• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method of injecting a slurry loaded into a fibrous texture (10) having a three-dimensional or multi-layer weave comprises injecting a slurry (150) containing solid particle powder into the volume of the fibrous texture. The injection of the charged suspension (150) is performed by means of at least one hollow needle (120) in communication with a charged suspension supply device (100), each needle being movable in at least one direction (Dv ) extending between a first face (10b) and a second opposite face (10a) of the fibrous texture (10) so as to inject the charged slurry at one or more determined depths into the fibrous texture.
    公开号:FR3071257A1
    申请号:FR1758658
    申请日:2017-09-19
    公开日:2019-03-22
    发明作者:Pascal Diss；Eric Lavasserie
    申请人:Safran Ceramics SA；
    IPC主号:
    专利说明:

    Invention background
    The present invention relates to a method of injecting a suspension loaded into a fibrous texture for the manufacture of parts in composite material by seeing liquid.
    In the field of the preparation of composite materials by the liquid route, numerous variant processes have been developed with the common objective of filling the entire volume available in a fiber preform with a suspension sufficiently charged to obtain the most final porosity. weak possible.
    Among the liquid solutions, one of them consists in using fibrous layers pre-impregnated with a loaded suspension and in draping them over a shaping tool. However, this technique is not compatible with textures having a three-dimensional (3D) or multi-layer (2.5D) weaving. These textures are in fact difficult to impregnate by conventional means, due to the “filter” effect of the texture which prevents the homogeneous penetration of the loaded suspension throughout the thickness of the texture. This type of production process only allows parts made of composite material having a small thickness and a two-dimensional (2D) fibrous reinforcement. The mechanical characteristics of these types of composite material remain limited in certain directions. In particular, these materials have a low resistance to delamination and do not withstand shear forces well.
    There are also injection, infusion or sedimentation type processes, based on the introduction of a diluted charged suspension (having a viscosity adapted to a homogeneous penetration in the texture), and filtered in situ, so as to concentrate it to obtain at the final stage the desired level of porosity. Such a method is notably described in document WO 2016/102839.
    However, in the case of a 3D or 2.5D woven texture, the impregnation of the fibrous texture is long and delicate due to the complex shape and the large thickness of the texture. Thus, the injection or filling phase of the fibrous texture with the loaded suspension is not controlled, which leads to the presence of porosities in the final part. These processes therefore require significant development work, based on:
    - the development of a suitable suspension,
    - modeling of flows within the preform,
    - the development of a specific tool for a given geometry (with in particular the location of the injection and filtration points) and associated process parameters (pressure, temperature, duration, flow, ...).
    These implementation constraints significantly outsource the development and implementation costs. In addition, it is difficult to design an injection tool which adapts to different geometries of the parts to be manufactured.
    Subject and summary of the invention
    The object of the present invention is to remedy the aforementioned drawbacks and to propose a solution which makes it possible to better control the injection or filling phase of a 3D or 2.5D fibrous texture with a charged suspension in order to obtain a material or a part with a very low macroporosity rate while being able to easily adapt to the different geometries of parts envisaged.
    To this end, the invention provides a method of injecting a charged suspension into a fibrous texture having a three-dimensional or multilayer weaving comprising injecting a suspension containing a powder of solid particles into the volume of the fibrous texture, characterized in that the injection of the loaded suspension is carried out by means of at least one hollow needle in communication with a loaded suspension supply device, each needle being movable in at least one direction extending between a first face and a second opposite face of the fibrous texture so as to inject the loaded suspension at one or more determined depths in the fibrous texture.
    Using one or more needles, it is possible to inject the loaded suspension directly into the heart of the fibrous texture. The duration of injection and its control in 3D or 2.5D textures are significantly improved compared to conventional liquid process since it suffices to locally cross the thickness of the texture and move the needle (s) in the latter.
    In addition, with the method of the invention, there is very little pressure drop (and “filter” effect of the texture) since the charged suspension is injected locally at the level of each needle and in limited quantity. It is thus possible to inject a suspension highly charged with particles and therefore to suppress the step of draining the liquid phase generally necessary with the previous processes in which the liquid phase must be predominant to allow its penetration throughout the texture from one of these faces.
    The method of the invention also has great adaptability to variations in geometry since it is possible to adjust the position and the depth of penetration of each needle into the fibrous texture, regardless of its geometry.
    According to a particular characteristic of the injection process of the invention, each hollow needle preferably has an external diameter of between 0.4 mm and 0.8 mm, which makes it possible to penetrate the fibrous texture without disturbing its architecture, in particularly its weaving, while being compatible with the dimensions of the solid charges present in the suspension to be injected.
    According to another particular characteristic of the injection process of the invention, the hollow needle or needles preferably have a beveled end in order to further facilitate their penetration into the fibrous texture and in particular into the strands, that is to say into the intra-son spaces.
    According to another particular characteristic of the injection method of the invention, the needle or needles are displaced sequentially between a first face and an opposite second face of the fibrous texture, the needle or needles being stopped at intermediate positions between these two faces , a determined dose of loaded suspension being injected into the texture at each intermediate position. This ensures uniform filling of the fibrous texture by locally controlling the position of injection of the suspension loaded into the texture and the quantity of the latter delivered.
    According to yet another particular characteristic of the injection process of the invention, the needle or needles are moved continuously between a first face and an opposite second face of the fibrous texture, the loaded suspension being injected continuously at a determined rate in the fibrous texture. This ensures a gradual and homogeneous filling of the fibrous texture.
    The fibrous texture can be compacted before or after the injection of the loaded suspension in order to achieve a target fiber level. In the first case, during the injection of the loaded suspension, the fibrous texture is placed in a compacting tool comprising at least on one face one or more passage orifices for the needle or needles.
    The subject of the invention is also a method of manufacturing a part made of composite material comprising:
    - formation of a fibrous texture by three-dimensional or multilayer weaving between a plurality of threads,
    injection of a charged suspension into the fibrous texture according to the invention, the charged suspension comprising at least one liquid or solid precursor of a matrix,
    - compacting the injected fibrous texture,
    - Transformation of said at least one precursor into a matrix.
    According to a particular characteristic of the manufacturing process of the invention, the threads of the fibrous texture are formed of refractory ceramic fibers, the loaded suspension containing refractory ceramic particles as a solid precursor of a ceramic matrix, the process comprising the treatment thermal refractory ceramic particles present in the fibrous texture in order to form a refractory ceramic matrix in said texture.
    The yarns of the fibrous texture can be in particular, but not exclusively, formed of fibers made up of one or more of the following materials: alumina, mullite, silica, an aluminosilicate, a borosilicate, silicon carbide and carbon .
    The refractory ceramic particles may be in particular, but not exclusively, of a material chosen from: alumina, mullite, silica, an aluminosilicate, an aluminophosphate, zirconia, a carbide, a boride and a nitride.
    Brief description of the drawings
    Other characteristics and advantages of the invention will emerge from the following description of particular embodiments of the invention, given by way of nonlimiting examples, with reference to the appended drawings, in which:
    FIG. 1 is a schematic sectional view of an injection tool in accordance with an embodiment of the invention,
    FIGS. 2 to 5 show the gradual injection of a suspension loaded into a fibrous texture with the injection tool of FIG. 1 in accordance with an embodiment of the invention,
    - Figure 6 is a schematic sectional view showing an injection of suspension loaded in a fibrous texture maintained in a compacting tool according to another embodiment.
    Detailed description of embodiments
    The injection method of the invention is applicable to the injection of a charged suspension into fibrous textures obtained by three-dimensional (3D) or multilayer (2.5D) weaving, namely textures having a complex geometry in which it is difficult to introduce and distribute homogeneously solid particles in suspension with the processes of the prior art such as for example injection molding called "RTM" or the suction of submicron powder called "APS", because the “filter” effect of the texture, which prevents homogeneous penetration of the loaded suspension throughout the thickness of the texture.
    The fibrous texture is produced in a known manner by weaving by means of a jacquard type loom on which a bundle of warp threads or strands has been placed in a plurality of layers, the warp threads being linked by weft or vice versa. As indicated above, the fibrous texture is made of three-dimensional (3D) or multilayer (2.5D) weavings.
    By “three-dimensional weaving” or “3D weaving” or even “multilayer weaving” or “2.5D weaving”, is meant here a weaving mode by which at least some of the weft threads link warp threads on several layers of warp or vice versa according to a weaving corresponding to a weaving weave which can in particular be chosen from one of the following weaves: interlock, multi-canvas, multi-satin and multi-twill.
    By “interlock weave or fabric” is meant here a 3D weaving weave in which each layer of warp threads links several layers of weft threads with all the threads of the same warp column having the same movement in the plane of the armor. In the case of a 2.5D weaving, we will speak of "warp interlock" which is in the form of a multilayer fabric whose connection between the superimposed layers is ensured by the warp threads. The weaving technique used is that of multi-warp weaving on a warp and weft loom during which the opening of the crowd is unidirectional unlike 3D weaving.
    By “multi-canvas weave or fabric” is meant here a 3D weaving with several layers of weft yarns, the basic weave of each layer of which is equivalent to weave of the conventional canvas type but with certain points of the weave which tie the weft thread layers together.
    By “multi-satin weave or fabric” is meant here a 3D weaving with several layers of weft threads, the basic weave of each layer of which is equivalent to a weave of the conventional satin type but with certain points of the weave which tie the weft thread layers together.
    By “multi-twill weave or fabric” is meant here a 3D weaving with several layers of weft threads, the basic weave of each layer of which is equivalent to a weave of the conventional twill type but with certain points of the weave which tie the weft thread layers together.
    The injection method of the invention applies particularly, but not exclusively, to the production of parts made of oxide / oxide composite material or ceramic matrix composite material (CMC), that is to say comprising a fibrous reinforcement formed at starting from fibers of refractory ceramic material densified by a matrix also of refractory ceramic material.
    The threads used to weave the fibrous texture intended to form the fibrous reinforcement of the part made of composite material can in particular be formed from fibers made of one of the following materials:
    alumina, mullite, silica, an aluminosilicate, a borosilicate, silicon carbide, carbon or a mixture of several of these materials. The solid particles present in the suspension to be injected into the fibrous texture may in particular consist of a material chosen from: alumina, mullite, silica, aluminosilicates, aluminophosphates, carbides, borides, nitrides and mixtures of such materials.
    FIG. 1 illustrates the start of a process for injecting a loaded suspension in accordance with an embodiment of the invention. A fibrous texture 10 obtained by 3D or 2.5D weaving is placed on a support plate 20 so as to present an exposed face 10a opposite an injection tool 100. The injection tool 100 comprises a housing 110 able to move in a double direction Dv as indicated in FIG. 1. The lower edge 110b of the housing 110 comprises a plurality of hollow needles 120 in communication with an injection chamber 130 delimited inside the housing 110 by a piston 140 and the lower edge 110b of the housing. A charged suspension 150 is introduced into the injection chamber 130 through a port 131. Each hollow needle 120 preferably has one end 121 which is bevelled and has a diameter dno of 0.4 mm and 0.8 mm. In the example described here, the position of the hollow needles 120 and, more precisely, the position of the ends 121 of the latter in the fibrous texture, are controlled by the displacement of the housing 110 in double direction Dv.
    As illustrated in FIG. 2, the injection begins with the placement of the ends 121 of the hollow needles 120 as close as possible to the underside 10b of the fibrous texture 10 in contact with the support plate 20, the suspension then being injected into the texture 10 by setting in motion the piston 140 making it possible to inject a first quantity of loaded suspension 150 over a determined thickness in the fibrous texture 10. The injection of the loaded suspension 150 in the fibrous texture 10 continues as illustrated in FIGS. 3 to 5 by moving the ends 121 of the hollow needles 120 from the lower face 10b of the texture to the vicinity of the upper face 10a of the fibrous texture 10 so as to fill the fibrous texture throughout its thickness with the loaded suspension 150.
    The injection of the loaded suspension 150 into the fibrous texture 10 can be carried out in two ways. The loaded suspension 150 can be injected continuously while the needles are gradually moved between the two opposite faces 10b and 10a of the fibrous texture 10, that is to say from the position illustrated in FIG. 2 to the position illustrated in the Figure 5. The loaded suspension 150 can also be injected sequentially. In this case, the needle or needles are displaced sequentially the two opposite faces 10b and 10a of the fibrous texture 10, the needle or needles being stopped at intermediate positions between these two faces, corresponding here to the positions illustrated in FIGS. 2 to 5 , a determined dose of loaded suspension being injected into the texture at each intermediate position.
    The loaded suspension can be injected into the fibrous texture before it is compacted, the latter being carried out subsequently in order to reach in particular a targeted fiber content. The loaded suspension can also be injected into the fibrous texture when the latter is already compacted as illustrated in FIG. 6. In FIG. 6, a 3D or 2.5D woven fibrous texture 30 is maintained in a compacting tool 300 capable of apply on it in a determined compaction rate. The tool 300 has on its face 300a opposite an injection tool 400 a plurality of perforations 310 intended to allow the passage of needles 420 of the injection tool. The injection tool 400 is similar to the injection tool 100 described above, namely that it comprises a housing 410 capable of moving in a double direction Dv as indicated in FIG. 6. The lower edge 410b of the housing 410 comprises a plurality of hollow needles 420 in communication with an injection chamber 430 delimited inside the housing 410 by a piston 440 and the lower edge 410b of the housing. A charged suspension 450 is introduced into the injection chamber 430 through a port 431. Each hollow needle 420 preferably has one end 421 which is bevelled and which has a diameter of 0.4 mm and 0.8 mm.
    The injection of the charged suspension 450 into the fibrous texture 30 is carried out as already described above in relation to FIGS. 2 to 5, that is to say by moving the ends 421 of the hollow needles 420 from the underside 30b from the texture to the vicinity of the upper face 30a of the fibrous texture 30 so as to fill the fibrous texture throughout its thickness with the charged suspension 450. The injection of the charged suspension 450 into the fibrous texture 30 can be performed continuously or sequentially.
    In the examples described above, the injection of the loaded suspension is carried out by means of a plurality of hollow needles extending in a same row aligned with one of the dimensions of the texture, for example its width. In this case, after each injection throughout the entire thickness of the fibrous texture, the needles are displaced lengthwise of the texture according to a determined step in order to cover the entire texture with the local injection of suspension. charge. According to an alternative embodiment, the injection tool can comprise a matrix of hollow needles extending both in the direction of the width and the length of the fibrous texture, the matrix of needles possibly being displaced in the direction of the width and / or the length of the texture when the matrix does not entirely cover the exposed surface of the fibrous texture.
    According to another alternative embodiment, the injection method is implemented with a single needle which is moved in different directions relative to the fibrous texture in order to inject the loaded suspension throughout the volume of the fibrous texture.
    Once the fibrous texture is injected with the loaded suspension, the latter is shaped by being optionally compacted according to a compaction rate making it possible to obtain a determined fiber rate.
    When the liquid phase of the suspension does not correspond to a matrix precursor as is the case in particular with an aqueous solution, it is not necessary to remove it from the preform unlike the processes of the art prior. Indeed, thanks to the injection of the loaded suspension by means of one or more hollow needles at the heart of the texture, it is possible to use suspensions having a high viscosity, that is to say suspensions comprising a small proportion of liquid phase in comparison with the proportion of solid charges. Thanks to the present invention, it is possible to use loaded suspensions whose viscosity can reach 10,000 mPa.s, against only 400 mPa.s at the maximum for injection processes of interior art such as processes injection molding (RTM) or submicron powder aspiration (APS) type. In practice, this means that it is possible to use suspensions containing a mass fraction of charge of up to 85% by mass. The ability of the process of the invention to use suspensions also concentrated very significantly reduces the duration of the suspension injection operation. In this case, the small amount of liquid phase is eliminated naturally during the heat treatment for transforming the solid charges into a matrix. However, if necessary, the preform can be dried before the transformation of the solid charges.
    The preform is then subjected to a heat treatment in order to transform the matrix precursor (s) present in the charged suspension injected.
    In the case of the production of a part made of oxide / oxide or CMC composite material, the heat treatment consists in sintering the solid particles in order to form the matrix in the preform.
    The invention is not limited to the production of a part in oxide / oxide composite material or CMC. The invention can also be applied to the manufacture of a part made of composite material with an organic matrix, the matrix in this case being charged with solid particles. By way of example, the fibrous structure can be produced by 3D or 2.5D weaving between carbon threads and injected according to the process of the invention with a charged suspension comprising an epoxy-type resin and solid fillers made of black carbon, carbides, or oxides. In this case, the heat treatment for transformation of the matrix precursor consists in polymerizing the resin.
    An attempt was made to implement a process in accordance with the invention. This consisted of injecting a fibrous texture obtained by interlock weaving with Nextel 610 ™ alumina threads with a texture of 8 threads / cm. The dimensions of the injected texture are 120 mm in length, 100 mm in width and 5 mm in thickness with a loaded suspension comprising 60% by mass of an alpha alumina powder sold by the company Baikowski under the name SM8 (D50 = 0.3 pm approximately) and 40% by mass of a 50% aqueous solution of monoaluminous phosphate AI (H2PO4) 3.
    The loaded suspension was injected with a single hollow needle with a diameter of 0.8 mm and having a beveled end, the needle being connected to an injection syringe. At each injection position, the needle is moved gradually through the thickness of the fibrous texture (progressive withdrawal of the needle between two opposite faces of the texture) at a speed of 6 cm / min with continuous injection of suspension. The entire texture is injected by multiplying the injection points with the needle, the needle being displaced by a step of 1 cm between each injection position in the two dimensions of the texture (width and length) . The injection of the texture in its entire volume under the conditions described above was carried out in 10 minutes. By way of comparison, the same injection of this texture with internal art injection methods such as injection molding (RTM) or submicron powder aspiration (APS) methods takes several hours.
    Once the injection is complete, the texture is molded under a pressure of 5 bars and at a temperature of 350 ° C. A heat treatment for sintering the alumina particles is then carried out at 850 ° C. under an ambient atmosphere.
    A part is obtained from an oxide / oxide composite material which has a fiber volume rate of 45% and a porosity rate of 24%.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. A method of injecting a charged suspension into a fibrous texture (10) having a three-dimensional or multilayer weaving comprising injecting a suspension (150) containing a powder of solid particles into the volume of the fibrous texture, characterized in that the injection of the loaded suspension (150) is carried out by means of at least one hollow needle (120) in communication with a loaded suspension supply device (100), each needle being movable in at least one direction (Dv) extending between a first face (10b) and an opposite second face (10a) of the fibrous texture (10) so as to inject the loaded suspension at one or more determined depths in the fibrous texture.
    [2" id="c-fr-0002]
    2. Method according to claim 1, wherein each hollow needle (120) has an external diameter (dno) of between 0.4 mm and 0.8 mm.
    [3" id="c-fr-0003]
    3. Method according to claim 1 or 2, wherein each hollow needle (120) has a beveled end (121).
    [4" id="c-fr-0004]
    4. according to any one of claims 1 to 3, in which the needle (s) (120) are moved sequentially between a first face (10b) and a second opposite face (10a) of the fibrous texture (10), the or the needles being stopped at intermediate positions between these two faces, a determined dose of loaded suspension (150) being injected into the texture at each intermediate position.
    [5" id="c-fr-0005]
    5. according to any one of claims 1 to 3, in which the needle (s) (120) are moved continuously between a first face (10b) and a second opposite face (10a) of the fibrous texture (10), the charged suspension (150) being injected continuously at a determined rate in the fibrous texture.
    [6" id="c-fr-0006]
    6. Method according to any one of claims 1 to 5, in which, during the injection of the loaded suspension (450), the fibrous texture (30) is placed in a compacting tool (300) comprising at least one face (300a) one or more passage orifices (310) for the needle (s) (420).
    [7" id="c-fr-0007]
    7. Method of manufacturing a part made of composite material comprising:
    - formation of a fibrous texture (10) by three-dimensional or multilayer weaving between a plurality of threads,
    injection of a charged suspension (150) into the fibrous texture according to any one of claims 1 to 6, the charged suspension comprising at least one liquid or solid precursor of a matrix,
    - compacting the injected fibrous texture,
    - Transformation of said at least one precursor into a matrix.
    [8" id="c-fr-0008]
    8. The method of claim 7, wherein the son of the fibrous texture (10) are formed of refractory ceramic fibers, the charged suspension (150) containing refractory ceramic particles as a solid precursor of a ceramic matrix, the method comprising heat treatment of the refractory ceramic particles present in the fibrous texture in order to form a refractory ceramic matrix in said texture.
    [9" id="c-fr-0009]
    9. The method of claim 7 or 8, wherein the son of the fibrous texture (10) are formed of fibers made of one or more of the following materials: alumina, mullite, silica, an aluminosilicate, a borosilicate , silicon carbide and carbon.
    [10" id="c-fr-0010]
    10. Method according to any one of claims 7 to 9, characterized in that the refractory ceramic particles are made of a material chosen from: alumina, mullite, silica, an aluminosilicate, an aluminophosphate, zirconia, a carbide , a boride and a nitride.
    类似技术:
    公开号 | 公开日 | 专利标题
    EP3237660B1|2018-12-05|Process for the manufacturing of a fibrous preform loaded with ceramic refractory particles
    WO2019058050A1|2019-03-28|Method for injecting a loaded suspension into a fibrous texture and method for producing a part from composite material
    EP3237358B1|2018-09-19|Process for manufacturing a refractory composite body
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    CA2925836C|2021-09-21|Fibrous structure with grouping of floats
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    EP3302943B1|2021-05-05|Method for impregnating a hollow fibrous texture
    CA2990173A1|2016-12-29|Silicon carbide fiber treatment method
    CA3070727A1|2021-07-30|Process for manufacturing composite material parts
    FR3032977A1|2016-08-26|METHOD FOR MANUFACTURING COMPOSITE MATERIAL
    WO2018234669A1|2018-12-27|Process for manufacturing a composite material part having one or more local thickness variations
    FR3032906A1|2016-08-26|PROCESS FOR PRODUCING A FIBROUS PREFORM
    同族专利:
    公开号 | 公开日
    RU2020112395A|2021-10-20|
    BR112020005296A2|2020-09-24|
    CA3076098A1|2019-03-28|
    JP2020534187A|2020-11-26|
    CN111132954A|2020-05-08|
    US20210362368A1|2021-11-25|
    WO2019058050A1|2019-03-28|
    RU2020112395A3|2021-11-16|
    EP3684741A1|2020-07-29|
    FR3071257B1|2021-08-20|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0521747A1|1991-06-17|1993-01-07|Societe Europeenne De Propulsion|Method for homogenous introducing of a solid charge in a porous substrate|
    EP2942111A2|2014-05-08|2015-11-11|Commissariat A L'energie Atomique Et Aux Energies Alternatives|Device for producing a deposit of particles on a substrate and depositing method using such a device|
    FR3030502A1|2014-12-23|2016-06-24|Snecma|PROCESS FOR MANUFACTURING A PIECE OF COMPOSITE MATERIAL|
    WO2016193569A1|2015-06-04|2016-12-08|Safran Aircraft Engines|Method for impregnating a hollow fibrous texture|
    FR3041890A1|2015-10-05|2017-04-07|Snecma|PROCESS FOR MANUFACTURING A COMPOSITE MATERIAL PART BY INJECTING A BARBOTIN CHARGED IN A POROUS MOLD|FR3096299A1|2019-05-23|2020-11-27|Safran|Manufacturing process of a composite material part by injection of a slip loaded with a fibrous texture|EP2860009B1|2013-10-11|2019-01-09|Ems-Patent Ag|Method for their manufacture of reinforced moulded items|
    FR3017866B1|2014-02-24|2016-04-08|Herakles|COMPOSITE OXIDE / REINFORCED OXIDE COMPOSITE MATERIAL AND MANUFACTURING METHOD THEREOF|
    FR3030505B1|2014-12-23|2019-07-12|Safran|PROCESS FOR PRODUCING A FIBROUS PREFORM CHARGED WITH REFRACTORY CERAMIC PARTICLES|
    CN106866151B|2017-03-09|2020-04-14|哈尔滨工业大学|Method for preparing carbon fiber toughened zirconium boride-silicon carbide composite material by slurry injection process|CN111420463B|2020-04-01|2021-05-25|中国科学院过程工程研究所|Nano carbon material composite filter material and preparation method and application thereof|
    CN111420464B|2020-04-01|2021-07-27|中国科学院过程工程研究所|Preparation device and method of nano carbon material composite filter material|
    法律状态:
    2019-03-22| PLSC| Publication of the preliminary search report|Effective date: 20190322 |
    2019-08-20| PLFP| Fee payment|Year of fee payment: 3 |
    2020-08-19| PLFP| Fee payment|Year of fee payment: 4 |
    2021-08-19| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1758658|2017-09-19|
    FR1758658A|FR3071257B1|2017-09-19|2017-09-19|PROCESS FOR INJECTING A SUSPENSION LOADED IN A FIBROUS TEXTURE AND PROCESS FOR MANUFACTURING A PART FROM COMPOSITE MATERIAL|FR1758658A| FR3071257B1|2017-09-19|2017-09-19|PROCESS FOR INJECTING A SUSPENSION LOADED IN A FIBROUS TEXTURE AND PROCESS FOR MANUFACTURING A PART FROM COMPOSITE MATERIAL|
    BR112020005296-5A| BR112020005296A2|2017-09-19|2018-09-18|methods for injecting a charged suspension and for making a part made of composite material.|
    EP18782123.6A| EP3684741A1|2017-09-19|2018-09-18|Method for injecting a loaded suspension into a fibrous texture and method for producing a part from composite material|
    CA3076098A| CA3076098A1|2017-09-19|2018-09-18|Method for injecting a loaded suspension into a fibrous texture and method for producing a part from composite material|
    US16/648,427| US20210362368A1|2017-09-19|2018-09-18|Method for injecting a loaded suspension into a fibrous texture and method for manufacturing a part made of composite material|
    CN201880060806.6A| CN111132954A|2017-09-19|2018-09-18|Method for injecting a loaded suspension into a fibrous structure and method for producing a component made of a composite material|
    PCT/FR2018/052283| WO2019058050A1|2017-09-19|2018-09-18|Method for injecting a loaded suspension into a fibrous texture and method for producing a part from composite material|
    RU2020112395A| RU2020112395A3|2017-09-19|2018-09-18|
    JP2020516435A| JP2020534187A|2017-09-19|2018-09-18|A method of injecting a loaded suspension into a fibrous tissue and a method of manufacturing composite parts|
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