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DE4102115A1 - Sheets which utilise domestic scrap - have two e.g. wood FRP or metal skins bonded to core made of two mutually incompatible thermoplastics mixed with non-thermoplastic particles - Google Patents

Sheets which utilise domestic scrap - have two e.g. wood FRP or metal skins bonded to core made of two mutually incompatible thermoplastics mixed with non-thermoplastic particles

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Publication number
DE4102115A1
DE4102115A1 DE19914102115 DE4102115A DE4102115A1 DE 4102115 A1 DE4102115 A1 DE 4102115A1 DE 19914102115 DE19914102115 DE 19914102115 DE 4102115 A DE4102115 A DE 4102115A DE 4102115 A1 DE4102115 A1 DE 4102115A1
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DE
Germany
Prior art keywords
layer
thermoplastic particles
plate according
thermoplastic
layer plate
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.)
Granted
Application number
DE19914102115
Other languages
German (de)
Other versions
DE4102115C2 (en
Inventor
Rolf Dipl Ing Schnause
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.)
SCHNAUSE, ROLF, DIPL.-ING., 24105 KIEL, DE
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Individual
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Filing date
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Priority to DE19914102115 priority Critical patent/DE4102115C2/en
Publication of DE4102115A1 publication Critical patent/DE4102115A1/en
Application granted granted Critical
Publication of DE4102115C2 publication Critical patent/DE4102115C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • B29B17/0042Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/04Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/082Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising vinyl resins; comprising acrylic resins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/04Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/18Layered products comprising a layer of metal comprising iron or steel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/20Layered products comprising a layer of metal comprising aluminium or copper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B19/00Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
    • B32B19/04Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica next to another layer of the same or of a different material
    • B32B19/045Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/08Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/30Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/30Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/16Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00Layers arrangement
    • B32B2250/033 layers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/10Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102Insulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/30Properties of the layers or laminate having particular thermal properties
    • B32B2307/306Resistant to heat
    • B32B2307/3065Flame resistant or retardant, fire resistant or retardant
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00Metals, their alloys or their compounds
    • B32B2311/24Aluminium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00Metals, their alloys or their compounds
    • B32B2311/30Iron, e.g. steel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00Animal or vegetable based
    • B32B2317/12Paper, e.g. cardboard
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00Animal or vegetable based
    • B32B2317/16Wood, e.g. woodboard, fibreboard, woodchips
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00Polyalkenes
    • B32B2323/04Polyethylene
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00Polyalkenes
    • B32B2323/10Polypropylene
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2325/00Polymers of vinyl-aromatic compounds, e.g. polystyrene
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2327/00Polyvinylhalogenides
    • B32B2327/06PVC, i.e. polyvinylchloride
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/62Plastics recycling; Rubber recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

A sandwich construction sheet of unlimited length consists of a core and two skins; the core is made up of thermoplastic polymers which are incompatible with each other in which small non-thermoplastic particles are distributed fairly uniformly; the two skins are high modulus material. Pref. thermoplastics for the core are polyethylene, polystyrene, polypropylene and PVC, at least two of these being present; pref. non-thermoplastic particles are paper, sawdust or similar, expanded mica or aluminium foil; pref. skin materials are laminates, aluminium or steel, wood or FRP. The three layers are pref. bonded together with urea type resin, or adhesive film of mixed ethylene polymer. Flame retardants can be incorporated. The laminar prods. can use thermosetting scrap. They are quite rigid in thickness of 1.5-10mm. Their water absorption is less than 1%, they can be surface-coated, embossed or printed. The figure shows the cross-section of the construction, with the outer skins (1) and the thermoplastic particles (4,5) in the core mix. The core also contains the non-thermoplastic particles (6); they can amount to e.g. 40 wt.% aluminium foil to make a sound-absorbing prod. ADVANTAGE - The prods. utilise the types of thermoplastic scrap arising in domestic waste materials.

Description

Die Erfindung betrifft eine vom Verfahren her in der Länge nicht beschränkte Dreischichtplatte, bestehend aus einer Mittellage und beiderseitigen dehnsteifen Deckschichten, wobei die Mittellage aus miteinander unverträglichen Thermoplasten besteht, denen kleinteilige, bevorzugt flächige, nicht-thermoplastische Teilchen ungefähr gleichmäßig verteilt, zugefügt sind.The invention relates to a method which is not limited in length by the method Three-layer board, consisting of a middle layer and double-sided elastic Cover layers, the middle layer of mutually incompatible thermoplastics consists of small, preferably flat, non-thermoplastic particles are distributed approximately evenly.

Bekanntgeworden ist eine Dreischichtplatte mit Alu-Deckschichten, deren Mittel­ lage aus reinem Polyethylen besteht. Es ist ferner bekannt, daß Kunststoff- Formkörper aus Mischungen unterschiedlicher Thermoplaste keinen praktischen Gebrauchswert haben, da die Festigkeitseigenschaften solcher Mischungen nur sehr gering sind. Bislang ist es nicht möglich, gebrauchstüchtige Gegenstände, geschweige denn Platten, aus unterschiedlichen Thermoplasten wie Mischungen aus Polyethylen, Polystyrol, Polypropylen und Polyvinylchlorid herzustellen.A three-layer panel with aluminum cover layers, their means, has become known layer consists of pure polyethylene. It is also known that plastic Moldings made from mixtures of different thermoplastics are not practical Have utility value, since the strength properties of such mixtures only are very low. So far it is not possible to use usable objects, let alone plates made of different thermoplastics such as mixtures from polyethylene, polystyrene, polypropylene and polyvinyl chloride.

Im Zuge des dualen Abfall-Sammelsystems werden jedoch aus den Haushalten in er­ heblichem Umfang die oben erwähnten Thermoplaste anfallen. Dabei wird eine Sor­ tierung in sortenreine Thermoplastabfälle nicht möglich sein. Außerdem werden Verbundkunststoffe anfallen, Verbunde aus Polyethylen, Papier und Alu-Folie. Eine Trennung nach diesem Sammelsystem ist nur für die Gruppen Metall, Glas, Papier und Kunststoff vorgesehen.In the course of the dual waste collection system, however, households are turned into it the above-mentioned thermoplastics occur to a considerable extent. A Sor categorization into unmixed thermoplastic waste may not be possible. Also be Composite plastics are created, composites made of polyethylene, paper and aluminum foil. A separation according to this collection system is only for the groups metal, glass, Paper and plastic provided.

Für diese Gruppen ist vom Gesetzgeber eine Wiederverwertung zu neuen Produkten in erheblichem Umfang gesetzlich vorgeschrieben worden.For these groups, the law requires recycling for new products have been required by law to a significant extent.

Für Glas und Metall sind Recycling-Verfahren bekannt, die eine Wiederverwertung der Abfälle ermöglichen. Dasselbe gilt für Papierabfälle, nur daß hier die anfallenden Mengen an Papierabfällen den Bedarf aus recyceltem Papier über­ schreiten. Die Forderung, aus den gesammelten in Mischung vorliegenden Kunststoffabfällen neue Produkte herzustellen, kann bisher noch nicht ent­ sprochen werden.Recycling processes are known for glass and metal, which are for recycling of waste. The same applies to paper waste, only that here the amount of paper waste generated from recycled paper stride. The demand from the collected mixed  It is not yet possible to produce plastic waste from new products be spoken.

Deshalb hat sich die Erfindung die Aufgabe gestellt, aus den gemischten Thermo­ plastabfällen, wie sie beispielsweise bei der Sammlung von Haushaltabfällen anfallen, eine Dreischichtplatte zu entwickeln unter Verwendung von Kunststoff­ abfällen verschiedenartiger Thermoplaste unter Zumischung weiterer Abfälle in Form von Altpapier, Sägespäne, feinteiligem Holz aus Holzabfällen als Mittel­ lage, die beiderseits mit dehnsteifen Deckschichten verbunden ist.Therefore, the invention has set itself the task of mixed thermo plastic waste, such as that used for the collection of household waste to develop a three-layer board using plastic waste of various types of thermoplastics with the addition of further waste in the form of waste paper, sawdust, finely divided wood from wood waste as a means layer, which is connected on both sides with rigid outer layers.

Der Grund für die mangelnde Gebrauchstüchtigkeit von Formkörpern aus Mischungen unterschiedlicher Thermoplaste liegt in ihren unterschiedlichen Oberflächen-, resp. Grenzflächenspannungen. Bekanntlich werden Thermoplaste in der Schmelze zu Formkörpern verformt, z. B. nach dem Spritzgieß- oder nach dem Extrusionsver­ fahren. Die unterschiedlichen Grenzflächenspannungen führen in der Schmelze dazu, daß der eine Thermoplast sich im anderen kugelförmig zu sog. "Blasen" zusammen­ zieht. Eine Durchdringung des einen Thermoplasten in den anderen findet nicht statt. Dies führt dazu, daß die Grenze zwischen den beiden Thermoplasten wie ein Haarriß wirkt. Beide Thermoplaste haften nur aneinander.The reason for the lack of suitability for use of molded articles from mixtures different thermoplastics lies in their different surface, resp. Interfacial tensions. Thermoplastics are known to melt deformed into moldings, e.g. B. after the injection molding or after the extrusion process drive. The different interfacial tensions in the melt lead to that the one thermoplastic in the other spherical to so-called "bubbles" together pulls. There is no penetration of one thermoplastic into the other instead of. This causes the boundary between the two thermoplastics to look like one Hairline cracks. Both thermoplastics only stick together.

Unter geringen Belastungen resp. Dehnungen bricht der Formkörper an den Grenz­ flächen. Dies gilt insbesondere für Platten, bei denen eine "Blase" in ihrer Ausdehnung die Dicke der Platte erreichen kann.Under low loads resp. The molded article breaks at the limits surfaces. This is especially true for plates that have a "bubble" in their Expansion can reach the thickness of the plate.

Die Lösung der gestellten Aufgabe zur Überwindung dieses physikalischen Hindernis besteht nun darin,The solution of the task to overcome this physical obstacle now consists in

  • 1. Die "Blasen"-Bildung des einen Thermoplasten im anderen Thermoplasten zu unter­ drücken, indem kleinteiligen nicht-thermoplastische Teilchen wie Papier- resp. Vliesschnitzel, kleinteiliges Holz wie Sägespäne oder Holzmehl oder Blähglim­ mer mit ca. 70 Gew. -% oder mehr, bevorzugt 100 Gew.-% oder mehr der Thermo­ plastmischung (=100%) zugegeben werden, wobei die nicht-thermoplastischen Teilchen mit ihrer größten Ausdehnung parallel oder im wesentlichen parallel zur Ober­ fläche der Dreischichtplatte in ungefähr gleichmäßigem Abstand zueinander im Thermoplastgemisch liegen.1. The "bubble" formation of one thermoplastic in the other thermoplastic to under press by small-sized non-thermoplastic particles such as paper resp. Fleece chips, small pieces of wood such as sawdust or wood flour or expanded glass 70% by weight or more, preferably 100% by weight or more of the thermo plast mixture (= 100%) are added, the non-thermoplastic particles with their greatest extent parallel or essentially parallel to the upper surface of the three-layer board at an approximately uniform distance from each other lie in the thermoplastic mixture.
  • 2. Die Mittellage beiderseitig mit dehnsteifen dünnen Deckschichten verbunden ist mit einem Verhältnis der Deckschichtdicke zur Dicke der Mittellage zwischen 1 : 4 bis 1 : 20 (je Deckschicht).2. The middle layer is connected on both sides with thin, rigid top layers is between a ratio of the cover layer thickness to the thickness of the middle layer 1: 4 to 1: 20 (per top layer).

Die Zumischung der nicht-thermoplastischen Teilchen zu der Mischung verschieden­ artiger Thermoplaste bewirkt bei der oben beschriebenen Verteilung, daß statt der "Blasen" nur dünnschichtige Plättchen entstehen können, deren Dicke höchstens dem Abstand der nicht-thermoplastischen Teilchen entsprechen. Dabei haften die Plättchen an den nicht-thermoplastischen Teilchen, die dabei die Grenzflächen der unterschiedlichen Thermoplaste überbrücken. Die Zugfestigkeit richtet sich somit nicht mehr nach der Haftfestigkeit der unterschiedlichen Thermoplaste an­ einander oder nach der Schwächung des die Matrix bildenden Thermoplasten, sondern nach dem Haftvermögen der Thermoplaste an den nicht-thermoplastischen Teilchen. Evntl. Fehlstellen des Überbrückungsmechanismus können u. U. zu einer Reduktion der Festigkeit führen.The admixture of the non-thermoplastic particles to the mixture is different like thermoplastics causes in the distribution described above that instead the "bubbles" can only form thin-layered platelets, the maximum thickness of which  correspond to the distance of the non-thermoplastic particles. The are liable Platelets on the non-thermoplastic particles, making the interfaces bridging the different thermoplastics. The tensile strength depends therefore no longer according to the adhesive strength of the different thermoplastics each other or after the weakening of the thermoplastic forming the matrix, but on the adherence of the thermoplastics to the non-thermoplastic particles. Possibly. Defects in the bridging mechanism can U. to a reduction of strength.

Dies wird jedoch kompensiert durch die zugfesten und dehnsteifen Deckschichten, wie sie z. B. dünne Schichtstoffpreßmassen darstellen. Diese Deckschichten wirken wie Membrane, die von der Mittelschicht auch unter Biege- und Beulbelastung auf Ab­ stand gehalten werden, wobei die Mittellage die Druckspannungen aufnimmt.However, this is compensated for by the tensile and stretch-resistant cover layers, as they e.g. B. represent thin laminate molding compounds. These cover layers look like Membrane that extends from the middle layer to Ab be maintained, with the middle layer absorbing the compressive stresses.

Der Mittellage können flammhemmende Zusätze etwa auf Bromgrundlage oder Alu­ hydroxid zugesetzt werden, desgleichen Farbstoffe.The middle layer can contain flame retardant additives such as bromine or aluminum hydroxide are added, as are dyes.

Die Beimischung duroplastischer Teilchen oder Schmutzteilchen, wie es bei der Sammlung von Haushalt-Kunststoffteilen möglich ist, verändern nicht die vorteil­ haften Eigenschaften der Dreischichtplatte nach der Erfindung. Die Dreischicht­ platte bleibt steif auch bei dünner Gesamtdicke, die zwischen 1,5 und 20 mm liegt, vorzugsweise zwischen 3 und 12 mm.The admixture of thermosetting particles or dirt particles, as is the case with Collection of household plastic parts is possible, do not change the advantage adhere properties of the three-layer board according to the invention. The three-layer plate remains stiff even with a thin overall thickness that is between 1.5 and 20 mm is preferably between 3 and 12 mm.

Die Wasseraufnahme der Dreischichtplatte liegt unter 1%. Damit eignet sich die Platte vorzüglich für den Möbel- und Hausbau unter feuchten Bedingungen.The water absorption of the three-layer board is less than 1%. This makes the Plate ideal for furniture and house building under damp conditions.

Bei Verwendung von Schichtstoffpreßplatten als Deckschichten läßt sich die Oberfläche durch Lackieren, Prägen und Bedrucken finishieren.When using laminate press plates as cover layers, the Finish the surface by painting, embossing and printing.

Die Verbindung der Deckschichten zur Mittellage erfolgt durch Kleben. Erfahrungs­ gemäß beträgt der Hauptanteil an Abfall-Thermoplasten Polyethylen. Dieser Thermo­ plast läßt sich infolge seiner unpolaren Struktur nur nach Vorbehandlung verkle­ ben. Dies geschieht durch Beflammen der Oberfläche oder durch ionisierende Strah­ len. Bei der Mittellage nach der Erfindung ist dies nicht erforderlich. Die nicht­ thermoplastischen Teilchen an der Oberfläche der Mittellage ergeben die erforder­ liche Haftung.The cover layers are connected to the middle layer by gluing. Experience the majority of waste thermoplastics is polyethylene. This thermo Due to its non-polar structure, plast can only be coated after pretreatment ben. This is done by flaming the surface or by ionizing radiation len. In the middle position according to the invention, this is not necessary. They don't thermoplastic particles on the surface of the middle layer give the required liability.

Bevorzugt werden entweder Kleber auf wässeriger Grundlage oder Klebefilme wegen der einschränken­ den Arbeitsplatzvorschriften bei Klebern auf Lösungsmittelbasis. Geeignet ist ein konfektionierter Harnstoffharzleim oder Ethylenmischpolymerisat-Klebefolien.Either water-based adhesives or adhesive films are preferred because of the restrictions the workplace regulations for solvent-based adhesives. Suitable is  a ready-made urea resin glue or ethylene copolymer adhesive films.

Eine beispielhafte Ausführung zeigen die Fig. 1 und Fig. 2.An exemplary embodiment of Figs. 1 and FIG. 2.

Fig. 1 zeigt einen Schnitt durch einen Teil einer Dreischichtplatte und Fig. 2 zeigt vergrößert einen Teil aus dem Schnitt nach Fig. 1. FIG. 1 shows a section through part of a three-layer plate and FIG. 2 shows an enlarged part of the section according to FIG. 1.

Im einzelnen stellen dar:
1 und 2 die beiden Deckschichten, 3 die Mittellage, 7 den Kleberfilm.
In detail:
1 and 2 the two cover layers, 3 the middle layer, 7 the adhesive film.

In Fig. 2: 1 die Deckschicht, 4 einen Thermoplastanteil der Thermoplastmischung und 5 einen zweiten Thermoplasten. 6 zeigt ein von vielen nicht-thermoplastischen Teilen.In Fig. 2: 1 the cover layer, 4 a thermoplastic portion of the thermoplastic mixture and 5 a second thermoplastic. 6 shows one of many non-thermoplastic parts.

Wie bereits erwähnt gibt es Kunststoff-Verbundabfälle, bei denen Thermoplaste mit Alu-Folien verbunden sind. Die Mittellage der Dreischichtplatte kann bis über 40 Gew.-% Alu-Folie enthalten. Dies ergibt Dreischichtplatte, die wegen ihrer hohen Wichte sich für schalldämmende Zwecke eignen. Außerdem fallen solche Platten unter die Brandklasse B2. Solche Platten laden sich elektrisch nicht auf. Bei einem Einsatz im Möbelbau ziehen sie keinen Staub an.As already mentioned, there is plastic composite waste in which thermoplastics are connected with aluminum foils. The middle layer of the three-layer board can contain up to over 40% by weight of aluminum foil. This results in three-layer panels, which are suitable for soundproofing purposes due to their high weight. In addition, such plates are covered by the fire class B2. Such plates do not charge electrically. When used in furniture construction, they do not attract dust.

Unter dehnsteifer Deckschicht werden hier neben der bevorzugten Schichtpreßstoff­ platte auch Platten aus den Werkstoffen wie Metall, Holz, Papier und faserver­ stärktem Kunststoff beispielhaft verstanden.In addition to the preferred laminate, a rigid top layer is used here plate also plates made of materials such as metal, wood, paper and fiber strengthened plastic understood as an example.

Claims (24)

1. In der Länge nicht beschränkte dreischichtige Platte, bestehend aus einer Mittelschicht und beiderseits Deckschichten, dadurch gekennzeichnet, daß die Mittelschicht aus miteinander nicht verträglichen Thermoplasten besteht, denen kleinteilige nicht-thermoplastische Teilchen in ungefähr gleichmäßiger Verteilung zugefügt sind, und die Deckschichten dehnsteif sind.1. Three-layer plate, not limited in length, consisting of a middle layer and cover layers on both sides, characterized in that the middle layer consists of mutually incompatible thermoplastics, to which small-sized non-thermoplastic particles are added in approximately uniform distribution, and the cover layers are rigid. 2. Dreischichtige Platte nach Anspruch 1, dadurch gekennzeichnet, daß die mit­ einander nicht verträglichen Thermoplaste der Mittelschicht im wesentlichen aus Polyethylen Polystyrol, Polypropylen oder Polyvinylchlorid bestehen, wobei zu der Mischung mindestens zwei dieser Thermoplaste gehören.2. Three-layer plate according to claim 1, characterized in that the mutually incompatible thermoplastics of the middle layer essentially made of polyethylene Polystyrene, polypropylene or polyvinyl chloride exist, adding to the mixture at least two of these thermoplastics belong. 3. Dreischichtige Platte nach Anspruch 1 und 2, dadurch gekennzeichnet, daß der Anteil der kleinteiligen nicht-thermoplastischen Teilchen, bezogen auf den thermoplastischen Anteil, 70% oder mehr beträgt.3. Three-layer plate according to claim 1 and 2, characterized in that the proportion of the small-sized non-thermoplastic particles, based on the thermoplastic content is 70% or more. 4. Dreischichtige Platte nach Anspruch 1 und 2, dadurch gekennzeichnet, daß der Anteil der kleinteiligen nicht-thermoplastischen Teilchen, bezogen auf den thermoplastischen Anteil, 100% oder mehr beträgt.4. Three-layer plate according to claim 1 and 2, characterized in that the proportion of the small-sized non-thermoplastic particles, based on the thermoplastic content is 100% or more. 5. Dreischichtige Platte nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die nicht-thermoplastischen Teilchen aus kleinteiligem Papier bestehen.5. Three-layer plate according to claim 1 to 4, characterized in that the non-thermoplastic particles consist of small-scale paper. 6. Dreischichtige Platte nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die nicht-thermoplastischen Teilchen aus Sägespänen und/oder feinteiligem Holz bestehen.6. Three-layer plate according to claim 1 to 4, characterized in that the non-thermoplastic particles from sawdust and / or fine particles Wood. 7. Dreischichtige Platte nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die nicht-thermoplastischen Teilchen aus Blähglimmer bestehen. 7. Three-layer plate according to claim 1 to 4, characterized in that the non-thermoplastic particles consist of expanded mica.   8. Dreischichtige Platte nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß der Hauptanteil der nicht-thermoplastischen Teilchen aus kleinteiliger Alu-Folie besteht.8. Three-layer plate according to claim 1 to 7, characterized in that the majority of the non-thermoplastic particles from small particles There is aluminum foil. 9. Dreischichtige Platte nach Anspruch 1 bis 8, dadurch gekennzeichnet, daß die nicht-thermoplastischen Teilchen in ihrer größten Ausdehnung parallel oder im wesentlichen parallel zu der Oberfläche der Dreischicht-Platte liegen.9. Three-layer plate according to claim 1 to 8, characterized in that the non-thermoplastic particles parallel in their greatest extent or lie substantially parallel to the surface of the three-layer plate. 10. Dreischichtige Platte nach Anspruch 1 bis 9, dadurch gekennzeichnet, daß die Mittelschicht flammhemmende Zusätze enthält.10. Three-layer plate according to claim 1 to 9, characterized in that the middle class contains flame retardant additives. 11. Dreischichtige Platte nach Anspruch 10, dadurch gekennzeichnet, daß die flammhemmenden Zusätze Bromverbindungen enthalten.11. Three-layer board according to claim 10, characterized in that the flame retardant additives contain bromine compounds. 12. Dreischichtige Platte nach Anspruch 10, dadurch gekennzeichnet, daß die flammhemmenden Zusätze aus Aluminiumhydroxid bestehen.12. Three-layer board according to claim 10, characterized in that the flame retardant additives consist of aluminum hydroxide. 13. Dreischichtige Platte nach Anspruch 1 bis 12, dadurch gekennzeichnet, daß die dehnsteifen Deckschichten aus Schichtstoff-Preßplatten bestehen.13. Three-layer plate according to claim 1 to 12, characterized in that the rigid top layers are made of laminated pressed sheets. 14. Dreischichtige Platte nach Anspruch 1 bis 12, dadurch gekennzeichnet, daß die dehnsteifen Deckschichten aus Leichtmetall oder Stahl bestehen.14. Three-layer plate according to claim 1 to 12, characterized in that the rigid top layers are made of light metal or steel. 15. Dreischichtige Platte nach Anspruch 1 bis 12, dadurch gekennzeichnet, daß die dehnsteifen Deckschichten auf der Grundlage von Papier aufgebaut sind.15. Three-layer plate according to claim 1 to 12, characterized in that the rigid top layers are based on paper. 16. Dreischichtige Platte nach Anspruch 13, dadurch gekennzeichnet, daß die Oberfläche der Schichtstoff-Preßplatte durch Lackieren, Prägen und Bedrucken behandelt ist.16. Three-layer board according to claim 13, characterized in that the Surface of the laminate press plate by painting, embossing and printing is treated. 17. Dreischichtige Platte nach Anspruch 1 bis 12, dadurch gekennzeichnet, daß die dehnsteifen Deckschichten aus Holz bestehen.17. Three-layer board according to claim 1 to 12, characterized in that the rigid top layers are made of wood. 18. Dreischichtige Platte nach Anspruch 1 bis 12, dadurch gekennzeichnet, daß die dehnsteifen Deckschichten aus faserverstärktem Kunststoff bestehen. 18. Three-layer board according to claim 1 to 12, characterized in that the rigid top layers are made of fiber-reinforced plastic.   19. Dreischichtige Platte nach Anspruch 1 bis 18, dadurch gekennzeichnet, daß die Plattendicke zwischen 1,5 und 20 mm beträgt, vorzugsweise zwischen 3 u. 12 mm.19. Three-layer board according to claim 1 to 18, characterized in that the plate thickness is between 1.5 and 20 mm, preferably between 3 u. 12 mm. 20. Dreischichtige Platte nach Anspruch 1 bis 19, dadurch gekennzeichnet, daß das Dickenverhältnis von Mittellage zu jeder der beiden Deckschichten zwischen 1 : 4 und 1 : 20 liegt.20. Three-layer plate according to claim 1 to 19, characterized in that the thickness ratio of the middle layer to each of the two cover layers is between 1: 4 and 1:20. 21. Dreischichtige Platte nach Anspruch 1 bis 20, dadurch gekennzeichnet, daß Mittelschicht und beiderseitige Deckschichten durch Kleben miteinander ver­ bunden sind.21. Three-layer board according to claim 1 to 20, characterized in that Ver middle layer and bilateral cover layers by gluing together are bound. 22. Dreischichtige Platte nach Anspruch 21, dadurch gekennzeichnet, daß das Kleben mittels eines wäßrigen Harnstoffharzleim erfolgt.22. Three-layer board according to claim 21, characterized in that the Gluing is carried out using an aqueous urea resin glue. 23. Dreischichtige Platte nach Anspruch 21, dadurch gekennzeichnet, daß die Verklebung mittels einer Klebefolie erfolgt.23. Three-layer board according to claim 21, characterized in that the Gluing is done with an adhesive film. 24. Dreischichtige Platte nach Anspruch 1-20 und 23, dadurch gekennzeichnet, daß die Klebefolie aus einem Ethylen-Mischpolymerisat besteht.24. Three-layer plate according to claims 1-20 and 23, characterized in that the adhesive film consists of an ethylene copolymer.
DE19914102115 1991-01-25 1991-01-25 Three-layer board Expired - Fee Related DE4102115C2 (en)

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DE4226837A1 (en) * 1992-04-22 1994-02-17 Schnause Rolf Dipl Ing Cooling sheet of extruded thermoplastic and paper waste - uses endless steel band to support sheet while cooling
DE4228409A1 (en) * 1992-08-26 1994-03-03 Messing Oliver Plate for panelling, sepn. or support purposes - has with its core of waste material a cpd. comprising thin layered metal and plastic material.
DE4231097A1 (en) * 1992-09-17 1994-03-24 Evd Gmbh Process for producing a composite particle body and the body produced according to this
DE4333187A1 (en) * 1993-05-25 1995-02-09 Tesch G H Moulding with a web containing paper

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DE2314146A1 (en) * 1972-03-23 1973-10-04 Mitsubishi Petrochemical Co PROCESS FOR EXTRUDING THERMOPLASTIC PLASTIC WITH A HIGH FILL MATERIAL CONTENT
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DE4226837A1 (en) * 1992-04-22 1994-02-17 Schnause Rolf Dipl Ing Cooling sheet of extruded thermoplastic and paper waste - uses endless steel band to support sheet while cooling
DE4228409A1 (en) * 1992-08-26 1994-03-03 Messing Oliver Plate for panelling, sepn. or support purposes - has with its core of waste material a cpd. comprising thin layered metal and plastic material.
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DE4333187A1 (en) * 1993-05-25 1995-02-09 Tesch G H Moulding with a web containing paper

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