Building panel

Abstract

A building panel comprising a first mechanical locking system at respective parallel and opposite third and fourth edges (13, 14), such as long sides, configured to cooperate, preferably by folding movement, for horizontal and vertical locking between two adjacent building panels (10, 20). The panel further comprises a second locking system at respective parallel and opposite first and second edges (11, 12), such as short sides, configured to cooperate for horizontal and vertical locking of two adjacent building panels (10, 30). One of the third or fourth edges (13, 14) comprises a first lower lip (139) configured to mate with a first upper lip (149) of an upper edge portion of the other of the third and fourth edges of an adjacent panel (20) when the third and fourth edges are arranged in locked engagement.

Description

[0001] This application is a divisional application of the patent application for invention with the application date of January 9, 2020, application number 202080065413.1, and invention name "Building Panel". Technical Field

[0002] The present disclosure generally relates to the field of building panels. Background Art

[0003] Composite floors typically include a core made of 6-12 mm fiberboard, an upper decorative surface layer made of laminate with a thickness of 0.2-0.8 mm, and a lower balancing layer made of laminate, plastic, paper, or similar material with a thickness of 0.1-0.6 mm. The laminate surface includes melamine-impregnated paper. The most common core material is fiberboard with high density and good stability, commonly known as HDF - High Density Fiberboard. Sometimes, MDF - Medium Density Fiberboard - is also used as the core.

[0004] This type of laminated floor panel has been mechanically joined by means of a so-called mechanical locking system. These systems include locking devices that lock the panels horizontally and vertically. The mechanical locking system is usually formed by processing the core of the panel. Alternatively, some parts of the locking system can be formed from a separate material such as aluminum or HDF, which are integrated with the floor panel, i.e., joined to the floor panel during the manufacturing process of the floor panel.

[0005] The main advantage of floating floors with a mechanical locking system is that they are easy to install. They can also be easily removed again and reused in different locations. However, the known systems have drawbacks, for example, in terms of moisture control. Therefore, there is room for improvement in this technical field. Summary of the Invention

[0006] The general objective of the present disclosure is to provide a building panel that helps to improve the control of moisture (such as water). The improved moisture control can include, but is not limited to, improving the seal between assembled building panels and increasing the resistance to water penetration through the surface including assembled building panels.

[0007] Another objective is to provide a building panel that facilitates the alignment of such assembled building panels.

[0008] Therefore, another objective of the present invention is to provide a building panel that helps to improve the moisture control of a paving layer of building panels such as floating floors. In particular, an objective is to provide a building panel for improving moisture control and / or at least reducing the possibility of water penetration through a T-shaped joint of such a floor paving layer.

[0009] The above objects of the embodiments of the present invention can be fully or partially achieved by a locking system and floor panels according to the present disclosure. The embodiments of the present invention are apparent from the specification and the drawings.

[0010] Definitions of some terms

[0011] Hereinafter, the visible surface of an installed floor panel is referred to as the "front surface", and the opposite side of the floor panel facing the underlying floor is referred to as the "back surface". A "horizontal plane" means a plane parallel to the front. The directly adjacent upper parts of two adjacent joint edges of two joined floor panels together define a "vertical plane" perpendicular to the horizontal plane. The outer part of the floor panel at the edge of the floor panel located between the front surface and the back surface is referred to as the "joint edge". Generally, the joint edge has a plurality of "joint surfaces", which can be vertical, horizontal, angled, rounded, chamfered / beveled, etc. These joint surfaces are present on different materials, such as laminate, fiberboard, wood, plastic, metal (especially aluminum) or sealing material.

[0012] "Vertical locking" means locking parallel to the vertical plane. "Horizontal locking" means locking parallel to the horizontal plane.

[0013] "Upward" means towards the front surface, "downward" means towards the back surface, "inward" is mainly horizontally towards the inner central part of the panel, and "outward" mainly means horizontally away from the central part of the panel.

[0014] "Locking" or "locking system" means a cooperative connecting device that connects floor panels vertically and / or horizontally to each other. A "mechanical locking system" means locking without glue. In many cases, a mechanical locking system can also be joined by glue.

[0015] A "decorative surface layer" means a surface layer mainly intended to give the floor a decorative appearance. A "wear-resistant surface layer" means a highly wear-resistant surface layer, which is mainly suitable for improving the durability of the front. It follows therefrom that a "decorative wear-resistant surface layer" is a layer intended to give the floor a decorative appearance and improve the durability of the front. The surface layer is usually applied to the core.

[0016] Embodiments of the present invention are particularly applicable to floating floors formed by the following floor panels: the floor panels are mechanically connected using a locking system integrated with (i.e., factory-installed) the floor panels and consist of one or more upper layers made of wood or wood veneer, decorative laminate, powder-based surface, or decorative plastic material, an intermediate core made of wood fiber-based material or plastic material, and preferably a lower balancing layer on the back of the core. Also included are solid wood floor panels, or floor panels having a surface layer made of cork, linoleum, rubber, or a soft wear layer - such as needle-punched felt glued to the board - floor panels having a printed and preferably also varnished surface, and floor panels having a hard surface such as stone, tile, and similar materials.

[0017] Therefore, by way of non-limiting example, the following description of the prior art, the problems of known systems, and the objects and features of embodiments of the present invention will first be directed to this field of application, in particular to panels formed as rectangular floor panels having long and short sides, the rectangular floor panels being intended to be mechanically joined to one another on both the long and short sides.

[0018] The long and short sides are mainly used to simplify the description of embodiments of the present invention. The panels can be square. It should be emphasized that embodiments of the present invention can be used in any floor panel, and it can be combined with all types of known locking systems formed on the long and / or short sides, where the floor panels are intended to be joined using a mechanical locking system that connects these panels in the horizontal and / or vertical directions on at least two adjacent edges.

[0019] In one aspect of the present invention, a set of similar or substantially identical building panels, such as floor panels or wall panels, is provided. These panels include a first mechanical locking system located at corresponding parallel and opposite third and fourth edges, which are the long edges of the panel. The first mechanical locking system includes a locking groove at the third edge, which is configured to receive a first locking tongue of the fourth edge of an adjacent panel by means of a folding displacement of the adjacent panel to achieve vertical locking between two adjacent building panels. A second locking system is located at corresponding parallel and opposite first and second edges, such as the short edges of the panel. The second locking system is configured to cooperate preferably by means of a vertical movement, such as a vertical fold, for horizontal and vertical locking of two adjacent building panels. The upper edge portion of one of the third or fourth edges (preferably the third edge) includes a first lower lip, which is configured to cooperate with the upper edge portion of the other of the third and fourth edges of the adjacent panel when the third and fourth edges are assembled in the locked position. The first upper lip of the fourth edge is configured to form a tight fit around the first lower lip when the first lower lip is received below the first upper lip in response to the folding displacement. Further advantages and embodiments are set forth in the appended dependent claims and detailed description. Description of the Drawings

[0020] The present disclosure will be described in more detail below in connection with exemplary embodiments and with reference to the accompanying schematic drawings, in which:

[0021] Figure 1 A schematic illustration of a floor panel including a locking system according to the prior art is shown.

[0022] Figure 2 It is shown that Figure 1 a floor panel of is in a locked position with an adjacent building panel.

[0023] Figure 3 A schematic illustration of another floor panel assembled to the floor panel of by means of a vertical movement (vertical fold) is shown. Figure 2 is shown.

[0024] Figures 4A - 4B A schematic illustration of a cross-sectional view of a locking system according to the prior art is shown.

[0025] Figures 5A - 5C A schematic illustration of a locking system according to an embodiment of the present invention is shown.

[0026] Figure 6 A schematic cross-sectional view of a first locking system according to an embodiment of the present invention at the A-A cross-section of is shown. Figure 5A is shown.

[0027] Figure 7 Shows a schematic cross-sectional view of a second locking system according to an embodiment of the present invention at Figure 5C the B-B cross-section of

[0028] Figure 8 Is a schematic cross-sectional view of a first locking system according to an embodiment assembled into a wall at Figure 12 the C-C cross-section of

[0029] Figure 9 Is a schematic cross-sectional view of a first locking system according to an embodiment assembled into a wall at Figure 12 the D-D cross-section of

[0030] Figure 10 Shows a schematic illustration of a second locking system assembled by vertical movement according to an embodiment.

[0031] Figure 11 Shows Figure 10 another schematic illustration of the second locking system assembled by vertical movement of

[0032] Figure 12 Is a schematic illustration of an exemplary embodiment assembled into a wall.

[0033] Figure 13 Is a schematic illustration of an exemplary embodiment assembled into a floor.

[0034] Figures 14A - 14B Shows a cross-sectional view of a panel including a pocket according to an embodiment.

[0035] Figures 15A - 15B Shows a cross-sectional view of a panel including a pocket according to an embodiment.

[0036] Figures 16A - 16B Shows a cross-sectional view of a panel including a pocket according to an embodiment.

[0037] Figures 17A - 17B Shows a cross-sectional view of a panel including a pocket according to an embodiment.

[0038] Figures 18A - 18B Shows a cross-sectional view of a panel including a pocket according to an embodiment.

[0039] Figures 19A - 19B Shows a cross-sectional view of a panel including a pocket according to an embodiment.

[0040] Figure 20A Shows a panel according to an embodiment, the panel including a corresponding lower lip portion disposed in a displacement plane.

[0041] Figure 20B shows a cross-sectional view of the first and second edges of two assembled panels according to Figure 20A an embodiment.

[0042] Figure 20C shows a cross-sectional view of the third and fourth edges of two assembled panels according to Figure 20A an embodiment. DETAILED DESCRIPTION

[0043] Embodiments of the present disclosure will now be described with reference to the accompanying schematic drawings. It should be emphasized that combinations of embodiments can be used to achieve improved or different functions.

[0044] All embodiments can be used alone or in combination. Angles, dimensions, rounded portions, spaces between surfaces, etc. are merely examples and can be adjusted within the basic principles of the invention.

[0045] Figure 1 A known building panel including a mechanical locking system is shown in

[0046] The mechanical locking system generally includes tongues and tongue grooves for vertical locking and locking elements and locking grooves for horizontal locking. It typically has at least four pairs of actively cooperating locking surfaces, two pairs for vertical locking and two pairs for horizontal locking. The locking system includes a plurality of other surfaces that generally do not contact each other and can therefore be produced with much larger tolerances than the cooperating locking surfaces.

[0047] A laminated floor generally consists of a core made of fiberboard with a thickness of 6 - 9 mm, an upper surface layer with a thickness of 0.20 mm, and a lower balancing layer. The surface layer provides the appearance and durability of the floor panel. When the relative humidity (RH) changes during the year, the core provides stability and the balancing layer keeps the panel level.

[0048] Figure 4A shows a typical first mechanical locking system (bar lock) according to the prior art, which can utilize angling locking (see Figure 3 ) and is widely used in the market, especially for assembling the corresponding long edges of the panels with each other. Figure 4AShows a vertical section of a floor panel, showing a part of the long side 13' of the floor panel 20' and a part of the long side 14' of the floor panel 10'. The main body of the floor panels 10' and 20' can consist of a fiberboard body or core that supports a wear-resistant and decorative surface layer on its front side here and a balancing layer on its back side (lower side). The locking system has a tongue 14h' and a tongue groove 13j', and the tongue groove 13j' locks the panel in the vertical direction V by means of an upper tongue surface 53 and a lower tongue surface 56 that cooperate with an upper tongue groove surface 43 and a lower tongue groove surface 46. The locking bar 13a' is formed by the main body and supports the locking element 13b'. Thus, the locking bar 13a' and the locking element 13b' to some extent constitute an extension of the lower part of the tongue groove 13j'. The locking element 13b' formed on the bar 13a' has an operative locking element surface 13m', and the operative locking element surface 13m' cooperates with an operative locking groove surface 14m' in the locking groove 14g' in the opposite locking groove side of the floor panel 10'. By the engagement between the horizontal operative locking surfaces 13m' and 14m', horizontal locking of the floor panels 10' and 20' is obtained transversely to the joint edge when the panels are pulled apart.

[0049] Figure 4B The known second locking system shown can also be formed with a flexible tongue 11i' (folding lock) that is typically used at the short sides 11' and 12' as shown, which can be displaced during locking. Such a locking system can be locked by vertical movement as shown, where the first edge 11' of the panel 10' is assembled to the second edge 12' of the panel 30' by vertical movement. Figure 4B The displaceable tongue 11i' is configured to cooperate with a second tongue groove 12j' to lock in the vertical direction. The displaceable tongue 11i' is a separate component and is made of, for example, plastic, and is inserted into a displacement groove 11k' at the first edge 11' of the first panel 10'. During the vertical assembly of the first and second edges of the first and second panels, the tongue 11i' is pushed into the displacement groove 11k'. When these panels have reached the locked position, the displaceable tongue 11i' springs back and enters the second tongue groove 12j' at the second edge 12' of the panel 30'. Figure 3 Shown by vertical movement locking, where the first edge 11' of the panel 10' is assembled to the second edge 12' of the panel 30' by vertical movement.

[0050] The third and fourth edges 13' and 14' of the corresponding panels are provided with a first locking system that enables assembly to an adjacent panel 20' by an angular movement to obtain simultaneous assembly of the first edge 11' and the second edge 12' with the third edge 13' and the fourth edge 14' as shown.

[0051] Shown by vertical movement locking, where the first edge 11' of the panel 10' is assembled to the second edge 12' of the panel 30' by vertical movement. Figure 3 Shown by vertical movement locking, where the first edge 11' of the panel 10' is assembled to the second edge 12' of the panel 30' by vertical movement.

[0052] Figure 4A -B shows a cross-section of different embodiments of a known locking system during the assembly of a first panel 10' and a second panel 20'.

[0053] Exemplary embodiments of the present invention are shown in Figures 5A - 5C and Figures 6 to 11 therein.

[0054] Referring to Figure 5A -C, 6 and 7, Figure 6 The first mechanical locking system shown is formed with a tongue 14h and a groove 13j and is configured for assembly by an angular movement. The fourth edge 14 may include a first locking projection 14e in the shape of a locking tongue provided with a first lower edge surface 14f. An embodiment of the second locking system is shown in Figure 7 wherein the second edge 12 is provided with a second locking projection 12e, which may be a locking tongue 12h provided with a second lower edge surface 12f. Preferably, the first lower edge surface 12f and the second lower edge surface 14f are configured to cooperate with the corresponding first upper surface 11c and second upper surface 13c of the first locking strip 13a and the second locking strip 11a of an adjacent panel, such as Figure 6 the second panel 20 shown, and such as Figure 7 the third panel 30 shown.

[0055] The first mechanical locking system may include a first tongue groove 13j at one of the third edge 13 or the fourth edge 14 (e.g., the third edge 13), and a first locking tongue 14h at the other of the third or fourth edges (e.g., the fourth edge 14). The first locking tongue 14h and the first tongue groove 13j are configured to cooperate to lock the third edge 13 and the fourth edge 14 in the vertical V direction. The first mechanical locking system may generally further include a first locking strip 13a at the third edge 13, which is provided with a vertically protruding first locking element 13b, and a first locking groove 14g at the fourth edge 14. The first locking element 13b is configured to cooperate with the first locking groove 14g to lock the third edge 13 and the fourth edge 14 in the horizontal direction, in particular to prevent the third edge 13 and the fourth edge 14 from moving away from each other perpendicular to the third and fourth edges.

[0056] The second mechanical locking system is preferably formed at one of the first short sides 11 or the second short sides 12 (e.g., the first edge) of similar, preferably substantially identical panels 10, 20, 30, 40, 50. The second mechanical locking system can be configured to lock the first edge 11 of the first panel 10 to the second edge of an adjacent panel 30 in a plane, such locking being in the horizontal direction perpendicular to and towards and away from each other of the first and second edges and / or in the vertical direction. An embodiment of the second mechanical locking system enables the assembly of the first panel and the second panel by the vertical movement of the second edge of the adjacent panel 30 relative to the first edge 11 of the first panel 10. Such vertical movement is shown, for example, in Figure 10 and Figure 11 . The first and second mechanical locking systems are preferably formed by mechanical machining (e.g., milling, drilling, and / or sawing) of the panel edges, and the second mechanical locking system can be provided with a displaceable tongue 11i preferably formed of plastic. The displaceable tongue can be bendable and provided with a protruding bendable portion, such as the displaceable tongue disclosed in WO2006 / 043893 and WO2007 / 015669. The displaceable tongue can also be configured to be locked by movement along the first and second edges, such as the displaceable tongue disclosed in WO2009 / 116926 and WO200 / 8004960.

[0057] Referring to Figure 7 , an embodiment of the second locking system can include a second locking tongue that can be provided in the shape of a displaceable tongue 11i in a displacement groove 11k arranged, for example, at the first edge 11 of the first panel 10. The displaceable tongue 11i is configured to cooperate with a first tongue groove 12j formed at the other of the first edge 11 or the second edge 12 to lock the first edge 11 and the second edge 12 in the vertical V direction.

[0058] In Figure 10 and 11 , another embodiment of the second locking system having an integral scheme shape that can be combined with the first locking system is shown.

[0059] As can be derived from Figure 6 , the upper edge portion of one of the third edge 13 or the fourth edge 14 (which can be opposite parallel edges), for example, the third edge 13, can include a flat surface portion that can be provided in the shape of a first lower lip 139 configured to cooperate with a complementary flat surface portion of the upper edge portion of the other of the third or fourth edges of the adjacent panel, including but not limited to receiving or mating with the complementary flat surface portion, where the complementary flat surface portion can be provided in the shape of a first upper lip 149.

[0060] As can be derived from Figure 7 the upper edge portion of either the first edge 11 or the second edge 12 (which may be opposite parallel edges), for example the first edge 11, may include a flat surface portion, the shape of which may be the second lower lip portion 119, which is configured to cooperate with a complementary flat surface portion of the upper edge portion of the other of the first or second edges of an adjacent panel, including but not limited to receiving or mating with the complementary flat surface portion, wherein the complementary flat surface portion can be provided in the shape of the second upper lip portion 129.

[0061] As Figure 6 shown, the outermost portion of the first upper lip portion 149 may be provided inside the outermost portion of the first locking tongue 14h.

[0062] As Figure 6 shown, the outermost portion of the first lower lip portion 139 may be provided inside the outermost portion of the first locking bar 13a.

[0063] As Figure 6 shown, the outermost portion of the first lower lip portion 139 may be provided outside the innermost portion of the first tongue groove 13j.

[0064] The upper edge portion of the fourth edge 14 (preferably a long side) may include a vertically extending edge portion extending from the front surface 15, followed by an inward bend, preferably a right-angled bend. After said bend is a horizontal plane, wherein said first upper lip portion 149 may include said horizontal plane. The vertically extending edge portion and the first upper lip portion may be perpendicular to each other, and the corner connecting these two portions may be rounded or chamfered. Optionally, the horizontal plane may additionally form a reference plane. The reference plane may be the surface that contacts an adjacent panel in the locked position and serves as a basis or guide for aligning these panels with each other.

[0065] The upper edge portion of the third edge 13 (preferably a long side) may include a vertically extending edge portion extending from the front surface, followed by an outward bend, preferably a right-angled bend. After said bend is a horizontal plane, wherein said first lower lip portion 139 may include said horizontal plane. The vertically extending edge portion and the first lower lip portion may be perpendicular to each other, and the corner connecting these two portions may be rounded. Optionally, said horizontal plane may additionally form a reference plane.

[0066] The upper edge portion of the second edge 12 (preferably a short side) may include a vertically extending edge portion extending from the front surface 15, followed by an inwardly curved portion, preferably a right-angled curved portion. After the curved portion is a horizontal plane, wherein the second upper lip portion 129 may include the horizontal plane. The vertically extending edge portion and the second upper lip portion may be perpendicular to each other, and the corner connecting the two portions may be rounded or chamfered. Optionally, the horizontal plane may additionally form a reference plane.

[0067] The upper edge portion of the first edge 11 (preferably a short side) may include a vertically extending edge portion extending from the front surface 15, followed by an outwardly curved portion, preferably a right-angled curved portion. After the curved portion is a horizontal plane, wherein the second lower lip portion 119 may include the horizontal plane. The vertically extending edge portion and the second lower lip portion may be perpendicular to each other, and the corner connecting the two portions may be rounded. Optionally, the horizontal plane may additionally form a reference plane.

[0068] As Figure 7 shown, the outermost portion of the second lower lip portion 119 may be disposed inside the outermost portion of the second locking bar 11a.

[0069] As Figure 11 shown, the second lower lip portion 119 may have an extension inside the innermost portion of the second tongue groove 11j.

[0070] As Figure 11 shown, the second upper lip portion 129 may have an extension outside the outermost portion of the second locking tongue 12h.

[0071] As Figure 7 shown, the outermost portion of the second lower lip portion 119 may be disposed inside the outermost portion of the second locking tongue 11i.

[0072] As Figure 7 shown, the outermost portion of the second lower lip portion 119 may be at least partially disposed inside the opening of the second displacement groove 11k.

[0073] "Inboard" may be synonymous with inward in the direction towards the center of the panel. "Outboard" may be synonymous with outward in the direction away from the center of the panel.

[0074] The upper lip and the lower lip may each include a reference plane configured to align the front surface 15 of the panel with the corresponding front surface 15 of an adjacent panel to be flush with each other when assembled in the locked position.

[0075] The upper lip and the lower lip can be planar. In particular, the lips can be planar and can extend in parallel. The lips can preferably extend in a plane parallel to the front surface 15 of the panel. However, other configurations are conceivable, such as being inclined with respect to the front surface 15.

[0076] The first upper lip portion 149 of the panel can be configured to support and / or rest on the first lower lip portion 139 when adjacent panels are assembled in a locking engagement. Thereby, when the panel is assembled to one or more additional panels in the locked position by means of the first locking system, it helps to improve the sealing function.

[0077] The second upper lip portion 129 of the panel can be configured to support and / or rest on the second lower lip portion 119 when adjacent panels are assembled in a locking engagement. Thereby, when the panel is assembled to one or more additional panels in the locked position by means of the second locking system, it helps to improve the sealing function.

[0078] The first lower lip portion 119 and the second lower lip portion 139 can form a continuous right angle with each other. The first upper lip portion 129 and the second upper lip portion 149 can form a continuous right-angled shape with each other. These continuous right angles can extend around the respective diagonally opposite corners of the panel. The first and second lower lip portions and the first and second upper lip portions can form the shape of a continuous rectangle. As Figure 5A shown, this rectangle can extend around the perimeter of the panel.

[0079] The first lower lip portion 119 and the second lower lip portion 139 can be configured to be located below when engaging with the corresponding upper lip portions 129, 149. The first upper lip portion 129 and the second upper lip portion 149 can be configured to be located above when engaging with the corresponding lower lip portions 119, 139.

[0080] Therefore, at least a portion of the lower lip portions 119, 139 can face in an upward direction, while at least a portion of the upper lip portions 129, 149 can face in a downward direction.

[0081] The first edge 11 and the third edge 13 can each include a vertically extending surface extending from the front surface 15 of the panel. The lower lip portions 119, 139 can engage with the corresponding vertically extending surfaces to form an inwardly recessed shape, such as an inwardly recessed right-angled surface.

[0082] The second edge 12 and the fourth edge 14 can each include a vertically extending surface extending from the front surface 15 of the panel. The upper lip portions 129, 149 can engage with the corresponding vertically extending surfaces to form an outwardly recessed shape, such as a right-angled surface, which is complementary to the corresponding inwardly recessed lower lip portions, as Figures 6 - 11 shown.

[0083] Each upper lip portion and / or lower lip portion may include materials that facilitate sealing, including but not limited to polymers, rubbers, silicones, adhesives, waxes, etc.

[0084] In a preferred embodiment, the corresponding first lower lip portion 119 and second lower lip portion 139 are respectively disposed on the short first edge 11 and the long third edge 13 of the panel 10, while the corresponding first upper lip portion 129 and second upper lip portion 149 are respectively disposed on the short second edge 12 and the long fourth edge 14, as Figure 6 , 7 , 10 and 11 show.

[0085] Thus, since the corresponding first upper lip portion 129 and second upper lip portion 149 can cooperate with the corresponding first lower lip portion 119 and second lower lip portion 139, including being supported thereon, this configuration can bring the following technical advantages: the weight of the panel pushes the corresponding first upper lip portion 129 and second upper lip portion 149 towards the corresponding first lower lip portion 119 and second lower lip portion 139, whereby the weight of the panel can contribute to the sealing function, thus facilitating improved sealing.

[0086] This means that in some embodiments, when two adjacent panels are assembled in the locked position, the first lower edge surfaces 14f and the first upper surfaces 13c of the two adjacent panels may not be adjacent to each other in some embodiments. Therefore, when assembled in the locked position, a gap may extend between at least a portion of the first lower edge surface 14f of the two adjacent panels and the first upper surface 13c.

[0087] However, in some embodiments, when two adjacent panels are assembled in the locked position by means of the first locking system, the first lower edge surface 14f and the first upper surface 13c of the two adjacent panels can be adjacent to each other.

[0088] Referring to Figure 6 , the first locking tongue 14h, the first tongue groove 13j and the first lip portions 139, 149 can be configured to bias the first upper lip portion 149 towards the first lower lip portion 139 when the corresponding third edge 13 and fourth edge 14 are assembled in the locked position. When one or more panels are assembled in the locked position, this configuration can promote the first upper lip portion 149 to always be biased towards the first lower lip portion 139.

[0089] The first locking system may include a first locking tongue 14h and a first tongue groove 13j. The first lower lip portion 139 is preferably disposed between the first tongue groove 13j and the front surface 15 of the panel. The first upper lip portion 149 is preferably disposed between the first locking tongue 14h and the front surface 15 of the panel.

[0090] Referring to Figure 7, in some embodiments, one of the first or second edges 11, 12, for example the first edge 11, may include a displaceable, preferably flexible tongue 11i, which tongue 11i is configured to be able to assemble the panel by means of a vertical fold. The displaceable tongue 11i may be configured to cooperate with the second tongue groove 12j to thereby bias the second upper lip 129 against the second lower lip 119, thus facilitating an improved sealing function.

[0091] The second locking system may include second locking tongues 11i, 12h and second tongue grooves 12j, 11j. The second lower lip 119 is preferably provided between the second tongue grooves 12j, 11j and the front surface 15 of the panel. The second upper lip 129 is preferably provided between the second locking tongues 11i, 12h and the front surface 15 of the panel.

[0092] As can be deduced, for example from Figures 6 - 11 [[ID=...]] By providing a pair of lips, such as the first lower lip and upper lip 139, 149 and / or the second lower lip and upper lip 119, 129, each pair of lips 119, 129; 139, 149 can respectively form a mechanical labyrinth seal. Thus, this configuration is particularly advantageous for preventing moisture penetration between the edges 11, 12 and / or between the edges 13, 14 - for example between the front surface 15 and the locking tongues 11i, 12h or 14h or tongue grooves 11j, 12j, 13j or from the front surface 15 to the back surface 16.

[0093] Referring to Figure 8 and 12 , which shows an exemplary embodiment of assembling the panel into a wall, i.e., the panel is used as a wall panel. Providing lips 119, 129, 139, 149 between the locking tongues 11i, 12h, 14h and / or locking grooves 11j, 12j, 13j and the front surface 15 can facilitate one or more pairs of the paired lips, i.e., 119, 129; 139, 149 to provide a mechanical obstruction for fluids such as water. Thus, fluids such as water flowing along the front surface 15 in the vertically downward direction under the action of gravity can be obstructed from flowing through the lips, such as the first lower lip 139, in the direction from the front surface 15 to the back surface 16.

[0094] In particular, the first lower lip 139 can, for example, provide a mechanical obstruction for fluids such as water extending in a direction opposite to the direction of gravity. Thus, fluids such as water flowing along the front surface 15 in the vertically downward direction under the action of gravity will be prevented from flowing upward and above the first lower lip 139.

[0095] The first lower lip 139 and the first upper lip 149 may jointly define a reference plane Dp, as Figure 10 shown.

[0096] The second lower lip portion 119 and the second upper lip portion 129 may respectively define a reference plane Dp, as Figure 7 shown.

[0097] The first, second, third, and fourth lip portions 119, 129, 139, 149 may be configured to define a reference plane Dp.

[0098] The first, second, third, and fourth lip portions 119, 129, 139, 149 may extend substantially in a common plane, which may be the reference plane Dp.

[0099] The reference plane Dp may facilitate the alignment of the corresponding front surfaces 15 of adjacent panels when assembled to the locked position, such that the corresponding front surfaces 15 of adjacent panels are arranged flush with each other.

[0100] The first lower lip portion 139 may preferably be disposed between the first tongue groove 13j and the front surface 15 of the panel. The first upper lip portion 149 may preferably be disposed between the first locking tongue 14h and the front surface 15 of the panel.

[0101] As described above and Figure 7 shown, according to an embodiment, one of the first edge or the second edge may include a second locking tongue 11i, such as a displaceable locking tongue configured to linearly translate in the displacement groove 11k, and the other of the first and second edges includes a second tongue groove 12j for receiving the second locking tongue.

[0102] The second lower lip portion 119 may preferably be disposed at a vertical V position between the second locking tongue 11i and the front surface 15 of the panel. The second upper lip portion 129 may preferably be disposed at a vertical V position between the second tongue groove 12j and the front surface 15 of the panel.

[0103] Alternatively, as Figure 10 and 11 shown, the second lower lip portion 119 may be disposed at a vertical V position between the second tongue groove 11j of the first edge 11 and the front surface 15 of the panel. The second upper lip portion 129 may be disposed at a vertical V position between the second tongue 12h of the second edge 12 and the front surface 15 of the panel.

[0104] The first lower lip portion 139 may be adjacent to the second lower lip portion 119.

[0105] The first upper lip portion 149 may be adjacent to the second upper lip portion 129, preferably continuous with the second upper lip portion 129.

[0106] The lip portions 119, 129, 139, 149 may be adjacent to each other, thereby continuously extending along the first, second, third, and fourth edges.

[0107] When a panel is assembled with similar panels in a locked position along all edges 11, 12, 13, 14, since the lips 119, 129, 139, 149 overlap vertically with each other in a complementary manner, they can continuously define a reference plane Dp along the first, second, third, and fourth edges. Thereby, it is possible to facilitate the improvement of sealing.

[0108] Therefore, the function of these lips can be twofold: when assembled in a locked position on all four edges of the panel, the lips having corresponding mating with adjacent panels together provide a continuous seal along the perimeter of the panel and / or the function of aligning the corresponding front surfaces of the panels.

[0109] These lips can be formed to be adjacent to each other to thereby continuously define a reference plane Dp along the perimeter of the panel. Thereby, when a panel is assembled with other substantially similar panels in a locked position along all four edges, continuous contact along substantially the entire perimeter or the entire perimeter of the panel provided by the mating or closed lips 119, 129; 139, 149 is obtained. Therefore, it is possible to facilitate continuous sealing along the perimeter of the panel.

[0110] Referring to Figure 7 , preferably, the edges of the panel including the locking strips, i.e., the first edge 11 and the third edge 13, may include corresponding lower lips.

[0111] For example, referring to Figures 6 - 7 and 10 - 11, preferably, the edges of the panel including the locking strips, i.e., the first edge 11 and the third edge 13, may include corresponding lower lips.

[0112] The panel 10 may include a surface layer 15a provided at the front surface 15, and preferably includes a backing layer 16a provided at the rear surface 16. Generally, the surface layer includes a decorative layer which is configured to be visible when the panel is assembled as a floor. Such decorative layers are well known in the art and can be provided in different forms, including but not limited to printed paper, powder, printed powder, or veneer, such as wood veneer. The surface layer which may also provide a protective layer typically contains an adhesive resin, such as a thermosetting resin, which facilitates the bonding between the decorative layer and the panel core, i.e., adhesion. The adhesive may also facilitate the bonding of one or more additives such as surface hardening particles and / or pigments in order to provide various properties to the surface layer. The adhesive may include, for example, melamine formaldehyde resin. The adhesive may penetrate into the core of the panel during panel manufacturing, and generally the adhesive is provided in powder form, whereby it turns into a liquid in response to exposure to heat. Therefore, the adhesive can penetrate into the core of the building panel. The core may include, for example, one of MDF, HDF, wood, stone, ceramic, PVC, plastic, and other materials may also be considered.

[0113] The adhesive may have a certain penetration depth from the front surface 15 of the panel into the core of the panel in the thickness direction Z. This feature provides an improved seal between the corresponding upper and lower lips.

[0114] The penetration depth may enter at least the first lower lip and the upper lips 139, 149. This provides a more waterproof first locking system.

[0115] The penetration depth may enter at least the second lower lip and the upper lips 119, 129. This provides a more waterproof second locking system.

[0116] Thus, aspects of the present disclosure may be particularly applicable to wet spaces such as bathrooms, kitchens, etc.

[0117] Thus, aspects of the present disclosure may be suitable for use as floor panels, such as Figures 6 - 7 as shown in FIGS. 10 - 11 and 13.

[0118] Thus, aspects of the present disclosure may be suitable for use as wall panels, such as Figures 8 - 9 as shown in FIGS. 11 and 12.

[0119] It should be understood that the arrangement and configuration of the upper and lower lips 119, 129, 139, 149, which are particularly configured to continuously extend along all edges of the panel as described herein, are not limited to being used in combination with a specific locking system, but can be implemented in combination with almost any mechanical locking system and building panels of any material. The above - mentioned locking systems are only used as exemplary embodiments of possible implementation forms.

[0120] Referring to Figures 12 - 13 , a panel such as the first panel 10 can be assembled to an adjacent second panel 20 along its long fourth edge 14 by means of the first locking system, for example, by an angular movement, thereby forming a long - edge - to - long - edge joint. The panel 10 can be further assembled to an adjacent third panel 30 by means of the second locking system, for example, by a vertical fold using one of its short edges 11, thereby forming a short - edge - to - short - edge joint, and can be further assembled to yet another fourth panel 40 by means of the first locking system, for example, by an angular movement using its long third edge 13, thereby forming yet another long - edge - to - long - edge joint. These two additional panels 20, 40 are arranged on opposite sides of the short - edge joint. The resulting panel configuration is in, for example, assembling a floating floor as shown in Figure 13 or a Figure 12A typical floor covering layer when covering the wall shown. It can be deduced that this configuration includes two T-shaped joints. Each T-shaped joint includes a long-edge-to-long-edge joint (between the third edge 13 and the fourth edge 14) and a short-edge-to-short-edge joint (between the first edge 11 and the second edge 12). Thus, the set of similar or substantially identical panels can be assembled in a locked position to include a first T-shaped joint T1 and a second T-shaped joint T2, as for example Figure 13 shown.

[0121] To improve the seal between assembled panel floor coverings, such as floor coverings, which include panels assembled in a locked position on all four sides (i.e., all four edges), it is desirable to improve the waterproofness of the two T-shaped joints. Figure 13 ).

[0122] Thanks to the building panels having the features set forth in this text and the appended claims, it can be beneficial to improve the seal of both the T-shaped joints T1 and T2.

[0123] Figures 14A - 14B , 15A - 15B, 16A - 16B, 17A - 17B, 18A - 18B, and 19A - 19B show different embodiments of the bladder that can be combined with any of the embodiments disclosed herein. These bladders can be configured to receive a sealant, such as a fluid or wax. Providing one or more bladders can help improve the seal of the joints between adjacent panels configured in the assembled position. When adjacent panels are assembled, the wax bladders can cooperate to control the flow of the sealant across the joint, for example, from the bladder in a direction across the joint towards the front surface 15 and / or the rear surface 16.

[0124] In Figures 14A - 14B , the upper edge portion of the fourth edge 14, for example the long edge, includes a vertically extending edge portion 184 extending from the front surface 15, followed by a bend inwardly towards the center of the panel, preferably a right-angle bend. This bend can be a chamfered right-angle bend as Figures 14A - 14B shown. After the bend is a horizontal plane, in which the first upper lip 149 can include said horizontal plane.

[0125] The upper edge portion of the third edge 13, for example the long edge, can include a vertically extending edge portion 182 extending from the front surface 15, followed by a bend outwardly in the direction from the center of the panel, preferably a right-angle bend. After this bend is a horizontal plane, the first lower lip 139 can include said horizontal plane. A bladder 111 is provided in the third edge 13 and is located between the vertically extending edge portion 182 and the horizontal plane. The bladder 111 extends downward in the vertical direction towards the rear surface 16. The bladder 111 extends below the horizontal plane. The bladder 111 opens upward in the direction towards the front surface 15.

[0126] InFigures 15A - 15B In [description], the fourth edge 14, for example, the upper edge portion of the long side, includes a vertically extending edge portion 184 extending from the front surface 15, followed by a bend inwardly towards the center of the panel, preferably a right-angled bend. The bend may be a chamfered right-angled bend. After the bend is a horizontal plane, and the first upper lip portion 149 may include the horizontal plane.

[0127] The third edge 13, for example, the upper edge portion of the long side, may include a vertically extending edge portion 182 extending from the front surface 15, followed by a bend outwardly in the direction from the center of the panel, preferably a right-angled bend. After the bend is a horizontal plane, and the first lower lip portion 139 may include the horizontal plane. The pocket 112 is provided in the third edge 13 and is located between the vertically extending edge portion 182 and the horizontal plane. The pocket 112 extends laterally in the horizontal direction towards the center of the panel 20 including the third edge 13. The pocket 112 preferably does not extend below the horizontal plane. The pocket 112 opens laterally in a direction away from the third edge 13.

[0128] In Figures 16A - 16B In [description], the fourth edge 14, for example, the upper edge portion of the long side, includes a vertically extending edge portion 184 extending from the front surface 15, followed by a bend inwardly towards the center of the panel, preferably a right-angled bend. The bend may be a chamfered right-angled bend. After the bend is a horizontal plane, and the first upper lip portion 149 may include the horizontal plane.

[0129] The third edge 13, for example, the upper edge portion of the long side, may include a vertically extending edge portion 182 extending from the front surface 15, followed by a bend outwardly in the direction from the center of the panel, preferably a right-angled bend. After the bend is a horizontal plane, and the first lower lip portion 139 may include the horizontal plane. The pocket 113 is provided in the third edge 13 and is located between the vertically extending edge portion 182 and the horizontal plane. The pocket 113 extends into the third edge in a direction having an angle with respect to the vertically extending edge portion 182, and the angle is, for example, between 15 - 75 degrees, for example, 45 degrees. The pocket 113 may extend below the horizontal plane. The pocket 113 opens at least partially laterally in a direction away from the third edge 13. The pocket 113 may have an opening corresponding to the length of the chamfer (in the side view of Figure 16B )

[0130] In Figures 17A - 17B In [description], the fourth edge 14, for example, the upper edge portion of the long side, includes a vertically extending edge portion 184 extending from the front surface 15, followed by a bend inwardly towards the center of the panel including the fourth edge 14, preferably a right-angled bend. The bend may be a chamfered right-angled bend. After the bend is a horizontal plane, and the first upper lip portion 149 may include the horizontal plane.

[0131] The third edge 13, for example, the upper edge portion of the long side, may include a vertically extending edge portion 182 extending from the front surface 15, followed by a continuous first bend that turns inwardly into the third edge 13, for example, a bend of 10-20 degrees. After the first bend is a continuous second bend that extends outwardly in the direction from the panel center, such as an acute-angle bend. After the second bend is a continuous horizontal plane, and the first lower lip portion 139 may include said horizontal plane. Thus, a pocket 114 is provided in the third edge 13 between the vertically extending edge portion 182 and the horizontal plane. The pocket 114 extends into the third edge. The pocket 114 preferably does not extend below the horizontal plane. The pocket 114 is at least partially laterally open in a direction away from the third edge 13. The pocket 114 may have an opening greater than the length of the chamfer (in Figure 17B the side view).

[0132] In Figures 18A - 18B , the fourth edge 14, for example, the upper edge portion of the long side, includes a vertically extending edge portion 184 extending from the front surface 15, followed by a bend that turns inwardly towards the center of the panel including the fourth edge 14, preferably a right-angle bend. This bend may be a chamfered right-angle bend. After this bend is a horizontal plane, and the first upper lip portion 149 may include said horizontal plane.

[0133] The third edge 13, for example, the upper edge portion of the long side, may include a vertically extending edge portion 182 extending from the front surface 15, followed by a continuous acute-angle bend that extends outwardly in the direction from the panel center. After this bend is a continuous plane, and the first lower lip portion 139 may include said plane. Said plane may form a certain angle with the horizontal plane H. Thus, a pocket 115 is provided in the third edge 13 between said continuous plane and the first upper lip portion 149. The pocket 115 is at least partially laterally open in a direction away from the third edge 13. The pocket 115 may have an opening greater than the length of the chamfer (in Figure 18B the side view).

[0134] In Figures 19A - 19B , the fourth edge 14, for example, the upper edge portion of the long side, includes a vertically extending edge portion 184 extending from the front surface 15, followed by a bend that turns inwardly towards the panel center, preferably a right-angle bend. This bend is a chamfered edge between the vertically extending edge portion 184 and the first upper lip portion 149. This chamfered edge provides a first pocket 116 between the third edge 13 and the fourth edge 14. After this bend is a horizontal plane, and the first upper lip portion 149 may include said horizontal plane.

[0135] The third edge 13, for example, the upper edge portion of the long side, may include a vertically extending edge portion 182 extending from the front surface 15, followed by a bent portion outward in the direction from the center of the panel, preferably a right-angled bent portion. After this bent portion is a horizontal plane, and the first lower lip portion 139 may include the said horizontal plane. The second bladder portion 116' is provided in the vertically extending edge portion 182. Then the second bladder portion 116' extends laterally in the horizontal direction towards the center of the panel 20 including the third edge 13. The second bladder portion 116' may not extend below the horizontal plane. The second bladder portion 116' opens laterally in a direction away from the third edge 13. When the third edge 13 is configured to be in the assembled position with the fourth edge 14, the second bladder portion 116' is at least partially open to the first bladder portion 116, so as to be at least partially in direct fluid communication with the first bladder portion 116.

[0136] Although the bladder portions 111, 112, 113, 114, 115, 116, 116' have been explained with respect to the third edge 13 and the fourth edge 14 (such as the long side) of the panel, it should be understood that the corresponding bladder portions may be formed between the first edge 11 and the second edge (such as the short side) of the panel.

[0137] Figure 20A An embodiment is shown in which the first lower lip portion 139 is provided in the first plane H1, and the second lower lip portion 119 is provided in a second plane H2 displaced from the first plane H1. Preferably, the first plane H1 is 0.2 to 0.5 mm below the second plane H2, preferably about 0.3 mm, and more preferably 0.3 mm. Thus, the second lower lip portion 119 is provided above the first lower lip portion 139 and is closer to the front surface 15 than the first lower lip portion 139.

[0138] By arranging the second lower lip portion 119 in the second plane H2 located above the plane of the first lower lip portion 139, it can be beneficial for fluid (such as water) to flow from the second lower lip portion 119 to the first lower lip portion 139. The fluid can flow under the action of gravity.

[0139] In a floor including a plurality of panels according to this embodiment configured in the assembled position, by arranging the second lower lip portion 119 in the second plane H2 located above the plane of the first lower lip portion 139, it can help improve the waterproof penetration performance.

[0140] Figure 20B An embodiment is shown in which when these panels are configured in the assembled position, for example, when the first edge 11 and the second edge 12 are configured in the assembled position, the second upper lip portion 129 and the second lower lip portion 119 are arranged in the second plane H2.

[0141] Figure 20CAn embodiment is shown in which, when the panels are configured in the assembled position, for example when the third edge 13 and the fourth edge 14 are configured in the assembled position, the first upper lip 149 and the first lower lip 139 are arranged in the first plane H1.

[0142] Entry

[0143] Entry 1. A set of similar or substantially identical building panels, such as floor panels or wall panels, comprising:

[0144] A first mechanical locking system at the respective parallel and opposite third and fourth edges 13, 14 (e.g., long edges), the first mechanical locking system being configured to cooperate, preferably by means of a folding movement, to effect locking between two adjacent building panels 10, 20, and

[0145] A second locking system at the respective parallel and opposite first and second edges 11, 12 (e.g., short edges), the second locking system being configured to cooperate to lock two adjacent building panels 10, 30,

[0146] wherein an upper edge portion of one of the long edges (e.g., the third edge or the fourth edge 13, 14) of the panel, preferably the third edge 13, includes a first lower lip 139 configured to mate with a first upper lip 149 of an upper edge portion of the other of the third and fourth edges of an adjacent panel 20 when the third and fourth edges are assembled in the locked position.

[0147] Entry 2. The set of building panels according to Entry 1, wherein the first locking system is configured to cooperate, preferably by means of a folding movement, to effect horizontal and vertical locking between two adjacent building panels 10, 20.

[0148] Entry 3. The set of building panels according to Entry 1 or 2, wherein the second locking system is configured to cooperate, preferably by means of a vertical movement such as a vertical fold, to horizontally and / or vertically lock two adjacent building panels 10, 30.

[0149] Entry 4. The set of building panels according to any one of Entries 1 - 3, wherein an upper edge portion of one of the short edges (e.g., the first or second edge) of the panel includes a second lower lip 119 configured to mate with a second upper lip 129 of an upper edge portion of the other of the first and second edges of an adjacent panel 30 when the first and second edges are assembled in the locked position.

[0150] Entry 5. The set of building panels according to the previous Entry 4, wherein the lips 119, 129, 139, 149 all include a horizontal plane.

[0151] Item 6. A set of building panels according to any one of the preceding Items 4 - 5, wherein the first lower lip portion 139 and the second lower lip portion 119 are continuous, and preferably, the first upper lip portion 149 and the second upper lip portion 129 are continuous.

[0152] Item 7. A set of building panels according to any one of the preceding Items 4 - 6, wherein when a panel is assembled with similar panels in a locked position along all the edges 11, 12, 13, 14, the lips 119, 129, 139, 149 preferably define a reference plane Dp continuously along the first, second, third, and fourth edges.

[0153] Item 8. A set of building panels according to any one of the preceding Items 4 - 7, wherein the lips 119, 129, 139, 149 are adjacent to each other so as to extend continuously along the first, second, third, and fourth edges.

[0154] Item 9. A set of building panels according to any one of the preceding Items 4 - 8, wherein when adjacent panels are assembled in a locked position by a first locking system, the first upper lip portion 149 is configured to rest on the first lower lip portion 139.

[0155] Item 10. A set of building panels according to any one of the preceding Items 4 - 9, wherein when adjacent panels are assembled in a locked position by a second locking system, the second upper lip portion 129 is configured to rest on the second lower lip portion 119.

[0156] Item 11. A set of building panels according to any one of the preceding Items 4 - 10, wherein the first and second locking systems each include locking tongues 11i, 12h, 14h and tongue grooves 11j, 12j, 13j, and the lips 119, 129, 139, 149 are provided between the corresponding locking tongues or tongue grooves and the front surface 15 of the panel.

[0157] Item 12. A set of building panels according to any one of the preceding Items 4 - 11, wherein the upper edge portion of the second edge 12 and / or the fourth edge 14 includes a vertically extending edge portion extending from the front surface 15, followed by a continuous bend inwardly towards the center of the panel, and preferably, a horizontal plane follows the bend.

[0158] Item 13. A set of building panels according to any one of the preceding Items 4 - 12, wherein the upper edge portion of the first edge 11 and / or the third edge 13 includes a vertically extending edge portion extending from the front surface 15, followed by a continuous bend outwardly away from the center of the panel, and preferably, a horizontal plane follows the bend.

[0159] Article 14. A set of building panels according to any one of the preceding Articles 12 or 13, wherein the bent portion includes a right-angle bent portion.

[0160] Article 15. A set of building panels according to any one of the preceding Articles 4 - 14, wherein the first lower lip portion 139 and the second lower lip portion 119 are continuous.

[0161] Article 16. A set of building panels according to any one of the preceding Articles 4 - 15, wherein the first upper lip portion 149 and the second upper lip portion 129 are continuous.

[0162] Article 17. A set of building panels according to any one of the preceding Articles 4 - 16, wherein the second lower lip portion 119 abuts the first upper lip portion 149.

[0163] Article 18. A set of building panels according to any one of the preceding Articles 4 - 17, wherein the second upper lip portion 129 abuts the first lower lip portion 139.

[0164] Article 19. A set of building panels according to any one of the preceding Articles 4 - 18, wherein the first and second upper and lower lip portions 119, 129, 139, 149 define a reference plane Dp for aligning the front surface 15 of the building panel with the front surface (15) of an adjacent building panel.

[0165] Article 20. A set of building panels according to any one of the preceding Articles 4 - 19, wherein one of the first or second edges includes a second locking tongue 11i, such as a displaceable locking tongue configured to linearly translate in a displacement groove 11k, and the other of the first and second edges includes a second tongue groove 12j for receiving the second locking tongue, wherein the lips (119, 129, 139, 149) are disposed between the first tongue groove and the front surface 15 of the panel.

[0166] Article 21. A set of building panels according to any one of the preceding Articles 4 - 20, wherein when one panel is assembled with a similar panel in a locked position along all edges 11, 12, 13, 14, the lips 119, 129, 139, 149 abut each other, preferably, the lips extend continuously along the first, second, third, and fourth edges, and / or continuously define the reference plane Dp along the first, second, third, and fourth edges.

[0167] Article 22. A set of building panels according to any one of the preceding Articles 4 - 21, wherein the first, second, third, and fourth lips extend substantially in a common plane.

[0168] Article 23. A set of building panels according to any one of the preceding Articles 1 - 22, wherein the panel comprises a surface layer 15a which contains an adhesive, such as a thermosetting resin.

[0169] Article 24. A set of building panels according to the preceding Article, wherein the adhesive 18 has a certain penetration depth into the core 17 of the panel in a direction transverse to the front surface 15.

[0170] Article 25. A set of building panels according to the preceding Article, wherein the penetration depth extends to and includes at least a portion of the lip.

[0171] Article 26. A set of building panels according to any one of the preceding claims 23 - 25, wherein the surface layer 15a is a protective surface layer and / or a decorative surface layer.

[0172] Article 27. A set of building panels according to any one of the preceding Articles 23 - 26, wherein the surface layer 15a comprises one or more of veneer, pigment, cellulose fiber.

[0173] Article 28. A set of building panels according to any one of the preceding Articles 23 - 27, wherein the adhesive comprises a thermosetting material, such as melamine formaldehyde resin.

[0174] Article 29. A set of building panels according to any one of the preceding claims 24 - 28, wherein the core 17 comprises one or more of MDF, HDF, wood, stone, ceramic, PVC, plastic.

[0175] Article 30. A set of building panels according to any one of the preceding claims 1 - 29, wherein the first lower lip 139 is disposed in a first plane H1 and the second lower lip 119 is disposed in a second plane H2 which is displaced from the first plane H1.

[0176] Article 31. A set of building panels according to any one of the preceding claims 1 - 30, wherein the first plane H1 is disposed 0.2 to 0.5 mm below the second plane H2, preferably approximately 0.3 mm, more preferably 0.3 mm.

[0177] Article 32. A set of building panels according to any one of the preceding claims 1 - 33, wherein an upper edge portion of the second edge 12 and / or the fourth edge 14 (e.g., the long edge) includes a vertically extending edge portion 184 extending from the front surface 15, followed by a first bend inwardly towards the center of the panel, preferably a right-angle bend, and preferably, the bend includes a chamfered edge located between the vertically extending edge portion 184 and the first upper lips 149, 139, wherein a horizontal plane follows the bend, preferably, the first upper lips 149, 129 include the horizontal plane, and

[0178] wherein an upper edge portion of the third edge 13 and / or the first edge 11 (e.g., the long edge) includes a vertically extending edge portion 182 extending from the front surface 15, followed by a second bend outwardly in the direction away from the center of the panel, preferably a right-angle bend, wherein a horizontal plane follows the second bend, preferably, the first lower lips 139, 119 include the horizontal plane, and wherein the pockets 111, 112, 113 are provided in the third edge 13 and / or the first edge 11 and are located between the vertically extending edge portion 182 and the horizontal plane.

[0179] Article 33. A set of building panels according to Article 32, wherein the pocket 111 extends downwardly in the vertical direction towards the rear surface 16, preferably, the pocket 111 extends below the horizontal plane; the pocket 111 opens upwardly in the direction towards the front surface 15.

[0180] Article 34. A set of building panels according to Article 32, wherein the pocket 112 extends laterally in the horizontal direction towards the center of the panel 20 including the third edge 13 and / or the first edge 11, preferably, the second pocket 112 does not extend below the horizontal plane; the pocket 112 opens laterally in the direction away from the third edge 13 and / or the first edge 11.

[0181] Article 35. A set of building panels according to Article 32, wherein the pocket 113 extends into the third edge in a direction at an angle with respect to the vertically extending edge portion 182, e.g., an angle between 15 - 75 degrees, e.g., an angle of 45 degrees; the pocket 113 extends below the horizontal plane; the pocket 113 opens at least partially laterally in the direction away from the third edge 13 and / or the first edge 11.

[0182] Item 36. A set of building panels according to any one of the preceding Items 1 - 31, wherein the upper edge portion of the fourth edge 14 and / or the second edge 12 (e.g., the long side) includes a vertically extending edge portion 184 extending from the front surface 15, followed by a bend towards the center of the panel, preferably a right-angle bend; the bend is preferably a chamfered right-angle edge between the vertically extending edge portion 184 and the first upper lips 149, 129; the chamfered edge forms a first pocket 116 between the third edge 13 and the fourth edge 14 and / or between the first edge 11 and the second edge 12; after the first bend is a horizontal plane, wherein the first upper lips 149, 129 include said horizontal plane, and

[0183] wherein the upper edge portion of the third edge 13 and / or the first edge 11 (e.g., the long side) includes a vertically extending edge portion 182 extending from the front surface 15, followed by a second bend outward in the direction from the center of the panel, preferably a right-angle bend; after the bend is a horizontal plane, the first lower lips 139, 119 include said horizontal plane; a second pocket 116' is provided in the vertically extending edge portion 182; the second pocket 116' extends laterally in the horizontal direction towards the center of the panel 20 including the third edge 13 and / or the first edge 11; preferably, the second pocket 116' does not extend below said horizontal plane, preferably, the second pocket 116' opens laterally in a direction away from the third edge 13 and / or the first edge 11, preferably, when the third edge 13 and the fourth edge 14 are in the assembled position and / or the first edge 11 and the second edge 12 are in the assembled position, the second pocket 116' opens at least partially towards the first pocket 116 and is at least partially in direct fluid communication with the first pocket 116.

[0184] Item 37. A set of building panels according to any one of the preceding Items 1 - 31, wherein the upper edge portion of the fourth edge 14 and / or the second edge 12 (e.g., the long side) includes a vertically extending edge portion 184 extending from the front surface 15, followed by a bend towards the center of the panel including the fourth edge 14 and / or the second edge 12, preferably a right-angle bend; preferably, said bend is a chamfered right-angle bend; after the first bend is a horizontal plane, wherein the first upper lips 149, 129 include said horizontal plane, and

[0185] Wherein, the upper edge portion of the third edge 13 and / or the first edge 11 (e.g., the long side) includes a vertically extending edge portion 182 extending from the front surface 15, followed by an adjacent first bend inwardly into the third edge 13 and / or the first edge 11, e.g., a bend of 10 - 20 degrees; after the first bend is an adjacent second bend outwardly in the direction from the panel center, e.g., an acute bend; after the second bend is an adjacent horizontal plane, the first lower lip portions 139, 119 include the horizontal plane, thereby providing a pocket 114 in the third edge 13 and / or the first edge 11 between the vertically extending edge portion 182 and the horizontal plane; the pocket 114 extends into the third edge 13 and / or the first edge 11; the pocket 114 preferably does not extend below the horizontal plane; the pocket 114 is at least partially laterally open in a direction away from the third edge 13 and / or the first edge 11.

[0186] Item 38. A set of building panels according to any one of the preceding items 1 - 31, wherein the upper edge portion of the fourth edge 14 and / or the second edge 12 (e.g., the long side) includes a vertically extending edge portion 184 extending from the front surface 15, followed by a bend inwardly towards the center of the panel including the fourth edge 14 and / or the second edge 12, preferably a right - angle bend; preferably, the bend is a chamfered right - angle bend; after the bend is a horizontal plane, wherein the first upper lip portions 149, 129 include the horizontal plane, and

[0187] Wherein, the upper edge portion of the third edge 13 and / or the first edge 11 (e.g., the long side) may include a vertically extending edge portion 182 extending from the front surface 15, followed by an adjacent acute bend outwardly in the direction from the panel center; after the bend is a continuous plane; the first lower lip portions 139, 119 include the horizontal plane, wherein the continuous plane forms an angle with the front surface 15, thereby providing a pocket 115 in the third edge 13 and / or the first edge 11 between the plane and the first upper lip portions 149, 129; the pocket 115 is at least partially laterally open in a direction away from the third edge 13 and / or the first edge 11.

Claims

1. A set of similar or substantially identical building panels, such as floor panels or wall panels, wherein each building panel comprises: a first mechanical locking system at corresponding parallel and opposite third edges (13) and fourth edges (14), such as the long sides of the building panel, the first mechanical locking system being configured to cooperate, preferably by means of a folding movement, for horizontal and vertical locking of two adjacent building panels (10, 20), and a second mechanical locking system at corresponding parallel and opposite first edges (11) and second edges (12), such as the short sides of the building panel, the second mechanical locking system being configured to cooperate, preferably by means of a vertical movement, such as a vertical fold, for horizontal and vertical locking of two adjacent building panels (10, 30), wherein an upper edge portion of one of the third edge (13) or the fourth edge (14), preferably the upper edge portion of the third edge (13), comprises a first lower lip (139) configured to cooperate with a first upper lip (149) of an upper edge portion of the other of the third edge (13) and the fourth edge (14) of an adjacent building panel (20) when the third edge (13) and the fourth edge (14) are assembled in the locked position, wherein the building panel further comprises a surface layer (15a) comprising an adhesive (18), the adhesive (18) comprising a thermosetting resin, wherein the adhesive (18) has a penetration depth into the building panel in a direction transverse to the front surface (15) of the building panel, and wherein the penetration depth extends at least into a part of the first upper lip (149).

2. The set of building panels according to claim 1, wherein, An upper edge portion of one of the first edge (11) or the second edge (12) comprises a second lower lip (119) configured to cooperate with a second upper lip (129) of an upper edge portion of the other of the first edge (11) and the second edge (12) of an adjacent building panel (30) when the first edge (11) and the second edge (12) are assembled in the locked position.

3. A set of building panels according to claim 1 or 2, wherein, The penetration depth extends at least into a part of the second upper lip (129).

4. A set of building panels according to any one of the preceding claims, wherein, Each lip (119, 129, 139, 149) comprises a flat horizontal surface.

5. A set of building panels according to any one of the preceding claims, wherein, The first lower lip (139) is continuous with the second lower lip (119), preferably wherein the first upper lip (149) is continuous with the second upper lip (129).

6. A set of building panels according to any one of the preceding claims, wherein, When a building panel is assembled with a similar building panel in the locked position along all edges (11, 12, 13, 14), the lips (119, 129, 139, 149) preferably define a reference plane (Dp) continuously along the first, second, third and fourth edges (11, 12, 13, 14).

7. A set of building panels according to any one of the preceding claims, wherein, The lips (119, 129, 139, 149) are adjacent to each other so as to extend continuously along the first, second, third and fourth edges (11, 12, 13, 14).

8. A set of building panels according to any one of the preceding claims, wherein, When adjacent building panels are assembled in the locked position by the first mechanical locking system, the first upper lip (149) is configured to rest on the first lower lip (139).

9. A set of building panels according to any one of the preceding claims, wherein, When adjacent building panels are assembled in the locked position by the second mechanical locking system, the second upper lip (129) is configured to rest on the second lower lip (119).

10. A set of building panels according to any one of the preceding claims, wherein, Both the first and second mechanical locking systems include locking tongues (11i, 12i, 14h) and tongue grooves (11j, 12j, 13j), wherein the lips (119, 129, 139, 149) are disposed between a respective one of the locking tongues (11i, 12i, 14h) or tongue grooves (11j, 12j, 13j) and the front surface (15) of the building panel.

11. A set of building panels according to any one of the preceding claims, wherein, The upper edge portions of the second edge (12) and / or the fourth edge (14) each include a vertically extending edge portion extending from the front surface (15), followed by a continuous bend inwardly towards the center of the building panel, preferably followed by a horizontal flat surface of the first upper lip (149) and / or a flat surface of the second upper lip (129) following the bend.

12. A set of building panels according to any one of the preceding claims, wherein, The upper edge portions of the first edge (11) and / or the third edge (13) each include a vertically extending edge portion extending from the front surface (15), followed by a continuous bend outwardly away from the center of the building panel, preferably followed by a horizontal flat surface of the first lower lip (139) and / or a flat surface of the second lower lip (119) following the bend.

13. A set of building panels according to claim 11 or 12, wherein, The bend includes a right-angled bend.

14. A set of building panels according to any one of the preceding claims 1 to 13, wherein, The first lower lip (139) is disposed in a first plane (H1), and the second lower lip (119) is disposed in a second plane (H2) displaced from the first plane (H1).

15. The set of building panels according to claim 14, wherein, The first plane (H1) is disposed 0.2 to 0.5 mm, preferably approximately 0.3 mm, and more preferably 0.3 mm below the second plane (H2).

16. A set of building panels according to any one of the preceding claims 1 to 15, wherein, When the building panel is disposed in the assembled position, at least one pocket (111, 112, 113, 114, 115, 116, 116') is formed adjacent the first and / or second lower lips (119, 139) between the third edge (13) of one building panel and the fourth edge (14) of an adjacent building panel or between the first edge (11) of one building panel and the second edge (12) of an adjacent building panel, the pocket being configured to receive a sealant, such as wax, and the pocket preferably being configured to distribute the sealant between the third edge (13) and the fourth edge (14) or the first edge (11) and the second edge (12) in response to the assembly of the building panel.

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