• 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:
    The invention relates to an electromagnetic shielding fabric having a weave of weft yarns (2) and intertwined warp yarns (3). In addition, the warp yarns (3) are conductive and comprise multi-filament or monofilament textile conductive yarns associated with metal strands and in that at least one conductive warp yarn (4) is inserted into a weft to create a connection equipotential perpendicular to the direction of the warp yarns (3).
    公开号:FR3022266A1
    申请号:FR1455480
    申请日:2014-06-16
    公开日:2015-12-18
    发明作者:Gilles Clement；Pierre Omerin
    申请人:TRESSE IND；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a fabric for electromagnetic shielding. It can be observed in particular in the general field of transport that many functions are performed by electric motors.
    [0002] The consequence is that we find in many devices such as - but not limited to: aircraft, motor vehicles including electrical and / or hybrid etc. cables that connect batteries to electrical actuators. The presence of cable bundles -conductors has an impact on two levels. On the one hand, these cables being crossed by an electric current, they emit an electromagnetic field which is disruptive for their environment. It is also appropriate that these cables are not disturbed by any electromagnetic fields. In other words, it is necessary to prevent a signal from escaping from the cable and also to prevent a spurious signal from being added to the signal carried by the cable. On the other hand, the conducting cables are integrated into an aircraft, motor vehicle or other apparatus and, therefore, may be brought into contact with mechanical members of the apparatus in question. During operation, vibrations may occur which cause cycles of friction between the cables and the surrounding members to be observed; these vibrations can damage the cables. The electric cables are protected by sheaths that provide electromagnetic shielding and mechanical protection. With regard to the electromagnetic shielding sheath, it is possible, for example, by the document EP 1 348 247, to use an electromagnetic shielding braid which provides both an electromagnetic shielding - of the order of 50/60 dB at 30/40. MHz - and quality mechanical protection. However the principle of the braid which is closed on it itself may prohibit certain applications. Indeed, the implementation of a shielding braid is made by introducing one end of the cable into the sheath and then sliding on the cable. Thus, the introduction of a sheath on a cable that is in place can not be done without disassembly of the latter. There are also so-called self-resealing armor sheaths. Unlike braided sheaths, these sheaths consist of woven ribbons. The warp yarns comprise conductive metal strands to provide the shielding function, while the weft yarns comprise thermoformable mono filamentary strands to provide the self-holding function of the tubular-shaped sheath.
    [0003] Due to their open construction, self-resealing woven armor sheaths have poor performance. Their effectiveness generally found is of the order of 30 dB at 30/40 MHz or an electromagnetic efficiency degraded by about 20 to 30 dB compared to a braided sheath, such as that described above.
    [0004] The reason why conventional self-sealing woven sheaths have low shielding power is mainly due to the lack of equipotential bonding. To overcome this lack, we use artifices to create equipotential bonds. Thus, it is known to place metal collars, for example, at the ends of the sheath. It is also known to make ligatures at regular intervals by metal collars. This presented a cost in equipment and installation time. On the other hand, these self-resealing woven sheaths can be relatively heavy, which is a handicap for this type of sheath 20 especially for aeronautical applications. In this technical context, an object of the invention is to provide a light self-resealing fabric having an electromagnetic shielding efficiency close to the values of a braided tubular metal sheath, 50-60dB at 30 / 40MHz. Thus, the invention relates to an electromagnetic shielding fabric having a weave of weft yarns and intertwined warp yarns, characterized in that the conductive warp yarns comprise monofilament or multifilament yarns associated with metal strands and in that at least one conductive warp yarn is inserted in weft to create an equipotential bond perpendicular to the direction of the warp yarns. Preferably, the fabric comprises a plurality of conductive chain son inserted in a chain in a pitch of between I and 8 in the crowds. According to other characteristics of the fabric according to the invention: the ratio of the diameters of the monofilaments and metal strands in the warp yarns is at least 2.5. the diameter of the monofilaments is of the order of 0.125 mm to 0.40 mm and the diameter of the metal strands is of the order of 0.05 mm to 0.16 mm. the weft yarns consist of one or more materials from the group comprising: PET; PET-FR; PBT; PMMA; PA4.6; PA6.6; PA11; PA12; PPS; PEEK; ECTFE; PVDF; ETFE FEP; PFA; PTFE. the warp yarns associated with the metal strands consist of one or more materials from the group comprising: PET; PBT; PMMA; polyethylene; polyamides; acrylic; carbons; PAN; polypropylene; PPS; Polyimides; PEEK; ECTFE; PVDF; Fluorofibres; glass fibers; ceramic and mineral fibers, aramid and meta-aramid fibers; Copper bare or coated with tin, nickel, silver; bare or tinned brass; Aluminum, aluminum alloys, bare steel, zinc-plated steel, tin-plated copper steel, nickel-plated copper-plated steel, silver-plated copper steel, stainless steel, inconel®, Monet®, nickel and nickel alloys, 15 Cupro-Nickel alloys; the fabric receives a coating layer of one or more elements of the group comprising copper, zinc, nickel or silver. For a good understanding, the invention is described with reference to the accompanying drawing showing by way of non-limiting example several embodiments of a fabric according to the invention. Figure 1 is a schematic view of the weave of a fabric according to one embodiment of the invention; Figure 2 shows a schematic view of the fabric during weaving; Figures 3 to 6 show four shielding measurements on a triaxial bench according to the provisions of IEC 62153-4-3 for, respectively, a sheath of the prior art and three sheaths using three embodiments of fabric according to the invention. . As can be seen in FIG. 2, the electromagnetic shielding fabric 1 has a weave of weft yarns 2 and intertwined warp yarns 3. The warp yarns 3 comprise conductive strands associated with textile fibers. Concretely, the 3-conductor warp yarns may comprise monofilament yarns associated with metal strands. The metal strands can be incorporated in monofilament son by wrapping, stranding or braiding. In practice, the ratio of the diameters of monofilaments and metal strands in the warp yarns may be at least 2.5 mm. Thus, it is possible to envisage an embodiment of the invention in which the diameter of the monofilaments is of the order of 0.25 mm and the diameter of the metal strands is of the order of 0.10 mm. The weft yarns 2 may be conductive yarns but, preferably, are nonconductive yarns essentially composed of thermoplastic monofilaments, for example PET; PET-FR; PBT; PMMA; PA4.6; PA6.6; PA11; PA12; PPS; PEEK; ECTFE; PVDF; ETFE FEP; 10 PFA; PTFE so that the fabric incorporating these weft son 2 has a linear density contained. Figure 2 shows how the first fabric manufacturing step of the invention is performed. As shown in this figure, it is provided at a predetermined pitch P which can be, for example, 8 picks, according to the example of Figure 1, to insert a warp yarn 4 - which is therefore conductive - in the frame. In FIG. 1, numerals denote: 1 textile yarn 2 textile yarn 20 3 metal yarn 4 textile yarn metal yarn inserted in weft 6 textile yarn 7 textile yarn 25 8 metal yarn. It is also possible to insert other conductive threads of the chain in the frame by arranging them on different frames and to select them on sequences of a minimum pick but in phase shift relative to each other. For this, the loom has a lower weft insertion needle 6 and an upper weft insertion needle 7; these needles will thus allow to insert into the frame composed of non-conductive son, a chain son who is conductive. According to another possibility, it is possible to use a needle which has a profile enabling it to take, according to the thread which is presented to it, the weft thread and the warp thread which is conductive.
    [0005] Thus, the fabric according to the invention is provided with a conductive thread in its weft direction which thus forms an equipotential bond. The resulting fabric has an interweaving of conductive son, which is very favorable for the electromagnetic efficiency.
    [0006] After weaving, the fabric undergoes a treatment phase essentially by heating known per se to give it its shape memory property, that is to say its ability to wind on itself. To demonstrate the effectiveness of the invention, four triaxial bench measurements were carried out according to the terms of IEC 62153-4-3 for a cladding of the prior art and three sheaths according to the invention. FIG. 3 shows an electromagnetic shielding measurement for a cladding composed, according to the prior art, of a fabric having (i) 0.10 mm 8-stranded tinned copper wires and 0.25 mm PET monofilaments and (FIG. ii) in weft PET thermoplastic monofilaments with a diameter of 0.254 mm. There is an efficiency of the order of 34 dB at 30 MHz and 30 dB at 40 MHz. FIG. 4 shows an electromagnetic shielding measurement made with the fabric represented in FIG. 1. This fabric comprises (i) PET textile yarns and 0.10 mm 8-strand tinned copper wires and (ii) as weft. PET thermoplastic monofilaments and chain metal wires in a pitch of eight picks. The measurements carried out within the framework of the aforementioned standard show an attenuation of the order of 42 dB at 30 MHz and 40 dB at a frequency of 40 MHz. FIG. 5 shows an electromagnetic shielding measurement made with a variant of the fabric shown in FIG. 1. This fabric comprises (i) PET textile strings and 0.10 mm 8-stranded tinned copper wires and (ii) in weft PET thermoplastic monofilaments and warp threads inserted sin each each. Measurements carried out within the framework of the abovementioned standard show an attenuation of the order of 48 dB at 30 MHz and 45 dB at a frequency of 40 MHz. Optionally, to enhance the effectiveness of the shielding, it is envisaged to deposit a metal coating on the fabric. This coating can be performed by electrochemical deposition according to known techniques. A thickness in the range of 0.2 μm to 1.3 μm is deposited according to the desired level of shielding attenuation.
    [0007] Figure 6 shows an electromagnetic shielding measurement made with a variant of the fabric shown in Figure 1, the latter having received a nickel coating. This fabric comprises (i) PET textile yarns and 0.10 mm 8-strand tinned copper strands, (ii) weft PET thermoplastic monofilaments, and chain strings inserted in a pitch of eight picks and (FIG. iii) a metallized coating electrochemically deposited on a thickness of the order of 0.7 pm, knowing that the coating may have a thickness of 0.2 pm to 1.3 pm. Measurements made in the context of the aforementioned standard show attenuation in the range of 56 dB at 30 MHz and 55.5 dB at a frequency of 40 MHz. These measurements demonstrate that the sheaths made with the fabric according to the invention in several variants have an electromagnetic shielding significantly greater than the sheaths of the prior art.
    [0008] Of course, the invention is not limited to the embodiments described for a fabric (Taffeta), for example, but it encompasses all embodiments such as Twill, Satin, Reps, Reps across (fluted), Long Reps, Braided Armor (Panama) etc ...
    权利要求:
    Claims (9)
    [0001]
    REVENDICATIONS1. Electromagnetic shielding fabric having a weave of weft yarns (2) and intertwined warp yarns (3), characterized in that the warp yarns (3) are conductive and comprise multi-filament or associated monofilament textile conductive yarns to metal strands and in that at least one conductor wire (4) is inserted in a weft pattern to create an equipotential bond perpendicular to the direction of the warp yarns (3). 10
    [0002]
    2. Electromagnetic shielding fabric according to claim 1, characterized in that the fabric comprises a plurality of chain son conductors (4) inserted chain in a pitch P between 1 and 8 in the crowds. 15
    [0003]
    3. Electromagnetic shielding fabric according to one of claims 1 to 2, characterized in that the ratio of the diameters of the monofilaments and metal strands in the conductive chain son (3) is at least 2.5. 20
    [0004]
    4. Electromagnetic shielding fabric according to claim 3, characterized in that the diameter of the monofilaments is of the order of 0.125 mm to 0.40 mm and the diameter of the metal strands is of the order of 0.05 mm to 0.16 mm. 25
    [0005]
    Electromagnetic shielding fabric according to one of Claims 1 to 4, characterized in that the thermoplastic monofilaments included in the weft yarns (2) consist of one or more materials from the group consisting of: PET; PET-FR; PBT; PMMA; PA4.6; PA6.6; PAll; PA12; PPS; PEEK; ECTFE; PVDF; ETFE FEP; PFA; PTFE.
    [0006]
    6. electromagnetic shielding fabric according to one of claims 1 to 5, characterized in that the fabric receives a metal layer of thickness between 0.2 pm to 1.3 pm. 35
    [0007]
    Electromagnetic shielding fabric according to claim 6, characterized in that the metal layer comprises one or more metals from the group consisting of nickel and zinc and copper and silver.
    [0008]
    8. electromagnetic shielding fabric according to one of claims 1 to 7, characterized in that the son of chains consist of strands of one or more materials of the group comprising: PET; PBT; PMMA; polyethylene; polyamides; acrylic; carbons; PAN; polypropylene; PPS; polyimides; PEEK; ECTFE; PVDF; Fluorofibres; glass fibers; ceramic and mineral fibers, aramid and meta-aramid fibers; Copper bare or coated with tin, nickel, silver; bare or tinned brass; Aluminum, aluminum alloys, bare steel, zinc-plated steel, tin-plated copper steel, nickel-plated copper-plated steel, silver-plated copper steel, stainless steel, Inconel °, Mone10, nickel, nickel alloys, Cupro-Nickel alloys
    [0009]
    An electromagnetic shielding sheath comprising a fabric strip according to one of claims 1 to 8.
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    EP1348247A1|2003-10-01|Electromagnetic armour sleeve with extensible diameter
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    同族专利:
    公开号 | 公开日
    WO2015193602A1|2015-12-23|
    CA2951360A1|2015-12-23|
    MX2016016715A|2017-06-28|
    MX357189B|2018-06-29|
    US20170321353A1|2017-11-09|
    EP3155152B1|2018-07-18|
    EP3155152A1|2017-04-19|
    PT3155152T|2018-11-09|
    FR3022266B1|2016-05-27|
    US10392728B2|2019-08-27|
    TR201815274T4|2018-11-21|
    ES2691397T3|2018-11-27|
    KR20170021783A|2017-02-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1731643A1|2004-03-08|2006-12-13|Kanebo, Ltd.|Woven or knitted fabric, diaphragm for speaker, and speaker|
    WO2006029543A1|2004-09-14|2006-03-23|Textilma Ag|Textile strip comprising an integrated antenna thread for an rf transponder|
    FR2920442A1|2007-10-10|2009-03-06|Commissariat Energie Atomique|Textile for recovering sensor information distributed on person in e.g. sports field, has electrically conducting wires constituted by mixed assembly of textile fibers and copper wire, where copper wire is enameled|
    EP2233620A2|2009-03-23|2010-09-29|Politechnika Lodzka|Shielding fabric against electromagnetic radiation|
    EP2524983A2|2010-01-14|2012-11-21|Silveray Co., Ltd.|Conductive fabric and method and apparatus for manufacturing same|
    US20130118633A1|2010-06-09|2013-05-16|Walter Studer|Loom for producing woven goods or material with an incorporated cover thread|
    GB8423219D0|1984-09-14|1984-10-17|Raychem Ltd|Shaped woven fabrics|
    DE69723560T2|1996-08-05|2004-06-09|Seiren Co. Ltd.|CONDUCTIVE SEALING MATERIAL AND ITS MANUFACTURING PROCESS|
    US6381482B1|1998-05-13|2002-04-30|Georgia Tech Research Corp.|Fabric or garment with integrated flexible information infrastructure|
    FR2819092B1|2001-01-03|2003-02-28|Tresse Ind|ELECTROMAGNETIC SHIELDING SHEATH, WITH EXTENSIBLE DIAMETER|
    CA2631628A1|2005-12-23|2007-06-28|Textilma Ag|Ribbon needle loom for manufacturing a strip, in particular a label strip, having a woven-in conductive thread, in particular antenna thread|WO2016105885A1|2014-12-22|2016-06-30|Arimtax Technologies Llc|Conductive signal paths in woven fabrics|
    CN105824472A|2016-03-18|2016-08-03|苏州椒图电子有限公司|Matrix circuit and sensing system|
    CN108796774B|2018-06-20|2020-11-06|保定三源纺织科技有限公司|Camouflage shielding cloth and production method thereof|
    RU2750215C1|2019-12-25|2021-06-24|Государственное образовательное учреждение высшего профессионального образования Кыргызско-Российский Славянский университет |Broadband electromagnetic absorbent coating|
    CN111188116A|2020-02-17|2020-05-22|上海市纺织科学研究院有限公司|Preparation method of polyether-ether-ketone fiber-based self-lubricating fabric|
    法律状态:
    2015-03-17| PLFP| Fee payment|Year of fee payment: 2 |
    2015-12-18| PLSC| Search report ready|Effective date: 20151218 |
    2016-04-28| PLFP| Fee payment|Year of fee payment: 3 |
    2017-05-11| PLFP| Fee payment|Year of fee payment: 4 |
    2018-04-27| PLFP| Fee payment|Year of fee payment: 5 |
    2019-05-09| PLFP| Fee payment|Year of fee payment: 6 |
    2021-03-12| ST| Notification of lapse|Effective date: 20210205 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1455480A|FR3022266B1|2014-06-16|2014-06-16|FABRIC FOR ELECTROMAGNETIC SHIELDING.|FR1455480A| FR3022266B1|2014-06-16|2014-06-16|FABRIC FOR ELECTROMAGNETIC SHIELDING.|
    EP15733840.1A| EP3155152B1|2014-06-16|2015-06-15|Fabric for electromagnetic shielding|
    ES15733840.1T| ES2691397T3|2014-06-16|2015-06-15|Fabric for electromagnetic shielding|
    TR2018/15274T| TR201815274T4|2014-06-16|2015-06-15|Fabric for electromagnetic shielding.|
    CA2951360A| CA2951360A1|2014-06-16|2015-06-15|Fabric for electromagnetic shielding|
    US15/319,509| US10392728B2|2014-06-16|2015-06-15|Fabric for electromagnetic shielding|
    MX2016016715A| MX357189B|2014-06-16|2015-06-15|Fabric for electromagnetic shielding.|
    PCT/FR2015/051584| WO2015193602A1|2014-06-16|2015-06-15|Fabric for electromagnetic shielding|
    PT15733840T| PT3155152T|2014-06-16|2015-06-15|Fabric for electromagnetic shielding|
    KR1020167034909A| KR20170021783A|2014-06-16|2015-06-15|Fabric for electromagnetic shielding|
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