EP4452624A1 - Hochdruckschläuche zur abgabe von wasserstoff - Google Patents
Hochdruckschläuche zur abgabe von wasserstoffInfo
- Publication number
- EP4452624A1 EP4452624A1 EP22826350.5A EP22826350A EP4452624A1 EP 4452624 A1 EP4452624 A1 EP 4452624A1 EP 22826350 A EP22826350 A EP 22826350A EP 4452624 A1 EP4452624 A1 EP 4452624A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polyamide
- pressure
- hose
- fibers
- acid
- 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
Links
Classifications
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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
- 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
- B32B25/14—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
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/18—Layered products comprising a layer of natural or synthetic rubber comprising butyl or halobutyl rubber
-
- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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- 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
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- 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
- F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
- F16L11/127—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting electrically conducting
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
-
- 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
-
- 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
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/265—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids from at least two different diamines or at least two different dicarboxylic acids
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- 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 present invention relates to a high-pressure hose with a pressure classification of H70 according to DIN ISO 19880-5 and/or a bursting pressure of at least 3500 bar, the hose having a layered structure with a barrier layer made of PA9T, at least one reinforcement layer and an outer layer made of a polymeric material having.
- the present invention further relates to methods for producing such hoses, tank filling devices equipped with such hoses, and uses of corresponding high-pressure hoses for transferring hydrogen from a storage container into a tank.
- nylon e.g. in the form of nylon 6, nylon 66, or nylon 11
- polyacetal e.g. in the form of nylon 6, nylon 66, or nylon 11
- NBR nitrile butadiene rubber
- EP 3 627 026 A1 describes hydrogen fuel hoses with an inner and outer layer and three or more reinforcing layers having a precisely specified braid angle of 53.5 to 55.5°.
- the inner layer is made of nylon and the outer layer is made of polyester.
- JP 2017-106553 A describes hydrogen hoses with a high bursting resistance which, in addition to inner and outer layers, have reinforcing layers made from polyparaphenylenebenzbisoxazole fibers with which a working pressure of 70 MPa can be achieved.
- Elaflex sells a hydrogen hose for mobility applications that has an inner NBR layer modified to provide electrical conductivity, several layers of low-stretch textile braiding and an outer layer of chloroprene rubber (see https://elaflex.de/doku-
- EP 2 250 417 B1 discloses hoses with an inner layer, various textile reinforcement layers made of polyester or nylon fabric and an outer cover layer which are said to have a maximum bursting pressure of at least 62 MPa.
- the inner layer in these hoses is said to be formed from an elastomer such as chloroprene or chlorosulfonated polyethylene or plastic.
- the barrier layer material in hoses for conducting hydrogen at high pressure has to meet various requirements, there is the problem of providing materials that have the most favorable overall property profile possible.
- ethylene-vinyl alcohol copolymers while exhibiting very low permeability to hydrogen gas, do not have satisfactory mechanical and strength properties (eg, tensile strength, elongation at break, or impact strength).
- polyamides such as nylon 6 or nylon 11 have favorable elongation at break or impact strength properties, the tensile strength of these materials is comparatively low and the Hydrogen gas permeability is also not satisfactory.
- PEEK polyetheretherketone
- barrier material that has the lowest possible permeability to hydrogen and that at the same time imparts favorable flexibility and mechanical properties and can be processed at lower temperatures than, for example, PEEK. Furthermore, such a material should, if possible, allow for the incorporation of additives to impart electrical conductivity without significantly impairing the mechanical and permeability properties of the material.
- the present invention addresses this need.
- a special polyamide namely a polyamide made from terephthalic acid and 1,9-nonanediamine and 2-methyl-1,8-octanediamine (also referred to as PA9T) has a very favorable profile of properties with suitable flexibility and has mechanical properties and low hydrogen permeability, and can also be processed by extrusion and allows the inclusion of additives to impart electrical conductivity.
- the present invention relates to a high-pressure hose with a pressure classification of H70 according to DIN ISO 19880-5 and/or a bursting pressure of at least 3500 bar, the hose having a layered structure with a barrier layer, at least one reinforcement layer and one made of a polymeric material formed outer layer and wherein the barrier layer is formed from a polyamide having a carboxylic acid and a diamine component, wherein 60 to 100 mol% of the carboxylic acid component is a terephthalic acid and 60 to 100 mol% of the diamine component is a diamine component selected from 1,9- nonanediamine and 2-methyl 1,8-octanediamine (hereinafter this polyamide is sometimes simply referred to as "PA9T").
- H70 pressure classification it should be noted that DIN ISO 19880-5 specifies a number of specifications (e.g. on electrical conductivity), which do not necessarily have to be complied with in the invention.
- the reference to the H70 pressure classification is to be understood in the context of the invention described here primarily as a reference to a minimum bursting pressure that must be achieved by an H70 hose.
- HSL hydrogen service level
- the amount of terephthalic acid used in the polyamide of the barrier layer is 60% by mole or more, more preferably 75% by mole or more, and more preferably 90% by mole or more based on the total dicarboxylic acid component. If the amount of the terephthalic acid used is less than 60 mol%, the desired properties and particularly the gas permeability to hydrogen gas are impaired.
- dicarboxylic acid components other than terephthalic acid which can also be contained in the carboxylic acid component, include aliphatic dicarboxylic acids such as malonic acid, dimethylmalonic acid, succinic acid, glutaric acid, adipic acid, 2-methyladipic acid, trimethyladipic acid, pimelic acid, 2,2-dimethylglutaric acid, 3, 3-diethylsuccinic acid, azelaic acid, sebacic acid and suberic acid (octanedioic acid); alicyclic dicarboxylic acids such as 1,3-cyclopentanedicarboxylic acid and 1,4-cyclohexanedicarboxylic acid; aromatic dicarboxylic acids such as isophthalic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 1,4-naphthalenedicarboxylic acid, 1,4-phenylenedioxydiacetic acid, 1,
- aromatic dicarboxylic acids are preferred.
- a polybasic carboxylic acid such as trimellitic acid, trimesic acid and pyromellitic acid may also be contained in the dicarboxylic acid component insofar as it does not significantly impair the moldability of the polyamide.
- a diamine selected from 1,9-nonanediamine and/or 2-methyl-1,8-octanediamine is predominantly used as the diamine component of the polyamide.
- the amount of the diamine used is 60% by mole or more, preferably 70% by mole or more, and more preferably 80% by mole or more based on the whole diamine component.
- a diamine selected from 1,9-nonanediamine and/or 2-methyl-1,8-octanediamine is used as the diamine component in the amount described above, particularly favorable mechanical properties and desirable gas-tightness against hydrogen gas are exhibited.
- the molar ratio of 1,9-nonanediamine and 2-methyl-1,8-octanediamine is preferably from 30:70 to 95:5, and more preferably from 40:60 to 90:10.
- diamines examples include aliphatic diamines such as ethylenediamine, propylenediamine, 1,4-butanediamine, 1,6-hexanediamine, 1,8-octanediamine, 1,10-decanediamine, 1,12- Dodecanediamine, 3-methyl-1,5-pentanediamine, 2,2,4-trimethyl-1,6-hexanediamine, 2,4,4-trimethyl-1,6-hexanediamine and 5-methyl-1,9- nonanediamine; alicyclic diamines such as cyclohexanediamine, methylcyclohexanediamine and isophoronediamine; aromatic diamines such as p-phenylenediamine, m-phenylenediamine, p-xylenediamine, m-xylenediamine, 4,4'-diaminodiphenylmethane, 4,4'-diaminodiphenyl sulfone,
- the end of the molecular chain is preferably blocked by a blocking agent which preferably blocks 40% or more, more preferably 60% or more, and more preferably 70% or more of the end groups in the PA9T.
- the molecular chain terminal-blocking agent is not particularly limited as long as it is a monofunctional compound having a group reactive with amino or carboxyl groups at the terminal of the polyamide.
- Monocarboxylic acids and monoamines are preferred from the viewpoints of reactivity and stability of the blocked end, and monocarboxylic acids are more preferred from the viewpoint of ease of handling.
- acid anhydrides, monoisocyanates, monoacid halides, monoesters and monoalcohols can also be used.
- a monocarboxylic acid used as a blocking agent for terminal groups of the PA9T is not relevantly limited as long as it is sufficiently reactive with an amino group;
- suitable monocarboxylic acids are, for example aliphatic monocarboxylic acids such as acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, capric acid, lauric acid, tridecylic acid, myristic acid, palmitic acid, stearic acid, pivalic acid and isobutyric acid; alicyclic monocarboxylic acids such as cyclohexanecarboxylic acid; aromatic monocarboxylic acids such as benzoic acid, toluic acid, o-naphthoic acid, ⁇ -naphthoic acid, methylnaphthoic acid and phenylacetic acid; and any mixtures thereof.
- acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, capric acid, lauric acid, tridecylic acid, myristic acid, palmitic acid, stearic acid and benzoic acid are particularly preferred as the acid blocking agent.
- a monoamine used as a terminal blocking agent of PA9T is also not particularly limited as long as it is sufficiently reactive with a carboxyl group.
- suitable monoamines include aliphatic monoamines such as methylamine, ethylamine, propylamine, butylamine, hexylamine, octylamine, decylamine, stearylamine, dimethylamine, diethylamine, dipropylamine and dibutylamine; alicyclic monoamines such as cyclohexylamine and dicyclohexylamine; aromatic amines such as aniline, toluidine, diphenylamine and naphthylamine; and any mixture thereof.
- butylamine, hexylamine, octylamine, decylamine, stearylamine, cyclohexylamine and aniline are particularly preferred in view of reactivity, boiling point, stability of the blocked end and cost.
- the amount of end-blocking agent used to prepare PA9T is determined by the intrinsic viscosity [q] of the resulting polyamide resin and the percentage of end-blocks blocked. Concretely, the amount used is usually 0.5 to 10 mol% based on the total moles of the dicarboxylic acid component and the diamine component, although it varies depending on the reactivity and boiling point of the end-capping agent used, reaction conditions and the like.
- the PA9T for use in the present invention preferably has an intrinsic viscosity [q] measured at 30°C in concentrated sulfuric acid of 0.4 to 3.0 dl/g, more preferably 0.6. to 2.5 dl/g, even more preferably from 0.8 to 2.0 dl/g.
- the PA9T can be used alone or as a blend with other polyamide resins or other thermoplastic resins. In the mixture, however, the PA9T content is preferably 60% by weight or more.
- polyamide resins examples include, for example, nylon 11, nylon 12 and/or nylon 6.
- PA9T products which can be used for the production of the barrier layer of the high-pressure hoses according to the invention are, for example, the products sold by Kuraray under the trade name GENESTAR.
- the polyamide of the barrier layer has an overall gas permeability for hydrogen (H2) of 2000 cm 3 /(m 2 *d) or less (determined according to DIN 53880 (2006) at 30° C. and 30 bar, 0% relative humidity)), in particular 1800 cm 3 /(m2*d) or less and particularly preferably 1700 cm 3 /(m2*d) or less.
- H2 overall gas permeability for hydrogen
- the PA9T in the barrier layer may additionally contain one or more additives selected from one or more of antioxidants, heat stabilizers, ultraviolet absorbers, light stabilizers, lubricants, inorganic fillers, antistatic agents, flame retardants, crystallization accelerators, plasticizers, colorants, impact modifiers and the like.
- the PA9T for use in the barrier layer can be produced by a polyamide polymerization process common in the art, which is known as a process for producing a crystalline polyamide.
- a polyamide polymerization process common in the art, which is known as a process for producing a crystalline polyamide.
- known apparatuses for producing polyamides such as a batch system reactor, a single-bath or multi-bath continuous reactor, a tubular continuous reactor and a kneading reaction extruder (e.g., single-screw extruder, twin-screw extruder) can also be used.
- the PA9T can be prepared using any known polymerization method such as melt polymerization, solution polymerization and solid state polymerization and repeating the process under atmospheric pressure, reduced pressure or elevated pressure. These polymerization methods can be used singly or in a suitable combination.
- the barrier layer has a thickness adapted to achieve the desired gas permeability.
- the barrier layer preferably has a thickness of at least 0.2 mm and less than 2.0 mm, with a thickness in the range of 0.5 to 1.5 mm being preferred.
- the inner diameter of the barrier layer is preferably at least 6 mm and is more preferably in the range from 7 mm to 12 mm.
- the barrier layer can contain an electrically conductive additive or filler.
- Suitable electrically conductive additives or fillers are any filler capable of imparting electrically conductive properties to the polyamide, e.g., particulate, flaky, or fibrous fillers.
- suitable particulate fillers are carbon black and graphite.
- flaky filler that can be suitably used are aluminum flake, nickel flake and nickel-coated mica.
- fibrous fillers include carbon fibers, carbon nanotubes, carbon-coated ceramic fibers, carbon whiskers, and metal fibers such as aluminum fibers, copper fibers, brass fibers, and stainless steel fibers. Of these, carbon black and a mixture of carbon black and carbon nanotubes are most preferred as the filler imparting electrical conductivity.
- Carbon black that can be used in the present invention includes all carbon blacks that are generally used to impart electrical conductivity.
- Preferred examples of the carbon black include, but are not limited to, acetylene black obtained by the complete combustion of acetylene gas, Ket-jen black produced by the furnace-type incomplete combustion starting from crude oil, oil black, naphthalene black, thermal black, lamp black, channel black, Roller Black and Disc Black. Of these, acetylene black and furnace black (Ketjen black) are more preferred.
- carbon black various carbon powders are produced, differing in properties such as particle size, surface area, DBP absorption and ash content.
- the carbon black that can be used in the present invention is not particularly limited in terms of these properties, but however, those having a good chain structure and a large aggregation density are preferred. In view of the impact resistance, the carbon black is preferably not blended in a large amount.
- the average particle size of carbon black is preferably 500 nm or less, more preferably 5 to 100 nm, and even more preferably 10 to 70 nm
- the surface area (by BET method) is preferably 10 m 2 / g or more, more preferably 300 m 2 / g or more, and even more preferably 500 to 1,500 m 2 / g
- the DBP (dibutyl phthalate) absorption is preferably 50 ml / 100 g or more, more preferably 100 ml/100 g or more, and more preferably 300 ml/100 g or more.
- the ash content of carbon black is preferably 0.5% or less, and more preferably 0.3% or less.
- DBP absorbance as used herein means a value measured according to the method prescribed in ASTM-D2414. A carbon black having a volatile content of less than 1.0% by weight is more preferred.
- the electroconductive filler may be surface-treated with a surface-treating agent such as a titanate-type, aluminum-type, or silane-type surface-treating agent.
- a surface-treating agent such as a titanate-type, aluminum-type, or silane-type surface-treating agent.
- the electroconductive filler may be particulate in order to improve processability in melt-kneading with polyamide resin.
- an electroconductive filler proportion may be 3 to 30 parts by weight per 100 parts by weight of polyamide, preferably per 100 parts of PA9T, are indicated as favorable.
- the electroconductive filler is preferably blended in such an amount that the molded article obtained by melt-extruding the polyamide composition containing the electroconductive filler has conductivity suitable for static electricity dissipation.
- mixing in the electrically conductive filler tends to result in a reduction in the mechanical properties Strength and melt flowability such that the amount should be limited to the minimum required for the desired level of electrical conductivity.
- the barrier layer can be formed as the innermost layer of the high-pressure hose, or another material can form the innermost layer and the barrier layer can be arranged on top of it.
- the other material usually has a higher permeability to hydrogen than the barrier layer.
- the high-pressure hose according to the invention can have further polymer layers between the barrier layer and reinforcement layers, between reinforcement layers or between the outermost reinforcement layer and the outer layer formed from a polymeric material.
- the high-pressure hose according to the invention also contains at least one reinforcement layer, with several reinforcement layers, i.e. for example two, three, four, five or six reinforcement layers being preferred.
- reinforcement layers i.e. for example two, three, four, five or six reinforcement layers being preferred.
- one or more reinforcement layers are formed from a woven, knitted or braided fiber material, the fibers being sufficiently stable and having a strength suitable for absorbing high internal pressures. Fibers with a tensile strength, determined according to DIN EN ISO 2062 (2010), of at least 2 GPa are preferred here.
- the fibers may be formed from an organic polymer, e.g., polyamide, polyester or polyethylene of higher molecular weight, e.g., greater than 3,000,000 g/mol (UHMWPE).
- the fibers are based on polyparaphenylene benzobisoxazole or UHMWPE.
- the reinforcement or reinforcements can advantageously also be designed as a cord or band made of the materials mentioned with a unidirectional orientation, in particular if the reinforcement is made of UHMWPE.
- one or more reinforcing layer(s) can be formed from metal wire or strip, with metal wires and strips in particular made of steel, copper or copper alloy (according to JIS H 3260), aluminum or aluminum alloy (according to JIS H 4040), magnesium alloy ( according to JIS H 4203), titanium or titanium alloy (according to JIS H 4670) can be used.
- polymeric material that forms the outer layer of the high-pressure hose according to the invention is not subject to any relevant restrictions, with the proviso that the material should be sufficiently flexible and stable over the service temperature of the hose.
- Preferred polymeric materials here are, for example, rubbers such as chloroprene rubber, chloroprene acrylate rubber, butyl rubber, ethylene-propylene rubber, chlorosulfonated polyethylene rubber, or thermoplastic polyurethane elastomer and thermoplastic materials such as polyurethane, polyamide, e.g. polyamide 12, or polyester .
- the outer layer expediently has a thickness in the range of at least 0.2 mm and 1.5 mm or less, with a thickness in the range of at least 0.5 mm and 1.0 mm or less being preferred.
- the outer diameter of the outer layer is not subject to any relevant restrictions, but will usually be at least 12 mm and 18 mm or less.
- the outer layer may be continuous.
- the outer layer can have perforations through which gases, in particular in the form of hydrogen, penetrating the tube from the inside to the outside can escape in order to prevent the formation of bubbles or delamination of tube layers.
- the present invention relates to a method for producing a high-pressure hose as described above, which comprises the following steps:
- Applying a layer of polyamide involves applying a layer of PA9T-polyamide as described above or a polyamide composition containing PA9T-polyamide and other additives as described above.
- the application of the polyamide to the mandrel or without a mandrel is usually carried out from the melt, for example by extrusion.
- the present invention relates to a tank filling device which comprises a high-pressure hose as described above.
- the tank filling device suitably comprises a dispensing device for fuel conducted through the device and a closure device in order to connect the dispensing device in a pressure-tight manner to a container into which a fuel (i.e. in particular hydrogen) is to be introduced.
- a fuel i.e. in particular hydrogen
- the present invention relates to the use of a high-pressure hose as described above for transferring hydrogen from a storage container into a tank.
- the tank is particularly preferably the tank of an airplane, ship or vehicle, such as a passenger car, truck or rail vehicle.
- the present invention relates to the use of polyamide with a carboxylic acid and a diamine component, wherein 60 to 100 mol% of the carboxylic acid component is a terephthalic acid and 60 to 100 mol% of the diamine component is a diamine component selected from 1,9-nonanedia - min and 2-methyl-1,8-octanediamine, as a barrier layer material in a hose for transporting hydrogen having a density of at least 24 kg/m 3 and preferably in the range of 35 to 45 kg/m 3 .
- Example 1 Comparison of the properties of different materials for the inner layer of a high-pressure hydrogen hose
- PA9T is in the top 3 in each of the categories of tensile strength, notched impact strength and gas permeability, while other materials fall significantly in at least one of these categories. PA9T shows clear advantages across all parameters. In addition, PA9T allows due to Its melting point means it is easy to process and also has sufficient temperature resistance and meets the (di)electric property criteria according to ISO 19880-5 (Section 7.18.4.: Criteria of electric properties of lining material).
- Example 2 Production of a high-pressure hose according to the invention
- a high-pressure hose with an analogous structure was produced in which the reinforcement layers each contained metal wires or an electrically conductive textile yarn in order to avoid electrical charging in the hose reinforcement area.
- the hoses produced in this way were stable up to a pressure of 3500 bar and were sufficiently impervious to hydrogen.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021134548.0A DE102021134548A1 (de) | 2021-12-23 | 2021-12-23 | Hochdruckschläuche zur Abgabe von Wasserstoff |
| PCT/DE2022/200292 WO2023116988A1 (de) | 2021-12-23 | 2022-12-07 | Hochdruckschläuche zur abgabe von wasserstoff |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4452624A1 true EP4452624A1 (de) | 2024-10-30 |
Family
ID=84537784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22826350.5A Pending EP4452624A1 (de) | 2021-12-23 | 2022-12-07 | Hochdruckschläuche zur abgabe von wasserstoff |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4452624A1 (de) |
| DE (1) | DE102021134548A1 (de) |
| WO (1) | WO2023116988A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20250266474A1 (en) * | 2024-02-15 | 2025-08-21 | Contitech Techno-Chemie Gmbh | Low hydrogen permeating flexible barrier hose for anode wet line in fuel cell system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0510314B1 (pt) * | 2004-04-27 | 2016-10-18 | Kuraray Co | estrutura em multicamadas |
| US7694695B2 (en) | 2008-02-26 | 2010-04-13 | The Gates Corporation | Controlled expansion hose |
| JP4893877B2 (ja) * | 2010-06-02 | 2012-03-07 | 横浜ゴム株式会社 | 冷媒輸送用ホース |
| JP6152886B2 (ja) | 2015-12-10 | 2017-06-28 | 横浜ゴム株式会社 | 水素充填用ホース |
| JP6988159B2 (ja) | 2017-05-16 | 2022-01-05 | 横浜ゴム株式会社 | 高圧ホース |
-
2021
- 2021-12-23 DE DE102021134548.0A patent/DE102021134548A1/de active Pending
-
2022
- 2022-12-07 EP EP22826350.5A patent/EP4452624A1/de active Pending
- 2022-12-07 WO PCT/DE2022/200292 patent/WO2023116988A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021134548A1 (de) | 2023-06-29 |
| WO2023116988A1 (de) | 2023-06-29 |
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