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WO1996018923A1 - Materiau faisant obstacle a l'eau pour cables de transmission torsades en couches et cable de transmission utilisant ce materiau - Google Patents

Materiau faisant obstacle a l'eau pour cables de transmission torsades en couches et cable de transmission utilisant ce materiau Download PDF

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Publication number
WO1996018923A1
WO1996018923A1 PCT/JP1995/002560 JP9502560W WO9618923A1 WO 1996018923 A1 WO1996018923 A1 WO 1996018923A1 JP 9502560 W JP9502560 W JP 9502560W WO 9618923 A1 WO9618923 A1 WO 9618923A1
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WO
WIPO (PCT)
Prior art keywords
water
communication cable
range
layer
communication
Prior art date
Application number
PCT/JP1995/002560
Other languages
English (en)
Japanese (ja)
Inventor
Yukio Sakuraba
Hirohumi Morishima
Original Assignee
Tokai Rubber Industries, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokai Rubber Industries, Ltd. filed Critical Tokai Rubber Industries, Ltd.
Priority to KR1019960704356A priority Critical patent/KR970701360A/ko
Publication of WO1996018923A1 publication Critical patent/WO1996018923A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • 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
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
    • H01B7/288—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using hygroscopic material or material swelling in the presence of liquid
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials

Definitions

  • the present invention relates to a layer-twisted communication cable in which a bundle of a plurality of communication lines is bundled in a stranded form, and the outer periphery thereof is covered with a sheath material, and a communication cable interposed inside a sheath material of the communication cable.
  • This is related to the water barrier material (water barrier tape) used.
  • the bundle j of communication lines refers to a bundle of copper wires for signal transmission, or an optical fiber core in which a plurality of optical fiber cores are bundled in a loose tube.
  • a water-blocking material (water-blocking tape, water-blocking tape, or water-blocking tape) that has the property of preventing water from entering into this optical fiber cable or shortening the length of entry even if water does. It is generally referred to as a water-absorbing tape, etc.)
  • a water-absorbing tape etc.
  • a two-layer structure in which a water-absorbing composition layer is provided on a sheet substrate is disclosed in Japanese Patent Application Laid-Open No. H11-207377.
  • Japanese Patent Application Laid-Open No. 1-250447, etc. on the other hand, as a three-layer structure in which a cover cloth is further laminated on the water-absorbing composition layer, These are presented in Japanese Patent Application Laid-Open Nos. 3-224729 and 4-357357.
  • the communication cable 50 has a plurality of optical fiber cores 56, 56 outside a buffer layer 54 provided on the outer periphery of a linear tension member 52 having tensile strength.
  • the water-impervious tape 60 is wrapped around the optical fiber cores 56, 56, with the water-absorbing cords 58, 58 Further, an aluminum / polyethylene laminated tape 62 is wound and a sheath material 64 is coated on the outermost layer.
  • the water-absorbing cords 58, 58 'and the water-shielding tape 60 absorb water and become gel-like.
  • the space between the optical fiber cores 56, 56,... In the seal 64 is sealed to prevent water from entering.
  • water-blocking material used for such communication cables generally has high rigidity. For this reason, when this water-impermeating tape is wound around a cable, the amount of water-impervious tape that falls into the gap between the optical fiber cores 56, 56, is small, and the water-impermeable property cannot be sufficiently exhibited.
  • the reason why the water-absorbing cords 58, 58 are interposed between the optical fiber cores 56, 56 is that the water-shielding tape has a small amount of water that falls into the gaps between the optical fiber cores. In this case, the number of communication lines per communication cable is reduced due to the interposition of a water-absorbing string in the communication cable. Also, as the cross-sectional outer diameter of the communication cable increases, the winding diameter in the winding operation during cable manufacturing also increases. In addition, the use of water-absorbing cords increases the manufacturing process, There are problems such as increased manufacturing costs.
  • the present invention has been made to solve such a problem, and an object of the present invention is to select an optimal range of rigidity of a water-blocking material (water-blocking table) by selecting the optimum range. This will improve the water barrier efficiency of the layered communication cable. This eliminates the need for a water-absorbing cord interposed between optical fiber cores in a communication cable, and economically provides a layer-twisted communication cable with excellent transmission efficiency to the market.
  • this object has been described for the optical fiber communication cable for the sake of explanation in pointing out the above-mentioned problems, it is also applied to a so-called copper metal-type copper wire cable. Disclosure of the invention
  • the first of the water-blocking materials for a layer-twisted communication cable of the present invention is a water-absorbing composition layer formed on the surface of a sheet substrate.
  • the gist of the invention is that the stiffness value is in the range of 0.3 to 1.5 scm 2 / cm in the longitudinal direction and in the range of 0.2 to 0.5 gf cm 2 Zcm in the transverse direction.
  • the second layer of the water-barrier material for a layer-twisted communication cable of the present invention is formed by forming a water-absorbing composition layer on the surface of a sheet substrate, and bonding a cover cloth on the water-absorbing composition layer.
  • the gist is that the rigidity value of the impermeable material is in the range of 0.3 to 1.5 gf cm 2 / cm in the vertical direction and is in the range of 0.2 to 0.5 gf cm 2 Zcm in the horizontal direction. Things.
  • the “waterproof material for cables” of the present invention has a two-layer structure in which a water-absorbing composition layer is provided on a sheet substrate, and a water-absorbing composition layer is provided on a sheet substrate. A cover cloth is further formed on the water-absorbing composition layer.
  • the three-layer structure with the laminated structure is included.
  • the sheet substrate include non-woven fabrics such as polyester fiber, polyamide fiber, polypropylene fiber, polyethylene fiber, polyacryl fiber, rayon, and vinylon, woven or knitted fabrics. A combination of any two of these synthetic fibers may be used.
  • the water-absorbing composition layer contains additives such as water-absorbing polymer particles, organic binders, other surfactants, antioxidants, and inorganic fillers.
  • additives such as water-absorbing polymer particles, organic binders, other surfactants, antioxidants, and inorganic fillers.
  • the water-absorbing polymer particles include a crosslinked polyacrylate, a neutralized product of a starch-acrylic acid graft polymer, a modified crosslinked polyvinyl alcohol, a crosslinked isobutylene-maleic anhydride copolymer, and polyethylene oxide.
  • Crosslinked products, acrylamide acrylic acid crosslinked polymers and the like can be mentioned.
  • These water-absorbing polymer particles must fall apart from the sheet base material when they come in contact with water, but there is no particular limitation on the particle shape and particle size. Or a distorted shape.
  • the particle diameter is preferably in a range (45 to 425 ⁇ 111) that does not slow down the rate of water absorption and swelling and does not delay falling off from the sheet base material.
  • particles having a particle size of 45 zm or less are contained to some extent (5% by weight or more).
  • These water-absorbing polymer particles may be used alone or in combination of two or more.
  • Organic binders mainly include rubber-based materials and thermoplastic elastomer-synthetic resin-based materials.
  • Rubber-based materials include styrene rubber, butyl rubber, butadiene rubber, isoprene rubber, ethylene-propylene rubber, chlorosulfonated polyethylene rubber, silicon rubber, Chloroprene rubber, polyurethane rubber, acrylic rubber, chlorinated butyl rubber, epichlorohydrin rubber, and others.
  • thermoplastic elastomer-based synthetic resin materials include ethylene-vinyl acetate copolymer, ethylene-propylene copolymer, acrylonitrile-butadiene copolymer, styrene-butadiene copolymer, polyester resin, and the like. Examples include polyamide resins, urethane resins, and other thermoplastic elastomers. As the organic binder, these rubber materials and synthetic resin materials may be used alone or in combination of two or more, or may be a mixture of those obtained by random polymerization.
  • nonwoven fabric In the case of a three-layer water barrier material, nonwoven fabric, woven fabric, knitted fabric, etc. are used as the material of the force bar cloth bonded onto the water absorbing composition layer.
  • This cover cloth is used in a high humidity environment such as the rainy season, when the water-impervious tape is left, and when it absorbs moisture significantly, it prevents blocking of the tapes and stains the guide rolls while winding around the fiber cable. In order to prevent such troubles as possible, it must have a suitable clearance so as not to impair the water blocking performance, and must be able to withstand the tension during laminating.
  • the best material for the cover cloth is a non-woven fabric sheet made of synthetic fiber.
  • a plurality of communication lines are further bundled in a stranded form, a water-impervious tape is wound around the outer periphery, and the outer periphery is covered with a sheath material.
  • a layer-twisted communication cable comprising: a water-absorbing composition layer on a surface of a sheet substrate; This paper proposes that the rigidity value of the water tape itself is in the range of 0.3 to 1.5 gf cm 2 / cm in the longitudinal direction and 0.2 to 0.5 gf cm 2 / cm in the lateral direction.
  • a plurality of communication wires in which a plurality of communication wires are bundled are further bundled in a stranded form, a water-impervious tape is wrapped around the outer circumference, and the outer circumference is covered with a sheath material.
  • the water-blocking tape has a water-absorbing composition layer on the surface of a sheet substrate, and a cover cloth is laminated on the water-absorbing composition layer.
  • Te in which the stiffness value of the water blocking tape itself this is in the range of 0.3 ⁇ 1.5 gf cm 2 Bruno cm in ⁇ direction, and presenting what laterally in the range of 0.2 to 0.5 gfcm 2 / cm .
  • These layered type communication cables are applied to both those in which the communication line is a copper wire and those in which an optical fiber is used.
  • the rigidity of the waterproofing material (waterproofing tape) for the cable can be measured in the longitudinal direction (the tape length direction).
  • the overall thickness of the water barrier material be in the range of 0.25 to 0.65 mm.
  • this impervious material does not satisfy either the longitudinal rigidity or the lateral rigidity, for example, the longitudinal rigidity is higher than 1.5 gf cm 2 / cm, or the lateral rigidity If it is higher than 0.5 cm 2 / cm, the water-impervious material (water-impervious tape) will fall into the gap between the communication line bundles too little, resulting in poor water-impermeability when water enters the cable. Become. If the stiffness value in the vertical direction is lower than 0.3 cm 2 Z cm or the stiffness value in the horizontal direction is lower than 0.2 gfcm 2 / cm, the impermeable tape falls into the gap between the communication line bundles.
  • the degree is good, in order to satisfy the rigidity value, not only the sheet base material is made thinner but also the adhesion amount of the water-absorbing composition on the sheet base material is not reduced, and as a result, the water barrier performance is reduced. It is not preferable because it causes a problem of lowering.
  • Various conditions can be set to optimize the rigidity characteristics.
  • the sheet substrate is a non-woven fabric
  • when controlling the basis weight of the non-woven fabric or attaching the cover cloth It is effective to keep the overall thickness of the water-blocking tape in the range of 0.25 to 0.65 mm by using a thin material.
  • the rigidity of the water-blocking material of the present invention is improved by blending an inorganic filler such as silica with the water-absorbing composition. Laminating a cover cloth on the water-absorbing composition layer or laminating a reinforcing film on the sheet substrate is effective to increase the rigidity value.However, simply laminating a cover cloth or the like is effective.
  • the rigidity value is not always satisfied, and the basis weight of the sheet base material, the content of the water-absorbing composition or the material of the force par cloth and the basis weight thereof contribute synergistically.
  • an appropriate amount of a surfactant is blended to improve the hydrophilicity of the organic binder, or an oxidizing agent is used to prevent the organic binder from discoloring and hardening due to heat deterioration. It is advisable to add a deterioration inhibitor.
  • Surfactants include anionic surfactants, nonionic surfactants, cationic surfactants, metal salts of carboxylic acids, polyhydric alcohols, amino alcohols, linear polyethers, saccharides, sugar alcohols, Sorbinone fatty acid ester, Polyhydric alcohol glycidyl ether, Alkyl phosphate alkali metal salt, Polyoxyethylene Alkyl ether and the like.
  • an inorganic filler such as silica is blended as described above to increase the rigidity, the adhesiveness (stickiness) during the winding operation of the optical fiber and cable is also improved.
  • Fig. 1 is an external perspective view showing a copper twisted cable as an example of a layer twisted communication cable to which the present invention is applied.
  • Fig. 2 is a copper twisted cable twisted type shown in Fig. 1.
  • 3 is an external perspective view showing an optical fiber loose tube type as another example of the layered communication cable to which the present invention is applied, and
  • FIG. 4 is an optical perspective view of the optical fiber cable shown in FIG.
  • Fig. 5 is a cross-sectional view of a layered communication cable of fiber loose tube and
  • Fig. 5 is a schematic diagram showing the main parts of a stiffness measurement test (KES method) device used to confirm the effectiveness of the present invention.
  • Fig. 1 is an external perspective view showing a copper twisted cable as an example of a layer twisted communication cable to which the present invention is applied.
  • Fig. 2 is a copper twisted cable twisted type shown in Fig. 1.
  • 3 is an external perspective view showing an optical fiber loose tube type as another example of the layered
  • FIG. 6 is a schematic configuration diagram of a test device for evaluating the amount of water-impervious material sheet dropped into the mouth, which was also used to confirm the effect of the present invention
  • Fig. 7 is a T-shaped water-impermeability measuring device.
  • FIG. 8 is a perspective view of an L-shaped water impermeability measuring device
  • FIG. 9 is a conventionally known layer. Evening optical fiber as an example of the types of communication cable is a cross-sectional view of one of the drive.
  • Figures 1 and 2 show examples of metal-twisted layered communication cables using copper wires as communication lines.
  • the metal-type communication cable 10 is composed of a large number of copper wires 1 2, 1 2,... As one bundle, and the copper wire bundles 14, 1 4,. Copper wire bundle 1 4, 1 4- ⁇ ⁇ ⁇
  • a water-impervious tape 16 is wrapped around the outer periphery of the group, and a sheath 18 is further coated around the outer periphery.
  • Figures 3 and 4 show examples of layer-twisted communication cables for optical loose tubes using optical fiber lines as communication lines.
  • This optical loose tube communication cable 20 passes a plurality of optical fiber wires 22, 22,... Through a single loose tube 24, and passes this through a buffer layer 27 provided around a tension member 26.
  • the optical loose tube bundles 24, 24 are wound around the outer periphery of a group of optical loose tube bundles 24, 24,..., And the outer periphery thereof is covered with a sheath material 28.
  • Table 1 summarizes the types of various test samples of the product of the present invention and the comparative product, and the test results.
  • Test samples 1 to 3 in Table 1 show a water-blocking material (water-blocking tape) having a two-layer structure in which a water-absorbing composition layer was provided on a sheet substrate, and test samples 4 to 10 were In addition, a three-layer water-blocking material (water-blocking tape) is shown, in which a water-absorbing composition layer is provided on a sheet substrate, and a cover cloth is further coated thereon.
  • test sample 1 is a comparative product
  • test samples 2 and 3 are products of the present invention.
  • test samples 4 to 6 are comparative products
  • test samples 7 to 10 are products of the present invention.
  • the sheet material of the water barrier material of each of the test samples 1 to 10 was made of polyester spunbonded nonwoven fabric (trade name “Marix 70xx xWTO”, manufactured by Unitika) and polyester single yarn fineness of 2 denier. Is used. And those test sample 1-3 (two-layered structure), as also shown in Table 1, adopted what basis weight was constant at 40 g / m 2, test samples 4; 10 (3 In the case of (layer structure), several steps are selected in the range of 20 to 60 gZm2. The three water-absorbing compositions shown in Table 2 below were tested. In the following description, each unit “part” means “part by weight”.
  • the water-absorbing compositions No. 1 to No. 3 are all water-absorbing resin polymers (Kuraray's trade name “KI Gel”), which are cross-linked metal salts of isobutylene-maleic acid copolymer.
  • 200 1 K—F 3 200 parts of styrene-butadiene-styrene (SB S) thermoplastic elastomer (trade name“ Califlex TR—111 ”manufactured by Shell Chemical Co., Ltd.) and butyl rubber (ezo)
  • the basic composition is 100 parts by mixing with the product name “Essobutyl # 268”).
  • the mixing ratio of the SBS thermoplastic elastomer and butyl rubber is 80 parts: 20 parts for No. 1, 20 parts: 80 parts for No. 2, and 0 parts: 100 parts for No. 3.
  • 4 parts of a surfactant of polyethylene glycol (trade name “PEG600” manufactured by NOF CORPORATION) and a phenolic antioxidant deterioration inhibitor (trade name “IRGANOX 565” manufactured by Ciba-Geigy Co., Ltd.) are used. ))
  • a surfactant of polyethylene glycol trade name “PEG600” manufactured by NOF CORPORATION
  • a phenolic antioxidant deterioration inhibitor trade name “IRGANOX 565” manufactured by Ciba-Geigy Co., Ltd.
  • Table 1 shows which type of water-absorbing composition was used for each of the test samples 1 to 10.Table 1 also shows the amount of the water-absorbing composition applied. Is shown in The adhesion of the water-absorbing composition is fixed at 150 g / m2 for the two- layer structure (samples 1 to 3), and the test value for the three-layer structure (samples 4 to 10). Only sample 4 was as small as 110 g / m 2, and the other test samples 5 to 10 were fixed at 150 g / m 2 . As a result, the tape thickness of the two-layer structure (samples 1 to 3) was constant at 0.3 mm.
  • a cover cloth is laminated on the water-absorbing composition layer.
  • cover cloth material of test samples 4 to 10 of all samples spunbonded nonwoven fabric of polypropylene (Mitsui Chemical Oil Co., Ltd. product name “Syntex PK-102j”), polypropylene single yarn for all test samples 4 to 10
  • the denier of 4 denier is bonded, and the basis weight of the nonwoven fabric is fixed at 12 g / m 2 .
  • the tape thickness of Test Sample 4 with the smallest amount of the water-absorbing composition attached was the thinnest 0.2 mm, followed by the tape thickness of Sample 5 with the smallest nonwoven fabric weight of the sheet substrate. was thin. It goes without saying that the tape thickness increases as the nonwoven fabric weight of the sheet substrate increases.
  • This water-blocking material is prepared by dissolving and dispersing an organic binder such as a binder resin in an organic solvent such as toluene, methyl ethyl ketone, or ethyl acetate using a stirrer, and then mixing the water-absorbing polymer particles with this. Other additives are mixed if necessary. Then, this is coated on the surface of the sheet base material using a barco, a mouth, a ruco and the like to form a water-absorbing composition layer.
  • an organic binder such as a binder resin
  • an organic solvent such as toluene, methyl ethyl ketone, or ethyl acetate
  • Other additives are mixed if necessary.
  • this is coated on the surface of the sheet base material using a barco, a mouth, a ruco and the like to form a water-absorbing composition layer.
  • test items included the rigidity properties (longitudinal and lateral directions) of the water-blocking material, the ability to drop into the gap, and the water-blocking properties (T-type and L-type), which were measured by the methods described below. .
  • the bending stiffness per unit (unit: gf cmVcm) was measured (referred to as the “KES method”) Water-impervious material (water-impervious tape) to measure longitudinal and lateral stiffness values ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
  • the specimen with low stiffness (Sample 4) had a large amount of water-impervious material sheet drop between the mouths, while the specimen with high stiffness (Sample 4) Samples 1, 5, and 6) were found to have a small amount of the seepage barrier sheet between the rods.
  • the heat-shrinkable tube 41 in the middle of the simulated cable 42 is peeled off over 1 cm, and a water supply pipe 44 is provided thereon, and artificial water is supplied to the water supply pipe 44 to a height of 1 m.
  • a cock (not shown) is opened to penetrate the water-impervious tape 16, and after 24 hours, how much water runs into the gap between the round bars of the simulated cable 42
  • the water running performance in the T-shaped direction was evaluated depending on whether the water was blocked. The shorter the length of running water, the better the water barrier. If it exceeds 5 Ocm, it is judged that it cannot be used.
  • this is a test of how water can be cut off in the longitudinal direction of the cable when the cable is cut by external force and water enters from the cross section of the cable. It is.
  • This device is described with reference to FIG. 8.
  • a simulated cable 42 is prepared in the same manner as the T-shaped water-blocking test shown in FIG. 7, and a water supply pipe 46 is provided at one end. Then, with the water supply pipe 46 filled with artificial seawater up to a height of 1 m, a coke (not shown) was opened, and water was injected into the cable 42.
  • the comparative product (test sample 1) has poor T-shaped and L-shaped water impermeability characteristics. (marked with x), and both of the products 2 and 3 of the present invention were judged to have excellent water barrier properties (marked with ⁇ ).
  • the reason for this is that the comparative product (test sample 1) has a high rigidity value, especially in the vertical direction, so that the amount of water that falls into the gap when the impermeable table is wound around a bundle of round bars is small ( It is considered that when water entered the cable, it was easy for water to run and it was difficult to block water entry.
  • test sample 1 The difference in the rigidity between the comparative product (test sample 1) and the product of the present invention (test samples 2 and 3) was attributed to the water-absorbing composition layer provided on the sheet substrate.
  • test samples 4 to 10 were judged to be poor (marked by X) in both T-shaped and L-shaped water-blocking characteristics. It was determined that all of the products of the present invention 7 to 10 had excellent water barrier properties (marked with “ ⁇ ”). The reason for this is that, first of all, test sample 4 of the comparative product can have a large amount of drop into the gap when the impermeable tape is wrapped around a bundle of round bars. It is considered that the water-blocking properties were impaired because the amount of the water-absorbing composition attached was too small.
  • Comparative Samples 5 and 6 the ratio of styrene-butadiene-styrene thermoplastic elastomer in the organic pinder contained in the composition of the water-absorbing composition layer provided on the sheet substrate was high, indicating that the ratio between the round bars was high. It is considered that the amount of water-impervious tape dropping into the gap was reduced, which made it difficult to prevent water from entering the cable.
  • the type of water-absorbing composition applied to the sheet substrate (composition content) and the amount applied (the amount of adhesion) are effective to enhance the water-shielding performance, as described above.
  • the thickness of the tape as a whole is 0.25 mm or more, there is a synergistic effect with the amount of dip, but it is presumed that good results are obtained for the water barrier properties.
  • the upper limit of the tape thickness is 0.65 mm, and if it is larger than that, the weight of the nonwoven fabric of the sheet substrate increases or the water-absorbing composition layer becomes thicker. Improvement of water characteristics cannot be expected anymore, and the economic loss due to increased product costs should be avoided.
  • various examples were tested.
  • the present invention is not limited to the above examples, and various modifications can be made without departing from the gist of the present invention.
  • various types of sheet base materials, water-absorbing compositions, cover cloths, etc. may be changed, or the amount of the water-absorbing composition, the fineness of the sheet base material, the cover cloth, the basis weight, etc. may be changed.
  • those in which the rigidity values in the longitudinal and lateral directions are included in the numerical range of the present invention are in line with the gist of the present invention.
  • the waterproofing material for cable (waterproofing tape) of the present invention can be applied to a layer-twisted communication cable by setting the rigidity value in the vertical direction and the rigidity value in the horizontal direction to an appropriate range.
  • the water-impervious tape drops into the gaps between the communication bundles better, thereby maintaining the water-impervious performance of the water-impervious tape. This eliminates the need to interpose a water-absorbing cord in the communication cable, and can provide a layer-twisted communication cable with high transmission efficiency to the market.
  • RTK material (9 / l ) 110 150 150 150 150 150 150 150 150 150 150 m Vertical (gfcm 2 / c «) 0.2 (X) 1.6 (X) 1.7 ") 1.0 0.9 1.5 1.2 1.6 IX) 0.9 0.7 Width (gfcmVcii) 0.1 (X) 0.61X) 0.6 (X) 0.5 0.4 0.5 0.4 0.5 0.4 0.2 Depression * ( « «) 0.3 0.1500 0.1 (X) 0.2 0.25 0.2 0.25 0.1 (X) 0.25 0.3 Shield T type ( cm) 85 (X) 103 (X) 78 (X) 38 25 43 21 91) 40 21 Water

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Insulated Conductors (AREA)
  • Laminated Bodies (AREA)
  • Communication Cables (AREA)

Abstract

L'invention traite d'un matériau faisant obstacle à l'eau (bande imperméable) pour câbles de transmission torsadés en couches, à conducteurs en cuivre et sous forme de fibres optiques libres dans la gaine. Ce matériau conserve ses propriétés imperméables lorsqu'il est enroulé autour d'un câble de transmission comprenant des faisceaux torsadés de conducteurs ou de fibres et qu'il est amené à combler correctement les vides existant entre les faisceaux de fils torsadés. Il est constitué d'une structure à deux couches, à savoir d'un substrat sous forme de feuille et d'une couche de matériau absorbant l'eau sur le substrat ou d'une structure à trois couches comprenant un substrat sous forme de feuille, une couche de matériau absorbant l'eau et un tissu de couverture sur la couche de matériau absorbant. La rigidité de ce matériau, mesurée longitudinalement, a une valeur comprise entre 0, 3 et 1, 5 gfcm2 par centimètre et, mesurée latéralement, une valeur comprise entre 0, 2 et 0, 5 gfcm2 par centimètre.
PCT/JP1995/002560 1994-12-15 1995-12-13 Materiau faisant obstacle a l'eau pour cables de transmission torsades en couches et cable de transmission utilisant ce materiau WO1996018923A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960704356A KR970701360A (ko) 1994-12-15 1995-12-13 층연형 통신케이블용 차수재 및 그것을 사용한 층연형 통신케이블

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6/333883 1994-12-15
JP6333883A JPH08171819A (ja) 1994-12-15 1994-12-15 層撚型通信ケーブル用遮水材およびそれを用いた層撚型通信ケーブル

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Publication Number Publication Date
WO1996018923A1 true WO1996018923A1 (fr) 1996-06-20

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JP (1) JPH08171819A (fr)
KR (1) KR970701360A (fr)
CN (1) CN1141082A (fr)
WO (1) WO1996018923A1 (fr)

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EP1215686A3 (fr) * 2000-12-14 2004-01-14 Nexans Câble à trois âmes
AU2003208859B2 (en) * 2002-05-21 2007-01-04 Carl Freudenberg Kg Flexible band or flat cable
CN104898232A (zh) * 2015-05-29 2015-09-09 成都亨通光通信有限公司 一种具有全截面阻水能力的光通讯线

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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JPS6049308A (ja) * 1983-08-29 1985-03-18 Dainichi Nippon Cables Ltd 遮水形光ファイバケ−ブル
JPS62249117A (ja) * 1986-04-22 1987-10-30 Toppan Printing Co Ltd 光フアイバ−ケ−ブル
JPH04357623A (ja) * 1991-02-22 1992-12-10 Fukuoka Cloth Kogyo Kk 光ファイバケーブル用止水テープ

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EP1215686A3 (fr) * 2000-12-14 2004-01-14 Nexans Câble à trois âmes
AU2003208859B2 (en) * 2002-05-21 2007-01-04 Carl Freudenberg Kg Flexible band or flat cable
CN104898232A (zh) * 2015-05-29 2015-09-09 成都亨通光通信有限公司 一种具有全截面阻水能力的光通讯线

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CN1141082A (zh) 1997-01-22
JPH08171819A (ja) 1996-07-02
KR970701360A (ko) 1997-03-17

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