Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B38/00—Ancillary operations in connection with laminating processes
  • B32B38/08—Impregnating
• • 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
• • 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
  • B32B27/12—Layered products comprising a layer of synthetic resin 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
  • 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
  • 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
  • B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
  • F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
  • B29C53/56—Winding and joining, e.g. winding spirally
  • B29C53/58—Winding and joining, e.g. winding spirally helically
  • B29C53/581—Winding and joining, e.g. winding spirally helically using sheets or strips consisting principally of plastics material
  • B29C53/582—Winding and joining, e.g. winding spirally helically using sheets or strips consisting principally of plastics material comprising reinforcements, e.g. wires, threads
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
  • B29C53/56—Winding and joining, e.g. winding spirally
  • B29C53/58—Winding and joining, e.g. winding spirally helically
  • B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
  • B29C53/602—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels for tubular articles having closed or nearly closed ends, e.g. vessels, tanks, containers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
  • B29C63/0017—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor characterised by the choice of the material
  • B29C63/0021—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor characterised by the choice of the material with coherent impregnated reinforcing layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
  • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
  • B29C63/04—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like
  • B29C63/08—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like by winding helically
  • B29C63/10—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like by winding helically around tubular articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
  • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
  • B29C70/28—Shaping operations therefor
  • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
  • B29C70/32—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core on a rotating mould, former or core
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
  • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
  • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
  • B29K2105/0872—Prepregs
  • B29K2105/089—Prepregs fabric
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2307/00—Use of elements other than metals as reinforcement
  • B29K2307/04—Carbon
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/712—Containers; Packaging elements or accessories, Packages
  • B29L2031/7154—Barrels, drums, tuns, vats
  • B29L2031/7156—Pressure vessels
• • 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
  • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
  • B32B2260/02—Composition of the impregnated, bonded or embedded layer
  • B32B2260/021—Fibrous or filamentary layer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
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  • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
  • B32B2260/04—Impregnation, embedding, or binder material
  • B32B2260/046—Synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • 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
  • B32B2262/10—Inorganic 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
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B2305/00—Condition, form or state of the layers or laminate
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B2439/00—Containers; Receptacles
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• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
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• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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  • F17C2221/01—Pure fluids
  • F17C2221/012—Hydrogen
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2270/00—Applications
  • F17C2270/01—Applications for fluid transport or storage
  • F17C2270/0165—Applications for fluid transport or storage on the road
  • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2270/00—Applications
  • F17C2270/01—Applications for fluid transport or storage
  • F17C2270/0165—Applications for fluid transport or storage on the road
  • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
  • F17C2270/0171—Trucks
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2270/00—Applications
  • F17C2270/01—Applications for fluid transport or storage
  • F17C2270/0165—Applications for fluid transport or storage on the road
  • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
  • F17C2270/0173—Railways
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2270/00—Applications
  • F17C2270/01—Applications for fluid transport or storage
  • F17C2270/0165—Applications for fluid transport or storage on the road
  • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
  • F17C2270/0178—Cars
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2270/00—Applications
  • F17C2270/01—Applications for fluid transport or storage
  • F17C2270/0165—Applications for fluid transport or storage on the road
  • F17C2270/0184—Fuel cells
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02E60/30—Hydrogen technology
  • Y02E60/32—Hydrogen storage
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
  • Y02P90/45—Hydrogen technologies in production processes

Definitions

• TITLE MULTI-LAYER STRUCTURE FOR THE TRANSPORT OR STORAGE OF
• the present patent application relates to composite multilayer structures for the transport, distribution or storage of hydrogen, in particular for the distribution or storage of hydrogen, and their manufacturing process.
• Hydrogen tanks are a subject that is currently attracting a lot of interest from many manufacturers, especially in the automotive field.
• One of the goals is to offer vehicles that pollute less and less.
• electric or hybrid vehicles comprising a battery aim to gradually replace thermal vehicles, such as gasoline or diesel vehicles.
• thermal vehicles such as gasoline or diesel vehicles.
• the battery is a relatively complex component of the vehicle.
• the electric vehicle still suffers today from several problems, namely the autonomy of the battery, the use in these rare earth batteries whose resources are not inexhaustible, recharging times much longer than the durations. tank filling, as well as a problem of electricity production in the different countries to be able to recharge the batteries.
• Hydrogen therefore represents an alternative to the electric battery since hydrogen can be transformed into electricity by means of a fuel cell and thus power electric vehicles.
• Hydrogen tanks generally consist of a metal casing (liner or sealing layer) which must prevent the permeation of hydrogen.
• liner or sealing layer One of the types of tanks being considered, called Type IV, is based on a thermoplastic liner around which a composite is wrapped.
• thermoplastic resin liner or sealing sheath
• a reinforcing structure made up of fibers (glass, aramid, carbon) coated in a thermoplastic or thermosetting matrix, also called sheath or reinforcing layer, which makes it possible to work at much higher pressures while reducing the mass and avoiding the risks of explosive rupture in the event of severe external attacks.
• the permeability of the liner is indeed a key factor in limiting hydrogen losses from the tank;
• the first generation of type IV tanks used a liner based on high density polyethylene (HDPE).
• HDPE high density polyethylene
• HDPE has the drawback of having too low a melting temperature and high hydrogen permeability, which is a problem with the new thermal withstand requirements and does not allow the filling speed of the tank to be increased. tank.
• PA6 polyamide
• WO1 8155491 describes a hydrogen transport component having a three-layer structure, the inner layer of which is a composition consisting of PA11, 15 to 50% of an impact modifier and 1 to 3% of plasticizer or without plasticizer which exhibits hydrogen barrier properties, good flexibility and durability at low temperature.
• this structure is suitable for pipes for transporting hydrogen but not for storing hydrogen.
• the inventors have therefore unexpectedly found that the use of a semi-crystalline polyamide thermoplastic polymer P1i, in particular with a short or long chain, comprising a limited proportion of impact modifier and plasticizer, for the sealing layer, with a semi-crystalline thermoplastic polymer P2j for the matrix of the composite, said composite being welded to the waterproofing layer, and the two polymers P1i and P2j of the waterproofing layer adjacent to the composite reinforcing layer differing in their number d 'carbon atom per amide function of at most 20%, made it possible to obtain a structure suitable for the transport, distribution or storage of hydrogen, and in particular for the storage of hydrogen as well as a increase in the maximum temperature of use up to 120 ° C, thus making it possible to increase the speed of filling the tanks.
• multilayer structure is meant a tank comprising or consisting of several layers, namely several sealing layers and several reinforcing layers, or one sealing layer and several reinforcing layers, or several sealing layers and a backing layer or a waterproofing layer and a backing layer.
• the multilayer structure is therefore meant to the exclusion of a pipe or tube.
• Poly ether block amide are copolymers with amide units (Ba1) and polyether units (Ba2), said amide unit (Ba1) corresponding to an aliphatic repeating unit chosen from a unit obtained from at least one amino acid or a unit obtained from at least one lactam, or an XY unit obtained from polycondensation:
• diamine being preferably chosen from a linear or branched aliphatic diamine or a mixture thereof, and
• said dicarboxylic acid being preferably chosen from: a linear or branched aliphatic dicacid, or a mixture of these, said diamine and said dicacid comprising from 4 to 36 carbon atoms, advantageously from 6 to 18 carbon atoms; said polyether units (Ba2) being in particular derived from at least one polyalkylene ether polyol, in particular a polyalkylene ether diol.
• said constituent composition of said sealing layer is devoid of a nucleating agent.
• Nucleating agents are known to those skilled in the art and refer to a substance which, when incorporated into a polymer, forms nuclei for crystal growth in the molten polymer.
• They can be chosen, for example, from micro talc, carbon black, silica, titanium dioxide and nanoclays.
• said constituent composition of said sealing layer is devoid of nucleating agent and plasticizer.
• said structure is also devoid of an outermost layer and adjacent to the outermost layer of polyamide polymer composite reinforcement.
• said multilayer structure consists of only two layers, a waterproofing layer and a reinforcing layer.
• the waterproofing layer or layers are the innermost layers compared to the composite reinforcing layers which are the outermost layers.
• the tank can be a tank for the mobile storage of hydrogen, i.e. on a truck for transporting hydrogen, on a car for transporting hydrogen.
• hydrogen and the hydrogen supply of a fuel cell for example, on a train for the supply of hydrogen or on a drone for the supply of hydrogen, but it can also be a stationary storage tank of the 'hydrogen in station for the distribution of hydrogen to vehicles.
• the sealing layer (1) is impermeable to hydrogen at 23 ° C, that is to say that the permeability to hydrogen at 23 ° C is less than 500 cc.mm/m2. 24h. .atm at 23 ° C under 0% relative humidity (RH).
• P1i thermoplastic polyamide polymer
• i 1 to n
• n being the number of sealing layers, semi-crystalline, excluding a polyether block amide (PEBA), and excluding PA11.
• PEBA polyether block amide
• the composite reinforcing layer (s) is (are) wound (s) around the waterproofing layer by means of tapes (or tapes or rovings) of fibers impregnated with polymer which are deposited, for example, by filament winding.
• the polymers may be different.
• the polymers of the reinforcing layers are identical, there may be several layers present, but advantageously, only one reinforcing layer is present and which then has at least one complete winding around the waterproofing layer. Even if only one layer is present, several successive complete windings around the waterproofing layer can be made and constitute said single layer.
• the other composite reinforcement layers also adhere to each other.
• the other waterproofing layers also adhere to each other.
• a waterproofing layer and a reinforcing layer are present and are welded to each other.
• One or more waterproofing layers may or may be present.
• the term “predominantly” means that said at least one polymer is present in more than 50% by weight relative to the total weight of the composition.
• said at least one major polymer is present at more than 60% by weight, in particular at more than 70% by weight, particularly at more than 80% by weight, more particularly greater than or equal to 90% by weight, relative to the weight total composition.
• Said composition can also comprise up to 50% by weight relative to the total weight of the composition of impact modifiers and / or a plasticizer and / or additives.
• the additives can be selected from another polymer, an antioxidant, a heat stabilizer, a UV absorber, a light stabilizer, a lubricant, an inorganic filler, a flame retardant, a colorant, carbon black and carbonaceous nanofillers, in particular the additives are chosen from an antioxidant, a heat stabilizer, a UV absorber, a light stabilizer, a lubricant, an inorganic filler, a flame retardant, a colorant, carbon black and carbon nanofillers.
• the nucleating agents are excluded from the additives.
• nucleating agents are excluded from the additives and in this case the composition is also devoid of plasticizer.
• Said other polymer can be another semi-crystalline thermoplastic polymer or a different polymer and in particular an EVOH (Ethylene vinyl alcohol).
• EVOH Ethylene vinyl alcohol
• said composition comprises mainly said thermoplastic PU polymer, from 0 to 50% by weight of impact modifier, in particular from 0 to less than 15% of impact modifier, in particular from 0 to 12% of impact modifier, from 0 to 1, 5% plasticizer and 0 to 5% by weight of additives, the sum of the constituents of the composition being equal to 100%.
• said composition consists predominantly of said thermoplastic PU polymer, from 0 to 50% by weight of impact modifier, in particular from 0 to less than 15% of impact modifier, in particular from 0 to 12% of impact modifier, from 0 to 1 , 5% plasticizer and from 0 to 5% by weight of additives, the sum of the constituents of the composition being equal to 100%.
• said composition comprises mainly said thermoplastic PU polymer, from 0 to 50% by weight of impact modifier, in particular from 0 to less than 15% of impact modifier, in particular from 0 to 12% of impact modifier, from 0 to 1, 5% plasticizer and 0 to 5% by weight of additives, excluding a nucleating agent, the sum of the constituents of the composition being equal to 100%.
• said composition consists of said thermoplastic polymer P1i predominantly, from 0 to 50% by weight of impact modifier, in particular from 0 to less than 15% of impact modifier, in particular from 0 to 12% of impact modifier, from 0 to 1 , 5% of plasticizer and from 0 to 5% by weight of additives, excluding a nucleating agent, the sum of the constituents of the composition being equal to 100%.
• said composition comprises said thermoplastic polymer P1i predominantly, from 0 to 50% by weight of impact modifier, in particular from 0 to less than 15% of impact modifier, in particular from 0 to 12% of impact modifier and from 0 to 5% by weight of additives, excluding a nucleating agent and excluding plasticizer, the sum of the constituents of the composition being equal to 100%.
• said composition consists of said thermoplastic polymer P1i predominantly, from 0 to 50% by weight of impact modifier, in particular from 0 to less than 15% of impact modifier, in particular from 0 to 12% of impact modifier and from 0 to 5 % by weight of additives, excluding a nucleating agent, and excluding plasticizer, the sum of the constituents of the composition being equal to 100%.
• Said at least one majority polymer of each layer may be identical or different.
• a single major polymer is present at least in the sealant layer which adheres to the composite backing layer.
• said composition comprises an impact modifier of 0.1 to 50% by weight, in particular from 0.1 to less than 15% by weight, in particular from 0.1 to 12% by weight of impact modifier by relative to the total weight of the composition.
• said composition is devoid of plasticizer.
• said composition comprises an impact modifier of 0.1 to 50% by weight, in particular from 0.1 to less than 15% by weight, in particular from 0.1 to 12% by weight of impact modifier and said composition is devoid of plasticizer relative to the total weight of the composition.
• said composition comprises an impact modifier of 0.1 to 50% by weight, in particular from 0.1 to less than 15% by weight, and from 0.1 to 1.5% by weight of plasticizer relative to the total weight of the composition.
• thermoplastic or semi-crystalline polyamide thermoplastic polymer
• Tg glass transition temperature
• Tm melting temperature
• Tg, Te and Tf are determined by differential scanning calorimetry (DSC) according to standard 11357-2: 2013 and 11357-3: 2013 respectively.
• the number-average molecular mass Mn of said semi-crystalline polyamide thermoplastic polymer is preferably in a range going from 10,000 to 85,000, in particular from 10,000 to 60,000, preferably from 10,000 to 50,000, even more preferably from 12,000 to 50,000. These Mn values may correspond to inherent viscosities greater than or equal to 0.8 as determined in m-cresol according to standard ISO 307: 2007 but by changing the solvent (use of m-cresol instead of sulfuric acid and the temperature being of 20 ° C).
• the polyamide can be a homopolyamide or a copolyamide or a mixture thereof.
• said thermoplastic polymer is a short-chain semi-crystalline aliphatic polyamide, that is to say a polyamide having an average number of carbon atoms per nitrogen atom of up to 9, or a long-chain aliphatic polyamide, that is to say a polyamide having an average number of carbon atoms per nitrogen atom greater than 9, preferably greater than 10.
• the short-chain aliphatic polyamide is chosen from: PA6, a PA610, a PA612 and a PA6 / polyolefin mixture
• the long-chain aliphatic polyamide is chosen from: polyamide 11 (PA11), polyamide 12 (PA12), polyamide 1010 (PA1010), polyamide 1012 (PA1012), polyamide 1212 (PA1012), or a mixture thereof or a copolyamide thereof, in particular PA11 and PA12.
• the long chain aliphatic polyamide is chosen from: polyamide 12 (PA12), polyamide 1010 (PA1010), polyamide 1012 (PA1012), polyamide 1212 (PA1012), or a mixture of these- ci or a copolyamide thereof, in particular PA12.
• said semi-crystalline polyamide thermoplastic polymer is a semi-crystalline semi-aromatic polyamide, in particular a polyamide.
• semi-aromatic semi-crystalline having an average number of carbon atoms per nitrogen atom greater than 8, preferably greater than 9 and a melting point of between 240 ° C and less than 280 ° C.
• the semi-crystalline polyamides are semi-aromatic polyamides, in particular a semi-aromatic polyamide of formula X / YAr, as described in EP1505099, in particular a semi-aromatic polyamide of formula A / XT in which A is chosen from a unit obtained from an amino acid, a unit obtained from a lactam and a unit corresponding to the formula (diamine in Ca).
• (Cb diacid) with a representing the number of carbon atoms of the diamine and b representing the number of carbon atoms of the diacid, a and b each being between 4 and 36, advantageously between 9 and 18, the unit (Ca diamine) being chosen from aliphatic, linear or branched diamines, cycloaliphatic diamines and alkylaromatic diamines and the unit (Cb diacid) being chosen from aliphatic, linear or branched diacids, cycloaliphatic diacids and aromatic diacids ;
• XT denotes a unit obtained from the polycondensation of a Cx diamine and terephthalic acid, with x representing the number of carbon atoms of the Cx diamine, x being between 5 and 36, advantageously between 9 and 18, in particular a polyamide of formula A / 5T, A / 6T, A / 9T, A / 10T or A / 11 T, A being as defined above, in particular a polyamide chosen from a PA MPMDT / 6T, one PA11 / 10T, one PA 5T / 10T, one PA 11 / BACT, one PA 11 / 6T / 10T, one PA MXDT / 10T, one PA MPMDT / 10T, one PA BACT / 10T, one PA BACT / 6T, PA BACT / 10T / 6T, one PA 11 / BACT / 6T, PA 11 / MPMDT / 10T, PA 11 / B
• the semi-aromatic semi-crystalline polyamide is chosen from polyamide 11 / 5T or 11 / 6T or 11 / 10T, MXDT / 10T, MPMDT / 10T and BACT / 10T.
• T is terephthalic acid
• MXD is m-xylylenediamine
• MPMD is methylpentamethylene diamine
• BAC is bis (aminomethyl) cyclohexane.
• Said semi-aromatic polyamides defined above have in particular a Tg greater than or equal to 80 ° C.
• each waterproofing layer consists of a composition comprising the same type of polyamide.
• Said composition comprising said polymer P1i may be black in color and capable of absorbing radiation suitable for the welding which is then carried out after winding the composite reinforcing layer around the waterproofing layer.
• soldering elements made of thermoplastic polyamide polymer.
• thermoplastic polyamide polymer thermoplastic polyamide polymer
• the welding of elements made of thermoplastic polyamide polymer, in particular by laser welding may require that the two elements to be welded have different properties with respect to radiation, in particular laser: one of the elements must be transparent to radiation, in particular laser , and the other must absorb radiation including laser.
• the radiation, in particular laser passes through the transparent element and then reaches the absorbent element, where it is converted into heat. This makes it possible to melt the contact zone between the two elements and therefore to carry out the weld.
• the preferred case is a fusion of the interface at the time of removal.
• the welding is carried out by a system chosen from among the laser, infrared heating (IR), heating by led, heating by induction or by weight or high frequency (HF) heating.
• IR infrared heating
• HF high frequency
• the PU composition comprises carbonaceous fillers.
• the PU composition comprises metal particles.
• the welding is carried out by a laser system.
• the impact modifier can be any impact modifier from the moment when a polymer of lower modulus than that of the resin, exhibiting good adhesion with the matrix, so as to dissipate the cracking energy.
• the impact modifier is advantageously constituted by a polymer having a flexural modulus of less than 100 MPa measured according to the ISO 178 standard and of Tg less than 0 ° C (measured according to the 11357-2 standard at the inflection point of the DSC thermogram ), in particular a polyolefin.
• PEBAs are excluded from the definition of impact modifiers.
• the polyolefin of the impact modifier can be functionalized or non-functionalized or be a mixture of at least one functionalized and / or at least one non-functionalized.
• the polyolefin has been designated by (B) and functionalized polyolefins (B1) and unfunctionalized polyolefins (B2) have been described below.
• An unfunctionalized polyolefin (B2) is conventionally a homopolymer or copolymer of alpha olefins or diolefins, such as, for example, ethylene, propylene, butene-1, octene-1, butadiene.
• alpha olefins or diolefins such as, for example, ethylene, propylene, butene-1, octene-1, butadiene.
• LDPE low density polyethylene
• HDPE high density polyethylene
• LLDPE linear low density polyethylene, or linear low density polyethylene
• VLDPE very low density polyethylene, or very low density polyethylene
• metallocene polyethylene metallocene polyethylene
• ethylene / alpha-olefin copolymers such as ethylene / propylene, EPR (abbreviation of ethylene-propylene-rubber) and ethylene / propylene / diene (EPDM).
• EPR abbreviation of ethylene-propylene-rubber
• EPDM ethylene / propylene / diene
• SEBS ethylene-butene / styrene
• SBS styrene / butadiene / styrene
• SIS styrene / isoprene / styrene
• SEPS styrene / ethylene-propylene / styrene
• the functionalized polyolefin (B1) can be a polymer of alpha olefins having reactive units (the functionalities); such reactive units are acid, anhydride or epoxy functions.
• polyolefins (B2) grafted or co- or ter polymerized with unsaturated epoxides such as glycidyl (meth) acrylate, or with carboxylic acids or the corresponding salts or esters such as (meth) acrylic acid (the latter being able to be totally or partially neutralized by metals such as Zn, etc.) or alternatively by carboxylic acid anhydrides such as maleic anhydride.
• a functionalized polyolefin is for example a PE / EPR mixture, the weight ratio of which can vary widely, for example between 40/60 and 90/10, said mixture being co-grafted with an anhydride, in particular maleic anhydride, according to a degree of grafting, for example from 0.01 to 5% by weight.
• the functionalized polyolefin (B1) can be chosen from the following (co) polymers, grafted with maleic anhydride or glycidyl methacrylate, in which the degree of grafting is for example from 0.01 to 5% by weight:
• - ethylene / alpha-olefin copolymers such as ethylene / propylene, EPR (abbreviation of ethylene-propylene-rubber) and ethylene / propylene / diene (EPDM).
• EPR abbreviation of ethylene-propylene-rubber
• EPDM ethylene / propylene / diene
• SEBS ethylene-butene / styrene
• SBS styrene / butadiene / styrene
• SIS isoprene / styrene
• SEPS styrene / ethylene-propylene / styrene
• alkyl (meth) acrylate copolymers containing up to 40% by weight of alkyl (meth) acrylate;
• the functionalized polyolefin (B1) can also be chosen from ethylene / propylene copolymers predominantly in propylene grafted with maleic anhydride then condensed with mono-amine polyamide (or a polyamide oligomer) (products described in EP-A-0342066) .
• the functionalized polyolefin (B1) can also be a co- or ter polymer of at least the following units: (1) ethylene, (2) alkyl (meth) acrylate or vinyl ester of saturated carboxylic acid and (3) anhydride such as maleic anhydride or (meth) acrylic acid or epoxy such as glycidyl (meth) acrylate.
• (meth) acrylic acid can be salified with Zn or Li.
• alkyl (meth) acrylate in (B1) or (B2) denotes methacrylates and acrylates of C1 to C8 alkyl, and may be chosen from methyl acrylate, ethyl acrylate , n-butyl acrylate, isobutyl acrylate, ethyl-2-hexyl acrylate, cyclohexyl acrylate, methyl methacrylate and ethyl methacrylate.
• the aforementioned polyolefins (B1) can also be crosslinked by any suitable process or agent (diepoxy, diacid, peroxide, etc.); the term functionalized polyolefin also includes mixtures of the aforementioned polyolefins with a difunctional reagent such as as diacid, dianhydride, diepoxy, etc. capable of reacting with these or mixtures of at least two functionalized polyolefins capable of reacting with each other.
• a difunctional reagent such as as diacid, dianhydride, diepoxy, etc.
• copolymers mentioned above, (B1) and (B2) can be copolymerized in a random or block fashion and have a linear or branched structure.
• the molecular weight, the MFI number, the density of these polyolefins can also vary to a large extent, which will be appreciated by those skilled in the art.
• MFI short for Melt Flow Index, is the melt flow index. It is measured according to standard ASTM 1238.
• the unfunctionalized polyolefins (B2) are chosen from homopolymers or copolymers of polypropylene and any homopolymer of ethylene or copolymer of ethylene and of a comonomer of higher alpha olefinic type. such as butene, hexene, octene or 4-methyl 1-Pentene.
• PPs high density PE, medium density PE, linear low density PE, low density PE, very low density PE.
• polyethylenes are known to those skilled in the art as being produced according to a “radical” process, according to a “Ziegler” type catalysis or, more recently, according to a so-called “metallocene” catalysis.
• the functionalized polyolefins (B1) are chosen from any polymer comprising alpha olefinic units and units bearing polar reactive functions such as epoxy, carboxylic acid or carboxylic acid anhydride functions.
• polymers mention may be made of the ter polymers of ethylene, of alkyl acrylate and of maleic anhydride or of glycidyl methacrylate, such as Lotader® from the Applicant or polyolefins grafted with l.
• maleic anhydride such as Orevac® from the Applicant as well as ter polymers of ethylene, of alkyl acrylate and of (meth) acrylic acid.
• Mention may also be made of homopolymers or copolymers of polypropylene grafted with a carboxylic acid anhydride and then condensed with polyamides or mono-amino polyamide oligomers.
• said constituent composition of said sealant layer or layers is devoid of polyether block amide (PEBA).
• PEBAs are therefore excluded from the impact modifiers.
• said transparent composition is devoid of core-shell particles or “core-shell” core-shell polymers.
• core-shell particle it is necessary to understand a particle of which the first layer forms the core and the second or all of the following layers form the respective shell.
• the core-shell particle can be obtained by a multi-step process comprising at least two steps. Such a method is described for example in documents US2009 / 0149600 or EP0722961. Regarding the plasticizer
• the plasticizer can be a plasticizer commonly used in compositions based on polyamide (s).
• a plasticizer which has good thermal stability so that no fumes are formed during the stages of mixing the various polymers and of processing the composition obtained.
• this plasticizer can be chosen from: benzene sulfonamide derivatives such as n-butyl benzene sulfonamide (BBSA), ortho and para isomers of ethyl toluene sulfonamide (ETSA), N-cyclohexyl toluene sulfonamide and N- (2-hydroxypropyl) benzenesulfonamide (HP-BSA), esters of hydroxybenzoic acids such as 2-ethylhexyl para-hydroxybenzoate
• BBSA n-butyl benzene sulfonamide
• ETSA ethyl toluene sulfonamide
• HP-BSA N- (2-hydroxypropyl) benzenesulfonamide
• esters of hydroxybenzoic acids such as 2-ethylhexyl para-hydroxybenzoate
• EHPB 2-decylhexyl para-hydroxybenzoate
• HDPB 2-decylhexyl para-hydroxybenzoate
• esters or ethers of tetrahydrofurfuryl alcohol such as oligoethyleneoxy-tetrahydrofurfurylalcohol
• esters of citric acid or hydroxymalonic acid such as oligoethylene oxymalonate.
• a preferred plasticizer is n-butyl benzene sulfonamide (BBSA).
• Another more particularly preferred plasticizer is N- (2-hydroxy-propyl) benzene sulfonamide (HP-BSA).
• HP-BSA N- (2-hydroxy-propyl) benzene sulfonamide
• the polymer P2j is a semi-crystalline polyamide thermoplastic polymer, said semi-crystalline polyamide thermoplastic polymer having the same definition as above.
• One or more composite reinforcement layers may or may be present.
• said at least one polymer is present in more than 50% by weight relative to the total weight of the composition and of the matrix of the composite.
• said at least one majority polymer is present at more than 60% by weight, in particular at more than 70% by weight, particularly at more than 80% by weight, more particularly greater than or equal to 90% by weight, relative to the total weight of the composition,
• Said composition can also comprise impact modifiers and / or additives.
• the additives can be selected from an antioxidant, a heat stabilizer, a UV absorber, a light stabilizer, a lubricant, an inorganic filler, a flame retardant, a plasticizer and a colorant.
• the additives are excluding a nucleating agent.
• said composition comprises said thermoplastic polyamide polymer P2j predominantly, from 0 to 15% by weight of impact modifier, in particular from 0 to 12% by weight of impact modifier, from 0 to 5% by weight of additives, the sum of constituents of the composition being equal to 100% by weight.
• said composition comprises said thermoplastic polyamide polymer P2j predominantly, from 0 to 15% by weight of impact modifier, in particular from 0 to 12% by weight of impact modifier, from 0 to 5% by weight of additives, to the exclusion of a nucleating agent, the sum of the constituents of the composition being equal to 100% by weight.
• said composition consists of said thermoplastic polyamide polymer P2j predominantly, from 0 to 15% by weight of impact modifier, in particular from 0 to 12% by weight of impact modifier, from 0 to 5% by weight of additives, the sum of the constituents of the composition being equal to 100% by weight.
• said composition consists of said thermoplastic polyamide polymer P2j predominantly, from 0 to 15% by weight of impact modifier, in particular from 0 to 12% by weight of impact modifier, from 0 to 5% by weight of additives, at l exclusion of a nucleating agent, the sum of the constituents of the composition being equal to 100% by weight.
• each reinforcing layer may be identical or different.
• each reinforcing layer comprises the same type of polyamide.
• thermoplastic, or semi-crystalline polyamide thermoplastic polymer is understood to mean a material which is generally solid at room temperature, and which softens during an increase in temperature, in particular after passing its glass transition temperature (Tg), and which may exhibit a straightforward melting at the passage of its so-called melting temperature (Tm), and which becomes solid again when the temperature drops below its crystallization temperature.
• Tg, Te and Tf are determined by differential scanning calorimetry (DSC) according to standard 11357-2: 2013 and 11357-3: 2013 respectively.
• the number-average molecular weight Mn of said thermoplastic polyamide polymer P2j is preferably in a range from 10,000 to 40,000, preferably from 10,000 to 30,000. These Mn values may correspond to inherent viscosities greater than or equal to 0.8 as determined. in m-cresol according to standard ISO 307: 2007 but by changing the solvent (use of m-cresol in place of sulfuric acid and the temperature being 20 ° C).
• the polyamide can be a homopolyamide or a copolyamide or a mixture thereof.
• said thermoplastic polymer is a short-chain semi-crystalline aliphatic polyamide, that is to say a polyamide having an average number of carbon atoms per nitrogen atom of up to 9, or a long-chain aliphatic polyamide, that is to say a polyamide having an average number of carbon atoms per nitrogen atom greater than 9, preferably greater than 10.
• the short-chain aliphatic polyamide is chosen from: PA6, a PA610, a PA612 and a PA6 / polyolefin mixture
• the long-chain aliphatic polyamide is chosen from: polyamide 11 (PA11), polyamide 12 (PA12), polyamide 1010 (PA1010), polyamide 1012 (PA1012), polyamide 1212 (PA1012), or a mixture thereof or a copolyamide thereof, in particular PA11 and PA12.
• the long chain aliphatic polyamide is chosen from: polyamide 12 (PA12), polyamide 1010 (PA1010), polyamide 1012 (PA1012), polyamide 1212 (PA1012), or a mixture of these- ci or a copolyamide thereof, in particular PA12.
• said semi-crystalline polyamide thermoplastic polymer is a semi-aromatic semi-crystalline polyamide, in particular a semi-aromatic semi-crystalline polyamide having an average number of carbon atoms per nitrogen atom greater than 8 preferably greater than 9 and a melting temperature of between 240 ° C to less than 280 ° C.
• the semi-crystalline polyamides are semi-aromatic polyamides, in particular a semi-aromatic polyamide of formula X / YAr, as described in EP1505099, in particular a semi-aromatic polyamide of formula A / XT in which A is chosen from a unit obtained from an amino acid, a unit obtained from a lactam and a unit corresponding to the formula (diamine in Ca).
• the unit (diacid in Cb) being chosen from aliphatic diamines, linear or branched, cycloaliphatic diamines and alkylaromatic diamines and the unit (Cb diacid) being chosen from aliphatic, linear or branched diacids, cycloaliphatic diacids and aromatic diacids;
• XT denotes a unit obtained from the polycondensation of a Cx diamine and terephthalic acid, with x representing the number of carbon atoms of the Cx diamine, x being between 5 and 36, advantageously between 9 and 18, in particular a polyamide of formula A / 5T, A / 6T, A / 9T, A / 10T or A / 11 T, A being as defined above, in particular a polyamide chosen from a PA MPMDT / 6T, one PA11 / 10T, one PA 5T / 10T, one PA 11 / BACT, one PA 11 / 6T / 10T, one PA MXDT / 10T, one PA MPMDT / 10T, one PA BACT / 10T, one PA BACT / 6T, PA BACT / 10T / 6T, one PA 11 / BACT / 6T, PA 11 / MPMDT / 6T,
• PA 11 / MP M DT / 10T PA 11 / BACT / 10T, one PA 11 / MXDT / 10T, one 11 / 5T / 10T.
• the semi-aromatic semi-crystalline polyamide is chosen from polyamide 11 / 5T or 11 / 6T or 11 / 10T, MXDT / 10T, MPMDT / 10T and BACT / 10T.
• T is terephthalic acid
• MXD is m-xylylenediamine
• MPMD is methylpentamethylene diamine
• BAC is bis (aminomethyl) cyclohexane.
• Said semi-aromatic polyamides defined above have in particular a Tg greater than or equal to 80 ° C.
• Said multilayer structure therefore comprises at least one waterproofing layer and at least one composite reinforcing layer, the innermost reinforcing layer being welded to the outermost waterproofing layer and which therefore adhere to each other.
• the Tm, as measured according to ISO 11357-3: 2013, of the polyamide of said outermost adjacent sealing layer (1) differs from that of the polyamide of said outermost reinforcing layer (2). internal at most 30 ° C.
• the Tg, as measured according to ISO 11357-2: 2013, of the polyamide of said outermost adjacent sealing layer (1) differs from that of the polyamide of said reinforcing layer (2). more internal at most 30 ° C.
• the Tm, and the Tg of the polyamide of said outermost adjacent sealing layer (1) differ from that of the polyamide of said innermost reinforcing layer (2) at most 30 ° C.
• each sealing layer comprises the same type of polyamide and each reinforcing layer comprises the same type of polyamide.
• Said multilayer structure can include up to 10 sealing layers and up to
• said multilayer structure is not necessarily symmetrical and that it can therefore include more waterproofing layers than composite layers or vice versa, but there cannot be alternation of layers and of reinforcing layer.
• said multilayer structure comprises one, two, three, four, five, six, seven, eight, nine or ten sealing layers and one, two, three, four, five, six, seven, eight, nine or ten layers composite reinforcement.
• said multilayer structure comprises one, two, three, four or five waterproofing layers and one, two, three, four or five composite reinforcement layers.
• said multilayer structure comprises one, two or three waterproofing layers and one two or three composite reinforcement layers.
• said multilayer structure comprises a single waterproofing layer and several reinforcing layers, said adjacent reinforcing layer being welded to said waterproofing layer and the other reinforcing layers being wrapped around the reinforcing layer directly. adjacent.
• said multilayer structure comprises a single reinforcing layer and several sealing layers, said reinforcing layer being welded to said adjacent sealing layer.
• said multilayer structure comprises a single waterproofing layer and a single composite reinforcing layer, said reinforcing layer being welded to said waterproofing layer.
• each sealing layer consists of a composition comprising the same type of polyamide PU polymer.
• the polyamide PU is identical for all the waterproofing layers.
• said PU polymer is a short-chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612 and a PA6 / polyolefin mixture, or a long-chain mixture, in particular chosen from a PA1010, PA1012, PA1212, PA11 and PA12, in particular PA 11 and PA12, or a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11 / 10T, MXDT / 10T, MPMDT / 10T and BACT / 10T.
• each reinforcing layer consists of a composition comprising the same type of polyamide polymer P2j.
• the P2j polyamide is identical for all the reinforcing layers.
• said polymer P2j is a short-chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612, or a long-chain one, in particular chosen from a PA1010, PA1012, PA1212, PA11 and PA12, in particular PA 11 and PA12, or a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11 / 10T, MXDT / 10T, MPMDT / 10T and BACT / 10T.
• each sealing layer consists of a composition comprising the same type of polyamide polymer P1i and each reinforcing layer consists of a composition comprising the same type of polyamide polymer P2j.
• said polymer P1i is a short-chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612 and a PA6 / polyolefin mixture, or a long-chain mixture, in particular chosen from a PA1010, PA1012, PA1212, PA11 and PA12, in particular PA 11 and PA12, or a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11 / 10T, MXDT / 10T, MPMDT / 10T and BACT / 10T and said polymer P2j is a short-chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612, or a long-chain polyamide, in particular chosen from a PA1010, PA1012, PA1212, PA11 and PA12, in particular PA 11 and PA12, or a semi-polyamide aromatic, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11
• said multilayer structure consists of a single reinforcing layer and a single sealing layer in which said polymer P1i is a short-chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612 and a PA6 / polyolefin mixture, or a long chain mixture, in particular chosen from a PA1010, PA1012, PA1212, PA11 and PA12, in particular PA 11 and PA12, or a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T,
• polymer P2j is a short chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612, or a long chain one, in particular chosen from a PA1010, PA1012, PA1212, PA11 and PA12, in particular PA 11 and PA12, or a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11/1 OT, MXDT / 10T, MPMDT / 10T and BACT / 10T.
• a short chain aliphatic polyamide in particular chosen from a PA6, a PA610, a PA612, or a long chain one, in particular chosen from a PA1010, PA1012, PA1212, PA11 and PA12, in particular PA 11 and PA12, or a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11/1 OT, MXDT / 10T, MPMDT / 10T and BACT / 10T.
• said multilayer structure consists of a single reinforcing layer and a single sealing layer in which said polymer P1i is a short-chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612 and a PA6 / polyolefin mixture, and said polymer P2j is a short-chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612.
• said multilayer structure consists of a single reinforcing layer and a single sealing layer in which said polymer P1i is a short-chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612 and a PA6 / polyolefin mixture, and said polymer P2j is a polyamide long chain aliphatic, in particular chosen from a PA1010, PA1012, PA1212,
• PA11 and PA12 in particular PA 11 and PA12.
• said multilayer structure consists of a single reinforcing layer and a single sealing layer in which said polymer P1i is a short-chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612 and a PA6 / polyolefin mixture, and said polymer P2j is a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11/1 OT, MXDT / 10T, MPMDT / 10T and BACT / 10T .
• said polymer P1i is a short-chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612 and a PA6 / polyolefin mixture
• said polymer P2j is a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11/1 OT, MXDT / 10T, MPMDT / 10T and BACT / 10
• said multilayer structure consists of a single reinforcing layer and a single sealing layer in which said polymer P1i is a long-chain aliphatic polyamide, in particular chosen from a PA1010, PA1012, PA1212 , PA11 and PA12, in particular PA 11 and PA12, and said polymer P2j is a short-chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612.
• said multilayer structure consists of a single reinforcing layer and a single sealing layer in which said polymer P1i is a long-chain aliphatic polyamide, in particular chosen from a PA1010, PA1012, PA1212 , PA11 and PA12, in particular PA 11 and PA12, and said polymer P2j is a long-chain aliphatic polyamide, in particular chosen from a PA1010, PA1012, PA1212, PA11 and PA12, in particular PA 11 and PA12.
• said multilayer structure consists of a single reinforcing layer and a single sealing layer in which said polymer P1i is a long-chain aliphatic polyamide, in particular chosen from a PA1010, PA1012, PA1212 , PA11 and PA12, in particular PA 11 and PA12, and said polymer P2j is a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T,
• said multilayer structure consists of a single reinforcing layer and a single sealing layer in which said polymer P1i is a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11/1 OT, MXDT / 10T, MPMDT / 10T and BACT / 10T and said polymer P2j is a short-chain aliphatic polyamide, in particular chosen from a PA6, a PA610, a PA612.
• said multilayer structure consists of a single reinforcing layer and a single sealing layer in which said polymer P1i is a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11/1 OT, MXDT / 10T, MPMDT / 10T and BACT / 10T and said polymer P2j is a long-chain aliphatic polyamide, in particular chosen from a PA1010, PA1012, PA1212,
• said multilayer structure consists of a single reinforcing layer and a single sealing layer in which said PU polymer is a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11 / 10T, MXDT / 10T, MPMDT / 10T and BACT / 10T and said polymer P2j is a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11/1 OT, MXDT / 10T, MPMDT / 10T and BACT / 10T.
• said PU polymer is a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11 / 10T, MXDT / 10T, MPMDT / 10T and BACT / 10T
• said polymer P2j is a semi-aromatic polyamide, in particular chosen from polyamide 11 / 5T, 11 / 6T, 11/1 OT
• said multilayer structure further comprises at least one outer layer made of a continuous fiberglass fibrous material impregnated with a transparent amorphous polymer, said layer being the outermost layer of said multilayer structure.
• Said outer layer is a second but transparent reinforcing layer which makes it possible to put an inscription on the structure.
• constituent fibers of said fibrous material they are in particular fibers of mineral, organic or plant origin.
• said fibrous material can be sized or not sized.
• Said fibrous material can therefore comprise up to 3.5% by weight of an organic material (thermosetting or thermoplastic resin type) called sizing.
• fibers of mineral origin mention may be made of carbon fibers, glass fibers, basalt or basalt-based fibers, silica fibers, or silicon carbide fibers, for example.
• fibers of organic origin mention may be made of fibers based on a thermoplastic or thermosetting polymer, such as semi-aromatic polyamide fibers, aramid fibers or polyolefin fibers, for example.
• they are based on an amorphous thermoplastic polymer and have a glass transition temperature Tg greater than the Tg of the polymer or mixture of thermoplastic polymer constituting the pre-impregnation matrix when the latter is amorphous, or greater than the Tm of the polymer or mixture of thermoplastic polymer constituting the prepreg matrix when the latter is semi-crystalline.
• they are based on a semi-crystalline thermoplastic polymer and have a melting point Tm greater than the Tg of the polymer or mixture of thermoplastic polymer constituting the prepreg matrix when the latter is amorphous, or greater than the Tm. of the polymer or mixture of thermoplastic polymer constituting the prepreg matrix when the latter is semi-crystalline.
• the organic fibers constituting the fibrous material during impregnation with the thermoplastic matrix of the final composite.
• the fibers of plant origin mention may be made of natural fibers with base of flax, hemp, lignin, bamboo, silk, in particular spider silk, sisal, and other cellulose fibers, in particular viscose. These fibers of plant origin can be used pure, treated or else coated with a coating layer, with a view to facilitating the adhesion and the impregnation of the thermoplastic polymer matrix.
• the fibrous material can also be fabric, braided or woven with fibers.
• organic fibers can be mixed with mineral fibers to be pre-impregnated with thermoplastic polymer powder and to form the pre-impregnated fibrous material.
• the rovings of organic fibers can have several grammages. They can also have several geometries.
• the fibers constituting the fibrous material can also be in the form of a mixture of these reinforcing fibers of different geometries. Fibers are continuous fibers.
• the fibrous material is chosen from glass fibers, carbon fibers, basalt or basalt-based fibers, or a mixture of these, in particular carbon fibers.
• It is used as a wick or several wicks.
• the present invention relates to a method of manufacturing a multilayer structure as defined above, characterized in that it comprises a step of filament winding of the reinforcing layer as defined above around of the sealing layer as defined above.
• the tanks are obtained by rotational molding of the sealing layer (liner) at a temperature suitable for the nature of the thermoplastic resin used.
• thermoplastic resin (tape).
• This tape is deposited by filament winding using a robot comprising a 1500W power laser heater at a speed of 12m / min and there is no polymerization step.
• Type IV hydrogen storage tank composed of an epoxy composite reinforcement (Tg 100 ° C) T700SC31E carbon fibers (produced by Toray) and a PA11 waterproofing layer.
• Example 2 Type IV hydrogen storage tank, composed of a reinforcement in PA11 carbon fiber composite T700SC31 E (produced by T oray) and a sealing layer in PA11.
• the tanks thus obtained are subjected to cyclic pressure tests, varying between 10 and 800 bar. Water is used to apply pressure. The test is stopped after 10,000 cycles.

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• 2020
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