Method for integrating an inflation valve onto a part of an object inflatable by spraying

Abstract

Method of integrating an inflation valve onto a part of an inflatable object by spraying. Method of integrating an inflation valve (2) onto a piece of textile (1) comprising the following successive steps: supplying (E01): a piece of textile (1) having a deposition surface (101) having an orifice (102), an inflation valve (2) having a collar (204), at least one liquid composition to be sprayed comprising a binder dissolved in a solvent, and at least one filler to be sprayed consisting of loose fibers and / or a powder; immobilizing (E06) the inflation valve (2) on the deposition surface (101), the collar (204) being centered on the orifice (102) of the piece of textile (1);formation (E08) on the deposition surface (101) and on the flange (204) of the same airtight composite layer (7), consisting of a liquid composition and a filler resulting from the supply step (E01), this formation step (E08) comprising the following substeps: spraying (E09) on the deposition surface (101) and on the flange (204) of a liquid composition resulting from the supply step (E01); and spraying (E10) on the deposition surface (101) and on the flange (204) of a filler consisting of loose fibers and / or a powder resulting from the supply step (E01); the substep of spraying (E10) of a filler being simultaneous with or subsequent to the substep of spraying (E09) of the liquid composition; and drying (E11) of the composite layer (7) resulting from the formation step (E08). Figure to be published with the abbreviation: None;

Description

Title of the invention: Method for integrating an inflation valve onto a part of a spray-inflated object. TECHNICAL FIELD OF THE INVENTION

[0001] The technical field of the invention is that of the production of inflatable objects.

[0002] The present invention relates to a method for integrating an inflation valve on a part of an object that is spray-inflated, as well as a piece of textile equipped with an inflation valve and obtained by this process, and an inflatable object obtained from this piece of textile. TECHNOLOGICAL BACKGROUND OF THE INVENTION

[0003] Inflatable objects are generally equipped with an inflation valve, whether it is a small elastomeric inflation valve intended for inflation by mouth or a larger rigid inflation valve intended for inflation using a pump. Small elastomeric inflation valves are usually closed by a plug connected by a fastener to the valve body, the whole assembly being a single piece. Larger rigid inflation valves are usually closed by a rigid cap that screws onto the inflation port of the valve.

[0004] Inflation valves are usually glued or welded onto the inflatable object they are intended to equip. This gluing or welding must be very meticulous to prevent any air leakage at the inflation valve. Consequently, it can be a lengthy and costly operation, and pressure tests are generally necessary to ensure the absence of any air leakage at the inflation valve.

[0005] Nowadays, there is therefore a need for a method of integrating an inflation valve on an inflatable object which guarantees the absence of any air leakage at the inflation valve.

[0006] The main objective of the invention is therefore to improve the methods of integrating an inflation valve in order to meet this need.

[0007] Since there is also an urgent and growing need to reduce the environmental and ecological impact of industrial manufacturing processes, a secondary objective of the invention is also to improve the methods of integrating an inflation valve so that they are more environmentally friendly. Summary of the invention

[0008] In order to guarantee the absence of any air leakage at the inflation valve, the invention proposes a step of depositing a layer of composite material by spraying on a part of the inflation valve and the area of ​​the inflatable object where it is located, particularly at the interface between these two parts.

[0009] The invention offers a solution to the problem of reducing the environmental and ecological impact of processes for integrating an inflation valve onto an inflatable object by providing a sprayable composite material that meets, as far as possible, all of the following requirements: • use environmentally friendly and ecologically sound materials; • use materials derived from renewable natural raw materials; • use non-toxic materials, especially by contact and / or inhalation; • use as little as possible of materials obtained from fossil resources; • use recyclable and / or biodegradable materials; • use recycled materials; • use locally produced materials; • use a production process that generates little waste, this waste being reusable, recyclable and / or biodegradable.

[0010] In order to meet these requirements, following numerous studies, including feasibility studies, the applicant chose to primarily use bio-based fillers in the form of powder and / or fibers, a water-soluble binder, and a water-based solvent, and to adapt the spray manufacturing process accordingly. A bio-based material is defined as a material derived from renewable, non-fossil, natural organic raw materials of plant or animal origin.

[0011] One aspect of the invention relates to a method for integrating an inflation valve onto a piece of textile comprising the following successive steps: • supply E01 of a piece of textile, an inflation valve and at least one liquid composition and at least one sprayable charge, this supply step E01 comprising the following sub-steps: • supply E02 of a piece of textile having a deposition surface with an opening; • supply E03 of an inflation valve comprising a tubular valve body having an inflation orifice at one end and a base equipped with a collar at the opposite end, said collar having a diameter greater than that of the orifice of the textile piece; • supply E04 of at least one liquid composition comprising a binder and a solvent in which the binder is dissolved; • supply E05 of a charge consisting of loose fibers and / or a powder; • immobilization E06 of the inflation valve on the deposition surface with the collar centered on the orifice of the textile piece; • E08 formation on the deposition surface and on the flange of the same airtight composite layer, said composite layer being made up of a liquid composition and a filler resulting from the supply step E01, this E08 formation step comprising the following sub-steps: • spraying E09 onto the deposition surface and collar of a liquid composition resulting from the supply step E01; and • spraying E10 on the deposition surface and on the collar of a charge consisting of loose fibers and / or a powder resulting from the supply step E01; • the E10 spraying substep of a charge being simultaneous with or subsequent to the E09 spraying substep of the liquid composition; and • Drying El 1 of the composite layer resulting from the E08 formation step.

[0012] The term "textile component" used here refers to a flexible part used in the manufacture of an inflatable object, the latter being able to be manufactured from a single three-dimensional textile component, or by assembling several two-dimensional or three-dimensional textile components. The term "textile" is used here for any constituent material of an inflatable object that behaves substantially like a conventional textile used for the manufacture of such an object, even in the case where said textile component contains neither threads nor fibers.

[0013] The expression "spraying onto a layer or surface" means spraying onto the outer face of a layer or surface.

[0014] By "loose fibers" we mean loose fibers that are not bound together, or compacted, or oriented in any way, so that when sprayed, they are randomly arranged on the surface on which they are sprayed.

[0015] Spraying a liquid layer allows the binder to be deposited in all the gaps accessible from the outside and located between the collar of the inflation valve and the piece of textile in order to ensure that after drying of the binder no air leakage is possible at the inflation valve.

[0016] Spraying a filler allows the amount of binder needed to be reduced and the mechanical resistance of the waterproof composite layer obtained after the binder has dried to be increased.

[0017] If necessary, this process can be completed by spraying several waterproof composite layers, which advantageously improves the waterproofing and further strengthens the mechanical resistance of the resulting composite layer.

[0018] Spraying a water-based liquid layer onto or into which bio-based fibers and / or powder adhere significantly reduces the carbon footprint of the process. When the sprayed layer is thin, it also allows for rapid drying of each layer, without necessarily requiring heating and / or a vacuum, and without toxic or hazardous fumes.

[0019] In addition to being non-toxic, inexpensive and abundant, water has numerous and obvious advantages for the environment and ecology compared to organic solvents

[0020] Thus, the process according to the invention has a considerably reduced environmental and ecological impact compared to previous processes for integrating an inflation valve.

[0021] If the sub-steps of spraying E09 of the liquid composition and spraying E10 of the charge are simultaneous, this makes it possible in particular to reduce the duration of the process.

[0022] In the case where a liquid composition and a filler are sprayed simultaneously, they may each be sprayed by a separate spraying unit or by the same spraying unit. In the latter case, the liquid composition and the filler may be mixed together before being introduced into the spraying unit, or be mixed within it.

[0023] If the E10 spraying substep of the filler is carried out after the E09 spraying substep of the liquid composition, this allows in particular better control of the composition of each composite layer.

[0024] According to one aspect of the invention, during the supply substep E02 of a textile piece, said textile piece is obtained by spraying onto a support a composite layer consisting of a liquid composition and a filler resulting from the supply step E01, said composite layer being dried before or after the immobilization step E06 of the inflation valve on the deposition surface.

[0025] This advantageously reduces the environmental and ecological impact of manufacturing the inflatable object. By choosing compatible compositions for manufacturing the textile component and for forming the airtight composite layer, the bond between the two layers is improved to prevent delamination, which further enhances the seal between the inflation valve and the textile component.

[0026] According to another aspect of the invention, during the E06 immobilization step of the inflation valve on the deposition surface, this immobilization is achieved by partially immersing the collar in the composite layer of the textile part before drying of this. Partially embedding the collar in the liquid composite layer advantageously allows it to be glued into the layer and ensures a seal between the collar and the textile piece.

[0027] According to a further aspect of the invention, the immobilization step E06 is carried out by gluing, welding or sewing the collar onto the deposition surface of the textile piece.

[0028] According to one aspect of the invention, during the immobilization step E06, a positioning lug having a support skirt at its base is inserted into the valve body through the opening of the textile piece, said support skirt having a diameter larger than that of the opening of the textile piece and thus being located below the textile piece. This positioning lug advantageously allows the inflation valve to be temporarily immobilized for the spraying steps.

[0029] According to another aspect of the invention, prior to the E08 formation step of a composite layer, it includes a masking step E07 of the valve body and the inflation orifice during which a rigid protective cover is attached to the inflation valve so as to cover the valve body and the inflation orifice. This masking advantageously prevents material from being sprayed onto the valve body and into the inflation orifice.

[0030] According to a further aspect of the invention, the guard comprises a rod which is introduced into the valve body through the inflation orifice during the masking step E07. This advantageously allows both the guard to be fixed to the inflation valve and the inflation orifice to be sealed so that no material is sprayed inside.

[0031] According to one aspect of the invention, the positioning lug and the rod each have an internal threaded channel 402, 502 of the same diameter, and during the masking step E07, a fixing screw is screwed into the internal threaded channel of the positioning lug and into the internal threaded channel of the rod through the orifice, the fixing screw having a head bearing against the support skirt of the positioning lug. This fixing screw advantageously allows for better immobilization of the inflation valve for the spraying steps.

[0032] According to another aspect of the invention, during the drying step El 1, the textile piece and the inflation valve are subjected to vibrations, which in particular improves the mechanical properties of the resulting waterproof composite layer and accelerates drying.

[0033] According to a further aspect of the invention, after the drying step Eli, it comprises a formation step E13 of a finishing layer on the composite layer resulting from the formation step E08 of a waterproof composite layer, This El3 formation step of a topcoat comprises the following successive sub-steps: • spraying E14 onto the deposition surface of a liquid composition resulting from the supply step E04 of at least one liquid composition; and • drying E15 of the liquid composition sprayed during the previous spraying sub-step E12.

[0034] This E10 formation step of a finishing layer makes it possible in particular to cover the external face of the composite layer obtained with binder in order to give it a smooth and uniform aesthetic appearance and to protect the lower layers.

[0035] According to one aspect of the invention, at least one drying step Eli, E15 is carried out at room temperature, thereby reducing the cost and carbon footprint of the process. "Room temperature" refers to the temperature of the room where the process is implemented. This temperature depends on the geographical region and the season, but is usually between 10 and 30 °C, more commonly between 15 and 25 °C, and even more commonly between 18 and 22 °C. The process of the invention is thus designed to be carried out at a temperature at which most people are accustomed to working indoors.

[0036] According to another aspect of the invention, at least one drying step Eli, E15 is carried out at a temperature between 50 and 90°C, which in particular accelerates drying and promotes the hardening of the binder.

[0037] According to a further aspect of the invention, after a drying step Eli, E15, it comprises a stabilization step E16 of the airtight composite layer, this stabilization step E16 comprising at least one of the following substeps: • a heat treatment; • plasma therapy; and / or • cross-linking by UV irradiation.

[0038] According to one aspect of the invention, during substep E04 of supplying at least one liquid composition comprising a binder, said binder is water-soluble and said liquid composition comprises a water-based solvent in which the binder is dissolved, and the liquid composition is such that: • the binder comprises one or more water-soluble polymers, which represent 30 to 70% by weight of the liquid composition; • The water-based solvent comprises water representing 30 to 70% by weight of the liquid composition.

[0039] In addition to being non-toxic, inexpensive, and abundant, water offers numerous and obvious advantages for the environment and ecology compared to organic solvents. Thus, the process according to the invention has an environmental impact and ecological impact considerably reduced compared to previous processes of textile production by spraying.

[0040] According to another aspect of the invention, during the substep of supplying E05 at least one charge consisting of loose fibers and / or a powder, at least 5% by weight of said charge is of bio-based origin, which advantageously reduces the carbon footprint of the process.

[0041] According to one aspect of the invention, during a formation step E08 of a composite layer, the filler represents 30 to 60% by weight of said composite layer, which advantageously reduces the environmental and ecological impact of the process.

[0042] According to another aspect of the invention, during a step E08 of forming a composite layer, the weight-to-weight ratio of the filler in said composite layer is in the range of 2:1 to 1:2, which advantageously reduces the environmental and ecological impact of the process while providing a textile part with characteristics suitable for its subsequent use. The choice of this ratio makes it possible, in particular, to adapt the flexibility and strength of the resulting textile part for a given final thickness, with a high binder content generally favoring flexibility, while a high filler content generally favoring rigidity of the resulting textile part.

[0043] According to a further aspect of the invention, during a formation step E08 of a composite layer, a bio-based filler represents 5 to 50%, preferably 10 to 40% and more preferably 15 to 30% by weight of said composite layer, which advantageously reduces the environmental and ecological impact of the process.

[0044] According to one aspect of the invention, during the E05 feed-in step, 5 to 70%, preferably 10 to 60% and more preferably 20 to 50% by weight of the feed is of bio-based origin.

[0045] According to another aspect of the invention, during the feed supply step E05, 5 to 70%, preferably 30 to 65% and more preferably 40 to 60% by weight of the bio-based feed consists of viscose fibers, cotton fibers, wool fibers, silk fibers, cashmere fibers, flax fibers, fur fibers, mammal hair, mycelium fibers, cellulose fibers, wood fibers, hemp fibers, mycelium powder, rice powder, wheat powder, wood powder, starch powder, alginate powder, carbon black powder, wheat flour, corn flour, millet flour, hemp flour, rapeseed flour, soybean hull powder, walnut hull powder, olive kernel powder, cellulose nanofiber powder, powder or fibers polyamide, polypropylene powder or fibers, polypropylene powder or fibers polyethersulfone or polyurethane powder or fibers, taken alone or in mixture, which notably helps to reduce the carbon footprint of the process.

[0046] According to a further aspect of the invention, during the E05 supply step of a filler, 5 to 70%, preferably 30 to 65% and more preferably 40 to 60% by weight of the bio-based filler are made up of at least one bio-based material comprising at least 5% by weight of calcium, preferably at least 10% by weight of calcium, which in particular makes it possible to improve the tensile strength, the compressive strength and / or the water absorption capacity of the resulting textile piece.

[0047] According to one aspect of the invention, at least one bio-based material comprising at least 5% by weight of calcium is gypsum powder, limestone powder, bone powder, calcium carbonate powder or chalk powder, which advantageously makes it possible to reduce the environmental and ecological impact of the process.

[0048] Indeed, calcium carbonate increases the tensile and compressive strength of the resulting textile. Magnesium sulfate increases both the tensile and compressive strength of the resulting textile, as well as its water absorption capacity. Gypsum, on the other hand, only increases the tensile strength of the resulting textile, while sodium sulfate increases the water absorption capacity of the resulting textile.

[0049] According to another aspect of the invention, during the supply step E04 of at least one liquid composition, the binder comprises at least 10%, preferably at least 30% and more preferably at least 60% by weight of bio-based and / or biodegradable polymer, which in particular makes it possible to reduce the carbon footprint of the process.

[0050] According to a further aspect of the invention, during the supply step E04 of at least one liquid composition, the binder comprises at least 5%, preferably at least 30% and more preferably at least 70% by weight of elastomer, which makes it possible in particular to produce a piece of textile which may have elastic properties.

[0051] According to one aspect of the invention, during the supply step E04 of at least one liquid composition, the binder comprises at least 5%, preferably at least 30% and more preferably at least 70% by weight of natural latex of vegetable origin, latex of vegetable origin treated to reduce its protein content, bio-based polylactic acid, bio-based thermoplastic polyurethane, bio-based polyurethane dispersion, dispersion of rosin of vegetable origin, dispersion of terpene of vegetable origin, and acrylic polymer. bio-based or polymer matrix hydrogel, taken alone or in mixture, which advantageously reduces the environmental and ecological impact of the process.

[0052] According to another aspect of the invention, during the supply step E04 of at least one liquid composition, the binder comprises at least 10%, preferably at least 20% and more preferably at least 30% by weight of electrically conductive polymer, which notably allows the resulting textile piece to be instrumented.

[0053] According to a further aspect of the invention, during the supply step E04 of at least one liquid composition, the liquid composition comprises 1 to 30% by weight of magnesium sulfate and / or sodium sulfate, which in particular improves the tensile strength, the compressive strength and / or the water absorption capacity of the resulting textile piece.

[0054] According to one aspect of the invention, during the supply step E04 of at least one liquid composition or during the supply step E05 of a filler consisting of loose fibers and / or a powder, the liquid composition or the filler includes a water-soluble bridging agent capable of forming ionic and / or covalent bonds with the binder, which makes it possible in particular to improve or modify the physical properties of the textile piece, in particular its mechanical resistance and / or its elasticity.

[0055] According to another aspect of the invention, the bridging agent mainly comprises a culture substrate containing fungal spores grown therein, fungal mycelium, silicate derivatives or magnesium chloride derivatives, taken alone or in mixture, which advantageously reduces the environmental and ecological impact of the process.

[0056] According to a further aspect of the invention, during a formation step E08 of a composite layer, the weight ratio of bridging agent in said composite layer is in the range between 1:100 and 1:1, preferably between 1:10 and 1:4, and more preferably between 2:10 and 3:10, which in particular makes it possible to improve or modify the physical properties of the textile piece in a satisfactory manner.

[0057] According to one aspect of the invention, during the supply step E04 of at least one liquid composition, the charge includes a coalescing agent whose quantity represents from 0.1 to 10%, preferably 1 to 5% by weight of the liquid composition.

[0058] According to another aspect of the invention, the coalescing agent is 2,2,4-trimethyl-1,3-pentane diol monoisobutyrate, glycol acetate, butyl glycol, fatty acid ester, propylene glycol or ethyl acetate, taken alone or in mixture.

[0059] According to a further aspect of the invention, during the supply step E04 of at least one liquid composition, said liquid composition comprises at least a pigment, which advantageously allows the production of a piece of textile with at least one layer dyed throughout.

[0060] According to one aspect of the invention, during the supply step E04 of at least one liquid composition, said liquid composition comprises a viscosity-modifying agent, which advantageously allows the viscosity of the liquid composition to be adjusted, for example, to thicken or thin it, particularly to ensure that it adheres to the substrate without excessive dripping, for example, when the application surface is not entirely flat and horizontal. Viscosity here also refers to the rheological properties of the liquid composition.

[0061] According to another aspect of the invention, the viscosity agent is polylactic acid, sugar, polysaccharide derivative, alginate, potato dextrose, agar, glucose, malt, peptone or yeast extract, taken alone or in mixture, which advantageously reduces the environmental and ecological impact of the process.

[0062] According to a further aspect of the invention, during the supply step E04 of at least one liquid composition, said liquid composition has a dynamic viscosity between 0.1 and 10,000 mPa.s at 20 °C, which provides a wide viscosity range suitable for the different spraying conditions and the different applications envisaged.

[0063] According to one aspect of the invention, during the supply step E04 of at least one liquid composition, said liquid composition includes an adhesive agent, which notably improves the bond between the different layers of the textile piece if necessary. Indeed, the bond between layers can be achieved by the binder itself present in each layer, particularly when it comprises polymers of the same chemical family.

[0064] According to another aspect of the invention, the adhesive agent is an aqueous dispersion of rosin and terpene, both of plant origin, which advantageously reduces the environmental and ecological impact of the process.

[0065] According to a further aspect of the invention, during a substep E06 of spraying a liquid composition, said liquid composition completely covers a filler comprising fibers, at least 80% of these fibers having a length between 3 and 7 mm, preferably between 3 and 5 mm, and more preferably between 3 and 4 mm, which in particular makes it possible to reinforce the resulting textile piece.

[0066] According to one aspect of the invention, during a substep E06 of spraying a liquid composition, said liquid composition does not completely cover a filler comprising fibers, at least 80% of these fibers having a length between 0.1 and 2 mm, preferably between 0.5 and 1.5 mm, and more preferably between 0.5 and 1 mm, which notably improves the feel of the resulting piece of textile, with average counts of 1.7 Dtex for fibers with a length of 0.5 mm and 3.3 Dtex for fibers with a length of 1 mm.

[0067] One aspect of the invention also relates to a textile component equipped with an inflation valve, in which the inflation valve is sandwiched between the deposition surface and a composite layer comprising a binder and a filler, said textile component equipped with an inflation valve being a product resulting from the process described above. By virtue of its production process, this textile component advantageously exhibits excellent airtightness.

[0068] According to one aspect of the invention, the piece of textile has an average thickness of between 0.1 and 3 mm.

[0069] Another aspect of the invention also relates to a method for producing a three-dimensional inflatable object by assembling several pieces of textile together in an airtight manner to form said inflatable object, wherein at least one of said pieces of textile is a piece of textile as described above. By its production method, this inflatable object advantageously exhibits excellent airtightness.

[0070] According to one aspect of the invention, at least some textile pieces without an inflation valve are obtained by spraying onto a support a composite layer consisting of a liquid composition and a filler resulting from the supply step E01, said composite layer being dried before the textile pieces are assembled together in an airtight manner to form the inflatable object.

[0071] The invention and its various applications will be better understood by reading the following description and examining the accompanying figures. BRIEF DESCRIPTION OF THE FIGURES

[0072] The figures are presented for illustrative purposes only and are in no way limiting of the invention.

[0073] [Fig. 1] is a schematic representation of an example of a method according to the invention in which a liquid composition is sprayed before a charge.

[0074] [Fig.2] is a schematic representation of an example of a method according to the invention in which a liquid composition and a charge are sprayed simultaneously.

[0075] [Fig.3] is a schematic perspective view of an inflation valve being positioned on the orifice of a piece of textile.

[0076] [Fig.4], [Fig.5], [Fig.6], [Fig.7], [Fig.8], [Fig.9] and [Fig.10] are schematic representations of the different stages of a first example of a process according to the invention in which the piece of textile is already supplied.

[0077] [Fig.11], [Fig.12], [Fig.13], [Fig.14], [Fig.15], [Fig.16], [Fig.17], [Fig.18], [Fig.19] and [Fig.20] are schematic representations of the different stages of a second example of a process according to the invention in which the textile piece is manufactured by spraying.

[0078] [Fig.21] is a schematic view of an example of a device comprising two units spraying units, each mounted on a separate robotic arm, enabling the implementation of the process according to the invention for the production of a flat-sided textile.

[0079] [Fig.22] is a schematic view of an example of a device comprising two spraying units mounted on the same robotic arm and enabling the implementation of the process according to the invention for the production of a textile in the shape of a flat flank.

[0080] [Fig.23] is a schematic view of an example of a device comprising a single spraying unit mounted on a robotic arm and enabling the implementation of the process according to the invention for the production of a hemispherical textile.

[0081] [Fig.24] is a schematic view of an example of a device comprising three spraying units mounted on the same robotic arm, enabling the implementation of the process according to the invention for the production of six pieces of textile in the shape of the side of a swimming armband. DETAILED DESCRIPTION

[0082] Unless otherwise specified, the same element appearing on different figures has a unique reference.

[0083] The method according to the invention for integrating an inflation valve 2 onto a piece of textile 1 by spraying includes numerous variants. However, two main variants can be distinguished.

[0084] The first main variant concerns the case where the textile piece 1 is already manufactured and the process only concerns the integration of an inflation valve 2 on it.

[0085] The second main variant concerns the case where the textile piece 1 is also manufactured by spraying, before integration of an inflation valve 2 on it.

[0086] In both cases, the process according to the invention comprises many steps.

[0087] The steps of the first main variant are illustrated on [Fig.3] to [Fig. 10] and are described below.

[0088] The method according to the invention comprises a preliminary supply step E01 of certain essential means of the invention. This supply step E01 comprises a supply substep E02 of a piece of textile 1, a supply substep E03 of an inflation valve 2, a supply substep E04 of at least one liquid composition comprising a binder dissolved in a solvent and a substep E05 of supplying a filler consisting of loose fibers and / or a powder.

[0089] As illustrated in [Fig. 3], the textile piece 1 comprises a deposition surface 101 and has an orifice 102 into which an inflation valve 2 is intended to be integrated. This inflation valve 2 has a tubular valve body 201 having an inflation orifice 202 at one end and a base 203 equipped with a collar 204 at the opposite end. The inflation valve 2 may include a valve plug 205 for closing the inflation orifice 202, this plug 205 being, for example, connected to the valve body 201 by a fastener 206. Conventionally, the inflation valve 2 may also include a non-return valve. The inflation port 202 is sometimes referred to as the inflation nipple for the small elastomer inflation valves 2 intended for mouth inflation.

[0090] The collar 204 has a larger diameter than the opening 102 of the textile piece 1 so that it can completely cover the opening. The opening 102 of the textile piece 1 and the collar 204 are not necessarily circular, although they preferably are. Therefore, "diameter" refers to the average diameter, so that the collar 204 always completely covers the opening 102 of the textile piece 1.

[0091] Examples of liquid composition comprising a binder and filler consisting of loose fibers and / or a powder will be described after the description of the two main variants of the process of the invention.

[0092] The method according to the invention then comprises a step E06 of immobilizing the inflation valve 2 on the deposition surface 101 (see [Fig. 3]), so that the collar 204 is preferably centered on the orifice 102 of the textile piece 1. Thus, the hollow internal volume of the valve body 201 communicates with the orifice 102. This immobilization step E06 can be carried out by any known means. It is preferably carried out by gluing, welding, or sewing the collar 204 onto the deposition surface 101 of the textile piece 1.

[0093] Optionally, during the immobilization step E06, a positioning lug 4 can be introduced into the valve body 201 through the orifice 102 of the textile piece 1 (see [Fig.4]), in order to hold the inflation valve 2 on the textile piece 1 so that it is not torn off during the subsequent spraying step. The positioning lug 4 has a body 403 whose diameter is equal to or slightly less than that of the orifice 102 of the textile piece 1. At its base, the positioning lug 4 has a support skirt 401 whose diameter is greater than that of the orifice 102. The positioning lug 4 is preferably introduced into the valve body 201 from below, the support skirt 401 then being located under the textile piece 1, i.e. bearing on the face opposite to the deposition surface 101.

[0094] The positioning lug 4 is preferably made of thermoplastic material, preferably TPU. It is chosen in a material preferably compatible with sprayed coatings.

[0095] Optionally, after the immobilization step E06, the method according to the invention may include a masking step E07 of the valve body 201 and the inflation orifice 202. During this masking step E07, a rigid protective cover 5 is attached to the inflation valve 2 (see [Fig. 5]), in order to cover the valve body 201 and the inflation orifice 202. This prevents material from being deposited on the valve body 201 and on the inflation orifice 202 during the subsequent spraying step.

[0096] The cover 5 may, for example, be in the form of a bell whose walls are designed to cover the valve body 201 and the inflation port 202. The cover 5 preferably includes a rod 501 extending longitudinally from the top of the cover 5, inside it. During the masking step E07, this rod 501 is inserted into the valve body 201 through the inflation port 202.

[0097] It will be noted that the part of the body 403 of the positioning lug 4, and that of the stem 501 of the protection 5 has a diameter and a shape substantially similar to those of the hollow internal part 207 of the tubular valve body 201.

[0098] According to a preferred embodiment of the invention, the positioning lug 4 and the rod 51 each have an internal threaded channel 402, 502 of the same diameter. During the masking step E07, once the positioning lug 4 and the guard 5 are in place against the inflation valve 2, a fixing screw 6 is screwed into the internal threaded channel 402 of the positioning lug 4 and into the internal threaded channel 502 of the rod 501 through the orifice 102 (see [Fig. 6]). The fixing screw 6 has a head 601 which preferably bears against the support skirt 401 of the positioning lug 4.

[0099] Whether the positioning lug 4 and the protection 5 are in place or not, the formation step E08 can then be carried out on the deposition surface 101 and on the collar 204 of the same airtight composite layer 7 (see [Fig.7]), said composite layer 7 being made up of a liquid composition and a filler resulting from the supply step E01.

[0100] This E08 training step comprises the following substeps: • spraying E09 onto the deposition surface 101 and onto the collar 204 of a liquid composition resulting from the supply step E01; and • spraying E10 onto the deposition surface 101 and onto the collar 204 of a charge consisting of loose fibers and / or a powder resulting from the supply step E01; • the spraying substep E10 of a filler being simultaneous with or subsequent to the spraying substep E09 of the liquid composition.

[0101] These two spraying substeps E09, E10 can be carried out one after the other (see [Fig. 1]), or simultaneously (see [Fig. 2]). If these two substeps are carried out simultaneously, the liquid composition and the filler can be sprayed by a single spraying unit 9 in which they are in a composite mixture state, or be sprayed at the same time by a separate spraying unit 9 for each.

[0102] It will be noted that it is technically easier to spray a composite mixture with a single spraying unit 9 when the filler preferably comprises a powder and / or very short fibers, because it is difficult to obtain a satisfactory spray quality when spraying a composite mixture comprising both a liquid composition and a filler containing long fibers.

[0103] The two spraying sub-steps E09, E10 can be carried out at a pressure between 0.5 and 100 bar.

[0104] During the spraying step E09 of a liquid composition according to the invention, a thin layer of liquid composition is preferentially deposited on the deposition surface 101 and on the collar 204.

[0105] During the spraying step E10 of a charge according to the invention, a thin layer of charge is preferentially deposited on the deposition surface 101 and on the collar 204.

[0106] For these spraying steps E09, E10, by thin layer means a layer of liquid composition having an average thickness of between 0.1 and 2 mm, preferably between 0.2 mm and 1.5 mm, and more preferably between 0.2 and 0.8 mm.

[0107] If the liquid composition and the filler are sprayed simultaneously or one after the other, the liquid composition being sprayed before the filler, the liquid composition and the filler form a composite layer.

[0108] In a composite layer, the distribution of the filler within the liquid composition is not necessarily homogeneous and may vary throughout the thickness of said composite layer. The textile may therefore exhibit different physical and / or chemical characteristics in certain areas and / or throughout its thickness.

[0109] Masks can be used during these spraying steps E09,E10 to control the shape and dimensions of the deposition surface 101. The liquid composition and the charge deposited on these masks can be recovered and used in order to limit waste.

[0110] According to one embodiment, during a formation step E08 of a composite layer, the filler represents 30 to 60% by weight of said composite layer. A bio-based filler of the filler represents 5 to 50%, preferably 10 to 40% and more preferably 15 to 30% by weight of said composite layer.

[0111] According to one embodiment, the quantity of filler and the quantity of liquid composition sprayed into a composite layer are such that the weight-to-filler ratio in said composite layer is in the range between 2:1 and 1:2.

[0112] During a substep E09 of spraying a liquid composition, this spraying E09 can be arranged so that said liquid composition completely covers a filler comprising so-called long fibers, i.e., at least 80% of these fibers have a length between 3 and 7 mm, preferably between 3 and 5 mm, and more preferably between 3 and 4 mm. This has the effect of strengthening the resulting composite layer 7.

[0113] During a substep E09 of spraying a liquid composition, this spraying E09 can also be provided such that said liquid composition does not completely cover a filler comprising so-called short fibers, i.e., at least 80% of these fibers have a length between 0.1 and 2 mm, preferably between 0.5 and 1.5 mm, and more preferably between 0.5 and 1 mm. This has the effect of improving the feel of the resulting composite layer 7.

[0114] Once these two spraying steps E09, E10 have been carried out, the process according to the invention includes a drying step El1 during which the sprayed composite layer 7 solidifies. During this drying step El1, the solvent, preferably water-based, evaporates and the binder hardens. If the latter is a water-soluble polymer, it hardens by polymerization. Due to the thinness of the liquid composite layer 7, this drying can be quite rapid, for example, on the order of 1 to 10 minutes, preferably 2 to 8 minutes, and more preferably 3 to 5 minutes. As it hardens, the binder fixes the filler, which forms a composite layer 7.

[0115] An Eli drying step can be carried out at room temperature, or with heating, for example at a temperature between 50 and 90°C.

[0116] The drying steps are preferably carried out at atmospheric pressure.

[0117] According to one aspect of the invention, during the drying step El 1, the piece of textile 1 or its possible support 3 can be subjected to vibrations, for example by means of a vibrator.

[0118] The spraying steps E09, E10, which allow obtaining a liquid composite layer 7, and the drying step Eli, which allows solidifying said composite layer 7, can be repeated at least once in order to increase the thickness of the composite layer 7 obtained on the deposition surface 101 of the textile piece 1 and on the collar 204 of the inflation valve 2. The process according to the invention thus comprises at least one repetition step E12, which includes a spraying step E09 of a liquid composition and a spraying step E10 of a filler, followed by at least one drying step El 1 of the composite layer 7 obtained.

[0119] The spraying steps E09, E10 and drying step E1 are preferably repeated one to five times, more preferably twice, so as to superimpose three composite layers in total. This makes it possible, for example, to obtain a composite layer 7 having an average thickness of between 0.1 and 3 mm, preferably between 0.2 and 2 mm.

[0120] These layers of sprayed composite material are preferentially chemically compatible, so that they fuse together and form only one composite layer 7.

[0121] During a repetition step E12 for layering composite materials, the liquid composition and / or filler according to the invention used for each sprayed composite layer may be identical to those of the previous sprayed composite layer or different. In the latter case, the composition of the resulting composite layer 7 is not homogeneous throughout its thickness. This makes it possible, in particular, to combine the characteristics of several binders and / or fillers within the same composite layer 7.

[0122] Similarly, during a spraying step E09, E10, it is possible to simultaneously spray liquid compositions and / or fillers according to the invention which are locally different, in different places on the deposition surface 101 and the collar 204, which makes it possible to obtain a composite layer 7 whose composition is not homogeneous over its entire surface.

[0123] Finally, during a spraying step E09, E10, it is possible to locally spray more liquid composition and / or more filler onto the deposition surface 101 and the flange 204, or to repeat the spraying steps E09, E10 in order to spray liquid composition and / or filler locally only onto a specific part of the deposition surface 101 and the flange 204. This makes it possible, in particular, to vary the thickness of the resulting composite layer 7 locally. Thus, a thicker layer can, for example, be deposited around the edge of the flange 204 in order to reinforce the strength and sealing of this junction area with the textile part 1.

[0124] After drying El 1 of the composite layer 7 obtained, the following steps consist of removing any positioning lugs 4 and protection 5 (see [Fig.9]), for example after unscrewing the fixing screw 6 (see [Fig.8])

[0125] We then obtain a piece of textile 1 equipped with an inflation valve 2, where part of the deposition surface 101 and of the collar 204 are covered by an airtight composite layer 7 (see [Fig. 10]).

[0126] Optionally, after drying E1 of the composite layer 7 obtained and before removal of the positioning lug 4 and the protective layer 5, the process according to the invention may also include a step E13 for forming a topcoat. This step E13 for forming a topcoat comprises a substep E14 of spraying a liquid composition according to the invention onto the composite layer 7 followed by a substep E15 of drying said liquid composition.

[0127] This drying substep E15 for hardening the binder, for example by polymerization of the water-soluble polymer by evaporation of water, has the same characteristics as the drying step E08 previously described for a composite layer 7.

[0128] This E13 formation step of a topcoat consists, for example, of ensuring that the last charge to have been sprayed adheres well to the binder, or is even completely embedded in it.

[0129] Optionally, the process according to the invention may also include a stabilization step E16 of one or more constituent layers of the composite layer 7, for example carried out after a drying step Eli, E15.

[0130] This stabilization step E16 comprises at least one of the following substeps: • a heat treatment; • plasma therapy; and / or • cross-linking by UV irradiation.

[0131] This stabilization step E16 of a constituent layer of the composite layer 7 can, in particular, render inert the organic components of the filler that are liable to mineralize or degrade over time. This step can also be used to treat a surface of the composite layer 7 in order to functionalize it or modify its physicochemical properties, for example to waterproof it, activate it, clean it, improve its adhesion, control its final shrinkage, or impregnate it with an odorant, colorant, antifungal, antimicrobial, or other substance.

[0132] A heat treatment consists, for example, of subjecting the constituent layer of the composite layer 7 to a temperature between 50 and 90 °C for a period of between 5 and 30 minutes, depending on the nature and thickness of the layer being treated. This allows for control of the final shrinkage of the material in order to stabilize its dimensions. Indeed, a constituent layer of the composite layer 7 is likely to absorb moisture after its manufacture, and this heat treatment therefore aims to achieve a short drying period to ensure that it is free of moisture before use or packaging.

[0133] Plasma treatment can, for example, be carried out using an atmospheric pressure plasma or a low-pressure plasma. An atmospheric pressure plasma operates at pressures close to atmospheric pressure, allowing for rapid and efficient treatment. It is preferentially used for continuous applications, while a low-pressure plasma is generally operated below 0.1 to 1 Torr, offering precise control over the treatment conditions. It requires longer exposure times but can use higher power levels.

[0134] The power used for plasma treatment varies depending on the type of plasma and the treatment objectives. It can range from a few watts to several kilowatts depending on the equipment and application, and is adjusted according to the type of material and the desired properties. For example, it ranges from 10 to 200 watts for atmospheric pressure plasma and from 100 to 1000 watts for low-pressure plasma. High power can improve the cleaning and functionalization of the treated textile surface, but it must be balanced to avoid damaging the material. Indeed, excessive power can lead to thermal degradation of the load.

[0135] Just as with the applied power, the duration of exposure and the type of gas used (nitrogen, argon, etc.) for plasma treatment are crucial to optimizing results.

[0136] The exposure time is for example between 10 seconds and 10 minutes, while the gas used is chosen according to the desired effect and its chemical reactivity with the textile.

[0137] The gases that can be used are as follows: • Oxygen (O2): used to improve the hydrophilicity of the filler fibers (e.g. polyester fibers). • Argon (Ar): used to increase the hardness of the fibers in the filler. • a fluorinated gas (e.g. CF4): makes surfaces hydrophobic, similar to PTFE. • a mixture of ethylene and propylene: used to obtain an oleophilic layer. • Nitrogen (N2): used for specific treatments and to create an inert atmosphere.

[0138] Plasma treatment can be combined with the incorporation of a liquid, powder, microparticles, or nanoparticles. For example, hydrophobicization of a layer surface can be achieved by combining plasma treatment with the addition of hydrophobic agents to create a composite layer. Waterproof. Similarly, plasma treatment can be combined with the incorporation of nanoparticles or antimicrobial agents to enhance the antibacterial and antifungal properties of the composite layer 7.

[0139] Plasma treatment can modify the texture of a surface of the composite layer 7, for example to prepare said surface before printing or bonding. In this case, plasma treatment can be used to increase the specific surface area available for adhesion, thereby improving the performance of the applied coatings.

[0140] Plasma treatment is advantageous because it reduces the use of water and chemicals compared to traditional methods. Indeed, plasma treatment requires little or no water and reduces the use of organic solvents, thus minimizing the environmental impact of the process.

[0141] UV irradiation crosslinking consists of irradiating a layer with ultraviolet rays. This crosslinking can, for example, be achieved by free radicals or by cationic means. In both cases, UV protection is necessary to protect the skin and eyes.

[0142] Free radical crosslinking is based on the decomposition of a photoinitiator, releasing free radicals. It allows for a very rapid polymerization rate, on the order of a few seconds, but is sensitive to inhibition by oxygen. It generally promotes good adhesion of the treated layer, but its effectiveness depends on the composition of the photoinitiator and can be limited by the thickness of the layer. Thus, longer exposure times are necessary for thick materials. Free radical crosslinking uses a UV radiation power preferably between 200 and 400 mW / cm², for a duration preferably between 1 and 10 seconds, depending on the formulation and the thickness of the treated layer.

[0143] Cationic crosslinking is based on the formation of positive ions by UV irradiation. It allows for a polymerization rate that is slightly slower than free radical crosslinking, on the order of a few minutes, but is less sensitive to inhibition by oxygen. It generally promotes good chemical and thermal resistance of the treated layer, and its effectiveness is less affected by thickness than free radical crosslinking. Cationic crosslinking uses a UV radiation power preferably between 100 and 300 mW / cm², for a duration preferably between 10 and 60 seconds, depending on the formulation and thickness of the treated layer.

[0144] In the process according to the invention, crosslinking by free radicals is preferred because it is faster and suitable for the small thicknesses of the layers obtained during each spraying step.

[0145] Optionally, the method according to the invention may also include a step of applying pressure to the material of the composite layer 7, for example before the stabilization step E16, to increase the mechanical properties of the composite layer 7 and prevent its delamination. This pressure may, for example, be applied to the composite layer 7 by means of a counter-mold that substantially conforms to its shape, while respecting the surface design of the part.

[0146] The steps of the second main variant are illustrated on [Fig.1 1] to [Fig.20] and are described below.

[0147] The method according to the invention includes a preliminary supply step E01 of certain essential means of the invention. As with the first main variant, this supply step E01 includes a supply substep E02 of a textile piece 1, a supply substep E03 of an inflation valve 2, a supply substep E04 of at least one liquid composition comprising a binder dissolved in a solvent, and a supply substep E05 of a filler consisting of loose fibers and / or a powder. These essential means are the same for both main variants. The preliminary supply step E01 of the second main variant differs in that it further includes a supply substep of a spray support 3, which comprises a deposition surface 301 and has an orifice 302. This orifice 302 is preferably similar in shape and diameter to that of the textile piece 1.

[0148] The support 3 is preferably rigid, but it may be at least partially flexible or elastic. It is preferably made of steel, aluminum, thermoplastic polyurethane (TPU), thermoplastic polyamide elastomer (TPA), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polycarbonate (PC), polyamide (nylon), polystyrene (PS), polypropylene (PP), or acrylonitrile butadiene styrene (ABS). It may itself be inflatable, soluble, or fragmentable so that it can be extracted through the inflation port 202 of the inflation valve 2 once the textile piece 1 is fitted with it.

[0149] At least a portion of the deposition surface 301 of the support 3 may be textured in relief or intaglio, for example, to form a composite base layer 71 with an internally textured face. Indeed, although the support 3 only serves as a temporary support, it is the shape of the deposition surface 301 onto which the liquid composition and filler according to the invention are sprayed that substantially determines the shape adopted by the resulting piece of textile 1.

[0150] Optionally, before the next step, a positioning lug 4 can be inserted into the orifice 302 of the support 3 (see [Fig. 11]), in order to temporarily plug the orifice 302 and subsequently serve to hold the inflation valve 2 onto the textile piece 1 so that it is not torn off during the step of spraying. At its base, the positioning lug 4 has a support skirt 401 whose diameter is larger than that of the orifices 102 and 302. The positioning lug 4 is preferably inserted into the orifice 302 from below, the support skirt 401 then being located under the support 3 or in a recess 303 formed on its underside. This positioning lug 4 can be similar to that described for the first main variant. Its body 403 can, however, be slightly longer because it must also pass through the support 3 during its installation. This additional length is, for example, similar to the local thickness of the support 3 where the support skirt 401 makes contact.

[0151] The next step is a step of forming a textile part 1 by spraying. It consists of reproducing the spraying steps E09, E10 of the previous variant, which make it possible to obtain a liquid base composite layer 71 by spraying onto the deposition surface 301 of the support (see [Fig. 12]), and the drying step Eli, which makes it possible to solidify said base composite layer 71 in order to form a flexible part, similar in its behavior and in its role to that of the textile part 1 of the first main variant.

[0152] For the sake of simplicity, this flexible part will hereafter be referred to as textile part 1. This textile part has a deposition surface 101 1 which is opposite to that resting on the support 3.

[0153] These spraying steps E09, E10 and El 1 can be repeated at least once in order to increase the thickness of the textile piece 1 obtained on the deposition surface 301 of the support 3.

[0154] It should be noted that the textile piece 1 also has an orifice 102, for example closed by the positioning lug 4.

[0155] The step of forming a textile piece 1 by spraying is followed by a step of immobilizing E06 the inflation valve 2 on the textile piece 1 obtained so that the collar 204 is preferentially centered on the orifice 102 of the textile piece 1 and on the orifice 302 of the support 3.

[0156] This immobilization step E06 can be carried out by any known means. It can be carried out by gluing, welding or sewing the collar 204 onto the textile piece 1.

[0157] It is preferably carried out by partially immersing the collar 204 in the last liquid base composite layer 71 deposited by spraying before the latter has dried (see [Fig. 13]).

[0158] If a positioning lug 4 has been put in place, the inflation valve 2 is mounted on it, so that a part of the body 403 of the support enters the tubular valve body 201.

[0159] As with the previous main variant, also optionally, after the immobilization step E06, the method according to the invention may include a masking step E07 of the valve body 201 and the inflation orifice 202. During this masking step E07, a rigid cover 5 is fixed to the inflation valve 2 (see [Fig. 14]), in order to cover the valve body 201 and the inflation orifice 202. This cover 5 may be similar to that described for the first main variant.

[0160] As before, according to a preferred embodiment of the invention, the positioning lug 4 and the rod 51 each have an internal threaded channel 402, 502 of the same diameter. During the masking step E07, once the positioning lug 4 and the guard 5 are in place against the inflation valve 2, a fixing screw 6 is screwed into the internal threaded channel 402 of the positioning lug 4 and into the internal threaded channel 502 of the rod 501 through the orifice 102 (see [Fig. 15]). The fixing screw 6 has a head 601 which preferably bears against the support skirt 401 of the positioning lug 4.

[0161] Whether the positioning lug 4 and the protection 5 are in place or not, the formation step E08 can then be carried out on the deposition surface 101 and on the collar 204 of the same airtight composite layer 7 (see [Fig. 16]), said composite layer 7 being made up of a liquid composition and a filler resulting from the supply step E01.

[0162] This E08 training step is similar to that of the first main variant of the invention, and therefore comprises the following sub-steps: • spraying E09 onto the deposition surface 101 and onto the collar 204 of a liquid composition resulting from the supply step E01; and • spraying E10 onto the deposition surface 101 and onto the collar 204 of a charge consisting of loose fibers and / or a powder resulting from the supply step E01; • the spraying substep E10 of a charge being simultaneous with or subsequent to the spraying substep E09 of the liquid composition.

[0163] The composite material of the sprayed composite layer 7 and that of the base composite layer 71 are chemically compatible and preferably similar. Thus, after drying of the sprayed composite layer 7, these two layers form only one layer of textile 1,7 (see [Fig. 18]).

[0164] Depending on the nature of the liquid compositions used, these different layers of material may be more or less bonded to each other. They may also form a substantially homogeneous whole such that it is not possible to distinguish them.

[0165] Optionally, after drying El 1 of the composite layer 7 obtained and before removal of the positioning lug 4 and the protection 5, the process according to the invention may also include a formation step E13 of a finishing layer, for example similar to that described for the first main variant.

[0166] Similarly, optionally, the process according to the invention may also include a stabilization step E16 of one or more constituent layers of the composite layer 7, for example carried out after a drying step Eli, E15, and for example similar to that described for the first main variant.

[0167] After removing the fixing screw 6 (see [Fig. 17]), the positioning lug 4 and the protective cover 5 can then be removed (see [Fig. 18]). The textile layer 1,7 and its inflation valve 2 can then be removed from the support 3 (see [Fig. 19]).

[0168] We then obtain a piece of textile 1,7 airtight, in the thickness of which an inflation valve 2 is integrated (cf. [Fig.20]).

[0169] The method according to the invention, whether it be for example the first or the second main variant, uses at least one liquid composition and at least one filler intended to be sprayed onto the deposition surface 101 of a piece of textile 1 and onto the collar 204 of an inflation valve 2. According to the second variant of the invention, at least one liquid composition and at least one filler are also intended to be sprayed onto a support 3 in order to produce a piece of textile 1.

[0170] A liquid composition according to the invention comprises a binder, preferably water-soluble, and a solvent, preferably aqueous, in which the binder is dissolved.

[0171] The aqueous solvent is preferably entirely composed of water. It represents 30 to 70% by weight of the liquid composition.

[0172] The binder comprises a water-soluble polymer representing 30 to 70% by weight of the liquid composition.

[0173] Although the binder may be supplied in the form of an aqueous solution, the percentages given here are in dry weight of binder or water-soluble polymer.

[0174] The binder preferably comprises one or more water-soluble bioplastics or one or more recyclable water-soluble polymers. Bioplastics are understood to mean polymers derived from renewable sources (bio-based polymers) and biodegradable polymers. Thus, a bioplastic may be bio-based but not biodegradable, bio-based and biodegradable, or derived from fossil resources (often petrochemicals) and yet biodegradable. Bioplastics should not be confused with biocompatible plastics.

[0175] Thus, the water-soluble binder comprises at least 10%, preferably at least 30% and more preferably at least 60% by weight of bio-based and / or biodegradable polymer.

[0176] In order to produce a textile part 1 with elastic properties, the water-soluble binder may comprise at least 5%, preferably at least 30%, and more preferably at least 70% by weight of elastomer. This variant is preferred in cases where the inflatable object expands (extends beyond its initial volume when already inflated and air continues to be blown into it) during inflation, as for example in the case of an inner tube or a balloon bladder.

[0177] Where it is not desired that the inflatable object be expandable, for example, in the case of a swimming armband or a mattress, the sprayed composite composition is chosen so as not to exhibit elastic properties. Spacers may also be provided inside the inflatable object to ensure that it does not expand during inflation and retains its inflated shape, even when air continues to be injected into it. Of course, injecting an excessive amount of air into such a non-expandable inflatable object can result in excessive pressure inside it and cause it to rupture.

[0178] According to one embodiment, the water-soluble binder comprises at least 5%, preferably at least 30% and more preferably at least 70% by weight of natural latex of vegetable origin, latex of vegetable origin treated to reduce its protein content, bio-based polylactic acid, bio-based thermoplastic polyurethane, bio-based polyurethane dispersion, rosin dispersion of vegetable origin, terpene dispersion of vegetable origin, bio-based acrylic polymer or polymer matrix hydrogel, taken alone or in mixture.

[0179] Natural latex of plant origin is extracted in liquid form from several plants and trees, primarily the rubber tree (Hevea brasiliensis), and forms rubber after polymerization. It is advantageous because it is bio-based, biodegradable, compostable, recyclable, and elastic. A plant-based latex treated to reduce its protein content was Vytex® from VYSTAR, which yielded excellent results with the process for producing a textile garment 1 according to the invention.

[0180] Polylactic acid (PLA) is a homopolymer of lactic acid. It is advantageous because it is biodegradable, compostable, recyclable and can be bio-based, notably being obtained primarily from corn.

[0181] Thermoplastic polyurethanes (TPUs) are thermoplastic elastomers (TPEs) of isocyanate block polyurethane. They are advantageous in that they are recyclable and can be bio-based, biodegradable and elastic.

[0182] Very satisfactory results were obtained with a bio-based polyurethane dispersion based on one of the following products: Impranil® DL 1545, Impranil® DL 1126, Impranil® DL 2611 / 1, Impranil® DLP, Impranil® 43031 and Impranil® DL 1380 from COVESTRO.

[0183] Very satisfactory tests were also obtained with a rosin dispersion based on Dermulsene A 7510® (Brookfield viscosity at 20 °C, 50 min-1, mPa.s: 600) and from a rosin solution based on Dermulsene TR 602® (Brookfield viscosity at 20 °C, 50 min-1, mPa.s: 800) from LES DERIVES RESINIQUES ET TERPENIQUES (DRT).

[0184] Among the bio-based water-soluble polymers that can be used, the following binders can also be mentioned: • the natural polymer, 100% bio-based and biodegradable from LACTIPS, which can provide water-soluble properties to a piece of textile 1; • vinyl ethylene acetate (VAE), a water-soluble thermoplastic polymer that can be derived from bio-based sources; • Polyvinyl alcohol (PVA), a water-soluble polymer that can be produced from renewable raw materials; • polyethylene glycol (PEG), also known as polyethylene oxide (PEO) and poly(oxyethylene) (POE), a water-soluble linear polyether polymer that can also be used as a thickening agent and can be derived from renewable resources; • polyvinylpyrrolidone (PVP), a water-soluble polymer that can be used as an emulsifier and stabilizer and can be produced from bio-based sources; • ExpertGel®, a water-soluble thermogelling polymer developed by PolymerExpert, derived from natural oils; and • EstoGel® Green, a bio-sourced rheology modifier also developed by POLYMEREXPERT, a biodegradable oily gelling and shear-thinning agent, 100% of origin, which allows great versatility in terms of textures and visuals and flexibility in its use.

[0185] According to one embodiment, the water-soluble binder comprises at least 10%, preferably at least 20% and more preferably at least 30% by weight of electrically conductive polymer.

[0186] The process according to the invention also uses a filler consisting of loose fibers and / or a powder. At least 5% by weight of the filler is bio-based. Depending on the sprayed layers and the materials chosen, 5 to 70%, preferably 10 to 60%, and more preferably 20 to 50% by weight of the filler is bio-based.

[0187] The filler improves the texture and consistency of the final textile part 1, increasing its durability. It can also provide additional properties, particularly when it contains a bridging agent. When it is bio-based, it is environmentally friendly.

[0188] In addition to adding flexibility and durability to the textile piece 1 by increasing its wear resistance, a fiber filling can provide it with a soft and pleasant texture. Where it is not desired that the inflatable object expand during inflation, such as in the case of a swimming armband or a mattress, a fiber filling is preferred.

[0189] According to one embodiment, 5 to 70%, preferably 30 to 65% and more preferably 40 to 60% by weight of the bio-based filler, consists of viscose fibers, cotton fibers, wool fibers, silk fibers, cashmere fibers, flax fibers, fur fibers, mammal hair, mycelium fibers, cellulose fibers, wood fibers, hemp fibers, mycelium powder, rice powder, wheat powder, wood powder, starch powder, alginate powder, carbon black powder, wheat flour, corn flour, millet flour, hemp flour, rapeseed flour, soybean hull powder, walnut hull powder, olive kernel powder, cellulose nanofiber powder, bio-based polyamide powder or fibers, or polypropylene powder or fibers. bio-based, from bio-based polyethersulfone powder or fibers or from bio-based polyurethane powder or fibers,taken alone or in mixtures.

[0190] According to one embodiment, the liquid composition and / or the filler comprises a water-soluble bridging agent capable of forming ionic and / or covalent bonds with a water-soluble polymer of the binder. Preferably, the bridging agent mainly comprises a culture substrate containing fungal spores cultured therein, fungal mycelium, silicate derivatives, or magnesium chloride derivatives, alone or in mixtures. The bridging agent preferably represents an amount such that, during a formation step E08 of a composite layer 7, before drying, the weight ratio of bridging agent to binder in said composite layer 7 is in the range of 1:100 to 1:1, preferably between 1:10 and 1:4, and more preferably between 2:10 and 3:10.

[0191] For the mushroom mycelium, preferred mushroom species include the following: Pleurotus and subspecies o stratus and eryngii (king oyster mushroom), Ganoderma and subspecies lucidum (reishi) and resinceum, Trametes and subspecies versicolor (Turkish mushroom) and m ulticolor, Cordyceps, Lentinus, Lentinula, Agaricus (for example Agaricus bisporus, known as the button mushroom), Hericium, Schizophylium commune (saw fungus), Fomes fomentarius (birch fungus) and Lentinula edodes (shiitake).

[0192] Bridging agents in powder form are preferentially present in the feedstock, while bridging agents in liquid form are preferentially present in the liquid composition. Of course, if a feedstock is mixed with a liquid composition before spraying, a bridging agent can be added to this mixture.

[0193] According to one embodiment, 5 to 70%, preferably 30 to 65% and more preferably 40 to 60% by weight of the bio-based filler, consists of at least one bio-based material comprising at least 5% by weight of calcium, preferably at least 10% by weight of calcium. Such a material improves the rigidity and strength of the material, while being a natural product. This bio-based material comprising at least 5% by weight of calcium is preferably gypsum powder, limestone powder, bone meal, calcium carbonate powder, or chalk powder.

[0194] When the charge includes powder, this powder preferentially has a narrow particle size distribution in the range of 20 to 100 pm, with an average particle size distribution for example of about 50 pm.

[0195] A liquid composition according to the invention may also comprise from 1 to 30% by weight of an additive suitable for improving the tensile strength, compressive strength and / or water absorption capacity of the resulting textile piece 1. This additive may, for example, be magnesium sulfate and / or sodium sulfate.

[0196] A liquid composition according to the invention may also include a coalescing agent that lowers the minimum film formation temperature (MFT) of aqueous dispersions, allowing the polymers to react more readily at lower temperatures. It acts by reducing the surface tension between the particles, thus facilitating their coalescence.

[0197] Some examples of usable coalescing agents are given in the table below, with preferred concentrations given for each as a percentage by weight relative to the total mass of the liquid composition.

[0198] [Tables] Coalescing Agent Operating Conditions Concentration Eastman's TEXANOL® (2,2,4-trimethyl-1,3-pentanediol monoisobutyrate) Used in water-based spray solutions. 1% to 5% Glycol acetates Used as a coalescing agent in aqueous spray solutions. 0.1% to 10%, preferably 1% to 2% Butyl glycol: Used in water-based spray solutions, 1% to 5%. Fatty acid ester: Used in spray solutions to reduce the minimum layer formation temperature, 2% to 4%. Propylene glycol: Used to improve the adhesion and durability of sprayed layers, 1% to 3%. Ethyl acetate: Used in spray solutions to facilitate drying, 2% to 6%.

[0199] Among the preferred glycol acetates, examples include 2-hexyl-1,3-dioxolane-4-methanol, 2-hexyl-1,3-dioxane-5-ol, 2-hexyl-2-methyl-1,3-dioxolane-4-methanol, and 2-hexyl-2-methyl-1,3-dioxane-5-ol. Ethylene glycol monoethyl ether acetate is a suitable choice because of its favorable atomizing properties and its compatibility with water-based formulations.

[0200] A liquid composition according to the invention may also include at least one pigment. This pigment is preferably water-soluble. It may, for example, be an organic or inorganic pigment, for example, of chemical, mineral, or natural origin. It may also be pigments extracted from fungi or algae. Finally, it may also be disperse, azo, acid, or reactive dyes.

[0201] Some examples of usable pigments are given in the table below.

[0202] [Tables2] Pigment Type / Source Description Iron Oxide Inorganic Used to produce yellow, red, brown, black, and orange pigments. Titanium Dioxide Inorganic Common white pigment, widely used in paints, inks, and plastics. Carbon Black Inorganic Used in black printing inks; highly pigmented and lightfast. Zinc White Inorganic Solid white pigment, valued for its opacity and lightfastness. Prussian Blue Mineral Highly pigmented blue pigment, used in oil and acrylic paints. Cadmium Red Mineral Bright red pigment, known for its durability and lightfastness. Indigo Organic Blue pigment derived from the indigo plant, used for centuries for dyeing. Burnt Sienna Natural Reddish-brown pigment, used in oil and acrylic paints. Vermilion Mineral Bright red pigment, made from mercury sulfide, very opaque and luminous. Pyrrole Orange Organic Synthetic pigment offering a beautiful range of bright reds and oranges. Ganoderma lucidum Pigment Fungus Offers natural hues, including reds, yellows, whites, blacks, and purples, and is biodegradable. Also known for its antibacterial properties. Lentinula edodes Pigment Fungus Pigments offering brown and beige shades. Fornes fomentarius Pigment Fungus Known for its polysaccharides and phenolic compounds, this fungus can be used to obtain natural dyes.Trametes versicolor pigment (fungus) Known for its medicinal properties, this fungus produces pigments that can be used in textile dyes. Schizophyllum commune pigment (fungus) Contains polysaccharides and proteins; this fungus can also provide natural dyes for textiles. Phycoerythrin (red algae such as Porphyridium cruentum) Fluorescent red pigment. Phycocyanin (cyanobacteria and certain red algae) Blue pigment. Chlorophyll (algae) Green pigment. Carotenoid (algae) Yellow, orange, or red pigment.

[0203] It should be noted that other seaweed extracts can be used in the invention in combination with pigments: • Agar: A polysaccharide extracted from certain red algae such as Gelidium and Gracilaria. It can be used as a natural mordanting agent to fix dyes onto cellulosic and protein fibers. • Alginates: Polysaccharides found in brown algae such as Laminaria and Macrocystis. They can be used as thickeners and binders for natural dyes in textile applications. • Carrageenans: Sulfated polysaccharides extracted from red algae such as Chondrus crispus. They improve the fixation and durability of natural dyes on fibers. • Fucoidans: Sulfated polysaccharides found in brown algae. They possess properties similar to carrageenans for textile dyeing.

[0204] A liquid composition according to the invention may also include a water-soluble viscosity-modifying agent. This water-soluble viscosity-modifying agent is preferably polylactic acid, sugar, a polysaccharide derivative, alginate, potato dextrose, agar, glucose, malt, peptone, or yeast extract, taken alone or in mixtures.

[0205] According to one embodiment, the liquid composition has a dynamic viscosity ranging from 0.1 mPa·s at 20 °C for very dilute solutions to several thousand mPa·s at 20 °C, for example, 10,000 mPa·s at 20 °C for solutions concentrated in viscosity-enhancing agent (up to 20% or more), depending on the type of polymer used. For example, polyacrylamides and polyethylene glycols (PEGs) can have specific viscosities of up to 10 mPa·s or more in certain formulations, such as 500 mPa·s or 10,000 mPa·s at 20 °C.

[0206] A liquid composition according to the invention may also include a water-soluble adhesive agent. The adhesive agent may be in the form of an aqueous dispersion of rosin and terpene, both of plant origin. Other examples of water-soluble adhesive agents are given below. Advantageously, most of them are compatible with mycelium-based materials.

[0207] [Tables3] Adhesive Agent Description: Pullulan: Water-soluble, biodegradable polysaccharide produced by the fermentation of tapioca starch by the fungus Aureobasidium pullulans and compatible with mycelium-based materials. Xanthan Gum: Water-soluble polysaccharide produced by the fermentation of the bacterium Xanthomonas campestris and compatible with mycelium-based materials. Can be used as a thickener and stabilizer. Agar: A polysaccharide extracted from algae and compatible with mycelium-based materials. It can also be used as an adhesive. Polyvinylpyrrolidone (PVP): A biocompatible, water-soluble polymer that can be used as a binder and stabilizer. Its compatibility with mycelium-based materials still needs to be confirmed. Dextrin: A polysaccharide derived from starch hydrolysis, used as an adhesive and can be used as a thickening agent. Compatible with mycelium-based materials, readily soluble in water, and biodegradable.

[0208] The invention also relates to the textile piece 1 equipped with an inflation valve 2 obtained by the process, as well as any inflatable article made from it.

[0209] The textile piece 1 according to the invention is particularly distinguished in that it comprises an inflation valve 2 sandwiched between the deposition surface 101 and a composite layer 7 comprising a binder and a filler. Where it does not comprise an inflation valve 2, the textile piece 1 preferably has an average thickness of between 0.1 and 3 mm.

[0210] An inflatable article can be manufactured from the textile piece 1 equipped with an inflation valve 2 obtained by the process.

[0211] By way of example, an inflatable article may be a swimming armband, a buoy, a ball, a mattress, a pillow, an inner tube, etc. It may then, for example, be obtained by assembling said piece of textile 1 with other pieces of textile lacking an inflation valve, according to any known assembly method. This assembly is preferably carried out by welding, and more preferably by ultrasonic welding.

[0212] If the textile piece 1 is manufactured solely by spraying onto a support that can be extracted through the opening 102 of the textile piece 1 and the inflation opening 202 of the inflation valve 2, an inflatable article can also be manufactured from a single piece of textile 1, for example, in an ovoid or spherical shape. By way of example, such an inflatable article could be a balloon bladder, a swimming armband, a travel or camping earmuff, a camping mattress, or any other similar inflatable article.

[0213] It will be noted that one or more of the textile pieces not having an inflation valve can also 2 is obtained by spraying onto a support 3 a composite layer consisting of a liquid composition and a filler resulting from the supply step E01, said composite layer being dried before the textile pieces are assembled together in an airtight manner to form the inflatable object.

[0214] The implementation of the process of the invention requires in particular the use of at least one spraying system 8, comprising one or more spraying units 9. Any suitable spraying system 8 can be used within the framework of the present invention.

[0215] For spraying a liquid composition and / or a charge comprising powder and / or bulk fibers according to the invention, a suitable spraying unit 9 may include, but not limited to, an air-based, airless or electrostatic-based sprayer, and be for example in the form of a spray gun.

[0216] Besides the spraying unit 9, the spraying system 8 may also include one or more fluid displacement devices 10, tanks 11, flow and / or pressure regulators 12, supply pipes 13 and other components known in the art for spraying liquid products or bulk fibers.

[0217] A fluid displacement device 10 allows a liquid, powder, fibers, or composite material to be conveyed from a reservoir 11 to a spraying unit 9. In the case of a liquid or composite material, this is preferably a pump. In the case of a powder or fibers, this is preferably a compressor.

[0218] Each spray unit 9 is preferably variable flow to allow the creation of thicker bands or layers of product in the desired locations.

[0219] A spraying system 8 comprising several spraying units 9 makes it possible in particular to spray the desired quantities of product more quickly and / or to spray different products simultaneously.

[0220] The spraying system 8 may also include one or more positioning devices 14, for example in the form of a fixed, mobile and / or articulated foot, a robotic arm, a cobot or any other suitable known device, allowing a spraying unit 9 and / or the support 3 and / or the textile piece 1 to be moved and oriented in space in a controlled and precise manner. If masks are used, each mask may also be associated with a positioning device 14.

[0221] The spraying system 8 may also include a controller 15 which adjusts, in particular, the position relationship between each spraying unit 9 and the support 3, and which adjusts in real time the flow rate of each spraying unit 9, in particular to precisely control the position, arrangement, and thickness of the sprayed layers. An increase in thickness can be achieved by repeating the spraying on specific areas, by slowing down the movement on specific areas, or by increasing the flow rate of the sprayed product on specific areas.

[0222] The controller 15 can thus control each spray unit 9, each fluid displacement device 10, each flow and / or pressure regulator 12, each positioning device 14 by control lines 17. It can also be connected to a probe provided in each of the tanks 11 in order to measure the quantity of material in each tank 11, and can in particular be provided to warn the operator when this quantity becomes low.

[0223] The controller 15 can also control the mask positioning device 14 if necessary.

[0224] In general, the controller 15 can be provided so as to automate or assist all or part of the process of producing a textile 2 by spraying.

[0225] The controller 15 can be a computer, a terminal, a control cabinet, a workstation or any other electronic device, preferably programmable, capable of controlling each device of the spraying system 8, for example individually and in a particular sequence.

[0226] Each spraying unit 9 may include a single spray nozzle 11 (see [Fig. 21] and [Fig. 23]) or several (see [Fig. 22] and [Fig. 24]), the latter being oriented in the same direction or in different directions, for example converging towards a point located at an ideal spraying distance. Each spray nozzle 11 may spray the same material or different materials.

[0227] Each spray nozzle 11 can be provided to spray a liquid composition, fibers, a powder or a composite mixture according to the invention, each spray nozzle 11 being in particular connected to a suitable product reservoir 11 via a supply pipe 13.

[0228] In [[Fig. 21] given by way of example, two spraying units 9, each comprising a single spray nozzle 11, are provided on either side of a flat piece of textile 1 on which an inflation valve 2 is fixed for its integration by spraying. The piece of textile 1 is mounted on a positioning device 14 articulated and rotatable about a vertical axis so that the two spraying units 9, themselves mounted on an articulated positioning device 14, can spray their respective products over the entire deposition surface 101. In this example, having two spraying units 9 makes it possible, for example, to spray two different products, either simultaneously or one after the other, these two products each being a liquid composition, a filler, or a composite mixture of the two.

[0229] In [Fig. 22], also given by way of example, a single spraying unit 9 comprising two spray nozzles 11 is provided near a flat piece of textile 1 on which an inflation valve 2 is fixed for its integration by spraying, each spray nozzle 11 being connected to its own reservoir 11. The support 3 and the spraying unit 9 are each mounted on an articulated positioning device 14. In this example, the fact Having two spray nozzles 11 allows, for example, two different products to be sprayed with a single spray unit 9, either at the same time or one after the other, these two products each being a liquid composition, a filler or a composite mixture of the two.

[0230] Finally, in the example illustrated in [Fig. 23], a single spraying unit 9 comprising a single spray nozzle 11 is provided near a hemispherical textile piece 1 positioned on a spherical support 3 and on which an inflation valve 2 is fixed for its integration by spraying. The textile piece 1 and the spraying unit 9 are each mounted on an articulated positioning device 14. This assembly, comprising only a single spray nozzle 11, is preferably intended for spraying a composite mixture comprising a liquid composition and a filler.

[0231] The example illustrated on [Fig.24] will be described later in an example of implementation of the method of the invention.

[0232] It should be noted that the examples illustrated in [Fig. 21] to [Fig. 24] are highly schematic and do not necessarily represent reality. In the examples illustrated in [Fig. 21] to [Fig. 23], each spray nozzle 11 is connected to a single, dedicated reservoir 11. It is also possible to provide several reservoirs 11, each containing, for example, a different liquid composition and / or charge, which can be connected as needed to the same spray nozzle 11 by means of a quick-connect system. Each spray nozzle 11 can also be connected to several reservoirs 11, for example, via a mixing valve in the form of a multiport valve 18, as illustrated in [Fig. 24].

[0233] In order to control ambient air quality, temperature, and humidity, the means of the invention, in particular the spraying system 8, can be housed in an enclosure 19. Due to the possible presence of robot(s), access to this enclosure 19 can be secured. EXAMPLES OF IMPLEMENTATION

[0234] Examples of liquid compositions

[0235] Six examples of liquid compositions according to the invention are given in the table below. The percentage of each component is given by weight relative to the total mass of the liquid composition.

[0236] [Tables4] % by weight LIQ1 LIQ2 LIQ3 LIQ4 LIQ5 LIQ6 Binder: bio-based polylactic acid 13% 45% 40% Binder: natural latex of plant origin 30% 40% 45% 40% Additive: Magnesium sulfate 1% 5% 1% 24% 2% 1% Bridging agent 10% 10% 24% Pigment: Azorubine dye El32 2% 5% 2% 1% 3% 5% Viscosity agent: Potato dextrose 25% Adhesive agent: α-1,4-α-α,6-glucan (pullulan) 22% Aqueous solvent: Water 44% 40% 30% 30% 30% 30% Total 100% 100% 100% 100% 100% 100%

[0237] Examples of loads

[0238] Six examples of loads according to the invention are given in the table below. The percentage of each component is given by weight relative to the total mass of the load.

[0239] [Tables5] % by weight CH1 CH2 CH3 CH4 CH5 CH6 Fur fibers (bio-based) 30% 55% 35% 40% 15% Limestone powder (bio-based) 40% 60% 30% 30% 35% Synthetic polyurethane fibers 30% 40% 45% 35% 30% 50% Total 100% 100% 100% 100% 100% 100%

[0240] Examples of composite layers

[0241] Six generic examples of composition for a composite layer 7 according to the invention are given in the table below. The percentage of each component is given by weight relative to the total mass of the composite layer 7 before it dries.

[0242] [Tableauxô] % by weight CCG1 CCG2 CCG3 CCG4 CCG5 CCG6 Non-bio-based binder 15% 30% 10% 40% 10% Bio-based binder 15% 10% 32% 33% 5% 37% Non-bio-based filler 15% 18% 10% 13% 18% 24% Bio-based filler 15% 12% 20% 21% 12% 6% Coalescing agent 1% 0.1% 5% 3% 0.1% 2% Water 39% 29.9% 23% 30% 29.9% 21% Total 100% 100% 100% 100% 100% 100%

[0243] Three specific examples of compositions for a composite layer 7 according to the invention are given in the table below. The composition of layer CC2 is an example of a preferred composition according to the invention. The percentage of each component is given by weight relative to the total mass of the composite layer 7 before it dries.

[0244] [Tables7] % by weight CCI CC2 CC3 Bio-based binder: Impranil® DL 43031 56% Bio-based binder: Impranil® CQ DLU 35% Bio-based binder: Impranil® DL 2611 / 1 55% Non-bio-based filler: synthetic polyurethane fibers 15% Bio-based filler: calcium carbonate powder 10% 2% 3% Bio-based filler: mycelium powder 16% Coalescing agent: ethylene glycol monoethyl ether acetate 4% 2% 8% Water 30% 30% 34% Total 100% 100% 100%

[0245] In this table, examples CCI, CC2 and CC3 each represent the composition of a composite layer 7 whose superposition can, for example, be used for the manufacture of a swimming armband in which an inflation valve 2 is integrated.

[0246] Example CC relates to an inner layer of the swimming armband composed mainly of Impranil® DL 43031, which is a very flexible layer to allow good adaptation to the shape of the arm and resistant, which is crucial for comfort in contact with the skin.

[0247] Example CC2 relates to an intermediate layer of the swimming armband providing good elasticity and abrasion resistance, the fiber and mycelium fillers of which protect the armband against tearing during movement in the water. The mycelium powder and synthetic polyurethane fibers, in addition to providing durability and flexibility, offer additional impact protection while maintaining the lightness required for an inflatable armband.

[0248] Example CC3 relates to a first outer layer of the swimming armband, which is a layer composed mainly of Impranil® DL 2611 / 1, offering excellent water and UV resistance, ensuring that the armband remains waterproof and durable against the elements. Calcium carbonate powder reinforces the structure While improving abrasion resistance, which is essential for a product exposed to varied conditions of use, glycol acetate helps maintain the material's flexibility while facilitating the spray application process.

[0249] These three layers are sprayed in the order below to form a swimming armband with straps. A final assembly step for attaching the straps, buckles, and options will be required: • CCI: inner layer of the swimming armband. • CC2: intermediate layer. • CC3: outer layer of the swimming armband.

[0250] The parameters for the formation of these three layers are given in the table below.

[0251] [Tables8] CCI parameter CC2 CC3 Spraying time 2x2 minutes 2x2+1 minutes 2x2 minutes Spraying pressure 70 bar 80 bar 70 bar Thickness 0.5 mm 0.5 mm 0.5 mm Drying temperature 90 °C 90 °C 90 °C Drying time 2 to 5 minutes 2 to 5 minutes 2 to 5 minutes

[0252] Example of implementation of the process

[0253] An example of implementing the method of the invention according to the invention is given below for the manufacture of a swimming armband.

[0254] A complete cleaning of the equipment used is carried out beforehand, in particular the spraying systems 3. The working environment must be clean to guarantee the quality of spraying (no fibers, clean surfaces, filtered air and controlled air quality to eliminate foreign particles).

[0255] Temperature and humidity are controlled at 20 °C and 80% respectively.

[0256] The equipment used is housed in an enclosure. It consists of the following equipment. Its number is also indicated in parentheses. • 19" enclosure measuring 4.10 x 5.40 x 2.40 m including lighting, security door and window, camera, security sensors and door closing contact (xl). • Enclosure air filtration devices (x4). • Air conditioning and humidity control device for the enclosure (xl). • 9 spray units (x3) • Spray nozzles 16 (x3) each fitting a spray unit 9, comprising two nozzles 16a, 16b suitable for spraying a composite mixture and one nozzle 16c suitable for spraying loose fibers. • Tanks 11 (x3), including two tanks 1 la,l 1b for liquid composite mixture and one tank 1 le for loose fibers. • Multi-way valve 18, in the form of a mixing solenoid valve, suitable for connecting each spray nozzle 16a, 16b, 16c to one of the tanks 11a, 11b, 11c. • Fluid displacement devices 10 (x3) each associated with one of the reservoirs 11 to supply the multi-way valve 18 with fluid, two fluid displacement devices 10a, 10b being pumps connected to the reservoirs 11a, 11b for composite mixture, while the last fluid displacement device 10c is a compressor connected to the reservoir 1 for fibers. • Flow and / or pressure regulators 12 (x3) in the form of solenoid valves 12a, 12b, 12c each associated with one of the fluid supply lines of the multi-way valve 18 from the tanks 1 la, l lb, l le. • Polymer supply pipes 13 (x3) each connecting the multi-way valve 18 to a spray nozzle. • Polymer supply pipes 13 (x3) each connecting a tank 11, to the multiport valve 18, as well as to the flow and / or pressure regulator 12 and the associated fluid displacement device 10. • Positioning device 14 (xl) for the spraying unit 9 in the form of a cobot 14a. • Support 3 (xl) in the form of six plates the size of the cuff laid flat. • Positioning device 14 (xl) for support 3 in the form of a articulated arm 14b. • Drying system (xl). • Plasma processing unit (xl). • Controller 15 (xl), in the form of a control cabinet for the spraying units 9, the multi-way valve 18, the solenoid valves 12a, 12b, 12c, the pumps 10a, 10b, the compressor 5c, the cobot 14a and the articulated arm 14b with a touch screen, synchronizing in particular the articulated arm 14b and the cobot 14a. • Electrical cabinet (xl) and electrical cables to supply the various devices with electricity.

[0257] For clarity of figures, only part of this equipment is illustrated schematically and in a simplified manner on [Fig.24].

[0258] As a reminder, a cobot, or collaborative robot, is a robot designed for direct human-robot interaction within a space where humans and robots are in close proximity.

[0259] To prepare the swimming armband, three composite layers CCI, CC2, and CC3 are required, as well as at least one support 3 in the form of six plates to receive the prepared solutions. The composition of these three composite layers CCI, CC2, and CC3 is given in Table 7 above.

[0260] In this example, the six plates of the support 3 make it possible to produce six textile sides by spraying which, after assembly, make it possible to produce three armbands, each composed of two sprayed layers.

[0261] The six plates of support 3 are made of TPU using 3D printing, which offers versatility and responsiveness for testing numerous design options. Three plates are solid, while three plates are perforated and each has a 302 orifice for positioning the valves during spraying. Once the six plates are produced, they are coated with silicone to facilitate demolding of the textile side panels after spraying.

[0262] In this example, we assumed that five liters of composite material (liquid composition + filler) for spraying would be required. To facilitate the start-up of the installation and to achieve the required pressure and homogeneous spraying conditions, 10 liters of composite material were produced. Indeed, to ensure a constant supply pressure to the spraying units, it is important to have enough solution to prevent the pumps from cavitating.

[0263] The composition by weight (Kg) for each layer is given in the table below

[0264] [Tables9] Weight in kg CCI CC2 CC3 Bio-based binder: Impranil® DL 43031 5.60 Bio-based binder: Impranil® CQ DLU 3.50 Bio-based binder: Impranil® DL 2611 / 1 5.50 Non-bio-based filler: synthetic polyurethane fibers 1.50 Bio-based filler: calcium carbonate powder 1.00 0.20 0.30 Bio-based filler: mycelium powder 1.60 Coalescing agent: ethylene glycol monoethyl ether acetate 0.40 0.20 0.80 Water 3.00 3.00 3.40 Total 10.00 10.00 10.00

[0265] The preparation of the mixtures for the first CC3 composite layer, which is the layer that will be sprayed first (inside of the swimming armband), is carried out by the following steps: • draining and cleaning of the three tanks 1 la, l lb, l le, of the pumps 10a, 10b, of the compressor 10c and of the spraying unit 9, in particular of the three spray nozzles 16a, 16b, 16c, although only one will be used here, namely the first spray nozzle 16a suitable for spraying a composite mixture; • weighing of the binder, i.e. 5.6 kg of Impranil® DL 430301; • weighing of the water, divided into two equal volumes, i.e. 1.5 kg each; • weighing of the bio-based feed (calcium carbonate powder) divided into two equal volumes, i.e. 0.5 kg each; • weighing of the coalescing agent (ethylene glycol monoethyl ether acetate) divided into two equal volumes, i.e. 0.2 kg each; • mixture of 5.6 kg of Impranil® DL 430301 with 1.5 kg of water, 0.2 kg of coalescing agent and 0.5 kg of bio-based filler, i.e.: 5.6 + 1.5 + 0.2 + 0.5 = 7.8 kg of a first mixture designated as Ml; • mixture of 1.5 kg of water, 0.2 kg of coalescing agent, and 0.5 kg of bio-based filler, i.e.: 1.5 + 0.2 + 0.5 = 2.2 kg of a second mixture designated as M2; • filling the first tank 1 with 7.8 kg of the Ml mixture; and • filling the second tank 11b with the 2.2 kg of mixture M2.

[0266] The contents of the first and second reservoirs 1a,l 1b are summarized in the table below:

[0267] [TableauxlO] Weight in kg CCI Tank 1 1a Tank 11b Bio-based binder: Vytex® 5.60 5.60 Bio-based filler: calcium carbonate powder 1.00 0.50 0.50 Bio-based filler: mycelium powder Coalescing agent: ethylene glycol monoethyl ether acetate 0.40 0.20 0.20 Water 3.00 1.50 1.50 Total 10.00 7.80 2.20

[0268] A trial adjustment of the spraying system is then performed. For this purpose, the two pumps 10a, 10b connected to the first and second tanks 11a, 11b are started, and the spraying unit is first supplied with compressed air at 4 bar to ensure that the first and second spray nozzles 16a, 11b are not obstructed. The six plates of the support 3 are also put in place, with the plates spaced 20 cm apart so that, with the adjustments to the spraying unit, there are no impacts on homogeneity when the cobot moves the spraying unit from one plate to another.

[0269] After this, the spray unit's work program is defined for the first pass. With the spray plates and lugs positioned, the cobot's collaborative work function is used. The spray unit is positioned on the cobot's arm. The operator's experience allows them to define a trajectory suitable for spraying the composite mixture all around the volumes composing the swimming armband. To do this, the operator manually moves the spray unit within the space covering all the plates, carefully passing it over the lugs. When this step is completed, the trajectory is recorded. One step consists of verifying this trajectory by running the cobot without a load until an OK signal is obtained. This OK is confirmed by adding compressed air to the spray nozzles to ensure the correct distance of each nozzle from the application surface.Flour, previously deposited using a fine mesh sieve (120 mesh nylon filter), is used on the spray plates to observe, as the spray unit passes over them with compressed air, whether the flour is properly cleaned. If this is not the case, the trajectory is optimized directly in the program.

[0270] To continue, the spray unit's work program is defined for a second pass at a 90° angle to the first pass, in order to achieve an isotropic effect. The plates to be sprayed remain in the same position as before. The spray unit is positioned on the cobot arm, oriented at 90° to its previous orientation. The operator's experience allows them to define a trajectory suitable for spraying the composite mixture. To do this, the operator manually moves the spray unit within the space to cover all the plates to be sprayed and the lugs. Once this step is completed, the trajectory is recorded. One step consists of verifying this trajectory by running the cobot without a load until a "OK" signal is obtained. This "OK" is confirmed by adding compressed air to the spray nozzles to ensure the correct distance of each nozzle from the deposition surface.Flour is used, which has been previously placed using a sieve. A fine mesh filter (120 mesh nylon filter) is used on all volumes to be sprayed to observe, as the spray unit passes over them with compressed air, whether the flour is properly cleaned. If this is not the case, the trajectory is optimized directly within the program.

[0271] The following table summarizes the parameters of the experiments carried out and the results obtained:

[0272] [Tables II] Spray Power (W) Nozzle Diameter (mm) Spray Flow Rate (ml / min) 410-600 0.5 100-150 600-800 0.8 200-300 800-1200 1-2 300-500 Spray Distance (cm) Spray Time (min) Number of Passes 20-30 10-15 3-4 15-20 5-10 2-3 10-15 3-5 1-2

[0273] Spraying power: pump power, which influences flow rate and pressure, affecting spray quality.

[0274] Spray nozzle diameter: a smaller diameter allows for finer spraying, while a larger diameter increases flow rate and coverage.

[0275] Spray flow rate: measured in ml / min, it indicates the quantity of composite mixture sprayed per minute.

[0276] Spraying distance: distance between the spray nozzle and the deposition surface, generally between 10 and 30 cm depending on the type of application.

[0277] Spraying time: time required to cover the deposition surface 101, depending on the flow rate and the number of passes.

[0278] Number of passes: number of layers required to obtain uniform coverage, often recommended between 1 and 3 depending on the type of composite mixture sprayed and the condition of the deposition surface.

[0279] In this example, the composite mixture is quite viscous and the parameters chosen for the two passes are as follows: • Spraying power: 1200 Watts • Nozzle diameter: 1 mm • Spray rate: 500 ml / min • Spraying distance: 15 cm • Spraying time: 2 minutes per pass • Number of passes: 2

[0280] At that time, we therefore have two prepared composite mixtures M1 and M2 contained respectively in the first tank 11a and in the second tank 11b, six positioned plates, two validated trajectories in empty and validated spraying parameters.

[0281] The pumps 10a,10b and the solenoid valves 12a,12b associated with them are suitable for supplying the first nozzle 16a with the two mixtures M1,M2, the first nozzle 16a being adapted for spraying the CCI layer, that is to say that the diameter of the first nozzle 16a as well as the pressure are chosen as specified above.

[0282] With the prepared composite mixtures M1 and M2 mixed in the multiport valve 18, spray tests are then carried out via the first nozzle 16a on an adjacent surface to prime the pumps 10a, 10b and ensure that the flow rate is constant. The solenoid valves 12a, 12b and the pumps 10a, 10b are controlled to guarantee a homogeneous mixture. It is also verified that the composite mixtures M1 and M2 are available for spraying.

[0283] A silicone coating is applied to three positioning lugs 4 to facilitate demolding the cuff side obtained after spraying. A positioning lug 4 is then positioned in the orifice 302 of each of the three perforated plates (see [Fig. 1 1]). These positioning lugs 4 create the necessary passage for both positioning the inflation valve 2 and allowing air to pass through all the layers of the cuff side to inflate the cuff made from it.

[0284] The spraying program is now launched with two spray passes using the M1+M2 mixtures through the first nozzle 16a to cover the six plates, in two opposite directions (see Fig. 12). For each spray of the CCI layer, the spraying time is 2 minutes per pass, with a spraying pressure of 70 bar.

[0285] This spray program is followed by drying the CCI layer at 90 °C with circulating hot air for 2 minutes.

[0286] For each perforated plate, an inflation valve 2 is positioned on the CCI layer (see [Fig. 13]), the cap 205 of which is removed from the inflation orifice 202. Once an inflation valve 2 is centered on the positioning lug 4, a guard 5 is put in place, and then a fixing screw 6 is screwed into the internal threaded channel 402 of the positioning lug 4 and into the internal threaded channel 502 of the stem 501 of the guard 5 to assemble these two parts (see [Fig. 15]). The fixing screw 6 positions the positioning lugs 4 and the guards 5 by tightening and ensures both the perfect positioning of the inflation valve 2 on the CCI layer and the seal between a protection 5 and an inflation valve 2 itself.

[0287] It should be noted that in [Fig. 14] to [Fig. 20], the collar 204 of the inflation valve 2 is partially embedded in the base composite layer 71, whereas in the example described here, the collar 204 of the inflation valve 2 is placed on the CCI layer after the latter has dried. Therefore, to illustrate this example, reference can be made to [Fig. 14] to [Fig. 20], but considering that the collar 204 of the inflation valve 2 is placed on the CCI layer and not partially embedded in it.

[0288] We then have the first composite layer CCI constituting a piece of textile 1 for six cuff sides, three of which have an inflation valve 2 positioned, immobilized and partially protected.

[0289] The second composite layer CC2 is then deposited. To do this, the material is prepared as indicated below.

[0290] The preparation of the mixtures for the second composite layer CC2, which is the intermediate layer, is carried out by the following steps: • draining and cleaning of the first and second tanks 1a,l 1b, of the two pumps 10a,10b and of the spraying unit 9, in particular of the two nozzles 16a, 16b adapted for spraying a composite mixture, even if only one will be used here, as well as the nozzle 16c adapted for spraying loose fibers which has already been cleaned; • weighing of the binder, i.e. 3.5 kg of Impranil® CQ DLU; • weighing of the water, divided into two equal volumes, i.e. 1.5 kg each; • weighing of the bio-based load (0.1 kg of calcium carbonate powder and 0.8 kg of Agaricus bisporus mycelium powder) divided into two equal volumes, i.e. 0.9 kg each; • weighing of the non-bio-based charge (1.3 kg of synthetic polyurethane fibers); • weighing of the coalescing agent (ethylene glycol monoethyl ether acetate) divided into two equal volumes, i.e. 0.1 kg each; • mixture of 3.5 kg of Impranil® cQ DLU with 1.5 kg of water, 0.1 kg of coalescing agent and 0.9 kg of bio-based filler, i.e.: 3.5 + 1.5 + 0.1 + 0.9 = 6 kg of a first mixture designated as M3; • mixture of 1.5 kg of water, 0.1 kg of coalescing agent and 0.9 kg of bio-based filler, i.e.: 1.5 + 0.1 + 0.9 = 2.5 kg of a second mixture designated as M4; • filling the first tank 1 with the 6 kg of M3 mixture; • filling the second tank 11b with 2.5 kg of M4 mixture; and • filling the third tank 1 with the 1.5 kg of synthetic polyurethane fibers.

[0291] The contents of the three tanks 1 la, l lb, l le are summarized in the table below:

[0292] [Tables 12] Weight in kg CC2 Tank 1 1a Tank 1 1b Tank 1 1c Bio-based binder: Impranil® CQ DLU 3.50 3.50 Non-bio-based filler: synthetic polyurethane fibers 1.50 1.50 Bio-based filler: calcium carbonate powder 0.20 0.10 0.10 Bio-based filler: mycelium powder 1.60 0.80 0.80 Coalescing agent: ethylene glycol monoethyl ether acetate 0.20 0.10 0.10 Water 3.00 1.50 1.50 Total 10.00 6.00 2.50 1.50

[0293] A trial adjustment of the spraying system is then performed with the second nozzle 16b, adapted for spraying the second composite mixture M3+M4, and with the third nozzle 16c, whose larger diameter is adapted for spraying loose fibers. For this purpose, the pumps 10a, 10b and the compressor 10c, connected to the three tanks 11a, 11lb, 11le, are started, and the spraying unit 9 is initially supplied with compressed air at 4 bar to ensure that the second nozzle 11b and the third nozzle 16c are not obstructed. The six plates remain in the position they were in for spraying the first CCI layer.

[0294] For the first pass, the same working program of the spraying unit is used as for the first CCI coat.

[0295] Similarly, for the second 90° pass, the same spray unit work program is used as for the first CCI coat.

[0296] The parameters chosen for the two passes are as follows: • Spraying power: 1000 Watts • Nozzle diameter: 2 mm • Spray rate: 400 ml / min • Spraying distance: 15 cm • Spraying time: 2 minutes per pass • Number of passes: 2

[0297] At that time, we therefore have two prepared composite mixtures M3 and M4, a non-bio-based filler in the form of synthetic polyurethane fibers, six positioned support plates, three of which have a positioning lug 4 and a protection 5 protecting the inflation valves 2, two validated trajectories in empty and validated spraying parameters.

[0298] With the prepared composite mixtures M3 and M4 mixed in the multiport valve 18, spray tests are then carried out via the second nozzle 16b on an adjacent surface to prime the pumps 10a and 10b and ensure that the flow rate is constant. The solenoid valves 12a and 12b and the pumps 10a and 10b are controlled to guarantee a homogeneous mixture. Spray tests are also carried out with the synthetic polyurethane fibers via the third nozzle 11 on an adjacent surface to prime the compressor 5c and ensure that the flow rate is constant. It is also verified that the composite mixtures M3 and M4 and the synthetic polyurethane fibers are available for spraying.

[0299] The CC2 layer spraying program is now launched. It begins with two spray passes using the M3+M4 mixture through the second nozzle 16b to cover the six plates in two opposite directions, thus creating the first layer of the CC2 layer. Next, a spray pass using the synthetic polyurethane fibers through the third nozzle 16c covers the first layer of the CC2 layer, creating the second layer. Finally, two more spray passes using the M3+M4 mixture through the second nozzle 16b cover the second layer of the CC2 layer, creating the final layer.

[0300] For each spraying, the spraying time is 1 minute per pass for the first layer, then 1 minute for the second layer and finally 1 minute per pass for the last layer, i.e. a total of 2xl + l + 2xl = 5 minutes, with a spraying pressure of 80 bars.

[0301] During these sprayings, for the three plates without an inflation valve 2, the CC2 layer completely covers the CCI layer, while for the other three the CC2 layer covers the part of the CCI layer which is not covered by the collar 204 of the inflation valve 2 and also covers a part of the perimeter of the collar 204 which is not covered by the protection 5.

[0302] This spray program is followed by drying the CC2 layer at 90°C with circulating hot air for 2 minutes.

[0303] This step is completed by a stabilization treatment using an atmospheric plasma at 200 Watts for 1 minute. The gas used is oxygen O2 for

[0304]

[0305]

[0306]

[0307]

[0308] improve the hydrophilicity of the filler fibers and ensure better adhesion with the binder. We then have the first and second composite layers CCI and CC2 of the cuff sides among which, for the plates where an inflation valve 2 has been put in place, a part of the perimeter of each collar 204 is sandwiched between a CCI layer and a CC2 layer. Next, the third and final CC3 composite layer is applied. To do this, the material is prepared as described below. The preparation of the mixtures for the third and final CC3 composite layer is carried out through the following steps: • draining and cleaning of all tanks 1 la, l lb, l le, pumps 10a, 10b, compressor 10c and spraying unit 9, including the three spray nozzles 16a, 16b, 16c, although only one will be used here, namely the first spray nozzle 16a suitable for spraying a composite mixture; • weighing of the binder, i.e. 5.5 kg of Impranil® DL 2611 / 1; • weighing of the water, divided into two equal volumes, i.e. 1.7 kg each; • weighing of the bio-based load, i.e. 0.3 kg of carbonate powder calcium, divided into two equal volumes, i.e. 0.15 kg each; • weighing of the coalescing agent (ethylene glycol monoethyl ether acetate) divided into two equal volumes, i.e. 0.4 kg each; • mixture of 5.5 kg of Impranil® DL 2611 / 1 with 1.7 kg of water, 0.4 kg of coalescing agent and 0.15 kg of bio-based filler, i.e.: 5.5 + 1.7 + 0.4 + 0.15 = 7.75 kg of a first mixture designated as M5; • mixture of 1.7 kg of water, 0.4 kg of coalescing agent and 0.15 kg of bio-based filler, i.e.: 1.7 + 0.4 + 0.15 = 2.25 kg of a second mixture designated as M6; • filling the first tank 1 with 7.75 kg of M5 mixture; and • filling the second tank 11b with 2.25 kg of M6 mixture. The contents of the first and second reservoirs 1a,l 1b are summarized in the table below. After : [Tables 13] Weight in kg CC3 Tank 1 1a Tank 11b Bio-based binder: Impranil® DL 2611 / 1 5.50 5.50 Bio-based filler: calcium carbonate powder 0.30 0.15 0.15 Coalescing agent: ethylene glycol monoethyl ether acetate 0.80 0.40 0.40 Water 3.40 1.70 1.70 Total 10.00 7.75 2.25

[0309] A trial adjustment of the spraying system is then carried out. For this purpose, the two pumps 10a, 10b connected to the first and second reservoirs 11a, 11b are started, and the spraying unit is initially supplied with compressed air at 4 bar to ensure that the first and second spray nozzles 16a, 11b are not obstructed. The six plates of the support 3 remain in the position they were in for spraying the two previous coats C1 and CC2.

[0310] For the first pass, the same working program of the spraying unit is used as for the two previous coats CCI and CC2.

[0311] Similarly, for the second 90° pass, the same working program of the spraying unit is used as for the two previous coats CCI and CC2.

[0312] The parameters chosen for the two passes are as follows: • Spraying power: 1200 Watts • Nozzle diameter: 2 mm • Spray rate: 500 ml / min • Spraying distance: 15 cm • Spraying time: 2 minutes per pass • Number of passes: 2

[0313] At that time, we therefore have two prepared composite mixtures M5 and M6, six positioned plates, two validated trajectories in a vacuum and validated spraying parameters.

[0314] The pumps 10a, 10b and the solenoid valves 12a, 12b associated with them are suitable for supplying the first nozzle 16a with the two mixtures M5,M6, the first nozzle 16a being adapted for spraying the CC3 layer, that is to say that the diameter of the first nozzle 16a as well as the pressure are adjusted as specified above.

[0315] With the prepared composite mixtures M5 and M6 mixed in the multiport valve 18, spray tests are then carried out via the first nozzle 16a onto an adjacent surface to prime the pumps 10a, 10b and ensure that the flow rate is constant. The solenoid valves 12a, 12b and the pumps 10a, 10b are controlled to guarantee a homogeneous mixture. It is also verified that the composite mixtures M5 and M6 are available for spraying.

[0316] The spray program is now launched with two spray passes with the M5+M6 mixtures through the first nozzle 16a to cover the six plates of the support 3, in two opposite directions.

[0317] For each spraying of the CC3 layer, the spraying time is 2 minutes per pass, with a spraying pressure of 70 bar.

[0318] This spray program is followed by drying at 90 °C with circulating hot air for 2 minutes.

[0319] This step is completed by a stabilization treatment of the CC3 layer once it is dry, using an atmospheric plasma at 200 Watts for 1 minute. The gas used is fluorinated gas CF4 to make the external surface more hydrophobic.

[0320] After drying and stabilization treatment, the three fixing screws 6 are removed to free the three positioning lugs 4 and the three protective covers 5, which are then removed. The six textile cuff sides resulting from the superposition of the sprayed layers are demolded from their respective support plates 3 and stored in open air. Quality checks (dimensional, weight) are carried out.

[0321] The three textile cuff sides, each equipped with an inflation valve 2, require a finishing step consisting of ultrasonically welding said inflation valve 2 to the cuff side. This step reinforces the adhesion of the inflation valve 2 to the three sprayed layers CCI, CC2, and CC3.

[0322] To manufacture the swimming armbands in 3D, various operations are necessary after these steps of manufacturing the armband sides in textile by spraying.

[0323] A first positioning step consists of superimposing a textile armband side without a valve with an armband side equipped with an inflation valve 2. The assembly is carried out by bringing the CCI layers into contact opposite each other, with the inflation valve 2 remaining on the outside.

[0324] A second assembly step consists of joining the textile cuff sides, matched in the previous step, by ultrasonic welding. The shape of the welding tools ensures that the design of the resulting cuff is maintained.

[0325] After this assembly, in the weld zone, 0.5 mm of material is removed all around the perimeter of the resulting inflatable cuff. This limits edge effects related to spraying at the edges of the plates and ensures weld performance. It also contributes to a better aesthetic finish of the resulting inflatable cuff.

[0326] A series of type approval tests by pressure testing is carried out as well as a measurement of the pressure over time for example, in compliance with the standards in force.

[0327] Although described through a number of examples, variants and embodiments, the process according to the invention includes various variants, modifications and improvements which will be obvious to a person skilled in the art, it being understood that these variants, modifications and improvements form part of the scope of the invention.

Claims

1. Demands Method for integrating an inflation valve (2) onto a piece of textile (1) comprising the following successive steps: - supply (E01) of a piece of textile (1), an inflation valve (2) and at least one liquid composition and at least one sprayable charge, this supply step (E01) comprising the following sub-steps: • supply (E02) of a piece of textile (1) having a deposit surface (101) having an orifice (102); • supply (E03) of an inflation valve (2) comprising a tubular valve body (201) having an inflation orifice (202) at one end and a base (203) equipped with a collar (204) at the opposite end, said collar (204) having a diameter greater than that of the orifice (102) of the textile piece (1); • supply (E04) of at least one liquid composition comprising a binder; • supply (E05) of a charge consisting of loose fibres and / or a powder; - immobilization (E06) of the inflation valve (2) on the deposition surface (101) with the collar (204) centered on the orifice (102) of the textile piece (1); - formation (E08) on the deposition surface (101) and on the collar (204) of the same airtight composite layer (7), said composite layer (7) being made up of a liquid composition and a filler resulting from the supply step (E01), this formation step (E08) comprising the following sub-steps: • spraying (E09) onto the deposition surface (101) and onto the collar (204) of a liquid composition resulting from the supply step (E01); and • spraying (E10) onto the deposition surface (101) and onto the collar (204) of a charge consisting of loose fibers and / or a powder resulting from the supply step (E01); • the spraying substep (E10) of a charge being simultaneous with or subsequent to the spraying substep (E09) of the liquid composition; and - drying (E1) of the composite layer (7) resulting from the formation step (E08).

2. A method according to claim 1, characterized in that, during the substep of supplying (E02) a piece of textile (1), said piece of textile (1) is obtained by spraying onto a support (3) a composite layer (7) consisting of a liquid composition and a filler resulting from the supply step (E01), said composite layer (7) being dried before or after the immobilization step (E06) of the inflation valve (2) on the deposition surface (101).

3. Method according to claim 2, characterized in that, during the immobilization step (E06) of the inflation valve (2) on the deposition surface (101), this immobilization is achieved by partial immersion of the collar (204) in the composite layer (7) of the textile piece (1) before drying the latter.

4. A method according to any one of the preceding claims, characterized in that the immobilization step (E06) is carried out by gluing, welding or sewing the collar (204) onto the deposition surface (101) of the textile piece (1).

5. A method according to any one of the preceding claims, characterized in that, during the immobilization step (E06), a positioning lug (4) having a support skirt (401) at its base is introduced into the valve body (201) through the orifice (102) of the textile piece (1), said support skirt (401) having a diameter greater than that of the orifice (102) of the textile piece (1) and being then located under the textile piece (1).

6. A method according to any one of the preceding claims, characterized in that, prior to the step of forming (E08) a composite layer (7), it comprises a step of masking (E07) the valve body (201) and the inflation orifice (202) during which a rigid protection (5) is fixed on the inflation valve (2) in order to cover the valve body (201) and the inflation orifice (202).

7. A method according to claim 6, characterized in that the guard (5) comprises a rod (501) which is inserted into the body of valve (201) through the inflation port (202) during the masking step (E07).

8. Method according to claims 5 and 7, characterized in that the positioning lug (4) and the rod (51) each have an internal threaded channel (402,502) of the same diameter and in that, during the masking step (E07), a fixing screw (6) is screwed into the internal threaded channel (402) of the positioning lug (4) and into the internal threaded channel (502) of the rod (501) through the orifice (102), the fixing screw (6) having a head (601) bearing against the support skirt (401) of the positioning lug (4).

9. A method according to any one of the preceding claims, characterized in that, during the drying step (El 1), the textile piece (1) and the inflation valve (2) are subjected to vibrations.

10. A method according to any one of the preceding claims, characterized in that after the drying step (E1), it comprises a formation step (E13) of a topcoat on the composite layer (7) resulting from the formation step (E08) of a composite layer (7), this formation step (E13) of a topcoat comprising the following successive substeps: - spraying (E14) onto the deposition surface (E101) of a liquid composition resulting from the supply step (E04) of at least one liquid composition; and - drying (E15) of the liquid composition sprayed during the preceding spraying substep (E14).

11. A method according to any one of the preceding claims, characterized in that at least one drying step (Eli, E15) is carried out at room temperature.

12. A process according to any one of the preceding claims, characterized in that at least one drying step (Eli, E15) is carried out at a temperature between 50 and 90°C.

13. A method according to any one of the preceding claims, characterized in that after a drying step (Eli, E15), it comprises a stabilization step (El6) of the airtight composite layer (7), this stabilization step (El6) comprising at least one of the following substeps: - a heat treatment; - a plasma treatment; and / or - cross-linking by UV irradiation.

14. A process according to any one of the preceding claims, characterized in that, during the supply substep (E04) of at least one liquid composition comprising a binder, said binder is water-soluble and said liquid composition comprises a water-based solvent in which the binder is dissolved, and the liquid composition is such that: - the binder comprises one or more water-soluble polymers, which represent 30 to 70% by weight of the liquid composition; - the water-based solvent comprises water representing 30 to 70% by weight of the liquid composition.

15. According to one aspect of the invention, during the substep of supplying (E05) at least one charge consisting of loose fibers and / or a powder, at least 5% by weight of said charge is of bio-based origin, which advantageously reduces the carbon footprint of the process.

16. A method according to any one of the preceding claims, characterized in that, during a formation step (E08) of a composite layer (7), the filler represents 30 to 60% by weight of said composite layer (7).

17. A method according to any one of the preceding claims, characterized in that, during a formation step (E08) of a composite layer (7), the weight-loading ratio in said composite layer (7) is in the range between 2:1 and 1-9

18. 1.Z. A method according to any one of the preceding claims, characterized in that, during a formation step (E08) of a composite layer (7), a bio-based filler represents 5 to 50%, preferably 10 to 40% and more preferably 15 to 30% by weight of said composite layer (7).

19. A method according to any one of the preceding claims, characterized in that during the feed supply step (E05), 5 to 70%, preferably 10 to 60% and more preferably 20 to 50% by weight of the feed is of bio-based origin.

20. A method according to any one of the preceding claims, characterized in that during the supply step (E05) of a load, 5 to 70%, preferably 30 to 65% and more preferably 40 to 60% by weight of the bio-based filler, consists of viscose fibers, cotton fibers, wool fibers, silk fibers, cashmere fibers, flax fibers, fur fibers, mammal hair, mycelium fibers, cellulose fibers, wood fibers, hemp fibers, mycelium powder, rice powder, wheat powder, wood powder, starch powder, alginate powder, carbon black powder, wheat flour, corn flour, millet flour, hemp flour, rapeseed flour, soybean hull powder, walnut hull powder, olive kernel powder, cellulose nanofiber powder, polyamide powder or fibers, polypropylene powder or fibers, polyethersulfone powder or fibers, or powder or fibers of polyurethane, taken alone or in mixtures.

21. A method according to any one of the preceding claims, characterized in that during the feed-in step (E05), 5 to 70%, preferably 30 to 65% and more preferably 40 to 60% by weight of the bio-based feed-in are made up of at least one bio-based material comprising at least 5% by weight of calcium, preferably at least 10% by weight of calcium.

22. A process according to any one of the preceding claims, characterized in that during the supply step (E04) of at least one liquid composition, the water-soluble binder comprises at least 10%, preferably at least 30% and more preferably at least 60% by weight of bio-based and / or biodegradable polymer.

23. A process according to any one of the preceding claims, characterized in that during the supply step (E04) of at least one liquid composition, the water-soluble binder comprises at least 5%, preferably at least 30% and more preferably at least 70% by weight of elastomer.

24. A process according to any one of the preceding claims, characterized in that, during the supply step (E04) of at least one liquid composition, the water-soluble binder comprises at least 5%, preferably at least 30% and more preferably at least 70% by weight of natural plant-based latex, plant-based latex treated to reduce its protein content, bio-based polylactic acid, bio-based thermoplastic polyurethane, bio-based polyurethane dispersion, dispersion of plant-based rosin, plant-based terpene dispersion, bio-based acrylic polymer or polymer matrix hydrogel, taken alone or in mixtures.

25. A method according to any one of the preceding claims, characterized in that, during the supply step (E04) of at least one liquid composition or during the supply step (E05) of a filler consisting of loose fibers and / or a powder, the liquid composition or the filler comprises a water-soluble bridging agent capable of forming ionic and / or covalent bonds with the binder.

26. A process according to any one of the preceding claims, characterized in that during the supply step (E04) of at least one liquid composition, the feed comprises a coalescing agent whose quantity represents from 0.1 to 10%, preferably 1 to 5% by weight of the liquid composition.

27. ​​A method according to any one of the preceding claims, characterized in that during the supply step (E04) of at least one liquid composition, said liquid composition comprises at least one pigment.

28. A process according to any one of the preceding claims, characterized in that during the supply step (E04) of at least one liquid composition, said liquid composition comprises a water-soluble viscosity agent.

29. A method according to any one of the preceding claims, characterized in that during the supply step (E04) of at least one liquid composition, said liquid composition has a dynamic viscosity between 0.1 and 10,000 rnPa.s at 20 °C.

30. A method according to any one of the preceding claims, characterized in that during the supply step (E04) of at least one liquid composition, said liquid composition comprises a water-soluble adhesive agent.

31. Textile piece (1) equipped with an inflation valve (2), characterized in that the inflation valve (2) is sandwiched between the deposition surface (101) and a composite layer (7) comprising a binder and a filler, said textile piece (1) equipped with an inflation valve (2) being a product resulting from the process according to any one of the preceding claims.

32. Piece of textile (1) according to claim 31, characterized in that it has an average thickness of between 0.1 and 3 mm.

33. Method of producing a three-dimensional inflatable object (7) by assembling several pieces of textile together in an airtight manner to form said inflatable object (6), characterized in that at least one of said pieces of textile is a piece of textile (1) according to claim 31 or 32.

34. A method for producing a three-dimensional inflatable object (7) according to claim 33, characterized in that at least pieces of textile not having an inflation valve (2) are obtained by spraying onto a support (3) a composite layer (7) consisting of a liquid composition and a filler resulting from the supply step (E01), said composite layer (7) being dried before the textile pieces are assembled together in an airtight manner to form the inflatable object (6).

Images