

3

 grid layer

4

 melt adhesive

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• GB 2340070 B2 [0005]
• EP 2349707 B1 [0006]
• DE 69213507 T2 [0007]

Claims (20)

Surface sealing element ( 1 ) for building comprising a flat carrier ( 2 ), one on the flat carrier ( 2 ) and with the flat carrier ( 2 ) connected, perforations having grid layer ( 3 ), wherein the openings of the grid layer have a diameter of 2 mm to 30 mm, wherein on the flat support ( 2 ) in the openings of the grid layer ( 3 ) a glue ( 4 ) is arranged. Surface sealing element ( 1 ) according to claim 1, characterized in that it is in the flat carrier ( 2 ) is a plastic film. Surface sealing element ( 1 ) according to claim 2, characterized in that the plastic film consists of polyvinyl chloride, polyethylene, polypropylene, propylene oxide, polyurethane, in particular thermoplastic polyurethane, or a thermoplastic elastomer based on olefin. Surface sealing element ( 1 ) according to claim 3, characterized in that the plastic film ( 2 ) has a thickness of 300 microns to 1500 microns, preferably from 500 microns to 800 microns. Surface sealing element ( 1 ) according to one of claims 1 to 4, characterized in that it is in the adhesive ( 4 ) to bitumen rubber, butyl rubber, a thermoplastic, a hot melt adhesive, in particular polyolefin-based hot melt adhesive, a dispersion adhesive, a granular adhesive or mixtures thereof. Surface sealing element ( 1 ) according to one of claims 1 to 5, characterized in that the grid layer ( 3 ) consists of a plastic, in particular of a thermoplastic material. Surface sealing element ( 1 ) according to claim 6, characterized in that it is the plastic to polyvinyl chloride, polyethylene, polypropylene, propylene oxide, polyurethane, in particular thermoplastic polyurethane, or a thermoplastic elastomer based on olefin. Surface sealing element ( 1 ) according to one of claims 1 to 7, characterized in that the grid layer is constructed by rod-shaped grid elements and the rod-shaped grid elements have a biconvex shape in the section perpendicular to the lattice plane and perpendicular to the main axis of the grid element. Surface sealing element ( 1 ) according to one of claims 1 to 8, characterized in that the thickness of the grid layer is perpendicular to the flat support from 1 mm to 15 mm, preferably 2 mm to 10 mm, particularly preferably 3 mm to 5 mm. Surface sealing element ( 1 ) according to one of claims 1 to 8, characterized in that the openings of the grid layer have a diameter of 3 mm to 20 mm, preferably from 4 mm to 15 mm, particularly preferably from 5 mm to 10 mm. Method for producing a surface sealing element ( 1 ) according to claims 1 to 10 with the steps a) providing a flat carrier ( 2 ), b) providing a flat, perforated grating ( 3 ), c) connecting the flat, perforated grating ( 3 ) with the flat carrier ( 2 ), d) applying an adhesive to the grid ( 3 ) facing surface of the flat carrier ( 2 ), wherein the adhesive in all openings of the grid ( 3 ), e) hardening of the adhesive ( 4 ). A method according to claim 11, characterized in that for connecting the flat support ( 2 ) with the flat, perforated grating ( 3 ) the grid is heated to a temperature just below its melting point and the flat carrier ( 2 ) at this elevated temperature on the grid ( 3 ) is pressed. A method according to claim 11, characterized in that the bonding of the flat support ( 2 ) with the flat, perforated grating ( 3 ) by flame laminating or by thermal welding. Method according to one of claims 11 to 13, characterized in that it is the adhesive is a granular adhesive and that the application of the granular adhesive to the grid ( 3 ) facing surface of the flat carrier ( 2 ) is carried out by sprinkling the granule adhesive. A method according to claim 14, characterized in that the spreading of the granular adhesive takes place with the aid of a sieve. Method according to one of claims 14 or 15, characterized in that after the application of the granular adhesive, the granular adhesive is heated to a temperature above its melting point. Method according to one of claims 11 to 13, characterized in that it is the adhesive is a hot melt adhesive and that the application of the hot melt adhesive the grid ( 3 ) facing surface of the flat carrier ( 2 ) by spraying or pouring, wherein the hot melt adhesive is heated to a temperature above its melting point prior to application. Method according to one of claims 11 to 13, characterized in that it is the adhesive is a dispersion adhesive and that the application of the dispersion adhesive to the grid ( 3 ) facing surface of the flat carrier ( 2 ) by spraying or pouring. A method according to claim 18, characterized in that the application of the dispersion adhesive takes place with the aid of a spray gun. Method according to one of claims 17 to 19, characterized in that after step d) and before step e) the step e ₁ ) cleaning of the flat support ( 2 ) facing away from the surface of the grid ( 3 ) of adhesive ( 4 ) is carried out.

Images