JP2016075746A - Intermittent type optical fiber tape core wire and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intermittent type optical fiber core wire which improves cable manufacturability and single core separability and the manufacturing method thereof in the intermittent type optical fiber tape core wire intermittently formed with a connection part and a non-connection part along the longitudinal direction between optical fiber core wires.SOLUTION: An intermittent type optical fiber tape core wire 1 includes a plurality of optical fiber core wires arranged in parallel (for example, two single optical core wires 11 are arranged in parallel). A connection part 13 and a non-connection part 14 are intermittently formed along the longitudinal direction between the neighboring optical fiber core wires. The periphery of the optical fiber core wire is applied with a coating resin 12. The connection part 13 is connected by a connecting resin high in adhesion force per unit area with the coating resin 12 as compared with the adhesion force per unit area between the optical fiber core wire and the coating resin 12.SELECTED DRAWING: Figure 1A

Description

  The present invention relates to an intermittent optical fiber ribbon in which a connecting portion and a non-connecting portion are intermittently formed along the longitudinal direction between optical fiber cores, and a manufacturing method thereof.

  2. Description of the Related Art Conventionally, there has been proposed an optical fiber tape core (hereinafter, also referred to as a tape core) in which a plurality of optical fiber single cores are integrated in a parallel row. For example, in Patent Document 1, a plurality of thin optical fiber strands having an optical fiber bare wire outer diameter of less than 125 μm and a strand covering layer outer diameter of less than 250 μm, with a predetermined interval therebetween. A tape core wire is disclosed which is arranged side by side and covered with a batch coating layer.

  Patent Document 2 discloses a tape optical fiber in which a plurality of optical fiber single optical fibers are arranged in parallel and the periphery of the optical fiber single optical fibers is integrated by a jacket over the entire length, and adjacent optical fibers There is disclosed a tape core wire in which a recess is formed in the outer jacket according to a depression between single core wires.

  In Patent Document 3, a plurality of tape core wires coated in a lump are arranged in a planar shape so that a recess is formed in a recess between adjacent optical fiber strands, and a gap between adjacent tape core wires is formed by a connecting resin. The unit type | mold tape core wire connected so that a recessed part may be formed is disclosed.

  Further, Patent Document 4 discloses a tape core wire (hereinafter also referred to as an intermittent tape core wire) in which adjacent optical fiber single core wires are intermittently connected in the longitudinal direction. Such an intermittent type tape core wire can improve the storage property to an optical cable and the single core separation property.

  Moreover, as a manufacturing method of an intermittent type | mold tape core wire as described in patent document 4, the following three methods are mentioned. The first method includes a connecting portion to which an adhesive resin or coating resin is applied for a predetermined length in the longitudinal direction between adjacent optical fiber cores, and a non-connecting to which an adhesive resin or coating resin is not applied for a predetermined length This is a method of alternately forming portions. Application | coating of adhesive resin or coating resin is performed by application | coating. In the second method, an ultraviolet curable resin is applied to the entire length of a plurality of optical fiber core wires, and thereafter, ultraviolet (UV) irradiation is intermittently performed in the longitudinal direction, so that the cured portion (connecting portion) of the ultraviolet curable resin is undisturbed. This is a method of alternately forming hardened portions (non-connected portions). In the third method, a tape core is first formed, and a cut is formed with a resin removing member such as a cutter blade in the longitudinal direction of the common coating of the tape core, and a connecting portion and a non-connecting portion are alternately formed. It is a method to do.

JP 2010-128069 A Japanese Patent Laid-Open No. 2004-206048 JP 2008-241764 A JP 2010-8923 A

  Conventional tape cores as described in Patent Documents 1 to 4 generally have a tape coating on a 250 μm optical fiber single core, and are overcoated with a thickness of about 300 μm. On the other hand, in an intermediate branch of a home-use data communication service (FTTH: Fiber To The Home) using an optical fiber, there is an operation of separating a single optical fiber from a tape core and connecting it to a single core connector.

  However, the single-core connector is manufactured for a 250-μm optical fiber single-core wire, and in order to connect the single-core connector to a tape-core wire having a thickness of about 300 μm, it is necessary to completely remove the tape coating to connect the connector. It will not enter the part. Further, if the attachment is performed with the covering residue remaining, there is a possibility that a shortage of the single-core connector will occur.

  In addition, when an intermittent type tape core as described in Patent Document 4 is adopted, it is improved in terms of single core separation and storage in an optical cable, but such an intermittent type tape core is manufactured. Therefore, the first to third methods described above are adopted, and the following problems may occur.

  In the first and second methods, in order to improve the cable manufacturability by reducing the contact area between the optical fiber single core wire and the tape resin, and preventing the optical fiber single core wire and the tape resin from being separated at the time of manufacturing the optical cable. It is necessary to increase the adhesion between the two. Further, the increased adhesion force may cause a problem that it is difficult to completely remove the tape resin when processing into a single-core connector. In the third method, the tape resin cannot be completely removed, or the insertion position of the resin removing member may be displaced to damage the optical fiber single fiber.

  The present invention has been made in view of the above-described actual situation, and an object of the present invention is to provide an intermittent optical fiber in which a connecting portion and a non-connecting portion are intermittently formed along the longitudinal direction between optical fiber core wires. It is to improve cable manufacturability and single core separation in a tape core.

  An intermittent optical fiber ribbon according to an aspect of the present invention has a plurality of optical fiber cores arranged in parallel, and is intermittently and non-connected along the longitudinal direction between adjacent optical fiber cores. An intermittent type optical fiber ribbon having a portion formed thereon, and a coating resin is applied to the periphery of the optical fiber, and the connecting portion is formed of the optical fiber and the coating resin. It is connected with a connecting resin that has a higher adhesion per unit area with the coating resin compared to the adhesion per unit area.

  The manufacturing method of the intermittent type optical fiber ribbon which concerns on the other form of this invention has several optical fiber cores in parallel, and it connects intermittently along a longitudinal direction between the said adjacent optical fiber cores. A method of manufacturing an intermittent optical fiber ribbon in which a portion and a non-connecting portion are formed, the step of applying a coating resin around the optical fiber, and the optical fiber and the coating resin By intermittently applying a connecting resin having a high adhesion per unit area with the coating resin per unit area in the longitudinal direction around the coating resin. Forming the connecting part and the non-connecting part.

  A method for manufacturing an intermittent optical fiber ribbon according to another aspect of the present invention includes a plurality of optical fiber cores arranged in parallel, and intermittently connecting portions along the longitudinal direction in the adjacent optical fiber cores. And a step of applying a coating resin around the optical fiber core; and a step of applying the coating resin around the optical fiber core; and the optical fiber core and the coating resin. Applying a coupling resin having a high adhesion per unit area with the coating resin compared to the adhesion per unit area between the coating resin and forming the coupling portion; and Forming the non-connecting portion by intermittently cutting along the longitudinal direction with respect to the connecting resin.

  Advantageous Effects of Invention According to the present invention, in an intermittent type optical fiber tape core in which a connecting portion and a non-connecting portion are intermittently formed along the longitudinal direction between optical fiber core wires, cable manufacturability and single core separation are improved. be able to.

It is a figure which shows the example of 1 structure of the intermittent type | mold tape core wire which concerns on embodiment of this invention. It is a figure which shows the other structural example of the intermittent type | mold tape core wire which concerns on embodiment of this invention. It is a figure which shows one structural example of the manufacturing apparatus which manufactures a 2 core tape core wire. It is a schematic diagram for demonstrating the detail (tape resin coating method) of the manufacturing method in the manufacturing apparatus of FIG. It is a figure which shows an example of the die | dye used with the tape resin coating method of FIG. 3A. It is a figure which shows a mode that two 2-core tape core wires manufactured with the manufacturing apparatus of FIG. 2 were put in parallel. It is a figure which shows the BB cross section perpendicular | vertical to the longitudinal direction of the two 2 core tape core wires shown to FIG. 4A. It is a schematic diagram for demonstrating the manufacturing method which manufactures the intermittent type | mold tape core wire of FIG. 1A from the two 2 core tape core wires shown to FIG. 4A. It is a figure which shows the other structural example of the intermittent type | mold tape core wire which concerns on embodiment of this invention. It is a figure which shows the other structural example of the intermittent type | mold tape core wire which concerns on embodiment of this invention. It is a figure which shows the other structural example of the intermittent type | mold tape core wire which concerns on embodiment of this invention. It is a figure which shows the result of having compared cable manufacturability and optical fiber isolation | separation workability | operativity about the intermittent type | mold tape core wire of FIG. 1A, and the conventional intermittent tape core wire.

[Description of Embodiment of the Present Invention]
First, the contents of the embodiments of the present invention will be listed and described.
(1) An intermittent optical fiber ribbon according to an embodiment of the present invention has a plurality of parallel optical fibers, and is intermittently connected along the longitudinal direction between adjacent optical fibers. An intermittent type optical fiber ribbon in which a non-connecting portion is formed, and a coating resin is applied around the optical fiber core, and the connecting portion is provided for the optical fiber core and the coating. The resin is connected with a connecting resin having a high adhesion per unit area with the coating resin compared to the adhesion per unit area with the resin. Thereby, there exists an effect that cable manufacturability and single-core separability can be improved.

  (2) In the intermittent optical fiber ribbon of the above (1), the optical fiber core is a single optical fiber in which a plurality of optical fibers are arranged in parallel. Thereby, multi-centering can be easily performed.

  (3) In the intermittent optical fiber ribbon of the above (1), the optical fiber core is a single optical fiber core. Thereby, single core separation can be performed uniformly about each core wire.

  (4) In the intermittent optical fiber ribbon of the above (3), the connecting portion is provided with the coating resin around the parallel arrangement of the optical fibers, and further around the coating resin. The connecting resin is formed, and the non-connecting portion is formed by cutting the connecting resin and the covering resin between the adjacent optical fiber core wires. ing. Thereby, the intermittent type optical fiber ribbon which has the said effect can be manufactured with the method of forming a non-connecting part by cutting.

  (5) In the intermittent optical fiber tape core wire according to (2) or (3), the connection portion includes the connection resin between the optical fiber core wires to which the coating resin is adjacent. It is formed by coating. Thereby, the intermittent type optical fiber ribbon which has the said effect can be manufactured with the method of forming a connection part by application | coating of resin.

  (6) In the intermittent optical fiber ribbon of the above (2) or (3), the connecting portion has the connecting resin around the parallel arrangement of the optical fibers coated with the coating resin. The non-connecting part is formed by cutting the connecting resin between the adjacent optical fiber cores to which the coating resin is applied adjacently. Yes. As a result, an intermittent optical fiber ribbon that has the above-described effect can be manufactured by a method of forming the unconnected portion by cutting, and the distance between the cores can be easily separated. It becomes difficult to hurt.

  (7) In the intermittent optical fiber ribbon of any one of (1) to (6), the peel strength between the optical fiber and the coating resin is 4 N / m or less. ing. Thereby, the optical fiber separation workability can be improved.

  (8) A method for manufacturing an intermittent optical fiber ribbon according to another embodiment of the present invention includes a plurality of optical fiber cores arranged in parallel, and intermittently along the longitudinal direction between adjacent optical fiber cores. A method of manufacturing an intermittent optical fiber ribbon in which a connecting portion and a non-connecting portion are formed, wherein a coating resin is applied around the optical fiber core, and the optical fiber core and the coating A coupling resin having a high adhesion per unit area with the coating resin compared to the adhesion per unit area with the coating resin is intermittently applied around the coating resin along the longitudinal direction. Thus, the step of forming the connecting portion and the non-connecting portion is provided. Thereby, the intermittent type optical fiber tape core wire which improved cable manufacturability and single core isolation | separation property can be manufactured.

  (9) A method for manufacturing an intermittent optical fiber ribbon according to another embodiment of the present invention includes a plurality of optical fiber cores arranged in parallel, and intermittently along the longitudinal direction of the adjacent optical fiber cores. A method of manufacturing an intermittent optical fiber ribbon in which a connecting portion and a non-connecting portion are formed on the optical fiber core, the step of applying a coating resin around the optical fiber core, the optical fiber core and the coating A step of applying the connecting resin having a high adhesion per unit area with the coating resin compared to the adhesion per unit area between the resin and forming the connection portion around the coating resin. And the step of forming the non-connected portion by intermittently cutting the connecting resin along the longitudinal direction. Thereby, the intermittent type optical fiber tape core wire which improved cable manufacturability and single core isolation | separation property can be manufactured.

[Details of the embodiment of the present invention]
Hereinafter, specific examples of an intermittent optical fiber ribbon (intermittent tape ribbon) and a method for manufacturing the same according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  The intermittent tape core according to the present embodiment has a plurality of optical fiber cores arranged in parallel, and a connection portion and a non-connection portion are intermittently formed along the longitudinal direction between adjacent optical fiber core wires. Yes. The optical fiber core wire is assumed to be (a) a plurality of optical fiber single core wires arranged in parallel, or (b) one optical fiber single core wire. In the case of (a), the number of cores can be easily increased, and in the case of (b), the single-core separation can be performed uniformly for each core wire. In addition, a multi-core optical fiber core wire can also be adopted instead of the optical fiber single core wire, and the single-core separation in this case indicates separation into one multi-core optical fiber core wire.

  Here, the single-fiber optical fiber is a single-fiber optical fiber including what is also called an optical fiber strand in which a glass fiber is coated with a fiber, or a colored layer on the outer surface of the fiber coating. Point to. A multi-core optical fiber is a fiber core coated with a plurality of cores extending in the fiber axis direction and covered with a common cladding, and a colored layer on the outer surface. Also good.

  In the following description, the optical fiber core wire (a) and the optical fiber core wire (b) will be described using an example in which a plurality of optical fiber single core wires are used, and an example in which one optical fiber is used. The same applies to the case where a multi-core optical fiber is used instead of the single fiber.

  First, with reference to FIGS. 1A and 1B, a configuration example of the intermittent tape core wire according to the present embodiment will be described. FIG. 1A is a diagram illustrating a configuration example of an intermittent tape core according to an embodiment of the present invention, and FIG. 1B is a diagram illustrating another configuration example.

  In the intermittent tape core 1 illustrated in FIG. 1A, a coating resin (primary coating) 12 is applied around a plurality of optical fiber single cores 11 (two in this example) in parallel to form a tape core ( In this example, a two-core tape core wire) is formed, and a plurality (two in this example) of the tape core wires are arranged in parallel. That is, in this example, a two-core tape core is given as an example in which the coating resin 12 is applied to the optical fiber core of the above (a), and two of the two-core tape cores are juxtaposed to form a four-core tape. It forms a heart line. Here, the coating resin 12 is preferably one obtained by curing an ultraviolet curable resin (hereinafter referred to as a first ultraviolet curable resin), but is not limited thereto.

  And the intermittent type | mold tape core wire 1 has the connection part 13 and the non-connection part 14 formed intermittently along the longitudinal direction between the adjacent 2 core tape core wires. Here, the connecting portion 13 has a unit adhesion force as compared to an adhesion force (referred to as a unit adhesion force) per unit area between the two optical fiber single core wires 11 and the coating resin 12 (also referred to as an upper layer). Are connected with high connecting resin. For example, the unit adhesive force of the lower layer can be made lower than the unit adhesive force of the upper layer by containing more lubricant in the outer layer of the optical fiber single-core wire 11 than the coating resin 12 and the connecting resin.

  The adhesion per unit area may be lower in the lower layer than between the coating resin 12 and the coupling resin (also referred to as the upper layer) because the contact area in the lower layer is around the optical fiber core (in this example, 2). This is because the lower layer is less likely to be peeled off than the upper layer having the non-connecting portion 14.

  The resin is preferably an ultraviolet curable resin (hereinafter referred to as a second ultraviolet curable resin), but may be an adhesive resin or another coating resin. In particular, in the configuration example of FIG. 1A, the connecting portion 13 is formed by applying a connecting resin between adjacent two-core tape core wires as shown in the figure, and the non-connecting portion 14 is a portion not applied. It is formed by leaving it as it is.

  Further, in FIG. 1A, when viewed in the tape width direction, a portion where the connecting portions 13 and the non-connecting portions 14 are alternately arranged (a portion indicated by a length X) and a portion where only the non-connecting portions 14 are provided ( In this example, the portion indicated by the length Y) appears alternately at a predetermined pitch in the longitudinal direction. For example, X is 40 mm, Y is 60 mm, and the like. However, the values of X and Y and the arrangement pattern of the connecting part 13 and the non-connecting part 14 are not limited to this example. Further, in FIG. 1A, as a more preferable example, an intermittent pattern that is line symmetric with respect to the boundary between the second line and the third line located in the center in the width direction will be described, but the present invention is not limited to this. Absent.

  Thus, after coating the optical fiber single core wire 11 with a tape resin (coating resin 12) having a relatively low unit adhesive force, the unit adhesive force between the tape core wires coated with the coating resin 12 is reduced. By adopting a structure in which a high connecting resin is applied to form the connecting portion 13, the optical fiber single fiber 11 and the tape resin are prevented from peeling off during the manufacturing process, and the optical fiber single fiber 11 is damaged. Therefore, cable manufacturability can also be improved. Further, such a structure can be rounded in the tape width direction, so that high-density mounting in an optical cable is possible.

  Furthermore, such a structure can improve single-core separation. In other words, the connecting portion 13 can be easily removed by rolling and kneading in the tape width direction due to the presence of the non-connecting portion 14, and the unit adhesion of the lower layer is low. It is possible to easily perform a tape resin removing operation by removing the tape resin including the resin 12 and exposing the optical fiber single core wire 11. For example, this removal work may be performed only in the longitudinal direction or the direction perpendicular to the longitudinal direction using a brush, a file, a dedicated tool, or the like. In particular, when there is a dent in the coating between adjacent optical fiber cores 11, the resin can be easily removed by rubbing in the vertical direction using a file or a dedicated tool.

  As described above, as an example in which the optical fiber core wire (a) is adopted, an example in which the coating resin 12 is applied to each of the two optical fiber single core wires 11 and the connecting resin is applied between the two core tapes. Although mentioned, it is applicable similarly when the optical fiber core wire of said (b) is employ | adopted.

  Specifically, as in the intermittent tape core 1a shown in FIG. 1B, a second ultraviolet curable resin or the like is connected between the adjacent optical fiber cores (optical fiber cores 11) of (b) above. The connecting portion 13 may be formed by applying the resin for resin, and the uncoated portion 14 may be left as it is. In the intermittent type tape core 1a, four optical fiber single cores 11 are arranged in parallel to form a four-core tape core. In addition, the arrangement pattern of the connection part 13 and the non-connection part 14 is not restricted to the example shown to FIG. 1B, It is the same also in the example mentioned later.

  As a manufacturing method for manufacturing the intermittent tape cores 1 and 1a according to the present embodiment, the first and second methods described above as the prior art are required as long as the unit adhesion force, which is a characteristic part of the present embodiment, is satisfied. This method can be used. Hereinafter, an example of adopting the second method using the second ultraviolet curable resin as the coupling resin will be described as an example of a method of manufacturing the intermittent tape core wire 1 with reference to FIGS.

  FIG. 2 is a diagram showing a configuration example of a manufacturing apparatus for manufacturing a two-core tape core wire. 3A is a schematic diagram for explaining the details of the manufacturing method (tape resin coating method) in the manufacturing apparatus of FIG. 2, and FIG. 3B is a diagram showing an example of a die used in the method. 4A is a diagram showing a state in which two 2-core tape cores manufactured by the manufacturing apparatus of FIG. 2 are arranged in parallel, and FIG. 4B is a longitudinal direction of the two 2-core tape cores shown in FIG. 4A. It is a figure which shows the BB cross section perpendicular | vertical to. FIG. 5 is a schematic diagram for explaining a manufacturing method for manufacturing the intermittent tape core of FIG. 1A from the two two-core tapes shown in FIG. 4A.

  First, a method for producing a two-core tape core wire will be described. As shown in FIG. 2, N reels 22, N dancer rollers 23, and guide rollers 24 are provided in the supply device 20. N is the number of the cores of the tape core, and N = 2 when the 2-core tape 10a is manufactured. An optical fiber single core wire 11 is wound around each reel 22.

  The optical fiber single cores 11 are drawn out from the respective reels 22, given a tension of several tens of gf by the dancer rollers 23, and are arranged on one arrangement surface when passing through the guide rollers 24. Further, the light is further concentrated by the upper guide roller 25 and sent to the coating device 26.

  The coating device 26 is equipped with a nipple 26a and a die 26b as shown in FIGS. 3A and 3B. The nipple 26a has an oval outgoing wire hole, and the die 26b has N pieces (two cores in this example) so that the first ultraviolet curable resin is applied in units of the optical fiber single core wire 11. The holes through which the optical fiber single core wires pass are provided separately. The diameter of the hole of the die 26b may be determined according to the tape thickness.

  The optical fiber single-core wire 11 is sent to such a coating device 26 and pulled with a predetermined tension at a later stage. Thereby, the optical fiber single core wire 11 passed through is guided by the nipple 26a to be in a desired arrangement, and is sent to the die 26b in a state where the fiber coating is exposed, so that the first ultraviolet curing type as the coating resin 12 is obtained. Resin is applied around the optical fiber single core wire 11. The first ultraviolet curable resin is supplied from a pressure type resin tank 27. In the state where the first ultraviolet curable resin is applied to the periphery, the coating resins 12 applied to the optical fiber single core wires 11 are separated from each other as shown in FIG. 3A.

  In the conventional one-hole die, the optical fiber core wires are coated in contact with each other by the tension applied to the core wire. However, by using the die 26b as shown in FIG. The first ultraviolet curable resin can be applied in a state where the pitch between the single core wires 11 is widened, that is, in units of core wires. When the intermittent tape core 1a is manufactured, the coating resin 12 may be overcoated on the optical fiber single core 11.

  Then, the N (two in this example) optical fiber cores with the coating resin 12 coated with the first ultraviolet curable resin are mutually part of the coating resin 12 immediately after coming out from the die 26b. Are collected so that they come into contact with each other, and are irradiated with ultraviolet rays from a UV lamp 28a in an ultraviolet irradiation device 28 to be cured. The cured first ultraviolet curable resin becomes the coating resin 12, and an N-core tape core (in this example, a 2-core tape core 10a as shown in FIG. 4A) is formed.

  The tape core wire 10a cured by being irradiated with ultraviolet rays by the ultraviolet irradiation device 28 is further sent to a winding device 33 having a reel via a guide roller 30, a delivery capstan 31 and a winding tension control dancer roller 32. In the winding device 33, the tape core wire 10a is wound around a reel through a guide. At this time, the winding tension of the entire tape core wire is set to several tens gf to several hundreds gf, for example. In addition, before irradiating with the ultraviolet irradiation device 28, the optical fiber core wire with the coating resin 12 output from the die 26b is blown with air from the arrangement direction of the optical fiber core wires, and the winding device 33 collects the wire successfully. By pulling with a predetermined tension adjusted so as to be able to be concentrated, the optical fiber single-core wires with the coating resin 12 can be brought into contact with each other.

  In this way, by performing collective coating with the coating resin 12 in a state where the pitch between the centers of the adjacent optical fiber single core wires 11 is widened, as illustrated in FIGS. 4A and 4B, between the core wires. The tape core wire 10a to which the common coating resin 12 having a depression is applied can be manufactured. 4A is the same as the tape core wire 10a. Note that the coating resin 12 may not have a depression between the core wires, and the tape surface may be flat.

  For example, when the tape thickness of the tape cores 10a and 10b is about 250 μm, the outer diameter of the optical fiber single core 11 is about 200 μm in view of the coating resin 12, and the thickness is about 25 μm. The coating resin 12 may be applied around the periphery. In addition, when using the optical fiber single core wire 11 colored to give the core wire distinguishability, the optical fiber single core wire is drawn so as to have a covering diameter of about 200 μm and colored. A colored core wire having an outer diameter of about 205 μm may be manufactured and wound on the reel 22. Thereby, the tape cores 10a and 10b having a tape thickness of about 255 μm are manufactured.

  Then, two two-core tape cores 10a and 10b manufactured as shown in FIG. 4A, FIG. 4B, and FIG. 5 are arranged in parallel, and the second UV curable resin is applied by the coating device 50 as shown in FIG. The intermittent tape core wire 1 can be manufactured by applying 53 and curing with a second ultraviolet irradiation device.

  Specifically, the coating device 50 includes an inkjet coating device, a dispenser, and the like, and a UV resin supply device 51 that supplies a second UV curable resin 53 having a unit adhesion higher than that of the first UV curable resin, And a nozzle 52 attached to the UV resin supply device 51. Then, the coating device 50 pulls the second ultraviolet curable resin 53 from the nozzle 52 to the position where the connecting portion 13 is formed while pulling the two two-core ribbons 10a and 10b arranged in parallel in the direction perpendicular to the paper surface of FIG. Spray and apply. Then, the connection part 13 is formed by irradiating with the 2nd ultraviolet irradiation device which is not shown in figure, and hardening the 2nd ultraviolet curable resin 53.

  The apparatus shown in FIG. 2 is prepared for the production of the two two-core ribbons 10a and 10b, and the coating device 50 and the second ultraviolet irradiation device are provided at a position where they are gathered so as to be arranged in parallel. In other words, the intermittent tape core wire 1 may be manufactured on one line.

  The second method has been described above as an example. However, when an adhesive resin or the like is used instead of the second ultraviolet curable resin, the second method may be used. Further, with respect to the intermittent tape core 1a, the second method can be similarly applied except that the coating resin 12 is applied to the single optical fiber 11 instead of the two.

  Next, another configuration example of the intermittent tape core wire according to the present embodiment will be described with reference to FIGS. In order to simplify the description of the three configuration examples described here, only differences from the configuration example of FIG. 1A or FIG. 1B described above will be basically described, and description of other portions will be omitted.

  The intermittent tape core 60 illustrated in FIG. 6 is the same as the intermittent tape core 1 of FIG. 1A to which the optical fiber core of the above (a) is applied, but its manufacturing method is different, and therefore The shapes of the connecting part and the non-connecting part are also different. The intermittent tape core 60 is the same as the intermittent tape core 1 up to the formation of two two-core tape cores coated with the coating resin 12 as compared to the intermittent tape core 1, but in a state in which the two are in parallel. Further, the connecting resin 63 which is the second ultraviolet curable resin is applied to the whole. It can be said that this connecting resin 63 forms a secondary coating. In fact, if two 2-core ribbons are juxtaposed and the connecting resin is applied in the same manner as described with reference to FIG. 2 (of course, the shape of the nipple and the die is different from FIGS. 3A and 3B). ), It is possible to produce a tape core wire with a common coating before intermittent machining.

  Here, in the conventional one-hole die, the optical fiber core wires are covered with each other by the tension applied to the core wires, but by using the die 26b as shown in FIG. 3B, The second ultraviolet curable resin can be applied in a state where the pitch between each of the two-core tape cores is widened, and can be prepared for a cut for forming the subsequent non-connection portion 14.

  Thereafter, the cutter blade 65 and the like are intermittently cut in the connecting resin 63 by a rotary blade or the like provided on the outer peripheral surface, thereby forming the non-connected portion 14 and the portion where the cut is not made Is a connecting part. Thereby, the intermittent type | mold tape core wire 60 can be manufactured.

  That is, the connecting portion in the present configuration example has all of the optical fiber cores of the above (a) such as a two-core tape core wire coated with the coating resin 12 in parallel, and the optical fiber core of the above (a) around it. It is formed by applying the connecting resin 63 so that all the wires are integrated. The non-connecting portion 14 in this configuration example is cut into the connecting resin 63 between the optical fiber core wires (a) such as the two-core tape core wires to which the adjacent coating resin 12 is applied. It is formed by that. Such a structure makes it easy to increase the distance between the two-core tape core wires, so that it is difficult to damage the optical fiber single core wire 11 at the time of cutting.

  The intermittent tape core 70 illustrated in FIG. 7 is the same as the intermittent tape core 1a shown in FIG. 1B to which the optical fiber core (b) is applied, but its manufacturing method is different. Therefore, the shapes of the connecting part and the non-connecting part are also different. Regarding this difference, in the present configuration example as well, the non-connecting portion 14 may be formed by making a cut in the same manner as the method described in FIG. That is, when the optical fiber core wire of (b) is applied to the method described in FIG. 6, the result is as shown in FIG.

  More specifically, the intermittent tape core 70 is the same up to the formation of the four optical fiber cores 11 coated with the coating resin 12 as compared with the intermittent tape core 1a. The connecting resin 73 is further applied to the whole in a state where four are arranged in parallel. The connecting resin 73 is preferably the second ultraviolet curable resin, but may be other resins.

  Actually, four optical fiber cores 11 coated with the coating resin 12 are juxtaposed in parallel, and the connecting resin 73 is expanded in a state where the pitch between the cores is increased in the same manner as described with reference to FIG. (Needlessly, the shape of the nipple and the die is four, unlike FIGS. 3A and 3B), a four-core ribbon with a common coating before intermittent machining can be manufactured.

  Thereafter, the cutter blade 75 and the like are intermittently cut in the longitudinal direction between the first line and the second line and between the third line and the fourth line from the left of the connecting resin 73 by a rotary blade or the like provided on the outer peripheral surface. The non-connection part 14 is formed by putting. Similarly, the non-connecting portion 14 formed here is at a position that is different in the longitudinal direction, and is formed between the second line and the third line of the connecting resin 73 by a rotary blade having a cutter blade 76 and the like provided on the outer peripheral surface. The non-connecting portion 14 is further formed by intermittently cutting in the direction. And let the part which is not incised be a connection part. Thereby, the intermittent type | mold tape core wire 70 can be manufactured.

  In other words, the connecting portion in the present configuration example includes all of the optical fiber cores of the above (b) such as an optical fiber single core wire to which the coating resin 12 is applied, and the optical fiber core of the above (b) around it. It is formed by applying a connecting resin 73 so that all the wires are integrated. The non-connecting portion 14 in this configuration example is cut into the connecting resin 73 between the optical fiber core wires (b) such as an optical fiber single core wire to which the adjacent coating resin 12 is applied. It is formed by that. With such a structure, since the distance between the optical fiber single fibers 11 can be easily separated, the optical fiber single fiber 11 is not easily damaged at the time of cutting.

  The intermittent tape core 80 illustrated in FIG. 8 is an optical fiber core of the above (b), that is, a single optical fiber single core, and the connecting portion is an optical fiber single core. The covering resin 12 is applied to the periphery where all of these are arranged in parallel, and the connecting resin 83 is applied to the periphery of the covering resin 12. Again, as the coupling resin 83, it is preferable to employ the second UV curable resin, but other resins may be used.

  Actually, four optical fiber cores 11 are juxtaposed, and coating resin 12 is applied in a state in which the pitch between the cores is increased in the same manner as described with reference to FIG. 2 (of course, nipple and die). 3A and 3B are used for four wires), and if a connecting resin 83 is further applied to the periphery, a four-core tape core wire with a double common coating before intermittent processing is manufactured. can do.

  After that, the cutter blade 85 and the like are intermittently cut in the longitudinal direction between the first line and the second line and between the third line and the fourth line from the left of the connecting resin 83 by a rotary blade or the like provided on the outer peripheral surface. The non-connection part 14 is formed by putting. Similarly, the non-connecting portion 14 formed here is at a position different in the longitudinal direction, and the cutter blade 86 and the like are disposed between the second and third lines of the connecting resin 83 by a rotary blade provided on the outer peripheral surface. The non-connecting portion 14 is further formed by intermittently cutting in the direction. These cuts reach the coating resin 12 as well. And let the part which is not incised be a connection part. Thus, the non-connecting portion 14 in this configuration example is formed by cutting the connecting resin 83 and the covering resin 12 between adjacent optical fiber single core wires. Thereby, the intermittent type | mold tape core wire 80 can be manufactured.

  Although not specifically shown, in the intermittent tape core wire in which the connecting portion 13 and the non-connecting portion 14 are formed at the same position as the intermittent tape core wire 1a in FIG. Intermittent cutting) can also be employed. For example, four optical fiber single cores 11 coated with four coating resins 12 are arranged in parallel, and the periphery is collectively applied with a connecting resin, and intermittently cut to form a non-connecting portion 14. Tape cores can also be manufactured. This example corresponds to the configuration example of FIG. 8 in which the optical fiber core wire (a) is adopted.

  Next, as the intermittent tape core wire 1 as shown in FIG. 1A and a conventional intermittent tape core wire having the same shape and different unit adhesive force, a plurality of types of tape core wires are manufactured by changing the unit adhesive force, The cable manufacturability and optical fiber separation workability (single fiber separation workability) were compared. A part of the results is shown in Table 90 of FIG.

  Here, the length X of the connecting portion was 40 mm, and the length Y of the non-connecting portion was 60 mm. The unit adhesion was compared with peel strength. Hereinafter, the peel strength between the outer layer of the optical fiber single core wire (that is, the outer surface of the optical fiber single core wire) and the coating resin (primary coating) is referred to as the first peel strength, and the primary coating and the connecting resin ( The peel strength between the secondary coating and the connecting portion is called the second peel strength.

  The peel strength was measured as follows. In the case of the first peel strength, first, the coating resin 12 around the single optical fiber 11 is cut with a knife or razor. Then, since the coating resin 12 is separated vertically, one of them is gripped and pulled at a speed of 100 mm / min in the direction perpendicular to the longitudinal direction (90 ° direction) of the optical fiber core wire 11, and the tensile force at that time is measured. . In the case of three or more cores instead of the two-core ribbon, the optical fiber cores other than both ends in the width direction of the tape core (parallel direction of the optical fiber cores) and the adjacent optical fiber cores The covering resin 12 is cut with a knife or a razor, and the optical fiber cores other than both ends in the width direction are separated from the adjacent optical fiber cores. Thereby, the coating resin 12 can be separated vertically.

  Next, the length of the coating resin 12 peeled from the value of the tensile force is measured and converted to a peeling strength per unit length. Further, when the coating resin 12 is cut at the time of measuring the tensile force, the coating resin 12 at the time of measurement is applied by applying an adhesive to the coating resin 12 or forming a top-coated cured coating film. May be prevented.

  In the case of the second peel strength, first, the longitudinal direction of the two tape core wires is connected to the connecting portion 13 that connects two tape core wires each having the coating resin 12 applied around the optical fiber single core wire 11. Pulling is performed at a speed of 100 mm / min in the vertical direction (90 ° direction), and the tensile force at that time is measured. Next, the length of the connecting portion 13 peeled from the value of the tensile force is measured and converted to a peel strength per unit length. Moreover, when the connection part 13 will cut | disconnect at the time of measurement of a tensile force, the cutting | disconnection of the connection part 13 at the time of a measurement will be carried out by apply | coating an adhesive agent to the connection part 13 or forming a top coat cured coating film. It may be prevented.

  In addition, regarding cable manufacturability, whether or not the tape does not disperse due to peeling of the closely adhered resin when twisted 5 pieces of intermittent tape cores with a pitch of 500 mm and a tension of 500 g at the time of cable conversion. Judgment was made, and “Y” was given when no scatter occurred, and “N” was given when it occurred. The optical fiber separation workability is determined by whether or not the separation work (work to remove the coating until it can be connected to the single-core connector) is completed within 1 minute per core at a length of 200 mm in the longitudinal direction, The case where separation was possible within 1 minute was marked with “Y”, and the case where separation was impossible was marked with “N”.

  As a result, for cable manufacturability, when the second peel strength is 2.0 N / m, there is a problem that the tape is broken during cable production, and when the second peel strength is 5.0 N / m or more, Such a scatter did not occur. On the other hand, it was found that the optical fiber separation workability is good when the first peel strength is 4.0 N / m or less, but is slightly worse when it exceeds 4.0 N / m.

Thus, it has been found that a higher second peel strength is preferable from the viewpoint of cable manufacturability, and a lower first peel strength is preferable from the viewpoint of optical fiber separation workability. It was also found that the first peel strength is preferably 4 N / m or less.
Moreover, although the same test was done also with the intermittent type | mold tape core wire of the shape illustrated in FIG. 1B and FIGS. 6-8, the result of the tendency similar to what was demonstrated with reference to Table 90 was obtained. .

  The intermittent tape core wire according to the present embodiment has been described above. However, as described in the manufacturing procedure, the present invention can also take a form as the manufacturing method. This production method is as described in the production method (8) and the production method (9), and the corresponding intermittent tape cores are illustrated in FIGS. 1A, 1B, and 6 to 8, respectively. That's right.

  As described above, the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is not limited to the examples described above, but is defined by the scope of the claims, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims. .

DESCRIPTION OF SYMBOLS 1, 1a ... Intermittent type optical fiber tape core wire (intermittent type tape core wire), 10a, 10b ... 2 core tape core wire, 11 ... Optical fiber single core wire, 12 ... Covering resin, 13 ... Connection part, 14 ... Unconnected part.

Claims (9)

An intermittent optical fiber ribbon having a plurality of optical fiber cores arranged in parallel and intermittently formed with a connecting portion and a non-connecting portion along the longitudinal direction between the adjacent optical fiber core wires,
A coating resin is applied around the optical fiber core,
The connecting portion is connected by a connecting resin that has a higher adhesive force per unit area with the coating resin than an adhesive force per unit area between the optical fiber core wire and the coating resin. , Intermittent optical fiber ribbon.   The intermittent optical fiber tape core wire according to claim 1, wherein the optical fiber core wires are a plurality of optical fiber single core wires arranged in parallel.   The intermittent optical fiber ribbon according to claim 1, wherein the optical fiber is a single optical fiber. The connecting portion is formed by applying the covering resin around the optical fiber core wires in parallel, and further applying the connecting resin around the covering resin,
4. The intermittent optical fiber ribbon according to claim 3, wherein the non-connecting portion is formed by cutting the connecting resin and the coating resin between the adjacent optical fibers. 5. .   4. The intermittent optical fiber tape according to claim 2, wherein the connecting portion is formed by applying the connecting resin between the adjacent optical fiber cores to which the coating resin is applied. 5. Heartline. The connecting portion is formed by applying the connecting resin around the optical fiber core wires to which the coating resin is applied in parallel,
The intermittent type according to claim 2 or 3, wherein the non-connecting portion is formed by cutting the connecting resin between the optical fiber core wires to which the coating resin is applied adjacently. Optical fiber ribbon.   The intermittent optical fiber ribbon according to any one of claims 1 to 6, wherein a peel strength between the optical fiber and the coating resin is 4 N / m or less. A method of manufacturing an intermittent type optical fiber ribbon having a plurality of optical fiber cores arranged in parallel and intermittently connecting and disconnecting portions formed along the longitudinal direction between adjacent optical fiber cores. There,
Applying a coating resin around the optical fiber core; and
A connecting resin having a high adhesion per unit area with the coating resin compared to the adhesion per unit area between the optical fiber core wire and the coating resin is formed longitudinally around the coating resin. Forming the connecting part and the non-connecting part by intermittently applying along the direction;
A method of manufacturing an intermittent optical fiber ribbon having This is a method of manufacturing an intermittent optical fiber ribbon having a plurality of optical fiber cores arranged in parallel and intermittently formed with connecting portions and non-connecting portions along the longitudinal direction in the adjacent optical fiber core wires. And
Applying a coating resin around the optical fiber core; and
A connecting resin having a higher adhesion per unit area with the coating resin than that of the optical fiber core and the coating resin is applied around the coating resin. And forming the connecting portion;
Forming the non-connected portion by intermittently cutting along the longitudinal direction with respect to the connecting resin;
A method of manufacturing an intermittent optical fiber ribbon having

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