WO2019105822A1 - Composite multicouche et conduite de fluide - Google Patents

Composite multicouche et conduite de fluide Download PDF

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Publication number
WO2019105822A1
WO2019105822A1 PCT/EP2018/082068 EP2018082068W WO2019105822A1 WO 2019105822 A1 WO2019105822 A1 WO 2019105822A1 EP 2018082068 W EP2018082068 W EP 2018082068W WO 2019105822 A1 WO2019105822 A1 WO 2019105822A1
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WO
WIPO (PCT)
Prior art keywords
layer
polyamide
fluid line
wall thickness
composite
Prior art date
Application number
PCT/EP2018/082068
Other languages
German (de)
English (en)
Inventor
Dirk Kramer
Thomas May
Original Assignee
Aft Automotive Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aft Automotive Gmbh filed Critical Aft Automotive Gmbh
Publication of WO2019105822A1 publication Critical patent/WO2019105822A1/fr

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    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered 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
    • B32B27/08—Layered 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 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/10—Polyamides derived from aromatically bound amino and carboxyl groups of amino-carboxylic acids or of polyamines and polycarboxylic acids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/125—Rigid pipes of plastics with or without reinforcement electrically conducting
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    • B32B2250/24—All layers being polymeric
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    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2264/10—Inorganic particles
    • B32B2264/107—Ceramic
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    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
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Definitions

  • the invention relates to a multi-layer composite, in particular for a fluid line, and wei terhin a fluid line of a multi-layer composite.
  • thermoplastic multilayer composite in particular in the form of a multilayer tube, a multilayer tube or a multilayer container, comprising at least one intermediate layer of a molding composition based on ethylene-vinyl alcohol copolymers between rule layers of molding compositions based on polyamide, wherein the intermediate layer over min at least one adhesion-promoting layer of a molding composition based on polyamide, selected from the group copolyamide 6/12, block copolyamide 6/12, polyamide 612, polyamide 610, mixture of polyamide 6 and polyamide 12 with compatibilizer, mixture of polyamide 6 and polyamide 11 with compatibilizer, with at least one secondary layer of a molding compound based on polyamide 12, polyamide 11, polyamide 10/10, polyamide 10/12 or polyamide 12/12 is connected.
  • document WO 2006/040206 A1 shows a multilayer composite comprising the following layers: an inner layer selected from a fluoropolymer molding composition and a polyolefin molding composition; a primer layer having the following composition: a) 0 to 80 parts by weight of a polyamine-polyamide graft copolymer, b) 0 to 100 parts by weight of polyamide, c) 0 to 85 parts by weight of a polymer selected from fluoropolymers and polyolefins, the sum of the Parts by weight of a), b) and c) gives 100, and wherein additionally in the sum of components a) and b) at least 20 parts by weight of mono merstatten consist of caprolactam and / or the combination hexamethylenediamine / adipic acid, hexamethylenediamine / Derived from suberic acid, hexamethylenediamine / sebacic acid, hexamethylenediamine / dodecan
  • document DE 10 2013 013 163 A1 shows a multilayer composite material with barrier properties for volatile organic compounds, which has a first and a second surface and comprises at least one first layer and at least one further layer. It is provided that one of the two layers comprises at least one adsorption material for volatile organic compounds and at least one polymeric carrier material in mixing or in combination with the adsorption material, wherein in the event that the at least one adsorbent material and the at least one polymeric carrier material in Ver composite, the composite material comprises at least three layers, wherein the polymeric carrier material is selected from the group consisting of elastomers, thermoplastics and thermoplastic elastomers and mixtures thereof.
  • document WO 2007/019921 A1 describes a hollow body comprising an inner layer and an outer layer, each made of a thermoplastic material, and two barrier layers, provided between the inner layer and the outer layer.
  • the two barrier layers should be connected directly to each other.
  • the multi-layer composite comprises: a first layer of a fluoropolymer, a second layer of a partially aromatic polyamide immediately following the first layer and a third layer of an ethylene-vinyl alcohol copolymer immediately following the second layer and / or an aliphatic polyamide.
  • the multi-layer composite which is particularly preferably used for producing or Ausbil the fluid line, so far has at least three layers, namely the first layer, the second layer and the third layer.
  • the layers mentioned each directly follow one another, so that therefore the second layer directly adjoins the first layer and the third layer directly adjoins the second layer.
  • the first layer and / or the second layer and / or the third layer are each of a material-uniform design, so that the respective layer consists completely and continuously of the respectively designated material.
  • the first layer consists at least partially, but preferably completely, of the fluorine polymer.
  • the fluoropolymer is meant a fluorinated polymer. It is characterized by a high resistance to chemicals and high temperatures, in other words by a high chemical resistance and / or high temperature resistance.
  • the fluoropolymer can basically be configured as desired. For example, it is in the form of ethylene-tetrafluoroethylene copolymer (ETFE), polytetrafluoroethylene (PTFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP) or polychlorotrifluoroethylene (PCTFE).
  • the second layer consists of the partly aromatic polyamide.
  • This is a partially kris tallines aromatic polyamide to understand, which can also be referred to as polyphthalamide (PPA).
  • PPA polyphthalamide
  • the partially aromatic polyamide may be enhanced speed to improve its mechanical Festig and this have an additive or a fiber reinforcement.
  • ground glass or ground silicon dioxide is used as the starting material.
  • the fiber reinforcement is for example in the form of a glass fiber reinforcement, egg ner carbon fiber reinforcement or an aramid fiber reinforcement before.
  • the second layer or partially aromatic polyamide can also be configured without reinforcement.
  • the third layer consists of either the ethylene-vinyl alcohol copolymer or the aliphatic polyamide.
  • the ethylene-vinyl alcohol copolymer (also abbreviated as EVAF or EVOH) is a copolymer which is formally composed of the monomers ethylene and vinyl alcohol.
  • the ethylene-vinyl alcohol copolymer is a low cost barrier material with good barrier to volatile organic compounds.
  • the aliphatic polyamide has a monomer derived from aliphatic Grundkörpem, for example from a factam, in particular an epsilon-caprolactam, or from hexamethylenediamine and adipic acid.
  • the aliphatic polyamide is, for example, in the form of PA6, PA66 or PA666.
  • the multi-layer composite consists exclusively of the three layers mentioned, so that the first layer and the third layer each act as an outer layer. lie or in the case of the fluid line, the first layer as the inner layer and the third layer is present as an outer layer. In particular, in the latter case, therefore, the first layer is used to guide a fluid in the fluid line, the excellent resistance of the Fluorpoly is used.
  • the multi-layer composite described consisting of the three layers, has excellent strength properties and high durability. However, it may be provided, in addition to the already mentioned three layers at least one additional layer to strike the multi-layer composite.
  • the first layer always represents the outer layer or, in the case of the fluid line, the inner layer.
  • the first layer is always followed by the second layer and the third layer, wherein the second layer directly adjoins the first layer and the third layer directly adjacent to the second layer.
  • An exemplary multi-layer composite of the first layer, the second layer, and the third layer at least having the ethylene-vinyl alcohol copolymer in this case may also be referred to as a three-layer barrier system which is resistant to permeation, oligomer leaching, and water.
  • the multilayer composite preferably serves to produce the fluid line. However, it can also be used to form any other hollow body, such as a fluid container or the like.
  • a further embodiment of the invention provides that the fluoropolymer of the first layer is enriched with carbon in order to improve the electrostatic conductivity of the first layer.
  • the electrostatic conductivity serves to realize a potential equalization. This is particularly important in the case of fluid line, if they are compounds for organic Ver, especially carbon-containing compounds, use. In this case sparking due to too high potential difference should be avoided. This can be achieved in a particularly simple manner by means of a corresponding configuration of the first layer.
  • the fluoropolymer is enriched with carbon, so that the fluoropolymer or the first layer has the desired conductivity.
  • the fluoropolymer should be so enriched with carbon that a professionnwi resistance of at least 10 5 ohms / square, at least 5xl0 6 ohms / square or at least 10 6 ohms / square is present.
  • the partially aromatic polyamide of the second layer is a polyphthalamide with a polyamide as the base polymer.
  • the polyphthalamide is a partially crystalline aromatic polyamide, so far as a semi-aromatic polyamide.
  • the polyphthalamide is characterized by good thermal resistance and low moisture absorption. The chemical resistance and the corrosion resistance are also very good.
  • the polyphthalamide has only a slight swelling tendency, so that only small forces can occur at the layer boundaries of the second layer relative to the materials of the first layer and the third layer.
  • the use of the polyphthalamide has advantages, in particular in the case of the fluid line, because in this case only slight oligomer leaching occurs. Also, the cold impact strength is better than that of other polyamides.
  • the polyphthalamide adheres to a variety of elastomers and thermoplastics without adhesion promoter. This advantage can be further enhanced by suitable modification or addition of the polyphthalamide.
  • the polyphthalamide is enriched with an additive or an additive.
  • the poly phthalamide has a base polymer which is in the form of the polyamide.
  • the polyamide PA10T / X is used as the base polymer. In this case, the polyphthalamide has a particularly good resistance and is also available at low cost.
  • adhesion promoter is to be understood as substances which produce a chemical bond between different materials.
  • Such an adhesion promoter may in principle be provided between the first layer and the second layer and / or between the second layer and the third layer in order to better bond the corresponding materials together.
  • the bonding agent is chosen such that it promotes a chemical bond between the two layers.
  • first layer and the second layer are adhesively bonded together. This may be the case in particular due to the use of the partially aromatic polyamide for the second layer.
  • first layer and the second layer, as well as the second layer and the third layer it is particularly preferable for both the first layer and the second layer, as well as the second layer and the third layer, to be bonded to each other without adhesion. In this case, a particularly cost-effective production of the multi-layer composite is realized.
  • a development of the invention provides that directly on the third layer, a men together with the first layer, the third layer follows between receiving fourth layer of egg nem further polyamide, which is different from the polyamide of the third layer.
  • the fourth layer is provided insofar as it consists of the further polyamide.
  • the fourth layer follows directly on the third layer, so it is directly on this.
  • the third layer is disposed between the first layer and the fourth layer so that the first layer and the fourth layer receive the third layer in common therebetween.
  • the further polyamide is preferably different from the aliphatic polyamide from which the third layer consists or can at least exist.
  • the third layer consists of the ethylene-vinyl alcohol copolymer
  • the further polyamide may in principle be chosen as desired, that is, it may also be present in the form of an aliphatic polyamide. However, it may also be in the form of a partially aromatic polyamide or an aromatic polyamide.
  • Particularly preferred PA6 / 12 or PA12 is used as another polyamide.
  • These polyamides have good mechanical properties, high temperature stability, good mechanical wear resistance and good stress corrosion resistance to chemical thawing agents, in particular ZnCl. They also have a very good adhesion to the materials of the third layer, in particular the aliphatic polyamide.
  • the fourth layer is present, it preferably forms an outer layer of the multilayer composite or of the fluid line.
  • the polyamide of the fourth layer is a polyamide of hexamethylenediamine or a polyamide of laurolactam.
  • the polyamide of hexamethylenediamine PA6 / 12 is given, as an example of the polyamide from Laurinlactam PA 12.
  • a further preferred embodiment of the invention provides that the third layer comprises a first sublayer of the ethylene-vinyl alcohol copolymer and a second sublayer of the aliphatic polyamide, wherein the first sublayer immediately follows the second layer and the second sublayer forms an outer layer or immediately adjacent to the outer layer.
  • the third layer has in this respect both of the aforementioned materials, namely both the ethylene-vinyl alcohol copolymer and the aliphatic polyamide.
  • the third layer has the first partial layer and the second partial layer. The first partial layer is arranged between the second layer and the second partial layer.
  • the second sub-layer either forms the outer layer, namely on the side facing away from the first layer of the multilayer composite, or adjoins directly to the outer layer bil forming layer, for example, the fourth layer.
  • the fourth layer is present, then the second part-layer is arranged between the first part-layer and the fourth layer and lies directly against each of these.
  • the multi-layer composite is five-layered, the first layer, the second layer, the third layer and the fourth layer being present and the third layer being divided into the first partial layer and the second partial layer.
  • the first part layer consists of the ethylene-vinyl alcohol copolymer and the second part of the aliphatic polyamide layer.
  • the aliphatic polyamide can be enriched with an additive or additive and / or a reinforcing agent.
  • a reinforcing agent for example, a fiber reinforcement is used.
  • the fiber reinforcement is, for example, in the form of a glass fiber reinforcement, a carbon fiber reinforcement or an aramid fiber reinforcement.
  • the division of the third layer into the two partial layers has the part before that the amount of the aliphatic polyamide or the layer thickness of the second partial layer can be selected such that the multi-layer composite is overall inexpensive to produce.
  • a preferred embodiment of the invention provides that the fluoropolymer is ethylene-tetrafluoroethylene copolymer, and / or the aliphatic polyamide PA6 or PA666 and / or the further polyamide PA6 / 12 or PA12.
  • the ethylene-tetrafluoroethylene copolymer has good Properties with respect to oligomer leaching and is resistant to abrasion.
  • the material is chemically largely inert to various fluids which can be used in the automotive sector, in particular to organic compounds. It is therefore predestined for education from the outer layer or the inner layer of the fluid line.
  • the permeation properties for volatile organic compounds, especially for oxygen-containing volatile organic compounds (for example, alcohols) and water are very good.
  • the material is easy to process and adhesion-optimized available. If necessary, it can be made electrostatically conductive without changing the properties relevant. Reference has already been made to this.
  • PA6 or PA666 as the aliphatic polyamide has the advantage that these materials are available with a tremendous variety. Numerous modifications regarding stabilization, elasticity, adhesion modification and the like are available. In addition, the material is very inexpensive. In particular, PA6 tends to swell by volatile organic compounds, water and alcohols, or release oligomers. For putting in, it does not have sufficient stress corrosion resistance against some thawing agents. For this Grand, the aliphatic polyamide or the concretely designated materials are preferably not used for the outer layer or inner layer.
  • the polyamides PA6 / 12 or PA 12 have good mechanical properties, a high tempera ture stability, high mechanical wear resistance and a good stress corrosion resistance to chemical thawing agents, in particular ZnCl on.
  • the resistance to fluids used in the automotive industry is very good.
  • Many different materials based on the polyamides are available at a low cost.
  • the polyamides PA6 / 12 and PA12 have very good adhesion to the aliphatic polyamide, in particular PA6.
  • a further, particularly preferred embodiment of the invention provides that the wall thickness of the first layer is less than or equal to the wall thickness of the second layer, and / or the wall thickness of the second layer is less than or equal to the wall thickness of the third layer or the first part layer, and / or the wall thickness of the third layer or the first sub-layer is less than or equal to the wall thickness of the fourth layer.
  • the wall thicknesses of the individual layers starting from the first layer to the third layer, including - if provided - the first sub-layer and the second sub-layer, or the fourth shift steadily increase or at least remain the same, at least not lower.
  • the multi-layer composite can be realized particularly cost-effectively, because, roughly speaking, the material costs per unit weight and / or volume increase from the first layer to the third or fourth layer.
  • the required properties of the multi-layer composite in terms of its strength or stiffness speed is achieved by the use of multiple layers, even with low wall thicknesses relationship as layer thicknesses readily.
  • the wall thickness of the first layer is at least 0.1 mm and at most 0.2 mm
  • / or the second layer is at least 0.1 mm and at most 0.3 mm
  • / or the third layer or the first part-layer is at least 0.15 mm and at most 0.4 mm
  • / or the fourth layer is at least 0.2 mm and at most 0.4 mm. It is particularly preferred that the wall thicknesses of the layers increase steadily from layer to layer starting from the first layer. With the wall thicknesses mentioned above, the advantageous properties described above can be achieved at the same time as low costs of the multilayer composite.
  • the wall thickness of the first layer is at most 0.12 mm, the second layer at least 0.12 mm and at most 0.15 mm, the third layer or the first partial layer at least 0.15 mm and at most 0.2 mm and the fourth layer at least 0.25 mm and at most 0.3 mm.
  • the second sublayer of the third layer may have a wall thickness as desired. For example, it is only from the desired total wall thickness of the multi-layer composite minus the wall thicknesses of the other layers ermit mined.
  • the second sub-layer represents insofar a filling layer.
  • the invention further relates to a fluid conduit made of a multilayer composite, in particular of a multilayer composite according to the statements in this description, having a first layer of a fluoropolymer, a second layer of a partially aromatic polyamide immediately following the first layer and directly onto the second layer the following third layer of an ethylene-vinyl alcohol copolymer and / or an aliphatic polyamide.
  • a fluid conduit made of a multilayer composite, in particular of a multilayer composite according to the statements in this description, having a first layer of a fluoropolymer, a second layer of a partially aromatic polyamide immediately following the first layer and directly onto the second layer the following third layer of an ethylene-vinyl alcohol copolymer and / or an aliphatic polyamide.
  • a further embodiment of the invention provides that the first layer is a Fluidströ tion space limiting inner layer of the fluid line.
  • the fluoropolymer is particularly resistant to numerous chemicals which are used, for example, in the automotive sector. For this reason, the first layer should immediately limit the fluid flow space. For this purpose, it is present as the inner layer of the fluid line.
  • a fluid corrugated tube is a tube made of a material having a certain strength, which has a height with a certain configuration, namely a corrugation, a higher flexibility than a configuration with an unwashed shape.
  • the corrugation is formed by a wave-shaped diameter changing in the direction of a longitudinal center axis of the fluid line. This has the advantage that a particularly good flexibility of the fluid line is realized.
  • a preferred further embodiment of the invention provides that the inner layer and / or an outer layer of the layers has at least one coating, in particular special flame and / or scuff protection coating and / or an insulation coating.
  • the coating is a component of the respective layer.
  • the coating can be applied to the respective layer.
  • the coating can be delimited from the layers by a much smaller wall thickness.
  • the wall thickness of each of the layers is at least 0.1 mm, whereas the wall thickness of the Beschich device is less than 0.1 mm, in particular at most 0.05 mm or at most 0.01 mm.
  • the coating can have any functionality. For example, it serves as a flame retardant coating, thus providing a thermal barrier to thermal Einflüs sen. Additionally or alternatively, it can be configured as a scuff protection coating, wel che offers protection against mechanical influences. Also, the coating may be configured as an insulation coating which is electrically insulated, that is, has at least a higher electrical resistance than the fluid line or the multilayer composite itself. Finally, a further embodiment of the invention can provide that the outer layer is formed by the third layer, the second partial layer of the third layer or the fourth layer. The outer layer bounds the fluid line on the outside, ie on its side facing away from the fluid flow space. The outer layer may be formed by any of the layers, for example, the third layer or the fourth layer. If the third layer consists of the plurality of partial layers, the outer layer is usually formed by the second partial layer of the third layer.
  • Figure is a schematic sectional view through a fluid line of a multilayer composite.
  • the multi-layer composite 2 comprises a first layer 5, a second layer 6, a third layer 7 and a fourth layer 8, which follow one another in the radial direction as seen from the outside.
  • Each of the layers 5, 6, 7 and 8 is designed to be continuous in order circumferential direction and preferably has a constant wall thickness in the circumferential direction.
  • the third layer 7 is composed of a first partial layer 9 and a second partial layer 10.
  • the two sub-layers 9 and 10 are formed continuously in the circumferential direction, so encompass the catch center axis 4 in the circumferential direction completely. Also wei sen the sub-layers 9 and 10 in the circumferential direction on a constant wall thickness. Individual layers 5, 6, 7 and 8 and / or partial layers 9 and 10 can be dispensed with. Thus, not necessarily all of the layers shown here must be realized.
  • the first layer 5 consists of a fluoropolymer, the second layer 6 of a partly aromatic polyamide, the first sublayer 9 of an ethylene-vinyl alcohol copolymer, the second sublayer 10 of an aliphatic polyamide and the fourth layer 8 another polyamide, which of the polyamide of the second Partial layer 10 is preferably different.
  • the fluoropolymer of the first layer is an ethylene-tetrafluoroethylene copolymer
  • the second-layer partially aromatic polyamide is a polyphthalamide
  • the aliphatic polyamide of the second sub-layer 10 is PA6 or PA666, and the other polyamide is the fourth layer 8 PA612 or PA12.
  • the wall thicknesses of the layers 5, 6, 7 and 8 shown here as well as of the partial layers 9 and 10 can be identical.
  • the wall thickness of the layers 5, 6, 7 and 8 and the sub-layers 9 and 10 increases in the radial outward direction, starting from the first layer 5 at least for some of the successive layers.
  • the fluid line 1 is preferably used in the automotive sector, for example as a fuel-carrying fluid line 1, which may also be referred to as a fuel line.
  • a fuel-carrying fluid line 1 which may also be referred to as a fuel line.
  • the requirements for such a fuel line have increased steadily in recent years as a direct and in direct consequence of growing safety and environmental requirements. Added to this are increased expectations of product quality. At the same time, however, economic requirements in manufacturing must be met to an ever greater extent.
  • Fuel lines made of metallic materials have already been displaced almost exclusively by fuel lines made of elastomers or plastic tubes, at least in the low-pressure circuit today.
  • Reasons for this include, inter alia, better behavior against internal and / or external corrosion, better resistance to vibration, better Pulsationsdämp tion properties, better processing properties, lower component weight and low re cost.
  • For economic reasons, but also for the reasons of a low-permissible connec tion technology increasingly metallic fuel pipes, which are still encountered in engine space applications, replaced by plastic pipes. It should be noted that it is due to the fire behavior and the ability to form ignitable mixtures of winningmedi ums in components of the fuel cycle to safety-related components.
  • Lei lines in the field of tank filling and in the field of tank ventilation and the Aktivkoh leregeneration belongs to fuel systems on today's motor vehicles. For these lines usually the same requirements apply. At the fuel lines, however, a variety of other requirements are made, of which only an incomplete selection should be mentioned in extracts. For example, a high internal pressure resistance, high cold flexibility and high temperature resistance, high impact strength, high vibration resistance, high elasticity, high dimensional stability, buckling strength, time Liche flame resistance, electrostatic dissipation and so on must be realized. It goes without saying that the properties must be maintained over the entire life of the vehicle, despite internal and external chemical consumption and thermal stress (including hydrolysis and stress cracking resistance).
  • multilayer pipes are usually verwen det, in which a plurality of functional materials are arranged in certain layer arrangements with bestimm th layer thicknesses. These pipes can be produced, for example, by coextrusion or by jacketing processes.
  • Each layer in the composite makes a defined contribution to the fulfillment of the requirements of the overall pipe and thereby brings positive properties to a single function.
  • the layers in such multi-layer structures may be inner layers, barrier layers, solution inhibitor layers, protective layers, adhesion promoter layers, support layers, filler layers, outer layers, insulating layers, marking layers or wear protection layers.
  • the layers are made in the interest of ease of manufacture and further processing of thermoplastically ver workable materials.
  • the above-described fluid line 1 from the multi-layer composite 2 meets the requirements ments to a particular extent.
  • the permeation requirements become associated met with high temperature requirements.
  • the fluid line 1 has, for example, the dimensions NEN 10x1.6 mm to 10x2 mm, preferably 10x1.8 mm, wherein the first number describes the outer or inner diameter and the second number describes the wall thickness.
  • other dimensions of the fluid line 1 are of course feasible.
  • An example of concrete materials of layers 5, 6, 7, 8, 9 and 10 has already been reproduced.
  • PA666 instead of the PA6 in this example as the aliphatic polyamide of the third layer.
  • the further polyamide could be the fourth layer PA612 or alternatively native PA12.
  • the third layer 7 consists entirely of the aliphatic polyamide.
  • there would be a four-layer fluid line which consists of the following materials from the inside out: the fluoropolymer, the partly aromatic polyamide, the aliphatic polyamide and the other polyamide.
  • the fourth layer could be dispensed with, so that the outer layer consists of the aliphatic polyamide and insofar as the third layer represents the outer layer.
  • a three-layer fluid line is realized, which consists of the following materials from the inside out: the fluoropolymer, the partially aromatic polyamide and the aliphatic polyamide.
  • the fluid line 1 described has the same advantage as the multi-layer composite 2, of which the fluid line 1 consists of a high resistance with a simultaneous very good availability of materials.
  • the structure of the multi-layer composite 1 allows cost-effective production.
  • the fluid line 1 is very easy to process, for example, by low-permeability and secure connection technologies such as welding, especially laser welding.
  • the welding can be carried out preferably by a targeted and locally limited and in intensity and time on the materials and geometries tuned penetration of a laser beam through the device to be welded to the fluid line 1, which is made completely or locally made of laser-transparent material.
  • the device is for example in the form of a fluid coupling.
  • the material of the outer layer of the fluid conduit for example, the third layer, the second sub-layer or the fourth layer, must be laserabsorb Schlifd in neces sary extent in this case.
  • the material of the respective layer is already suitably selected or made sufficiently laser-absorbent by means of an additive.
  • the Matieral should also have the property of a color change in common laser marking process. If printing is to be used for labeling, suitable pigment-rich inks are to be preferred.
  • the materials and / or the wall thicknesses of the individual layers are chosen in particular such that the fluid line 1 without the use of arranged inside the tube bending auxiliary tools, such as springs, are also thermoformed in tight bending radii Kings NEN. In addition to a rational production, this has further advantages, so connectors can be added to the pipes in still rotationally symmetrical state before bending, which minimizes the number of devices. Furthermore, in bending variants on the basis of the same output pipe lengths, the storage of the primary products can be simplified.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

L'invention concerne un composite multicouche (2), notamment pour une conduite de fluide (1), ainsi qu'une conduite de fluide (1) correspondante. Ce composite multicouche (2) présente une première couche (5) constituée d'un fluoropolymère, une deuxième couche (6) suivant directement la première couche (5) et constituée d'un polyamide partiellement aromatique, et une troisième couche (7) suivant directement la deuxième couche (6) et constituée d'un copolymère éthylène-alcool vinylique et/ou d'un polyamide aliphatique.
PCT/EP2018/082068 2017-11-29 2018-11-21 Composite multicouche et conduite de fluide WO2019105822A1 (fr)

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DE102017221467.8 2017-11-29
DE102017221467.8A DE102017221467A1 (de) 2017-11-29 2017-11-29 Mehrschichtverbund sowie Fluidleitung

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1162061A1 (fr) 2000-06-09 2001-12-12 EMS-Chemie AG Stratifiés thermoplastiques
WO2006040206A1 (fr) 2004-10-07 2006-04-20 Degussa Gmbh Composite multicouche comportant une couche evoh et une couche de protection
WO2007019921A1 (fr) 2005-08-19 2007-02-22 Veritas Ag Corps creux dote d'une double couche barriere
US20140299220A1 (en) * 2011-04-14 2014-10-09 Arkema France Multilayer structure including a layer of a specific copolyamide and a barrier layer
DE102013013163A1 (de) 2013-07-18 2015-01-22 Kautex Textron Gmbh & Co. Kg Mehrlagiges Verbundmaterial und Gegenstände umfassend dasselbe
EP3069876A1 (fr) * 2015-03-17 2016-09-21 Evonik Degussa GmbH Composite multicouches comprenant une couche en polyamide partiellement aromatique
EP3069873A1 (fr) * 2015-03-17 2016-09-21 Evonik Degussa GmbH Composite multicouches comprenant des couches en polyamides partiellement aromatiques

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1162061A1 (fr) 2000-06-09 2001-12-12 EMS-Chemie AG Stratifiés thermoplastiques
WO2006040206A1 (fr) 2004-10-07 2006-04-20 Degussa Gmbh Composite multicouche comportant une couche evoh et une couche de protection
WO2007019921A1 (fr) 2005-08-19 2007-02-22 Veritas Ag Corps creux dote d'une double couche barriere
US20140299220A1 (en) * 2011-04-14 2014-10-09 Arkema France Multilayer structure including a layer of a specific copolyamide and a barrier layer
DE102013013163A1 (de) 2013-07-18 2015-01-22 Kautex Textron Gmbh & Co. Kg Mehrlagiges Verbundmaterial und Gegenstände umfassend dasselbe
EP3069876A1 (fr) * 2015-03-17 2016-09-21 Evonik Degussa GmbH Composite multicouches comprenant une couche en polyamide partiellement aromatique
EP3069873A1 (fr) * 2015-03-17 2016-09-21 Evonik Degussa GmbH Composite multicouches comprenant des couches en polyamides partiellement aromatiques

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