Electromagnetic shielding fabric

Abstract

The present invention discloses an electromagnetic shielding fabric (1, 2, 3). The electromagnetic shielding fabric (1, 2, 3) includes a non-conductive fabric layer (101) and a conductive fabric layer (111). The non-conductive fabric layer (101) includes a plurality of non-conductive warp threads (22, 32) and a plurality of non-conductive weft threads (24a, 24b, 34a to 34f), where the plurality of non-conductive warp threads (22, 32) and the plurality of non-conductive weft threads (24a, 24b, 34a to 34f) are made of a non-conductive material. The conductive fabric layer (111) includes a plurality of conductive warp threads (21, 31) and a plurality of conductive weft threads (23, 33), where the plurality of conductive warp threads (21, 31) and the plurality of conductive weft threads (23, 33) are at least partially made of a conductive material. The non-conductive textile layer (101) defines a pattern surface (10) of the electromagnetic shielding textile (1, 2, 3), the conductive textile layer (111) defines a grid-like structure (11), and the non-conductive textile layer (101) and the conductive textile layer (111) are woven together. The electromagnetic shielding textile (1, 2, 3) includes a plurality of sectors (25a, 25b, 35a, 35b), each of which further includes a binding point (B1, B2, B3).

Description

[Technical Field]

[0001] The present invention relates to fabrics, and more particularly to electromagnetic shielding fabrics. [Background technology]

[0002] Electronic devices capable of exchanging data via wireless communication are widespread. In particular, in the case of wireless wide area networks (WWANs) and wireless local area networks (WLANs), such as GSM, UMTS, LTE / LTE-A, 5G, WiFi, and WIMAX communication networks, data is constantly transmitted via radio transmissions in various frequency bands and with various energies. In addition, short-range communication standards such as Bluetooth and ZigBee are also widely used to wirelessly connect various devices.

[0003] Every corner of the human environment, especially in urban environments, is constantly permeated by electromagnetic waves containing large amounts of energy spread across a large frequency spectrum.

[0004] This congestion of radio frequencies causes interference problems and reduces communication efficiency, and the long-term effects of continued exposure to electromagnetic waves on the human body are not yet fully understood.

[0005] Wireless connections also provide opportunities for unauthorized access to data or for intrusion / hijacking of entire wireless devices or computer networks remotely, i.e., within the range where the wireless signal is normally transmitted and received by the target device (e.g., within tens of meters for WiFi signals, hundreds of meters for GSM signals).

[0006] From the above, it is clear that there is a need for measures that can at least partially protect people and spaces (e.g. windows, rooms in buildings, vehicle interiors, etc.) from electromagnetic radiation in a simple and effective way.

[0007] For this reason, textiles or fabrics comprising metal threads arranged to provide electromagnetic radiation shielding based on the so-called Faraday cage effect have been proposed in the art.

[0008] For example, Chinese Patent No. 105483906 discloses a composite fabric formed by combining various materials. Bamboo fiber and cotton / stainless steel fiber are used in the warp direction. The bamboo fiber and cotton / stainless steel fiber are arranged in a 5:1 ratio. In the weft direction, the surface layer contains cotton / stainless steel fiber, and the lining layer uses modal fiber. The surface layer and lining layer are arranged in a 1:1 ratio. The surface layer uses a two-up one-down twill in the warp direction as the surface, and a fluffy, soft towel structure is used as the base for the lining layer. The cotton / stainless steel fiber in the surface layer is woven in the warp and weft directions to form a net, providing electromagnetic wave shielding and antistatic properties.

[0009] Chinese Patent Application Publication No. 201704490 discloses a double antibacterial and antiradiation fabric, which includes a plurality of warp yarns and weft yarns, and the warp yarns include twisted yarns of bamboo fiber and metal fiber arranged alternately. Each weft yarn is composed of a twisted metal fiber yarn and a twisted bamboo fiber yarn arranged on the upper surface of the twisted metal fiber yarn, and the weft yarn is guided in sequence so that it sinks below the first warp yarn of a group of four warp yarns arranged in a row and floats above the other three warp yarns.

[0010] German Patent Application Publication No. 60216062 discloses a reinforced fabric. The reinforced fabric includes a combination of warp and weft threads on its front side, or a mesh-like assembly on its back side, which includes a reinforcing lattice of warp and weft threads. The warp and weft threads of the reinforced fabric are made of a material with higher mechanical properties than the warp and weft threads on the front side. The reinforcing lattice is connected to the front side by its warp and weft threads, and the warp and weft threads are attached at different positions on the front side and cross each other outside the base fabric that forms the front side.

[0011] The applicant has found that the conductive yarns in these fabrics have a non-uniform grid-like structure, in particular the intersections of the weft and warp yarns are irregularly spaced and / or the weft and warp yarns are only loosely overlapped, which does not ensure reliable contact, and the contact between the conductive warp and weft yarns is affected by the shape of the surface covered by the fabric and by creases that may occur during use.

[0012] These defects cause the regularity of the lattice structure of the conductive threads in the fabric to be disrupted, and therefore the fabric is unable to provide a consistent and uniform shielding effect.

[0013] Applicant has also found that electromagnetic shielding fabrics known in the art are unable to weave complex patterns while maintaining a regular grid structure. In other words, the fabrics known in the art are "functional" fabrics that are not suitable for producing products that also meet the demands of the fashion and interior design industries. Summary of the Invention

[0014] SUMMARY OF THE INVENTION An object of the present invention is to overcome the drawbacks of the prior art.

[0015] In particular, the present invention seeks to provide a fabric in which functionality and design are not at odds with each other. In other words, the present invention aims to provide effective electromagnetic radiation shielding while minimizing visual and physical limitations to allow for the weaving of a wide variety of designs.

[0016] It is a further object of the present invention to provide a woven fabric that includes an effective electromagnetic shielding grid, yet includes an aesthetic patterned surface in which the conductive yarns forming the electromagnetic shielding grid are imperceptible or substantially imperceptible to a user.

[0017] These and further objects of the present invention will become apparent from the following description and appended claims.

[0018] According to a first aspect, the present invention relates to a textile, said textile comprising: a non-conductive woven layer including a plurality of non-conductive warp yarns and a plurality of non-conductive weft yarns, the plurality of non-conductive warp yarns and the plurality of non-conductive weft yarns being made of a non-conductive material; a conductive woven layer including a plurality of conductive warp yarns and a plurality of conductive weft yarns, the plurality of conductive warp yarns and the plurality of conductive weft yarns being at least partially made of a conductive material; Includes:

[0019] Specifically, the non-conductive fabric layer defines a patterned surface of the electromagnetic shielding fabric, the conductive fabric layer defines a grid-like structure, the non-conductive fabric layer and the conductive fabric layer are interwoven, and the electromagnetic shielding fabric includes a plurality of sectors arranged adjacent to each other in the warp and / or weft directions, each of which includes at least one non-conductive warp yarn group and one conductive warp yarn, and at least one non-conductive weft yarn and one conductive weft yarn, the conductive warp yarn group including at least two non-conductive yarns, and the non-conductive weft yarn group including at least two non-conductive yarns.

[0020] Advantageously, each of the sectors a first binding point where the conductive warp yarns are sunk below the conductive weft yarns; for each non-conductive warp yarn in the group of non-conductive warp yarns, a second binding point where the non-conductive warp yarn floats above the conductive weft yarn; Further includes:

[0021] In addition, sectors arranged alternately along the longitudinal and / or latitudinal directions may be a third bundling point (B3) at which the conductive warp yarn floats above at least one non-conductive weft yarn in the group of non-conductive weft yarns, the third bundling point being adjacent to the first bundling point (B1) at which the conductive warp yarn sinks below the conductive weft yarn; Includes:

[0022] In the scope of this disclosure and the claims, the term "conductive" refers to the property of a material that allows the flow of electric current to pass through, while the term "non-conductive" refers to the property of a material that prevents the flow of electric current. In particular, a "conductive yarn" is characterized by its electrical resistance being significantly lower than that of a "non-conductive yarn." For example, a non-conductive yarn has an electrical resistance that is three or more orders of magnitude lower than that of a conductive yarn.

[0023] Applicant has realized that a fabric according to the present invention, regulated as described above, provides excellent electromagnetic shielding across a very large frequency spectrum, where "excellent electromagnetic shielding" refers to reducing the energy associated with electromagnetic radiation measured downstream from the fabric to 1% or less of the energy measured upstream from the fabric.

[0024] In other words, a body covered with the fabric of the present invention is protected from electromagnetic radiation having levels of energy proven to be harmful to humans and / or having levels of energy sufficient to carry out wireless communications.

[0025] In particular, textiles according to the invention, regulated as described above, effectively shield against electromagnetic radiation at frequencies constituting the frequency bands used substantially by all wireless communication systems, such as cellular networks (e.g. GSM, UMTS, LTE / LTE-A, 5G), WLANs (e.g. WiFi, WIMAX), short-range communication systems and personal area networks (e.g. Bluetooth, Zigbee), etc. More generally, textiles according to the invention, regulated as described above, effectively shield against electromagnetic radiation in the very high frequency (VHF), ultra high frequency (UHF), microwave (super high frequency (SHF)) range and at least partially in the millimeter wave (extremely high frequency (EHF)) range.

[0026] According to the International Telecommunications Union (ITU) regulations, VHF corresponds to radio frequencies from 30 MHz to 300 MHz, UHF corresponds to radio frequencies from 300 MHz to 3 GHz, SHF corresponds to radio frequencies from 3 GHz to 30 GHz, and EHF corresponds to radio frequencies from 30 GHz to 300 GHz.

[0027] At the same time, the non-conductive fabric layer can be woven to obtain a complex aesthetic pattern: in fact, the conductive warp and weft threads in the non-conductive fabric layer are imperceptible, and the conductive fabric layer is formed into a uniform and regular grid-like structure.

[0028] In particular, the combined invention developed by the applicant provides a fabric having two interwoven layers. At the same time, the conductive warp yarns and conductive weft yarns are constantly and regularly in contact with each other, both mechanically and electrically, along the warp and weft directions of the fabric. This allows the lattice structure to remain substantially unchanged even when the fabric is folded or stretched during use. This allows for reliable electromagnetic shielding in a wide range of applications and conditions.

[0029] Furthermore, the specific structure of the fabric according to the present invention has a group of non-conductive warp yarns including at least two non-conductive yarns and a group of non-conductive weft yarns including at least one non-conductive yarn in each sector of the fabric, which allows for the realization of various aesthetic patterns, for example, patterns using Jacquard weaving techniques.

[0030] In one embodiment, the group of non-conductive warp yarns is made up of three non-conductive yarns. Temperament Preferably, the sectors arranged alternately along the warp and / or weft direction include a single third binding point at which the conductive warp yarn floats above at least one non-conductive weft yarn.

[0031] Applicant has discovered that the specific binding between the conductive and non-conductive warp and weft yarns allows for virtually any desired pattern to be obtained in the non-conductive fabric layer, while the very fine and reliable grid-like structure in the conductive fabric layer provides excellent electromagnetic shielding across the frequency spectrum discussed above.

[0032] In one embodiment, the group of non-conductive weft yarns comprises at least four non-conductive weft yarns. Preferably, each sector comprises a further third bundling point at which a conductive warp yarn floats above at least one non-conductive weft yarn. Advantageously, each further third bundling point is spaced apart from the previous third bundling point in the warp direction by at least three non-conductive weft yarns.

[0033] With such a bundling arrangement, even for a woven fabric containing a large amount of non-conductive warp yarns and / or non-conductive weft yarns, the structure of the conductive fabric layer can be firmly maintained as a non-conductive fabric layer and a regular lattice structure while the woven fabric is in use.

[0034] In one embodiment, each of the first bundling points is spaced apart from a first bundling point of another sector in the warp and / or weft directions, preferably in the warp and weft directions, by a distance ranging from 1.5 mm to 3.5 mm, preferably 2 mm.

[0035] Preferably, each of the sectors comprises conductive and non-conductive warp yarns in a ratio selected from the following: 1:3, 1:5, 1:7 and 1:9.

[0036] Applicant has discovered that a particular ratio between warp and weft threads provides the best results in both pattern design and electromagnetic shielding.

[0037] In one embodiment, the conductive warp and conductive weft yarns are made from yarns spun with metal fibers, preferably stainless steel fibers, and yarns spun with natural fibers, with the proportion of metal fibers (e.g., stainless steel fibers) ranging from 5% to 50%, preferably 20%.

[0038] In a preferred embodiment, the conductive warp and weft yarns are made from yarns spun together with stainless steel fibers and wool fibers.

[0039] Conductive warp and weft yarns of this composition allow for both effective Faraday cages and yarn dyeing. Therefore, a wide variety of aesthetic patterns can be woven. Furthermore, the above-described composition has been found to be optimal for hiding the presence of metallic fibers in the fabric of the present invention. In other words, the above-described composition minimizes the color change (graying) and / or metallic glitter typically associated with the presence of metallic fibers in textiles.

[0040] The applicant has also found that conductive threads made from stainless steel are superior to other conductive materials such as silver and copper. In particular, stainless steel is dermatologically safe and corrosion-resistant. Therefore, the threads can interact with human skin without causing negative reactions and can withstand abrasion and chemical treatments. The resulting threads are safe for human use and maintain a stable appearance over a long service life.

[0041] In one embodiment of the present invention, the conductive warp yarns and conductive weft yarns have a yarn count or linear density ranging from 12.5 tex (g / km) to 125 tex (g / km).

[0042] In particular, the yarn count (also called "weight numbering") indicates the weight per length of yarn or thread. More specifically, the unit of yarn count is "tex", which is a unit of the International Metrology System equivalent to 1 gram per 1000 meters, i.e. 1 tex = 1 g / 1 km.

[0043] Preferably, each of the conductive warp and conductive weft yarns is made from yarns having a fineness ranging from 8 m / g, designated in the industry as 8 Nm, to 50 m / g, designated in the industry as 50 Nm.

[0044] In particular, "fineness" is a characteristic of yarn and is defined as the length of yarn per unit weight. The unit of fineness is "Numbering" (Nm), which is an international standard unit of measurement equivalent to 1 meter per gram, i.e., 1 Nm is 1 m / 1 g.

[0045] More preferably, each of the conductive warp and conductive weft yarns comprises two yarns having a fineness of 50 m / g (industry designated 50 / 2 Nm).

[0046] The applicant has found that this structure can ensure the reliability of the mechanical and electrical properties of the conductive yarn, and can facilitate weaving by combining it with non-conductive yarn.

[0047] In one embodiment, each of the non-conductive warp yarns includes two yarns, each made of wool and having a fineness of 60 m / g (industry designated as 60 / 2 Nm), and each of the non-conductive weft yarns includes two yarns, each made of wool and having a fineness of 28 m / g (industry designated as 28 / 2 Nm).

[0048] These yarn characteristics allow for high quality fabrics to be obtained that are suitable for manufacturing products that meet the demands of the fashion and interior design industries.

[0049] A different embodiment of the present invention relates to a multi-layer fabric, comprising at least two layers of fabric according to any one of the previous embodiments, advantageously the two layers of fabric being sewn together.

[0050] Multilayer fabrics offer greater electromagnetic shielding than single-layer fabrics, and when the two outermost layers of a multilayer fabric are sewn together with their patterned sides facing the outside environment, the grid structure is completely hidden visually.

[0051] Yet another embodiment of the present invention relates to a method of manufacturing an electromagnetic shielding fabric, the electromagnetic shielding fabric comprising: a non-conductive fabric layer including a plurality of non-conductive warp yarns and a plurality of non-conductive weft yarns, the plurality of non-conductive warp yarns and the plurality of non-conductive weft yarns being made of a non-conductive material; a conductive fabric layer including a plurality of conductive warp yarns and a plurality of conductive weft yarns, the plurality of conductive warp yarns and the plurality of conductive weft yarns being at least partially made of a conductive material; Includes:

[0052] The non-conductive fabric layer defines the patterned surface of the electromagnetic shielding fabric, the conductive fabric layer defines the grid-like structure, and the non-conductive fabric layer and the conductive fabric layer are interwoven.

[0053] The method is: Weaving an electromagnetic shielding fabric by defining a plurality of sectors arranged adjacent to each other in the warp and / or weft directions, each of the sectors including at least one group of non-conductive warp yarns and one conductive warp yarn, and at least one non-conductive weft yarn and one conductive weft yarn. Includes: The group of non-conductive warp yarns includes at least two non-conductive yarns, and the group of non-conductive weft yarns includes at least two non-conductive yarns.

[0054] Advantageously, the step of weaving the electromagnetic shielding fabric by defining a plurality of sectors comprises, in each of the sectors: Submerging the conductive warp yarns below the conductive weft yarns at a first binding point; floating each of the non-conductive warp yarns in the group of non-conductive warp yarns above the conductive weft yarns at each second binding point; floating a conductive warp yarn over at least one non-conductive weft yarn in the group of non-conductive weft yarns at a third binding point in sectors arranged alternately along the warp and / or weft directions, the third binding point being woven adjacent to the first binding point (B1); Includes:

[0055] In one embodiment, the group of non-conductive warp yarns includes three non-conductive weft yarns.

[0056] In this case, the step of floating the conductive warp yarn over at least one non-conductive weft yarn in the group of non-conductive weft yarns at the third binding point includes: floating the conductive warp yarn at a single third binding point within each of the sectors. Includes:

[0057] In a different embodiment, the group of non-conductive weft yarns includes at least four non-conductive weft yarns, in which case the step of floating the conductive warp yarn over at least one non-conductive weft yarn in the group of non-conductive weft yarns at the third binding point comprises: floating the conductive warp yarns above the plurality of non-conductive weft yarns at each of the third binding points. Includes: In particular, each of the third binding points is spaced apart from the previous third binding point in the warp direction by at least three non-conductive weft yarns.

[0058] Further features and advantages of the present invention will become apparent from the following detailed description of several preferred embodiments thereof, as illustrated in the accompanying drawings.

[0059] The present invention will now be described with reference to several exemplary, non-limiting embodiments thereof, as illustrated in the accompanying drawings, which relate to different aspects of the invention. [Brief explanation of the drawings]

[0060] [Figure 1] 1 illustrates a portion of a fabric partially folded to reveal both sides, according to one embodiment of the present invention. [Figure 2a] FIG. 1 is a diagram showing a part of a binding pattern of a woven fabric according to a first embodiment of the present invention. [Figure 2b] 2a , a detail of the first sector of the woven fabric, focusing on a first bundling scheme of the conductive warp and weft yarns of the woven fabric; [Figure 2c] 2a , showing a detail of a second sector of the woven fabric, focusing on a second bundling scheme of the conductive warp and weft yarns of the woven fabric; [Figure 3a] FIG. 10 is a diagram showing a part of a binding pattern of a woven fabric according to a second embodiment of the present invention. [Figure 3b] 3b shows a detail of the first sector of the woven fabric of FIG. 3a, focusing on a first bundling scheme of the conductive warp and weft yarns of the woven fabric. [Figure 3c] 3b shows a detail of a second sector of the woven fabric of FIG. 3a, focusing on a second bundling scheme of the conductive warp and weft yarns of the woven fabric. [Figure 4a] 1 is a plot of the electromagnetic shielding effectiveness as a function of the frequency of electromagnetic radiation provided by a first sample of a woven fabric in accordance with one embodiment of the present invention. [Figure 4b] 1 is a plot of the electromagnetic shielding effectiveness as a function of the frequency of electromagnetic radiation provided by a first sample of a woven fabric in accordance with one embodiment of the present invention. [Figure 5a] 10 is a plot of the electromagnetic shielding effectiveness as a function of the frequency of the electromagnetic radiation provided by a second sample of a shielding fabric not embodying the present invention. [Figure 5b] 10 is a plot of the electromagnetic shielding effectiveness as a function of the frequency of the electromagnetic radiation provided by a second sample of a shielding fabric not embodying the present invention. [Figure 6a]10 is a plot of the electromagnetic shielding effectiveness as a function of the frequency of electromagnetic radiation provided by a third sample of another shielding fabric, not an embodiment of the present invention. [Figure 6b] 10 is a plot of the electromagnetic shielding effectiveness as a function of the frequency of electromagnetic radiation provided by a third sample of another shielding fabric, not an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0061] While the present invention can be embodied in several alternative ways, certain preferred embodiments are shown in the drawings and will be described in detail below. It should be understood, however, that there is no intention to limit the invention to the particular embodiments disclosed, but rather the invention is intended to cover all modifications, alternatives, and equivalents falling within the scope of the present invention as defined by the claims.

[0062] The use of the terms "for example," "such as," and "or" indicates open-ended, non-exclusive alternatives unless otherwise defined. The term "including" means "including but not limited to," unless otherwise defined.

[0063] 1 shows a portion of a fabric or textile 1 according to one embodiment of the present invention, the fabric or textile 1 including an aesthetically patterned surface 10 and a second, opposing, shielding surface 11. Specifically, a non-conductive textile layer forms the patterned surface 10 and is woven into the shielding surface 11 formed by a conductive textile layer.

[0064] The non-conductive fabric layer includes a plurality of warp and weft yarns woven into a pattern, the pattern being designed to reproduce a desired figure 101 on the patterned surface 10. Generally, the figure 101 is oriented in the warp direction w A and / or latitudinal direction w E is repeated periodically along

[0065] The warp and weft yarns of the non-conductive fabric layer are made of non-conductive material and will hereinafter be referred to as "non-conductive" warp yarns and "non-conductive" weft yarns, respectively.

[0066] Preferably, the non-conductive warp and non-conductive weft yarns of the non-conductive layer are made from natural fibers, more preferably from wool.

[0067] In the field of textiles, yarns can be classified based on their "fineness", which refers to the length of the yarn per unit weight. The unit of fineness is the "numbering" (Nm), which is an international standard measurement unit equivalent to 1 meter per gram, i.e. 1 Nm = 1 m / 1 g.

[0068] In an embodiment according to the present invention, the non-conductive warp yarns are wool yarns having a fineness of 60 / 2 Nm (i.e. each yarn comprises two yarns, each of which has a fineness of 60 m / g), while the non-conductive weft yarns are wool yarns having a fineness of 28 / 2 Nm (i.e. each yarn comprises two yarns, each of which has a fineness of 28 m / g), while more generally speaking the non-conductive warp yarns and non-conductive weft yarns have finenesses ranging from 8 / 1 Nm to 50 / 1 Nm.

[0069] The conductive fabric layer includes a plurality of warp and weft threads woven into a grid pattern 111, which is designed to create a so-called Faraday cage effect. In particular, the grid pattern 111 of the conductive layer is arranged in the shielding surface 11 in the warp direction w A and the latitudinal direction w E It comprises warp and weft threads spaced apart from one another in a regular and uniform pattern along the length of the weft.

[0070] The warp and weft threads of the conductive fabric layer are made of conductive material, and hereinafter the warp and weft threads of the conductive fabric layer are referred to as "conductive" warp threads and "conductive" weft threads, respectively.

[0071] The conductive warp and weft threads of the conductive layer are made from a mixture of natural fibers, more preferably wool fibers, and metal fibers, more preferably stainless steel fibers. Advantageously, the conductive warp and weft threads of the conductive layer are made from a yarn obtained by co-spinning stainless steel fibers with wool fibers. Preferably, advantageously, the conductive warp and weft threads of the conductive layer are made from a yarn obtained by spun metal fibers and natural fibers, with the proportion of metal fibers ranging from 5% to 50%, preferably 20%. In this example, the metal fibers are stainless steel fibers.

[0072] For example, the conductive warp yarns and conductive weft yarns have a yarn count ranging from 12.5 tex (ie, 12.5 g / km) to 125 tex (125 g / km).

[0073] Preferably, the conductive warp and conductive weft yarns are made of a mixture of wool fibers and stainless steel fibers and have a fineness of 50 / 2 Nm, i.e. each of the yarns comprises two yarns, each of the yarns having a fineness of 50 m / g.

[0074] The fabric 1 is woven in such a way that a non-conductive fabric layer and a conductive fabric layer are tightly interwoven with each other, and the grid pattern 111 has a continuous, uniform, and regular structure, and the conductive warp and weft yarns are invisible or substantially visually imperceptible to an observer from the pattern surface 10.

[0075] 2a, there is shown a portion of a binding pattern 2 according to a first embodiment of the present invention. In particular, the binding pattern 2 corresponds to the weave pattern visible from the pattern side 10 of the fabric.

[0076] The binding pattern 2 is based on a regular scheme with weft direction w EThe warp yarn 21 includes a plurality of conductive warp threads 21 and non-conductive warp threads 22 arranged crosswise. In particular, the conductive warp threads 21 and the non-conductive warp threads 22 are arranged based on a periodic structure of one conductive warp thread 21 and three non-conductive warp threads 22, i.e., a structure in which the ratio of the conductive warp threads to the non-conductive warp threads is 1:3.

[0077] Similarly, the binding pattern 2 is arranged in the warp direction w according to a regular scheme. A The fabric comprises a plurality of conductive weft threads 23 and non-conductive weft threads 24a, 24b arranged crosswise. In particular, the conductive weft threads 23 and non-conductive weft threads 24a, 24b are arranged in a periodic structure of one conductive weft thread 23 and two non-conductive weft threads 24a, 24b, i.e., a ratio of conductive weft threads to non-conductive weft threads is 1:2. Advantageously, the non-conductive weft threads 24a, 24b are dyed in roughly different colors.

[0078] The binding pattern 2 can be divided into multiple sectors 25a, 25b, each of which includes multiple binding points. Here, "binding point" refers to a point where a warp thread crosses a weft thread, passing over or under the weft thread. In this example, each of the sectors 25a, 25b includes a set of 12 binding points between a set of four warp threads and a set of three weft threads. Specifically, each of the warp thread sets includes one conductive warp thread 21 and three non-conductive warp threads 22, and each of the weft thread sets includes one conductive weft thread 23 and two non-conductive weft threads 24a, 24b.

[0079] Sectors 25a and 25b are in the radial direction w A and the latitudinal direction w E In this example, the sectors 25a, 25b can be divided into two sector groups. Specifically, the conductive warp yarns 21 and the conductive weft yarns 23 in the sectors 25a belonging to the first sector group are woven according to a first bundling scheme, and the conductive warp yarns 21 and the conductive weft yarns 23 in the sectors 25b belonging to the second sector group are woven according to a second bundling scheme.

[0080] The sector 25a belonging to the first sector group and the sector 25b belonging to the second sector group are spaced apart in the radial direction w A and the latitudinal direction w E That is, along each direction, sectors belonging to one sector group are alternately arranged with sectors belonging to another sector group.

[0081] 2b shows a first bundling scheme used to weave the conductive warp yarns 21 and conductive weft yarns 23 in sector 25a of the first sector group. The first bundling scheme includes a single first bundling point B1 (black block), where the conductive warp yarn 21 is submerged under the conductive weft yarn 23. The first bundling scheme also includes one second bundling point B2 (white block) for each non-conductive warp yarn 22, where the non-conductive warp yarn 22 floats above the conductive weft yarn 23. The first bundling scheme also includes a single third bundling point B3 (darker hatched block), where the conductive warp yarn 21 floats above one non-conductive weft yarn 24a, and where the conductive warp yarn 21 is submerged below another non-conductive weft yarn 24b at each of four bundling points B4 (lighter hatched blocks). The single third bundling point B3 of sector 25a is adjacent to the single first bundling point B1.

[0082] At the remaining fifth binding point B5 (hatched block), the non-conductive warp yarns 22 may float or sink to replicate the desired aesthetic design on the pattern surface 10.

[0083] The second bundling scheme shown in FIG. 2c corresponds to the first bundling scheme except for the absence of the third bundling point B3. In other words, the second bundling scheme includes a single first bundling point B1 (black block), where the conductive warp yarns 21 are submerged below the conductive weft yarns 23. Furthermore, the second bundling scheme includes one second bundling point B2 (white block) for each non-conductive warp yarn 22, where the non-conductive warp yarns 22 are suspended above the conductive weft yarns 23. Furthermore, at each fourth bundling point B4 (lightly hatched block), the conductive warp yarns 21 are submerged below the non-conductive weft yarns 24a, 24b. At the remaining fifth bundling point B5 (diagonally hatched block), the non-conductive warp yarns 22 may be suspended or submerged to reproduce the desired aesthetic design on the pattern surface 10.

[0084] The applicant believes that according to such a special binding pattern, i.e., in the warp direction w A and the latitudinal direction w E It has been found that the first bundling scheme and the second bundling scheme, which alternately arrange the conductive warp yarns 21 and the conductive weft yarns 23 along the weft direction and the weft direction of the woven fabric, enable the weaving of a wide variety of aesthetic patterns on the pattern surface 10, even for highly complex patterns. Furthermore, the conductive warp yarns 21 and the conductive weft yarns 23 are invisible or substantially unrecognizable on the pattern surface 10, and therefore do not affect the quality of the design on the pattern surface 10. At the same time, the grid pattern 111 has a uniform and regular structure including the conductive warp yarns 21 and the conductive weft yarns 23, and the conductive warp yarns 21 and the conductive weft yarns 23 include regular and uniform contact points both mechanically and electrically along the weft and warp directions of the woven fabric.

[0085] Furthermore, the patterned surface 10 and the shielding surface 11 of the fabric 1 according to the present invention are firmly bonded together by being woven together along the weft and warp directions of the fabric, so that the lattice structure remains substantially unchanged even when the fabric is folded or stretched during use, thereby providing reliable electromagnetic shielding for many applications.

[0086] 3a, a portion of a bonding pattern 3 according to a second embodiment of the present invention is shown. In particular, the bonding pattern 3 corresponds to the weave pattern observable on the pattern side 10 of the fabric 1.

[0087] The bond pattern 3 is arranged in the weft direction w according to a regular scheme. E The warp yarn 31 includes a plurality of conductive warp threads 31 and non-conductive warp threads 32 arranged crosswise. In particular, the conductive warp threads 31 and the non-conductive warp threads 32 are arranged based on a periodic structure of one conductive warp thread 31 and nine non-conductive warp threads 32, i.e., a structure in which the ratio of the conductive warp threads to the non-conductive warp threads is 1:9.

[0088] Similarly, the binding pattern 3 is arranged in the warp direction w according to a regular scheme. A The patterned surface 10 includes a plurality of conductive weft yarns 33 and non-conductive weft yarns 34a-34g arranged crosswise. In particular, the conductive weft yarns 33 and the non-conductive weft yarns 34a-34g are arranged based on a periodic structure of one conductive weft yarn 33 and six non-conductive weft yarns 34a-34f, i.e., a ratio of the conductive weft yarn to the non-conductive weft yarns is 1:6. Advantageously, the non-conductive weft yarns 34a-34f are dyed in more than two colors to provide a multicolor aesthetic design on the patterned surface 10.

[0089] The binding pattern 3 can be divided into a number of sectors 35a, 35b of possible binding points between warp and weft yarns. Each sector 35a, 35b therefore includes a set of 70 binding points between a set of 10 warp yarns and a set of 7 weft yarns. In particular, each set of warp yarns includes one conductive warp yarn 31 and nine non-conductive warp yarns 32, and each set of weft yarns includes one conductive weft yarn 33 and six non-conductive weft yarns 34a-34f.

[0090] Sectors 35a and 35b are in the radial direction w A and the latitudinal direction w EIn this example, the sectors 35a, 35b can be divided into two sector groups. Specifically, the conductive warp yarns 31 and conductive weft yarns 33 in the sectors 35a belonging to the first sector group are woven according to a first bundling scheme, and the conductive warp yarns 31 and conductive weft yarns 33 in the sectors 35b belonging to the second sector group are woven according to a second bundling scheme.

[0091] The sector 35a belonging to the first sector group and the sector 35b belonging to the second sector group are spaced apart in the radial direction w A and the latitudinal direction w E and are arranged to intersect with each other.

[0092] As best shown in FIG. 3b, the first bundling scheme includes a single first bundling point B1 (black block), where the conductive warp yarns 31 are submerged below the conductive weft yarns 33. Additionally, the first bundling scheme includes one second bundling point B2 (white block) for each non-conductive warp yarn 32, where the non-conductive warp yarns 32 are suspended above the conductive weft yarns 33. Additionally, the first bundling scheme includes one third bundling point B3 (darker hatched block), where the conductive warp yarns 31 are suspended above one non-conductive weft yarn 34a. Preferably, the first third bundling point B3 in sector 35a is adjacent to the single first bundling point B1.

[0093] The first bundling scheme also includes a third bundling point B3 (darker hatched block) at which the conductive warp thread 31 floats above one non-conductive weft thread 34a, and at each of the fourth bundling points B4 (lighter hatched blocks) the conductive warp thread 31 sinks below another non-conductive weft thread 34b-34d and 34f.

[0094] At the remaining fifth binding point B5 (hatched block), the non-conductive warp yarns may float or sink to reproduce the desired aesthetic design on the pattern surface 10.

[0095] The second bundling scheme shown in Figure 3c includes a single first bundling point B1 (black block), where the conductive warp yarns 31 are submerged below the conductive weft yarns 33. The second bundling scheme includes one second bundling point B2 (white block) for each non-conductive warp yarn 32, where the non-conductive warp yarns 32 are suspended above the conductive weft yarns 31.

[0096] The second bundling scheme also includes a single third bundling point B3 (darker hatched block), where the conductive warp thread 31 floats above one non-conductive weft thread 34c, and at each of the fourth bundling points B4 (lighter hatched blocks), the conductive warp thread 31 sinks below the other non-conductive weft threads 34a, 34b, 34d-34f.

[0097] At the remaining fifth binding point B5 (hatched block), the non-conductive warp yarns may float or sink to reproduce the desired aesthetic design on the pattern surface 10.

[0098] As shown in Figure 3a, the radial direction w A , the conductive warp yarns 31 float on one of the weft yarns 34a-34f every three or four weft yarns over the entire length of the fabric 1. In the example here, two successive floats of the conductive warp yarns 31 are separated by three weft yarns 34a-34f, and the next two successive floats of the conductive warp yarns 31 are separated by four weft yarns 33, 34a-34f, this sequence preferably being spaced apart in the warp direction w A is repeated periodically along

[0099] Applicant conducted tests aimed at evaluating the electromagnetic shielding properties of fabric samples according to examples of the present invention and comparative fabric samples having different characteristics from the fabrics according to examples of the present invention.

[0100] Specifically, the test involves directing electromagnetic radiation of known power toward a textile sample and measuring the power of the electromagnetic radiation on the opposite side of the textile sample. Specifically, the textile sample was placed over an opening in a box made of a material that is impermeable to the electromagnetic waves used in the test. Inside the box, a receiver was placed behind the textile sample, configured to measure the power of any electromagnetic radiation within the box. Finally, an antenna was placed one meter from the textile sample, ensuring there were no obstacles between the antenna and the textile sample.

[0101] <Test 1> In the first test, a first fabric sample S1 manufactured according to an embodiment of the present invention was used. The first fabric sample S1 included conductive yarns made by blending 95% wool fibers and 5% stainless steel fibers. Specifically, both the conductive warp and weft yarns had finenesses of 50 / 2 Nm. The non-conductive warp yarns had finenesses of 60 / 2 Nm, and the non-conductive weft yarns had finenesses of 28 / 2 Nm. In the first fabric sample S1, the ratio of conductive warp yarns to non-conductive warp yarns was 3:1, and the ratio of conductive weft yarns to non-conductive weft yarns was 2:1.

[0102] As shown in Figures 4a and 4b, the first fabric sample S1 provides substantial shielding from electromagnetic radiation, i.e., attenuation of more than 20 dB for frequencies above 110 MHz. Specifically, in the radio frequency range from 400 MHz to 1 GHz, the average attenuation of electromagnetic radiation is more than 40 dB. In the high frequency range from 1 GHz to 20 GHz, the average attenuation of electromagnetic waves is 25 dB to 35 dB.

[0103] That is, on average, the fabric produced using the first textile sample S1 reduces the energy associated with any incident electromagnetic radiation having a frequency ranging from 110 MHz to 20 GHz by an attenuation factor ranging from 100 to 10. In other words, for the above-mentioned frequency range, the energy associated with the electromagnetic radiation measured downstream of the fabric has a value ranging from 1% to 0.01% of the energy of the electromagnetic radiation measured upstream of the fabric.

[0104] It should be noted that the overall radio frequency range considered, i.e., the range from 110 MHz to 20 GHz, includes most of the frequency bands used in wireless communication systems, and in particular most of the frequency bands used by standards such as GSM, UMTS, LTE / LTE-A, 5G, Wi-Fi, etc.

[0105] In particular, Table 1 shows the attenuation provided by the first fabric sample S1 over frequencies that include the main frequency bands used in cellular and WLAN networks.

[0106] [Table 1]

[0107] The electromagnetic shielding properties of the first fabric sample S1 were also tested at higher frequencies (e.g., frequencies used in 5G networks), and the results are shown in Table 2 below.

[0108] [Table 2]

[0109] From the above, it is clear that the first textile sample S1 provides substantial attenuation (i.e., at least 50 times attenuation) even against electromagnetic radiation generated by devices operating in the frequency range from 20 GHz to 40 GHz, i.e., millimeter wave (mmWave) wavelengths used in 5G.

[0110] In conclusion, the fabric produced using the first textile sample S1 of the present invention is able to attenuate the energy associated with electromagnetic radiation in the frequency band used by wireless communication systems, i.e., the band from 110 MHz to 40 GHz, to a negligible level (at least less than 3%), thereby preventing harmful levels of energy from reaching the body covered by the fabric or preventing effective wireless communication between the two sides of the fabric.

[0111] <Comparative Test 1> The second fabric sample S2 includes conductive yarns made from a blend of 98% wool fiber and 2% steel fiber. Specifically, both the conductive warp and conductive weft yarns have a fineness of 50 / 2 Nm. The non-conductive warp yarns have a fineness of 60 / 2 Nm, and the non-conductive weft yarns have a fineness of 28 / 2 Nm. The second fabric sample S2 has a conductive warp to non-conductive warp ratio of 9:1 and a conductive weft to non-conductive weft ratio of 7:1.

[0112] In other words, the conductive yarns used to weave the second fabric sample S2 are made of non-conductive material / conductive material in a ratio lower than the minimum ratio according to the present invention.

[0113] As shown in Figures 5a and 5b, the second fabric sample S2 provides significantly less shielding from electromagnetic radiation than the first fabric sample S1.

[0114] In particular, the second fabric sample S2 provides the highest average attenuation, i.e., about 25 dB, only in the frequency range from 700 MHz to 1 GHz, and the average attenuation effect decreases for the frequency range from 1 GHz to 20 GHz, providing an average attenuation of about 25 dB for the frequency range from 1 GHz to 5 GHz, and then suddenly decreases to a significantly lower average value (e.g., between 10 dB and 5 dB) for the frequency range from 5 GHz to 20 GHz.

[0115] Table 3 shows the attenuation provided by the second fabric sample S2 for the same frequencies considered in Table 1 for the first fabric sample S1.

[0116] [Table 3]

[0117] The electromagnetic shielding properties of the second fabric sample S2 were also tested for higher frequencies (e.g., frequencies used in 5G networks), and the results are shown in Table 4 below.

[0118] [Table 4]

[0119] From the above, it was found that the second fabric sample S2 had significantly lower electromagnetic shielding performance than the first fabric sample S1 over the entire frequency range considered.

[0120] <Comparative Test 2> The third fabric sample S3 includes conductive yarns made by blending 51% cotton viscose (CV), 25% wool fiber, 17% cellulose-derived fiber (e.g., Tencel® fiber), and 6% steel fiber. Specifically, the conductive warp and conductive weft yarns both have a fineness of 50 / 2 Nm. The non-conductive warp yarns have a fineness of 70 / 2 Nm, and the non-conductive weft yarns have a fineness of 50 / 2 Nm. The third fabric sample S3 has a conductive warp to non-conductive warp ratio of 5:1 and a conductive weft to non-conductive weft ratio of 5:1. The third fabric sample S3 was woven based on prior art, such as that described in Chinese Patent No. 105483906.

[0121] As shown in Figures 6a and 6b, the third fabric sample S3 has significantly less shielding from electromagnetic radiation than the first fabric sample S1.

[0122] In particular, the third fabric sample S3 provides the highest average attenuation only in the frequency range from 300 MHz to 1 GHz, i.e., about 30 dB, and the average attenuation effect decreases for the frequency range from 1 GHz to 20 GHz, providing an average attenuation of about 30 dB for the frequency range from 1 GHz to 5 GHz, and decreasing to an average of less than 20 dB for the frequency range from 8 GHz to 20 GHz.

[0123] Table 5 shows the attenuation provided by the third fabric sample S3 for the same frequencies considered in Table 1 for the first fabric sample S1.

[0124] [Table 5]

[0125] The electromagnetic shielding properties of the third fabric sample S3 were also tested for even higher frequencies (e.g., frequencies used in 5G networks), and the results are shown in Table 6 below.

[0126] [Table 6]

[0127] From the above, it can be seen that the third fabric sample S3 has significantly lower electromagnetic shielding performance than the first fabric sample S1 over the entire frequency range considered, especially in the range from 20 GHz to 40 GHz.

[0128] Table 7 below shows attenuation data (in dB) for specific frequencies of the first fabric sample S1 woven in accordance with the present invention and the third fabric sample S3. As can be easily seen by comparing the data in Table 7, the first fabric sample S1 according to the present invention provides higher and more uniform electromagnetic shielding properties overall than the third fabric sample S3, even though the third fabric sample S3 is made from conductive yarns having a higher proportion of conductive material.

[0129] [Table 7]

[0130] The invention thus conceived is susceptible to numerous variations and modifications, all of which are within the scope of the inventive concept.

[0131] For example, in an embodiment of the present invention, the conductive yarn is spun from stainless steel fibers having a length ranging from 6 μm to 12 μm, preferably 8 μm, and each of the yarns in the conductive yarn is spun to a fineness ranging from 8 Nm to 50 Nm.

[0132] Also, in another embodiment of the invention, the threads comprise different textile fibres and / or yarns, in particular instead of yarns comprising only wool, the conductive and / or non-conductive threads can be made by yarns spun from a blend of wool, polyamide (PA) polymer, cotton, silk and / or linen.

[0133] The preferred ratio between the conductive warp yarns and the non-conductive warp yarns is 1:3 and 1:9 as described above, but even if the ratio between the conductive warp yarns and the non-conductive warp yarns is different, for example, 1:2, 1:5, or 1:7, this does not prevent the implementation of the present invention.

[0134] In an alternative embodiment (not shown in the drawings), nothing prevents a multi-layer fabric from being provided that includes two or more layers of the above-described shielding fabric. For example, one layer of the multi-layer fabric can be sewn over another layer of fabric. Preferably, the multiple layers of fabric are sewn together with their respective shielding surfaces facing inwards.

[0135] Other technically equivalent details and materials may be used, and the shapes, dimensions and distances of the various components may also be any as required.

Claims

1. An electromagnetic shielding fabric (1, 2, 3), a non-conductive fabric layer (101) comprising a plurality of non-conductive warp threads (22, 32) and a plurality of non-conductive weft threads (24a, 24b, 34a to 34f), wherein the plurality of non-conductive warp threads (22, 32) and the plurality of non-conductive weft threads (24a, 24b, 34a to 34f) are made of a non-conductive material; a conductive fabric layer (111) comprising a plurality of conductive warp threads (21, 31) and a plurality of conductive weft threads (23, 33), the plurality of conductive warp threads (21, 31) and the plurality of conductive weft threads (23, 33) being at least partially made of a conductive material; Including, The non-conductive fabric layer (101) defines a patterned surface (10) of the electromagnetic shielding fabric (1, 2, 3), the conductive fabric layer (111) defines a grid-like structure (11), and the non-conductive fabric layer (101) and the conductive fabric layer (111) are interwoven with each other; the electromagnetic shielding fabric (1, 2, 3) comprises a plurality of sectors (25a, 25b, 35a, 35b) arranged adjacent to one another in the warp direction and / or the weft direction, each of the sectors (25a, 25b, 35a, 35b) comprising a group of at least one non-conductive warp thread (22, 32) and one conductive warp thread (21, 31), and at least one non-conductive weft thread (24a, 24b, 34a-34f) and one conductive weft thread (23, 33); the group of non-conductive warp yarns (22, 32) includes at least two non-conductive yarns, and the group of non-conductive weft yarns (24a, 24b, 34a-34e) includes at least two non-conductive yarns; In the patterned surface of the electromagnetic shielding fabric, each of the sectors (25a, 25b, 35a, 35b) has: The conductive warp yarns (21, 31) are sunk below the conductive weft yarns (23, 33), and a first binding point (B １ , binding point), and For each of the non-conductive warp yarns in the group of non-conductive warp yarns (22, 32), a second binding point (B) is provided at which the non-conductive warp yarns (22, 32) float above the conductive weft yarns (23, 33). ２ )and, further comprising The sectors (25a, 25b, 35a, 35b) arranged alternately along the longitudinal direction and / or the latitudinal direction are a third binding point (B) at which the conductive warp yarn (21, 31) floats on at least one of the non-conductive weft yarns (24a, 24b) in the group of the non-conductive weft yarns (24a, 24b, 34a to 34f); ３ ) and the first binding point (B) where the conductive warp yarns (21, 31) are sunk below the conductive weft yarns (23, 33). １ ) adjacent to the third binding point (B ３ ), Including, Electromagnetic shielding fabric (1, 2, 3).

2. The group of non-conductive warp yarns (22) includes three non-conductive warp yarns, The sectors (25a, 25b, 35a, 35b) arranged alternately along the warp direction and / or the weft direction are connected to the third binding point (B) where the conductive warp yarn (21) floats on the at least one non-conductive weft yarn (24a). ３ ), including Electromagnetic shielding fabric (1, 2, 3) according to claim 1.

3. said group of non-conductive weft yarns (34a-34f) comprises at least four non-conductive weft yarns; Each of the sectors (25a, 25b, 35a, 35b) has a further third binding point (B) where the conductive warp yarn (31) floats on the at least one non-conductive weft yarn (34c, 34e). ３ ) and the further third binding point (B ３ ) are at least three non-conductive weft yarns (34a to 34f), and each of the three non-conductive weft yarns (34a to 34f) is connected to the third binding point (B ３ ) are located away from Electromagnetic shielding fabric (1, 2, 3) according to claim 1.

4. First binding point (B １ ) are spaced apart from the first bundling point (B) of another sector (25a, 25b, 35a, 35b) in the longitudinal and / or lateral directions, preferably in the longitudinal and lateral directions, at a distance ranging from 1.5 mm to 3.5 mm, preferably 2 mm. １ ) are located away from Electromagnetic shielding fabric (1, 2, 3) according to any one of claims 1 to 3.

5. each of the sectors (25a, 25b, 35a, 35b) includes conductive warp yarns (21, 31) and non-conductive warp yarns (22, 32) in a ratio selected from the group consisting of 1:3, 1:5, 1:7, and 1:9; Electromagnetic shielding fabric (1, 2, 3) according to any one of claims 1 to 4.

6. the conductive warp yarns (21, 31) and the conductive weft yarns (23, 33) are made of yarns obtained by spinning metal fibers, preferably stainless steel fibers, and yarns obtained by spinning natural fibers, preferably wool fibers, with the proportion of metal fibers ranging from 5% to 50%, preferably 20%; Electromagnetic shielding fabric (1, 2, 3) according to any one of claims 1 to 5.

7. The conductive warp yarns (21, 31) and the conductive weft yarns (23, 33) have a yarn count in the range of 12.5 g / km to 125 g / km. Electromagnetic shielding fabric (1, 2, 3) according to claim 6.

8. The conductive warp threads (21, 31) and the conductive weft threads (23, 33) are made of yarns having a fineness ranging from 8 m / g to 50 m / g, and preferably, each of the conductive warp threads (21, 31) and each of the conductive weft threads (23, 33) includes two yarns having a fineness of 50 m / g. Electromagnetic shielding fabric (1, 2, 3) according to claim 6 or 7.

9. the non-conductive warp yarns (22, 32) are made of wool, and each of the non-conductive warp yarns (22, 32) includes two yarns having a fineness of 60 m / g; the non-conductive weft yarns (24a, 24b, 34a to 34f) are made of wool, and each of the non-conductive weft yarns (24a, 24b, 34a to 34f) includes two yarns having a fineness of 28 m / g; Electromagnetic shielding fabric (1, 2, 3) according to any one of claims 1 to 8.

10. 10. The method of claim 1, further comprising the steps of: providing a shielding device for shielding a garment comprising at least two electromagnetic shielding fabrics (1, 2, 3) according to any one of claims 1 to 9, said at least two electromagnetic shielding fabrics (1, 2, 3) being sewn together; Multilayer fabric.

11. A method for manufacturing an electromagnetic shielding fabric (1, 2, 3), comprising the steps of: The electromagnetic shielding fabric (1, 2, 3) a non-conductive woven layer (101) including a plurality of non-conductive warp threads (22, 32) and a plurality of non-conductive weft threads (24a, 24b, 34a to 34f), wherein the plurality of non-conductive warp threads (22, 32) and the plurality of non-conductive weft threads (24a, 24b, 34a to 34f) are made of a non-conductive material; a conductive woven layer (111) including a plurality of conductive warp threads (21, 31) and a plurality of conductive weft threads (23, 33), the plurality of conductive warp threads (21, 31) and the plurality of conductive weft threads (23, 33) being at least partially made of a conductive material; Including, The non-conductive fabric layer (101) defines a patterned surface (10) of the electromagnetic shielding fabric (1, 2, 3), the conductive fabric layer (111) defines a grid-like structure (11), and the non-conductive fabric layer (101) and the conductive fabric layer (111) are interwoven with each other; The method comprises: weaving the electromagnetic shielding fabric (1, 2, 3) by defining a plurality of sectors (25a, 25b, 35a, 35b) arranged adjacent to each other in the warp and / or weft direction, each of the sectors (25a, 25b, 35a, 35b) comprising a group of at least one non-conductive warp thread (22, 32) and one conductive warp thread (21, 31), and at least one non-conductive weft thread (24a, 24b, 34a-34f) and one conductive weft thread (23, 33); Including, the group of non-conductive warp yarns (22, 32) includes at least two non-conductive yarns, and the group of non-conductive weft yarns (24a, 24b, 34a-34e) includes at least two non-conductive yarns; The step of weaving the electromagnetic shielding fabric (1, 2, 3) by defining the plurality of sectors (25a, 25b, 35a, 35b) comprises: First binding point (B １ ) a step of submerging the conductive warp yarns (21, 31) below the conductive weft yarns (23, 33); Each second binding point (B ２ ) floating each of the non-conductive warp yarns in the group of non-conductive warp yarns (22, 32) above the conductive weft yarns (23, 33); Among the sectors (25a, 25b, 35a, 35b) alternately arranged along the longitudinal direction and / or the lateral direction, a third bundling point (B ３ ) a step of floating the conductive warp yarn (21, 31) on at least one of the non-conductive weft yarns (24a, 24b) in the group of the non-conductive weft yarns (24a, 24b, 34a to 34f), ３ ) to the first binding point (B １ ) adjacent to the step, and Including, method.

12. The group of non-conductive warp yarns (22) includes three non-conductive warp yarns, Third binding point (B ３ ) the step of floating the conductive warp yarn (21, 31) over at least one of the non-conductive weft yarns (24a, 24b) in the group of the non-conductive weft yarns (24a, 24b, 34a-34f) comprises: Within each of the sectors (25a, 25b, 35a, 35b), a single third binding point (B ３ ) floating the conductive warp yarns (21, 31) in Including, The method of claim 11.

13. said group of non-conductive weft yarns (34a-34f) comprises at least four non-conductive weft yarns; Third binding point (B ３ ) the step of floating the conductive warp yarn (21, 31) over at least one of the non-conductive weft yarns (24a, 24b) in the group of the non-conductive weft yarns (24a, 24b, 34a-34f) comprises: Third binding point (B ３ ) at each of the third binding points (B), the conductive warp yarns (21, 31) are floated on a plurality of non-conductive weft yarns (24a, 34a), ３ ) are at least three non-conductive weft yarns (34a to 34f), and each of the three non-conductive weft yarns (34a to 34f) is connected to the third binding point (B ３ ) are located away from the step Including, The method of claim 11.

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