EP3938208A1 - Tuyau pour fluide frigorigène - Google Patents

Tuyau pour fluide frigorigène

Info

Publication number
EP3938208A1
EP3938208A1 EP20702977.8A EP20702977A EP3938208A1 EP 3938208 A1 EP3938208 A1 EP 3938208A1 EP 20702977 A EP20702977 A EP 20702977A EP 3938208 A1 EP3938208 A1 EP 3938208A1
Authority
EP
European Patent Office
Prior art keywords
layer
hose
inner layer
elastomer
barrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20702977.8A
Other languages
German (de)
English (en)
Inventor
Alexandra Brandt
Michael Sont
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ContiTech Techno Chemie GmbH
Original Assignee
ContiTech Techno Chemie 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 ContiTech Techno Chemie GmbH filed Critical ContiTech Techno Chemie GmbH
Publication of EP3938208A1 publication Critical patent/EP3938208A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/085—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more braided 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
    • 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
    • B32B27/306—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
    • 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
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/026—Knitted fabric
    • 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/081—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire
    • F16L11/082—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire two 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0223—Vinyl resin fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
    • 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
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • 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
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • 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
    • 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L2011/047—Hoses, i.e. flexible pipes made of rubber or flexible plastics with a diffusion barrier layer

Definitions

  • the invention relates to a refrigerant hose, at least the following
  • an inner layer that acts as a barrier layer and consists of at least two layers
  • An outer layer which is composed of at least one elastomeric material.
  • Refrigerant hoses that are installed in air conditioning systems for the automotive industry are usually filled with fluorocarbons as refrigerants. When released into the atmosphere, this type of refrigerant has a negative impact on the Elm world, for example in the form of acid rain, the greenhouse effect or the depletion of the ozone layer.
  • CO 2 is a more environmentally friendly refrigerant. Due to its molecular size and its physico-chemical properties, however, it places higher demands and challenges on the air conditioning system, which must be met or solved by new hose systems, among other things.
  • Hoses that are used for conventional refrigerants usually consist of three different layers: an inner layer, a reinforcement layer and an outer layer, whereby the outer layer and the inner layer are usually made of an elastomeric material and the inner layer is often multi-layered, plus one layer made of a thermoplastic material, which significantly improves the barrier properties of the hose with regard to refrigerant loss, but at the same time worsens the flexibility of the hose.
  • EPDM, EPM, BIMS, BIIR, CIIR, IIR, CM, AEM, ACM, CR, NBR, HNBR alone or in combination can be used as elastomers for the inner layer and / or the outer layer.
  • the reinforcement layer usually consists of organic fiber systems, such as
  • Polyester polyamide, rayon, aramid or PVOH yarn and is usually braided or spiraled, i.e. wrapped shape.
  • two reinforcement layers are usually used, which are the same or
  • a further elastomer layer can be integrated as an intermediate layer between the two wound fiber layers.
  • additional adhesion promoter layers can be added to the hose structure.
  • thermoplastic layer of the inner layer can either be inside the tube (veneer tube also, see FIGS. 1 and 2) or it can be embedded as a barrier layer between two further layers of the inner layer (barrier tube also, see FIGS. 3 and 4).
  • Polyamides have proven themselves as the material for the barrier layer.
  • impact-modified PA.6 grades are used because of their good compromise between flexibility and
  • the hose structure described above gives the hose enough flexibility to be laid and installed in a narrow space and at the same time has sufficiently good barrier properties, e.g. to counteract a loss of refrigerant of refrigerants R134a (1,1,2-tetrafluoroethane) or R1234yf (2,3,3,3-tetrafluoropropene) to an adequate extent.
  • the hose structure mentioned must be redesigned for use with CO2 as a refrigerant, since the common air conditioning hoses do not have a sufficient barrier function against CO2.
  • the object of the present invention is therefore to provide a refrigerant hose which, on the one hand, has an inner layer resistant to the refrigerant, in particular to CO2, with an optimized barrier effect and, on the other hand, has sufficient flexibility and high resistance to dynamic
  • an inner layer that acts as a barrier layer and consists of at least two layers
  • At least one layer being constructed from an elastomer-modified EVOH or a polyolefin-modified EVOH or from a combination of an elastomer-modified EVOH and a polyolefin-modified EVOH, and
  • An outer layer which is composed of at least one elastomeric material.
  • modified EVOH results in increased flexibility and an associated improved dynamic-mechanical resistance compared to unmodified EVOH.
  • the barrier layer is made up of at least two layers and has at least one layer which is made up of an elastomer- or polyolefin-modified EVOH or a combination of the two.
  • This layer forms the so-called barrier layer of the hose.
  • the EVOH contained in the barrier layer is made up of at least two layers and has at least one layer which is made up of an elastomer- or polyolefin-modified EVOH or a combination of the two.
  • This layer forms the so-called barrier layer of the hose.
  • the modified EVOH contains 5 to 40% by weight of elastomer or polyolefin or a combination of both, with 10% by weight of elastomer preferably being selected in order to give the EVOH sufficient flexibility or impact modification on the one hand, but at the same time the barrier effect of the entire material as possible up to hold.
  • the elastomer for the modification is preferably a non-polar elastomer, which is also either completely or partially
  • connection modified in order to be able to enter into a homogeneous bond with the EVOH.
  • Particularly good results can be achieved when using a maleic anhydride-grafted elastomer.
  • further modifications of the elastomer or polyolefin by other functional groups are also conceivable, as long as these can form a bond with the EVOH.
  • the barrier layer preferably has a layer thickness between 0.02 and 0.3 mm.
  • the barrier layer which is also referred to below as the inner layer, also contains at least one further second layer.
  • polymer materials for this second layer polyamides, polyolefins,
  • thermoplastic elastomers and elastomers and combinations thereof can be used. These can include the following materials: PP, PE, PMP, TPC, PA6, PA66, PA11, PA12, PA46, PA610, PA9T, PA6T, EPM, EPDM, BR, IIR, BIIR,
  • the further second layer preferably has a layer thickness between 0.05 and 0.5 mm, particularly preferably between 0.15 and 0.3 mm.
  • the inner layer consists of the two layers mentioned, whereby the further second layer, which forms the innermost layer of the hose, serves as a protective layer for the barrier layer, can also make a positive contribution to the barrier function of the barrier layer, depending on the choice of material.
  • the further second layer which forms the innermost layer of the hose, serves as a protective layer for the barrier layer, can also make a positive contribution to the barrier function of the barrier layer, depending on the choice of material.
  • the inner layer consists of three layers, the further second layer, which forms the innermost layer of the hose, serving as a protective layer for the barrier layer (analogous to the two-layer structure of FIG.
  • Inner layer) and the additional third layer is preferably composed of at least one elastomer.
  • EPDM, EPM, BIMS, BIIR, CIIR, IIR, CM, AEM, ACM, CR, NBR or HNBR or combinations of the above are preferably used as elastomers.
  • the barrier properties of the additional third layer can be increased by adding layered silicates, graphene or other plate-like fillers with a high
  • the third layer is preferably in extruded form.
  • this preferably has a layer thickness between 0.2 and 2 mm, particularly preferably between 0.2 and 0.5 mm.
  • the hose according to the invention also contains at least one reinforcement layer and an outer layer, i.e. Outer layer.
  • the reinforcement layer is applied by braiding or spiraling.
  • a knitted fabric is also possible for areas of application with low pressure requirements.
  • Aramids such as p-aramid or m-aramid, polyamides, PET or PVOH, are preferably suitable as the material for the reinforcement layer, depending on the pressure requirements
  • the outer layer is composed of at least one elastomeric material, which can preferably be EPDM, EPM, BIMS, BIIR, CIIR, IIR, CM, AEM, ACM, CR, NBR or HNBR or combinations thereof.
  • the barrier properties of the outer layer can be optimized by adding layered silicates, graphenes or other plate-shaped fillers with a high aspect ratio.
  • the outer layer is preferably in extruded form.
  • the outer layer preferably has a layer thickness between 0.2 to 2 mm, particularly preferably between 0.7 and 1.5 mm.
  • the refrigerant hose also contains at least one intermediate layer.
  • the intermediate layer is preferably composed of at least one elastomeric material, advantageously EPDM, EPM, BIMS, BIIR, CIIR, IIR, CM, AEM, ACM, CR, NBR or HNBR or
  • the barrier properties of the intermediate layer can be optimized by adding layered silicates, graphenes or other plate-shaped fillers with a high aspect ratio.
  • the intermediate layer is preferably in extruded form.
  • the intermediate layer preferably has a layer thickness between 0.1 and 1.5 mm, particularly preferably between 0.2 and 0.7 mm.
  • the individual plies and / or layers of the refrigerant hose are preferably applied to a mandrel in extruded form.
  • the hose is then vulcanized or partially vulcanized and thorned.
  • the partially vulcanized hose can be used for molded hose production and is vulcanized to the end in the molding process.
  • Table 1 shows various physical test results using a
  • the test results were determined using DIN Spec 74106.
  • the rating “+” means that the test was passed, the rating means that the test was not passed.
  • the hose structure was as follows:
  • Another second inner layer A2 PA6 (Orgalloy LT5050, Arkema company), layer thickness 0.3 mm
  • Barrier layer A1 elastomer-modified EVOH (Eval LA170B, from Kuraray) (El) or unmodified EVOH (Evasin 2951F, from Arkema) (VI), layer thickness 0.1 mm
  • Reinforcement layer B p-aramid, braided
  • Outer layer C EPM, layer thickness 0.85 to 1mm
  • the inventive refrigerant hose E1 is suitable as a refrigerant hose for use in the low-temperature areas of an air conditioning system (currently max. 130 ° C.) and CO2 as the refrigerant. It is characterized by high barrier properties,
  • FIG. 1 shows a refrigerant hose in the form of a veneer hose from the prior art with a braided reinforcement layer B, a two-layer structure of the Inner layer A, in which the thermoplastic layer A1 of the inner layer A consists of polyamide and, as a barrier layer, forms the innermost layer of the inner layer A, another second layer A2 of the inner layer A and an outer layer C.
  • Fig. 2 shows a refrigerant hose in the form of a veneer hose from the prior art with two spiralized reinforcement layers B1, B2, a two-layer structure of the inner layer A, in which the thermoplastic layer A1 of the inner layer A consists of polyamide and the innermost as a barrier layer Layer of the inner layer A forms, another second layer A2 of the inner layer A, an additional elastomeric
  • Fig. 3 shows a refrigerant hose in the form of a barrier hose from the prior art with a braided reinforcement layer B, a three-layer structure of the inner layer A, in which the thermoplastic layer A1 of the inner layer made of polyamide as a barrier layer between two further layers A2, A3 the inner layer A is embedded, a further second layer A2 of the inner layer A, an additional third layer A3 of the inner layer A and an outer layer C.
  • Fig. 4 shows a refrigerant hose in the form of a barrier hose from the prior art with two spiralized reinforcement layers B1, B2, a three-layer structure of the inner layer A, in which the thermoplastic layer A1 of the inner layer A made of polyamide as a barrier layer between two further layers A2, A3 of the inner layer A is embedded, a further second layer A2 of the inner layer A, an additional third layer A3 of the inner layer A, an additional elastomeric intermediate layer D and an outer layer C.
  • Fig. 5 shows a refrigerant hose according to the invention with a braided or knitted reinforcement layer B, a three-layer structure of the inner layer A, in which the barrier layer A1 of the inner layer A made of elastomer-modified EVOH or polyolefin-modified EVOH is embedded between two further layers A2, A3 of the inner layer A, one a further second layer A2 of the inner layer A, an additional third layer A3 of the inner layer A, and an outer layer C.
  • the materials of the two further layers A2, A3 of the inner layer A are different from the material of the barrier layer Al.
  • FIG. 6 shows a refrigerant hose according to the invention with two spiralized reinforcement layers B1, B2, a three-layer structure of the inner layer A, in which the barrier layer A1 of the inner layer A made of elastomer-modified EVOH or polyolefin-modified EVOH is embedded between two further layers A2, A3 of the inner layer A, a further second layer A2 of the inner layer A, an additional third layer A3 of the inner layer A, an additional intermediate layer D and an outer layer C.
  • the materials of the two further layers A2, A3 of the inner layer A are different from the material of the barrier layer.
  • A2 further second layer of inner layer A3 additional third layer of inner layer B single reinforcement layer B1 first reinforcement layer

Abstract

L'invention concerne un tuyau pour un fluide frigorigène, qui comprend au moins la structure en couches suivante : – une couche intérieure (A) qui agit en tant que couche barrière et qui est constituée d'au moins deux couches (A1, A2), au moins une couche (A1) étant constituée d'un EVOH modifié par un élastomère ou d'un EVOH modifié par une polyoléfine ou d'une combinaison d'un EVOH modifié par un élastomère et d'un EVOH modifié par une polyoléfine et – au moins une couche de renfort (B) et – une couche extérieure (C) qui est constituée d'au moins un matériau élastomère.
EP20702977.8A 2019-03-11 2020-01-27 Tuyau pour fluide frigorigène Pending EP3938208A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019203254.0A DE102019203254A1 (de) 2019-03-11 2019-03-11 Kältemittelschlauch
PCT/EP2020/051843 WO2020182360A1 (fr) 2019-03-11 2020-01-27 Tuyau pour fluide frigorigène

Publications (1)

Publication Number Publication Date
EP3938208A1 true EP3938208A1 (fr) 2022-01-19

Family

ID=69411413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20702977.8A Pending EP3938208A1 (fr) 2019-03-11 2020-01-27 Tuyau pour fluide frigorigène

Country Status (5)

Country Link
US (1) US20220186858A1 (fr)
EP (1) EP3938208A1 (fr)
CN (1) CN113795382A (fr)
DE (1) DE102019203254A1 (fr)
WO (1) WO2020182360A1 (fr)

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MX2023006276A (es) * 2020-12-18 2023-07-26 Martinrea Int Us Inc Tubería de transporte de vapor y combustible automotriz con una estructura de monocapa o multicapa que incorpora grafeno.

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