WO2023074771A1 - 導電性不織布、シールドテープ、及び、ワイヤハーネス - Google Patents
導電性不織布、シールドテープ、及び、ワイヤハーネス Download PDFInfo
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- WO2023074771A1 WO2023074771A1 PCT/JP2022/040040 JP2022040040W WO2023074771A1 WO 2023074771 A1 WO2023074771 A1 WO 2023074771A1 JP 2022040040 W JP2022040040 W JP 2022040040W WO 2023074771 A1 WO2023074771 A1 WO 2023074771A1
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- nonwoven fabric
- conductive
- conductive nonwoven
- layer
- wire harness
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 138
- 239000010410 layer Substances 0.000 claims abstract description 62
- 239000002344 surface layer Substances 0.000 claims abstract description 37
- 239000000835 fiber Substances 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 239000012790 adhesive layer Substances 0.000 claims abstract description 9
- 238000007747 plating Methods 0.000 abstract description 10
- 230000000052 comparative effect Effects 0.000 description 36
- 239000004020 conductor Substances 0.000 description 23
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 15
- 229910002092 carbon dioxide Inorganic materials 0.000 description 9
- 239000001569 carbon dioxide Substances 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 description 9
- 239000005020 polyethylene terephthalate Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
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- 125000002524 organometallic group Chemical group 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007772 electroless plating Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- -1 polyethylene terephthalate Polymers 0.000 description 4
- 229920002799 BoPET Polymers 0.000 description 3
- 238000000635 electron micrograph Methods 0.000 description 3
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
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- 239000011889 copper foil Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 229920001230 polyarylate Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
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Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
- D06M23/10—Processes in which the treating agent is dissolved or dispersed in organic solvents; Processes for the recovery of organic solvents thereof
- D06M23/105—Processes in which the solvent is in a supercritical state
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0045—Cable-harnesses
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
- H01B17/64—Insulating bodies with conductive admixtures, inserts or layers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
-
- 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 present invention relates to conductive nonwoven fabrics, shield tapes, and wire harnesses.
- a cable has been proposed in which a conductive non-woven fabric having a non-woven fabric and a metal layer formed on the surface of the non-woven fabric is arranged around the electric wire (see Patent Document 1, for example).
- This cable exhibits an electromagnetic shielding effect due to the metal layer of the conductive nonwoven fabric, and can be easily bent because the nonwoven fabric is excellent in stretching and compression.
- the conductive non-woven fabric used in the cable described in Patent Document 1 has insufficient shielding performance because the metal layer is formed only on the surface of the non-woven fabric, and it is positioned as an auxiliary shielding member. . Therefore, in the cable described in Patent Document 1, it is necessary to provide an outer conductor layer in addition to the conductive nonwoven fabric, resulting in a complicated cable structure.
- One of the objects of the present invention is to provide a conductive nonwoven fabric, a shielding tape, and a wire harness that are capable of improving shielding performance and suppressing complication of the cable structure.
- the conductive nonwoven fabric is a conductive nonwoven fabric comprising a nonwoven fabric and a plated portion made of a conductive metal covering fibers constituting the nonwoven fabric,
- the value obtained by dividing the electrical resistance value in the intermediate layer, which is the intermediate position in the thickness direction of the conductive nonwoven fabric, by the electrical resistance value in the surface layer of the conductive nonwoven fabric is 4.0 or less.
- the shield tape includes the conductive nonwoven fabric described above and an adhesive layer arranged so as to be laminated on the conductive nonwoven fabric.
- a wire harness includes an electric wire and the above shield tape provided around the electric wire.
- FIG. 1 is a perspective view showing a wire harness according to an embodiment of the invention.
- 2A is a cross-sectional view of the shield tape when the shield tape is cut along a plane along the axial direction of the wire harness of FIG. 1.
- FIG. 2B is an enlarged view of part A in FIG. 2A.
- FIG. 2C is an enlarged view of part B in FIG. 2B.
- FIG. 3 is an electron micrograph showing a cross section corresponding to FIG. 2A of the conductive nonwoven fabric of the shield tape.
- FIG. 4 is an enlarged view of the portion corresponding to the intermediate layer of the conductive nonwoven fabric in the electron micrograph shown in FIG.
- FIG. 5 is a schematic diagram for explaining a plating pretreatment method applied to a conductive nonwoven fabric.
- FIG. 6 is a table showing formation states of plated portions in Examples 1 and 2 and Comparative Examples 1-4.
- FIG. 7 is a diagram showing evaluation methods of Examples 1 and 2 and Comparative Examples 1-4.
- 8 is a graph showing the flex resistance of Example 1 and Comparative Examples 5 and 6.
- FIG. 9 is a graph showing the shielding performance of Example 1 and Comparative Examples 5 and 7.
- FIG. 7 is a diagram showing evaluation methods of Examples 1 and 2 and Comparative Examples 1-4.
- FIG. 8 is a graph showing the flex resistance of Example 1 and Comparative Examples 5 and 6.
- FIG. 9 is a graph showing the shielding performance of Example 1 and Comparative Examples 5 and 7.
- FIG. 1 is a perspective view showing a wire harness 1 according to an embodiment of the invention.
- a wire harness 1 according to this embodiment includes electric wires W, a corrugated tube 50 , and a shield tape 10 attached to the inner wall surface of the corrugated tube 50 .
- the wire harness 1 may be provided with another tube material instead of the corrugated tube 50, or may be provided with a tape wound around the corrugated tube 50 or another tube material.
- the electric wire W includes a conductor made of, for example, copper, aluminum, or an alloy thereof, and an insulating coating that coats the conductor.
- the conductor of the electric wire W is composed of a single strand.
- the conductor of the electric wire W may be a twisted wire obtained by twisting a plurality of strands.
- the wire harness 1 may include a plurality of electric wires W. As shown in FIG.
- the corrugated tube 50 is a cylindrical member formed with a bellows portion in which irregularities are alternately continuous in the longitudinal direction.
- the corrugated tube 50 is made of resin.
- the corrugated tube 50 is arranged so as to cover the electric wire W. As shown in FIG.
- the shield tape 10 has a conductive nonwoven fabric 11 as a shield layer that exhibits a shielding function against external noise and the like.
- 2A is a cross-sectional view of the shield tape 10 when the shield tape 10 is cut along a plane along the axial direction of the wire harness 1 shown in FIG. 1, and FIG. 2B is an enlarged view of the A portion in FIG. 2A.
- 2C is an enlarged view of the B part in FIG. 2B.
- the shield tape 10 includes a conductive nonwoven fabric 11 and an adhesive layer 12 disposed so as to be laminated on the conductive nonwoven fabric 11 (that is, on the front surface or the back surface of the conductive nonwoven fabric 11). and have.
- the shield tape 10 is attached to the inner wall surface of the corrugated tube 50 via the adhesive layer 12 and provided so as to surround the wire W, as shown in FIG.
- the conductive nonwoven fabric 11 includes a nonwoven fabric 11a and a plated portion 11b, as shown in FIG. 2B.
- the nonwoven fabric 11a is a sheet-shaped member in which fibers are entangled without being woven, and has a predetermined thickness. As shown in FIG. 2B, the nonwoven fabric 11a has a structure in which fibers F constituting the nonwoven fabric 11a are arranged in a number of layers in the thickness direction due to manufacturing characteristics.
- the nonwoven fabric 11a is made of, for example, polyethylene terephthalate (PET), polypropylene, nylon, fibers made of resin such as acrylic, glass fibers, carbon fibers, aramid fibers, polyarylate fibers, and the like.
- the plated portion 11b is a conductive metal that covers the fibers F that constitute the nonwoven fabric 11a.
- the plated portion 11b is made of, for example, copper, nickel, tin, silver, or an alloy of these metals.
- the plated portion 11b may be formed in a single layer so as to cover the fibers F forming the nonwoven fabric 11a, or may be formed in multiple layers.
- the plating portion 11b is provided with a first layer made of copper so as to cover the fibers F constituting the nonwoven fabric 11a, and a second layer made of tin so as to cover the first layer. It may have a layered structure.
- FIG. 3 is an electron micrograph showing a cross section of the conductive nonwoven fabric 11 in which the plated portion 11b is formed on the resin fiber F, and FIG. It is the figure which expanded the part corresponding to.
- the fibers F forming the nonwoven fabric 11a are arranged in multiple layers in the thickness direction of the nonwoven fabric 11a.
- the plated portion 11b is formed not only on the surface layer S (see FIG. 3) but also on the intermediate layer M (see FIGS. 3 and 4), which is the intermediate position MP in the thickness direction. It is In FIG. 4, due to the insulating properties of the resin fiber F, the cross section of the fiber F is observed as a black dot on the electron microscope image. On the other hand, portions other than the cross section of the fiber F are observed to be fibrous. From this, it can be said that in the intermediate layer M of the conductive nonwoven fabric 11, the plated portions 11b are appropriately formed on the fibers F.
- the value obtained by dividing the electrical resistance value Rm in the intermediate layer M of the conductive nonwoven fabric 11 by the electrical resistance value Rs in the surface layer S (strictly speaking, the surface) of the conductive nonwoven fabric 11 is 4.0 or less.
- the plated portion 11b is formed up to the intermediate layer M. Therefore, the surface layer S on one side and the surface layer S on the opposite side can be electrically connected through the intermediate layer M.
- the thickness of the conductive nonwoven fabric 11 is preferably 50 ⁇ m or more and 2.0 mm or less.
- the fibers F constituting the nonwoven fabric 11a are arranged in multiple layers in the thickness direction, so the plated portions 11b are also arranged in multiple layers in the thickness direction.
- the conductive nonwoven fabric 11 can exhibit higher shielding performance than a single layer such as metal foil.
- the thickness of the conductive nonwoven fabric 11 is less than 50 ⁇ m, the number (layers) of the fibers F overlapping in the thickness direction is small, which may make it difficult to exhibit sufficient shielding performance.
- the thickness exceeds 2 mm, there is concern that the process of forming the plated portion 11b in the intermediate layer M (see FIG. 3) will take a long time, thus increasing the manufacturing burden.
- FIG. 5 is a schematic diagram for explaining the plating pretreatment method according to this embodiment.
- the nonwoven fabric 11a is prepared.
- the non-woven fabric 11a prepared here is made of polyethylene terephthalate, polypropylene, nylon, fibers made of resin such as acrylic, glass fibers, carbon fibers, aramid fibers, polyarylate fibers, and the like. be.
- the nonwoven fabric 11a is treated with a supercritical fluid (for example, carbon dioxide).
- a supercritical fluid for example, carbon dioxide
- an organometallic complex 30 soluble in a supercritical fluid for example, palladium or nickel soluble in carbon dioxide in a supercritical state
- the nonwoven fabric 11a is accommodated in the housing 40 in a state of being wound, for example, two times around a cylindrical bobbin.
- carbon dioxide in a supercritical state is supplied to the housing 40 in this embodiment.
- the pressure is 12 MPa or more and 15 MPa or less
- the temperature is 100° C. or more and 130° C. or less
- the time is 10 minutes or more and 60 minutes or less.
- the circulation flow rate during treatment is 0.5 kg/min or more and 8 kg/min or less.
- the organometallic complex 30 is dissolved in supercritical carbon dioxide and reduced, and the organometallic complex 30 is decomposed not only in the surface layer S (see FIG. 3) of the nonwoven fabric 11a but also in the intermediate layer M (see FIG. 4).
- the metal produced by the process is deposited.
- the circulation flow rate during treatment is 0.5 kg / min or more and 8 kg / min or less, so that the supercritical carbon dioxide reaches the intermediate layer M of the nonwoven fabric 11 a and the intermediate layer M is sufficiently A metal will deposit.
- Supercritical carbon dioxide is excellent in solubility and diffusibility, and tends to deposit the metal evenly and substantially uniformly up to the intermediate layer M of the nonwoven fabric 11a.
- the nonwoven fabric 11a is taken out from the housing 40 after a predetermined time has passed (for example, after 30 minutes have passed). Further, for example, heat treatment is performed at 150° C. or higher (250° C. or higher depending on the heat resistance of the fibers F forming the nonwoven fabric 11a) for 60 minutes or longer. This heat treatment removes the residual components of the supercritical fluid on the fibers F and activates the metal deposited on the fibers F.
- the nonwoven fabric 11a has a catalyst metal deposited up to the intermediate layer M. As shown in FIG. Therefore, the plated portion 11b is also formed in the intermediate layer M of the nonwoven fabric 11a by electroless plating.
- the conductive nonwoven fabric 11 whose value obtained by dividing the electrical resistance value Rm of the intermediate layer M by the electrical resistance value Rs of the surface layer S is 4.0 or less is obtained.
- FIG. 6 is a table showing the formation state of plated portions in Examples 1 and 2 and Comparative Examples 1 to 4, and FIG. 7 is a diagram showing evaluation methods for Examples 1 and 2 and Comparative Examples 1 to 4. .
- the conductive nonwoven fabrics according to Examples 1 and 2 and Comparative Examples 1 and 2 were produced by subjecting the PET nonwoven fabric to the above-described supercritical treatment.
- the supercritical treatment palladium hexafluoroacetylacetonate was used as an organometallic complex, and carbon dioxide in a supercritical state was supplied.
- the temperature was 100° C.
- the pressure was 12 MPa
- the time was 30 minutes.
- copper plating was applied by electroless plating.
- the circulation flow rate was set to 3.8 kg/min, and the thickness of the nonwoven fabric was set to about 1 mm.
- a PET nonwoven fabric plated with copper by a so-called sputtering method manufactured by Sekisui Nanocoat Technology Co., Ltd.
- the thickness of the nonwoven fabric is about 3 mm.
- the surface electrical resistance value (hereinafter referred to as "surface resistance") of the surface layer of the slice 1 was 0.874 ⁇ /m, and the surface resistance of the inner layer was 0.375 ⁇ /m. was m.
- the surface resistance in the surface layer of slice 2 was 0.056 ⁇ /m, and the surface resistance in the inner layer was 0.088 ⁇ /m.
- the thickness of the slice 1 was measured at four predetermined locations on the slice 1, the average value of the thicknesses at these four locations (hereinafter referred to as the "four-location average”) was 0.60 mm, and the thickness of the slice 2 was 0.60 mm.
- the average of 4 points was 0.70 mm.
- Example 1 the value obtained by dividing the surface resistance of the intermediate layer by the surface resistance of the surface layer was about 0.43 for slice 1 and about 1.57 for slice 2.
- Example 2 the surface resistance of the surface layer of slice 1 was 0.196 ⁇ /m, and the surface resistance of the inner layer was 0.615 ⁇ /m.
- the surface resistance of slice 2 was 0.260 ⁇ /m in the surface layer, and the surface resistance in the inner layer was 0.168 ⁇ /m.
- the four-point average thickness of slice 1 was 0.84 mm, and the four-point average thickness of slice 2 was 0.65 mm.
- Example 2 the value obtained by dividing the surface resistance of the intermediate layer by the surface resistance of the surface layer was about 3.14 for slice 1 and about 0.64 for slice 2.
- the surface resistance of the surface layer of slice 1 was 0.2207 ⁇ / m, and the surface resistance of the inner layer could not be measured because the inner layer was not plated (that is, a very large value.
- the surface of PET The resistance was 10 15 ⁇ /m or more).
- the surface resistance of the surface layer of slice 2 was 0.1892 ⁇ /m, and the surface resistance of the inner layer was unmeasurable (ie, extremely large value).
- the average thickness of slice 1 was 1.39 mm at four locations, and the average thickness of slice 2 was 1.56 mm at four locations.
- Comparative Example 1 the value obtained by dividing the surface resistance of the intermediate layer by the surface resistance of the surface layer was found to be extremely large.
- the surface resistance of the surface layer of slice 1 was 0.1303 ⁇ /m, and the surface resistance of the inner layer was unmeasurable (that is, extremely large value) because no plating was formed on the inner layer.
- the surface resistance of the surface layer of slice 2 was 0.215 ⁇ /m, and the surface resistance of the inner layer was unmeasurable (ie, a very large value).
- the average thickness of slice 1 was 1.62 mm at four locations, and the average thickness of slice 2 was 1.47 mm at four locations.
- the surface resistance of the surface layer of slice 1 was 6.39 k ⁇ /m, and the surface resistance of the inner layer was unmeasurable (that is, extremely large value) because no plating was formed on the inner layer.
- the surface resistance of the surface layer of slice 2 was 297.7 k ⁇ /m, and the surface resistance of the inner layer was unmeasurable (ie, extremely large value).
- the average thickness of slice 1 was 1.6 mm at four locations, and the average thickness of slice 2 was 1.4 mm at four locations.
- Comparative Example 3 the value obtained by dividing the surface resistance of the intermediate layer by the surface resistance of the surface layer was found to be extremely large.
- the surface resistance of the surface layer of slice 1 was 62.66 ⁇ /m, and the surface resistance of the inner layer was unmeasurable (that is, extremely large value) because the inner layer was not plated.
- the surface resistance of the surface layer of slice 2 was 355.9 k ⁇ /m, and the surface resistance of the inner layer was unmeasurable (ie, a very large value).
- the average thickness of slice 1 was 1.8 mm at four locations, and the average thickness of slice 2 was 1.2 mm at four locations.
- the plated portion is not formed up to the intermediate layer, and the value obtained by dividing the surface resistance of the intermediate layer by the surface resistance of the surface layer is 4.0 or less. never happened.
- the plated portion was formed up to the intermediate layer, and the value obtained by dividing the surface resistance of the intermediate layer by the surface resistance of the surface layer was 4.0 or less. In other words, it was found that the conductive nonwoven fabrics according to Examples 1 and 2 were capable of exhibiting high shielding performance because the plated portion was sufficiently formed up to the intermediate layer.
- FIG. 8 is a graph showing the bending resistance of the conductive nonwoven fabric of Example 1 and the conductors of Comparative Examples 5 and 6.
- the conductive nonwoven fabric of Example 1 was produced by subjecting a PET nonwoven fabric to supercritical treatment as described above (see FIGS. 6 and 7).
- a flat braided tin-plated annealed copper wire manufactured by Meiko Futaba Co., Ltd., trade name: TBC (5.5 sq)
- TBC 5.5 sq
- a copper foil with a thickness of 13 ⁇ m was used. Note that "sq" is substantially the same as "mm 2 ".
- a weight of 100 g was attached to one end of the conductive nonwoven fabric of Example 1 and the conductors of Comparative Examples 5 and 6, and one end was used as the fixed side. Then, at room temperature (for example, 23° C.), the conductive nonwoven fabric and the other end of the conductor are repeatedly bent at a speed of 30 rpm in an angle range of minus 90° to 90° using a mandrel with a bending radius of 1 mm. gone. For each of the conductive nonwoven fabric of Example 1 and the conductors of Comparative Examples 5 and 6, the number of bending reciprocations (number of breaks) until the one end side and the other end side of each were completely separated was measured.
- the conductive nonwoven fabric of Example 1 did not break even after being bent 200,000 times.
- the conductor of Comparative Example 5 broke after 1588 flexings.
- the conductor of Comparative Example 6 broke after flexing 543 times. Therefore, it was found that the conductive nonwoven fabric of Example 1 is excellent in flexibility (followability to electric wire bending).
- FIG. 9 is a graph showing the shielding performance of the conductive nonwoven fabric of Example 1 and the conductors of Comparative Examples 5 and 7.
- the conductive nonwoven fabric of Example 1 was produced by subjecting the PET nonwoven fabric to supercritical treatment (see FIGS. 6 and 7).
- the conductor of Comparative Example 5 the flat braided tin-plated annealed copper wire described above was used.
- the conductor resistance value of the conductive nonwoven fabric of Example 1 was 830 m ⁇ /m
- the conductor resistance value of the flat-knit tin-plated annealed copper wire of Comparative Example 5 was 3.6 m ⁇ /m
- the conductor of the copper PET film of Comparative Example 7 The resistance value was 72 m ⁇ /m.
- the shielding effect of these conductive nonwoven fabrics and conductors was evaluated by the absorption clamp method with the sample length of each sample using these conductive nonwoven fabrics and conductors set to 1 m. Considering the magnitude of the conductor resistance value described above, it was predicted that the shielding effect would be the highest for the flat braided tin-plated annealed copper wire of Comparative Example 5 and the lowest for Example 1. However, actually, as shown in FIG. 9, the conductive nonwoven fabric of Example 1 was superior to the conductors of Comparative Examples 5 and 7 in shielding performance in a high frequency band of 60 MHz or higher.
- the value obtained by dividing the electrical resistance value Rm in the intermediate layer M of the conductive nonwoven fabric 11 according to this embodiment by the electrical resistance value Rs in the surface layer S is 4.0 or less. Therefore, the plated portion 11b is formed up to the intermediate position MP in the thickness direction of the conductive nonwoven fabric 11 .
- the surface layer S of the nonwoven fabric 11a and the surface layer S on the opposite side can be electrically connected via the intermediate position MP. Therefore, the conductive nonwoven fabric 11 can exhibit higher shielding performance than the case where the plated portion 11b is formed only on the surface of the nonwoven fabric 11a.
- the conductive nonwoven fabric 11 has excellent shielding performance, for example, when a wire harness is manufactured using electric wires and the conductive nonwoven fabric 11, there is no need to provide a shield layer separate from the conductive nonwoven fabric 11, and the configuration of the wire harness is improved. complication can be avoided. That is, it is possible to provide a wire harness that achieves both high shielding performance and simplification of configuration.
- the value obtained by dividing the electrical resistance value Rm of the intermediate layer M of the conductive nonwoven fabric 11 by the electrical resistance value Rs of the surface layer S is preferably 3.2 or less, more preferably 1.6 or less.
- the thickness of the conductive nonwoven fabric 11 is 50 ⁇ m or more and 2.0 mm or less. Accordingly, since the thickness is 50 ⁇ m or more, the fibers of the conductive nonwoven fabric 11 are arranged in multiple layers in the thickness direction, thereby improving the shielding performance. Since the thickness is 2.0 mm or less, the plated portion 11b is reliably formed up to the intermediate position MP of the conductive nonwoven fabric 11, and a factory with shielding performance can be achieved. Therefore, the conductive nonwoven fabric 11 having excellent shielding performance can be provided.
- the shield tape 10 includes the conductive nonwoven fabric 11 and the adhesive layer 12 , the conductive nonwoven fabric 11 can be easily attached to the electric wire W or the like via the adhesive layer 12 .
- a wire harness 1 includes an electric wire W and a shield tape 10 provided around the electric wire W.
- the shield tape 10 is attached to the inner wall surface of the corrugated tube 50 .
- the shield tape 10 may be attached directly to the electric wire W.
- the present invention is not limited to the above embodiments, and various modifications can be adopted within the scope of the present invention.
- the present invention is not limited to the above-described embodiments, and can be modified, improved, etc. as appropriate.
- the material, shape, size, number, location, etc. of each component in the above-described embodiment are arbitrary and not limited as long as the present invention can be achieved.
- the wire harness 1 includes a corrugated tube 50 in this embodiment.
- the wire harness 1 does not have to include the corrugated tube 50 .
- the shield tape 10 may be directly wound around the electric wire W. When the shield tape 10 is directly attached to the electric wire W, the electric wire W may be sandwiched between the adhesive layers 12 of the two shield tapes 10 .
- the shield tape 10 is attached to the inner wall surface of the corrugated tube 50 in a state in which there is no wrap portion where the shield tapes 10 overlap each other.
- the shield tape 10 may be attached to the inner wall surface of the corrugated tube 50 with the wrap portion still present.
- the supercritical treatment is followed by the heat treatment, followed by the electroless plating treatment.
- the heat treatment may be omitted.
- the heat treatment of the nonwoven fabric 11a is omitted from the viewpoint of hydrolysis and heat resistance. It's for.
- the conductive nonwoven fabric, shield tape, and wire harness of the present invention are capable of both improving shielding performance and suppressing complication of the cable structure.
- the present invention having this effect can be used, for example, as a wire harness mounted on an automobile or the like.
- Wire harness 10 Shield tape 11: Conductive nonwoven fabric 11a: Nonwoven fabric 11b: Plating part 12: Adhesive layer 30: Organometallic complex 40: Housing 50: Corrugated tube F: Fiber M: Intermediate layer MP: Intermediate position S: Surface layer W: Electric wire
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
Description
当該導電性不織布の厚さ方向の中間位置となる中間層での電気抵抗値を、当該導電性不織布の表層における電気抵抗値で除した値が、4.0以下である。
10:シールドテープ
11:導電性不織布
11a:不織布
11b:めっき部
12:粘着層
30:有機金属錯体
40:筐体
50:コルゲートチューブ
F:繊維
M:中間層
MP:中間位置
S:表層
W:電線
Claims (4)
- 不織布と、前記不織布を構成する繊維を被覆する導電性金属から構成されるめっき部と、を備える導電性不織布であって、
当該導電性不織布の厚さ方向の中間位置となる中間層での電気抵抗値を、当該導電性不織布の表層における電気抵抗値で除した値が、4.0以下である、
導電性不織布。 - 請求項1に記載の導電性不織布において、
当該導電性不織布の厚さが50μm以上2.0mm以下である、
導電性不織布。 - 請求項1又は請求項2に記載の導電性不織布と、前記導電性不織布に積層されるように配置される粘着層と、を備える、シールドテープ。
- 電線と、前記電線の周囲に設けられた請求項3に記載のシールドテープと、を備える、ワイヤハーネス。
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JP2023556617A JPWO2023074771A1 (ja) | 2021-11-01 | 2022-10-26 | |
CN202280017772.9A CN116897230A (zh) | 2021-11-01 | 2022-10-26 | 导电性无纺布、屏蔽带和线束 |
DE112022005261.9T DE112022005261T5 (de) | 2021-11-01 | 2022-10-26 | Leitfähiger Vliesstoff, Abschirmband und Kabelbaum |
US18/459,932 US20230411039A1 (en) | 2021-11-01 | 2023-09-01 | Conductive nonwoven fabric, shielding tape, and wire harness |
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JP2021178590 | 2021-11-01 | ||
JP2021-178590 | 2021-11-01 |
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US18/459,932 Continuation US20230411039A1 (en) | 2021-11-01 | 2023-09-01 | Conductive nonwoven fabric, shielding tape, and wire harness |
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Country Status (5)
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US (1) | US20230411039A1 (ja) |
JP (1) | JPWO2023074771A1 (ja) |
CN (1) | CN116897230A (ja) |
DE (1) | DE112022005261T5 (ja) |
WO (1) | WO2023074771A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07166467A (ja) * | 1993-12-17 | 1995-06-27 | Mitsubishi Paper Mills Ltd | めっき不織布の製造方法 |
JP2017509160A (ja) * | 2013-12-20 | 2017-03-30 | ブルスウォン マテリアル カンパニー リミテッド | 電磁波遮蔽及び吸収用不織布または不織布複合材 |
JP2018152296A (ja) * | 2017-03-14 | 2018-09-27 | 住友電装株式会社 | 電磁シールド部材付ワイヤハーネス |
Family Cites Families (2)
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JP2019075375A (ja) | 2017-10-17 | 2019-05-16 | 積水化学工業株式会社 | ケーブル |
JP2021178590A (ja) | 2020-05-14 | 2021-11-18 | Tdk株式会社 | タイヤ取付け位置検出システム、タイヤ及びタイヤ用センサユニット |
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2022
- 2022-10-26 CN CN202280017772.9A patent/CN116897230A/zh active Pending
- 2022-10-26 DE DE112022005261.9T patent/DE112022005261T5/de active Pending
- 2022-10-26 JP JP2023556617A patent/JPWO2023074771A1/ja active Pending
- 2022-10-26 WO PCT/JP2022/040040 patent/WO2023074771A1/ja active Application Filing
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07166467A (ja) * | 1993-12-17 | 1995-06-27 | Mitsubishi Paper Mills Ltd | めっき不織布の製造方法 |
JP2017509160A (ja) * | 2013-12-20 | 2017-03-30 | ブルスウォン マテリアル カンパニー リミテッド | 電磁波遮蔽及び吸収用不織布または不織布複合材 |
JP2018152296A (ja) * | 2017-03-14 | 2018-09-27 | 住友電装株式会社 | 電磁シールド部材付ワイヤハーネス |
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DE112022005261T5 (de) | 2024-08-14 |
JPWO2023074771A1 (ja) | 2023-05-04 |
US20230411039A1 (en) | 2023-12-21 |
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