WO2004107005A1 - Cable fibre optique et son procede de production - Google Patents

Cable fibre optique et son procede de production Download PDF

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Publication number
WO2004107005A1
WO2004107005A1 PCT/JP2004/007652 JP2004007652W WO2004107005A1 WO 2004107005 A1 WO2004107005 A1 WO 2004107005A1 JP 2004007652 W JP2004007652 W JP 2004007652W WO 2004107005 A1 WO2004107005 A1 WO 2004107005A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical fiber
fiber cable
manufacturing
pof
jacket tube
Prior art date
Application number
PCT/JP2004/007652
Other languages
English (en)
Japanese (ja)
Inventor
Yoshitaka Matsuyama
Hitoshi Tsuchiya
Original Assignee
Asahi Glass Company, Limited
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 Asahi Glass Company, Limited filed Critical Asahi Glass Company, Limited
Priority to JP2005506548A priority Critical patent/JP4320660B2/ja
Publication of WO2004107005A1 publication Critical patent/WO2004107005A1/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
    • G02B6/4479—Manufacturing methods of optical cables
    • G02B6/4486—Protective covering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00663—Production of light guides

Definitions

  • the present invention relates to a method for manufacturing an optical fiber cable in which a plastic optical fiber is housed in a jacket tube, and an optical fiber cable obtained by the method.
  • the optical fiber used as a large-capacity communication medium is a silica glass optical fiber.
  • GI-POF graded-index plastic optical fiber
  • Babai a graded-index plastic optical fiber that has a distribution of the refractive index in the cross-sectional direction has a high-speed, large-capacity transmission capability, and is used in next-generation communications. It is expected as an optical fiber.
  • the bare optical fiber (bare fiber) is not practical, and it is not practical, and it is necessary to protect the optical fiber, increase the number of cores, attach connectors, and so on. It is used as an optical fiber cable by being compounded with a tensile strength material such as wire or a fiber tensile strength material such as aramid fiber.
  • the method of manufacturing this optical fiber cable basically consists of extruding the outer periphery of the outer tube with a thermoplastic resin, etc., together with a constituent material such as a tensile member (tension member) that resists the POF against pulling, and covering and forming the sheath tube. It is done by doing.
  • the POF is easily affected by the heat of a thermoplastic resin or the like melted at a high temperature, and the heat may reduce the physical properties of the POF.
  • GI_POF low molecular compound materials with different refractive indices are contained in the resin material
  • a method of forming a GI-POF by thermally diffusing a material to form a refractive index distribution is a method of forming a GI-POF by thermally diffusing a material to form a refractive index distribution.
  • low-molecular compound materials undergo thermal diffusion in the GI-PF under the influence of heat during coating molding into a cable, and the refractive index distribution changes, resulting in transmission loss. May increase. For this reason, when converting GI-POF into a cable, it is necessary to manufacture the cable so that it is not affected by heat.
  • WO01 / 95002 pamphlet includes a plurality of GI-POFs and a resin cable body including the GI-POF.
  • An optical fiber cable is disclosed, which is movable and dispersed one by one.
  • a typical coating resin is a soft vinyl chloride resin-polyethylene resin. If there is, you can usually use it.
  • optical fiber cables are required to have further flame retardancy.
  • flame retardancy is usually achieved by adding a flame retardant to the jacket tube.
  • the melting temperature of the resin generally increases in accordance with the content of the flame retardant. For example, even in the case of the above-mentioned soft pinyl chloride resin or polyethylene resin, the melting temperature may rise to 140 ° C. or more depending on the amount of the flame retardant added. Therefore, when a resin having higher flame retardancy is used as the jacket tube, it is necessary to mold the jacket tube at a molding temperature exceeding 140 ° C.
  • an object of the present invention is to form a jacket tube at a higher temperature without increasing transmission loss, and as a result, a resin having excellent flame retardancy can be used as the jacket tube.
  • Another object of the present invention is to provide a method for manufacturing a small-diameter optical fiber cable. Disclosure of the invention
  • a method of manufacturing an optical fiber cable according to the present invention is directed to a method of manufacturing an optical fiber cable in which an outer tube is extruded and formed around a plastic optical fiber through a gap or another material.
  • the plastic optical fiber is cooled and introduced into an extruder.
  • cooling is preferably performed immediately before introduction into the extrusion molding apparatus.
  • the influence of the heat to POF can be reduced significantly by cooling before introducing POF into an extrusion-molding apparatus. Therefore, it is possible to form the jacket tube at a higher temperature without increasing transmission loss, and it is possible to use a resin having excellent flame retardancy as the jacket tube.
  • the cooling temperature is 5 or less. By setting the cooling temperature of the POF at 5 ° C. or less, the influence of heat on the POF can be significantly reduced.
  • the optical fiber cable has no spacer. This is because the present invention is suitable for manufacturing an optical fiber cable having no spacer.
  • the outer diameter of the optical fiber cable is preferably 7 mm or less. This is because the present invention is suitable for manufacturing an optical fiber cable having such a small outer diameter.
  • the optical fiber cable formed by covering the jacket tube with the extrusion molding device is forcibly cooled immediately after being taken out of the extrusion molding device. According to this, since the cooling is performed immediately after the jacket tube is formed, the cooling effect of P ⁇ F is further enhanced, and an increase in transmission loss at the time of forming at a high temperature can be further prevented.
  • the other material is a fiber tensile strength member. According to this, since the fiber strength member itself has heat insulating properties, it is possible to further prevent an increase in transmission loss during molding at a high temperature.
  • the outer tube contains a flame retardant and is made of a thermoplastic resin having a melting temperature of 140 to 190 ° C. According to this, a resin having excellent flame retardancy can be used as the jacket tube, and the flame retardancy of the optical fiber cable can be improved.
  • the optical fiber cable of the present invention is an optical fiber cable obtained by the above manufacturing method, wherein the flame retardancy of the resin used for the sheath tube of the optical fiber cable is specified by JISK7201. It has a characteristic oxygen index of 29 or more. According to this, an optical fiber cable having excellent flame retardancy can be obtained, so that high flame retardancy is required, such as vertical trunk lines of buildings and condominiums, horizontal wiring on each floor, floor wiring, and the like. It can be suitably used for applications. BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 is a cross-sectional view showing one embodiment of an optical fiber cable obtained by the manufacturing method of the present invention.
  • FIG. 2 is a schematic configuration diagram illustrating an embodiment of an apparatus for manufacturing an optical fiber cable used in the manufacturing method of the present invention.
  • FIG. 3 is a perspective view of the cooling device.
  • FIG. 4 is a sectional view taken along the line BB of FIG.
  • FIG. 5 is a partial perspective view showing the vicinity of a nozzle of the extrusion molding apparatus.
  • FIG. 6 is a sectional view showing another embodiment of the optical fiber cable obtained by the manufacturing method of the present invention.
  • FIG. 7 is a schematic configuration diagram showing another embodiment of the optical fiber cable manufacturing apparatus used in the manufacturing method of the present invention.
  • Cooling device 310: Box, 311: Lid, 312: Pipe,
  • FIG. 1 shows an embodiment of an optical fiber cable obtained by the manufacturing method of the present invention.
  • the optical fiber cable 10 has two POFs 20 arranged in the center, two strength members 30 respectively arranged outside the POF 20, and an outer periphery of the POF 20 surrounded by a gap 40. To cover the outer periphery of the tensile strength member 30 An outer tube 50 is provided.
  • the inner surface of the outer cover tube 50 and the outer periphery of the POF 20 are the length of the optical fiber cable.
  • the inner surface of the outer tube 50 and the outer periphery of the P ⁇ F 20 are at least partially non-contact (not entirely non-contact) "means one or more points on the outer periphery of the POF 20.
  • the POFs 20 are distributed and arranged one by one in a freely movable state inside the jacket tube 50.
  • the material of POF 20 is not particularly limited, and a fluororesin, a polymethylmethacrylate (PMMA) resin, or the like can be used. Above all, it is preferable to use a fluororesin, especially a transparent fluororesin, since transmission loss is low and a usable wavelength range of light is wide.
  • a fluororesin POF for example, those described in JP-A-8-55848 or the like are preferably used.
  • the outer diameter of POF20 is preferably from 400 to 100 x m.
  • a metal wire such as a zinc plated hard steel wire, a copper alloy, and stainless steel, or a fiber reinforced plastic obtained by solidifying aramide fiber, glass fiber, or the like with a resin is preferably used.
  • an extrudable thermoplastic resin such as a soft vinyl chloride resin and a polyethylene resin can be used.
  • a thermoplastic resin having a melting temperature of 140 to 190 is preferably used.
  • the optical fiber cable does not have the fiber tensile strength member of the outer periphery of the POF and the outer tube, that is, at least a gap is formed between the inner surface of the outer tube covering the POF and the outer periphery of the P 0 F.
  • the melting temperature of the thermoplastic resin is preferably 140 to 170 ° C. Also, as described later, When the fiber tension member is provided between the outer circumference of the POF and the inner surface of the outer tube, at least a part between the inner surface of the outer tube covering the POF and the outer circumference of the In the case of non-contact (separated) and a configuration in which the fiber tensile strength member is arranged between the inner surface of the outer tube and the outer periphery of the POF, the melting temperature of the above thermoplastic resin is 1 65 ⁇ 190 ° C is preferred. Examples of such a resin include a so-called flame-retardant grade resin obtained by adding a flame retardant to a thermoplastic resin such as the above-mentioned soft vinyl chloride resin or polyethylene resin.
  • This optical fiber cable 10 preferably does not have a spacer.
  • the spacer is a spacer such as a slotted spacer.
  • These spacers can also function as insulation. That is, when manufacturing an optical fiber cable having a spacer, there is little restriction on the material of the jacket tube. Conversely, in the case of an optical fiber cable having no spacer, it is preferable to apply the manufacturing method of the present invention in that the restriction on the material (molding temperature) of the jacket tube can be eliminated.
  • these small diameter cables have one to six cores.
  • FIG. 2 to 5 show an apparatus for manufacturing the optical fiber cable 10 described above.
  • 2 is a schematic configuration diagram showing the entire manufacturing apparatus
  • FIG. 3 is a perspective view of the cooling apparatus
  • FIG. 4 is a cross-sectional view taken along the line B-B of FIG. 3
  • FIG. 5 shows the vicinity of the nozzle of the extrusion apparatus. It is a partial perspective view.
  • reference numeral 21 denotes a POF take-up reel.
  • the two POFs 20 fed from the reel 21 are guided by guide rollers 14 0 and 15 2 through guide rollers 12 1, 12 2 and 12 3, respectively. Introduced in 300 ing.
  • Reference numeral 31 denotes a payout reel for the tensile strength member 30.
  • the two strength members 30 drawn out from the reel 31 are also guided by the guide rollers 140 and 150, respectively.
  • a cooling device 300 is provided in front of the guide roller 150 (in the traveling direction of the POF 200).
  • the cooling device 300 has a box 310, a lid 3111, and a pipe 312 penetrating the box 310.
  • the inside of the box 310 and the outer periphery of the pipe 312 are filled with dry ice 3200.
  • a heat insulating material 3 13 is attached to the inner wall of the box 3 12.
  • the two aligned POFs 20 and the two strength members 30 are passed through the inside of the pipe 312.
  • two POFs 20 and two strength members 30 are appropriately stretched so as not to contact the inner wall of the pipe 312.
  • the material of the box 310 metals such as stainless steel and aluminum, and resins such as polyethylene and polypropylene are preferably used.
  • metals such as stainless steel and aluminum, and resins such as polyethylene and polypropylene are preferably used.
  • resins such as polyethylene and polypropylene are preferably used.
  • copper, brass, stainless steel or the like is preferably used.
  • Urethane foam, styrene foam or the like is preferably used as the heat insulating material 3 13.
  • the cooling device 300 is adjusted so that the surface temperature (cooling temperature) of the POF 20 derived therefrom is preferably 5 ° C or lower, more preferably 110 ° C or lower. Although there is no particular lower limit for the cooling temperature, it is preferably ⁇ 80 ° C. or higher from the viewpoint of easy handling of P ⁇ F. This cooling can significantly reduce the effect of heat on the POF 20 and prevent an increase in transmission loss.
  • the surface temperature of the POF can be measured by bringing a thermocouple into contact with the surface of the POF. In this case, it is preferable that the thermometer and the POF are covered together with a heat insulating material.
  • the cooling means of the cooling device 300 is not limited to the dry ice described above, but surrounds the pipe 312.
  • a structure in which a cooling medium flows through a cooling pipe for cooling a structure in which a pair of cooling plates cooled by a Peltier element or the like are passed, and the like can be adopted.
  • a contact-type cooling means such as a cooling roller can be employed.
  • the tensile strength member 300 only needs to be disposed outside the POF 20 and does not necessarily need to pass through the cooling device 300.
  • An extruder 400 for extruding the jacket tube 50 is provided at the outlet of the cooling device 300. It is preferable that the cooling device 300 and the extrusion device 400 are arranged as close as possible. That is, the POF 200 is preferably cooled just before being introduced into the extrusion molding apparatus 400. This is to prevent the POF 20 cooled by passing through the cooling device 300 from warming up.
  • the cooling temperature of P ⁇ F 20 in the POF introduction portion of the nozzle 410 of the extrusion apparatus 400 is preferably 5 or less, more preferably 110 ° C. or less.
  • the passage time of POF 20 from the outlet of the cooling device 300 to the POF introduction portion of the nozzle 410 is preferably 2 seconds or less, and particularly preferably 1 second or less.
  • the nozzle 4100 of the extrusion molding apparatus 400 has two projections 4200 having a hole 22 through which the POF 20 passes.
  • a core 4400 comprising a flat portion 4340 having holes 32 through which the tensile strength members 30 are inserted and disposed on both sides, and a predetermined gap is further provided on the outer periphery of the core 4400.
  • an outer cylinder 450 arranged.
  • the POF 20 is passed through the hole 22, and the tensile strength member 30 is inserted through the hole 32, and the outside is inserted between the core 44 and the outer cylinder 450.
  • the thermoplastic resin forming the covered tube 50 is extruded into a spectacle shape in a molten state to form the covered tube 50.
  • the POF 20 Since the cooling is performed by the initial cooling device 300, the synergistic effect of the two can prevent the POF 20 from deteriorating due to heat and prevent an increase in transmission loss.
  • a cooling water tank 500 is provided further ahead of the extrusion molding apparatus 400.
  • the optical fiber cable 10 formed by covering the jacket tube 50 passes through the water in the cooling water tank 500.
  • the jacket tube 50 just formed is rapidly cooled, preventing heat from being transmitted to the POF 20 inside, and transmission. Prevent loss increase.
  • a take-off device 600 is arranged.
  • the take-up machine 600 is stretched over a pair of pulleys 6 11 and 6 12 and rotates, and the take-up machine 6 0 0 is stretched over a pair of pulleys 6 2 1 and 6 2 2 to rotate.
  • It has a lower belt 62 and has a structure in which the optical fiber cable 10 is sandwiched between the belts 6 10 and 6 20 and fed out.
  • the optical fiber cable 10 thus formed is wound and stored on a winding reel (not shown).
  • the optical fiber cable 10 obtained by the above-described manufacturing method can greatly reduce the influence of heat on POF20. Therefore, the jacket tube 50 can be molded at a higher temperature without increasing transmission loss, and a resin having excellent flame retardancy can be used as the jacket tube 50. As a result, the flame retardancy of the optical fiber cable 10 can be improved.
  • the flame retardancy of the resin used for this jacket tube is represented by the oxygen index (L ⁇ I%) specified by JISK7201. According to the production method of the present invention, it is possible to produce an optical fiber cable 10 having a jacket tube 50 using a resin having an oxygen index of 29 or more.
  • FIG. 6 shows another embodiment of the optical fiber cable obtained by the manufacturing method of the present invention.
  • FIG. 7 shows an apparatus for manufacturing the optical fiber cable.
  • the same parts as those of the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
  • the optical fiber cable 11 has a fiber
  • the fiber tensile strength member 60 is surrounded by a tensile strength member 60, and the outer periphery of the fiber tensile strength member 60 is further covered with a jacket tube 51.
  • the fiber strength member 60 between the POF 20 and the jacket tube 50, the heat insulating property of the fiber strength member itself is utilized, and the sheath tube 5 at a high temperature is used. It is possible to further prevent an increase in transmission loss during molding of 1.
  • the fiber tensile strength member 60 for example, fibers such as aramide fiber, polyethylene terephthalate (PET) fiber, carbon fiber, and glass fiber can be used. Above all, it is preferable to use aramide fiber from the viewpoint of rigidity, flexibility, and prevention of fiber breakage due to repeated bending.
  • PET polyethylene terephthalate
  • carbon fiber carbon fiber
  • glass fiber glass fiber
  • aramide fiber from the viewpoint of rigidity, flexibility, and prevention of fiber breakage due to repeated bending.
  • the apparatus for manufacturing the optical fiber cable 11 includes a reel 21 that feeds out one POF 20 and a reel 61 that feeds out four fiber strength members 60. This is different from the manufacturing apparatus in FIG.
  • the fiber bundle 62 of the fiber tensile strength material unwound from the reel 61 is guided by guide rollers 161, 162, and 163, and is drawn out onto the manufacturing line.
  • the fiber bundle 62 is inserted into the extruder 400 in a state of being arranged in four directions so as to surround the POF 20.
  • the outer periphery of the POF 20 is annularly surrounded to form a fiber tensile strength member 60 as shown in FIG. .
  • An optical fiber cable having the structure shown in FIG. 1 was manufactured using the apparatus shown in FIG. P ⁇ F 20 is a fluororesin POF (manufactured by Asahi Glass Co., Ltd., trade name: Lucina) manufactured by the method described in the above-mentioned Japanese Patent Application Laid-Open No. Hei 8-55848, and has an outer diameter of 0.5. mm.
  • a fluororesin POF manufactured by Asahi Glass Co., Ltd., trade name: Lucina
  • the cooling device 300 is a copper pipe with an inner diameter of 8 mm and a length of 30 cm as the pipe 3 1 2
  • the cooling was performed under the conditions of a linear velocity of P ⁇ F 10 of 15 mZ and a residence time of 1.2 seconds, and the surface temperature of the POF 20 derived from the cooling device 300 was adjusted to 110.
  • the distance from the outlet of the cooling device 300 to the inlet of the nozzle 410 of the extrusion device 400 was 10 cm.
  • Flame-retardant polyethylene (trade name: SNE 9932N: manufactured by RIKEN TECHNOS) is used as the jacket tube 50, the melting temperature is 160 ° C, the outer diameter of the jacket tube 50 is 3.5X6.4mm, and the gap 40 is 1.2X. It was molded to be 1.2 mm.
  • the cooling condition in the cooling bath 500 was set to ⁇ 10 ° C. using an ethylene glycol aqueous solution.
  • the optical fiber cable was used under the same conditions as in the first embodiment except that the cooling in the cooling device 300 was not performed and the surface temperature of the P ⁇ F 20 derived from the cooling device 300 was set to 20. Was manufactured.
  • An optical fiber cable was manufactured under the same conditions as in Comparative Example 1 except that a flame-retardant soft vinyl chloride resin (trade name: SHV9861N: manufactured by Riken Technos) was used as the jacket tube 50 and the melting temperature was 135.
  • a flame-retardant soft vinyl chloride resin trade name: SHV9861N: manufactured by Riken Technos
  • the loss increase (dBZkm) and oxygen index (LOI%) of the optical fiber cables of Example 1 and Comparative Example 12 were measured.
  • the loss increase was measured by the cutback method specified in JIS C-6823, and the oxygen index was measured by the method specified in JIS K7201. The results are shown in Table 1.
  • Example 1 From the results in Table 1, in Example 1, the melting temperature at 160 Even when molded at a predetermined temperature, there was no increase in loss, and an optical fiber cable excellent in flame retardancy as compared with Comparative Example 2 was obtained. On the other hand, in Comparative Example 1 in which the cooling step was not performed, the loss increased.
  • the optical fiber cable having the structure shown in FIG. 6 was manufactured by the apparatus shown in FIG. 7 using the same POF 20 and cooling device 300 as those used in Example 1, and the cooling conditions of the cooling device 300 were also the same as in Example 1. I made it. Aramide fiber (1270 decitex, using four fibers) was used as the fiber tensile strength member 60.
  • the thickness of the jacket tube 50 should be 0.5 mm and the outer diameter should be 2.6 mm. Molded.
  • an optical fiber cable was used under the same conditions as in the second embodiment, except that the cooling in the cooling device 300 was not performed, and the surface temperature of the POF 20 derived from the cooling device 300 was 20 ° C. Was manufactured.
  • An optical fiber cable was manufactured under the same conditions as in Comparative Example 3, except that a flame-retardant soft vinyl chloride resin (trade name: SHV9861N: manufactured by Riken Technos Co., Ltd.) was used as the jacket tube 51 and the melting temperature was 160 ° C. ,
  • Example 2 Yes-10 180 0 45 Comparative example 3 20 180 + 20 45 Comparative example 4 5 £ 20 160 0 28 According to the results in Table 2, in Example 2, even when the outer tube 51 was molded at a melting temperature of 180 ° C, there was no increase in loss, and the flame retardancy was superior to that of Comparative Example 4. An optical fiber cable was obtained. On the other hand, in Comparative Example 3 in which the cooling step was not performed, the loss increased. Industrial potential
  • the influence of heat on the POF can be significantly reduced by cooling the POF immediately before introducing it into the extrusion molding apparatus. Therefore, it is possible to mold the jacket tube at a higher temperature without increasing transmission loss, and it is possible to select a flame-retardant resin as the jacket tube, which is superior in flame retardancy.
  • An optical fiber cable can be provided.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de production de câble fibre optique permettant de mouler un tube gaine à des températures élevées sans augmenter les pertes de transmission. Dans ce procédé, on moule le tube gaine par extrusion sur la périphérie extérieure d'une fibre optique en plastique par l'intermédiaire d'un passage ou d'un matériau à l'aide d'un dispositif de moulage par extrusion, ledit tube gaine étant refroidi à l'aide d'un dispositif de refroidissement immédiatement avant l'introduction de la fibre optique en plastique dans le dispositif de moulage par extrusion.
PCT/JP2004/007652 2003-05-27 2004-05-27 Cable fibre optique et son procede de production WO2004107005A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005506548A JP4320660B2 (ja) 2003-05-27 2004-05-27 光ファイバケーブルの製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003148618 2003-05-27
JP2003-148618 2003-05-27

Publications (1)

Publication Number Publication Date
WO2004107005A1 true WO2004107005A1 (fr) 2004-12-09

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PCT/JP2004/007652 WO2004107005A1 (fr) 2003-05-27 2004-05-27 Cable fibre optique et son procede de production

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JP (1) JP4320660B2 (fr)
TW (1) TW200500676A (fr)
WO (1) WO2004107005A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115480351A (zh) * 2022-09-15 2022-12-16 四川天邑康和通信股份有限公司 一种室内隐形光缆及其制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08146259A (ja) * 1994-11-15 1996-06-07 Sumitomo Electric Ind Ltd プラスチック光ファイバコードの製造方法
JPH1096840A (ja) * 1996-09-25 1998-04-14 Sumitomo Electric Ind Ltd プラスチック光ファイバコードおよびその製造方法
JPH11337780A (ja) * 1998-05-29 1999-12-10 Asahi Glass Co Ltd 被覆プラスチック光ファイバの製造方法
JP2001124966A (ja) * 1999-10-27 2001-05-11 Mitsubishi Rayon Co Ltd プラスチック光ファイバケーブルの製造方法およびその装置、並びにプラスチック光ファイバの巻癖除去方法
WO2001051977A2 (fr) * 1999-12-24 2001-07-19 Mitsubishi Rayon Co., Ltd. Cable a fibres optiques et cable a fibres optiques pourvu d'une fiche
WO2001095002A1 (fr) * 2000-06-06 2001-12-13 Asahi Glass Company, Limited Cable a fibres optiques

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08146259A (ja) * 1994-11-15 1996-06-07 Sumitomo Electric Ind Ltd プラスチック光ファイバコードの製造方法
JPH1096840A (ja) * 1996-09-25 1998-04-14 Sumitomo Electric Ind Ltd プラスチック光ファイバコードおよびその製造方法
JPH11337780A (ja) * 1998-05-29 1999-12-10 Asahi Glass Co Ltd 被覆プラスチック光ファイバの製造方法
JP2001124966A (ja) * 1999-10-27 2001-05-11 Mitsubishi Rayon Co Ltd プラスチック光ファイバケーブルの製造方法およびその装置、並びにプラスチック光ファイバの巻癖除去方法
WO2001051977A2 (fr) * 1999-12-24 2001-07-19 Mitsubishi Rayon Co., Ltd. Cable a fibres optiques et cable a fibres optiques pourvu d'une fiche
WO2001095002A1 (fr) * 2000-06-06 2001-12-13 Asahi Glass Company, Limited Cable a fibres optiques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115480351A (zh) * 2022-09-15 2022-12-16 四川天邑康和通信股份有限公司 一种室内隐形光缆及其制备方法

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TW200500676A (en) 2005-01-01
JPWO2004107005A1 (ja) 2006-07-20

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