DE102015121550A1 - Edging strip for furniture - Google Patents

Abstract

The invention relates to an edge strip (1) for furniture, comprising a melt layer (3) and a structural layer (2) connected to the melt layer (3), both of which at least partially comprise a polymeric material, the melt layer (3) containing additives which characterized in that the melt layer (3) contains at least one additive containing at least partly inorganic and / or organic pigments in an amount of about 0.01 to 15% by weight, preferably 0.02 to 10% by weight, based on your total weight.

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, wherein the melt layer contains additives.

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 a 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. The use of these plastic edges from the known prior art leads disadvantageously to the fact that the gap between the plastic edge and the front side of the furniture panel due to the residual stresses of the plastic edge opens minimally.

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 process reliable on furniture attachable and in which no gap between the edge strip and the front of the piece of furniture is visible.

This is realized by an edge strip with the features of claim 1 and a piece of furniture with the features of claim 12 according to the invention. Further advantageous embodiments are described in the subclaims.

It has surprisingly been found that a trim strip for furniture comprising a melt layer and a structural layer associated with the melt layer, both at least partially comprising a polymeric material, wherein the melt layer contains additives, is characterized in that the melt layer at least one, at least partially inorganic and / or organic pigments containing additive in an amount of about 0.01 to 15 wt .-%, preferably 0.02 to 10 wt .-%, based on their total weight, having. Surprisingly, by the additive in particular the rigidity of the material of the melt layer be decisively improved. Another advantage of the edge strip according to the invention is that the reflection or scattering of the energy to be introduced into the melt layer, for example of a laser, is optimized or increased by the amount, type and geometry of the additive. The introduced in the melt layer of the edge strip according to the invention additive can optimize or improve the thermal conductivity of the melt layer depending on the amount added, according to its particle size, according to its geometry.

It has been found to be advantageous in the edge strip according to the invention that the additive of the melt layer is selected from the group of metal oxides and the metal salts of inorganic anions of the 3rd to 7th main group.

In a further advantageous embodiment of the edge strip according to the invention, the additive of the melt layer is selected from the group of metal salts of inorganic, oxygen-containing anions of the 3rd to 7th main group, preferably the 4th to 6th main group. By this selection of various additives for the melt layer of the edge strip according to the invention, this can on the one hand be cost-effective and economical to produce and at any time be reliably attached to the narrow sides of furniture.

In a further likewise advantageous embodiment of the edge strip according to the invention, the additive of the melt layer is selected from the group of metal salts of organic anions such as acetates, butyrates, citrates, formates, fumarates, glutarates, lactates, malates, malonates, oxalates, stearates, tartrates.

It has also been found to be advantageous in the edge strip according to the invention that the additive of the melt layer is selected in particular from silicates, carbonates, phosphates, sulfates, sulfides and the like. In a particularly advantageous embodiment of the edge strip according to the invention, the additive of the melt layer comprises in particular barium sulfate, calcium sulfate, calcium carbonate. By the possibility of the additive of the melt layer in different amounts and by its chemical structure, in particular the stiffness of the edge strip according to the invention can be positively influenced and the edge strip according to the invention can be structured by its recipe that at an energy input by an energy source, selected from the group from laser, infrared source, ultrasound source, magnetic field source, microwave source, plasma source and fumigation, this energy is absorbed or absorbed so that the melt layer melted and the edge strip according to the invention is integrally attached to the narrow side of the furniture.

Another advantage of the edge strip according to the invention is seen in the fact that the additive of the melt layer is particulate and / or spherulitic and / or fibrous and / or platelet-shaped and / or rod-shaped. By these different geometries, an edge strip according to the invention can be provided, which has a high inherent rigidity and whose melt layer has an increased absorption capacity for introduced energy from energy sources and wherein the introduced energy is continuously and optimally distributed in the melt layer.

In a further likewise advantageous embodiment of the edge strip according to the invention, the additive of the melt layer has an average particle size (D 50) of less than 50 μm, preferably less than 15 μm, preferably less than 10 μm. As a result, an optimal distribution within the melt layer of the edge strip according to the invention is advantageously possible.

In a preferred embodiment of the edge strip according to the invention, the material of 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 on polyvinyl chloride (PVC); Polyolefin, such as polypropylene (PP) or polyethylene (PE); a styrene-based polymer such as polystyrene (PS) or styrene-butadiene predominantly styrene (SB) copolymer 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) as well as mixtures of at least two of these materials is based. In this case, the polymer material of the structural layer may be admixed with suitable fillers and / or reinforcing substances which positively influence the mechanical properties, in particular glass fibers, glass spheres, 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.

An extremely advantageous embodiment of 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.

The edge strip according to the invention is characterized in particular by the fact that the material of the melt layer is a copolymer, preferably a graft copolymer, preferably a maleic anhydride grafted polyolefin. Particularly advantageously, 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.

Also advantageous in the edge strip according to the invention is that the melt layer has a thickness of about 0.1 to 1.5 mm, preferably 0.2 to 0.5 mm. These dimensions lead to an economical and cost-effective production of the edge strip according to the invention.

The invention further relates to a piece of furniture with an edge strip with the features described above, this being characterized in that the underside of the edge strip over its entire surface is integrally connected to it edge of the piece of furniture.

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

Show it:

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

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

The edge strip according to the invention 1 for furniture 4 includes a melt layer 3 and a structural layer 2 ,

The melt layer 3 has in this embodiment, both polar and non-polar parts in the molecular structure, ie, the material of the melt layer 3 is chemically modified to contain both polar and nonpolar portions in the molecular structure.

Between the structural layer 2 and the melt layer 3 no, one or more intermediate layers may be provided, so that the structural layer 2 and the melt layer 3 at least indirectly, preferably directly connected to each other.

As a structural layer 2 the edge strip 1 For the purposes of the invention, a layer is referred to as the edge strip 1 essentially their structure or their geometry and their design gives. The material of the structural layer 2 can be selected from any materials such as polymeric materials. In this embodiment, the structural layer is 2 made of a polyolefin, particularly preferably made of a polypropylene.

The melt layer 3 has in this embodiment at least one, at least partially inorganic and / or organic pigments containing additive in an amount of about 0.01 to 15 wt .-%, preferably 0.02 to 10 wt .-%, based on their total weight on , In this embodiment, the additive is a barium sulfate [BaSO ₄ ] in an amount of about 5% by weight, based on its total weight.

The material of the melt layer 3 is chemically modified in this embodiment to the effect that it has both polar and nonpolar portions in the molecular structure, preferably, the material of the melt layer 3 a maleic anhydride grafted polypropylene. The material of the melt layer 3 contains in this embodiment, a proportion of up to 4% polar and / or reactive groups in the molecular structure, preferably between 0.5 and 2%.

The melt layer 3 is melted by applying energy from an energy source and then the edge strip 1 not shown pressing elements on the structural layer 2 directly to the front side 40 of the furniture 4 Pressed and fixed.

In the 2 is a perspective sectional view of a piece of furniture 4 with the edge strip according to the invention 1 shown, wherein the melt layer 3 the edge strip 1 cohesively with the front side 40 of the furniture 4 connected is.

The material of the melt layer 3 has in this embodiment at least one, at least partially inorganic and / or organic pigments containing additive in an amount of about 0.01 to 15 wt .-%, preferably 0.02 to 10 wt .-%, based on their total weight on ,

In this embodiment, the melt layer 3 the edge strip 1 further energy absorbing additives, preferably light and / or radiation absorbing additives in an amount of about 2.5 wt .-%, based on their total weight.

The material of the melt layer 3 is in this embodiment, a non-reactive hot melt adhesive based on ethylene vinyl acetates (EVA), while the material of the structural layer 2 consists of the material acrylonitrile-butadiene-styrene copolymer (ABS).

By applying energy from an energy source selected from the group consisting of laser, infrared source, ultrasound source, magnetic field source, microwave source, plasma source and fumigation source, that in the melt layer 3 contained energy absorbing additive which receive energy supplied by the energy source and the melt layer 3 heat above the melting point.

By during the joining operation of the edge strip according to the invention 1 in the melt layer 3 absorbed energy of the energy source provides the additive contained there by the absorption and / or reflection of energy for a more optimal distribution of energy in the melt layer 3 , In this embodiment, the additive is the melt layer 3 a calcium sulfate in an amount of about 5% by weight, based on its total weight.

The edge strip according to the invention 1 but also characterized by the fact that the additive of the melt layer 3 has an average particle size (D 50) of less than 50 μm, preferably less than 15 μm, preferably less than 10 μm. As a result, both a cost-effective and economical production of the edge strip according to the invention 1 possible, while continuing to use the edge strip according to the invention as intended 1 by introducing energy from an energy source onto the melt layer 3 their effect is optimized.

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 (12)

Edge strip ( 1 ) for furniture comprising a layer of enamel ( 3 ) and one with the melt layer ( 3 ) associated structural layer ( 2 ), both of which at least partially comprise a polymeric material, wherein the melt layer ( 3 ) Contains additives, characterized in that the melt layer ( 3 ) at least one, at least partially inorganic and / or organic pigments containing additive in an amount of about 0.01 to 15 wt .-%, preferably 0.02 to 10 wt .-%, based on their total weight having. Edge strip ( 1 ) according to claim 1, characterized in that the additive of the melt layer ( 3 ) is selected from the group of metal oxides and the metal salts of inorganic anions of the 3rd to 7th main group. Edge strip ( 1 ) according to one of the preceding claims, characterized in that the additive of the melt layer ( 3 ) is selected from the group of metal salts of inorganic, oxygen-containing anions of the 3rd to 7th main group, preferably the 4th to 6th main group. Edge strip ( 1 ) according to one of the preceding claims, characterized in that the additive of the melt layer ( 3 ) is selected in particular from silicates, carbonates, phosphates, sulfates, sulfides and the like. Edge strip ( 1 ) according to one of the preceding claims, characterized in that the additive of the melt layer ( 3 ) Barium sulfate, calcium sulfate, calcium carbonate. Edge strip ( 1 ) according to one of the preceding claims, characterized in that the additive of the melt layer ( 3 ) is particulate and / or spherulitic and / or fibrous and / or platelet-shaped and / or rod-shaped. Edge strip ( 1 ) according to one of the preceding claims, characterized in that the additive of the melt layer ( 3 ) has an average particle size (D50) of less than 50 μm, preferably less than 15 μm, preferably less than 10 μm. Edge strip ( 1 ) According to one of the preceding claims, characterized in that the material of the enamel layer ( 3 ) 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 between the structural layer ( 2 ) and the melt layer ( 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 melt 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 ) has a thickness of 0.1 to 1.5 mm, preferably 0.2 to 0.5 mm. Furniture ( 4 ) with an edge strip ( 1 ) according to one of the preceding claims, characterized in that the underside ( 30 ) the edge strip ( 1 ) over the entire surface with the edge ( 40 ) of the piece of furniture ( 4 ) is integrally connected.

Images