WO2004008215A1 - 光ファイバテープ心線およびその製造方法 - Google Patents
光ファイバテープ心線およびその製造方法 Download PDFInfo
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- WO2004008215A1 WO2004008215A1 PCT/JP2003/008909 JP0308909W WO2004008215A1 WO 2004008215 A1 WO2004008215 A1 WO 2004008215A1 JP 0308909 W JP0308909 W JP 0308909W WO 2004008215 A1 WO2004008215 A1 WO 2004008215A1
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- optical fiber
- core
- coating
- coating material
- molding
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Classifications
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- 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
- G02B6/448—Ribbon cables
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- 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
- G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
- G02B6/06—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres the relative position of the fibres being the same at both ends, e.g. for transporting images
- G02B6/08—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres the relative position of the fibres being the same at both ends, e.g. for transporting images with fibre bundle in form of plate
-
- 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
Definitions
- the present invention relates to a tape-shaped optical fiber ribbon obtained by integrating a plurality of optical fibers two-dimensionally arranged in parallel with each other by a coating layer, and a method for manufacturing the same.
- optical fiber ribbon in which a bundle of a plurality of optical fibers is integrated. Due to the advantage that a large number of optical fibers can be connected collectively, this optical fiber ribbon has been developed in recent years with the rapid introduction of subscriber-based optical fiber cables, which has led to the emergence of optical transmission media for optical communication systems. It is widely used.
- Optical fiber ribbons are required to have higher single-core separation and higher strength, and many companies are actively conducting research and development.
- a primary coating layer that integrates a plurality of optical fiber cores and a multi-layer that is covered with the primary coating layer. It has a two-layer structure of a secondary coating layer that integrates the core unit, and each of the coating layers is made of an ultraviolet curable resin having different strength and hardness.
- the optical fiber ribbon coated with the ultraviolet curable resin as described above is generally manufactured using an acrylic material.
- the hardness, durability, and flexibility are not sufficient, and for example, there is a problem that the twist of the optical fiber ribbon or the breakage of the optical fiber core easily occurs due to twisting.
- it has resistance to bending, but it is extremely weak to bending in the direction of the core wire, and the optical fiber ribbon may break or break. There was a problem that would happen.
- optical fiber tape coated with general UV curable resin The core wire has poor shape recovery due to plasticity caused by the material. If the core wire is wound around a bobbin or the like during storage, the wound state of the wound wire remains, that is, the optical fiber tape core curls. When the actual work, for example, connection or laying work to a connector or the like, is performed, handling is difficult due to this curl, and workability is deteriorated.
- the manufacturing of the optical fiber tape is generally performed by an apparatus shown in FIG.
- a plurality of optical fiber cores 2a to 2h are guided from the optical fiber supply device 16 to the optical fiber aligner 17 so that the optical fibers are arranged in parallel and in a line, and the aligned optical fibers are arranged.
- the fiber core is introduced into the coating jig 18, the coating material is filled in the coating jig 18, and the coating material is collectively coated around the optical fiber core.
- the material is extruded through holes, and then the coating material is cured by a curing means 19 such as an ultraviolet irradiation machine to produce an optical fiber ribbon.
- the coating jig 18 has an optical fiber insertion hole 18a into which the optical fiber cores 2a to 2h are inserted and a coating jig. It consists of a coating material reservoir 18b for filling the material, and an optical fiber discharge hole 18c from which the optical fiber core is discharged.
- the coating jig must always be filled with the coating material, which has the problem of reducing the material yield, and changing the thickness and width of the optical fiber tape.
- a new coating jig having a different hole for passing the optical fiber core wire was required, and the thickness and width of the optical fiber tape could not be easily changed.
- the optical fiber drawn from the optical connector or optical component be taped from the viewpoint of protection.However, it is difficult to tape the optical fiber with the above-mentioned conventional method. In addition, there is a problem that it is impossible to make a tape when the optical fiber is wired in a very narrow place.
- the present invention has been made to solve the above-mentioned problems in the conventional technology. That is, one of the objects of the present invention is to provide an optical fiber core having excellent strength, good flexibility, and hardly curled.
- An object of the present invention is to provide a method for manufacturing an optical fiber ribbon that can be supplied with a material and taped.
- Still another object of the present invention is to simplify the setting of a plurality of optical fiber cores, to reduce the waste of coating material, to perform short-distance or partial coating, and to provide optical fibers at one or both ends. It is an object of the present invention to provide a method of manufacturing an optical fiber ribbon which can also be used to tape a plurality of optical fiber cores on which optical components such as connectors are mounted. Disclosure of the invention
- the optical fiber ribbon according to the present invention is provided with an optical fiber core assembly in which a plurality of optical fiber cores are arranged two-dimensionally in parallel, and at least on one side of the optical fiber core assembly. And a coating layer made of silicone rubber.
- the hardness of the silicone rubber forming the coating layer is from 20 to 90 and the tensile strength is from 15 to 8 O kgf / cm 2 .
- the coating layer formed of silicone rubber may be provided on the upper and lower surfaces of the optical fiber core assembly, and may be provided on the side surface.
- “hardness” means “durome hardness” measured in accordance with the method specified in JIS K6253. That is, a 6 mm-thick test piece is made using silicone rubber, and the type A durometer is used to press the needle of the durometer so that no impact is applied from the vertical upper surface of the test piece, and read the scale. Means the value measured by this.
- Durome Itsuya is a tester that calculates the hardness from the pressing depth of the needle when pressed through a spring.
- the tensile strength in the present invention means “tensile breaking strength” measured in accordance with the method specified in JISK6251. That is, a JIS No. 2 dumbbell-type test piece with a thickness of about 2 mm was made using silicone rubber, and the test piece was pulled at a tension speed of 500 mm / min, and the load obtained when the test piece broke. The value [kgf / cm 2 ] calculated by dividing the value by the cross-sectional area of the test piece.
- the optical fiber ribbon according to the present invention is characterized in that a silicone rubber material having the above hardness and tensile strength is used as a coating material. Bending: There is no curling due to winding around bobbins, etc., making it extremely excellent in workability and handling.
- the method for manufacturing an optical fiber ribbon according to the present invention comprises the steps of:
- the present invention relates to a method for manufacturing the above-mentioned optical fiber ribbon by batch-coating a plurality of nozzles, the first aspect of which relates to a plurality of nozzles in which one or more nozzles are aligned in a two-dimensional plane. Close the surface of the optical fiber, and then move the nozzle relatively in the axial direction of the optical fiber while discharging the silicone rubber from the nozzle to collectively coat the plurality of optical fibers to form a coating layer. This is the feature.
- a second aspect of the method for producing an optical fiber ribbon according to the present invention is a molding jig having a molding groove after applying silicone rubber onto a plurality of optical fiber ribbons arranged on a two-dimensional plane. Are arranged in such a manner that the plurality of optical fiber cores are located in the molding groove or in the vicinity of the lower part of the molding groove, and are arranged in the axial direction of the optical fiber core. And forming a coating layer by molding silicone rubber.
- a third aspect of the method for producing an optical fiber ribbon according to the present invention relates to a molding method in which a plurality of optical fiber cores are arranged on a two-dimensional plane and a through-hole for supplying silicone rubber is provided.
- An optical fiber core is arranged in a state in which the molding jig having the groove is arranged so that the plurality of optical fiber cores are located in the molding groove or located close to below the molding groove.
- the optical fiber is moved relatively in the axial direction of the optical fiber, and silicone rubber is supplied into the molding groove from the through-hole to cover and mold the optical fiber core to form a covering layer.
- a fourth aspect of the method for manufacturing an optical fiber ribbon according to the present invention includes a step of aligning and placing a plurality of optical fiber ribbons on a two-dimensional plane; A step of applying cone rubber to cover a two-dimensional plane including a plurality of optical fiber cores with silicon rubber to form a coating layer, and peeling off a plurality of optical fiber cores from the two-dimensional plane. And separating only the coating layer on the optical fiber from the coating layer on the two-dimensional plane.
- silicone rubber having a hardness of 20 to 90 and a tensile strength of 15 to 80 kgf / cm 2 .
- FIG. 1 is a partially broken schematic plan view showing an example of a preferred embodiment of an optical fiber putty cord of the present invention.
- FIG. 2 is a schematic cross-sectional view of an optical fiber tape in which a coating layer is provided on one side of an optical fiber core assembly.
- FIG. 3 is a schematic cross-sectional view of an optical fiber tape in which a coating layer is provided on both sides of an optical fiber core assembly.
- FIG. 4 is a process chart illustrating a first embodiment of the method for producing an optical fiber ribbon according to the present invention.
- FIG. 5 is a perspective view of an example of a nozzle used in the method of manufacturing an optical fiber tape of the present invention.
- FIG. 6 is a side view of various nozzles used in the present invention.
- FIG. 7 illustrates another example of the first embodiment of the method for producing an optical fiber ribbon according to the present invention.
- FIG. 7 (a) is a side view
- FIG. 7 (b) is a front view. is there.
- FIG. 8 is a process chart for explaining still another example of the first embodiment of the method for producing an optical fiber ribbon according to the present invention.
- FIG. 9 is a process chart for explaining a second embodiment of the method for producing an optical fiber ribbon according to the present invention.
- FIG. 10 is a process chart for explaining a third embodiment of the method for producing an optical fiber ribbon according to the present invention.
- FIG. 11 is a process drawing of another example of the third embodiment of the method for producing an optical fiber ribbon of the present invention.
- FIG. 12 is a perspective view of a molding jig that can be used in FIG.
- FIG. 13 is a process drawing of another example of the third embodiment of the method for producing an optical fiber ribbon of the present invention.
- FIG. 14 is a process chart of an example of the fourth embodiment of the method for producing an optical fiber ribbon according to the present invention.
- FIG. 15 shows another example of the fourth embodiment of the method for producing an optical fiber ribbon according to the present invention. It is a process drawing of an example.
- FIG. 16 is a process drawing of another example of the fourth embodiment of the method for producing an optical fiber ribbon of the present invention.
- FIG. 17 is a process chart of still another example of the fourth embodiment of the method for manufacturing an optical fiber ribbon of the present invention.
- FIG. 18 is a process diagram for explaining the production of the optical fiber ribbon of the seventh embodiment.
- FIG. 19 is a process diagram for explaining the manufacture of the optical fiber ribbon of Example 11.
- FIG. 20 is a process diagram illustrating the production of the optical fiber ribbon of Example 12.
- FIG. 21 is a process diagram for explaining the manufacture of the optical fiber ribbon of Example 13.
- FIG. 22 is a process diagram for explaining a conventional method of manufacturing an optical fiber ribbon.
- FIG. 23 is a perspective view (a) and a cross-sectional view (b) of a conventional coating (forming) jig.
- the optical fiber ribbon 1 includes eight optical fiber cores 2a to 2h arranged in parallel with each other.
- a coating layer 3a or 3b made of silicone rubber having the above-mentioned characteristics is provided on the gap between them and on the upper surface or the upper and lower surfaces of the optical fiber.
- the coating layer 3a is formed on one side of a two-dimensional aggregate of optical fiber core wires arranged in parallel. It is okay to extend slightly over the sides.
- the optical fiber cores need only be arranged two-dimensionally in parallel with each other, and there may be a slight gap between adjacent optical fiber cores. The gaps may be equal or different from each other. Further, the gap may be filled with silicone rubber.
- the coating layer may be provided on both sides of a two-dimensional aggregate of optical fins and core wires arranged in parallel.
- eight optical fiber cores 2a to 2h arranged in parallel with each other are covered with a coating layer 3b made of silicone rubber so as to cover their outer circumferences, and It may be slightly overhanging.
- the optical fiber cores need only be arranged in parallel with each other, and there may be a slight gap between adjacent optical fiber cores. Further, the gap may be filled with silicone rubber.
- the silicone rubber forming the coating layer of the optical fiber ribbon of the present invention preferably has a hardness of 20 to 90 and a tensile strength of 15 to 80 kgf / cm 2.
- Yo Ri preferred correct Siri Kongomu is a 2 5-7 5 hardness, and Der those tensile strength 1 5 ⁇ 6 0 kgf / cm 2 is, good or properly to be La, hardness 3 0 ⁇ 65 and a tensile strength of 15 to 50 kgf / cm 2 .
- the silicone rubber is not particularly limited as long as the hardness and the tensile strength are within the above-mentioned ranges, and may be an addition reaction curing type, a condensation reaction curing type, or a vulcanization type. Either can be used. Among them, the addition-curable type and the condensation-curable type are preferred because they generate less by-products and have good workability.
- the thickness of the optical fiber ribbon may be appropriately selected according to the purpose of use.In general, when using an optical fiber of 25 ° m, the thickness of the optical fiber is 300 m including the optical fiber. ⁇ 480 m, preferably 330 m ⁇ 43 Q ju m More preferably, it is set in the range of 350 m 4 10 m.
- the width of the optical fiber ribbon may be appropriately selected according to the purpose of use. Usually, when eight 250 m optical fibers are arranged in parallel, the optical fiber is used. M, including the fiber core, is preferably set in the range of 250 m to 250 m.
- the number of optical fiber ribbons in the present invention is not particularly limited, and the number of optical fiber ribbons is not particularly limited, and four optical fiber ribbons including four optical fiber ribbons and eight optical fiber ribbons are provided.
- an optical fiber ribbon such as a two-core type or a 12-core type may be used.
- the optical fiber ribbon of the present invention having the above-described structure has sufficiently high strength, excellent flexibility, and curl resistance, and can be handled in the process of attaching and laying connectors.
- the optical fiber core wire is not broken and no curl occurs, so the reliability is high, and the work safety and work efficiency are improved.
- the optical fiber ribbon of the present invention has excellent single-core separation properties, the operation of separating the optical fiber ribbon can be performed easily and reliably.
- the optical fiber ribbon of the present invention is manufactured using silicone rubber as a coating material, but is preferably manufactured according to the first to fourth aspects.
- FIG. 4 The first embodiment of the method for manufacturing an optical fiber ribbon is shown in FIG.
- Fig. 4 first, the nozzle 4 is moved to the vicinity of the surface of the coating start position A of the plurality of optical fiber cores 2a to 2d aligned in parallel on the two-dimensional plane (Fig. 4 (a )).
- Fig. 4 (a ) Next, the nozzle 4 is moved in the axial direction of the optical fiber while discharging the coating material 3 from the hole 4a at the tip of the nozzle.
- the movement of the nozzle 4 may be performed by any means, for example, may be manual or automatic, but the movement speed can be controlled, and the movement and stop at a constant speed are possible. It is preferable to use a device. Note that the movement of the nozzle in the present invention may be relative, and any of the nozzle and the optical fiber core may be moved. Further, according to the present invention, since the coating material is applied by the nozzle, if there is a space into which the nozzle enters, it is possible to tape the optical fiber core wired in a very narrow space. .
- the nozzle used in the present invention is preferably cylindrical as shown in FIG.
- the material of the nozzle 4 is not particularly limited, but is preferably a material that does not corrode stainless steel, fluorinated resin, or the like, or that has low reactivity with chemical substances.
- the nozzle is used in connection with the coating material supply device.
- the material supply method of the coating material supply device any means can be used. For example, it may be manual or automatic, but it is preferable that the supply amount of the coating material can be controlled. No matter the shape of the hole 4a at the tip of the nozzle For example, the shape may be a circle, an ellipse, a rectangle, or the like. Further, any processing such as attaching a spatula-shaped component to the tip of the nozzle may be performed. Further, the diameter of the hole is not particularly limited as long as the coating material can be discharged and the hole can be discharged onto the optical fiber core wire.
- the number of nozzles used for applying the coating material 3 does not need to be one, and a plurality of nozzles may be present.
- FIG. 6 (a) illustrates a case where there are two nozzles (4 ', 4').
- a plurality of nozzles may be integrated, or a single nozzle may be provided with a plurality of holes.
- the nozzles may be arranged at an inclined angle with respect to a two-dimensional plane.
- the coating material is applied from both sides of a plurality of optical fiber core wires arranged in parallel. That is, the nozzles 4 and 4 'approach the upper and lower surfaces of a plurality of optical fiber core wires arranged in parallel, and each nozzle is moved in the optical fiber axial direction while discharging the coating material 3 from the hole at the tip of each nozzle. .
- a plurality of optical fibers are coated with silicone rubber on both sides.
- the optical fiber is covered from both upper and lower sides of the optical fiber. May be arranged in parallel in the vertical direction or the vertical direction, and coating may be performed from both left and right sides.
- a coating material for the back surface of an optical fiber is applied on a two-dimensional plane in advance on a peelable substrate to form a coating layer 3a.
- a plurality of optical fiber cores 2a to 2h are aligned and fixed thereon (Fig. 8 (b)).
- the coating material 3 is applied to the surface of the optical fiber core from the nozzle 4 to form a double-sided coating structure (Fig. 8 (c)).
- the position of the nozzle with respect to the plurality of optical fiber cores may be such that the coating material can be applied to all the optical fiber cores.
- the distance between the nozzle and the optical fiber core is What is necessary is just to select suitably the shape and thickness of a layer so that it may become desired.
- the stopping of the discharge of the coating material from the nozzle at the coating end position and the movement of the nozzle may be appropriately selected according to the tape shape and the purpose of use.For example, the discharge of the coating material from the moving nozzle is stopped. It is also possible to stop at the position and move the nozzle as it is to pass the coating end position.
- a required amount of coating material can be applied by using a nozzle, so that a good material yield can be achieved.
- an optical fiber ribbon can be manufactured.
- the relative movement speed and relative movement distance of the nozzle can be controlled, it is possible to supply the coating material even at a partial portion or a short distance portion of the optical fiber core wire.
- the coating material can be collectively coated at a desired distance with a desired tape width and thickness. Therefore, it is possible to tape necessary parts for strength, handling, etc.
- nozzle that is a very small coating jig
- multiple optical fins drawn from optical components or optical connectors, core wires, or multiple wires wired in a narrow space are used. Even in the case of a number of optical fiber cores, it is possible to coat all at once.
- the second embodiment of the method for manufacturing an optical fiber ribbon is to first form a plurality of optical fiber cores (four in the figure) 2 a to 2 d on a two-dimensional plane of a substrate 5. Arrange them and fix their ends with adhesive tape 6. Then, a coating material 3 is applied on the optical fiber core in advance (FIG. 9 (a)). Next, the molding jig 7 provided with the molding groove 7a on the bottom is lowered from above the plurality of optical fiber cores 2a to 2d, and the plurality of optical fiber cores are used for molding the molding jig.
- the optical fiber core may be moved without moving the molding jig.
- the optical fiber core is arranged so as not to be in the molding groove of the molding jig 7 but to be located below and below the molding groove, and in this state, the molding jig 7 is moved to the axis of the optical fiber core. It may be moved in the direction.
- the shape of the silicone rubber coating layer is regulated by the molding groove of the molding jig, and the coating layer is formed in a state of being molded from the coating start position A (FIG. 9 (c)).
- the molding jig is moved to the coating end position B to complete the formation of the silicone rubber coating layer (Fig. 9 (d)). Thereafter, the formed silicone rubber coating layer is dried or cured as necessary.
- the plurality of optical fiber cores are placed on a plane in the molding groove of the molding jig or on a plane below the molding groove of the molding jig close to the plane. Positioning the optical fiber completes the setting of the optical fiber at the start of optical fiber ribbon production. Therefore, the setting of the optical fiber for making the tape can be performed very easily and in a short time. Furthermore, since the coating material is formed simply by moving the forming jig having a simple structure having only a forming groove in the axial direction of the optical fiber, the tape can be easily formed. be able to.
- FIG. 10 a third embodiment of the method for manufacturing an optical fiber ribbon will be described with reference to the drawings.
- a plurality of optical fiber cores (four in the figure) 2 a to 2 d are arranged on a two-dimensional plane, as in the case shown in FIG.
- the molding jig 7 having a molding groove 7a on the bottom surface and a through hole 7b for supplying the coating material is lowered from above the plurality of optical fiber core wires, and The optical fiber core is placed on a flat surface such that it is located in the molding groove of the molding jig (Fig. 10 (a)).
- the optical fiber core may be arranged so as not to be located in the molding groove of the molding jig 7 but to be located below and close to the molding groove.
- the forming jig 7 is moved in the axial direction of the optical fiber, and when the forming jig reaches a predetermined position, that is, a coating start position A, a coating material supply device (not shown) is connected via a pipe 8. Supply the coating material to the through-holes 7b, start discharging the coating material, and do not supply the coating material 3.
- Move the molding jig (Fig. 10 (b)).
- the coating end position B the discharge of the coating material is stopped, and the coating and molding of the optical fiber core are completed (Fig. 10 (c)).
- the molding jig is moved, but the optical fiber core may be moved.
- the formed silicone rubber coating is then dried or cured as desired.
- FIG. 11 is a process diagram of another example of the third embodiment of the method of manufacturing an optical fiber ribbon according to the present invention.
- unaligned optical fiber cores are aligned.
- Coating is performed while. That is, a plurality of optical fiber cores are aligned on one end of optical fiber cores 2 a to 2 d which are arranged on a two-dimensional plane but are not aligned, and are fixed with adhesive tape 6 and aligned.
- the molding jig 7 is placed on the part (Fig. 11 (a)). When the forming jig is moved to reach the coating start position A, the coating material is supplied to the forming jig 7 via the pipe 8 to start coating forming.
- the unaligned optical fiber cores are aligned by the molding jig's movement by the molding groove 7a having a rectangular cross section of the molding jig, and a coating material is supplied thereon to perform coating molding. (Fig. 11 (b)).
- the coating end position B When the molding jig reaches the coating end position B, the discharge of the coating material is stopped, and the coating molding of the optical fiber core is completed (Fig. 11 (c)).
- the molded silicone rubber coating layer is dried or cured as desired.
- a molding jig having a structure shown in FIGS. 12 (a) and 12 (b) can be mentioned.
- the forming jig shown in FIGS. 12 (a) and 12 (b) is different from the forming jig shown in FIG. 10 in that the through-hole 7b is located almost at the center in the length direction of the forming jig.
- the cross-sectional shape of the molding groove 7a is rectangular. Therefore, when this molding jig is used, the optical fibers can be aligned.
- the alignment means that the coating material is applied to the optical fiber and the optical fiber core before application, so that the movement of the optical fiber core is controlled so that the coating material can be applied.
- the molding jig used in this case is, as shown in Fig. 12 (a), a part of the molding groove having a rectangular cross section located in front of the through hole for discharging the coating material, and A machine that regulates movement and aligns optical fibers It has a function.
- the forming jig shown in Fig. 12 (b) has two feet 7f 7f at the same or slightly wider interval as the width of the forming groove, and has the function of aligning and arranging optical fibers. It has become something.
- FIG. 13 is a process chart of still another example of the third embodiment, and shows a case where an optical fiber ribbon having a double-sided covering structure is produced. That is, first, a coating material for the back surface is applied on a two-dimensional plane to form a coating layer 3a (FIG. 13 (a)), and a plurality of optical finos and a core (4 in FIG. 13) are formed thereon. *) Arrange and arrange 2a to 2d (Fig. 13 (b)) o Then, move the molding jig 7 with through holes into the optical fiber cores 2a to 2d. The coating material is placed so as to fit in the molding groove (Fig. 14 (c)), and the coating material is supplied to the molding jig through the pipe 8 to perform coating and molding, whereby both sides are made of silicone rubber. An optical fiber ribbon coated with the covering layer 3b is formed (Fig. 13 (d)).
- the application and molding of the coating material can be performed in one step by one molding jig.
- the supply position and supply amount of the coating material from the coating material supply device it is possible to prevent the supply of excess coating material, improve the material yield of the coating material, and improve the tape width and thickness. Can be set arbitrarily.
- the relative movement speed of the molding jig the tape width and thickness can be set arbitrarily.
- the relative movement distance of the molding jig it is possible to tape the optical fiber core for a short distance, or to partially tape the optical fiber core at an arbitrary position.
- “relative” means that either the forming jig or the arranged optical fiber core may be moved.
- the forming jig used in the manufacturing method of the second and third aspects is a member having a forming groove, which is appropriately selected and used according to the purpose of use of the optical fiber ribbon. Good.
- the cross-sectional shape of the forming jig may be appropriately selected depending on the forming shape of the coating material and its specifications, and is not particularly limited. Examples thereof include a semi-elliptical shape, a rectangular shape, and a semi-circular shape. Is raised.
- the molding jig may have an integrated structure made of a single substance, It may have a structure in which individual parts are combined.
- the height, width, and length of the forming groove of the forming jig may be appropriately selected, and the height in the forming jig does not need to be constant.
- the height may be changed.
- the position of the forming groove in the width direction of the forming jig is not particularly limited, and may be provided at any position within the width of the forming jig.
- the number of forming grooves provided in the forming jig does not need to be one.For example, in order to manufacture a plurality of optical fiber ribbons at one time, a plurality of forming grooves are formed in one forming jig. A groove may be provided.
- the tip of the molding groove may be chamfered so that the optical fiber core wire is easily introduced into the molding groove of the molding jig.
- two legs are provided at the same or slightly wider interval as the width of the molding groove, thereby regulating and aligning the optical fiber (FIG. 12 (b)), and It is also possible to use a groove having a structure in which the width of the molding groove is slightly widened in a tapered shape on the optical fiber entrance side.
- the size of the molding jig is not particularly limited, and may be appropriately selected according to the purpose of use, for example, the number of optical fiber ribbons, and the shape is not particularly limited. For example, a shape such as a semi-cylindrical shape or a rectangular parallelepiped shape can be given.
- the material forming the forming jig is not particularly limited, but, for example, a material having a low coefficient of friction, such as a polyacetal resin, or a material that is unlikely to be thermally deformed, has good mechanical properties.
- the shape of the through-hole provided in the forming jig may be appropriately selected and used according to the purpose of use, and may have any shape. For example, a circle, an oval, a rectangle, and the like can be given. Also, the number of through holes need not be one, but may be plural. Further, the size of the through-hole is not particularly limited as long as the coating material can be supplied and the coating material can be applied onto the optical fiber core wire. Furthermore, the position of the through-hole may be any position as long as it penetrates the molding groove, and the direction of the through-hole is flat. It does not need to be perpendicular to, and may have an inclination angle.
- the movement of the optical fiber is restricted to the portion in front of the through hole that supplies the coating material, and the optical fiber is moved. It is necessary to have a structure in which the cords are aligned. In such a case, it is preferable to have a structure that regulates the lateral movement as well as the vertical movement of the optical fiber core wire.
- the molding groove having a rectangular cross section as described above Those having the following.
- the forming jig needs to be movable up, down, left and right with respect to the optical fiber core.
- the operation can be performed manually, it is more preferable to use a device that performs mechanical and automatic operations in order to precisely form the coating of the optical fiber ribbon.
- Any device can be used as a device for moving the forming jig in the axial direction of the optical fiber core wire as long as the forming jig can be moved at a constant speed in one axial direction, but any position can be used. It is more preferable that the starting and stopping can be performed from the beginning and that the moving speed is variable.
- a moving device in which a molding jig is attached to a single-shaft control port bottle can be used. Thereby, the moving position and the moving speed can be controlled.
- a device capable of controlling both the supply amount of the coating material and the relative moving speed of the molding jig By changing the supply amount of the coating material and the relative moving speed of the molding jig during the tape formation, it is possible to manufacture an optical fiber tape having a partially different shape, and The tape width and thickness can be increased or increased where necessary for strength, protection, etc.
- a device capable of controlling the relative movement distance in addition to the control of the supply amount of the coating material and the relative movement speed of the molding jig.
- the molding jig may be one that can change its height in the vertical direction during the movement of the molding odor in the optical fiber axial direction. As a result, the thickness and shape of the optical fiber tape to be manufactured are changed, Can be manufactured. It is more preferable that the jig can be automatically moved in the vertical direction.
- any means may be used. It may be manual, but from a control point of view it is preferably mechanical and automatic. For example, it is preferable that the start and end of supply be automatically performed from the viewpoint of tape formation at an arbitrary position, and the supply amount is controlled from the viewpoint of improving the yield of the coating layer made of silicone rubber and controlling the shape such as thickness. Control becomes possible.
- the fourth embodiment of the method for manufacturing an optical fiber ribbon according to the present invention is as follows. First, a plurality of optical fiber cores (four in the figure) are placed on a substrate 5 having a two-dimensional plane. a to 2d are arranged in a line, and a coating material 3 is applied to a two-dimensional plane of the substrate so that a desired area of the optical fiber cores 2a to 2d is covered (see FIG. 1 4 (a)). Next, while holding the ends of the uncoated optical fibers, the optical fibers are peeled from the substrate (Fig. 14 (b)).
- the coating layer extends along the axial direction of the optical fiber core between the coating layer made of silicone rubber on the side of the outermost optical fiber cores 2a and 2d and the coating layer on the substrate.
- the fibers are split and separated to form a coated optical fiber ribbon 1 (Fig. 14 (c)).
- the optical fiber cores are simply arranged and placed on a two-dimensional plane, and the coating material may be applied thereon.
- Optical fiber cores do not need to be precisely aligned, and even if the number of cores is increased, there is no variation in the thickness direction of the optical fiber cores, making it possible to manufacture optical fiber tape cores in a stable manner. it can.
- the application range is not limited, and even if the distance is very short, the coating material may be applied to the surface of the optical fiber core. It is also easy to produce an optical fiber core.
- the optical fiber core in the step of coating the two-dimensional plane with the silicon rubber, may be coated so as to form a silicon rubber coating layer with a constant thickness on the surface thereof.
- Coating method is limited is not.
- a coating material is applied to a plurality of optical fiber cores arranged in alignment with a two-dimensional plane of a substrate, and then a molding jig having a flat bottom surface is moved from a coating start position to a molding jig. It may be moved to the coating end position, and the thickness of the optical fiber and silicone rubber on the surface of the core wire may be made constant by the bottom surface of the forming jig. Thereby, the silicone rubber can be coated with a uniform thickness.
- the height of the molding jig may be adjusted so that the thickness of the silicone rubber becomes a desired value.
- the coating material may be thickly applied on the optical fiber in advance, and the forming jig may be moved to spread the coating material on the two-dimensional plane of the substrate including the optical fiber.
- the application of the coating material and the movement of the molding jig may be linked, and the application and the molding may be performed simultaneously by using a jig that performs the application and the molding at the same time.
- the moving speed and moving direction at the time of peeling and the angle between the optical fibers and the substrate change the shape of the coating layer due to the movement. What is necessary is just to set so that peeling is not performed, and the method is not particularly limited. However, in order to keep the shape of the coating layer constant, it is preferable to keep the moving speed during peeling constant.
- a part thereof is peeled off to produce an optical fiber core.
- a part of optical fiber, "cores 2a and 2b may be peeled off from a two-dimensional plane to form optical fiber core 1. It is also possible to manufacture other optical fiber tape cores by stripping the cores 2c and 2d (Fig. 15 (b) and (c)).
- the fiber is cured and dried according to the requirements, either before or after the optical fiber is peeled off from the two-dimensional plane, or during the curing and drying.
- the curing and drying process does not affect the alignment of the optical fiber core. It can be done in stages.
- the coating of the optical fiber ribbon may have a multilayer structure.
- FIG. 16 shows a case where an optical fiber ribbon having a two-layered structure is produced.
- the optical fiber ribbons 1a and 1b produced according to the first to fourth embodiments are shown. Are placed on a two-dimensional plane (Fig. 16 (a)), and after coating material 3 is applied on them (Fig. 16 (a)).
- an adhesive layer may be provided on the two-dimensional plane.
- the optical fiber When the optical fiber is placed on a two-dimensional plane, it is temporarily fixed by an adhesive layer. Therefore, the optical fiber core can be easily set in a shorter time without the necessity of alignment for the optical fiber and the core during the coating and molding.
- the presence of the adhesive layer increases the adhesive force to the coating material, so that the coating layer is split along the axial direction of the optical fiber core. Separation and shrinkage can also improve product yield. Further, it is easy to adjust the pitch interval between the optical fibers.
- the adhesive used for the adhesive layer is to maintain the shape of the optical fiber core, not to apply stress distortion to the optical fiber core due to bonding, and to damage the optical fiber core during peeling.
- Any material can be used as long as it has an adhesive strength that does not have any degree, such as urethane-based, acrylic-based, epoxy-based, nylon-based, phenol-based, polyimide-based, vinyl-based, etc.
- Various pressure-sensitive adhesives (adhesives) such as silicone-based, rubber-based, fluorinated epoxy-based, and fluorinated acrylic-based adhesives, thermoplastic adhesives, and thermosetting adhesives can be used.
- a pressure-sensitive adhesive and a thermoplastic adhesive are preferably used because of the ease of wiring the optical fiber.
- the method of attaching a plurality of optical fibers to the adhesive layer is as follows. Any method may be used, and an automatic wiring device that can be attached to the adhesive layer with a constant pressure may be used. Further, the adhesive layer may have an effect of deactivating the adhesive force when the adhesive layer is peeled off, for example, by applying a solvent or by irradiating light so as to easily peel the optical fiber core wire from the adhesive layer. I do not care.
- a groove for aligning optical fibers may be provided on the two-dimensional plane of the substrate.
- FIG. 17 shows a case where an optical fiber ribbon is manufactured using a substrate provided with a groove in the manufacturing method according to the fourth embodiment.
- the substrate 5 having a two-dimensional plane is provided with a groove 5a for aligning the optical fibers, and a plurality of optical fibers (2a to 2d) are arranged in the groove (FIG. 1). 7 (a)).
- the coating material 3 is applied, and if necessary, a silicone rubber coating layer is formed by a forming jig similar to the above. ( Figure 17 (b)). Thereafter, the optical fiber core is peeled from the substrate (FIG.
- the lateral direction of the optical fiber cores can be regulated, aligned and fixed by simply positioning a plurality of optical fiber cores in the two-dimensional flat groove.
- the grooves in the two-dimensional plane need only be capable of aligning and fixing the optical fiber core wires, and the width and depth of the grooves may be determined according to the specifications of the optical fiber tape to be manufactured.
- the cross-sectional shape of the groove is not particularly limited, and may be a V-shaped or semi-circular form other than a rectangle.
- the alignment of the optical fibers means that the optical fibers are arranged and arranged at desired positions, and the intervals between the optical fibers are equal to each other. It does not have to be provided, and may be set as appropriate according to the specifications of the optical fiber ribbon to be manufactured. Further, the covering of the optical fiber core is not particularly limited as long as at least the surface of the optical fiber core to be taped is covered with silicone rubber. Alternatively, a bundle of optical fiber cores may be placed in parallel, and a plurality of bundles of optical fibers and cores may be applied at the same time.
- peel off the optical fiber Separation means that the optical fiber core and the two-dimensional plane are relatively separated from each other, and either the optical fiber core or the two-dimensional plane may be moved.
- each of the optical fiber cores arranged in a two-dimensional plane only needs to be at least partially arranged in the same plane, and the optical fiber cores intersect. There may be a part to do.
- the number of cores of the optical fiber cores to be coated at one time is not limited at all, and two cores, four cores, six cores, and eight cores are used. It is possible to manufacture single-core fiber and 16-core tape. Example
- the work to separate the optical fiber tape into a single fiber optic fiber core was performed on 500 mm of the optical fiber tape, and the workability in that case was evaluated.
- the appearance of the optical fiber ribbon was evaluated. Specifically, a microscope was used to observe for damage such as cracks in the optical fiber tape cores and peeling of the coating layer.
- the optical fiber ribbon (380 mm) is wound twice around a 60 mm diameter bobbin, left for 1 hour, then released, and the degree of warping at both ends of the optical fiber ribbon from the flat table was evaluated.
- the optical fiber ribbons of Examples 1 to 6 of the present invention exhibited excellent single-core separation properties, exhibited sufficient tensile strength, and further exhibited curling due to curling. The outbreak has been eliminated as much as possible.
- an 8-core optical fiber ribbon having the structure shown in FIG. 3 (b) was similarly manufactured and evaluated, and the same results as shown in Table 2 were obtained.
- the coating device shown in Fig. 18 using four 25 cm long optical fiber cores 2 a to 2 d (Furukawa Electric, quartz single-mode optical fiber, outer diameter 0.25 mm)
- an optical fiber ribbon having a length of 20 cm, a thickness of 0.4 mm, and a width of 1.1 mm was produced.
- the coating device used is composed of a single-axis control robot and a coating material supply device for supplying the coating material to the nozzle.
- the single-axis control robot 9 is used for placing an optical fiber.
- a ball screw shaft 11 is disposed along the longitudinal direction, a drive motor 14 is provided at one end, and the other end is supported by a bearing 15.
- a movable unit 12 was screwed into the ball screw, and the movable unit 12 had a nozzle 4 installed perpendicular to the stage surface.
- the nozzle is movable in the vertical and horizontal directions, and is configured to be fixed at a predetermined position.
- a flexible pipe 8 was connected to the nozzle, and the coating material was supplied from the coating material supply device 13.
- As the nozzle 4 a stainless steel dispenser needle (outer diameter 1.2 mm, inner diameter 0.9 mm) was used.
- the moving speed of the movable unit 12 of the single-axis control robot 9 was set to 50 mm / sec, and the discharge pressure of the coating material supply device 13 was set to 5.0 kg / cm 2 .
- the discharge of the coating material 3 was started.
- the coating material was applied onto the optical fiber and the optical fiber by moving the nozzle 4 in the optical fiber axial direction (FIG. 18 (b)).
- the discharge of the coating material was stopped (Fig. 18 (c)).
- the coating material was cured by treating the optical fiber tape at 150 ° C. for 1 hour.
- optical fiber tape core wire had good single-core separability, and did not peel off and did not curl after ten twists.
- optical fiber ribbon was produced in the same manner as in Example 7, except that the moving speed between the optical fiber central portions 10 cm was changed to 35 mm / sec.
- the obtained optical fiber ribbon has a central part width of 1.2 mm and a thickness of 0.55 mm, which is larger than other parts (width l mm, thickness 0.4 mm).
- the optical fiber ribbon has a good single-core separation property, and does not peel off and does not curl after 10 twists. won.
- the strength of the optical fiber ribbon was increased, and the optical fiber ribbon was not damaged by sudden bending or the like, and had sufficient strength.
- the method shown in the flowchart of FIG. 9 was performed to produce a 4 mm optical fiber putty ribbon.
- the molding jig was moved manually.
- the molding jig has a width (L) of 40 mm, a length (S) of 30 mm, and a height (H) of 40 mm. In the center in the width direction, the width (w) is 1.
- a semi-elliptical molding groove having a height of 1 mm and a height (h) of 0.4 mm was used.
- the coating material, hardness 8 4, tensile strength 4 5 kgf / cm 2 for thermosetting silicon Kongomu resin TSE 3 2 8 1 - G , GE Toshiba shea recone Inc.
- optical fiber cores 2a to 2d are aligned in parallel on the substrate 5 of the optical fiber putty fiber core manufacturing apparatus, and both ends of the uncoated optical fiber are fixed with adhesive tape 6.
- the coating material was applied to the surface of four optical fibers in a range of 60 cm to be fixed and then taped, and the surface of the coating material was lightly leveled with a spatula (Fig. 9 (a)).
- the molding jig 7 was placed on the substrate such that the four optical fibers were located in the molding grooves 7a of the molding jig (FIG. 9 (b)). Then, the molding jig was moved from the coating start position A to the coating end position B in the optical fiber axial direction. ( Figure 9 (c) and (d)). Thereafter, the formed coating material was cured under the condition of 150 ° C.-hour to produce a four-core optical fiber tape.
- the obtained optical fiber tape had good single-fiber separability, and did not peel or curl after ten twists.
- the setting of the optical fiber core is only required to insert the optical fiber core set on the substrate into the molding groove of the molding jig.
- the operation is easy and the work efficiency has been improved.
- the obtained optical fiber ribbon has a tape width of 1.2 mm and a thickness of 0.35 mm, which is almost the same as the set value. It was the desired shape.
- Example 11 1-90 cm long optical fiber core wire (manufactured by Furukawa Electric, quartz single-mode optical fiber, outer diameter 0.25 mm), length 70 cm, width 1.
- An optical fiber ribbon having a thickness of lmm and a thickness of 0.4 mm was manufactured by the manufacturing process shown in FIG.
- the coating equipment used for the manufacture had the configuration shown in Fig. 19. That is, the coating device has a single-sided substrate having a side wall, a flat substrate 10 on which an optical fiber core is placed, and a pole screw shaft 11 having a drive motor 14 at one end and a bearing 15 at the other end. It is composed of a control robot 9 and a coating material supply device 13 that can control the supply amount of the coating material.
- the drive motor and the bearing are fixed to the side wall, and the forming jig 7 is connected to the ball screw shaft 11.
- the movable unit 12 is screwed into the movable unit 12 so as to be vertically movable with respect to the substrate. Therefore, the molding jig can be moved vertically and horizontally by the movable unit 12.
- a dispenser was used as the coating material supply device 13, and a thermosetting silicone rubber resin having a hardness of 84 and a tensile strength of 45 kgf / cm 2 was used as the coating material. (TSE 3281-G, manufactured by GE Toshiba Silicone Co., Ltd.).
- the forming jig used in this embodiment has the same size as that in the tenth embodiment.
- a circular through hole with a diameter of 2 mm penetrates the molding groove.
- a flexible pipe 8 was attached to the through hole, and the coating material was supplied from the coating material supply device 13.
- the through hole of the forming jig reached the coating end position B, the supply of the coating material was stopped, and the forming jig was further moved to complete the coating and forming work (Fig. 19 (d)). Thereafter, the formed coating material was cured under the condition of 150 ° C.-hour to prepare a four-core optical fiber tape.
- the obtained optical fiber tape had good single-core separability, and did not peel off or curl after ten twists.
- the setting of the optical fiber core is performed by simply inserting the optical fiber core set on the substrate into the molding groove of the molding jig.
- the operation is easy and the work efficiency has been improved.
- coating and molding can be performed simultaneously with a molding jig with a very simple structure. did it.
- the supply amount of the coating material can be controlled, the excess coating material is not supplied, so that the material yield is improved, and the tape is formed by coating only a predetermined portion. I was able to. Therefore, the obtained optical fiber ribbon has a tape width of 1.1 mm and a thickness of 0.4 mm, which is almost the same as the set value, and the desired tape shape has a substantially semi-elliptical cross section. Was something.
- An optical fiber ribbon having a thickness of 0.4 mm was manufactured by the manufacturing process shown in FIG.
- the coating device used in the manufacture was the same as that used in Example 11 except that the forming jig 7 was a rectangular shape having a width of 1.1 mm and a height of 0.4 mm at the center in the width direction.
- a groove having a shape was provided, and a through-hole having a diameter of 2 mm was provided at the center of the groove in the longitudinal direction.
- a four-core optical fiber ribbon was manufactured in the same manner as in Example 11.
- the setting of the optical fiber core is only required to put the optical fiber core, which has been stood on a flat substrate, into the molding groove of the molding jig. It's simple and work efficiency has improved.
- the optical fiber can be formed with a very simple structure. The coating and molding could be performed simultaneously while aligning the. Since there is no need to arrange optical fibers in parallel, the work efficiency for setting optical fibers has been further improved. Further, since the supply amount of the coating material can be controlled, the excess coating material is not supplied, so that the material yield is improved. Was able to be transformed.
- the obtained optical fiber ribbon is almost the same as the set value of the tape width of 1.1 mm and the thickness of 0.4 mm, and the desired tape shape is almost rectangular in cross section. there were.
- the optical fiber ribbon had good single-fiber separation, and did not peel off and did not curl after ten twists.
- the coating apparatus used in the production of this example had the structure shown in FIG. That is, a single-axis control having a flat substrate 10 on which a substrate 5 on which an optical fiber core is placed is arranged, a ball screw shaft 11 having a drive module 14 at one end and a bearing 15 at the other end.
- the forming jig 7 is 40 mm in width, 30 mm in length and 40 mm in height, has a flat bottom surface, and has a movable unit 12 attached to a ball screw shaft 11 and a board. On the other hand, it was installed vertically. Therefore, the movable unit 12 can move the forming jig vertically and horizontally.
- the obtained optical fiber tape was further treated under the condition of normal temperature for 1 hour to completely cure the coating material to obtain a four-core optical fiber tape.
- the obtained optical fiber tape core wire had good single-core separability, and did not peel off and did not curl after 10 twists.
- the optical fiber ribbon can be formed very easily, the manufacturing time can be reduced as compared with the conventional manufacturing method.
- the optical fiber ribbon could be produced without waste, and the yield of the optical fiber and the coating material was good. Further, the obtained optical fiber ribbon had a uniform thickness of 0.35 mm.
- Example 14 Using two optical Fuaibatepu core prepared in Example 1 3, arranging it in parallel, a covering material hardness 8 4, tensile strength 4 5 kgf / cm 2 for thermosetting silicon Kongomu (GE Toshiba Using TSE3281-G) manufactured by Silicone Co., Ltd., an eight-core optical fiber cable with a length of 30 cm and a two-layer structure integrated by batch coating was manufactured. The same molding apparatus and molding jig as in Example 13 were used.
- optical fiber tape cores obtained in the same manner as in Example 13 were arranged in parallel on a substrate.
- a coating material was applied to the surface of the two optical fiber ribbons.
- the movable unit is moved so that the bottom of the molding jig is placed at a height of 0.05 mm from the surface of the two optical fiber ribbons, and the moving speed is SO mmZs ec.
- the core was moved in the axial direction.
- the molded coating material was semi-cured at a curing temperature of 150 ° C. and a curing time of 30 minutes.
- the optical fiber core wire at one end was held by hand, and pulled up, thereby separating the optical fiber core wire from the substrate.
- the obtained eight-core optical fiber tape was treated at 150 ° C. for one hour, and the coating material was completely cured to obtain a two-layered eight-core optical fiber tape.
- the obtained optical fiber tape had good single-fiber separability, and did not peel off or curl when twisted 10 times.
- a two-layered optical fiber ribbon can be manufactured by the same apparatus and method as in Embodiment 13, and there is no need to change the jig used for manufacturing as in the conventional case.
- the work efficiency was good and the production was possible at low cost.
- the obtained optical fiber ribbon had a uniform thickness of 0.4 mm.
- Example 13 Except for using a substrate having a rectangular groove of 0.1 mm in depth and 1.1 mm in width, four optical fibers of 40 cm in length and four cores were used as in Example 13 Thus, an optical fiber ribbon was manufactured. Since the alignment of the optical fiber cores can be performed only by placing the optical fiber cores in the grooves, the optical fiber cores can be set without precise alignment, and the work time can be reduced. Was. In addition, work can be performed easily, improving work efficiency.
- the optical fiber ribbon of the present invention has both sufficiently high strength and flexibility, and has extremely excellent characteristics in that it is hardly curled. Therefore, the optical fiber core wire is not damaged and no curl occurs during the connector installation and laying work, so the reliability is improved, and the work safety and work efficiency are improved. Further, according to the method for manufacturing an optical fiber ribbon of the present invention, a plurality of optical fibers are collectively coated and molded at an arbitrary position using a nozzle and a molding jig having a simple structure. It can be easily taped.
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
Description
Claims
Priority Applications (4)
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AU2003281106A AU2003281106A1 (en) | 2002-07-15 | 2003-07-14 | Optical fiber tape core and production method therfor |
EP03741378A EP1548477A4 (en) | 2002-07-15 | 2003-07-14 | FIBER OPTIC BELT AND MANUFACTURING METHOD THEREFOR |
US10/521,218 US7286737B2 (en) | 2002-07-15 | 2003-07-14 | Optical fiber tape core and production method therefor |
US11/827,510 US7502536B2 (en) | 2002-07-15 | 2007-07-12 | Optical fiber tape core and production method therefor |
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JP2002-205330 | 2002-07-15 | ||
JP2002205330A JP4172626B2 (ja) | 2002-07-15 | 2002-07-15 | 光ファイバテープ心線 |
JP2002-329030 | 2002-11-13 | ||
JP2002329030A JP4005480B2 (ja) | 2002-11-13 | 2002-11-13 | 光ファイバテープ心線の製造方法 |
JP2003028982A JP3899321B2 (ja) | 2003-02-06 | 2003-02-06 | 光ファイバテープ心線の製造方法 |
JP2003-28982 | 2003-02-06 |
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- 2003-07-14 EP EP10005759A patent/EP2226663A1/en not_active Withdrawn
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Also Published As
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KR20050042775A (ko) | 2005-05-10 |
EP2237092A1 (en) | 2010-10-06 |
US7502536B2 (en) | 2009-03-10 |
EP1548477A4 (en) | 2010-03-31 |
KR100671119B1 (ko) | 2007-01-17 |
AU2003281106A1 (en) | 2004-02-02 |
US7286737B2 (en) | 2007-10-23 |
EP1548477A1 (en) | 2005-06-29 |
US20070258685A1 (en) | 2007-11-08 |
EP2226663A1 (en) | 2010-09-08 |
US20050117859A1 (en) | 2005-06-02 |
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