EP1237662B1 - Method for providing a plastic coating by means of spraying, device used for said method and use of the layer thereby produced - Google Patents

Method for providing a plastic coating by means of spraying, device used for said method and use of the layer thereby produced Download PDF

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Publication number
EP1237662B1
EP1237662B1 EP00993329A EP00993329A EP1237662B1 EP 1237662 B1 EP1237662 B1 EP 1237662B1 EP 00993329 A EP00993329 A EP 00993329A EP 00993329 A EP00993329 A EP 00993329A EP 1237662 B1 EP1237662 B1 EP 1237662B1
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Prior art keywords
layer
plastic
anyone
powder
spraying
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German (de)
French (fr)
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EP1237662A2 (en
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Michael Dvorak
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DACS DvorakAdvanced Coating Solutions
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DACS DvorakAdvanced Coating Solutions
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/04—Impact or kinetic deposition of particles
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/129—Flame spraying

Definitions

  • the invention relates to a method for plastic coating by means of an injection process.
  • the invention encompasses an apparatus for carrying out the method with a nozzle constriction area and downstream acceleration channel and the use of the layer.
  • Plastic coating means both the coating of plastics - for example, the plastic metallization - as well as with plastics, ie with materials whose essential components consist of such macromolecular organic compounds that are produced synthetically or by modification of natural products.
  • the powder is introduced into the flame from the inside and from the outside in a flame spraying burner.
  • this system allows plastic material to be sprayed on, all materials lose their required properties due to their long residence time and temperature.
  • EP-A-0 921 149 discloses the use of plastics for coating, for example, a cooking pot in which a composite of PPS and an Fe-Ni alloy has been applied by means of a high-speed flame spraying HVOF, wherein the composite powder is agglomerated by mechanical agglomeration HVOF a composite of PPS and an Fe-Ni alloy has been applied, wherein the composite powder has been prepared by mechanical agglomeration.
  • This coating is intended to produce a magnetic material with a given Curie temperature.
  • a high-temperature-resistant plastic is applied by means of thermal spraying at high jet velocity, wherein the plastic is introduced into the colder beam area to prevent the destruction of the plastic powder.
  • the inventor has set the goal to eliminate the identified disadvantages and a favorable process for coating plastic parts without preheating - or even of wood - to worship or for coating with plastic powders or the like. organic substances.
  • a device to be procured In addition, a device to be procured.
  • either a layer of metallic, non-metallic or oxide materials on a plastic element or a layer of plastic on a base material by means of a high-speed injection method with the addition of the powdery material by a gas-controlled - operated with excess pressure and negative pressure - Pulverfärderü applied, preferably by means of a high-speed flame spraying method or a high-speed cold spraying process.
  • a spray material in a particle size range between 0.1 and 150 ⁇ m, in particular 0.5 to 75 ⁇ m, but especially in a particle size range of 1 to 30 ⁇ m.
  • polymeric powdery plastics are adjusted by nanocrystalline additives to the properties of the base material; nanocrystalline powders are proposed as the wettable powder.
  • the layer is applied to a fiber reinforced material, such as a carbon or glass fiber reinforced material.
  • the layer according to the invention can be applied to a plastic, a high-temperature-resistant plastic, to polyurethane, high-performance thermoplastic and / or duroplastic, in particular to polyetheretherketone (PEEK), polyacryletherketone (PAEK), precursors thereof, polyphenylene sulphite (PPS), liquidcrystalline polymer (LCP), Entfunctional oligomers or on polyamides.
  • PEEK polyetheretherketone
  • PAEK polyacryletherketone
  • PPS polyphenylene sulphite
  • LCP liquidcrystalline polymer
  • Entfunctional oligomers or on polyamides.
  • the plastic is to be applied in the context of the invention as a base material or as a base layer on a metal or as a cover layer.
  • a device designed as a high-pressure, high-speed flame-spraying burner is provided with a nozzle constriction area and downstream acceleration channel and with a gas-controlled powder delivery unit which can advantageously be operated with overpressure and under reduced pressure.
  • the pulverulent spraying material is preferably supplied centrally to the high-speed flame near the nozzle constriction area and in front of the acceleration channel, wherein according to another feature of the invention at least one feed device for the pulverulent spraying material arranged radially to the high-speed flame is provided.
  • Another measure according to the invention is to be considered that the pressure range for the flame jet of the high-pressure Hochgeschwindigkcits flame spray burner with a high pressure of 0.50 to 5 MPa (5 to 50 bar) - preferably 1.0 to 2.5 MPa (10 to 25 bar) - operate is.
  • the powder conveyor should be pressure-controlled and pressure-coupled between the powder storage container and the powder outlet to the sprayer.
  • the layer according to the invention - as stated on plastic material applied - can be used for producing a sliding bearing or a sliding layer, also for an electrically conductive layer or a magnetic layer. It is also possible to produce an insulating layer, an anti-adhesion layer or a biologically active layer.
  • the mentioned plastic parts can be coated without preheating or applied in a corresponding manner plastic layers on base materials.
  • a pistol-like flame spray burner 10 after Fig. 1 contains a - near the rear wall 12 of a combustion chamber 14 opening - axial feed tube 18 for the spray or material to be processed. This is connected to an indicated at 20 powder delivery unit, in which a volume is sucked in with negative pressure and forwarded with overpressure.
  • the combustion chamber 14 which tapers in a region 16 of the axial length a in the spraying direction x, merges into a tubular acceleration passage 22 with an end mouth 24 for the high-speed flame F.
  • the flame spray burner 10 a of Fig. 2 is provided between the tapered portion 16 of the combustion chamber 14 and the acceleration channel 22 with a Einschnürzone 26, which is defined by a narrow passage section 28. This is the mouths of two radial feed tubes 19 downstream in the injection direction x.
  • base materials are suitable for the process described herein metallic and plastic materials, such as polyurethane, high temperature resistant plastics, high performance thermoplastics and / or thermosetting plastics.
  • metallic base materials intermediate layers are used to reduce the stresses to compensate for the differences in the coefficient of expansion or to reduce them, for example if a wear layer of hard materials - such as borides, carbides, nitrides, silicides and / or oxides on a fiber-reinforced material - with and should be sprayed without metal or plastic binder.
  • hard plastic tools or parts thereof are used in the manufacture of small series - or for changes to such tools - to reduce costs.
  • a high-pressure flame spraying process operating at high pressure can be used in view of the low temperature load on the base material.
  • a HD-HVOF high-pressure flame spraying
  • a spray powder here was a tungsten carbide / cobalt 88/12 with a particle size distribution of 1 to 20 microns.
  • Example 1 the execution as described in Example 1 with the difference that the transition layer for better adaptation to the base material or to adjust the expansion coefficients had a graded structure (PEEK aluminum oxide).
  • This embodiment also corresponded to that of Example 1, although the transition layer for better adaptation to the base material or for adjusting the expansion coefficients and the electrical conductivity of a spray material of the composition PEEK aluminum oxide copper.
  • Example 3 This corresponded to Example 3 with the difference of a galvanically or electrochemically applied wear layer.
  • the finished coating produced according to Example 4 was post-treated before use with a heat treatment in the temperature range of 150 to 350 ° C.
  • a wear protection layer with high dielectric strength and low tendency to adhere has been applied to improve durability and resistance to moisture.
  • the spraying plant was an HD HVOF facility with an underpressure and underpressure working powder delivery unit used.
  • the layer thickness should be 500 ⁇ m.
  • the spray powder used was a mixture of 70 to 98% by weight of polyetheretherketone (PEEK) and 2 to 30% by weight of nanocrystalline oxides having a particle size distribution of 1 to 20 ⁇ m.
  • PEEK polyetheretherketone
  • the values and service lives found were significantly higher than those without a coating.
  • Example 6 Corresponded to Example 6, wherein the coating had a graded structure.
  • the HD-HVOF process was used and a layer of 500 ⁇ m thickness with the following composition was applied: the powdered spray material consisted of a mixture of a polyurethane powder and a nanocrystalline one Copper powder in the ratio 90/10; the grain distribution was 1 to 75 ⁇ m.
  • This layer showed a much longer service life compared to the usual copper-containing paints and offered better ecological compatibility.
  • Carbon-fiber-reinforced implants for knee or hip joints can only be used to a limited extent to date, since the hydroxyapatite can not be sprayed onto this material. Therefore, with the HD-HVOF method, an intermediate layer compatible with this base material and the human body and then the biostable layer, for example hydroxylapatite, was sprayed on.
  • the intermediate layer with a layer thickness of 50 ⁇ m consisted of powdered PPS and Al oxide in a mixing ratio of 10 to 40 parts Al oxide, balance PPS.
  • a reactor vessel for the chemical industry should be provided with a corrosion-resistant and magnetic protective layer to control the reactions to be carried out therein.
  • the coating should be done with the HD-HVOF method and the applied layer has a layer thickness of 700 microns.
  • the powdery material used was a mixture of PEEK, Si oxide, Al oxide and nanocrystalline ferrite.
  • the composition was Si-oxide 5 to 20 wt .-%, Al oxide 10 to 20 wt .-% and balance PEEK. Due to the ferrite grain size, the Curie point of the coating was set at 280 ° C. The grain distribution was 1 to 40 microns.
  • the layer was re-sintered by induction.
  • a weatherproof protective layer of a layer thickness of 200 ⁇ m was to be applied on a wooden crag for a playground using the HD-HVOF process.
  • the protective layer thus prepared had excellent weather resistance and also showed a nice black color.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The invention relates to a method for providing a plastic coating by means of spraying. According to said method, a layer of metal, non-metal or oxide materials is applied to a plastic element or a plastic layer is applied to a base material by means of high-pressure spraying while adding the powdered material by means of a gas-controlled powder feeder.

Description

Die Erfindung betrifft ein Verfahren zur Kunststoffbeschichtung mittels eines Spritzvorganges. Zudem erfasst die Erfindung eine Vorrichtung zur Durchführung des Verfahrens mit einem Düseneinschnürungsbereich und nachgeschaltetem Beschleunigungskanal sowie die Verwendung der Schicht.The invention relates to a method for plastic coating by means of an injection process. In addition, the invention encompasses an apparatus for carrying out the method with a nozzle constriction area and downstream acceleration channel and the use of the layer.

Unter Kunststoffbeschichtung versteht man sowohl das Beschichten von Kunststoffen - beispielsweise die Kunststoffmetallisierung - als auch mit Kunststoffen, also mit Materialien, deren wesentliche Bestandteile aus solchen makromolekularen organischen Verbindungen bestehen, die synthetisch oder durch Abwandeln von Naturprodukten entstehen.Plastic coating means both the coating of plastics - for example, the plastic metallization - as well as with plastics, ie with materials whose essential components consist of such macromolecular organic compounds that are produced synthetically or by modification of natural products.

Das Auftragen solcher Plastikwerkstoffe mit und ohne Füllung durch thermische Spritzverfahren, wie etwa Flammspritzen und Plasmaspritzen mit pulverförmigem oder drahtförmigem Spritzwerkstoff, ist seit langem bekannt. Das bei all diesen Verfahren auftretende Problem ist, dass beim Aufschmelzen des Plastikwerkstoffes dieser in vielen Fällen - bedingt durch die Verweilzeit im Strahl und die thermische Beeinflussung - strukturell verändert wird und dadurch seine Stabilität in Hinsicht auf die Beständigkeit verliert; bei allen bekannten Verfahren ist es notwendig, die zu beschichtende Oberfläche auf die - oder nahe an die - Schmelztemperatur vorzuwärmen.The application of such plastic materials with and without filling by thermal spraying methods, such as flame spraying and plasma spraying with powdered or wire-shaped spray material, has long been known. The problem encountered with all these methods is that when the plastic material melts, it is structurally changed in many cases - due to the residence time in the jet and the thermal influence - and thus loses its stability in terms of durability; In all known processes, it is necessary to preheat the surface to be coated to - or close to - the melting temperature.

Bei einem der US-A-5 282 573 zu entnehmenden Flammspritzverfahren wird in einen Flammspritzbrenner das Pulver von innen und von aussen in die Flamme eingeführt. Obwohl diese Anlage ein Aufspritzen von Plastikwerkstoff erlaubt, verlieren alle Werkstoffe durch lange Verweilzeit und zu hohe Temperatur ihre erforderlichen Eigenschaften.At one of the US-A-5,282,573 To be taken flame spraying process, the powder is introduced into the flame from the inside and from the outside in a flame spraying burner. Although this system allows plastic material to be sprayed on, all materials lose their required properties due to their long residence time and temperature.

Auch Versuche, den Plastikwerkstoff von aussen in einem gewissen Abstand in die Plasmaflamme einzubringen, wie in der DE-C-41 29 120 beschrieben, zeigte keine guten Ergebnisse, da auch hier die aufgebrauchte Schicht im Vergleich zum nicht gespritzten Werkstoff schlechtere Eigenschaften aufwies.Also, attempts to bring the plastic material from the outside at a certain distance in the plasma flame, as in the DE-C-41 29 120 described, showed no good results, since here too the used-up layer had inferior properties compared to the non-sprayed material.

Die Druckschrift EP-A-0 921 149 offenbart die Verwendung von Kunststoffen für die Beschichtung von beispielsweise eines Kochtopfes, bei dem mittels eines Hochgeschwindigkeitsflammspritzens HVOF ein Verbundwerkstoff aus PPS und einer Fe-Ni Legierung aufgetragen worden ist, wobei das Verbundpulver durch mechanisches Agglomerieren HVOF ein Verbundwerkstoff aus PPS und einer Fe-Ni Legierung aufgetragen worden ist, wobei das Verbundpulver durch mechanisches Agglomerieren hergestellt worden ist. Mit diesem Beschichten wird bezweckt, einen Magnetwerkstoff mit einer vorgegebenen Curie-Temperatur zu erzeugen.The publication EP-A-0 921 149 discloses the use of plastics for coating, for example, a cooking pot in which a composite of PPS and an Fe-Ni alloy has been applied by means of a high-speed flame spraying HVOF, wherein the composite powder is agglomerated by mechanical agglomeration HVOF a composite of PPS and an Fe-Ni alloy has been applied, wherein the composite powder has been prepared by mechanical agglomeration. This coating is intended to produce a magnetic material with a given Curie temperature.

Bei einem Verfahren zum Beschichten von Substraten nach der Druckschrift EP-A-0 532 134 wird ein hochtemperaturbeständiger Kunststoff mittels thermischem Spritzverfahren mit hoher Strahlgeschwindigkeit aufgebracht, wobei der Kunststoff in den kälteren Strahlbereich eingebracht wird, um die Zerstörung der Kunststoffpulver zu verhindern.In a method for coating substrates according to the document EP-A-0 532 134 a high-temperature-resistant plastic is applied by means of thermal spraying at high jet velocity, wherein the plastic is introduced into the colder beam area to prevent the destruction of the plastic powder.

Ein wesentliches Problem bei diesen Versuchen bestand darin, dass immer sehr hohe thermische und relativ niedrige kinetische Energie zum Aufspritzen verwendet wurden, da die eingesetzten Spritzgeräte in allen Fällen für höher schmelzende Metalle konstruiert waren.A major problem with these trials was that very high thermal and relatively low kinetic energy was used to spray since the sprayers used were in all cases designed for higher melting metals.

In Kenntnis dieser Gegebenheiten hat sich der Erfinder das Ziel gesetzt, die erkannten Nachteile zu beseitigen und ein günstiges Verfahren zum Beschichten von Kunststoffteilen ohne Vorwärmung - oder auch von Holz - anzubeten bzw. zum Beschichten mit Kunststoffpulvern od.dgl. organischen Stoffen. Zudem soll eine Vorrichtung dazu beschaffen werden.Knowing these circumstances, the inventor has set the goal to eliminate the identified disadvantages and a favorable process for coating plastic parts without preheating - or even of wood - to worship or for coating with plastic powders or the like. organic substances. In addition, a device to be procured.

Die Aufgabe ist erfindungsgemäss durch die Merkmale des Anspruches 1 gelöst. Bevorzugte Ausführungsformen sind in den Ansprüchen 2 bis 12 beansprucht. In Anspruch 13 wird die Verwendung einer durch das Verfahren hergestellte Schicht beansprucht.The object is achieved by the features of claim 1. Preferred embodiments are claimed in claims 2 to 12. Claim 13 claims the use of a layer produced by the process.

Erfindungsgemäss wird entweder eine Schicht aus metallischen, nichtmetallischen oder oxidischen Werkstoffen auf ein Kunststoffelement oder aber eine Schicht aus Kunststoff auf einen Grundwerkstoff mittels eines Hochgeschwindigkeits-Spritzverfahrens unter Zugabe des pulverförmigen Werkstoffes durch eine gasgesteuerte -- mit Ueberdruck und Unterdruck betriebene -- Pulverfärdereinheit aufgetragen, dies bevorzugt mittels eines Hochgeschwindigkeits-Flammspritzverfahren oder eines Hochgeschwindigkeits-Kaltspritzverfahrens.According to the invention, either a layer of metallic, non-metallic or oxide materials on a plastic element or a layer of plastic on a base material by means of a high-speed injection method with the addition of the powdery material by a gas-controlled - operated with excess pressure and negative pressure - Pulverfärdereinheit applied, preferably by means of a high-speed flame spraying method or a high-speed cold spraying process.

Als günstig hat es sich erwiesen, einen Spritzwerkstoff in einem Korngrößenbereich zwischen 0,1 und 150 µm, insbesondere 0,5 bis 75 µm, einzusetzen, besonders aber in einem Korngrößenbereich von 1 bis 30 µm.It has proved to be favorable to use a spray material in a particle size range between 0.1 and 150 μm, in particular 0.5 to 75 μm, but especially in a particle size range of 1 to 30 μm.

Nach einem anderen Merkmal des erfindungsgemäßen Verfahrens werden polymere pulverförmige Kunststoffe durch nanokristalline Zusätze auf die Eigenschaften des Grundwerkstoffes eingestellt; als Spritzpulver werden nanokristalline Pulver vorgeschlagen.According to another feature of the method according to the invention polymeric powdery plastics are adjusted by nanocrystalline additives to the properties of the base material; nanocrystalline powders are proposed as the wettable powder.

Gute Resultate werden dann erreicht, wenn die Schicht auf einen faserverstärkten Werkstoff aufgebracht wird, etwa einen durch Kohle- oder Glasfasern verstärkten Werkstoff.Good results are achieved when the layer is applied to a fiber reinforced material, such as a carbon or glass fiber reinforced material.

Zum anderen kann die erfindungsgemäße Schicht auf einen Kunststoff, einen hochtemperaturbeständigen Kunststoff, auf Polyurethan, Hochleistungsthermoplast und/oder Duroplast aufgetragen werden, insbesondere auf Polyetheretherketon (PEEK), Polyacryletherketon (PAEK), deren Vorstufen, Polyphenylensulfit (PPS), Liquidcristallinepolymer (LCP), Entfunctionale Oligomere oder auf Polyamide.On the other hand, the layer according to the invention can be applied to a plastic, a high-temperature-resistant plastic, to polyurethane, high-performance thermoplastic and / or duroplastic, in particular to polyetheretherketone (PEEK), polyacryletherketone (PAEK), precursors thereof, polyphenylene sulphite (PPS), liquidcrystalline polymer (LCP), Entfunctional oligomers or on polyamides.

Der Kunststoff soll im Rahmen der Erfindung als Grundwerkstoff oder als Basisschicht auf einem Metall oder als Deckschicht aufgetragen werden.The plastic is to be applied in the context of the invention as a base material or as a base layer on a metal or as a cover layer.

Im Rahmen der Erfindung liegt eine als Hochdruck-Hochgeschwindigkeits-Flammspritzbrenner ausgebildete Vorrichtung mit einem Düseneinschnürungsbereich und nachgeschaltetem Beschleunigungskanal sowie mit einer gasgesteuerten Pulverfördereinheit, die vorteilhafterweise mit Überdruck sowie mit Unterdruck betrieben zu werden vermag. In diesem Hochdruck-Hochgeschwindigkeits-Flammspritzbrenner wird der pulverförmige Spritzwerkstoff bevorzugt zentral der Hochgeschwindigkeitsflamme nahe dem Düseneinschnürungebereich und vor dem Beschleunigungskanal zugeführt, wobei nach einem anderen Merkmal der Erfindung wenigstens eine radial zur Hochgeschwindigkeitsflamme angeordnete Zuführeinrichtung für den pulverförmigen Spritzwerkstoff vorgesehen ist.In the context of the invention, a device designed as a high-pressure, high-speed flame-spraying burner is provided with a nozzle constriction area and downstream acceleration channel and with a gas-controlled powder delivery unit which can advantageously be operated with overpressure and under reduced pressure. In this high-pressure high-pressure flame spraying burner, the pulverulent spraying material is preferably supplied centrally to the high-speed flame near the nozzle constriction area and in front of the acceleration channel, wherein according to another feature of the invention at least one feed device for the pulverulent spraying material arranged radially to the high-speed flame is provided.

Als weitere erfindungsgemäße Maßnahme ist anzusehen, dass der Druckbereich für den Flammenstrahl des Hochdruck-Hochgeschwindigkcits-Flammspritzbrenners mit einem Hochdruck von 0.50 bis 5 MPa (5 bis 50 bar) -- vorzugsweise 1.0 bis 2.5 MPa (10 bis 25 bar) -- zu betreiben ist. Zudem soll der Pulverförderer zwischen dem Pulverlagerbehälter und dem Pulveraustritt zum Spritzgerät druckgesteuert und druckgekoppelt sein.Another measure according to the invention is to be considered that the pressure range for the flame jet of the high-pressure Hochgeschwindigkcits flame spray burner with a high pressure of 0.50 to 5 MPa (5 to 50 bar) - preferably 1.0 to 2.5 MPa (10 to 25 bar) - operate is. In addition, the powder conveyor should be pressure-controlled and pressure-coupled between the powder storage container and the powder outlet to the sprayer.

Dank dieser Maßgaben hat sich gezeigt, dass es möglich ist, mit dem erfindungsgemäßen Rochdaruck-Hochgeschwindigkeits-Flammspritzbrcnner bei der Einführung des pulverförmigen Werkstoffes axial oder radial nahe oder in der Einschnürzone vor dem oder im Beschleunigungskanal zugeführt werden, wodurch die Plastikworkstoffe ohne Veränderung der Struktur und ohne Substrat Vorwärmung aufgespritzt werden können. Eine weitere Notwendigkeit ist es, einen druckentkoppelten, durch Unter-und Überdruck gesteuerten Pulverförderer zu verwenden, da nur ein solcher es erlaubt, den pulverförmigen Spritzwerkstoff in der beschriebenen Stelle in den Flammenkanal einzubringen und mit einer ausreichenden Genauigkeit die beschriebenen Spritzwerkstoffe zu fördern.Thanks to these provisos, it has been found that it is possible to be fed with the Rochdaruck high-speed Flammspritzbrcnner invention when introducing the powdery material axially or radially near or in the Einschnürzone before or in the acceleration channel, whereby the plastic materials without changing the structure and Without substrate preheating can be sprayed. Another necessity is it is to use a pressure-decoupled, controlled by under- and overpressure powder conveyor, since only one such allows to introduce the powdered spray material in the described location in the flame channel and to promote the spray materials described with sufficient accuracy.

Von Bedeutung ist bei einer in der beschriebenen Weise mittels des Hochgeschwindigkeits-Spritzverfahrens auf Plastikwerkstoff aufgebrachten Schicht, dass sie zu einer Verbesserung sowohl der Verschleißfestigkeit als auch der Korossionsbeständigkeit des Grundwerkstoffes beiträgt.Of importance in a described manner by means of the high-speed injection method applied to plastic material layer that it contributes to an improvement in both the wear resistance and the Korossionsbeständigkeit of the base material.

Die erfindungsgemäße -- wie gesagt auf Plastikwerkstoff aufgebrachte -- Schicht kann zum Herstellen eines Gleitlagers bzw. einer Gleitschicht eingesetzt werden, ebenfalls für eine elektrisch leitende Schicht oder eine magnetische Schicht. Auch die Erzeugung einer Isolierschicht, einer Antihaftschicht oder einer biologisch aktiven Schicht ist möglich.The layer according to the invention - as stated on plastic material applied - can be used for producing a sliding bearing or a sliding layer, also for an electrically conductive layer or a magnetic layer. It is also possible to produce an insulating layer, an anti-adhesion layer or a biologically active layer.

Im Rahmen der Erfindung liegt schließlich die Verwendung solcher auf einem Plastikwerkstoff entstandener Schichten sowohl in der Automobil-Industrie oder im Maschinenbau als auch in der chemischen Industrie sowie im Schiffs- und Bootsbau. Ein weiteres Anwendungsgebiet ist die Medizintechnik.In the context of the invention, finally, the use of such incurred on a plastic material layers in both the automotive industry or in mechanical engineering as well as in the chemical industry and in ship and boat building. Another field of application is medical technology.

Dank der erfindungsgemäßen Vorgehensweise, i.w. thermische Energie weitgehend durch kinetische zu ersetzen, können die erwähnten Kunststoffteile ohne Vorwärmen beschichtet bzw. in entsprechender Weise Kunststoffschichten auf Grundwerkstoffe aufgetragen werden.Thanks to the procedure according to the invention, iw thermal energy to replace largely by kinetic, the mentioned plastic parts can be coated without preheating or applied in a corresponding manner plastic layers on base materials.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigt in ihren beiden Figuren jeweils einen schematisierten Längsschnitt durch einen Hochdruck-Hochgeschwindigkeits-Flammspritzbrenner (HD-HVOF) und zwar in

Fig. 1:
einen Flammspritzbrenner mit axialer Pulverzuführung;
Fig. 2:
einen Flammspritzbrenner mit radialer Pulverzuführung.
Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing; this shows in each of its two figures a schematic longitudinal section through a high-pressure high-speed flame-spraying burner (HD-HVOF), specifically in FIG
Fig. 1:
a Flammspritzbrenner with axial powder supply;
Fig. 2:
a Flammspritzbrenner with radial powder feed.

Ein pistolenartiger Flammspritzbrenner 10 nach Fig. 1 enthält ein -- nahe der Rückwand 12 einer Brennkammer 14 mündendes -- axiales Zuführrohr 18 für den zu verarbeitenden Spritz- oder Werkstoff. Dieses ist an eine bei 20 angedeutete Pulverfördereinheit angeschlossen, bei der ein Volumen mit Unterdruck angesaugt sowie mit Überdruck weitergeleitet wird.A pistol-like flame spray burner 10 after Fig. 1 contains a - near the rear wall 12 of a combustion chamber 14 opening - axial feed tube 18 for the spray or material to be processed. This is connected to an indicated at 20 powder delivery unit, in which a volume is sucked in with negative pressure and forwarded with overpressure.

Die sich in einem Bereich 16 der axialen Länge a in Spritzrichtung x verjüngende Brennkammer 14 geht in einen rohrartigen Beschleunigungskanal 22 mit endwärtiger Mündung 24 für die Hochgeschwindigkeitsflamme F über.The combustion chamber 14, which tapers in a region 16 of the axial length a in the spraying direction x, merges into a tubular acceleration passage 22 with an end mouth 24 for the high-speed flame F.

Der Flammspritzbrenner 10a der Fig. 2 ist zwischen dem sich verjüngenden Bereich 16 der Brennkammer 14 und dem Beschleunigungskanal 22 mit einer Einschnürzone 26 ausgestattet, die von einem engen Durchgangsquerschnitt 28 definiert ist. Diesem sind die Mündungen zweier radialer Zuführrohre 19 in Spritzrichtung x nachgeordnet.The flame spray burner 10 a of Fig. 2 is provided between the tapered portion 16 of the combustion chamber 14 and the acceleration channel 22 with a Einschnürzone 26, which is defined by a narrow passage section 28. This is the mouths of two radial feed tubes 19 downstream in the injection direction x.

Mit diesem pistolenartigen Flammspritzbrenner 10, 10adenen jeweils eine gasgesteuerte Pulverfördereinheit zugeordnet ist -- werden ein Flammendruck in der Brennkammer bzw. im Bereich des Pulverinjektionspunktes zwischen 0.5 bis 5 MPa (5 bis 50 bar), vorzugsweise 1 bis 2.5 MPa (10 bis 25 bar), und eine sehr hohe Flammengeschwindigkeit im Bereich bis zu Mach 3 erreicht. Infolge des hohen Arbeitsdruckes werden die Spritzpulverpartikel wesentlich besser beschleunigt, und die Wärmeeinbringung wird auf ein Minimum reduziert.With this pistol-like flame spraying burner 10, 10 a each associated with a gas-controlled powder delivery unit - are a flame pressure in the combustion chamber or in the region of the powder injection point between 0.5 to 5 MPa (5 to 50 bar), preferably 1 to 2.5 MPa (10 to 25 bar), and reaches a very high flame speed in the range up to Mach 3. Due to the high working pressure, the spray powder particles are accelerated much better, and the heat input is reduced to a minimum.

Als Grundwerkstoffe eignen sich für das hier beschriebene Verfahren metallische und Plastikwerkstoffe, wie etwa Polyurethan, hochtemperaturbeständige Kunststoffe, Hochleistungsthermoplaste und/oder Duroplaste. Bei metallischen Grundwerkstoffen werden Zwischenschichten zum Abbau der Spannungen zur Kompensation der Unterschiede im Ausdehnungskoeffizient oder zum Abbau derselben aufgetragen, beispielsweise wenn auf einen faserverstärkten Werkstoff eine Verschleißschicht aus hartstoffen -- etwa aus Boriden, Karbiden, Nitriden, Siliciden und/oder Oxide -- mit und ohne Metall- oder Plastikbinder aufgespritzt werden soll.As base materials are suitable for the process described herein metallic and plastic materials, such as polyurethane, high temperature resistant plastics, high performance thermoplastics and / or thermosetting plastics. In the case of metallic base materials, intermediate layers are used to reduce the stresses to compensate for the differences in the coefficient of expansion or to reduce them, for example if a wear layer of hard materials - such as borides, carbides, nitrides, silicides and / or oxides on a fiber-reinforced material - with and should be sprayed without metal or plastic binder.

Die bei Zwischen- und Deckschichten verwendeten hochtemperaturbeständigen Kunststoffe sind:

  • Polyetheretherketon (PEEK);
  • Polyacryletherketone (PAEK) und deren Vorstufen;
  • Polyphenylensulfit (PPS);
  • Liquidcristallinepolymer (LCP);
  • Entfunctionale Oligomere oder
  • Polimide,
die je nach den anstehenden Problemen mit oxidischen und/oder nanokristallinen Werkstoffen gefüllt sein können bzw. als Werkstoffmischung verwendet werden, um die Eigenschaften dem Anforderungsprofil optimal anzupassen.The high-temperature resistant plastics used in intermediate and outer layers are:
  • Polyetheretherketone (PEEK);
  • Polyacryletherketones (PAEK) and their precursors;
  • Polyphenylene sulfite (PPS);
  • Liquid Crystalline Polymer (LCP);
  • Entfunctional oligomers or
  • Polimide,
which can be filled depending on the upcoming problems with oxidic and / or nanocrystalline materials or used as a material mixture to optimally adapt the properties of the requirements profile.

Nur wenn mit einem solchen Verfahren gearbeitet wird und die Abstimmung der Spritzwerkstoffe auf die Eigenschaften des Grundwerkstoffes -- wie etwa des Ausdehnungskoeffizienten -- sowie die Schichtfolge eingehalten werden, können Schichten auf metallische, nichtmetallische und plastische Grundwerkstoffe mit Erfolg aufgebracht werden.Only when working with such a method and the coordination of the spray materials on the properties of the base material - such as the expansion coefficient - and the sequence of layers are met, layers can be applied to metallic, non-metallic and plastic base materials with success.

Beispiel 1 :Example 1 :

Im Werkzeugbau für Karosserieteile werden beim Herstellen von Kleinserien -- oder für Änderungen an derartigen Werkzeugen -- zur Kostensenkung Hartplastikwerkzeuge oder Teile davon verwendet. Um diese Werkzeuge mit einer verschleißfesten Schicht zu versehen, ist im Hinblick auf die geringe Temperaturbelastung des Grundwerkstoffes nur ein mit hohem Druck arbeitendes Hochgeschwindigkeitsflammspritz-Verfahren einsetzbar.In tool making for body parts, hard plastic tools or parts thereof are used in the manufacture of small series - or for changes to such tools - to reduce costs. In order to provide these tools with a wear-resistant layer, only a high-pressure flame spraying process operating at high pressure can be used in view of the low temperature load on the base material.

Bei Versuchen wurde als Übergangsschicht eine Werkzeug-Verschleißbeschichtung einer Schichtdicke von 200 µm mittels eines HD-HVOF (Hochdruck-HochgeschwindigkeitsFlammspritz-) Verfahrens aufgebracht aus Polyetheretherketon mit einem Zusatz von Aluminium-Oxiden von 1 bis 30 Gew.-% und einer Kornverteilung für das Spritzpulver von 1 bis 50 µm.In experiments, as a transition layer, a tool wear coating of a layer thickness of 200 microns by means of a HD-HVOF (high-pressure flame spraying) method applied from polyetheretherketone with an addition of aluminum oxides from 1 to 30 wt .-% and a particle size distribution for the spray powder from 1 to 50 μm.

Es folgte eine Zwischenschicht aus Kupfer mit einer Schichtdicke von 100 µm, die mit einer Lichtbogendrahtspritzpistole aufgespritzt wird, und auf dieser wurde eine Deckschicht bzw. Verschleißschicht mit einer Schichtdicke von 40 µm aufgebaut, für die ebenfalls ein HD-HVOF-Verfahren eingesetzt wurde. Als Spritzpulver diente hier ein Wolframkarbid/Kobalt 88/12 mit einer Kornverteilung von 1 bis 20 µm.This was followed by an intermediate layer of copper with a layer thickness of 100 .mu.m, which is sprayed with an arc wire spray gun, and on this a covering layer or wear layer was built with a layer thickness of 40 microns, for which also a HD-HVOF process was used. As a spray powder here was a tungsten carbide / cobalt 88/12 with a particle size distribution of 1 to 20 microns.

Durch das Aufbringen dieser Beschichtung wurde eine wesentlich höhere Standzeit für das Werkzeug erreicht.By applying this coating a much longer tool life was achieved.

BEISPIEL 2:EXAMPLE 2

Hier erfolgte die Ausführung wie zu Beispiel 1 beschrieben mit dem Unterschied, dass die Übergangsschicht zum besseren Anpassen an den Grundwerkstoff bzw. zum Anpassen der Ausdehnungskoeffizienten einen gradierten Aufbau (PEEK-Aluminium-Oxid) aufwies.Here, the execution as described in Example 1 with the difference that the transition layer for better adaptation to the base material or to adjust the expansion coefficients had a graded structure (PEEK aluminum oxide).

BEISPIEL 3:EXAMPLE 3

Auch diese Ausführung entsprach jener nach Beispiel 1, wobei allerdings die Übergangsschicht zum besseren Anpassen an den Grundwerkstoff bzw. zum Anpassen der Ausdehnungskoeffizienten und der elektrischen Leitfähigkeit aus einem Spritzwerkstoff der Zusammensetzung PEEK-Aluminium-Oxid-Kupfer besteht.This embodiment also corresponded to that of Example 1, although the transition layer for better adaptation to the base material or for adjusting the expansion coefficients and the electrical conductivity of a spray material of the composition PEEK aluminum oxide copper.

BEISPIEL 4:EXAMPLE 4

Dieses entsprach dem Beispiel 3 mit dem Unterschied einer galvanisch oder elektrochemisch aufgebrachten Verschleißschicht.This corresponded to Example 3 with the difference of a galvanically or electrochemically applied wear layer.

BEISPIEL 5:EXAMPLE 5

Hierbei wurde die nach Beispiel 4 erzeugte fertige Beschichtung vor dem Einsatz mit einer Wärmebehandlung im Temperaturbereich von 150 bis 350°C nachbehandelt.Here, the finished coating produced according to Example 4 was post-treated before use with a heat treatment in the temperature range of 150 to 350 ° C.

BEISPIEL 6:EXAMPLE 6

Auf Walzenrollen für die Papierindustrie wurde zur Verbesserung der Standzeiten und der Beständigkeit gegen Feuchtigkeit eine Verschleißschutzschicht mit hoher Durchschlagsfestigkeit und niedriger Klebeneigung aufgetragen. Als Spritzanlage wurde eine HD-HVOF-Einrichtung mit einer unter Überdruck und Unterdruck arbeitenden Pulverfördereinheit verwendet. Die Schichtdicke sollte 500 µm betragen.On roll rolls for the paper industry, a wear protection layer with high dielectric strength and low tendency to adhere has been applied to improve durability and resistance to moisture. The spraying plant was an HD HVOF facility with an underpressure and underpressure working powder delivery unit used. The layer thickness should be 500 μm.

Als Spritzpulver wurde ein Gemisch aus 70 bis 98 Gew.-% Polyetheretherketon (PEEK) und 2 bis 30 Gew.-% nanokristallinen Oxiden einer Kornverteilung von 1 bis 20 µm eingesetzt. Die gefundenen Werte und Standzeiten lagen gegenüber denen ohne Beschichtung wesentlich höher.The spray powder used was a mixture of 70 to 98% by weight of polyetheretherketone (PEEK) and 2 to 30% by weight of nanocrystalline oxides having a particle size distribution of 1 to 20 μm. The values and service lives found were significantly higher than those without a coating.

BEISPIEL 7:EXAMPLE 7

Entsprach dem Beispiel 6, wobei die Beschichtung einen gradierten Aufbau aufwies.Corresponded to Example 6, wherein the coating had a graded structure.

BEISPIEL 8:EXAMPLE 8

Auch dieses entsprach dem Beispiel 6, allerdings unter Einsatz eines Faserverbundwerkztoffes als Grundwerkstoff.This also corresponded to Example 6, but with the use of a Faserverbundwerkoffoffes as base material.

BEISPIEL 9:EXAMPLE 9

Beim Aufspritzen einer Antifäulnis-Schicht auf einen aus Kunststoff hergestellten Boots- oder Schiffskörper wurde das HD-HVOF-Verfahren eingesetzt und eine Schicht einer Schichtdicke von 500 µm mit der folgenden Zusammensetzung aufgebracht: der pulverförmige Spritzwerkstoff bestand aus einem Gemisch von einem Polyurethanpulver sowie einem nanokristallinen Kupferpulver im Verhältnis 90/10; die Kornverteilung betrug 1 bis 75 µm.When an antifouling layer was sprayed onto a boat or hull made of plastic, the HD-HVOF process was used and a layer of 500 μm thickness with the following composition was applied: the powdered spray material consisted of a mixture of a polyurethane powder and a nanocrystalline one Copper powder in the ratio 90/10; the grain distribution was 1 to 75 μm.

Diese Schicht zeigte gegenüber den sonst üblichen kupferhaltigen Farbanstrichen eine wesentlich höhere Standzeit und bot eine bessere ökologische Verträglichkeit an.This layer showed a much longer service life compared to the usual copper-containing paints and offered better ecological compatibility.

BEISPIEL 10:EXAMPLE 10

Kohlefaserverstärkte Implantate für Knie- oder Hüftgelenke können bis heute nur bedingt eingesetzt werden, da sich das Hydroxylapatit nicht auf diesen Werkstoff aufspritzen läßt. Darum wurde mit dem HD-HVOF-Verfahren eine mit diesem Grundwerkstoff und dem menschlichen Körper verträgliche Zwischenschicht und anschließend die biostabile Schichtbeispielsweise Hydroxylapatit aufgespritzt. Die Zwischenschicht einer Schichtdicke von 50 µm bestand aus pulverförmigem PPS und Al-Oxid im Mischungsverhältnis 10 bis 40 Anteile Al-Oxid, Rest PPS.Carbon-fiber-reinforced implants for knee or hip joints can only be used to a limited extent to date, since the hydroxyapatite can not be sprayed onto this material. Therefore, with the HD-HVOF method, an intermediate layer compatible with this base material and the human body and then the biostable layer, for example hydroxylapatite, was sprayed on. The intermediate layer with a layer thickness of 50 μm consisted of powdered PPS and Al oxide in a mixing ratio of 10 to 40 parts Al oxide, balance PPS.

Diese Lösung ergab eine implantierbare Prothese, die sehr leicht und gut verträglich ist. Auch die Entstehungskosten können gegenüber einer Titanlegierung als Grundwerkstoff enthaltenden Prothesen niedriger gehalten werden.This solution yielded an implantable prosthesis that is very light and well tolerated. Also, the development costs can be kept lower compared to a titanium alloy containing as a base material prostheses.

BEISPIEL 11:EXAMPLE 11

Bei Walzengleitlagern sollte das bis jetzt verwendete Weißmetall gegen einen besseren Gleitlagerwerkstoff ersetzt werden. Die Beschichtung nach dem RD-HVOF-Verfahren geschah mit einer Zwischenschicht und einer Deckschicht aus pulverförmigen Werkstoffen der folgenden Zusammensetzung:

  • Zwischenschicht einer Schichtdicke von 50 µm aus einem Gemisch von Polyacryletherketon (PAEK) und Al-Oxid im Verhältnis in bis 30 Ges.-% Al-Oxid, Rest PAEK;
  • Deckschicht bei einer Schichtdicke von 2000 µm aus einem Gemisch von PEEK, Kupfer und Bornitriden in der folgenden Zusammensetzung Cu 30 Gew.-% und Bornitrid (Hexagonal) 4 Gew.-%, Rest PEEK.
For roller bearings, the white metal used so far should be replaced with a better bearing material. The coating according to the RD-HVOF process was carried out with an intermediate layer and a cover layer of powdery materials of the following composition:
  • Intermediate layer of a layer thickness of 50 microns of a mixture of polyacrylic ether ketone (PAEK) and Al oxide in a ratio of up to 30 Ges .-% Al oxide, remainder PAEK;
  • Top layer at a layer thickness of 2000 microns from a mixture of PEEK, copper and boron nitrides in the following composition Cu 30 wt .-% and boron nitride (hexagonal) 4 wt .-%, balance PEEK.

Die so hergestellten Gleitlager zeigten sehr gutes Gleitverhalten und eine wesentlich höhere Standzeit als bislang bekannte Gleitlager.The plain bearings thus produced showed very good sliding behavior and a much longer service life than previously known plain bearings.

BEISPIEL 12:EXAMPLE 12

Ein Reaktorbehälter für die chemische Industrie sollte zur Steuerung der darin durchzuführenden Reaktionen mit einer korrosionsfesten und magnetischen Schutzschicht versehen werden. Die Beschichtung sollte mit dem HD-HVOF-Verfahren erfolgen und die aufgebrachte Schicht eine Schichtdicke von 700 µm aufweisen.A reactor vessel for the chemical industry should be provided with a corrosion-resistant and magnetic protective layer to control the reactions to be carried out therein. The coating should be done with the HD-HVOF method and the applied layer has a layer thickness of 700 microns.

Als pulverförmiger Werkstoff wurde ein Gemisch aus PEEK, Si-Oxid, Al-Oxid und nanokristallinem Ferrit verwendet. Die Zusammensetzung lag bei Si-Oxid 5 bis 20 Gew.-%, Al-Oxid 10 bis 20 Gew.-% und Rest PEEK. Durch die Ferritkorngröße wurde der Curiepunkt der Beschichtung auf 280°C eingestellt. Die Kornverteilung betrug 1 bis 40 µm.The powdery material used was a mixture of PEEK, Si oxide, Al oxide and nanocrystalline ferrite. The composition was Si-oxide 5 to 20 wt .-%, Al oxide 10 to 20 wt .-% and balance PEEK. Due to the ferrite grain size, the Curie point of the coating was set at 280 ° C. The grain distribution was 1 to 40 microns.

Nach dem Aufspritzen wurde die Schicht mittels Induktion nachgesintert.After spraying, the layer was re-sintered by induction.

Die nachfolgend in diesem Reaktor durchgeführten Reaktionen waren sehr erfolgversprechend.The reactions carried out subsequently in this reactor were very promising.

BEISPIEL 13:EXAMPLE 13

Auf einem aus Holz hergestellten Klettergarten für einen Spielplatz sollte eine verwitterungsfeste Schutzschicht einer Schichtdicke von 200 µm mit dem HD-HVOF-Verfahren aufgebracht werden.A weatherproof protective layer of a layer thickness of 200 μm was to be applied on a wooden crag for a playground using the HD-HVOF process.

Als pulverförmiger Werkstoff wurde ein Gemisch verwendet aus

  • Al2O3-TiO2 87/13 = 20 Gew.%;
  • Graphitpulver = 5 Gew.-%;
  • Polyamid = Rest.
As a powdery material, a mixture was used
  • Al 2 O 3 -TiO 2 87/13 = 20% by weight;
  • Graphite powder = 5% by weight;
  • Polyamide = remainder.

Die so hergestellte Schutzschicht hatte eine ausgezeichnete Witterungsbeständigkeit und zeigte zudem eine schöne schwarze Farbe.The protective layer thus prepared had excellent weather resistance and also showed a nice black color.

Claims (13)

  1. Method for plastic coating by means of a spraying procedure, characterized in that
    a layer of metal, non-metal or oxide materials is applied to a plastic element or a base material, or that as layer plastic is applied to, whereby the polymer powder shaped plastics are adjusted through nano-crystalline additives preferably to the features of the base material, whereby each of the applying of the layer is made by a high-pressure spraying procedure under addition of the powder shaped material by a gas-controlled powder feeder unit, with which a volume of the powder shaped material is forwarded by sucking and after by overpressure.
  2. Method according to claim 1, characterized by a high-speed flame gunning proceeding.
  3. Method according to claim 1 or 2, characterized by a high-speed cold gunning proceeding.
  4. Method according to anyone of the claims 1 or 3, characterized by a spray material within a grain size range between 0,1 and 150 µm, especially 0,5 until 75 µm.
  5. Method according to claim 4, characterized by a grain size range between 0,1 and 30 µm.
  6. Method according to anyone of the claims 1 or 5, characterized in that as spray material is used nano-crystalline powder.
  7. Method according to anyone of the claims 1 or 6, characterized in that the layer is applied to a fibre-reinforced material.
  8. Method according to claim 7, characterized by carbon or glass-fibres as the material reinforcing fibres.
  9. Method according to anyone of the claims 1 or 6, characterized in that the layer is applied on plastic, a high temperature resistant plastic, on polyurethane, high performance thermoplastic and/or curable plastics.
  10. Method according to claim 9, characterized in that the layer is applied on polyetheretherketone (PEEK), Polyacryletherketone (PAEK), their pre-stages, polyphenylensulphyte (PPS), liquid crystalline polymer (LCP), entfunctional oligomer or polyamide.
  11. Method according to anyone of the claims 1 or 10, characterized in that the plastic is applied to as base material or base layer to a metal or as cover layer.
  12. Method according to anyone of the claims 9 or 11, characterized by a layer of a mixture of the materials, which is built graduated.
  13. Use of a layer for the production of a biologic active layer, which is applied on plastic material by a high-speed spray procedure according to anyone of the claims 1 to 12.
EP00993329A 1999-12-09 2000-12-11 Method for providing a plastic coating by means of spraying, device used for said method and use of the layer thereby produced Expired - Lifetime EP1237662B1 (en)

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DE19959515A DE19959515A1 (en) 1999-12-09 1999-12-09 Process for plastic coating by means of a spraying process, a device therefor and the use of the layer
PCT/EP2000/012480 WO2001042525A2 (en) 1999-12-09 2000-12-11 Method for providing a plastic coating by means of spraying, device used for said method and use of the layer thereby produced

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AU2841201A (en) 2001-06-18
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WO2001042525A3 (en) 2002-02-14
WO2001042525A2 (en) 2001-06-14

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