WO2003035951A2 - Textiles fadenartiges gewebe, textiles flächengebilde, gewebe bzw. gaze, bekleidungsstück sowie baumaterial - Google Patents
Textiles fadenartiges gewebe, textiles flächengebilde, gewebe bzw. gaze, bekleidungsstück sowie baumaterial Download PDFInfo
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- WO2003035951A2 WO2003035951A2 PCT/DE2002/003885 DE0203885W WO03035951A2 WO 2003035951 A2 WO2003035951 A2 WO 2003035951A2 DE 0203885 W DE0203885 W DE 0203885W WO 03035951 A2 WO03035951 A2 WO 03035951A2
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- Prior art keywords
- thread
- electrically conductive
- fibers
- textile
- fabric
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Classifications
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
- D02G3/441—Yarns or threads with antistatic, conductive or radiation-shielding properties
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D1/00—Woven fabrics designed to make specified articles
- D03D1/0035—Protective fabrics
- D03D1/0058—Electromagnetic radiation resistant
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/16—Physical properties antistatic; conductive
Definitions
- the invention relates to a textile thread-like structure made of fibers with a conductive insert, a textile revenge structure, a fabric made of textile thread-like structures, a gauze or a fabric with weft and warp threads, a piece of clothing and a building material.
- a large number of textile thread-like structures or fabrics are known from the prior art, which, for example, have metal wires. Such fabrics are said to be impermeable to electromagnetic radiation in particular or to strongly attenuate the electromagnetic radiation, so that the fabrics on the one hand have electrically conductive properties and on the other hand ensure high and effective protection against radiation.
- WO 93/24689 describes a composite yarn which is made from textile fibers of the same or different types and is twisted with a metal wire made of annealed, silver-plated or gold-plated copper or the like.
- the publication EP 0 250 260 AI describes the use of a metal-containing composite yarn for shielding against electrosmog, the composite yarn consisting of a core and a sheath.
- the core essentially contains a continuous metallic filament, possibly reinforced by a non-metallic filament or yarn, the covering containing a non-metallic filament or non-metallic yarns which is or are wound around the core and at least 70% of the outer surface of the Composite yarns make up and make up and the non-metallic filaments are formed from chemical or synthetic fibers or natural fibers.
- the composite yarn was created by twisting and has its advantages and disadvantages.
- a further method for producing an electrically conductive composite yarn from an electrically conductive metallic component and a textile component is described in document EP 0 816 543 A2, this document corresponding to the textile component as a sliver made of textile fibers on the side and at the same time an endless, electrically conductive component , coated, monofilament metal thread is fed directly centrally to the spinning station of a ring spinning machine in a spinning process and the electrically conductive monofilament metal thread is spun at least approximately without traction with the textile fibers of a sliver fed to the spinning station with multiple stretching to form a single composite yarn.
- the published patent application DE 30 19 151 A1 also describes an electrically conductive yarn which has a core of two copper wires, that is to say of monofilament metal threads, which are twisted with rayon threads or other non-conductive threads.
- a thread is described in US Pat. No. 3,639,807, which consists of an electrically non-conductive strand into which an electrically conductive insulated insert is twisted. This insert has a conductive core, which is surrounded by an electrically non-conductive shell.
- a reinforcing yarn is described in the publication DE 693 06 452 T2, which consists of both conductive and non-conductive fibers. The two types of fibers are mixed together and are arranged approximately parallel to each other. However, the yarn taught here has only a low conductivity.
- the object of the invention is to provide a textile thread with which, among other things, a textile fabric, such as a fabric, can be produced which sufficiently or almost completely shields against electromagnetic radiation.
- the object of the invention is achieved on the one hand by a textile thread-like structure which has fibers and at least one electrically conductive insert, at least some of the fibers being electrically conductive.
- the present invention is therefore based on the basic knowledge that, for a sufficiently shielding textile material, not only the conductivity of a thread-like structure, as can be ensured by a wire or a similar conductive monofilament, but also the conductivity of the materials present between such thread-like structures or spaces is important.
- the present invention assumes, in the aforementioned solution, that the at least one electrically conductive insert can ensure a very high conductivity, which is suitable for compensating for potential differences even over long distances, while the electrically conductive part of the fibers, in particular for short-wave rays provides a sufficiently large interaction width, which is not possible due to the electrically conductive insert, since high-frequency rays can pass it.
- electrically conductive fibers especially if they include graphite, for example, are not such good conductors that the overall conductivity of a textile structure can be increased considerably.
- the good shielding properties result in particular from the interaction of the electrically conductive insert with the electrically conductive fibers, the electrically conductive fibers being essential for short distances and the electrically conductive insert for long distances, and an electrically conductive fiber being used their proximity to an electrically conductive insert is also adjusted in terms of their potential over greater distances, and the interaction cross section of the electrically conductive insert is considerably expanded by the electrically conductive fibers surrounding it. According to the available knowledge, this combination is responsible for the extraordinary shielding properties of this solution.
- a “textile thread-like structure” means more or less long, fine structures that, for example, are spun into yarns or into other textile structures. steps can be used.
- the textile thread-like structure can be particularly suitable for twisting, spinning, forging, weaving, knitting, twisting and similar processing steps, as are known in particular from the textile industry.
- These more or less long, fine structures can be formed from natural fibers, such as fibers of a cotton or animal wool, and / or synthetic fibers, such as chemical fibers, mineral fibers, glass fibers, metal fibers or the like.
- the fibers of such a textile thread-like structure can have different lengths.
- the fibers can comprise “infinitely” long polymer fibers and on the other hand finite long staple fibers, the length of the staple fibers being able to vary. This depends, for example, on their areas of use.
- the length of a staple fiber is preferably less than 100 mm or less than 85 mm, in particular less than 65 mm.
- Both the natural fibers described above and the artificial fibers described above preferably have a fiber thickness of less than 5 mm or less than 3 mm, in particular less than 2.5 mm, since with dimensions going beyond this it is difficult for textile structures can be spoken.
- the electrically conductive fibers can basically be conventional fibers with no or very low conductivity and can be made electrically conductive by an appropriate aftertreatment.
- an electrically conductive coating e.g. made of metal or graphite. This has the advantage that the fibers according to the invention can be provided relatively inexpensively.
- such a coating can be applied to the individual fibers beforehand or also subsequently onto or into the fiber composite.
- the coating advantageously influences other properties of the thread-like structure in addition to the electrical conductivity.
- such a coating can be chosen such that it promotes adhesion of the fibers to one another and / or to the metallic insert.
- such a coating, which promotes conductivity can also promote or improve the electrical contact resistances between the conductive fibers with one another or between the conductive fibers and the conductive insert, in particular when a subsequent application is carried out also an electrical rically conductive connection between fibers and conductive insert can be realized.
- both natural and synthetic fibers can be coated accordingly.
- electrically conductive fibers can also be used as fibers. These can be formed, for example, from metal or from conductive plastics, in particular from conductive polymers. They can also have metallic components or conductive components. It is also conceivable to use fibers which have been improved or made conductive by suitable physical or chemical measures in their conductive properties.
- these polymer fibers described are fibers made of a polymer
- these polymer fibers can consist of one filament or several filaments and / or one multifilament or several multifilaments.
- An embodiment variant provides that at least some of the electrically conductive fibers have a different electrical conductivity. It goes without saying that the textile thread-like structure can be produced from a large number of different fibers. In order to achieve a particularly favorable mix of the textile thread-like structure, for example with regard to the electrical conductivity, the structure of the structure and the production costs, it is particularly advantageous if the textile thread-like structure has electrically conductive fibers which have a different electrical conductivity.
- the textile fibrous structure has a conductive portion of fibers and a non-conductive portion of fibers.
- a composition can also be used to advantageously adapt the material properties of the structure according to the invention to given conditions.
- the term “electrically conductive” is preferably used to refer to materials which are relatively good at conducting an electrical current.
- the conductors are opposed by insulators or non-conductive materials which cannot, or only to a very limited extent, conduct electrical current Are "electrically conductive".
- the conductive portion has at least a specific resistance of less than 100 ⁇ mm 2 / m.
- non-conductive or poorly conductive fibers can be added if this does not impair the conductive properties to a required extent. In particular, this allows other properties, such as the texture, to be influenced, since the remaining electrically conductive fibers, like a Faraday cage, can have a shielding or reflecting or absorbing effect.
- the textile thread-like structure has good electrical conductivity overall and nevertheless good thread properties, such as good weavability and the like.
- This has a particularly positive effect on the shielding ability of the textile thread-like structure with regard to electromagnetic radiation or with regard to an electrostatic or electrodynamic field.
- the poorly conductive portion has at least a specific resistance of more than 0.017 ⁇ > mm 2 / m.
- a proportion of fibers with this specific resistance value requires a good distinction between conductive and non-conductive or insulating fibers. It is understood that the relative difference between conductive fibers and non-conductive fibers remains in any case in that the conductive fibers, even if the boundaries between insulators and conductors are fluidly defined in the art, better than non-conductive fibers conduct electrical current.
- the textile thread-like structure it is possible, inter alia, to bring the electrically conductive insert at least partially into operative connection with the more or less electrically conductive fibers, so that not only the electrically conductive insert counteracts penetration of the textile thread-like structure by electromagnetic radiation , but that preferably the entire textile thread-like structure is able to shield against unwanted radiation.
- the electrically conductive insert it is possible for the electrically conductive insert to be incorporated into the textile thread-like structure so that it migrates, so that the electrically conductive insert reaches the surface of the textile thread-like structure at least in sections.
- the electrically conductive insert can be located decentrally in the textile thread-like structure, it being advantageous if the electrically conductive insert is arranged at least in regions on the surface of the textile thread-like structure. In this way, the electrically conductive insert can also come into contact with one another with other conductors or with other electrically conductive inserts or with other areas of the same electrically conductive insert, as a result of which a network can be formed which enables good shielding. Possible gaps and intermediate spaces in this network can be bridged by the electrically conductive fibers according to the invention.
- a preferred embodiment variant provides that the textile thread-like structure has an electrically conductive fiber content of more than 1 percent by weight, preferably 5 or more percent by weight. As a result of this, the textile bevel-like structure as a whole has a minimum shielding with regard to electromagnetic radiation.
- the electrically conductive fiber content can be more than 5 percent by weight. As a result, an extensive increase in the performance of the shielding properties with respect to electromagnetic radiation is achieved.
- the percentages by weight relate to the fiber content of the textile thread-like structure, without taking into account the proportion of the electrically conductive insert.
- the electrically conductive insert is a monofilament thread or wire.
- the electrically conductive insert is not only limited to a monofilament thread, but can be formed by a large number of interacting electrically conductive fibers, such as, for example, a metal wire formed from filaments or a cable.
- the textile thread-like structure can in particular also be a thread made of multifilaments, which has a metallic or conductive portion as an electrically conductive insert.
- the textile thread-like structure is a textile thread.
- the textile thread-like structure according to the invention in the form of a textile thread makes it possible to produce garments or other textiles from this textile thread by means of textile processes, which allow good wearing comfort and at the same time have an almost complete shielding against electromagnetic radiation, depending on the processing.
- the term "textile thread” is understood here to mean a thin, long structure which is present in a certain fineness and usually consists of twisted or spun natural or synthetic fibers, which is formed in particular essentially from staple fibers, filaments and / or multifilaments.
- the textile thread is suitable for example when weaving as warp thread or weft thread and it can also be used in knitting or knitting, in braiding and sewing.
- the person skilled in the art recognizes that the textile thread-like structure can be can be used for a variety of other applications.
- the textile thread-like structure is a yarn or thread.
- Such semi-finished textile products are also suitable for further processing using known methods to form textiles with suitable shielding properties.
- the term “yarn” is understood to mean in particular a thread-like textile product produced by mechanical spinning processes from fibers of a few centimeters in length.
- thread names for example, according to the fineness, the material, the direction of rotation, the Number of revolutions, according to the intended use, according to the appearance or according to special treatment options, the skilled worker also recognizes here that the textile thread-like structure in the form of a game can be used in a variety of ways.
- the object of the invention is also achieved by a textile fabric which has fibers and an electrically conductive insert and in which at least some of the fibers are electrically conductive.
- a textile fabric which has fibers and an electrically conductive insert and in which at least some of the fibers are electrically conductive.
- the latter can be realized, for example, by a felt, which comprises conductive fibers matted to one another and an electrically conductive insert, or by a fleece.
- the term “textile fabric” is understood to mean, for example, knitted fabrics, knitted fabrics, scrims and fabrics.
- knitted fabric and knitted fabric comprise a textile fabric which consists of a knitted fabric.
- a fabric consists of several warp and a plurality of weft threads, which are preferably arranged orthogonally to one another, in contrast to which a fabric is characterized by threads arranged essentially parallel to one another.
- the textile fabric has a textile thread-like structure as described above.
- the textile fabric is given particularly good shielding properties against electrical radiation while the external properties remain the same.
- the object is achieved by a fabric in which at least one weft and / or at least one warp has a textile thread-like structure with the features of the textile thread-like structure described above.
- the fabric can have at least one weft and / or at least one warp made of a thread-like structure according to the invention.
- the fabric corresponding to the fabric can, for example, be a knitted fabric or a knitted fabric.
- the present solution is therefore based on the knowledge that good shielding ability while maintaining sufficiently advantageous textile properties can be achieved by creating a two-component system consisting of an electrically conductive insert and electrically conductive fibers, the electrically conductive insert for good networking or . ensures good equipotential bonding over long distances, while the electrically conductive fibers bridge the necessary gaps that are inevitably formed in textile structures and maintain the textile properties, although they may have a much poorer conductivity than the conductive insert. The latter is insignificant for the shielding in that the electrically conductive fibers only have to conductively bridge short distances, up to the conductive insert.
- the electrically conductive fibers can also provide an electrical balance between two electrical inserts, in one thread or in different threads, even if the inserts are not in direct contact, in particular if a fiber is in contact with both inserts.
- the electrically conductive fibers thus make statistical contact with the electrically conductive insert and thus increase their possibility of contact to form a shield and the interaction radius of the overall structure with an electromagnetic field.
- Such fabrics or fabrics can preferably be used where, for example, electrostatic or electrodynamic fields are to be shielded or even to be diverted. They can be used, for example, to build Faraday cages or shielded and grounded areas or rooms.
- a thin fabric or knitted fabric from the textile thread-like structure according to the invention can be incorporated into a wallpaper.
- At least one weft and / or at least one warp has an intermediate thread made of natural fibers and / or synthetic fibers.
- natural and synthetic fibers have already been explained in more detail in the text, so that a further description of this can be dispensed with here.
- the efficiency of an electromagnetic shielding attenuation of textiles or fabrics depends on Requirements can be modulated differently. This allows the fabric to be individually designed in terms of its shielding properties, so that, for example, an item of clothing or partial areas of an item of clothing can be produced for different areas of use.
- the intermediate thread has an electrically conductive wire, in particular in order to avoid potential differences which extend longer, for example over several stitches.
- An electrically conductive wire introduced into the intermediate thread roughly corresponds to the electrically conductive insert already described and is preferably a metal wire which is designed as a monofilament.
- a wire made of multifilaments can also be used in the present context or as an electrically conductive insert.
- the intermediate thread is to be particularly flexible, it is possible for the intermediate thread to have at least partially electrically conductive fibers instead of an electrically conductive wire. As a result, the intermediate thread still has good short-range electrically conductive properties, which means that the fabric overall, in combination with the electrically conductive insert of the threads according to the invention, has good protection against electrical radiation or fields.
- a preferred embodiment variant provides that at least approximately parallel intermediate threads are arranged at a distance of more than 1 mm, preferably more than 2 mm, and that at least one textile thread-like structure according to the invention is arranged between these intermediate threads.
- the object of the invention is achieved by a gauze or a fabric with weft and warp threads, wherein at least one weft thread and / or at least one warp thread has an electrically conductive insert which is arranged oscillating within the thread and at least partially the surface of the Fadens reached or forms.
- the threads according to the invention have, due to the oscillating arrangement of the electrical insert and / or the electrically conductive fibers, significantly higher irregularities in terms of conductivity, which considerably increase the cross-section of the interaction of a thread according to the invention or a textile product according to the invention, even with high-frequency fields, and in this way lead to the good shielding properties described. Nevertheless, the textile properties can be retained, since relatively thin electrically conductive inserts or electrically conductive fibers with good textile properties, which generally do not conduct as well, can be used with high shielding results.
- the term “oscillate” is to be understood to mean that the electrically conductive insert is incorporated into the thread while moving. This means that the electrically conductive insert does not necessarily oscillate with a uniform amplitude about a central axis. Rather, the electrically conductive insert migrates essentially back and forth irregularly within the thread and accordingly also reaches the surface of the thread predominantly irregularly.
- the gauze or fabric has a high shield against electrical radiation if the number of weft threads with an electrically conductive insert is less than 40 threads per cm, preferably less than 30 threads per cm.
- a preferred embodiment variant provides for a number of 25 or fewer weft threads with an electrically conductive insert.
- the number of warp threads with an electrically conductive insert cumulatively or alternatively a value of less than 40 threads per cm, preferably less than 30 threads per cm.
- a sufficiently large shield against electrical radiation is achieved with only 25 or fewer warp threads that have a conductive insert.
- a gauze or a fabric which has both weft threads with an electrically conductive insert oscillating in accordance with the invention and warp threads with an electrically conductive insert oscillating in accordance with the invention are particularly well suited for achieving a high shielding performance, since this enables equipotential bonding to be achieved across the entire gauze or fabric.
- a fabric with a small number of weft and warp threads with an electrically conductive insert is suitable for the production of entire items of clothing, whereas areas such as pockets, in particular areas of a garment area (pocket) facing the body, with a higher density of weft and warp threads are suitable for comprise an electrically conductive insert, can be equipped.
- a further embodiment variant provides that at least two electrically conductive inserts of two, preferably adjacent, weft and / or warp threads running approximately parallel to one another are spaced apart by more than 0.1 mm, preferably by more than 0.3 mm. Even if two electrically conductive inserts, which run approximately parallel to each other, are 0.4 mm apart in both the weft and warp directions, an attenuation of electromagnetic radiation of almost 50 dB is achieved, so that this results in a particularly strong relief for a body, even if it is exposed to particularly strong radiation. Even if the distance between the electrically conductive inserts described above is more than 1 mm or more than 1.5 mm, a body exposed to this radiation can be considerably relieved in the event of a lower radiation exposure.
- the gauze or fabric preferably has a screen attenuation of more than 5 dB, preferably more than 10 dB. It goes without saying that a gauze or a fabric with such a screen attenuation is also inventive independently of the other features of the invention, since a body is considerably relieved even with attenuation of approximately 5 dB.
- the values relating to the “shielding attenuation” are determined, for example, with the aid of a strongly insulated measuring chamber.
- the measuring chamber is completely closed except for one opening and the space of the measuring chamber is isolated from the surroundings.
- the opening is also closed by a stretched piece of tissue.
- Located for the measurement In the measuring chamber there is a receiver that is receptive to electromagnetic radiation.
- an emitter for electromagnetic waves is positioned at a distance in front of the opening outside the measuring chamber in such a way that the receiver and the emitter are arranged opposite one another The emitter now emits an electromagnetic radiation of a certain intensity, which essentially only penetrates the substance sample positioned in front of the opening of the measuring chamber and is received by the receiver.
- electrically poorly conductive intermediate thread means a thread which has at least a lower electrically conductive property than a weft. or warp thread with an electrically conductive insert.
- An intermediate thread with poor electrical conductivity can be made from natural fibers and / or synthetic fibers.
- the intermediate thread which is also poorly conductive, can also have an electrically conductive wire. This does not conflict with the weft or warp threads already described here with an electrically conductive insert, as long as the intermediate thread is less electrically conductive.
- the interaction cross section of the threads with respect to radiation can be varied as well as with the intermediate threads spaced apart from each other and described above, which at least one textile thread-like structure according to the invention is arranged between them ,
- the object of the invention is further achieved by an item of clothing, at least one area of the item of clothing having a previously described fabric or fabric. It is advantageous here if at least the areas of the item of clothing are equipped with the fabric according to the invention which are exposed to increased radiation exposure to electromagnetic radiation. For example, these are inner pockets of an item of clothing which are provided for the temporary storage of a mobile radio telephone. On the other hand, this can also be the top of such a piece of clothing if the radiation is expected from above, as is the case, for example, with flying personnel.
- the invention teaches a building material in which at least one area of the building material has a fabric or sheet material according to the invention.
- building material is understood here to mean almost all materials that are used in any form to provide an object, a created component or building.
- areas of a curtain or wallpaper can be equipped with the fabric according to the invention, so that these objects at least in the Area of the fabric have a shield against electromagnetic radiation.
- Another use provides for the previously described textile thread-like structures in the form of a textile thread or yarn as well as a woven or knitted fabric on or in heat or. Incorporate sound insulation panels. Wallpaper or insulation panels made in this way can also be connected to ground lines, for example.
- the textile thread-like structure according to the invention or the flat structure according to the invention in such a way that the conductivity of the fabric or the shielding against electrostatic and electrodynamic fields is selected depending on the expected radiation exposure.
- a region of a jeans pocket facing a body has the textile thread-like fabric according to the invention.
- Another possibility is to equip a shoulder area of a garment for flight personnel with the fabric according to the invention, since flight personnel in particular are exposed, among other things, to a relatively high level of electromagnetic radiation from the upper area of an aircraft.
- FIG. 1 a textile thread-like structure
- FIG. 2 shows a first fabric made from a large number of textile thread-like structures
- FIG. 3 shows a second fabric
- FIG. 4 shows a third fabric
- FIG. 5 shows a fourth fabric
- FIG. 6 schematically shows a measuring arrangement for determining a screen attenuation of a textile sample
- FIG. 7 schematically shows a course of shielding attenuation of a first textile sample against electromagnetic radiation as a function of its frequency range
- FIG. 8 schematically shows a course of shielding attenuation of a second textile sample against electromagnetic radiation as a function of its frequency range
- FIG. 9 schematically shows a course of shielding attenuation of a further textile sample against electromagnetic radiation as a function of its frequency range.
- the textile thread-like structure 1 has an electrically conductive insert 2, a large number of electrically conductive fibers 3 and a large number of non-conductive fibers 4.
- the electrically conductive insert 2 is spun together with the fibers 3, 4, so that it statistically oscillates in the thread formed thereby.
- the electrically conductive insert 2 reaches the surface of the textile thread-like structure 1 in areas 6, 7, 8 and 9.
- the electrically conductive fibers 3 are mixed with non-conductive fibers 4 (shown thinner) and together with the electrically conductive insert 2 arranged into a thread.
- the electrically conductive fibers 3 bring about a generally better general conductivity of the textile thread-like structure 1, the electrically conductive fibers 3 in particular also having a direct change with the electrically conductive insert 2.
- the electrically conductive fibers can ensure good shielding in the vicinity, while the actual long-range shielding is formed by the conductive insert 2 and its contact with itself or with other conductive bodies if this structure is processed accordingly.
- Natural fibers such as cotton or animal fibers are particularly suitable as non-conductive fibers. Chemical fibers can also be used.
- the conductive fibers can be provided in particular by carbonized plastic fibers or by fibers made of conductive plastics. In contrast to metallic fibers, these affect the overall texture of the corresponding thread only insignificantly.
- natural fibers made conductive for example coated natural fibers, can also be used.
- the electrically conductive textile thread-like structures 1 can be further processed as a weft and / or as a warp to form a woven fabric, as shown by way of example in FIGS. 2 to 5.
- the fabric 12 (see FIG. 2), in which both the warp 11 and the weft 10 are designed according to the invention, is particularly well suited for shielding against an electrostatic or an electrodynamic field.
- the fabric 12 of a pocket facing a body in particular a jeans pocket, is made of such a fabric 12, so that the Body is better protected against the electromagnetic radiation of a mobile phone by the shielding effect of the fabric 12, for example.
- a further possibility for fabric design provides that, in the case of a fabric 16, only every second weft 17, 18, 19 and 20 is designed as a textile thread-like structure 1 with electrically conductive fibers 3, 4, the chain 21 being formed entirely from threads according to the invention.
- every third warp 23, 24, 25 and every third weft 26, 27, 28 is made from a textile thread-like structure 1 which has conductive fibers 3, 4. This also provides adequate shielding against electromagnetic radiation, the fabric 22 still having good mechanical properties due to the many conventional chains 29, 30, 31, 32 and wefts 33, 34, 35, 36.
- the measuring arrangement 37 shown in FIG. 6 comprises a shielding attenuation measuring chamber 38, a so-called network analyzer 39, a transmitting antenna 40 and a receiving antenna 41. Both the transmitting antenna 40 and the receiving antenna 41 are connected to the network analyzer 39, so that on the one hand values for transmission signals 42 and secondly, values for received signals 43 can be compared with one another by means of the network analyzer 39.
- the shielding attenuation measuring chamber 38 has on its side facing the transmitting antenna 40 an opening approximately 0.4 m ⁇ 0.4 m in front of which a fabric sample 45 is attached.
- the fabric sample 45 is brought into flat contact with the metal wall 46 of the shielding attenuation measuring chamber 38.
- the transmitting antenna 40 is located outside the shielding attenuation measuring chamber 38 and is arranged approximately 170 cm from the material sample 45.
- the receiving antenna 41 is arranged within the shielding attenuation measuring chamber 38 at a distance of approximately 30 cm from the material sample 45.
- the shielding attenuation measuring chamber 38 is insulated with an insulating material 47 such that the receiving antenna 41 arranged in the shielding attenuation measuring chamber 38 essentially registers only electromagnetic radiation 43 that passes through the opening 44.
- a log-periodic antenna was used as the transmitting and receiving antenna 40 and 41, respectively. Both the distance between the transmitting antenna 40 and the fabric sample 45 and the distance between the receiving antenna 41 and the fabric sample 45 correspond to the IEEE standard 299 / MIL standard 285.
- the two antennas 40 and 41 are aligned so that the polarization direction is opposite the shielding tion measuring chamber 38 extends essentially horizontally. In this exemplary embodiment, this means that the direction of polarization is orthogonal to the paper planes.
- the measurement arrangement 37 was calibrated before the actual measurements were carried out.
- an aluminum plate (not shown here) was arranged in front of the opening 44.
- the aluminum plate serves as a sample with which the measuring limits of the entire measuring arrangement 37 were determined.
- the measurement dynamics found here showed an electromagnetic shielding attenuation of over 50 dB in the entire frequency range.
- the frequency range in which both the calibration measurement and the sample measurements were carried out is in a frequency range from approx. 800 MHz to 3 GHz.
- the network analyzer 39 it is the HP 8753C / HP85046A series.
- the manufacturer of the transmitting antenna 40 is the R & S company and the series of the transmitting antenna 40 is called HL 025671.5317.02.
- the manufacturer of the receiving antenna 41 is the company Schwarzbeck and the receiving antenna 41 has the designation USLP 9143.
- the actual test series comprises a total of three fabric samples 45.
- Each fabric sample 45 was arranged on or in front of the opening 44 of the shielding measurement chamber 38 in such a way that the production direction of the fabric sample 45 essentially coincided with the polarization direction of the electromagnetic waves and the production direction of the sample 45 were oriented perpendicular to the direction of polarization of the electromagnetic waves.
- the fabric sample 45 was only rotated by 90 °.
- production direction means the direction in which the warp threads of a fabric are aligned.
- FIGS. 7 to 9 the results for the different fabric samples 45 are each shown in a graph 48 (FIG. 7), 49 (FIG. 8), 50 (FIG. 9).
- the shielding attenuation is plotted in dB over a frequency range from 800 MHz to 3 GHz.
- Each of the graphics 48, 49 and 50 comprises two measurement curves 48A, 48B, 49A, 49B and 50A, 50B.
- curves 48B, 49B and 50B marked B the production direction of the respective material samples 45 lies in the polarization direction of the electromagnetic waves. Accordingly, the direction of production of the fabric samples 45 in the case of the measurement curves 48A, 49A and 50A marked with A is oriented perpendicular to the direction of polarization of the electromagnetic waves.
- FIG. 7 shows the measurement result of the screen attenuation of a fabric which has a number of 25 threads per cm both in the warp and in the weft direction. Each thread has an electrically conductive insert, so that there is a grid spacing of approximately 0.4 mm with respect to the electrically conductive inserts of the individual threads.
- FIG. 8 shows the measurement curves 49A and 49B of a second material sample.
- This comprises a much smaller number of weft or warp threads with an electrically conductive insert. Only every second warp or weft thread has such an electrically conductive insert. Accordingly, the grid spacing between the individual electrically conductive inserts is approximately 2 mm. This results in a maximum shielding attenuation of almost 45 dB. However, this maximum value is only reached in the range around 800 MHz. From a frequency range of approximately 1.6 GHz, the value of the shielding attenuation is below 35 dB.
- the distance between the two measurement curves 49A and 49B from one another is a little smaller than in the two measurement curves 48A and 48B described above. This is obviously related to the fact that this fabric sample achieves better shielding attenuation values when the fabric sample is aligned with the direction of polarization of the electromagnetic wave.
- the third textile sample has a maximum attenuation of only 35 dB in the frequency range around 800 MHz.
- the number of weft or warp threads that have an electrically conductive insert has been reduced further, so that the values of the attenuation shield decrease further accordingly.
- the directions of the two measurement curves 50A and 50B in the frequency interval 800 MHz to approximately 2.6 GHz largely correspond to the polarization direction of the electromagnetic wave, so that the orientation of the polarization direction with respect to the production direction or vice versa is of less importance here.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10294892T DE10294892D2 (de) | 2001-10-15 | 2002-10-15 | Textiles fadenartiges Gewebe, textiles Flächengebilde, Gewebe bzw. Gaze, Bekleidungsstück sowie Baumaterial |
AU2002347080A AU2002347080A1 (en) | 2001-10-15 | 2002-10-15 | Textile thread-like woven, textile construction, woven or gauze, garment and building material |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10150206 | 2001-10-15 | ||
DE10150206.0 | 2001-10-15 | ||
DE10206326.5 | 2002-02-14 | ||
DE10206326A DE10206326A1 (de) | 2001-10-15 | 2002-02-14 | Textiles fadenartiges Gewebe, textiles Flächengebilde aus Fasern, Gewebe aus textilen fadenartigen Gebilden, Bekleidungsstück sowie Baumaterial |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2003035951A2 true WO2003035951A2 (de) | 2003-05-01 |
WO2003035951A3 WO2003035951A3 (de) | 2003-07-10 |
WO2003035951A8 WO2003035951A8 (de) | 2003-08-21 |
Family
ID=26010350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/003885 WO2003035951A2 (de) | 2001-10-15 | 2002-10-15 | Textiles fadenartiges gewebe, textiles flächengebilde, gewebe bzw. gaze, bekleidungsstück sowie baumaterial |
Country Status (2)
Country | Link |
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DE (1) | DE10294892D2 (de) |
WO (1) | WO2003035951A2 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10343127A1 (de) * | 2003-09-18 | 2005-05-12 | Julius Boos Jun Gmbh & Co Kg | Gewirk zur Abschirmung elektromagnetischer Strahlung |
EP2233620A3 (de) * | 2009-03-23 | 2013-11-27 | Politechnika Lodzka | Abschirmungsgewebe gegen elektromagnetische Strahlung |
WO2017111687A1 (en) | 2015-12-22 | 2017-06-29 | Inuheat Group Ab | Electrically conductive yarn and a product including the yarn |
DE202021106822U1 (de) | 2021-12-15 | 2022-01-10 | Certoplast Technische Klebebänder Gmbh | Elektromagnetisch abschirmendes Kabelwickelband |
DE102021121290A1 (de) | 2021-08-17 | 2023-02-23 | Schaeffler Technologies AG & Co. KG | Wälzlageranordnung |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3986530A (en) * | 1974-07-02 | 1976-10-19 | Kuraray Co., Ltd. | Cloth having antistatic properties |
US4590122A (en) * | 1980-12-18 | 1986-05-20 | Fiberite Corporation | High conductivity graphite material with electrically conductive filaments wrapped around warp and fill elements |
US5617713A (en) * | 1988-06-13 | 1997-04-08 | Nsp Sicherheits-Produkte Gmbh | Yarn having metallic fibers and an electromagnetic shield fabric made therefrom |
-
2002
- 2002-10-15 DE DE10294892T patent/DE10294892D2/de not_active Expired - Fee Related
- 2002-10-15 WO PCT/DE2002/003885 patent/WO2003035951A2/de not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3986530A (en) * | 1974-07-02 | 1976-10-19 | Kuraray Co., Ltd. | Cloth having antistatic properties |
US4590122A (en) * | 1980-12-18 | 1986-05-20 | Fiberite Corporation | High conductivity graphite material with electrically conductive filaments wrapped around warp and fill elements |
US5617713A (en) * | 1988-06-13 | 1997-04-08 | Nsp Sicherheits-Produkte Gmbh | Yarn having metallic fibers and an electromagnetic shield fabric made therefrom |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10343127A1 (de) * | 2003-09-18 | 2005-05-12 | Julius Boos Jun Gmbh & Co Kg | Gewirk zur Abschirmung elektromagnetischer Strahlung |
DE10343127B4 (de) * | 2003-09-18 | 2009-02-12 | Julius Boos Jun. Gmbh & Co. Kg | Gewirk zur Abschirmung elektromagnetischer Strahlung |
EP2233620A3 (de) * | 2009-03-23 | 2013-11-27 | Politechnika Lodzka | Abschirmungsgewebe gegen elektromagnetische Strahlung |
WO2017111687A1 (en) | 2015-12-22 | 2017-06-29 | Inuheat Group Ab | Electrically conductive yarn and a product including the yarn |
US10829870B2 (en) | 2015-12-22 | 2020-11-10 | Inuheat Group Ab | Electrically conductive yarn and a product including the yarn |
DE102021121290A1 (de) | 2021-08-17 | 2023-02-23 | Schaeffler Technologies AG & Co. KG | Wälzlageranordnung |
DE202021106822U1 (de) | 2021-12-15 | 2022-01-10 | Certoplast Technische Klebebänder Gmbh | Elektromagnetisch abschirmendes Kabelwickelband |
Also Published As
Publication number | Publication date |
---|---|
WO2003035951A3 (de) | 2003-07-10 |
DE10294892D2 (de) | 2004-12-09 |
WO2003035951A8 (de) | 2003-08-21 |
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