Laminated sheet, more particularly for furniture construction in caravans and campervans

Abstract

The invention relates to a laminated sheet, more particularly for furniture construction in caravans and campervans. For the aforementioned purpose, laminated sheets are often produced from a plastic or using formaldehyde-containing materials. Both plastic and formaldehyde are to be considered problematic from an environmental point of view. Therefore, the proposed laminated sheet comprises at least two layers made of a wood material and according to the invention is characterised in that the layers are bonded by means of an adhesive, wherein the adhesive comprises at least a mixture composition of magnesium carbonate, magnesium oxide, magnesium chloride and water.

Description

Laminated board, especially for furniture construction in caravans and mobile homes Description

[0001] The present invention relates to a laminated board, particularly for furniture construction in caravans and mobile homes. The board is particularly suitable for the construction of furniture in kitchen and bedroom areas, but also for the construction of cabinets and room dividers. Description of the invention

[0002] For various applications in a wide range of industries, but especially for the interior fittings of camper vans and caravan trailers, laminated panels made of or containing plastic are generally used. Plastics have the advantage of being able to be produced in any shape and are comparatively lightweight. They are waterproof and generally impact-resistant.

[0003] For example, DE 37 22 873 C2 discloses a process in which a nonwoven fabric containing polypropylene is heated as a carrier layer, a foam serving as an intermediate layer is applied, and bonded to the carrier layer at elevated temperatures. A decorative layer is added.

[0004] From the document DE 17 94 171 C3 a thermoplastic molding compound is known which consists of a mixture of 10 to 90 parts by weight of a linear, thermoplastic polyarylene polyether polysulfone with 90 to 10 parts by weight of an acrylonitrile / butadiene / silylene polymer mixture, and optionally conventional additives.

[0005] It's not uncommon for plastics to be supplemented with metal-based edges, as is known from DE 16 94 545 A. However, plastics in the interior fittings of camping vehicles are no longer in demand among customers. This is due to the lack of sustainability of plastics. In many cases, the interior fittings can simply be disposed of as hazardous waste after reaching their maximum service life. This is expensive.

[0006] When attaching these components, it is also important to note that screwing, for example, to frame structures, is only possible if appropriate mounting points for connecting elements are provided in the laminate panels. Otherwise, damage may occur, rendering the plastic-based laminate unusable. Gluing is often not an option, as adhesives often emit unpleasant off-gassing, which is obviously undesirable in bedrooms.

[0007] To enable the attachment of objects to laminate panels, the invention according to DE 10 2021 104 912 A1 discloses a method for attaching a dowel to a lightweight sandwich panel. This method may be possible in isolated cases, but a more extensive application in many different locations during the interior fitting of a camping vehicle is time-consuming and costly.

[0008] To meet both environmental concerns and the desire for a certain degree of screw pull-out strength, wood was used as a material, although due to its weight disadvantage, it requires appropriate preparation. For example, DE 199 56 587 B4 describes a furniture element made of wood with a large number of longitudinal and transverse grooves on one side. During production, material is removed from the furniture element both to reduce weight and to increase stability, since only a small material thickness is available over the existing length of the furniture element in the area of ​​the longitudinal grooves created during production. so that it is easily bendable. Screws can only be used in the remaining webs, which also creates constraints in the interior design.

[0009] DE 10 2016 122 762 A1 discloses the production of wood-based materials in which, among other things, veneers are bonded with a phenol-formaldehyde resin to form laminates. This type of bonding is off-gassing, and due to the formaldehyde, can only be disposed of in landfills after its service life has been reached, and is even dangerous to humans in the event of a fire. Therefore, such adhesives should be avoided.

[0010] The invention is based on the object of providing a lightweight laminated board, particularly for furniture construction in caravans and mobile homes, which is manufactured using a non-outgassing adhesive. The end product should be easily recyclable, i.e., suitable for the circular economy.

[0011] The problem is solved by the features of claim 1, the subclaims describing further embodiments.

[0012] A prior art laminated board, particularly for furniture construction in caravans and mobile homes, comprises at least two layers of a wood-based material. According to the invention, the laminated board is characterized in that the layers are bonded by means of an adhesive, wherein the adhesive comprises at least one mixture of magnesium carbonate, magnesium oxide, magnesium chloride, and water. This adhesive is non-offgassing and recyclable. Such a board has high pull-out strength and can be screwed to substructures or a vehicle in any way. Surprisingly, such a board is water-resistant, so that it can also be used in a shower or kitchen area without any problems. A laminated board produced with the adhesive has an attractive appearance.The composition of the adhesive is designed in such a way that it has, in the best case, a high flowability in order to ensure easy. To ensure processing and bonding between the layers of the laminate board.

[0013] In a particular embodiment of the laminated board according to the invention, particularly for furniture construction in caravans and mobile homes, the mixture contains 30-75% by mass of magnesium carbonate, 12-30% by mass of magnesium oxide, 12-30% by mass of magnesium chloride, and 1-10% by mass of water. Mixing within these limits ensures high adhesive strength of the adhesive and thus the corresponding durability of the laminated board.

[0014] According to a particular embodiment of the laminated board according to the invention, particularly for furniture construction in caravans and mobile homes, a preferred adhesive composition contains 45-65% by mass of magnesium carbonate, 15-25% by mass of magnesium oxide, 15-25% by mass of magnesium chloride, and 5-10% by mass of water. This allows the adhesive strength to be further increased and the load-bearing capacity of the laminated board to be maximized.

[0015] According to a particular embodiment of the laminated board according to the invention, particularly for furniture construction in caravans and mobile homes, the layers are made of veneer, especially rotary-cut veneer. Veneer is easy to process. It generally absorbs adhesive well, allowing a processable product to be produced quickly.

[0016] According to a further, special embodiment of the laminated board according to the invention, in particular for furniture construction in caravans and mobile homes, with veneer, the veneer is a veneer from plantation plants, in particular bluebell trees. Plantation plants, especially those that grow quickly like the bluebell tree, do not pollute the environment. To prevent the wood material from which the laminated board is made from If the tree population is reduced, it's a good idea to use a tree planted specifically for this purpose. Since the bluebell tree can grow between 2 and 4 meters per year, it's quickly ready for production.

[0017] According to a further embodiment of the laminated board according to the invention, particularly for furniture construction in caravans and mobile homes, the laminated board is cross-laminated. By overlapping the individual wood layers at a 90° angle to each other, the stability of the final product is increased. The fibers within the individual layers act in different directions, allowing for better absorption of bending forces.

[0018] According to a further embodiment of the laminated board according to the invention, particularly for furniture construction in caravans and mobile homes, the laminated board comprises layers of different veneers. This allows the advantages of different wood species in terms of weight, tensile strength, flexural strength, etc., to be combined to adapt the laminated board to the specific requirements of the application.

[0019] According to a further embodiment of the laminated panel according to the invention, particularly for furniture construction in caravans and mobile homes, the veneer is mold-bonded. It is not uncommon for the interior fittings of caravans and mobile homes, as well as other industrial sectors, to require elements that follow a specific shape to enable the best possible use of space. For this purpose, it is advisable to produce pre-defined shapes in advance, rather than subsequently adapting standard shapes by machine. This is possible using mold-bonding.

[0020] Finally, according to a special embodiment of the laminated board according to the invention, particularly for furniture construction in caravans and mobile homes, the laminated board has a thickness of 5 to 20 mm. The thinner the board, the lighter the overall construction, which is playing an increasingly important role, as users sometimes are now restricted by certain driving licenses regarding the maximum total weight of the vehicle. However, for heavily used furniture elements such as tables, greater strength is still required.

[0021] The laminated board according to the invention, particularly for furniture construction in caravans and mobile homes, offers a number of advantages. For example, it can be easily processed using a variety of tools. This includes not only processing with standard woodworking tools and machines such as saws and milling machines, but also, for example, processing with lasers. Furthermore, the laminated board serves as a CO2 storage medium in a functioning circular economy, i.e. the permanent recycling of the once-manufactured board. The most important component in this context is the use of an adhesive that is free of any environmental toxins. In addition to its use in caravans and mobile homes, the laminated board according to the invention can also be used for other motor vehicles, as well as rail vehicles and aircraft.

Claims

Claims 1 . Laminate panel, in particular for furniture construction in caravans and mobile homes, comprising at least two layers of a wood material, characterized in that the layers are bonded by means of an adhesive, wherein the adhesive comprises at least one mixture composition of magnesium carbonate, magnesium oxide, magnesium chloride and water.

2. Laminate board, in particular for furniture construction in caravans and mobile homes, according to claim 1, characterized in that 30 - 75% by mass of magnesium carbonate, 12 - 30% by mass of magnesium oxide, 12 - 30% by mass of magnesium chloride and 1 - 10% by mass of water are used in the mixture composition.

3. Laminate board, in particular for furniture construction in caravans and mobile homes, according to one of the preceding claims, characterized in that in a particularly preferred mixture composition of the adhesive 45 - 65% by mass of magnesium carbonate, 15 - 25% by mass of magnesium oxide, 15 - 25% by mass of magnesium chloride and 5 - 10% by mass of water are used.

4. Laminate panel, in particular for furniture construction in caravans and mobile homes, according to one of the preceding claims, characterized in that the layers are made of veneer, in particular rotary-cut veneer.

5. Laminate panel, in particular for furniture construction in caravans and mobile homes, according to claim 4, characterized in that the veneer is a veneer of plantation plants, in particular bluebell trees.

6. Laminate panel, in particular for furniture construction in caravans and mobile homes, according to one of the preceding claims, characterized in that the laminate panel comprises layers of different veneers.

7. Laminate board, in particular for furniture construction in caravans and mobile homes, according to one of the preceding claims, characterized in that the laminate board is cross-glued. Laminated panel, in particular for furniture construction in caravans and mobile homes, according to one of the preceding claims, characterized in that the veneer is form-bonded. Laminated panel, in particular for furniture construction in caravans and mobile homes, according to one of the preceding claims, characterized in that the laminated panel has a thickness of 5 to 20 mm.