Multilayer composite body

Abstract

The invention relates to a multilayer composite body, comprising a first layer made of at least one polymer material, said first layer having a transmittance for visible light of at least 80%, measured according to DIN EN ISO 13468-2:2006-07, over the thickness of the first layer, and a second layer made of at least one polymer material, containing pigments and / or dyes, optionally light-stability agents, wherein the material of the second layer has at least 0.1 to 8 wt.%, preferably 0.1 to 5 wt.%, based on the total weight, of phyllosilicates, in particular pearlescent pigments comprising mica, aluminum oxide, silicon oxide, calcium aluminum borosilicates, bismuth oxychloride, and mixtures thereof, with a pigment size of 1 µm to 300 µm, preferably 5 µm to 200 µm, according to ISO 13320:2020-01, having at least one coating made of at least one metal oxide, preferably titanium and / or iron (III) and / or lead and / or zirconium oxide, and mixed oxides thereof. The multilayer composite body has a total thickness of approximately 0.3 to 8 mm, preferably 0.5 to 5 mm, and the surface has a ΔL* value of at least -30, preferably at least -50, particularly preferably at least -70, measured via a multi-angle measurement process between -15° and 110° according to DIN 5033-7:2014-10. The invention additionally relates to a furniture panel and to a laminate comprising at least one multilayer composite body.

Description

[0001] Multilayer composite body

[0002] The invention relates to a multilayer composite body comprising a first layer and a second layer. Furthermore, the invention relates to a furniture construction board and a laminate comprising at least one multilayer composite body.

[0003] Such multilayer composite bodies are known from the prior art.

[0004] For example, DE 2 730 899 describes a multi-layer composite body comprising a preferably 50 to 100 μm thick transparent cover layer and a carrier layer, wherein the cover layer consists of polycarbonate, a low-melting thermoplastic polyester, a transparent ABS polymer or PMMA, the carrier layer is preferably more than approximately 500 μm thick and is composed of polyvinyl chloride or a styrene polymer, preferably an impact-modified polystyrene, and the cover layer is firmly bonded to the carrier layer, optionally via one or more intermediate layers, wherein the layer adjacent to the cover layer is either decoratively printed or embossed or colored and embossed on the side facing the cover layer. The polycarbonates are well-known commercially available materials, and the thermoplastic polyesters preferably used are polybutylene terephthalate and / or modified polybutylene terephthalate.Styrene-acrylonitrile copolymers are to be used as ABS polymers. The PMMA is transparent and can be impact-modified.

[0005] Such multi-layer composite bodies are used, for example, in the sanitary sector for the production of shower trays, wash basins and the like, where the hardness, scratch resistance and gloss of the surface are considered to be particularly important and the possibility of repairing surface damage by polishing is to be exploited.

[0006] Furthermore, this multilayer composite body must be designed, for example, by deep drawing, in such a way that both the mechanical and optical properties of the resulting bathtub insert, shower tray, and the like are virtually retained after forming. A disadvantage of this multilayer composite body is that its production is very complex and, depending on the materials used, very costly.

[0007] Another disadvantage is that the use of this multilayer composite body is limited, particularly in the furniture industry for the production of furniture parts with a high-quality, flat surface. This is due in particular to the complex layer structure of this multilayer composite body and the selected material combinations.

[0008] With the multi-layer composite body of the state of the art, it is not possible to produce surfaces that are high-gloss and / or matte.

[0009] Another multilayer composite body is described in DE 202010013841 U1. This multilayer composite body relates to a furniture construction panel, wherein the upper side of a carrier made of wood or wood substitute is bonded to a transparent or satin-finished plastic sheet. The plastic sheet is coated on the underside with a colored varnish, the plastic sheet is coated on the top with a scratch-resistant clear varnish, and the edges of the cut-to-size furniture construction panel are covered with a plastic edge with a glass look. The plastic sheet should be made of acrylic or polycarbonate and have a material thickness of approximately 2 to 4 mm.

[0010] The disadvantage of this multi-layer composite body is that the material required to create a bonded connection with the support made of wood or wood substitute material must be absolutely flat and level, which increases the effort required for this immensely.

[0011] A further disadvantage of this multi-layer composite body is that when the plastic plate, which has a colored lacquer on the back, is glued to the carrier, the lacquer layer is damaged or destroyed, so that the furniture board produced in this way is no longer usable.

[0012] Another disadvantage is that the color stability cannot be guaranteed over long periods of time and that this composite body fails prematurely, especially when exposed to stress caused by different temperatures.

[0013] This is where the invention comes in. Its objective is to overcome the disadvantages of the prior art and to provide a multilayer composite body that is simple and cost-effective to produce, and that can be used, particularly in furniture construction, with a variety of decorative finishes and attractive appearances. The invention also aims to provide a furniture board and a laminate with at least one multilayer composite body.

[0014] According to the invention, the object of providing a multilayer composite body is achieved by the features of claim 1. Further advantageous embodiments are described in the subclaims.

[0015] It has surprisingly been found that a multi-layer composite body comprising a first layer made of at least one polymeric material, wherein the first layer has a transmittance for visible light of at least 80% over its thickness measured according to DIN EN ISO 13468-2:2006-07, a second layer made of at least one polymeric material containing pigments and / or dyes, optionally light stabilizers, wherein the material of the second layer comprises at least 0.1 to 8 wt.%, preferably 0.1 to 5 wt.-%, based on the total weight, of layered silicates, in particular pearlescent pigments comprising mica, mica, aluminum oxide, silicon oxide, calcium aluminum borosilicates, bismuth chloride oxide, and mixtures thereof, with a pigment size of about 1 pm to 300 pm, preferably 5 pm to 200 pm according to ISO 13320:2020-01, which has at least one coating of at least one metal oxide, preferably titanium and / or iron (III) and / or tin and / or zirconium oxide, and mixed oxides thereof, wherein the multilayer composite body has a total thickness of about 0.3 to 8 mm, preferably 0.5 to 5 mm, the surface has an AL* value of at least -30, preferably at least -50, particularly preferably at least -70 measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°, fully solves this problem.It has been advantageously found that, particularly through the type, quantity, and size of the pigments, multilayer composite bodies can be produced. These composite bodies have a top surface with a visually appealing, sophisticated appearance, reminiscent of differently colored anodized, matte metal surfaces. This visually appealing surface is also surprisingly well verifiable via a multi-angle measurement of the L*a*b* color space. The L*a*b* color space within the meaning of this invention (also: CIELAB, CIEL*a*b*, Lab colors) describes all perceivable colors.

[0016] It uses a three-dimensional color space in which the brightness value L* is perpendicular to the color plane (a*, b*). The a-coordinate indicates the chromaticity and color intensity between green and red, and the b-coordinate indicates the chromaticity and color intensity between blue and yellow. The larger the positive a and b values, and the smaller the negative a and b values, the more intense the hue. If a=0 and b=0, the hue is achromatic on the brightness axis.

[0017] In common software implementations, L (lightness) can take values ​​between 0 and 100 and a and b can be varied between -128 and 127.

[0018] In the standard 8-bit model per color channel, 16.7 million possible Lab coordinates are achieved in this way. The actual L*a*b* color space (our color perception) exceeds the aforementioned a / b limits in some areas and does not reach the aforementioned a / b limits in most areas. The most important properties of the L*a*b* color model include device independence and perception-relatedness, meaning that colors are defined, regardless of their generation or reproduction technology, as they are perceived by a normal observer under standard lighting conditions. Surprisingly, an AL* value of at least -30, preferably at least -50, and particularly preferably at least -70, measured using a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°, was determined on the surfaces of the multilayer composite bodies.

[0019] The resulting elegant appearance of the surface of the multi-layer composite bodies can also be realized in various color combinations depending on the pigments used.

[0020] It has proven advantageous for the surface of the multilayer composite bodies to have an AE* value of at least -30, preferably at least -50, and particularly preferably at least -70, measured using a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°. This makes it possible to provide multilayer composite bodies that, on the one hand, exhibit a certain three-dimensional effect due to the first layer of a polymeric material and, on the other hand, radiate a visually appealing metallic effect, a so-called iridescent effect.

[0021] Another advantage of the multilayer composite body is that the first layer has at least one cover layer with a thickness of approximately 2 to 60 μm, preferably 5 to 30 μm. This cover layer, on the one hand, protects the first layer and, on the other hand, enhances the metallic effect produced by the pigments contained in the second layer.

[0022] It is further advantageous for the multilayer composite body that the cover layer comprises at least one acrylic polymer and has a maximum visible light transmittance of approximately 80% across its thickness, measured according to DIN EN ISO 13468-2:2006-07. Such a cover layer achieves optimal surface gloss and a certain 3D effect across the entire surface of the multilayer composite body.

[0023] The multilayer composite body is advantageously further characterized in that the first layer comprises at least one (meth)acrylate copolymer which has a haze of < 0.5 measured according to ASTM D 1003:2021 and a refractive index with a value of approximately 1.49 measured according to DIN EN ISO 489:1999-08.

[0024] However, it is also within the scope of the invention that the first layer comprises at least one polycarbonate (PC) with a refractive index of approximately 1.585; one polystyrene (PS) with a refractive index of approximately 1.58; one styrene acrylonitrile (SAN) with a refractive index of approximately 1.56; one polypropylene (PP) with a refractive index of approximately 1.50; and one polyethylene terephthalate (PET) with a refractive index of approximately 1.57 measured according to DIN EN ISO 489:1999-08, or mixtures thereof.

[0025] The surface of the multi-layer composite body therefore advantageously not only has a certain 3D effect, but the metallic effect is also recognizable to the observer in varying intensity and color strength across the cross-section.

[0026] It has also proven advantageous to arrange at least a third layer on the side of the second layer opposite the first layer. This leads, on the one hand, to improved rigidity of the multilayer composite body and, on the other hand, to good bondability.

[0027] It has further been found advantageous in the multilayer composite body that the third layer comprises at least one styrene polymer, in particular a styrene copolymer, preferably a styrene-acrylonitrile (SAN).

[0028] It is further advantageous that the third layer comprises at least one acrylonitrile-butadiene-styrene copolymer (ABS).

[0029] Another advantage of the multilayer composite body is that the third layer comprises at least one (meth)acrylate copolymer. This makes it possible to produce multilayer composite bodies that are both economical and cost-effective, and that have a visually appealing surface that resembles matte metal surfaces anodized in different colors. A further advantage of the multilayer composite body is that the third layer comprises a blend of acrylonitrile-butadiene-styrene copolymer (ABS) with a proportion of approximately 10 to 90 wt.% styrene-acrylonitrile (SAN), preferably 20 to 80 wt.% styrene-acrylonitrile (SAN), based on the total weight. Such multilayer composite bodies can therefore be produced extremely economically and cost-effectively.

[0030] Another advantage of the multilayer composite body is that the composite material exhibits a processing shrinkage of approximately 0.3 to 0.7%, measured according to DIN EN ISO 294-4:2019-04. This also allows for the economical and cost-effective production of a multilayer composite body that also has a completely flat surface without bulges or similar defects.

[0031] The object of the invention to provide a furniture construction board with at least one multi-layer composite body is achieved by the features of claims 11 and 12.

[0032] The furniture construction board with the multi-layer composite body is surprisingly characterized by the fact that at least one carrier element is arranged on the side of the second layer opposite the first layer. This makes it possible for the first time to provide multi-layer composite bodies with a carrier element, for example, in furniture construction as furniture doors, side panels, furniture bodies, and the like.

[0033] Furthermore, it has surprisingly proven advantageous for the furniture construction panel with at least one multilayer composite body that at least one carrier element, on which at least one further multilayer composite body is arranged, is arranged on the side of the second layer opposite the first layer. This makes it possible to provide furniture components that have visually appealing surfaces with metallic effects on both their front and back sides, which can be produced both economically and cost-effectively, and which can be used for high-quality components, particularly in furniture construction.

[0034] The object of the invention to provide a laminate with at least one multi-layer composite body is achieved by the features of claims 13 to 15. In the laminate with at least one multi-layer composite body, it has proven advantageous that at least one further multi-layer composite body is arranged on the side of the second layer opposite the first layer. In a further embodiment of the laminate with at least one multi-layer composite body, it has proven equally advantageous that at least one further multi-layer composite body is arranged on the side of the third layer opposite the first layer. In a further advantageous embodiment, the laminate with at least one multi-layer composite body is further characterized in that it has at least two multi-layer composite bodies arranged next to one another according to the previous embodiments.

[0035] In particular, by varying the individual multi-layer composite bodies, laminates, components and the like can be made available in a cost-effective and economical manner, which meet all optical as well as static requirements, particularly in the field of furniture construction.

[0036] Alternatively, it is possible for the multilayer composite body, in particular its components, to be produced using a generative manufacturing process, in particular in one piece, for example, by a 3D printing process. For the production of the multilayer composite body, in particular its components, computer-readable, three-dimensional models can advantageously be used. The invention also encompasses a method for generating a computer-readable, three-dimensional model for use in a manufacturing process for a multilayer composite body, in particular its components.In particular, the method also comprises the input of data representing a multi-layer composite body, in particular its components, into a data processing machine and the use of this data to represent multi-layer composite bodies, in particular its components, as three-dimensional models, wherein the three-dimensional model is suitable for use in the production of a multi-layer composite body, in particular its components.

[0037] The multilayer composite body, in particular its components, can be manufactured entirely or partially using a line-by-line or layer-by-layer manufacturing process. A 3D dataset can be used to great advantage during construction or production. The method also includes a technique in which the input data from one or more 3D scanners, which operate either contact-based or contactless, with the latter delivering energy to a multilayer composite body, in particular its components, and receiving the reflected energy, is used to generate a virtual three-dimensional model of a multilayer composite body, in particular its components, using computer-aided design software.The manufacturing process can comprise a generative powder bed process, in particular selective laser melting (SLM), selective laser sintering (SLS), selective heat sintering (SHS), selective electron beam melting (EBM / electron beam additive manufacturing - EBAM), or binder jetting of powder material. The manufacturing process can comprise a generative free-space process, in particular cladding, wax deposition modeling (WDM), contour crafting, metal powder deposition (MPA), plastic powder deposition, cold spraying, electron beam welding (EBW), or melt deposition processes such as fused deposition modeling (FDM) or fused filament fabrication (FFF).The manufacturing process may include a generative liquid material process, in particular stereolithography (SLA), digital light processing (DLP), multi-jet modeling (MJM), polyjet modeling, or liquid composite molding (LCM). Furthermore, the manufacturing process may include other generative layer-building processes, in particular laminated object modeling (LOM), 3D screen printing, or light-controlled electrophoretic deposition.

[0038] The invention will now be described in more detail using these non-limiting embodiments.

[0039] They show:

[0040] Figure 1: perspective view of a multi-layer composite body;

[0041] Figure 2: Sectional view of a furniture board with at least one multi-layer composite body;

[0042] Figure 3: perspective view of a laminate with at least two multi-layer composite bodies;

[0043] Figure 4: Sectional view of a further laminate with at least two multi-layer composite bodies. Figure 1 shows a perspective view of a multi-layer composite body 10, comprising a first layer 1 made of at least one polymeric material, wherein the first layer 1 has a transmittance for visible light of at least 80% across its thickness, measured according to DIN EN ISO 13468-2:2006-07, a second layer 2 made of at least one polymeric material, containing pigments and / or dyes, optionally light stabilizers, wherein the material of the second layer 2 comprises at least 0.1 to 8 wt.%, preferably 0.1 to 5 wt.-%, based on the total weight, of layered silicates, in particular pearlescent pigments comprising mica, mica, aluminum oxide, silicon oxide, calcium aluminum borosilicates, bismuth chloride oxide, and mixtures thereof, with a pigment size of about 1 pm to 300 pm, preferably 5 pm to 200 pm according to ISO 13320:2020-01, which has at least one coating of at least one metal oxide, preferably titanium and / or iron (III) and / or tin and / or zirconium oxide, and mixed oxides thereof, wherein the multilayer composite body 10 has a total thickness of about 0.3 to 8 mm, preferably 0.5 to 5 mm, the surface has an AL* value of at least -30, preferably at least -50, particularly preferably at least -70 measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°.

[0044] In this embodiment, the multilayer composite body 10 is designed such that the material of the second layer 2 comprises approximately 3 wt.%, based on the total weight, of layered silicates, in particular pearlescent pigments comprising mica, with a pigment size of approximately 200 mm according to ISO 13320:1020-01, which has at least one coating of at least one metal oxide, a titanium oxide.

[0045] The multilayer composite body 10 has a total thickness of approximately 3.5 mm.

[0046] The surface of the multi-layer composite body 10 has an AL* value of approximately -50 measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°.

[0047] Furthermore, the multi-layer composite body 10 in this embodiment is designed such that the surface has an AE* value of approximately -55 measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°.

[0048] The multilayer composite body 10 is designed such that the first layer 1 has at least one cover layer 5 with a thickness of approximately 2 to 60 μm, preferably 5 to 30 μm. In this exemplary embodiment, the multilayer composite body 10 is designed such that the cover layer 5 has a thickness of approximately 10 μm.

[0049] Furthermore, the multilayer composite body 10 is designed such that the cover layer 5 comprises at least one acrylic polymer and has a maximum visible light transmittance of approximately 80% across its thickness, measured according to DIN EN ISO 13468-2:2006-07. In this exemplary embodiment, the multilayer composite body 10 is designed such that the cover layer 5 has a maximum visible light transmittance of approximately 75% across its thickness, measured according to DIN EN ISO 13468-2:2006-07.

[0050] The first layer 1 of the multilayer composite body 10 comprises at least one (met)acrylate copolymer which has a haze of < 0.5 measured according to AST D1003:2021, as well as a refractive index with a value of approximately 1.49 measured according to DIN EN ISO 489:1999-08.

[0051] In this exemplary embodiment, the multilayer composite body 10 is designed such that the first layer 1 comprises a polymethyl methacrylate (PMMA), which has a haze of approximately 0.2 measured according to AST D 1003:2021. Furthermore, the multilayer composite body 10 in this exemplary embodiment is designed such that the first layer 1 has a refractive index with a value of approximately 1.49 measured according to DIN EN ISO 489:1999-08.

[0052] Figure 2 shows a sectional view of a furniture board with at least one multi-layer composite body 10.

[0053] The furniture board with at least one multi-layer composite body 10 comprising a first layer 1 made of at least one polymeric material, wherein the first layer 1 has a transmittance for visible light of at least 80% over its thickness as measured according to DIN EN ISO 13468-2:2006-07, a second layer 2 made of at least one polymeric material containing pigments and / or dyes, optionally light stabilizers, wherein the material of the second layer 2 contains at least 0.1 to 8% by weight, preferably 0.1 to 5% by weight.-%, based on the total weight, layered silicates, in particular pearlescent pigments comprising mica, mica, aluminum oxide, silicon oxide, calcium aluminum borosilicates, bismuth chloride oxide, and mixtures thereof, with a pigment size of about 1 pm to 300 pm, preferably 5 pm to 200 pm according to ISO 13320:2020-01, which has at least one coating of at least one metal oxide, preferably titanium and / or iron (III) and / or tin and / or zirconium oxide, and mixed oxides thereof, wherein the multilayer composite body 10 has a total thickness of about 0.3 to 8 mm, preferably 0.5 to 5 mm, the surface has an AL* value of at least -30, preferably at least -50, particularly preferably at least -70 measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°, wherein at the first layer 1 opposite side, of the second layer 2 at least one carrier element 4 is arranged.

[0054] The carrier element 4 is arranged at a distance from the second layer 2 of the multi-layer composite body 10 via a connecting layer 6.

[0055] The multi-layer composite body 10 of the furniture board has a total thickness of approximately 3.0 mm.

[0056] The surface of the multi-layer composite body 10 of the furniture board has an AL* value of approximately -55 measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°.

[0057] Furthermore, the multilayer composite body 10 of the furniture construction board is designed such that the first layer 1 has at least one cover layer 5 with a thickness of approximately 2 to 60 μm, preferably 5 to 30 μm. In this exemplary embodiment, the cover layer 5 has a thickness of 25 μm.

[0058] The multilayer composite body 10 of the furniture construction board is characterized in that the surface of the multilayer composite body 10 has an AE* value of at least -30, preferably at least -50, particularly preferably at least -70, measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°.

[0059] The material of the multilayer composite body 10 of the furniture construction board has a processing shrinkage of approximately 0.3 to 0.7%, measured according to DIN EN ISO 294-4:2019-04. In this exemplary embodiment, the material of the multilayer composite body 10 of the furniture construction board has a processing shrinkage of approximately 0.35%, measured according to DIN EN ISO 294-4:2019-04.

[0060] The carrier element 4 is arranged at a distance from the second layer 2 of the multilayer composite body 10 of the furniture construction board via a connecting layer 6. The connecting layer 6 is designed as an adhesive layer and comprises at least one reactive polyurethane (PUR)-based adhesive. Both single-component and multi-component polyurethane (PUR)-based adhesives can be used here.

[0061] In this embodiment, the support element 4 of the furniture construction board is designed as a so-called MDF board. However, it is also within the scope of the invention for the support element 4 of the furniture construction board to be made of wood, wood-based materials, wood substitutes, polymeric materials, metallic materials, ceramic materials, glass, paper, composite support materials, and the like.

[0062] Figure 3 shows a perspective view of a laminate with at least two multi-layer composite bodies 10,10".

[0063] The multi-layer composite body 10, 10" of the laminate comprising a first layer 1, 1" made of at least one polymeric material, wherein the first layer 1, 1" has a transmittance for visible light of at least 80% over its thickness, measured according to DIN EN ISO 13468-2: 2006-07, a second layer 2, 2" made of at least one polymeric material, containing pigments and / or dyes, optionally light stabilizers, wherein the material of the second layer 2, 2" contains at least 0.1 to 8% by weight, preferably 0.1 to 5% by weight.-%, based on the total weight, of layered silicates, in particular pearlescent pigments comprising mica, mica, aluminum oxide, silicon oxide, calcium aluminum borosilicates, bismuth chloride oxide, and mixtures thereof, with a pigment size of about 1 pm to 300 pm, preferably 5 pm to 200 pm according to ISO 13320:2020-01, which has at least one coating of at least one metal oxide, preferably titanium and / or iron (III) and / or tin and / or zirconium oxide, and mixed oxides thereof, wherein the multilayer composite body 10, 10" has a total thickness of about 0.3 to 8 mm, preferably 0.5 to 5 mm, the surface has an AL* value of at least -30, preferably at least -50, particularly preferably at least -70 measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°, wherein the multilayer composite body 10 is arranged at a distance from the multilayer composite body 10" via at least one connecting layer 6.

[0064] In this exemplary embodiment, the multi-layer composite body 10 of the laminate is designed such that the material of the second layer 2 comprises approximately 2.5 wt.%, based on the total weight, of layered silicate, in particular pearlescent pigments comprising aluminum borosilicates, with a pigment size of approximately 200 pm according to ISO 13320: 2020-01, which has at least one coating of a metal oxide, a zirconium oxide, wherein the multi-layer composite body 10 has a total thickness of approximately 6.5 mm, the surface has an AL* value of approximately -78 measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°.

[0065] In this exemplary embodiment, the multi-layer composite body 10' of the laminate is designed such that the material of the second layer 2' comprises approximately 4% by weight, based on the total weight, of layered silicate, in particular pearlescent pigments comprising bismuth chloride oxide, with a pigment size of approximately 180 pm according to ISO 13320: 2020-01, which has at least one coating of a metal oxide, an iron (III) oxide, wherein the multi-layer composite body 10' has a total thickness of approximately 4 mm, the surface has an AL* value of approximately -65 measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°.

[0066] The multilayer composite body 10 of the laminate is formed such that the first layer 1 has at least one cover layer 5 with a thickness of approximately 2 to 60 μm, preferably 5 to 30 μm. In this embodiment, the cover layer 5 has a thickness of approximately 15 μm.

[0067] The cover layer 5 of the multilayer composite body 10 of the laminate is designed such that it comprises at least one acrylic polymer and has a transmittance of approximately 72 for visible light across its thickness, measured according to DIN EN ISO 13468 -2:2006 - 07.

[0068] The connecting layer 6 between the multilayer composite body 10 and the multilayer composite body 10' of the laminate is designed as an adhesive layer and fixes the multilayer composite bodies 10, 10' to form a laminate.

[0069] The connecting layer 6 comprises at least one reactive hot melt adhesive based on polyurethane (PUR) with an application quantity of approximately 30 to 150 g / m 2 , preferably 40 to 80 g / m 2 In this example, with an application quantity of approximately 50 g / m 2 .

[0070] Figure 4 shows a sectional view of a further laminate with at least two multi-layer composite bodies 10, 10'. The multi-layer composite body 10, 10' comprises a first layer 1, 1' made of at least one polymeric material, wherein the first layer 1, 1' has a transmittance for visible light of at least 80% across its thickness, measured according to DIN EN ISO 13468-2:2006-07, a second layer 2, 2' made of at least one polymeric material, containing pigments and / or dyes, optionally light stabilizers, wherein the material of the second layer 2, 2' comprises at least 0.1 to 8% by weight, preferably 0.1 to 5% by weight.-%, based on the total weight, of layered silicates, in particular pearlescent pigments comprising mica, mica, aluminum oxide, silicon oxide, calcium aluminum borosilicates, bismuth chloride oxide, and mixtures thereof, with a pigment size of about 1 pm to 300 pm, preferably 5 pm to 200 pm according to ISO 13320:2020-01, which has at least one coating of at least one metal oxide, preferably titanium and / or iron (III) and / or tin and / or zirconium oxide, and mixed oxides thereof, wherein the multilayer composite body 10, 10' has a total thickness of about 0.3 to 8 mm, preferably 0.5 to 5 mm, the surface has an AL* value of at least -30, preferably at least -50, particularly preferably at least -70 measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°, wherein the multilayer composite body 10 is arranged at a distance from the multilayer composite body 10' via at least one connecting layer e.

[0071] In this exemplary embodiment, the multi-layer composite body 10 of the laminate is designed such that the material of the second layer 2 comprises approximately 4 wt.%, based on the total weight, of layered silicate, in particular pearlescent pigments comprising mica, with a pigment size of approximately 120 pm according to ISO 13320: 2020-01, which has at least one coating of a metal oxide, a tin oxide, wherein the multi-layer composite body 10 has a total thickness of approximately 5 mm, the surface has an AL* value of approximately -75 measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°.

[0072] In this exemplary embodiment, the multi-layer composite body 10' of the laminate is designed such that the material of the second layer 2' comprises approximately 4% by weight, based on the total weight, of layered silicate, in particular pearlescent pigments comprising bismuth chloride oxide, with a pigment size of approximately 180 pm according to ISO 13320: 2020-01, which has at least one coating of a metal oxide, an iron (III) oxide, wherein the multi-layer composite body 10' has a total thickness of approximately 4 mm, the surface has an AL* value of at least -65 measured via a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°.

[0073] The multilayer composite body 10 of the laminate is formed such that the first layer 1 has at least one cover layer 5 with a thickness of approximately 2 to 60 μm, preferably 5 to 30 μm. In this exemplary embodiment, the cover layer 5 of the multilayer composite body 10 has a thickness of approximately 15 μm.

[0074] The cover layer 5 of the multilayer composite body 10 of the laminate is designed such that it comprises at least one acrylic polymer and has a transmittance of approximately 72 for visible light across its thickness, measured according to DIN EN ISO 13468-2:2006 - 07.

[0075] The multi-layer composite body 10, 10' of the laminate is further designed such that at least one third layer 3, 3' is arranged on the side of the second layer 2, 2' opposite the first layer 1, T

[0076] The layer 3 of the multilayer composite body 10 of the laminate comprises at least one styrene polymer, in particular a styrene copolymer, preferably a styrene-acrylonitrile (SAN).

[0077] In an advantageous embodiment, the third layer 3 of the multilayer composite body 10 of the laminate is designed such that it comprises at least one acrylonitrile-butadiene-styrene copolymer (ABS).

[0078] The layer 3' of the multilayer composite body 10' of the laminate comprises a blend of acrylonitrile-butadiene-styrene copolymer (ABS) with a proportion of approximately 10 to 90 wt.% styreneacrylonitrile (SAN), preferably 20 to 80 wt.% styreneacrylonitrile (SAN).

[0079] In this embodiment, the third layer 3' of the multilayer composite body 10' of the laminate has a proportion of approximately 45 wt.% styrene-acrylonitrile.

[0080] The material of the respective composite body 10, 10' of the laminate exhibits a processing shrinkage of approximately 0.3 to 0.7%, measured according to DIN EN ISO 294-4:2019-04. In this exemplary embodiment, the material of the composite body 10 of the laminate exhibits a processing shrinkage of approximately 0.38%, and the material of the composite body 10' of the laminate exhibits a processing shrinkage of approximately 0.41%, both measured according to DIN EN ISO 294-4:2019-04. The connecting layer 6 between the multilayer composite body 10 and the multilayer composite body 10' is designed as an adhesive layer and fixes the multilayer composite bodies 10, 10' to form a laminate.

[0081] The connecting layer 6 comprises at least one reactive hot melt adhesive based on polyurethane (PUR) with an application quantity of approximately 30 to 150 g / m 2 , preferably 40 to 80 g / m 2In this embodiment, the application quantity of the connecting layer 6, which is designed as a reactive hot melt adhesive based on polyurethane (PU R), is approximately 45 g / m 2 .

Claims

Claims for multilayer composite body (10,10') comprising: • a first layer (1,1') made of at least one polymeric material, wherein the first layer (1,T) has a transmittance of at least 80% over its thickness for visible light as measured according to DIN EN ISO 13468-2:2006-07, • a second layer (2, 2') of at least one polymeric material containing pigments and / or dyes, optionally a light stabilizer, wherein the material of the second layer (2, 2') comprises at least 0.1 to 8 wt.%, preferably 0.1 to 5 wt.%, based on the total weight, layered silicates, in particular pearlescent pigments comprising mica, aluminum oxide, silicon dioxide, calcium aluminum borosilicates, bismuth chloride oxide, and mixtures thereof, with a pigment size of about 1 pm to 300 pm, preferably 5 pm to 200 pm according to ISO 13320:2020-01, which comprises at least one coating of at least one metal oxide, preferably titanium and / or iron(III) and / or tin and / or zirconium oxide, and mixed oxides thereof, wherein the multilayer composite body (10, 10') • a total thickness of approximately 0.3 to 8 mm, preferably 0.5 to 5 mm, • the surface has an AL* value of at least -30, preferably at least -50, particularly preferably at least -70, measured by a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°. Multilayer composite body (10, 10') according to claim 1, characterized in that the surface has an AE* value of at least -30, preferably at least -50, particularly preferably at least -70, measured by a multi-angle measurement according to DIN 5033-7:2014-10 between -15° and 110°.

3. Multilayer composite body (10,10') according to one of the preceding claims, characterized in that the first layer (1 ,T) has at least one cover layer (5) with a thickness of about 2 to 60 pm, preferably 5 to 30 pm.

4. Multilayer composite body (10,10') according to one of the preceding claims, characterized in that the top layer (5) comprises at least one acrylic polymer and has a transmission coefficient of at most about 80% for visible light over its thickness as measured according to DIN EN ISO 13468-2:2006-07.

5. Multilayer composite body (10,10') according to one of the preceding claims, characterized in that the first layer (1 ,T) comprises at least one (meth)acrylate copolymer which has a haze of < 0.5 measured according to ASTM D 1003, and a refractive index of about 1.49 measured according to DIN EN ISO 489:1999-08.

6. Multilayer composite body (10,10') according to one of claims 1 to 5, characterized in that at least a third layer (3,3') is arranged on the side of the second layer (2,2') opposite the first layer (1 ,T).

7. Multilayer composite body (10,10') according to claim 6, characterized in that the third layer (3,3') comprises at least one styrene polymer, in particular a styrene copolymer, preferably a styrene acrylonitrile (SAN).

8. Multilayer composite body (10,10') according to claim 6, characterized in that the third layer (3,3') comprises at least one acrylonitrile butadiene styrene copolymer (ABS).

9. Multilayer composite body (10,10') according to claim 6, characterized in that the third layer (3,3') comprises a blend of acrylonitrile butadiene styrene copolymer (ABS) with a proportion of about 10 to 90 wt.% styrene acrylonitrile (SAN), preferably 20 to 80 wt.% styrene acrylonitrile (SAN), based on the total weight.

10. Multilayer composite body (10,10') according to claim 6, characterized in that the material of the composite body (10,10') has a processing shrinkage of about 0.3 to 0.7% measured according to DIN EN ISO 294-4:2019-04. Furniture panel with at least one multilayer composite body (10, 10') according to any one of claims 1 to 10, characterized in that at least one support element (4) is arranged on the side opposite the first layer (1, T) of the second layer (2, 2'). Furniture panel with at least one multilayer composite body (10, 10') according to any one of claims 1 to 10, characterized in that at least one support element (4) is arranged on the side opposite the first layer (1, T) of the second layer (2, 2'), to which at least one further multilayer composite body is attached. (10') is arranged. A minat with at least one multilayer composite body (10, 10') according to any one of claims 1 to 10, characterized in that at least one further multilayer composite body (10') is arranged on the side opposite the first layer (1, T) of the second layer (2, 2'). A minat with at least one multilayer composite body (10, 10') according to any one of claims 1 to 10, characterized in that at least one further multilayer composite body (10') is arranged on the side opposite the first layer (1, T) of the third layer (3, 3'). A minat with at least two multilayer composite bodies (10, 10') arranged adjacent to one another according to any one of claims 1 to 10.

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