EP2918747B1 - Panel with chamfer sealed using a superabsorber and method for manufacturing the same - Google Patents

Description

The invention relates to a panel, in particular for a flat installation, which has a top provided with a decor and an opposite bottom, wherein the panel has an introduced into the top chamfer or groove, and a method for producing such a panel.

From the prior art panels for a surface installation are known, in which the panel has a carrier substrate, on the upper side of which a decoration forming a decorative structure is applied. This forms a decorative side of the panel. Often, a wood-based support substrate such as a high-density fiberboard, a decorative layer and a melamine resin layer are laminated. Therefore, such panels are also referred to as laminate panels and floors made with such panels as laminate floors.

In the production of such panels a variety of design elements is used, which lead to decors with a close to nature adjustment. Here, for example, be formed by a surface structuring wood pores suitable for the illustrated decor. In addition, decors and structures are compared with each other in such a way that this imitates certain wood products and / or their processing and use state. As a result, for example, traces of use are reproduced or formed a rough sawn structural impression. Furthermore, it is customary to vary the panels in terms of their size and / or in the manner of laying so that they are as close as possible to natural products and their installation types, such as parquet, approximated.

Another design option in the production of panels is to provide them with chamfers or edges. These can produce interesting decorative effects through targeted color variation in combination with the decors. Chamfering of the panel, however, leads to a "damage" on the decorative side of the panel or the panel body. The top with the decor of the panel or panel body is referred to as a decorative side. The decor structure on the carrier substrate is made to have a high resistance to environmental influences such as water and moisture. For example, through a typically used melamine resin surface, moisture may penetrate into it underneath carrier substrate are well prevented. By chamfering, however, this seal, for example, formed by the melamine resin is damaged, so that penetration of water and moisture into the substrate is facilitated. In order to prevent or minimize this, it is customary in the prior art to reseal the surface of the chamfers formed with a sealing material after chamfering. As a rule, sealing materials based on acrylate-containing water-based paints are used. A disadvantage of these sealing materials is that these prior art chamfering sealing materials, when exposed to water for a prolonged period of time, can be at least partially dissolved so that water and moisture penetrate into the underlying substrate backing material.

Ingress of water and moisture into the substrate carrier material of a panel causes swelling of this carrier material, which can lead to tensions, breakage of individual panels, formation of elevations, etc. when laid to a floor covering.

Another problem associated with the laying of laminate floors assembled from individual panels that have been surface-treated ready for installation is that there remain fine joints between the joined panels, such as laminate flooring elements, through which the water enters the panels or can reach to the bottom of the panels. There may again come to swelling of the panels, which can severely damage or destroy the built-up of the panels floor covering and / or the individual panels. However, even if the panels are protected on their underside or backside against ingress of water and moisture into the carrier substrate material, moisture that has entered the bottom or back of the panels, especially when using a vapor barrier, may remain under the floor covering for a long time and lead there to a mold.

Although the problem of swelling of the substrate support material can be reduced by using so-called swollen materials as substrate support materials having less or no tendency to swell upon exposure to water or moisture, the problem of mold growth is not diminished.

Penetration of water through joints between the laid panels may be reduced or prevented in embodiments where the individual panels are glued together. However, this has the disadvantage that the laid panels can not be taken up again without damage and possibly re-laid.
From the DE 102005058971 A1 Jointing material is known for insertion into joints of floor coverings, wherein the jointing material comprises a superabsorbent swelling agent.
The DE 198 59 728 A1 describes water-swellable hot melt adhesives based on a tackifying resin, a water-dispersible EVA wax of an ethylene-acrylic acid ester copolymer, a water-soluble homo- or copolymers and a superabsorbent polymer powder having an average particle size of less than 80 μm. Such hot melt adhesives are suitable for securing the longitudinal water-tightness of modern cable constructions, in the construction industry as water-swelling jointing compounds in the field of building protection or building renovation. Furthermore, such hot melt adhesives are suitable for the production of absorbent textile materials in the hygiene sector.
The WO 2008 / 078181A1 describes a floor panel and its manufacture. It is provided here that a seal has a water-repellent, hydrophobic substance. One embodiment describes the use of a cured hot melt adhesive.

The DE 102 50 695 A1 describes a bottom element in which a bead of a superabsorbent swellable material is introduced into a groove along the edge of the panel below the wear layer to prevent ingress of moisture and thus swelling of the backing layer.

A use of strongly crosslinking materials as a sealing material for the surfaces of the chamfers has proven to be problematic in terms of process engineering, since components of the highly crosslinking sealing material both reached the non-chamfered surfaces of the decorative side in the case of an application with a nozzle and with a roller and not there could be removed again.

task

The invention is therefore based on the technical object of providing panels and a method for their production, which are better protected against ingress of water and moisture at their chamfers or in the area of incorporated in the decorative side grooves, wherein a production on conventional production lines for designed as a laminate panels should be possible.

Basic idea of the invention

The invention is based on the idea to add to the bevel-sealing material for the surface of the chamfer or the surface of a groove formed in the decorative side, a superabsorbent material, which is characterized in that it can absorb a multiple of its own weight of polar liquids. This means that even small amounts of this superabsorbent material are able to absorb much larger amounts of a polar liquid, in particular water or an aqueous solution. In addition, a source effect of the superabsorbent material usually occurs in addition. As a result, a matrix in which the superabsorbent material is incorporated also swells and seals the chamfer and possibly also a fine joint between profiles, provided that the joint is formed on a chamfered edge of the panel. Likewise, the invention includes the idea of such a chamfering sealing material with a superabsorbent Material also in the area of the faces or on profile elements on faces at least part of the surface applied to seal the joints resulting from the laying over the swelling effect, the joints at an entry of water or moisture. Superabsorbent material includes so-called superabsorbents, which cause the property of the superabsorbent material.

Preferred embodiments

In particular, a panel for a surface installation with a top provided with a decoration and an opposite bottom side is proposed, wherein the panel has a carrier substrate, on the substrate top side of which a decoration forming the decor is applied, wherein the panel has a chamfer on the top, wherein it is provided that a surface of the chamfer is coated with a chamfering sealing material comprising a superabsorbent material capable of absorbing a multiple of its own weight of polar liquids. The decor structure can be designed differently. As a rule, a decorative layer with one or more resin layers, for example a melamine resin, is laminated onto a carrier substrate. The decor itself can be plain, multi-colored, colorful or patterned. The decor may represent a photographic reproduction of a captured photograph or any computer-generated image or a faux of a natural material or the like. The decorative structure can also consist of one or more enamel layers, in particular clearcoat layers, which are applied to an untreated or surface-treated carrier substrate. The carrier substrate may consist of different materials. Preferably, wood-based materials are used for this, for example medium-density fiberboard or high-density fiberboard. However, other materials, such as wood / plastic composites, or materials that show little tendency to swell may also be used. However, the invention is particularly suitable for those carrier substrate materials which show a swelling tendency when exposed to liquids, in particular water or aqueous solutions. In addition to the materials mentioned, it is also possible to use mineral carrier substrates, in particular in the form of gypsum-based or cement-based plates. The material thicknesses of the plates are preferably in the thickness range between 3 mm to 30 mm. Likewise, ceramic plates can be used. When using mineral Carrier substrates, it is advantageous to use primer to improve adhesion of a decorative structure. These may be based, inter alia, on isocyanate prepolymers.

The liquid most commonly contacted by a panel, which is, for example, a floor panel, is water.

Furthermore, a method for producing a panel, in particular for a surface installation, is proposed, wherein the panel has a panel body whose upper side is provided with a decoration, comprising the steps of: producing the panel body by applying a decorative structure to a substrate top side of a carrier substrate forming a top of the panel and defining the decor of the top of the panel, inserting a chamfer or groove in the top of the panel, sealing a surface of the chamfer or groove with a chamfering sealing material, wherein it is provided that the chamfering sealing material a superabsorbent material capable of absorbing many times its own weight of polar liquids. A panel can thus be readily manufactured in a conventional manufacturing process, wherein the step of sealing the chamfer is modified by employing a suitable chamfering sealing material comprising a superabsorbent material. It is understood that the individual process steps can be carried out in different stages. For example, the method according to the invention can also be carried out on an already produced panel body, which is already finished with a decoration. The method step of producing the panel body can thus be replaced by the method step of providing a panel body with a decorative layer. The chamfered panel body coated with the chamfering sealing material containing a superabsorbent material forms the finished panel.

The formation of the chamfer takes place in panels which have a profile on the end faces, usually after forming the profile, which is formed for example in a milling process.

Panels of the type described herein can not only serve as a floor covering, but can also be used as countertops in kitchens and the like. The problem of sealing grooves or joints in areas that consist of several with one Decor structure provided panels are created there in the same way and is solved by the panels described here.

The panels can be designed and suitable both for indoor use, but also for outdoor use.

It has proved to be particularly advantageous to form the chamfer-sealing material as so-called hot-melt adhesive or hotmelt. This contains preferably in addition to a binder and color pigments which co-impress the visual impression of the surface of the chamfer. The hot melt or hot melt adhesive additionally contains the superabsorbent material which has the high tendency to absorb water and exhibits swelling associated therewith. An advantage of using a hot melt is further that it can be applied specifically to the surface of the chamfer. As a rule, however, application of the hotmelt to the surface of the chamfer is possible in such a way that no constituents of the hotmelt chamfering sealing material reach the remaining surface of the upper side of the panel.

In a hot-melt formed bevel sealing material, this is preferably applied at a temperature in the range between 80 ° C and 120 ° C. In this temperature range, application of the hot-melt bevel-sealing material is easily possible and easy to apply.

The use of a hot melt adhesive which swells with the superabsorber contained therein as soon as it comes in contact with water has the further advantage that, even if the surface of the chamfer is not fully wetted upon contact with water due to swelling properties, expansion of the chamfering sealing material and complete Sealing of the surface occurs.

A suitable application rate is 20 g / m ² ± 10 g / m ^{2 of} the hotmelt. Suitable superabsorbents, ie, superabsorbent materials, include, for example, sodium polyacrylates, phosphorylated, carbamidated starches, and carboxymethyl starch and carboxymethylguaran. At least the starch derivatives also have the advantage that they are biodegradable. Thus, there are no disposal problems when using these agents.

In one embodiment, the panels have at end surfaces between the top and the bottom profile elements, which are provided in the laying for a guide and / or locking, wherein the surfaces of the profile elements at least partially with the bevel sealing material as at the surface of the chamfer sealed or a similar sealing material, which also comprises a superabsorbent material. Advantage of these embodiments is that in a gap between the panels penetrating water, which is not closed by the chamfered on the chamfering beveled material due to the swelling, is absorbed within the joint and the corresponding surfaces of the profile elements against ingress of moisture in the Area of joints sealed and sealed. This prevents not only penetration of water from the top into the panels but also to the bottom. The occurrence of mildew under a floor covering is prevented.

It is also possible to seal the underside of the carrier substrate in the same way. This avoids possible swelling due to moisture or water acting on the panel from below. Penetration of water or moisture into the panel itself is prevented.

It has proved to be particularly advantageous immediately after the application of the bevel-sealing material to the surface of the chamfer to cool this with a fluid flow. As a result, a good adhesion of the, preferably designed as a hot melt, bevel sealing material is achieved on the surface of the chamfer. This also applies to other surfaces to which the chamfered sealing material is applied in the heated state.

It has proved to be particularly advantageous to cool the fluid via an expansion. For example, compressed air can be blown out through nozzles and a temperature reduction of up to 55 ° C can be achieved. For cooling, for example, a fluid flow generated by means of a plurality of nozzles, in particular Vortec nozzles, of 400 l / min is used. A compressed air expansion causes a simple way of cooling the fluid flow, which is preferably at least 30 ° C. Preferably, the cooling is greater, for example, is around 55 ° C.

In order to achieve decorative effects with the chamfering sealing material, the chamfering sealing material may also be colored. This allows any joint colors to be realized.

Fig. 1

eine schematische Darstellung von zwei ineinander gefügten Paneele;

Fig. 2

einen Ausschnitt einer Fuge zwischen den zwei ineinander gefügten Paneelen; und

Fig. 3

eine schematische isometrische Teilschnittdarstellung von zwei ineinander gefügten Paneelen.

The invention will be explained in more detail with reference to a drawing. Hereby show:

Fig. 1

a schematic representation of two nested panels;

Fig. 2

a section of a joint between the two nested panels; and

Fig. 3

a schematic isometric partial sectional view of two nested panels.

In Fig. 1 is a sectional view schematically represented by two similar panels 10 of a floor covering 1, which are joined together.

In Fig. 3 is a schematic isometric partial sectional view of two nested panels analogous to Fig. 1 shown schematically. The same technical features are provided in all figures with the same reference numerals.

The panels 10 each have an upper side 11. Opposite the upper side 11, the panels 10 with undersides 13 are generally laid floating on a floor or a footfall sound insulation layer applied thereto (both not shown), as a rule. In order to insert the panels 10 into each other, the panels 10 on end faces 15, 16 profile elements 17, 18 on. The profile elements 17 are in this case formed as a spring 40 on the end faces 15. On the diametrically opposite end faces 16, however, the profile elements 18 are formed as a groove 30. The profiles of the profile elements 17, 18 and groove 30 and spring 40 are formed so that the profile element 17, the spring 40, in the profile element 18, the groove 30, engages. Preferably, the groove 30 and the spring 40 are formed in terms of their profiling so that in the installed state, the in Fig. 1 and 3 is shown, the panels are locked together so that they are fixed parallel to the top 11 and bottom 13 relative to each other. This means that forces acting parallel to the top or bottom 13 on the panels 10, whose Do not change relative position to each other. Different concrete configurations of such profile elements as locking profiles are known to those skilled in the art. The embodiment shown here is merely an example embodiment.

How out Fig. 1 and 3 can be seen, a planar lateral extent of the top 11 and the bottom 13 is substantially greater than a material thickness 14 of the panel, which corresponds to the extension of the end faces 15, 16 in a spatial direction perpendicular to the top 11 and the bottom 13.

The panel 10 essentially consists of a carrier substrate 100. The carrier substrate 100 may, for example, be a high-density fiberboard (HDF plate) or a plate of another wood-based material, wood / plastic material or the like. On a substrate upper side 101, a decorative structure 110 is applied to the carrier substrate 100, which defines the decor of the panel 10 at its upper side 11. This is in Fig. 2 good to recognize the an enlarged section of the joint of the panels 10 from Fig. 1 shows. The upper side 11, on which the decorative structure 110 is arranged, is also referred to as the decorative side. The decorative structure 110 may be configured differently. As a rule, a decorative layer (not shown), which carries the graphic décor, is laminated to the carrier substrate 100 with one or more sealing layers, which are also referred to as an overlay or overlayer. A common sealing layer of the decorative structure 110 consists of a melamine resin. Panels 10, in which the decorative structure 110 is applied to a carrier substrate, are generally referred to as laminate panels, and floor coverings produced therewith are referred to as laminate floors.

In principle, other configurations of the decorative construction 110 are also possible, for example one or more printing layers and paint layers can be used.

The illustrated panels 10 each have at edges 21, 22 of the top 11 of the panel 10 chamfers or chamfers 61, 62. When these chamfers 61, 62 are formed, the surface of the substrate top side 101 protected beforehand by the decorative structure 110 is removed, so that the material of the carrier substrate 100 is not protected against environmental influences at these locations. To ensure adequate protection, For example, the surfaces 63, 64 of the chamfers 61, 62 are coated with a chamfering sealing material 200.

As in Fig. 2 can be seen, the end faces 15, 16 of the panels 10 are joined together. The substrate carrier 100 as well as the decorative structure 110 applied thereon are clearly visible. In the area of the chamfers 61, 62, this decorative structure does not protect the carrier substrates 100. Therefore, on the surfaces 63, 64 of the chamfers 61, 62, the chamfering sealing material 200 is applied, which is preferably applied as a hot melt or hot melt adhesive. The chamfering sealing material 200 is generally configured to include color pigments that determine an optical appearance of the chamfers 61, 62 adapted to a desired décor. In addition, the chamfering sealing material 200 contains binders and other additives, and in particular at least one superabsorbent material. As a superabsorbent material is considered a material capable of absorbing a polar liquid, wherein the weight or mass of the absorbed polar liquid is a multiple of the superabsorbent's own weight or a multiple of the mass of the superabsorbent material. When this superabsorbent material, which is also referred to as a superabsorbent, comes into contact with a polar liquid, in particular water or an aqueous solution, the superabsorbent material absorbs the liquid. This results in swelling of the superabsorbent material or chamfering material 200 in which the superabsorbent material is contained.

This swelling has two beneficial effects. On the one hand, it is achieved that areas of the surfaces 63, 64 of the chamfers 61, 62 which are not completely wetted during manufacture may be covered by the chamfering sealing material 200. On the other hand, by swelling the chamfering sealing material 200, it can be achieved that the inevitable small gap 70 between the panels 10 is also sealed by the swelling chamfering sealing material 200 on the chamfers 61, 62. Typical gap gaps 74 are in the range between 0.05 mm and 0.2 mm.

In Fig. 3 It can be seen that at the edges 21, 22, at which the end faces 15, 16 of the panels 10 abut one another, a so-called V-groove 70 is formed on the basis of the chamfers 61, 62. In such a joint 70 preferably water collects, both due to the use of the superabsorbent material or superabsorbers in the chamfering sealing material 200 of the surfaces 63, 64 of the chamfers 61, when the floor is entered with wet or damp shoes or wet or damp cleaning of the floor covering 1 62, due to the water absorption in the superabsorbent material and the associated swelling of the chamfering sealing material 200, both the penetration of moisture and water into the substrate carriers 100 of the panels 10 is prevented, as well as the penetration of water or moisture in the region of the gap 70 the panels 10 prevented. Thus, entry of water between the panels is inhibited except for a floor under the panels. As a result, both damage to the individual panels 10 and the entire floor covering 1 in mechanical terms as well as a possible mold formation on the underside 13 of the panels, in particular between the floor and the panels 10, prevented.

In order to allow a particularly good application of the chamfering sealing material 200 on the surfaces 63, 64 of the chamfers 61, 62, the chamfering sealing material 200 is applied in the heated state in which it has a low viscosity and very good wetting properties. To prevent delamination from the surface after wetting of the surface 63, 64 upon cooling of the chamfering sealing material 200, or because the heated chamfering sealing material 200 "runs" due to the low viscosity, in a preferred embodiment the chamfering sealing material becomes 200 immediately after application to the surfaces 63, 64, the chamfers 61, 62 with a cold fluid stream, such as a cold air stream, cooled and so fixed on the surfaces 63, 64 of the chamfers 61, 62.

example

In an exemplary embodiment, 3 mm wide chamfers have been milled in laminate panels with a panel thickness of 12 mm in total, the tops 63, 64, opposite the top of the panel 11 have an angle of 45 °. A hotmelt (HYDROLOCK NW 1120 B, from HB Fuller Europe GmbH, Zurich, as chamfering sealing material 200 was applied to the surfaces 63, 64 of the chamfers 61, 62. This hotmelt was applied to the surfaces 63 at a temperature of 100 ° C. 64 of the chamfers 61, 62. The application can with a spray unit or alternatively with an applicator roll. The application amount was 20 g ± 10 g / m ² . Immediately after application, the hotmelt was cooled by a stream of cold air from several Vortec nozzles. These generate an air flow with an air flow of about 400 l / min and cause the air to cool down by up to 55 ° C.

To test the effect of the seal, the following experiment was performed. Two panels 10 of the above example were joined together in locking installation, so that the two 45 ° bevels of the two panels joined together give a V-groove. On the top of the assembled panels was applied a ring of silicone material extending across the joint between the two panels. The silicone ring is designed so that a lateral leakage of water, which is filled in the space enclosed by the ring cavity prevented. Within a few minutes, there is a strong swelling of the hot melt deposited as chamfering sealing material 200 on the surfaces 63, 64 of the chamfers 61, 62. This results in a complete closure of the joint 70 at the bottom of the V-shaped groove. The water was left in the silicone ring for several hours. After removing the water, the substrates of the panels were examined for moisture ingress. Only very small amounts of moisture could be detected in the area of the profile elements 17, 18 of the panels 10. In a comparison test on conventionally sealed laminate floor panels of the same geometric dimensions, in which the chamfer is sealed with an acrylate-based lacquer, the entire amount of water penetrated into the panels. After the end of the experiment, a slight swelling of the chamfer itself was observed.

In addition to the use of superabsorbent materials for sealing a chamfer at the top of the panel described here, it is also possible to apply chamfered sealing material in the area of the end faces and / or profile elements in a targeted manner, even with panels which may not have a chamfer on one edge of the top have to cause a swelling of the inevitable joint in the laid state when exposed to water.

In alternative embodiments, it is additionally possible to provide panels additionally or alternatively at the bottom with a corresponding seal, which contains superabsorbent material to provide good protection against penetrating moisture in the panels.

In the illustrated embodiments, only two of the four end faces of a rectangular panel are shown in detail, respectively. It is understood by those skilled in the art that the opposing end faces, not shown, are preferably formed with profile elements, which are again each formed as a tongue and groove on opposite end faces, in particular the short end faces of the panels. As a result, a surface laying and locking of the panels in "all directions" without the use of glue or other adhesives is possible. Furthermore, the panels can be resumed non-destructive and relocated.

Although the panels shown in the example shown are each the same size. However, it is also possible to join panels together to form a floor covering whose lateral dimensions differ from one another on the top and / or bottom side, as long as the profile elements have matched dimensions on the front sides.

In the embodiments, in each case a V-groove or V-groove and associated chamfers are shown. Other embodiments may have other bevel and groove shapes, such as an L-joint.

The illustrated embodiments are merely exemplary embodiments.

LIST OF REFERENCE NUMBERS

1

flooring

10

paneling

11

top

13

bottom

14

Panel thickness

15

front

16

front

17

profile element

18

profile element

21

edge

22

edge

30

groove

40

feather

61

chamfer

62

chamfer

63

surface

64

surface

70

Gap

74

Fugenspaltmaß

100

carrier substrate

101

Substrate top

110

decorative construction

200

Bevel sealing material

Claims (15)

1. Panel (10) for flat surface laying with an upper side (11) provided with a decor and an opposing under side (13), wherein the panel (10) comprises a support substrate (100), on the substrate upper side (101) of which a decor structure (110) forming the decor is applied, wherein the panel (10) comprises a chamfer (61, 62) or a groove in the upper side (11),
   characterised in that
   a surface (63, 64) of the chamfer (61, 62) or of the groove is coated with a chamfer sealing material (200), which comprises a superabsorbing material, wherein the superabsorbing material is capable of absorbing a multiple of its own weight of polar fluids.
2. Panel (10) according to claim 1, characterised in that the chamfer sealing material (200) is configured as hot-melt, in which the superabsorbing material is contained.
3. Panel (10) according to any one of the preceding claims, characterised in that the chamfer sealing material is applied in an application quantity of 20 g/m² ± 10 g/m².
4. Panel (10) according to any one of the preceding claims, characterised in that the superabsorbing material contains one or more materials from the group which comprises sodium polyacrylates, phosphylated and carbamided starches, carboxymethyl starch and guar gum.
5. Panel (10) according to any one of the preceding claims, characterised in that profile elements (17, 18) are formed on face surfaces (15, 16) of the panel (10) between the upper side (11) and the lower side (13), which during laying are provided for guidance and interlocking, wherein surfaces of the profile elements (17, 18) and/or face surfaces (15, 16) are at least part-surface sealed with the chamfer sealing material (200) as is the surface (63, 64) of the chamfer (61, 62).
6. Panel (10) according to any one of the preceding claims, characterised in that the chamfer (61, 62) is formed at an edge (21, 22) of the upper side (11) of the panel (10).
7. Panel (10) according to any one of the preceding claims, characterised in that all the edges (21, 22) of the upper side (11) of the panel (10) are provided with the one chamfer (61) or further chamfers (62), of which the surfaces (63, 64) are sealed with the chamfer sealing material (200), which contains at least one superabsorbing material.
8. Method for producing a panel (10) for flat surface laying, wherein the panel (10) comprises a panel body of which the upper side (11) is provided with a decor, comprising the steps:

   - producing the panel body, in that a decor structure (110) is applied onto a substrate upper side (101) of a support substrate (100), which forms an upper side (11) of the panel (10) and secures the decor of the upper side (12) of the panel (10),

   - introducing a chamfer (61, 62) or groove into the upper side (12) of the panel (10),

   - sealing of an upper surface (63, 64) of the chamfer (61, 62) or of the groove with a chamfer sealing material (200),

   characterised in that
   the chamfer sealing material (200) comprises a superabsorbing material, wherein the supersabsorbing material is capable of absorbing a multiple of its own weight of polar fluids.
9. Method according to claim 8, characterised in that a hot-melt is used as chamfer sealing material (200).
10. Method according to claim 8 or 9, characterised in that the chamfer sealing material (200) is applied at a temperature in the range from 100 °C to 60 °C.
11. Method according to any one of claims 8 to 10, characterised in that the chamfer sealing material (200) is cooled after the application onto the surface (63, 64) of the chamfer (61, 62) with a fluid flow.
12. Method according to any one of claims 8 to 11, characterised in that the fluid for the fluid flow is cooled during an expansion, preferably by 30 °C to 55 °C.
13. Method according to any one of claims 8 to 12, characterised in that the chamfer sealing material is applied with a quantity of 20 g/m² ± 10 g/m²⁺.
14. Method according to any one of claims 8 to 13, characterised in that as a chamfer sealing material (200) a material is provided which contains one or more substances from the group which comprises sodium polyacyrlates, phosphorylated and carbamided starches and carboxymethyl starches and carboxymethyl guar gum.
15. Method according to any one of claims 8 to 14, characterised in that profile elements (17, 18) are introduced into face sides (15, 16) of the panel body, which are provided as guide elements and/or locking elements during laying, and surfaces of the profile elements (17, 18) and/or face sides (15, 16) are at least part-surface sealed with the chamfer sealing material (200), as is the surface (63, 64) of the chamfer (61, 62).

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