DE202014106167U1 - Edging strip for furniture - Google Patents

Abstract

An edge strip (1) for furniture, comprising at least one enamel layer (3, 3 ') and a structural layer (2) connected to the enamel layer (3), both of which at least partially comprise a polymeric material, and at least one functional layer (5) in that the functional layer (5) contains both polar and nonpolar fractions in the molecular structure and is arranged at a distance from the structural layer (2) via the melt layer (3 3 '), at least partially covering it, wherein the material of the functional layer (5) is selected is from the group of polymer solutions or polymer dispersions, in particular the solvent-containing or preferably aqueous polymer solutions or polymer dispersions.

Description

The invention relates to an edge strip for furniture, comprising a melt layer and a structural layer connected to the melt layer, both of which at least partially comprise a polymeric material, and at least one functional layer.

It has been known for many years from the prior art that plastic edges are usually applied to edges of wood-based panels by suitable machines. In this case, an adhesive bond is often realized, which is either a so-called. Hot melt adhesive, which is rolled on the plastic edge in a continuous process or by an adhesive that has been previously applied to the plastic edge, for example, by a subsequent coating, by coextrusion and the like and be liquefied again by means of an energy input and then pressed or welded together with the edge to the narrow side of a furniture panel.

A generic edge strip for furniture is for example in the EP 1 163 864 B1 disclosed. This plastic edge consists of plastic layers of different hardness, wherein a region of greater hardness of the plastic edge has a thickness more than twice as large as a region of lower hardness. This plastic edge consists for example of the material acrylonitrile-butadiene-styrene (ABS) or polyvinyl chloride (PVC). Furthermore, this plastic edge can also consist of polyethylene (PE). This plastic edge is further formed so that it is melted by means of an energy input, for example via a diode laser or a semiconductor laser on its surface and the plastic edge is then joined with its molten surface on a panel body. The advantage of this plastic edge should be that only a thin layer of the plastic edge is melted by laser application and fused with the panel body, while the remaining thicker layer of the plastic edge is held in the solid phase state.

It is a plastic edge used, the areas of different hardness has, in particular, a coextruded thermoplastic edge is used. The layer of plastic edge facing the panel body is softer and easier to reflow, i. it has a lower melting point than the hard outer layer of the plastic edge.

A disadvantage of this edge is seen that when introducing the laser energy beam powers in the range of 100 W and more are required to melt the thin layer of the plastic edge over the entire surface and in a penetration depth of about 0.2 to 0.5 mm. The required power of the laser used can cause the melted thin layer of the plastic edge is thermally stressed or damaged so that a subsequent bonding or welding with the furniture panel is no longer possible. Another disadvantage of the disclosed plastic edge is that the strength of the achievable cohesive connection between the thin, molten layer of the plastic edge and the narrow side of the furniture panel no longer meet today's requirements.

A further disadvantage of this plastic edge is that the energy input required for the melting of the thin layer is absorbed, for example, by laser energy through the entire plastic edge and converted into heat. This is particularly disadvantageous for this disclosed plastic edge, if it is to be used in so-called free-form machining, for example in the production of, in particular, circular pieces of furniture.

Another disadvantage of this prior art plastic edge is that the disclosed melt layer can only be fused by the introduction of a single energy in the form of laser light. For conventional bonding of the plastic edge with known hot melt adhesives this plastic edge is not suitable.

This is where the invention, which has set itself the task to show an edge strip for furniture, which is inexpensive and economical to produce, which is reliably attachable to furniture and both in the so-called. Automatic continuous flow method as well as in so-called. Freeformbearbeitungen with all known enamel layers can be used.

This is realized by an edge strip with the features of claim 1 and a piece of furniture with the features of claim 10. Further advantageous embodiments are described in the subclaims.

It has surprisingly been found that an edge strip for pieces of furniture comprising at least one enamel layer and structural layer connected to the enamel layer, both of which at least partially comprise a polymeric material, and at least one functional layer is characterized in that the functional layer is chemically modified such that it contains both polar and nonpolar portions in the molecular structure and via the melt layer, this at least partially reflecting, is arranged spaced from the structural layer, wherein the material of the functional layer is selected from the group of polymer solutions or polymer dispersions, in particular the solvent-containing or preferably aqueous polymer solutions or polymer dispersions. Surprisingly, by means of the functional layer arranged at a distance from the structure layer over the melt layer, the edge strip according to the invention can be attached to all the currently known production lines for attaching edge strips to the narrow sides of furniture pieces. In particular, for the innovative attachment of such inventive edge strips of furniture over the entry of energy via, for example, laser energy edge strip according to the invention can be reliably and easily attached to the narrow sides of the furniture. It has further surprisingly been found that the edge strip according to the invention selects known melt adhesive and entry of energy from the group consisting of laser, infrared source, ultrasonic source, magnetic field source, microwave source, plasma source and fumigation, this energy is absorbed or absorbed so that melted the melt layer and the edge strip according to the invention is integrally attached to the narrow side of the piece of furniture. Thus, the edge strip according to the invention is universally suitable for all currently known methods for attachment to the narrow sides of pieces of furniture, which in particular significantly reduces the cost of edgeband manufacturer but also the storage of furniture or furniture manufacturers.

It has also proved to be extremely advantageous that the material of the functional layer is selected from the group of polyurethanes (PUR), acrylates, chloroprenes, epoxy resins, ethylene vinyl acetates (for example EVA dispersions), polyvinyl acetates (PVAC dispersions). and the like, as well as mixtures of two or more of the aforementioned substances. The material of the functional layer can be applied to the melt layer both in the direct production of the edge strip according to the invention. However, it is also within the scope of the invention that the functional layer can be applied to the narrow side of furniture directly before attaching the edge strip according to the invention. The edge strip for furniture according to the invention is thus applicable to all currently known manufacturing equipment for attaching edge strips to the narrow sides of furniture.

• – ca. 10 bis 20 Gew.-% Bindemittel, vorzugsweise nachchloriertes Polyvinylchlorid (PVC), Ethylenvinylacetat (EVAC), Polyurethan (PUR),
• – ca. 10 bis 40 Gew.-% Füllstoffe, vorzugsweise Carbonate, Silikate, Kieselsäure, Erdalkalisulfate sowie Farbpigmente, vorzugsweise Metalloxide wie Titanoxid (TiO₂);
• – ca. 40 bis 80 Gew.-% Lösemittel, vorzugsweise organische Lösemittel, bevorzugt auf Ester- bzw. Ketonbasis oder vorzugsweise anorganische Lösemittel, bevorzugt Wasser.

In a further advantageous embodiment of the edge strip according to the invention, the functional layer comprises:

• 10 to 20% by weight of binder, preferably postchlorinated polyvinyl chloride (PVC), ethylene vinyl acetate (EVAC), polyurethane (PUR),
• - About 10 to 40 wt .-% fillers, preferably carbonates, silicates, silica, alkaline earth sulfates and color pigments, preferably metal oxides such as titanium oxide (TiO ₂ );
• - About 40 to 80 wt .-% solvent, preferably organic solvents, preferably based on ester or ketone or preferably inorganic solvents, preferably water.

As a result of this selection of the various materials and the different amounts, the edge strip according to the invention can be produced cost-effectively and economically and can be optimized individually for each production method for attachment to the narrow sides of the pieces of furniture.

It has further been found to be advantageous that the functional layer of the edge strip according to the invention has a thickness of about 0.1 μm to 100 μm, preferably 0.2 μm to 75 μm, particularly preferably 0.5 to 30 μm. This advantageously leads, in addition to an economical and cost-effective production of the edge strip according to the invention, to the fact that the functional layer of the respective geometry of the edge strip according to the invention is optimally adaptable.

In a further advantageous embodiment, the edge strip according to the invention is designed such that the functional layer has a density of about 0.5 g / m ³ to 1.2 g / m ³ , preferably about 0.7 g / m ³ to 1 g / m ³ having. This advantageously leads to the fact that the functional layer in different materials of the melt layer is adaptable and thus inexpensive and economically applicable.

In a preferred embodiment of the edge strip according to the invention, the material of the structural layer and / or the melt layer contains at least one of the following additives: stabilizers for improving the resistance to light, UV radiation and weathering; Stabilizers for improving the thermal and thermal oxidative resistance; Stabilizers for improving the hydrolytic resistance, stabilizers for improving the acidolytic resistance, lubricants, mold release agents, coloring additives, crystallization-regulating substances and nucleating agents, flame retardants, impact modifiers, fillers and / or plasticizers.

Another advantage of the edge strip according to the invention is that the structural layer and / or the melt layer is based on polymeric materials. By polymeric material is meant materials such as polyvinyl chloride (PVC); Polyolefin, such as polypropylene (PP) or polyethylene (PE) ; styrene-based polymer such as polystyrene (PS) or styrene-butadiene copolymer predominantly styrene (SB) or acrylonitrile-styrene-acrylic ester copolymers (ASA) or acrylonitrile-butadiene-styrene copolymers (ABS) or styrene-acrylonitrile (SAN); Polybutylene terephthalate (PBT); Polyethylene terephthalate (PET); Polyoxymethylene (POM); Polyamide (PA); Polymethyl methacrylate (PMMA); Polyphenylene oxide (PPO); Polyetheretherketone (PEEK); Polyphenylene sulfide (PPS); Liquid Crystal Polymer (LCP); Polyamide-imides (PAI); Polyvinylidene fluoride (PVDF); Polyphenylsulfone (PPSU); Polyaryletherketone (PAEK); Polyacrylonitrile (PAN); Polychlorotrifluoroethylene (PCTFE); Polyether ketone (PEK); Polyimide (PI); Polyisobutene (PIB); Polyphthalamide (PPA); Polypyrrole PPY); polytetrafluoroethylene (PTFE); Polyurethane (PUR); Polyvinyl alcohol (PVA); Polyvinyl acetate (PVAC); Polyvinylidene chloride (PVDC); and mixtures of at least two of these materials. In this case, the polymer material suitable fillers and / or reinforcing materials may be added, which positively affect the mechanical properties, in particular glass fibers, glass beads but also fillers such as chalk, Teflon and the like. The fillers and / or reinforcing materials are contained in amounts of about 5 to 50 wt .-%, preferably 10 to 35 wt .-%, based on the total mass.

Also in an advantageous embodiment of the edge strip according to the invention, the melt layer is based on thermoplastic, in particular non-reactive hot melt adhesives, in particular based on ethylene vinyl acetate (EVAC); Polyolefin (PO) such as polyethylene (PE); amorphous polyalphaolefin (APAO); polyacrylate; Polyamide (PA); Copolyamide (CoPA); copolyester; thermoplastic polyester elastomers (TPE-E), thermoplastic polyurethane elastomers (TPE-U) or their corresponding co- and / or terpolymers; and mixtures of at least two of these materials.

In a further advantageous embodiment, the edge strip according to the invention is designed such that no, one or more intermediate layers are provided between the structural layer and the melt layer. This advantageously leads to the fact that the different materials of the structural layer and / or the melt layer can be produced either directly in the production process of coextrusion without an intermediate layer. However, it is also within the scope of the invention that an additional functional layer is arranged between a structural layer and a melt layer of the edge strip according to the invention, which optimizes the cohesive connection between the structural layer and the melt layer.

The edge strip according to the invention is further characterized in that the material of the melt layer is a copolymer, preferably a graft copolymer, preferably a maleic anhydride-grafted polyolefin. Particularly advantageous is the material of the melt layer is a maleic anhydride-grafted polypropylene.

The edge strip according to the invention is advantageously also designed so that the melt layer has both polar and nonpolar portions in the molecular structure, i. that the material of the melt layer is chemically modified so that it has both polar and non-polar parts in the molecular structure.

In a further advantageous embodiment of the edge strip according to the invention, the melt layer contains light and / or radiation-absorbing additives, preferably laser-absorbing pigments. Here, the melt layer of the edge strip according to the invention advantageously contains additives selected from the group of metal oxides, the metal phosphates and the metal salts of organic anions. In particular, amounts of about 0.01 to 5 wt .-%, based on their total weight, have proven to be advantageous.

The invention further relates to a piece of furniture with an edge strip according to the invention with the described features, this being characterized in that the underside of the edge strip according to the invention is fully bonded to the edge of the piece of furniture materially.

The invention will now be described in more detail with reference to these non-limiting embodiments.

Show it:

1 FIG. 2: schematic sectional view of a piece of furniture and an edge strip according to the invention to be attached thereto, FIG.

2 : schematic sectional view of a piece of furniture and attached thereto, edge strip according to the invention.

3 : schematic sectional view of a piece of furniture and attached thereto, another edge strip according to the invention.

The edge strip according to the invention 1 for furniture 4 includes a melt layer 3 and one with the melt layer 3 connected structure layer 2 as well as the functional layer 5 ,

The functional layer 5 has both polar and non-polar parts in the molecular structure and is above the melt layer 3 at least partially covering them, from the structural layer 2 spaced apart. The material of functional layer 5 may be selected from the group of polymer solutions or polymer dispersions, in particular the solvent-containing or preferably aqueous polymer solutions or polymer dispersions. In this embodiment, the structural layer is 2 made of the polymeric material polypropylene and the material of the melt layer is also a polypropylene, which, however, in this embodiment has both polar and nonpolar portions in the molecular structure, ie that of the material of the melt layer 3 is so chemically modified that it contains both polar and non-polar components in the molecular structure.

The functional layer 5 is in this embodiment selected from the group of polyurethanes and has a first component which is mixed with mineral fillers. After an oxidative treatment of the enamel layer intended for bonding 3 becomes the functional layer on its surface 5 applied, which is added from a first component in the form of a solution of polyurethane in organic solvents with mineral constituents and a second component consisting of an isocyanate. The functional layer 5 can be applied very easily.

This can be realized in the per se known extrusion or coextrusion process as part of a subsequent coating, but it is also within the scope of the invention that this coating can be realized outside of an extrusion or coextrusion line. The polyurethane of the first component of the functional layer 5 For example, it may be a hydroxy-polyester urethane dissolved in organic solvents such as light and medium boiling esters, ketones and aromatics, or mixtures of such solvents. As mineral constituents of the first component of the functional layer 5 For example, carbonates, silicates, silicic acid, alkaline earth sulfates are used. These components serve to increase an adhesive surface of the melt layer 3 , The proportion of organic solvents of the first component of the functional layer 5 is about 50 to 95, preferably 75 to 90 wt .-%, based on their total weight. In the first component of the functional layer 5 the ratio of hydroxyl-polyester-urethane to mineral constituents is between 100: 50 and 100: 200 wt .-%, based on their total weight. The isocyanate of the second component of the functional layer 5 is suitably an aromatic or aliphatic isocyanate or mixtures thereof. This is a di- or polyfunctional isocyanate, preferably reaction products with trimethylolpropane having an NCO content of about 15 to 25%. The isocyanate of the second component of the functional layer 5 is preferably used in pure form or as a 50 to 75% solution. The proportion of the second component of the functional layer 5 is about 5 to 30%, based on the solids content of the first component.

• Erste Komponente: 10 Gew.-% Hydroxy-Polyester-Urethan, 10 Gew.-% feinteilige Kieselsäure, 1 Gew.-% Titandioxid, 20 Gew.-% Toluol, 30 Gew.-% Methyl-Ethyl-Keton, 20 Gew.-% Ethylacetat.
• Zweite Komponente: 2,5 Gew.-% aromatisches Triisocyanat 75%ig in Ethylacetat gelöst mit 13 % NCO-Gehalt

In this embodiment, for the individual components of the functional layer 5 the following composition was chosen:

• First component: 10 wt .-% hydroxy-polyester urethane, 10 wt .-% finely divided silica, 1 wt .-% titanium dioxide, 20 wt .-% toluene, 30 wt .-% methyl ethyl ketone, 20 wt. -% ethyl acetate.
• Second component: 2.5% by weight of aromatic triisocyanate 75% dissolved in ethyl acetate with 13% NCO content

The thickness of this functional layer 5 is in this embodiment about 15 microns, wherein the functional layer has a density of about 0.9 g / m ³ .

The edge strip according to the invention 1 can now in a conventional manner to the narrow sides 40 of furniture 4 cohesively attached. On the one hand, this can be realized by introducing energy, for example of laser energy, through the functional layer 5 the melt layer 3 is activated or melted and that the edge strip according to the invention 1 over the melted melt layer 3 with the narrow side 40 of the furniture 4 is connected cohesively.

The edge strip according to the invention 1 but can also continue to be used in that in known machines for the material attachment of edge strips 1 on narrow sides 40 of furniture 4 now an activation of the functional layer 5 takes place and that on the activated functional layer 5 now a known hot melt adhesive in particular based on ethylene vinyl acetate (EVAC); Polyolefin (PO) such as polyethylene (PE); amorphous polyalphaolefin (APAO); polyacrylate; Polyamide (PA); Copolyamide (CoPA); copolyester; thermoplastic polyester elastomers (TPE-E), thermoplastic polyurethane elastomers (TPE-U) or their corresponding co- and / or terpolymers; and mixtures of at least two of these materials, can be applied and with the help of which the edge strip according to the invention 1 on the narrow side 40 of the furniture 5 cohesively attachable. In this advantageous embodiment of the edge strip according to the invention, the structural layer 2 the same color as the enamel layer 3 while the functional layer 5 transparent or transparent.

Thus, the thus formed edge strip according to the invention for all currently known processing technologies for attachment to the narrow sides 40 of furniture 4 be used. It is also within the scope of the invention that the functional layer 5 both in the manufacturing process of the edge strip according to the invention 1 can be applied online or offline by, for example, a post-coating.

Furthermore, it is in the edge strip according to the invention 1 possible that the functional layer 5 only shortly before processing on the edge banding machine or during processing on the edge banding machine on the melt layer 3 is applied.

In the 2 is an edge strip 1 for furniture 4 represented, which cohesively on the narrow side 40 of the furniture 4 is fixed.

The edge strip 1 has a melt layer 3 and one with the melt layer 3 connected structure layer 2 on. In this embodiment, the functional layer is 5 according to 1 over the melt layer 3 at least partially covering them, from the structural layer 2 is spaced apart and by the cohesive attachment and melting of the melt layer 3 no longer recognizable. In this embodiment, for melting the melt layer 3 Energy has been used in particular laser energy, so that by the energy input originally applied functional layer 5 is no longer recognizable and the edge strip 1 over the melted melt layer 3 on the narrow side 40 of the furniture 4 is firmly bonded.

In the 3 is another edge strip according to the invention 1 on the narrow side 40 a piece of furniture 4 shown.

The edge strip according to the invention 1 includes a melt layer 3 and one with the melt layer 3 connected structure layer 2 , The edge strip according to the invention 1 also has a functional layer 5 on top of that, the enamel layer 3 at least partially covering, from the structural layer 2 spaced apart.

The functional layer 5 is in this embodiment, an aqueous polymer dispersion based on ethylene vinyl acetate. The functional layer 5 comprises in this embodiment about 20 wt .-% binder based on ethylene vinyl acetate, 10 wt .-% fillers based on silica and preferably metal oxide such as titanium oxide (TiO ₂ ) and about 70 wt .-% solvent, preferably water.

The edge strip according to the invention 1 has in this embodiment at the narrow side 40 of the furniture 4 opposite side of the functional layer 5 another enamel layer 3 ' on. The melt layer 3 ' is in this embodiment thermoplastic, non-reactive hot melt adhesive based on ethylene vinyl acetate (EVAC), over which the edge strip according to the invention 1 with the narrow side 40 of the furniture 4 is connected cohesively. The structural layer 2 the edge strip according to the invention is in this embodiment of the polymeric material acrylonitrile-butadiene-styrene (ABS) and with the structural layer 2 connected melt layer 3 is in this embodiment, a thermoplastic polyurethane (TPU), wherein between these layers and a functional layer 5 can be arranged.

The structural layer 2 , the enamel layer associated with it 3 as well as those at the functional layer 5 arranged melt layer 3 ' have the same color in this embodiment, so that the different layers of the edge strip according to the invention 1 are not visible. However, it is also within the scope of the invention that between the melt layer 3 and the structural layer associated with it 2 one or more intermediate layers are provided which provide an even more optimal connection or adhesion of the melt layer 3 at the connected structural layer 2 to ensure.

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• EP 1163864 B1 [0003]

Claims (10)

Edge strip ( 1 ) for furniture comprising at least one enamel layer ( 3 . 3 ' ) and one with the melt layer ( 3 ) associated structural layer ( 2 ), both of which at least partially comprise a polymeric material, as well as at least one functional layer ( 5 ), characterized in that the functional layer ( 5 ) contains both polar and nonpolar portions in the molecular structure and via the melt layer ( 3 3 ' ), at least partially covering them, from the structural layer ( 2 ) is arranged at a distance, wherein the material of the functional layer ( 5 ) is selected from the group of polymer solutions or polymer dispersions, in particular the solvent-containing or preferably aqueous polymer solutions or polymer dispersions. Edge strip ( 1 ) according to claim 1, characterized in that the material of the functional layer ( 5 ) is selected from the group of polyurethanes (PUR), acrylates, chloroprene, epoxy resins, ethylene vinyl acetates (EVAC dispersions), polyvinyl acetates (PVAc dispersions) and the like, as well as mixtures of two or more of the aforementioned substances. Edge strip ( 1 ) according to one of the preceding claims, characterized in that the functional layer ( 5 ) comprises: - about 10 to 20% by weight of binder, preferably postchlorinated polyvinyl chloride (PVC), ethylene vinyl acetate (EVAC), polyurethane (PUR), - about 10 to 40% by weight of fillers, preferably carbonates, silicates, silica , Alkaline earth sulfates and color pigments, preferably metal oxides such as titanium oxide (TiO ₂ ); - About 40 to 80 wt .-% solvent, preferably organic solvents, preferably based on ester or ketone or preferably inorganic solvents, preferably water. Edge strip ( 1 ) according to one of the preceding claims, characterized in that the functional layer ( 5 ) has a thickness of about 0.1 μm to 100 μm, preferably 0.2 μm to 75 μm, particularly preferably 0.5 to 30 μm. Edge strip ( 1 ) according to one of the preceding claims, characterized in that the material of the structural layer ( 2 ) contains at least one of the following additives: stabilizers to improve the resistance to light, UV radiation and weathering; Stabilizers for improving the thermal and thermal oxidative resistance; Stabilizers for improving the hydrolytic resistance, stabilizers for improving the acidolytic resistance, lubricants, mold release agents, color additives, crystallization-regulating substances and nucleating agents, flame retardants, impact modifiers, fillers and / or plasticizers. Edge strip ( 1 ) according to one of the preceding claims, characterized in that the melt layer ( 3 . 3 ' ) on thermoplastic, in particular non-reactive hot melt adhesives, in particular based on ethylene vinyl acetate (EVAC); Polyolefin (PO) such as polyethylene (PE); amorphous polyalphaolefin (APAO); polyacrylate; Polyamide (PA); Copolyamide (CoPA); copolyester; thermoplastic polyester elastomers (TPE-E), thermoplastic polyurethane elastomers (TPE-U) or their corresponding co- and / or terpolymers; and mixtures of at least two of these materials. Edge strip ( 1 ) according to one of the preceding claims, characterized in that between the structural layer ( 2 ) and the melt layer ( 3 . 3 ' ) none, one or more intermediate layers are provided. Edge strip ( 1 ) According to one of the preceding claims, characterized in that the material of the enamel layer ( 3 ) is a copolymer, preferably a graft copolymer, preferably maleic anhydride grafted polypropylene. Edge strip ( 1 ) according to one of the preceding claims, characterized in that the melt layer ( 3 . 3 ' ) Light and / or radiation-absorbing additives, preferably contains laser pigments. Furniture ( 4 ) with an edge strip ( 1 ) according to one of the preceding claims, characterized in that the underside ( 50 ) the edge strip ( 1 ) over the entire surface with the edge ( 40 ) of the piece of furniture ( 4 ) is integrally connected.

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