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DE102011104980A1 - Edge strip made of a thermoplastic plastic material in a multilayer structure, useful preferably for furniture panels, comprises a highly flowable melt layer in a melt state, exhibiting a similar hardness and melting point of other layer - Google Patents

Edge strip made of a thermoplastic plastic material in a multilayer structure, useful preferably for furniture panels, comprises a highly flowable melt layer in a melt state, exhibiting a similar hardness and melting point of other layer Download PDF

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Publication number
DE102011104980A1
DE102011104980A1 DE102011104980A DE102011104980A DE102011104980A1 DE 102011104980 A1 DE102011104980 A1 DE 102011104980A1 DE 102011104980 A DE102011104980 A DE 102011104980A DE 102011104980 A DE102011104980 A DE 102011104980A DE 102011104980 A1 DE102011104980 A1 DE 102011104980A1
Authority
DE
Germany
Prior art keywords
edge strip
layer
melt
melt layer
strip according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE102011104980A
Other languages
German (de)
Inventor
Thomas Streichardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MKT MODERNE KUNSTSTOFF TECHNIK Gebr ESCHBACH GMBH
Mkt Moderne Kunststoff-Technik Gebr Eschbach GmbH
Original Assignee
MKT MODERNE KUNSTSTOFF TECHNIK Gebr ESCHBACH GMBH
Mkt Moderne Kunststoff-Technik Gebr Eschbach GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MKT MODERNE KUNSTSTOFF TECHNIK Gebr ESCHBACH GMBH, Mkt Moderne Kunststoff-Technik Gebr Eschbach GmbH filed Critical MKT MODERNE KUNSTSTOFF TECHNIK Gebr ESCHBACH GMBH
Priority to DE102011104980A priority Critical patent/DE102011104980A1/en
Publication of DE102011104980A1 publication Critical patent/DE102011104980A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/0017—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor characterised by the choice of the material
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B95/00—Fittings for furniture
    • A47B95/04—Keyplates; Ornaments or the like
    • A47B95/043—Protecting rims, buffers or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1477—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier
    • B29C65/1483—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier coated on the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B29C65/1683—Laser beams making use of an absorber or impact modifier coated on the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
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    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/748—Joining plastics material to non-plastics material to natural products or their composites, not provided for in groups B29C66/742 - B29C66/746
    • B29C66/7487—Wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B15/00—Layered products comprising a layer of metal
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    • B29C63/0026—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor an edge face with strip material, e.g. a panel edge
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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Composite Materials (AREA)
  • Chemical & Material Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)

Abstract

Edge strip made of a thermoplastic plastic material in a multilayer structure, preferably for furniture panels, comprises a highly flowable melt layer in a melt state, exhibiting a similar hardness and melting point of at least one other layer, such that a total of the edge strip exhibits a constant hardness and melting temperature, and comprises energy absorbing additives and/or pigments, preferably light and/or radiation and heat-absorbing additives, mineral fillers or metal particles of the melt layer and an other upper layer, for an optimum absorption of laser radiation. Edge strip made of a thermoplastic plastic material in a multilayer structure, preferably for furniture panels, comprises a highly flowable melt layer in a melt state, exhibiting a similar hardness and melting point of at least one other layer, such that a total of the edge strip exhibit a constant hardness and melting temperature, and comprises energy absorbing additives and/or pigments, preferably light and/or radiation and heat-absorbing additives, mineral fillers or metal particles of the melt layer and an other upper layer, for an optimum absorption of laser radiation and conversion of the laser radiation into thermal energy or absorption of supplied plasma energy.

Description

Die Erfindung betrifft eine Kantenleiste aus thermoplastischem Kunststoffmaterial gemäß Anspruch 1, welche mit der Rückseite auf Möbelplatten oder dergleichen klebstofffrei fixierbar ist, als Zusatz zur Patentanmeldung DE 10 2010 014 776.1 The invention relates to an edge strip made of thermoplastic material according to claim 1, which is fixable without adhesive on the back of furniture panels or the like, as an addition to the patent application DE 10 2010 014 776.1

Derartige Kantenleisten werden auch als Kanten, Kantenbänder oder Deckleisten bezeichnet. Bei den Platten handelt es sich vorzugsweise um Holzwerkstoffplatten, z. B. Spanplatten oder Faserplatten (u. a. MDF-Platten), die für Möbel eingesetzt werden.Such edge strips are also referred to as edges, edge bands or cover strips. The plates are preferably wood-based panels, z. Chipboard or fiberboard (including MDF boards) used for furniture.

Es ist bekannt, zur Fixierung von Kantenleisten an den Schmalseiten von Möbelplatten Schmelzklebstoffe unmittelbar in der so genannten Kantenanleimmaschine einzusetzen. Die Schmelzklebstoffe werden dabei auf die Kantenleiste und/oder auf die Möbelplatte aufgetragen. Dieses Verfahren besitzt den Nachteil, dass primär bedingt durch den Schmelzklebstoff eine sichtbare Fuge zwischen Kantenleiste und Möbelplatte entsteht, die im Gebrauch des Möbels verschmutzungs- und feuchtigkeitsempfindlich ist. Da der Auftrag des Schmelzklebstoffes durch Walzen, Rakeln oder mittels Düsenauftrag erfolgt, ist der Auftrag ungleichmäßig und birgt die Gefahr von fehlerhaften Verklebungen. Ferner ist dieses Verfahren durch das Aufschmelzen des Schmelzklebstoffes energieaufwendig.It is known to use for fixing edge strips on the narrow sides of furniture panels hot melt adhesives directly in the so-called edge banding machine. The hot melt adhesives are applied to the edge trim and / or on the furniture panel. This method has the disadvantage that primarily due to the hot melt adhesive, a visible joint between edge strip and furniture panel is created, which is sensitive to contamination and moisture in use of the furniture. Since the application of the hot melt adhesive by rolling, doctoring or by means of nozzle application, the order is uneven and carries the risk of incorrect bonding. Furthermore, this method is energy-consuming by the melting of the hot melt adhesive.

In der DE 10 2006 021 171 A1 bzw. EP1852242 B1 wird ein als Deckleiste bezeichnetes Kantenband beschrieben, welches zur Anbringung auf ein plattenförmiges Werkstück vorgesehen ist und aus einem extrudierbaren thermoplastischen Kunststoff besteht.In the DE 10 2006 021 171 A1 respectively. EP1852242 B1 is described as a cover strip edge band which is intended to be mounted on a plate-shaped workpiece and consists of an extrudable thermoplastic material.

Hierbei wird die Klebstoffschicht in Form eines Schmelzklebstoffes durch Coextrusion auf eine Kantenleiste aufgetragen. Die Befestigung der Kantenleiste an die Möbelplatte erfolgt durch Aufschmelzen oder Aktivieren der Schmelzklebstoffschicht durch Laserstrahlung unmittelbar im Zuge der Befestigung der Kantenleiste an die Möbelplatte in der Kantenanleimmaschine.Here, the adhesive layer is applied in the form of a hot melt adhesive by coextrusion on an edge strip. The attachment of the edge strip to the furniture panel takes place by melting or activating the hot melt adhesive layer by laser radiation directly in the course of attaching the edge strip to the furniture panel in the edgebander.

Aus der EP 1163864 B1 ist eine klebstofffreie Verbindung zwischen einer Kantenleiste, die aus Kunststoffschichten unterschiedlicher Härte besteht, und einer Möbelplatte bekannt. Die Oberfläche der Kunststoffkante wird durch Laserstrahlung in der Kantenanleimmaschine aufgeschmolzen, so dass eine Laserschweißverbindung der Kantenleiste mit der Möbelplatte erfolgt.From the EP 1163864 B1 is an adhesive-free connection between an edge strip, which consists of plastic layers of different hardness, and a furniture plate known. The surface of the plastic edge is melted by laser radiation in the edge banding machine, so that a laser welding connection of the edge strip takes place with the furniture panel.

Die DE 20 2007 011 911 U1 beschreibt ebenfalls eine thermoplastische Kantenleiste, die eine coextrudierte Schmelzschicht aufweist, welche mittels Laserstrahlung aufgeschmolzen und somit an Möbelplatten verbunden werden kann. Die Schmelzschicht weist dafür eine abweichende chemische Basis und einen geringeren Schmelzpunkt auf als die Strukturschicht bzw. Oberseite der Kantenleiste.The DE 20 2007 011 911 U1 also describes a thermoplastic edge strip which has a coextruded melt layer, which can be melted by means of laser radiation and thus connected to furniture panels. The melt layer has a different chemical basis and a lower melting point than the structural layer or upper side of the edge strip.

Alle zuvor genannten Verfahren besitzen in der Praxis den gravierenden Nachteil, dass solche Kantenleisten sowohl mit Schmelzklebstoffschichten als auch mit Schmelzschichten nach der Befestigung der Kantenleiste an eine Möbelplatte bei der nachfolgenden spanenden Bearbeitung der Kantenleiste durch, z. B. Fräsen ein inhomogenes Zerspanungsverhalten bedingt durch unterschiedliche Härten bzw. unterschiedliche Schmelzpunkte und/oder aufgrund stark abweichender Basis-Polymere in den Schichten der Kantenleiste aufweisen. Dadurch entstehen unterschiedliche Oberflächenstrukturen der Schichten, welche sichtbar sind und visuell negativ beurteilt werden. Dieser Nachteil fällt insbesondere bei den Eckverbindungen der Kantenleisten an einer Möbelplatte sowie bei nachträglichen Überlackierungen der bekanteten Möbelplatte ins Gewicht.All of the aforementioned methods have in practice the serious disadvantage that such edge strips both with hot melt adhesive layers and with layers of melt after attachment of the edge strip to a furniture plate in the subsequent machining of the edge strip by, for. B. milling have an inhomogeneous machining behavior due to different hardness or different melting points and / or due to strongly different base polymers in the layers of the edge strip. This results in different surface structures of the layers, which are visible and visually negatively assessed. This disadvantage is particularly important in the corner joints of the edge strips on a furniture panel and in subsequent repainting the edged furniture panel in the weight.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Kantenleiste aus thermoplastischem Kunststoff insbesondere für Möbelplatten zu schaffen, die sich durch ein homogenes Zerspanungsverhalten der gesamten Kantenleiste auszeichnet und die sich klebstofffrei und ohne optisch erkennbare Fuge an einer Möbelplatte befestigen lässt.The invention is therefore based on the object to provide an edge strip of thermoplastic material, in particular for furniture panels, which is characterized by a homogeneous Zerspanungsverhalten the entire edge strip and can be fastened without glue and without visually recognizable joint to a furniture panel.

Die Lösung der Aufgabe der Erfindung erfolgte durch eine Kantenleiste mit der Merkmalskombination gemäß Anspruch 1, wobei die Unteransprüche zweckmäßige Ausgestaltungen und Weiterbildungen umfassen.The object of the invention was achieved by an edge strip with the feature combination according to claim 1, wherein the dependent claims include expedient refinements and developments.

Die Erfindung stellt demnach eine Kantenleiste bereit, die als mehrschichtige, klebstofffreie Kantenleiste über eine im Schmelze-Zustand extrem leicht fließende Schmelzschicht verfügt, die eine vergleichbare Härte und Schmelztemperatur zu den anderen Schichten besitzt, so dass die gesamte Kantenleiste eine konstante Härte und Schmelztemperatur aufweist. Diese Schicht ist durch Energiezufuhr durch z. B. Laserstrahlung oder Plasma aufschmelzbar, so dass die Kantenleiste an Möbelplatten ohne Klebstoffzugabe befestigt werden kann. Die Schmelzschicht ist bei einer Ausgestaltung der Erfindung eingefärbt. Erfindungsgemäß ist für eine optimale Absorption von Laserstrahlung und Umwandlung der Laserstrahlung in Wärmeenergie bzw. Absorption von zugeführter Plasmaenergie vorgesehen, sowohl der Schmelzschicht als auch der oberen Schicht energieabsorbierende Zusatzstoffe und/oder Pigmente, vorzugsweise licht- und/oder strahlungs- sowie wärmeabsorbierende Zusatzstoffe, z. B. Füllstoffe oder Metallpartikel, zuzugeben.Accordingly, the invention provides an edge strip which, as a multilayer, adhesive-free edge strip, has a melt layer which flows extremely easily in the melt state and has a comparable hardness and melting temperature to the other layers, so that the entire edge strip has a constant hardness and melting temperature. This layer is energized by z. As laser radiation or plasma fusible, so that the edge strip can be attached to furniture panels without adhesive addition. The melt layer is dyed in one embodiment of the invention. According to the invention for optimum absorption of laser radiation and conversion of the laser radiation into heat energy or absorption of supplied plasma energy is provided, both the melt layer and the upper layer energy absorbing additives and / or pigments, preferably light and / or radiation and heat absorbing additives, eg , As fillers or metal particles, admit.

Bei der Verarbeitung von Kantenleisten bei Möbelteilen mit Radien wurde erkannt, dass die hohe Steifigkeit thermoplastischer Kantenmaterialien eher störend ist, und zwar durch relativ hohe Rückstellkräfte der Kante. Eine geschlossene Fuge zwischen Holzwerkstoffplatte und Kante kann daher nur in einem begrenzten Bereich gemäß Stand der Technik erreicht werden. When processing edgebandings on furniture parts with radii, it was recognized that the high rigidity of thermoplastic edge materials is rather annoying, due to the relatively high restoring forces of the edge. A closed joint between wood material board and edge can therefore be achieved only in a limited area according to the prior art.

Um die Steifigkeit der Kante im Verarbeitungsprozess gezielt zu reduzieren, werden auf der Oberschicht der Kantenleiste energieabsorbierende Zusatzstoffe beigegeben, die zu einer definierten Wärmeaufnahme und damit Temperaturerhöhung des thermoplastischen Oberschichtmaterials führen.In order to reduce the rigidity of the edge specifically in the processing process, energy-absorbing additives are added to the upper layer of the edge strip, which lead to a defined heat absorption and thus temperature increase of the thermoplastic upper layer material.

Mit Hilfe dieser ergänzenden Beigabe energieabsorbierender Materialien, was auch in Form einer Beschichtung erfolgen kann, wird die Steifigkeit der gesamten Kante im Verarbeitungsprozess insbesondere für die Verarbeitung in Radien verbessert und eine leichtere Verformung der Kantenleiste geschaffen.With the help of this additional addition of energy-absorbing materials, which can also take place in the form of a coating, the rigidity of the entire edge is improved in the processing process, especially for processing in radii and easier deformation of the edge strip created.

Die Kantenleiste besteht bei einem Ausführungsbeispiel aus eingefärbten, thermoplastischen Kunststoff.The edge strip consists in one embodiment of colored thermoplastic material.

Dabei handelt es sich vorzugsweise um Polymere und Coplymere des Styrols (z. B. PS oder ABS), der Polyolefine (z. B. PE oder PP), der Polycarboante, der Polyester (z. B. PET), ein Polymer auf Basis von Acrylaten (z. B. PMMA) oder des Vinylchlorids (z. B. PVC, VAC).These are preferably polymers and copolymers of styrene (eg PS or ABS), polyolefins (eg PE or PP), polycarboante, polyester (eg PET), a polymer based on of acrylates (eg PMMA) or vinyl chloride (eg PVC, VAC).

Die Dicke der Kantenleiste liegt vorzugsweise im Bereich von im wesentlichen 0,3 bis 4 mm. Die sichtbare Oberseite der eingefärbten Kantenleiste kann geprägt und/oder bedruckt und/oder lackiert und/oder mit einer Kunststoff- bzw. Metallfolie laminiert sein.The thickness of the edge strip is preferably in the range of substantially 0.3 to 4 mm. The visible upper side of the colored edge strip can be embossed and / or printed and / or lacquered and / or laminated with a plastic or metal foil.

Ferner sind so genannte Durchmaserungs-Effekte in den Schichten möglich. Durchmaserungseffekte werden bekannterweise durch Coextrusion des gleichen Polymers in andersfarbiger Einstellung oder durch eine inhomogene Farbmittelverteilung erzeugt. Die andersfarbige, streifige Verteilung optimiert die optische Reproduktion von Holzdekoren.Furthermore, so-called Durchmaserungs effects in the layers are possible. Defoaming effects are known to be produced by coextrusion of the same polymer in a different color setting or by an inhomogeneous colorant distribution. The different-colored, striped distribution optimizes the optical reproduction of wood decors.

Eine bevorzugte Ausführung der Erfindung betrifft eine eingefärbte, einschichtige Kantenleiste bestehend aus einem leicht fließendem Polymer insbesondere Homopolypropylen mit einem Schmelzflußindex oberhalb von 25 g/10 min, vorzugsweise oberhalb von 50 g/10 min (nach ISO 1133 ; 230°C; 2,16 kg).A preferred embodiment of the invention relates to a colored, single-layer edge strip consisting of a readily flowing polymer, in particular homopolypropylene having a melt flow index above 25 g / 10 min, preferably above 50 g / 10 min (according to ISO 1133 ; 230 ° C; 2.16 kg).

Eine weitere bevorzugte Ausführung der Erfindung betrifft eine zwei- oder mehrschichtige Kantenleiste, die durch Coextrusion gefertigt wird. Die Coextrusion der Schmelzschicht kann sowohl in einem Prozeß unmittelbar mit der Extrusion der anderen Schichten und/oder durch eine nachträgliche Post-Coextrusion erfolgen.A further preferred embodiment of the invention relates to a two-layer or multi-layer edge strip which is produced by coextrusion. The coextrusion of the melt layer can be done both in one process immediately with the extrusion of the other layers and / or by post-co-extrusion.

Vorteilhaft stellte sich auch eine Laminierung der Schmelzschicht in einem zweistufigen Prozeß dar. Im ersten Fertigungsschritt wird die Schmelzschicht als Folie extrudiert. Anschließend erfolgt die Laminierung dieser Folie auf die Rückseite der Kantenleiste. Der feste Verbund der Schichten bei dieser Laminierung wird durch Temperatur und Druck in einem Glättwerk erzeugt.A lamination of the melt layer in a two-stage process was also advantageous. In the first production step, the melt layer is extruded as a film. Subsequently, the lamination of this film takes place on the back of the edge strip. The tight bond of the layers in this lamination is produced by temperature and pressure in a calender.

Ferner kann die Schmelzschicht durch eine flüssige Beschichtung, die durch Vernetzung oder Trocknung fest wird, erzeugt werden. Eine solche zwei- oder mehrschichtige Ausführung besitzt den Vorteil, dass die Schmelzschicht, die Zwischenschichten und die Oberschicht getrennt nach ihren Funktionen formuliert werden können. Die Zwischenschichten können als Haftungsvermittler zwischen unverträglichen, durch Coextrusion nicht kombinierbaren Polymeren (z. B. zwischen ABS und PP) fungieren.Further, the melt layer can be produced by a liquid coating which solidifies by crosslinking or drying. Such a two- or multi-layered embodiment has the advantage that the melt layer, the intermediate layers and the top layer can be formulated separately according to their functions. The intermediate layers can act as adhesion promoters between incompatible coextrusion-incompatible polymers (eg between ABS and PP).

Die Erfindung schlägt bevorzugt eine zweischichtige Kantenleiste vor, bestehend aus einer Oberschicht der o. g. Polymeren insbesondere Homopolypropylen sowie einer coextrudierten Schmelzschicht, die auf einem leicht fließenden Polymer gleicher chemischer Basis insbesondere Homopolypropylen mit einem Schmelzflußindex (MFI) oberhalb von 25 g/10 min, vorzugsweise oberhalb von 50 g/min (nach ISO 1133 , 230°C, 2,16 kg) basiert.The invention preferably proposes a two-layer edge strip consisting of an upper layer of the above-mentioned polymers, in particular homopolypropylene, and a coextruded melt layer which comprises homopolypropylene having a melt flow index (MFI) above 25 g / 10 min, preferably above, on a readily flowing polymer of the same chemical basis of 50 g / min (after ISO 1133 , 230 ° C, 2.16 kg).

Durch die Verwendung der gleichen Polymerbasis in der Oberschicht und in der Schmelzschicht ist das Zerspanungsverhalten, die Härte und die Erweichungstemperatur der gesamten Kantenleiste sehr homogen, so dass visuell keine Unterschiede in Farbe, Glanz und/oder Struktur im Ergebnis der spanenden Bearbeitung der Kantenleiste nach der Befestigung an der Möbelplatte erkennbar sind.By using the same polymer base in the top layer and in the melt layer, the chipping behavior, hardness and softening temperature of the entire edge strip are very homogeneous, so that visually there are no differences in color, gloss and / or texture as a result of machining the edge strip after Attachment to the furniture panel are recognizable.

Die Verwendung von leicht fließenden Polymeren für die Schmelzschicht besitzt den Vorteil, dass das Polymer der Schmelzschicht im Schmelzezustand in das offenporige Gefüge der Möbelplatte fließt und sich darin mechanisch gut verankern kann. Somit werden hohe Verklebungsqualitäten erzielt. Ferner entsteht eine geschlossene Fuge zwischen Kantenleiste und Möbelplatte, so dass eine hohe Beständigkeit gegen Feuchtigkeit und damit gegen Quellungen der Möbelplatte durch Wasseraufnahme sowie Anhaftung von Schmutz erzielt wird.The use of easily flowing polymers for the melt layer has the advantage that the polymer of the melt layer in the melt state flows into the open-pore structure of the furniture panel and can be mechanically well anchored therein. Thus, high bonding qualities are achieved. Furthermore, a closed gap between edge strip and furniture panel, so that a high resistance to moisture and thus against swelling of the furniture panel is achieved by water absorption and adhesion of dirt.

Für eine optimale Absorption der Laserstrahlung und Umwandlung der Laserstrahlung in Wärmeenergie bzw. Absorption der Plasmaenergie können Energie absorbierende Zusatzstoffe, vorzugsweise Licht und/oder Strahlung sowie Wärme absorbierende Zusatzstoffe z. B. Laserpigmente, mineralische Füllstoffe oder Metallpartikell eingesetzt werden. Dieses hat den Vorteil, dass die Energieabsorption und damit das Aufschmelzverhalten der Schmelzschicht gezielt auf die Energiequelle z. B. Wellenlänge der Laserstrahlung abgestimmt werden kann. For optimal absorption of the laser radiation and conversion of the laser radiation into heat energy or absorption of the plasma energy, energy-absorbing additives, preferably light and / or radiation and heat-absorbing additives z. As laser pigments, mineral fillers or metal particles are used. This has the advantage that the energy absorption and thus the melting behavior of the melt layer targeted to the energy source z. B. wavelength of the laser radiation can be tuned.

Eine weitere Ausführung betrifft eine Kantenleiste nach einer der vorgenannten Ausführungen, wobei auf die Schmelzschicht und die Oberschicht der Kantenleiste eine flüssige Beschichtung aufgetragen wird, die Energie absorbierenden Zusatzstoffe enthält und thermisch und/oder chemisch getrocknet bzw. vernetzt wird. Die flüssige Beschichtung kann dafür sowohl vollflächig als auch nur in Teilflächen oder Bereichen auf die Schmelzschicht erfolgen. Damit können gezielt, räumlich definierte Bereiche der Schmelzschicht mit der Energiequelle bei der Verarbeitung aufgeschmolzen werden, so dass der Verbund zwischen Kantenleiste und Möbelplatte ebenfalls positionsgenau definierbar ist.A further embodiment relates to an edge strip according to one of the aforementioned embodiments, wherein a liquid coating is applied to the melt layer and the top layer of the edge strip, which contains energy-absorbing additives and is thermally and / or chemically dried or crosslinked. For this purpose, the liquid coating can take place both over the entire surface and only in partial areas or areas on the melt layer. In this way, targeted, spatially defined areas of the melt layer can be melted with the energy source during processing, so that the bond between the edge strip and the furniture panel can also be precisely defined.

Zur besseren Anbindung der Additive und insbesondere von mineralischen Füllstoffen an die Polymerbasis und zur gleichzeitigen Steigerung der Haftungskräfte der Kantenleiste an Holzwerkstoffen kann die Schmelzschicht bekannterweise mit Additiven mit funktionalen Gruppen wie z. B. Maleinsäureanhydrid oder auf Bass von Isocyanat versetzt werden.For better connection of the additives and in particular of mineral fillers to the polymer base and for the simultaneous increase of the adhesion forces of the edge strip on wood materials, the melt layer can be known with additives having functional groups such. As maleic anhydride or bass are added by isocyanate.

Eine weitere bevorzugte Ausführung der Erfindung betrifft eine Kantenleiste nach einer der vorgenannten Ausführungen, wobei die Schmelzschicht mit einem Haftvermittler beschichtet ist.A further preferred embodiment of the invention relates to an edge strip according to one of the aforementioned embodiments, wherein the melt layer is coated with a bonding agent.

Unter einem Haftvermittler wird ein flüssiges Stoffgemisch verstanden, dass die Hauptkomponenten Wasser und/oder organischen Lösungsmitteln, Bindemittel (z. B. EVA, PUR, PVC) sowie mineralische Füllstoffe (z. B. Kieselsäure) enthält. Zur Steigerung der Haftungs-Eigenschaften können zusätzlich Vernetzer (z. B. Isocyanate) zugegeben werden.An adhesion promoter is understood as meaning a liquid substance mixture that contains the main components of water and / or organic solvents, binders (eg EVA, PUR, PVC) as well as mineral fillers (eg silica). In order to increase the adhesion properties, it is additionally possible to add crosslinkers (for example isocyanates).

Nach der thermischen Trocknung zeichnet sich diese Haftvermittlerschicht durch eine gute Verklebbarkeit der beschichteten Kantenleiste mit bekannten, herkömmlichen Schmelzklebstoffen nach den bekannten, eingangs beschriebenen Verfahren aus.After the thermal drying, this primer layer is characterized by a good bondability of the coated edge strip with known, conventional hot melt adhesives according to the known, initially described method.

Überraschenderweise stellte sich heraus, dass eine solche Haftvermtttlerschicht keine signifikanten oder negativen Einflüsse auf das Fügeverhalten der Schmelzschicht durch Aufschmelzen mittels Energiezufuhr ausübt. Somit ergibt sich der Vorteil, dass der Verarbeiter der Kantenleiste diese sowohl herkömmlich mittels Schmelzklebstoffen als auch mittels Energiezufuhr durch Laserstrahlung oder Plasma an Möbelplatten befestigen kann. Hierdurch entfällt für den Verarbeiter die Notwendigkeit einer doppelten Lagerhaltung an Kantenleisten für beide Verfahren.Surprisingly, it has been found that such a Haftvermtttlerschicht exerts no significant or negative effects on the joining behavior of the melt layer by melting by means of energy. Thus, there is the advantage that the processor of the edge strip can fix them both conventionally by means of hot melt adhesives as well as energy supply by laser radiation or plasma furniture panels. This eliminates the need for a double storage of edge strips for both processes for the processor.

Eine weitere bevorzugte Ausführung der Erfindung betrefft eine Kantenleiste nach einer der vorgenannten Ausführungen, wobei die Schmelzschicht und/oder die Zwischenschichten eine Schaumstruktur aufweist. Die Schaumstruktur kann sowohl durch physikalisches als auch durch chemisches Schäumen der polymeren Schicht erzeugt werden. Es zeigte sich, dass die Energieaufnahme der Schmelzschicht (z. B. nach Laserstrahlung) erhöht wird. Dadurch kann bei gleicher Verklebungsgüte die Energieleistung (z. B. des Lasers) reduziert und/oder die Vorschubgeschwindigkeit des Fügeprozesses erhöht und/oder die Konzentration der Energie absorbierenden Additive reduziert werden. Alle vorgenannten Maßnahmen führen zu einer Kostensenkung.A further preferred embodiment of the invention relates to an edge strip according to one of the aforementioned embodiments, wherein the melt layer and / or the intermediate layers has a foam structure. The foam structure can be produced by both physical and chemical foaming of the polymeric layer. It was found that the energy absorption of the melt layer (eg after laser radiation) is increased. As a result, the energy performance (for example of the laser) can be reduced and / or the feed rate of the joining process can be increased and / or the concentration of the energy-absorbing additives can be reduced while maintaining the same bond quality. All the above measures lead to a reduction in costs.

ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.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.

Zitierte PatentliteraturCited patent literature

  • DE 102010014776 [0001] DE 102010014776 [0001]
  • DE 102006021171 A1 [0004] DE 102006021171 A1 [0004]
  • EP 1852242 B1 [0004] EP 1852242 B1 [0004]
  • EP 1163864 B1 [0006] EP 1163864 B1 [0006]
  • DE 202007011911 U1 [0007] DE 202007011911 U1 [0007]

Zitierte Nicht-PatentliteraturCited non-patent literature

  • ISO 1133 [0019] ISO 1133 [0019]
  • ISO 1133 [0023] ISO 1133 [0023]

Claims (12)

Kantenleiste aus thermoplastischem Kunststoffmaterial in mehrschichtiger Struktur, insbesondere für Möbelplatten, wobei diese über eine im Schmelzzustand hoch fließfähige Schmelzschicht verfügt, die eine vergleichbare Härte und Schmelztemperatur zu mindestens einer weiteren Schicht besitzt, so dass insgesamt die Kantenleiste eine konstante Härte und Schmelztemperatur aufweist, dadurch gekennzeichnet, dass für eine optimale Absorption von Laserstrahlung und Umwandlung der Laserstrahlung in Wärmeenergie bzw. Absorption von zugeführter Plasmaenergie Energie absorbierende Zusatzstoffe und/oder Pigmente, vorzugsweise Licht und/oder Strahlung sowie Wärme absorbierende Zusatzstoffe, mineralische Füllstoffe oder Metallpartikel der Schmelzschicht und der weiteren, oberen Schicht zugesetzt werden.Edge strip made of thermoplastic material in a multi-layered structure, especially for furniture panels, this has a highly flowable in the melt state melt layer having a comparable hardness and melting temperature to at least one other layer, so that in total the edge strip has a constant hardness and melting temperature, characterized in that, for optimum absorption of laser radiation and conversion of the laser radiation into heat energy or absorption of supplied plasma energy, energy-absorbing additives and / or pigments, preferably light and / or radiation and heat-absorbing additives, mineral fillers or metal particles of the melt layer and the further, upper Layer can be added. Kantenleiste nach Anspruch 1, dadurch gekennzeichnet, dass diese aus einem ein- oder durchgefärbten thermoplastischem Kunststoffmaterial, insbesondere umfassend Polymere und Coplymere des Styrols, der Polyolefine, der Polycarbonate, der Polyester, ein Polymer auf Basis von Acrylaten oder des Vinylchlorids besteht.Edge strip according to claim 1, characterized in that it consists of a single- or by-colored thermoplastic material, in particular comprising polymers and Coplymere of styrene, polyolefins, polycarbonates, the polyester, a polymer based on acrylates or vinyl chloride. Kantenleiste nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Dicke der Kantenleiste vorzugsweise im Bereich von im wesentlichen 0,3 bis 4 mm liegt und die sichtbare Oberseite geprägt und/oder bedruckt und/oder lackiert und/oder mit einer Kunststoff- bzw. Metallfolie laminiert ist.Edge strip according to claim 1 or 2, characterized in that the thickness of the edge strip is preferably in the range of substantially 0.3 to 4 mm and the visible upper side embossed and / or printed and / or painted and / or with a plastic or Metal foil is laminated. Kantenleiste nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass diese Durchmaserungen, erhalten durch Coextrusion des gleichen Polymers in andersfarbiger Einstellung oder durch eine inhomogene Farbmittelverteilung, aufweist.Edge strip according to one of the preceding claims, characterized in that said grains, obtained by coextrusion of the same polymer in a different color setting or by an inhomogeneous colorant distribution having. Kantenleiste nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass diese zwei- oder mehrschichtig durch Coextrusion gefertigt ist, wobei die Coextrusion der Schmelzschicht sowohl in einem Prozeß unmittelbar mit der Extrusion der anderen Schichten und/oder durch eine nachträgliche Post-Coextrusion und/oder durch eine Laminierung der Schmelzschicht als Folie auf die anderen Schichten erfolgt.Edge strip according to one of the preceding claims, characterized in that it is made of two or more layers by coextrusion, the coextrusion of the melt layer both in a process directly with the extrusion of the other layers and / or by a post-coextrusion and / or by a lamination of the melt layer is carried out as a film on the other layers. Kantenleiste nach einem der vorangegangenen Ansprüche dadurch gekennzeichnet, dass diese zwei- oder mehrschichtig durch eine flüssige Beschichtung, die durch Vernetzung oder Trocknung fest wird, realisiert ist.Edge strip according to one of the preceding claims, characterized in that it is realized in two or more layers by a liquid coating, which is solidified by crosslinking or drying. Kantenleiste nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass bei einer mehrschichtigen Ausführung mindestens eine Zwischenschicht vorgesehen ist, welche als Haftvermittler zwischen unverträglichen, durch Coextrusion nicht kombinierbaren Polymeren fungiert.Edge strip according to one of the preceding claims, characterized in that in a multilayer embodiment at least one intermediate layer is provided, which acts as a bonding agent between incompatible, not combinable by coextrusion polymers. Kantenleiste nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Oberschicht aus Polymeren, insbesondere Homopolypropylen sowie einer coextrudierten Schmelzschicht besteht, die auf einem leicht fließenden Polymer gleicher chemischer Basis, insbesondere Homopolypropylen mit einem Schmelzflußindex (MFI) oberhalb von 25 g/10 min, vorzugsweise oberhalb von 50 g/min (nach ISO 1133, 230°C, 2,16 kg) basiert.An edge strip according to one of the preceding claims, characterized in that the top layer consists of polymers, in particular homopolypropylene and a coextruded melt layer, which is based on a readily flowing polymer of the same chemical base, in particular homopolypropylene having a melt flow index (MFI) above 25 g / 10 min, preferably above 50 g / min (according to ISO 1133, 230 ° C, 2.16 kg). Kantenleiste nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass durch die Verwendung der gleichen Polymerbasis in der Oberschicht und in der Schmelzschicht das spätere Zerspanungsverhalten, die Härte und die Erweichungstemperatur der gesamten Kantenleiste homogen einstellbar ist, wodurch visuelle Unterschiede in Farbe, Glanz und/oder Struktur im Ergebnis der spanenden Bearbeitung der Kantenleiste nach der Befestigung an der Möbelplatte vermeidbar sind.Edging strip according to one of the preceding claims, characterized in that by the use of the same polymer base in the top layer and in the melt layer, the subsequent chipping behavior, hardness and softening temperature of the entire edge strip is homogeneously adjustable, whereby visual differences in color, gloss and / or Structure as a result of machining the edge strip after attachment to the furniture plate are avoidable. Kantenleiste nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass auf die Schmelzschicht und die Oberschicht der Kantenleiste eine flüssige Beschichtung aufgetragen wird, die Energie absorbierenden Zusatzstoffe und/oder Pigmente, vorzugsweise Licht und/oder Strahlung sowie Wärme absorbierende Zusatzstoffe, mineralische Füllstoffe oder Metallpartikell enthält und thermisch und/oder chemisch getrocknet bzw. vernetzt ist.Edge strip according to one of the preceding claims, characterized in that on the melt layer and the top layer of the edge strip, a liquid coating is applied, the energy absorbing additives and / or pigments, preferably light and / or radiation and heat-absorbing additives, mineral fillers or metal particles and is thermally and / or chemically dried or crosslinked. Kantenleiste nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Schmelzschicht mit einem Haftvermittler versehen ist, welcher aus einem flüssigen Stoffgemisch besteht, dass die Hauptkomponenten Wasser und/oder organischen Lösungsmittel, Bindemittel sowie mineralische Füllstoffe enthält.Edge strip according to one of the preceding claims, characterized in that the melt layer is provided with an adhesion promoter, which consists of a liquid mixture that contains the main components of water and / or organic solvents, binders and mineral fillers. Kantenleiste nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Schmelzschicht und/oder die Zwischenschichten eine Schaumstruktur aufweist.Edge strip according to one of the preceding claims, characterized in that the melt layer and / or the intermediate layers has a foam structure.
DE102011104980A 2011-06-20 2011-06-20 Edge strip made of a thermoplastic plastic material in a multilayer structure, useful preferably for furniture panels, comprises a highly flowable melt layer in a melt state, exhibiting a similar hardness and melting point of other layer Withdrawn DE102011104980A1 (en)

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US20220161868A1 (en) * 2020-11-25 2022-05-26 Webasto SE Vehicle Roof Comprising a Painted Rigid Roof Module

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