WO2002081188A1 - Multi-layer fluid conduit for the sanitary and heating sectors - Google Patents

Multi-layer fluid conduit for the sanitary and heating sectors Download PDF

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Publication number
WO2002081188A1
WO2002081188A1 PCT/EP2001/012784 EP0112784W WO02081188A1 WO 2002081188 A1 WO2002081188 A1 WO 2002081188A1 EP 0112784 W EP0112784 W EP 0112784W WO 02081188 A1 WO02081188 A1 WO 02081188A1
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WIPO (PCT)
Prior art keywords
fluid line
pvdf
polyethylene
inner layer
sanitary
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PCT/EP2001/012784
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German (de)
French (fr)
Inventor
Peter Weber
Original Assignee
Geberit Technik Ag
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Publication of WO2002081188A1 publication Critical patent/WO2002081188A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered 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
    • B32B15/08—Layered 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered 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
    • B32B15/08—Layered 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
    • B32B15/082—Layered 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered 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
    • B32B15/08—Layered 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
    • B32B15/085—Layered 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/308—Heat stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2327/00—Polyvinylhalogenides
    • B32B2327/12—Polyvinylhalogenides containing fluorine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

Definitions

  • the present invention relates to a multilayer fluid line and a fluid line system for the sanitary and heating sector.
  • DE 42 38 696 a two-layer fluid line for liquid fuels, the outer layer comprising a thermoplastic material and preferably additionally containing a radiation-crosslinkable plastic.
  • the thermoplastic material of the outer layer can be an elastomer, in particular a polyamide elastomer, a polyester elastomer or a polyolefin elastomer.
  • the inner layer preferably contains ETFE or PVDF.
  • DE 41 32 984 deals with plastic tubes for the guidance of gaseous media and fluids, such as drinking water or waste water.
  • the pipes proposed by DE 41 32 984 consist of a core pipe made of polyethylene, on which a jacket made of polyvinylidene fluoride is arranged.
  • a protective layer made of polyethylene is used to protect the thin jacket made of PVDF.
  • the core tube can have additional protection in the form of an aluminum jacket.
  • DE 197 07 827 discloses a composite pipe which contains an inner layer made of cross-linked polyethylene, an intermediate layer made of aluminum and an outer layer made of polyethylene.
  • PE polyethylene
  • ETFE ethylene-tetrafluoroethylene copolymer
  • PVDF polyvinylidene fluoride
  • PVC polyvinyl chloride
  • PEX cross-linked polyethylene
  • the fluid line according to the invention comprises at least an inner layer, an intermediate layer and an outer layer, the inner layer consisting of a fluoropolymer or a subsequently fluorinated polymer, the intermediate layer consisting of a metal and the outer layer consisting of a thermoplastic.
  • Such a fluid line has a very favorable combination of properties: the inner layer made of a fluoropolymer or a subsequently fluorinated polymer has a very high chemical resistance, the intermediate layer formed from a metal gives shape stability and represents an effective diffusion barrier and the outer layer from one Thermoplastic acts as a protective layer against damage and at the same time prevents the ingress of contaminants.
  • the inner layer of the fluid line consists of a fluoropolymer, namely of a PVDF material.
  • the plastic PVDF has very good properties with regard to the parameters of pressure resistance, pressure shock resistance, long-term stability, temperature resistance and temperature shock resistance and can also be shaped well.
  • PVDF fulfills all hygienic requirements that are set out in the drinking water ordinance. Fluid lines with an inner layer made of PVDF can therefore be used advantageously for hot and cold water supply. Even very small thicknesses of the PVDF layer cause an absolute diffusion barrier for gases and fluids. The smallest possible thickness of the PVDF layer seems desirable in order to enable the least possible consumption of this cost-intensive material and to keep the weight of the fluid line as low as possible.
  • the inner layer consists of a subsequently fluorinated polymer.
  • a large number of processes for fluorinating polymer materials are known from the prior art, all of which can be used in the context of the present invention.
  • a method for producing plastic profiles with a fluorinated layer according to EP-A-0 267 441 may be mentioned here by way of example. With the aid of this method, subsequent fluorination of the inner layer of the fluid line according to the invention can be carried out without any problems.
  • subsequently fluorinated polymers also excellently fulfill the required properties.
  • subsequently fluorinated polymers have good pressure resistance, pressure shock resistance, long-term stability, temperature resistance and temperature shock resistance and can also be shaped well.
  • fluorinated thermoplastic polymers e.g. Polyethylene, polyvinyl chloride, polyamides, PEX, PVDF, polystyrene, polymethacrylic acid esters, polytetrafluoroethylene, polyvinyl acetate, cellulose acetate or linear polyurethanes.
  • the metallic intermediate layer consists of aluminum or stainless steel.
  • the material aluminum has a high flexural strength, is dimensionally stable, compressible and also represents an effective diffusion barrier. Aluminum therefore fulfills the properties advantageous for fluid lines particularly well.
  • thermoplastic material of the outer layer can e.g. are polyethylene, polyvinyl chloride, polyamides, PEX, PVDF, polystyrene, polymethacrylic acid esters, polytetrafluoroethylene, polyvinyl acetate, cellulose acetate or linear polyurethanes.
  • the outer layer of the fluid line consists of polyethylene or PEX.
  • Polyethylene has a number of advantages such as low weight, very good resistance to aggressive soils and good weldability using all currently known methods. When laying the fluid lines in floors, it is also advantageous that polyethylene is insensitive to frost and resistant to microorganisms and has a high resistance to stress cracking. Polyethylene is also an inexpensive material.
  • the present invention further relates to a fluid line system which comprises at least one of the fluid lines described above and at least one connecting part, wherein at least the inside of the connecting part consists of PVDF.
  • the fluid line system consists exclusively of the fluid lines described above and of connecting parts, the inside of which is made of PVDF.
  • This is a line system for e.g. Drinking water in which all parts in contact with the drinking water are made of PVDF plastic.
  • the fluid line system consists of finally from the fluid lines described above and from connecting parts which are made entirely of PVDF.
  • connecting parts which are made entirely of PVDF.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a fluid conduit for the sanitary and heating sectors. Said conduit comprises an internal layer, an intermediate layer and an external layer, whereby the internal layer consists of a fluoropolymer or a polymer that has been retroactively fluorinated, the intermediate layer consists of a metal and the external layer consists of a thermoplastic.

Description

Mehrschichtige Fluidleitung für den Sanitär- und HeizungsbereichMulti-layer fluid line for the sanitary and heating area
Technisches GebietTechnical field
Die vorliegende Erfindung betrifft eine mehrschichtige Fluidleitung und ein Fluidleitungssystem für den Sanitär- und Heizungsbereich.The present invention relates to a multilayer fluid line and a fluid line system for the sanitary and heating sector.
Stand der TechnikState of the art
Aus dem Stand der Technik sind verschiedene Arten von mehrschichtigen Verbundrohren bekannt, die für eine Vielzahl von Anwendungen wie z.B. zur Leitung von Kraftstoff oder Trinkwasser, eingesetzt werden.Various types of multilayer composite pipes are known from the prior art, which are suitable for a large number of applications, such as to conduct fuel or drinking water.
So offenbart z.B. die DE 42 38 696 eine zweischichtige Fluidleitung für flüssige Kraftstoffe, wobei die äußere Schicht ein thermoplastisches Material aufweist und vorzugsweise zusätzlich einen strahlenvernetzbaren Kunststoff beinhaltet. Das thermoplastische Material der äußeren Schicht kann ein Elastomer sein, insbesondere ein Polyamidelastomer, ein Polyesterelastomer oder ein Polyolefinelastomer. Die innere Schicht enthält vorzugsweise ETFE oder PVDF .For example, DE 42 38 696 a two-layer fluid line for liquid fuels, the outer layer comprising a thermoplastic material and preferably additionally containing a radiation-crosslinkable plastic. The thermoplastic material of the outer layer can be an elastomer, in particular a polyamide elastomer, a polyester elastomer or a polyolefin elastomer. The inner layer preferably contains ETFE or PVDF.
Die DE 41 32 984 beschäftigt sich mit Kunststoffröhren für die Führung von gasförmigen Medien und Fluiden, wie z.B. Trinkwasser oder Abwasser. Die von der DE 41 32 984 vorgeschlagenen Rohre bestehen aus einem Kernrohr aus Polyethylen, auf dem ein Mantel aus Polyvinylidenfluorid angeordnet ist. Zum Schutz des dünnen Mantels aus PVDF wird eine Schutzschicht aus Polyethylen verwendet. Das Kernrohr kann einen zusätzlichen Schutz in Form eines Aluminiummantels aufweisen. Die DE 197 07 827 offenbart ein Verbundrohr, das eine Innenlage aus vernetztem Polyethylen, eine Zwischenlage aus Aluminium und eine Außenlage aus Polyethylen enthält.DE 41 32 984 deals with plastic tubes for the guidance of gaseous media and fluids, such as drinking water or waste water. The pipes proposed by DE 41 32 984 consist of a core pipe made of polyethylene, on which a jacket made of polyvinylidene fluoride is arranged. A protective layer made of polyethylene is used to protect the thin jacket made of PVDF. The core tube can have additional protection in the form of an aluminum jacket. DE 197 07 827 discloses a composite pipe which contains an inner layer made of cross-linked polyethylene, an intermediate layer made of aluminum and an outer layer made of polyethylene.
Trotz dieser Vielzahl von bereits bekannten Verbundrohren treten bei der Leitung von Trinkwasser in Trinkwasserleitungssystemen immer noch technische Probleme auf. So bewirkt z.B. die in den letzten Jahren verstärkte Chlorierung bei der Wasseraufbereitung, bei der bis zu 4 ppm Chlor verwendet werden, eine Abnahme der Stabilisatoren und Rissbildung bei Metallverbundrohren mit PP-, PEX- oder PE-Innenschichten. Solche Rohre weisen daher nur eine begrenzte Beständigkeit bei der Leitung von Trinkwasser auf.Despite this large number of already known composite pipes, technical problems still arise when piping drinking water in drinking water piping systems. For example, the increased chlorination in water treatment in recent years, in which up to 4 ppm chlorine is used, a decrease in stabilizers and crack formation in metal composite pipes with PP, PEX or PE inner layers. Such pipes therefore have only a limited resistance to the supply of drinking water.
Andererseits ist es auch wichtig, dass keinerlei Verunreinigungen in das Trinkwasser aufgenommen werden. Soll die Fluidleitung z.B. in einer kontaminierten Umgebung verlegt werden, so muss gewährleistet sein, dass keine Giftstoffe der Umgebung in das Trinkwasser gelangen.On the other hand, it is also important that no contaminants are absorbed into the drinking water. Should the fluid line e.g. installed in a contaminated environment, it must be ensured that no toxins in the environment get into the drinking water.
Darstellung der ErfindungPresentation of the invention
Aufgabe der vorliegenden Erfindung ist es deshalb, eine Fluidleitung zur Verfügung zu stellen, die neben einer hohen chemischen Beständigkeit, insbesondere gegen chloriertes Wasser, und der notwendigen Formstabilität und Biegefestigkeit auch das Eindiffundieren von Schadstoffen verhindert.It is therefore an object of the present invention to provide a fluid line which, in addition to high chemical resistance, in particular against chlorinated water, and the necessary dimensional stability and flexural strength, also prevents the diffusion of pollutants.
Diese Aufgabe wird erfindungsgemäß durch die Fluidleitung gemäß unabhängigen Patentanspruch 1 und das Fluidleitungssystem gemäß unabhängigen Patentanspruch 8 gelöst. Weitere Details, Aspekte und bevorzugte Ausführungsformen der vorliegenden Erfindung ergeben sich aus der Beschreibung und den abhängigen Ansprüchen. Im Rahmen der vorliegenden Erfindung werden die folgenden Abkürzungen verwendet :This object is achieved by the fluid line according to independent claim 1 and the fluid line system according to independent claim 8. Further details, aspects and preferred embodiments of the present invention result from the description and the dependent claims. The following abbreviations are used in the context of the present invention:
PP: PolypropylenPP: polypropylene
PE: PolyethylenPE: polyethylene
ETFE : Ethylen-Tetrafluorethylen-CopolymerETFE: ethylene-tetrafluoroethylene copolymer
PVDF : PolyvinylidenfluoridPVDF: polyvinylidene fluoride
PVC: PolyvinylchloridPVC: polyvinyl chloride
PEX: vernetztes PolyethylenPEX: cross-linked polyethylene
Die erfindungsgemäße Fluidleitung umfasst zumindest eine innere Schicht, eine Zwischenschicht und eine äußere Schicht, wobei die innere Schicht aus einem Fluorpolymer oder einem nachträglich fluoriertem Polymer, die Zwischenschicht aus einem Metall und die äußere Schicht aus einem Thermoplast besteht.The fluid line according to the invention comprises at least an inner layer, an intermediate layer and an outer layer, the inner layer consisting of a fluoropolymer or a subsequently fluorinated polymer, the intermediate layer consisting of a metal and the outer layer consisting of a thermoplastic.
Eine derartige Fluidleitung weist eine sehr günstige Kombination von Eigenschaften auf: Die innere Schicht aus einem Fluorpolymer oder einem nachträglich fluoriertem Polymer besitzt eine sehr hohe chemische Beständigkeit, die aus einem Metall gebildete Zwischenschicht verleiht Formstabilität und stellt eine wirkungsvolle Diffusionsbarriere dar und die äußere Schicht aus einem Thermoplast wirkt als Schutzschicht gegen Beschädigungen und verhindert gleichzeitig das Eindringen von Verunreinigungen.Such a fluid line has a very favorable combination of properties: the inner layer made of a fluoropolymer or a subsequently fluorinated polymer has a very high chemical resistance, the intermediate layer formed from a metal gives shape stability and represents an effective diffusion barrier and the outer layer from one Thermoplastic acts as a protective layer against damage and at the same time prevents the ingress of contaminants.
Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung besteht die innere Schicht der Fluidleitung aus einem Fluorpolymer, nämlich aus einem PVDF-Material . Neben einer sehr guten chemischen Beständigkeit weist der Kunststoff PVDF sehr gute Eigenschaften hinsichtlich der Parameter Druckbeständigkeit, Druckwechselbeständigkeit, Langzeitstabilität, Temperaturbeständigkeit sowie Temperaturwechselbeständigkeit auf und lässt sich darüber hinaus auch gut formen. Zudem erfüllt PVDF alle hygienischen Anforderungen, die im Rahmen der Trinkwasserverordnung gestellt werden. Fluidleitungen mit einer inneren Schicht aus PVDF sind daher in vorteilhafter Weise für die Warm- und Kaltwasser-Versorgung einsetzbar. Bereits sehr geringe Dicken der PVDF-Schicht bewirken eine absolute Diffusionssperre für Gase und Fluide. Eine möglichst geringe Dicke der PVDF-Schicht erscheint erstrebenswert, um einen möglichst geringen Verbrauch dieses kostenintensiven Materials zu ermöglichen und um das Gewicht der Fluidleitung so niedrig wie möglich zu halten.According to a preferred embodiment of the present invention, the inner layer of the fluid line consists of a fluoropolymer, namely of a PVDF material. In addition to very good chemical resistance, the plastic PVDF has very good properties with regard to the parameters of pressure resistance, pressure shock resistance, long-term stability, temperature resistance and temperature shock resistance and can also be shaped well. In addition, PVDF fulfills all hygienic requirements that are set out in the drinking water ordinance. Fluid lines with an inner layer made of PVDF can therefore be used advantageously for hot and cold water supply. Even very small thicknesses of the PVDF layer cause an absolute diffusion barrier for gases and fluids. The smallest possible thickness of the PVDF layer seems desirable in order to enable the least possible consumption of this cost-intensive material and to keep the weight of the fluid line as low as possible.
Gemäß einer weiteren bevorzugten Ausführungsform besteht die innere Schicht aus einem nachträglich fluoriertem Polymer. Aus dem Stand der Technik sind eine Vielzahl von Verfahren zur Fluorierung von Polymermaterialien bekannt, die alle im Rahmen der vorliegenden Erfindung Verwendung finden können. Beispielhaft sei an dieser Stelle ein Verfahren zur Herstellung von Kunst- stoffprofilen mit einer fluorierten Schicht gemäß EP-A-0 267 441 genannt. Mit Hilfe dieses Verfahrens kann eine nachträgliche Fluorierung der inneren Schicht der erfindungsgemäßen Fluid-Leitung problemlos durchgeführt werden.According to a further preferred embodiment, the inner layer consists of a subsequently fluorinated polymer. A large number of processes for fluorinating polymer materials are known from the prior art, all of which can be used in the context of the present invention. A method for producing plastic profiles with a fluorinated layer according to EP-A-0 267 441 may be mentioned here by way of example. With the aid of this method, subsequent fluorination of the inner layer of the fluid line according to the invention can be carried out without any problems.
Auch solche nachträglich fluorierten Polymere erfüllen in hervorragender Weise die geforderten Eigenschaften. Neben der guten chemischen Beständigkeit weisen nachträglich fluorierte Polymere gute Druckbeständigkeit, Druckwechselbeständigkeit, Langzeitstabilität, Temperaturbeständigkeit und Temperaturwechselbeständigkeit auf und lassen sich ebenfalls gut formen.Such subsequently fluorinated polymers also excellently fulfill the required properties. In addition to the good chemical resistance, subsequently fluorinated polymers have good pressure resistance, pressure shock resistance, long-term stability, temperature resistance and temperature shock resistance and can also be shaped well.
Ganz besonders bevorzugt werden im Rahmen der vorliegenden Erfindung nachträglich fluorierte thermoplastische Polymere, also z.B. Polyethylen, Polyvinylchlorid, Polyamide, PEX, PVDF, Polystyrol, Polymethacrylsäureester, Polytetrafluorethylen, Po- lyvinylacetat, Celluloseacetat oder lineare Polyurethane.In the context of the present invention, fluorinated thermoplastic polymers, e.g. Polyethylene, polyvinyl chloride, polyamides, PEX, PVDF, polystyrene, polymethacrylic acid esters, polytetrafluoroethylene, polyvinyl acetate, cellulose acetate or linear polyurethanes.
Ganz ausgezeichnete Eigenschaften hinsichtlich Druckbeständigkeit, Druckwechselbeständigkeit, Langzeitstabilität, Tempera- turbeständigkeit, Temperaturwechselbeständigkeit und Formbarkeit weist nachträglich fluoriertes Polyethylen auf, das aus diesem Grund im Rahmen der vorliegenden Erfindung ganz besonders bevorzugt wird.Excellent properties with regard to pressure resistance, pressure shock resistance, long-term stability, temperature Resistance to turbidity, resistance to temperature fluctuations and formability is subsequently exhibited by fluorinated polyethylene, which for this reason is particularly preferred in the context of the present invention.
Die metallische Zwischenschicht besteht gemäß einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung aus Aluminium oder rostfreiem Stahl. Der Werkstoff Aluminium weist eine hohe Biegefestigkeit auf, ist formstabil, verpressbar und stellt zudem eine wirkungsvolle Diffusionssperre dar. Somit erfüllt Aluminium die für Fluidleitungen vorteilhaften Eigenschaften besonders gut .According to a further preferred embodiment of the present invention, the metallic intermediate layer consists of aluminum or stainless steel. The material aluminum has a high flexural strength, is dimensionally stable, compressible and also represents an effective diffusion barrier. Aluminum therefore fulfills the properties advantageous for fluid lines particularly well.
Bei dem thermoplastischen Material der äußeren Schicht kann es sich z.B. um Polyethylen, Polyvinylchlorid, Polyamide, PEX, PVDF, Polystyrol, Polymethacrylsäureester, Polytetrafluorethy- len, Polyvinylacetat, Celluloseacetat oder um lineare Polyurethane handeln.The thermoplastic material of the outer layer can e.g. are polyethylene, polyvinyl chloride, polyamides, PEX, PVDF, polystyrene, polymethacrylic acid esters, polytetrafluoroethylene, polyvinyl acetate, cellulose acetate or linear polyurethanes.
Gemäß einer besonders bevorzugten Ausführungsform der vorliegenden Erfindung besteht die äußere Schicht der Fluidleitung aus Polyethylen oder PEX. Der Werkstoff Polyethylen weist eine Vielzahl von Vorteilen auf wie z.B. ein niedriges Gewicht, eine sehr gute Beständigkeit gegen aggressive Böden sowie eine gute Schweißbarkeit nach allen derzeit bekannten Verfahren. Bei der Verlegung der Fluidleitungen in Böden ist weiterhin von Vorteil, dass Polyethylen unempfindlich gegen Frost und beständig gegen Mikroorganismen ist sowie eine hohe Spannungsrissbeständigkeit aufweist. Zudem ist Polyethylen ein kostengünstiger Werkstoff.According to a particularly preferred embodiment of the present invention, the outer layer of the fluid line consists of polyethylene or PEX. Polyethylene has a number of advantages such as low weight, very good resistance to aggressive soils and good weldability using all currently known methods. When laying the fluid lines in floors, it is also advantageous that polyethylene is insensitive to frost and resistant to microorganisms and has a high resistance to stress cracking. Polyethylene is also an inexpensive material.
Gemäß der hier beschriebenen bevorzugten Ausführungsform steht neben der guten Schweißbarkeit von Polyethylen vor allem die Funktion als Schutzschicht im Vordergrund, wodurch Beschädigungen der darunterliegenden Schichten verhindert werden, wie sie z.B. beim Verlegen der Fluidleitung vorkommen können. Aus den obigen Ausführungen wird deutlich, dass eine Fluidleitung mit einer inneren Schicht aus einem PVDF-Material, einer Zwischenschicht aus Aluminium oder rostreier Stahl und einer äußeren Schicht aus Polyethylen oder PEX ideale Eigenschaften besitzt. Eine derartige Fluidleitung stellt daher eine ganz besonders bevorzugte Ausführungsform der vorliegenden Erfindung dar.According to the preferred embodiment described here, in addition to the good weldability of polyethylene, the focus is above all on the function as a protective layer, as a result of which damage to the layers below is prevented, as can occur, for example, when the fluid line is laid. From the above, it is clear that a fluid line with an inner layer made of a PVDF material, an intermediate layer made of aluminum or stainless steel and an outer layer made of polyethylene or PEX has ideal properties. Such a fluid line therefore represents a very particularly preferred embodiment of the present invention.
Die vorliegende Erfindung bezieht sich weiterhin auf ein Fluidleitungssystem, das wenigstens eine der oben beschriebenen Fluidleitungen und wenigstens ein Verbindungsteil umfasst, wobei zumindest die Innenseite des Verbindungsteils aus PVDF besteht.The present invention further relates to a fluid line system which comprises at least one of the fluid lines described above and at least one connecting part, wherein at least the inside of the connecting part consists of PVDF.
In einem derartigen Fluidleitungssystem werden die günstigen Eigenschaften <ier oben beschriebenen Fluidleitungen mit den Vorteilen von PVDF-Verbindungsteilen kombiniert. Auch bei PVDF- Verbindungsteilen kommen die bereits geschilderten, äußerst günstigen Eigenschaften des Kunststoffs PVDF zum Tragen. Chemische Beständigkeit, Druckbeständigkeit, Druckwechselbeständigkeit, Langzeitstabilität, Temperaturbeständigkeit sowie Temperaturwechselbeständigkeit und Formbarkeit machen Verbindungsteile mit einer inneren Schicht aus PVDF extrem gut für die Warm- und Kaltwasser-Versorgung geeignet.In such a fluid line system, the favorable properties <be it i above described fluid lines with the advantages of PVDF connection parts combined. The already described, extremely favorable properties of the plastic PVDF also come into play in the case of PVDF connecting parts. Chemical resistance, pressure resistance, resistance to pressure changes, long-term stability, temperature resistance as well as resistance to temperature changes and formability make connecting parts with an inner layer of PVDF extremely well suited for hot and cold water supply.
Gemäß einer besonders bevorzugten Ausführungsform der vorliegenden Erfindung besteht das Fluidleitungssystem ausschließlich aus den oben beschriebenen Fluidleitungen sowie aus Verbindungsteilen, deren Innenseite aus PVDF besteht. Damit liegt ein Leitungssystem für z.B. Trinkwasser vor, bei dem durchgängig sämtliche mit dem Trinkwasser in Kontakt stehenden Teile aus dem Kunststoff PVDF gefertigt sind.According to a particularly preferred embodiment of the present invention, the fluid line system consists exclusively of the fluid lines described above and of connecting parts, the inside of which is made of PVDF. This is a line system for e.g. Drinking water in which all parts in contact with the drinking water are made of PVDF plastic.
Gemäß einer weiteren besonders bevorzugten Ausführungsform der vorliegenden Erfindung besteht das Fluidleitungssystem aus- schließlich aus den oben beschriebenen Fluidleitungen sowie aus Verbindungsteilen, die vollständig aus PVDF gefertigt sind. Zusätzlich zu den bereits geschilderten Vorteilen kommt in diesem Fall die einfache und kostengünstige Herstellung der PVDF- Verbindungsteile als vorteilhafte Eigenschaft hinzu. According to a further particularly preferred embodiment of the present invention, the fluid line system consists of finally from the fluid lines described above and from connecting parts which are made entirely of PVDF. In addition to the advantages already described, the simple and inexpensive manufacture of the PVDF connecting parts is an additional advantageous feature in this case.

Claims

Patentansprüche claims
1. Fluidleitung für den Sanitär- und Heizungsbereich mit einer inneren Schicht, einer Zwischenschicht und einer äußeren Schicht, dadurch gekennzeichnet, dass die innere Schicht aus einem Fluorpolymer oder einem nachträglich fluoriertem Polymer, die Zwischenschicht aus Metall und die äußere Schicht aus einem Thermoplast besteht.1. Fluid line for the sanitary and heating sector with an inner layer, an intermediate layer and an outer layer, characterized in that the inner layer consists of a fluoropolymer or a subsequently fluorinated polymer, the intermediate layer consists of metal and the outer layer consists of a thermoplastic.
2. Fluidleitung nach Anspruch 1, dadurch gekennzeichnet, dass die innere Schicht aus einem PVDF-Material besteht.2. Fluid line according to claim 1, characterized in that the inner layer consists of a PVDF material.
3. Fluidleitung nach Anspruch 1, dadurch gekennzeichnet, dass die innere Schicht aus einem nachträglich fluoriertem thermoplastischen Polymer besteht.3. Fluid line according to claim 1, characterized in that the inner layer consists of a subsequently fluorinated thermoplastic polymer.
4. Fluidleitung nach Anspruch 3, dadurch gekennzeichnet, dass die innere Schicht aus nachträglich fluoriertem thermoplastischen Polyethylen besteht.4. Fluid line according to claim 3, characterized in that the inner layer consists of subsequently fluorinated thermoplastic polyethylene.
5. Fluidleitung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zwischenschicht aus Aluminium oder rostfreiem Stahl besteht.5. Fluid line according to one of the preceding claims, characterized in that the intermediate layer consists of aluminum or stainless steel.
6. Fluidleitung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die äußere Schicht aus Polyethylen oder PEX besteht.6. Fluid line according to one of the preceding claims, characterized in that the outer layer consists of polyethylene or PEX.
7. Fluidleitung nach Anspruch 1, dadurch gekennzeichnet, dass die innere Schicht aus einem PVDF-Material, die Zwischenschicht aus Aluminium und die äußere Schicht aus Polyethylen besteht.7. Fluid line according to claim 1, characterized in that the inner layer is made of a PVDF material, the intermediate layer is made of aluminum and the outer layer is made of polyethylene.
8. Fluidleitungssystem für den Sanitär- und Heizungsbereich umfassend wenigstens eine Fluidleitung wie in den Ansprüchen 1 bis 7 definiert und wenigstens ein Verbindungsteil, wobei zumindest die Innenseite des Verbindungsteils aus PVDF besteht.8. Fluid line system for the sanitary and heating area comprising at least one fluid line as defined in claims 1 to 7 and at least one connecting part, wherein at least the inside of the connecting part consists of PVDF.
9. Fluidleitungssystem nach Anspruch 8, bestehend aus Fluidleitungen wie in den Ansprüchen 1 bis 7 definiert, sowie aus Verbindungsteilen, wobei zumindest die Innenseite der Verbindungsteile aus PVDF besteht.9. Fluid line system according to claim 8, consisting of fluid lines as defined in claims 1 to 7, and of connecting parts, wherein at least the inside of the connecting parts consists of PVDF.
10. Fluidleitungssystem nach Anspruch 9, bestehend aus Fluidleitungen wie in den Ansprüchen 1 bis 6 definiert und PVDF- Verbindungsteilen. 10. Fluid line system according to claim 9, consisting of fluid lines as defined in claims 1 to 6 and PVDF connecting parts.
PCT/EP2001/012784 2001-04-03 2001-11-05 Multi-layer fluid conduit for the sanitary and heating sectors WO2002081188A1 (en)

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