JP2005114750A - Split tape core, optical fiber tape cord using the split tape core, optical fiber cable, and splitting method of the split tape core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply divide a divided type optical fiber ribbon into optional SUB-UNITs. <P>SOLUTION: A first optical fiber ribbon 7 is made into a first SUB-UNIT as a dividing unit by coating a plurality of primary coated optical fibers 3, which are arranged in parallel, with a first layer batch coating resin 5. A plurality of the first SUB-UNITs is arranged in parallel, is made into a dividable manner and coated by a second layer batch coating resin 13 to constitute of a second SUB-UNIT. The divided type optical fiber ribbon is made by batch coating n kinds of SUB-UNIT units with batch coating resin having n layers, which are at least equal to or more than two layers, in a dividable manner. Let F(n/n-1) be the adhesive force between the batch coating resin of an n th layer and the batch coating resin of an (n-1) th layer. Then, the adhesive force between each layer of the batch coating resin is set so that the adhesive power of the outer layer side is lower than the adhesive power of the inner layer side. Therefore, when the optical fiber ribbon is stroked along the tape thickness direction, only the outer layer is easily peeled off and the optical fiber ribbon is divided into arbitrary SUB-UNITs by successively peeling off from the outermost layer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a split tape core, an optical fiber tape cord using the split tape core, an optical fiber cable, and a splitting method of the split tape core.

  As a multi-core tape core wire that can be divided into SUB-UNIT units (hereinafter referred to as “split-type tape core wire”), for example, eight cores that can be divided into four-core units that are most often mounted in optical fiber cables in Japan. There is an optical fiber ribbon (hereinafter referred to as “8-fiber ribbon”). The 4-fiber unit is a unit of a 4-fiber optical fiber ribbon (hereinafter referred to as “4-fiber ribbon”). The 4-core and 8-core tape core wires are excellent in that they contribute to improving the economic efficiency and handling of optical fiber cables for trunk systems, wiring systems, and in-building wiring in optical networks.

  As described above, in the split type tape core represented by the 8-core tape core, the internal dye line is exposed when it is divided into a predetermined number of core units, for example, every 4 cores. It is necessary to have a division characteristic that does not exist.

  For this purpose, a coating with a predetermined number of division cores called edge bond type, capsule type, etc., an adhesive part (edge bond type) connecting the division core units, and a two-layer coating called collective coating (capsule type) Structure is adopted.

  For example, referring to FIG. 9, the edge bond type 8-core tape core wire 101 is provided with an edge portion 105 at a corner on the side where two four-core tape core wires 103 are connected to each other, and is bonded to the edge portion 105. The agent 107 is poured and connected.

  On the other hand, as shown in FIG. 10, the capsule-type 8-core tape core wire 109 is composed of two 4-core tape core wires 103 that are covered and connected by, for example, an 8-core batch UV resin 111 as a connecting resin. (For example, refer to Patent Document 1).

  The above-mentioned four-core tape core wire 103 is formed by coating four optical fiber strands 113 with, for example, a four-core batch UV resin 115 as a batch coating resin, and each optical fiber strand 113 is, for example, 125 μmφ. The outer periphery of quartz glass 117 is coated with UV resin 119 to 250 μmφ.

  In addition, since one-line or two-core optical cables are used for the wiring of the user system and the lead-in line to each subscriber's house, the single-core or It is necessary to divide and separate into the 4-fiber ribbon 103. Therefore, in order to realize an optical network at a low cost, it is required to divide the single-core or four-fiber ribbon 103 efficiently and at a low cost.

  Referring to FIG. 11, a large number of the above-described split type tape cores are laminated inside the optical fiber cable 121. For example, in the optical fiber cable 121, a plurality of split tape core wires are assembled in a strength member 125 provided at the center of the slot rod 123 and a plurality of slot grooves 127 arranged around the strength member 125. For example, a metal tape 129 is vertically wound as a presser winding, and the outer periphery of the metal tape 129 is sheathed with a sheath 131 such as a sheath resin.

  The optical fiber strand 113 separated from the 8-core tape core wires 101 and 109 into a single core is an optical fiber strand of each single core of the plurality of 4-core tape core wires 103 built in the user system wiring cable 133. The wire 113 is connected to the single core fusion splicing part 135. Note that the user-related wiring cable 133 includes a plurality of four-core tape cores 103 disposed substantially at the center and two strength members disposed at positions facing the outside of the plurality of four-core tape cores 103. 137 and a sheath material 139 that covers the outer periphery of the plurality of four-core tape core wires 103 including the two strength members 137.

  The above-described split-type tape core wire is divided into the respective split core wires by applying a shear stress to the split portion between the split core wires in the width direction of the split-type tape core wire, for example, by a splitting device. used.

  Note that the split-type tape core wire itself has been devised so that the split-type tape core wire can be easily split at a normal position without shifting from the split portion. For example, in the case of the capsule-type 8-core ribbon 109 described above, consideration has been given to facilitate the division by specifying the adhesion force, Young's modulus, and elongation rate of the collective coating resin and the connecting resin (for example, patents). Reference 1).

  Further, in the conventional split type tape core, after coating is performed in units of the number of cores to be divided, that is, in the SUB-UNIT unit, it is collectively coated with one layer as described above to form an 8-core tape core. In recent years, with the diversification of cable structures, there are cases where the number of core units to be divided may be plural, so that a plurality of layers are collectively covered to form a tape core with a predetermined number of cores. There is something.

As an example, as shown in FIG. 12, there is a split type 16-fiber ribbon 141 that can be divided into four or eight cores. In the split type 16-fiber ribbon 141, a 4-fiber unit optical fiber 113 is temporarily converted into a 4-fiber SUB-UNIT into a 4-fiber ribbon 103 by a 4-fiber batch UV coating 115, and the 4-fiber SUB-UNIT is formed. The two UNITs 103 are arranged in parallel, and the eight-core batch UV resin 111 converts the eight-core tape core wire 109 into the eight-core SUB-UNIT. Further, after two 8-fiber SUB-UNITs 109 are arranged in parallel, it is covered with a 16-fiber batch UV resin 143 to form a split-type 16-fiber ribbon 141.
JP-A-10-197767

  By the way, the above-described split type 8-core tape core 109 in FIG. 10 can be divided into units of 4 cores in structure, but it is not easy to divide at a normal position without shifting from the split part. In addition, the above-described split type 16-fiber ribbon 141 of FIG. 12 can be structurally divided into four-core units or four-core two-core units, but includes a 4-fiber SUB-UNIT. There are three UV resin coating layers 115, 111, and 143, and the 4-core SUB-UNIT is very small, 1.1 mm or less in width, and it is difficult to divide into arbitrary division units. It was. Furthermore, when the tape or the UV resin coating layer is multi-layered, it is difficult to perform further division.

  The present invention has been made to solve the above-described problems.

The split tape core of the present invention constitutes the first SUB-UNIT with a first tape core formed by coating a plurality of optical fiber strands arranged in parallel with a first layer of batch coating resin, as a division unit, A plurality of the first SUB-UNITs are arranged in parallel, and a second SUB-UNIT is covered with a second layer of a batch coating resin so as to be divided, thereby forming a second SUB-UNIT. In addition to the n-type SUB-UNIT unit, it is possible to divide it into a single unit so that it can be divided.
When the adhesion force between the batch coating resin of the nth layer of the batch coating resin and the batch coating resin of the (n-1) layer is F (n / n-1),
The adhesion between each layer of the batch coating resin is
F (n / n-1) ≤F (n-1 / n-2) ≤ ... ≤F (2/1)
It has the following conditions.

  In the split-type tape core of the present invention, in the split-type tape core, the adhesion between the layers of the batch coating resin is adjusted by changing the addition concentration of the silicon additive added to the batch coating resin constituting each layer. It is preferable.

The optical fiber tape cord of the present invention constitutes a first SUB-UNIT with a first tape core wire obtained by coating a plurality of optical fiber strands arranged in parallel with a first layer of a batch coating resin, A plurality of first SUB-UNITs are arranged in parallel to be divided into a single layer with a second layer coating resin so as to be divided, thereby forming a second SUB-UNIT, and at least two or more layers n-layer coating resin The n-type SUB-UNIT unitally coats so as to be capable of being divided, and the adhesion between the n-th batch coating resin and the (n-1) -th batch coating resin of the batch coating resin. When the force is F (n / n-1), the adhesion between the layers of the batch coating resin is
F (n / n-1) ≤F (n-1 / n-2) ≤ ... ≤F (2/1)
A split-type tape core wire configured with the following conditions:
It is characterized by comprising a tensile body disposed on the outer periphery of the split tape core and a jacket covering the periphery of the tensile body.

  In the optical fiber tape cord of the present invention, in the optical fiber tape cord, the adhesion between the layers of the batch coating resin can be adjusted by changing the addition concentration of the silicon additive added to the batch coating resin constituting each layer. preferable.

The optical fiber cable of the present invention is an optical fiber cable comprising one or a plurality of split tape cores and the outer periphery of the split tape core covered with a cable sheath.
Each of the split-type tape cores constitutes a first SUB-UNIT with a first tape core that is formed by coating a plurality of optical fiber strands arranged in parallel with a first-layer batch coating resin, A plurality of first SUB-UNITs are arranged in parallel to be divided into a single layer with a second layer coating resin so as to be divided, thereby forming a second SUB-UNIT, and at least two or more layers n-layer coating resin It is composed of n types of SUB-UNIT units so that they can be divided and integrated,
When the adhesion force between the batch coating resin of the nth layer of the batch coating resin and the batch coating resin of the (n-1) layer is F (n / n-1),
The adhesion between each layer of the batch coating resin is
F (n / n-1) ≤F (n-1 / n-2) ≤ ... ≤F (2/1)
It has the following conditions.

  In the optical fiber cable of the present invention, in the optical fiber cable, it is preferable to adjust the adhesion between the layers of the collective coating resin by changing the concentration of the silicon additive added to the collective coating resin constituting each layer.

In the splitting method of the split-type tape core wire according to the present invention, the first SUB-UNIT is divided by using the first tape core wire in which a plurality of optical fiber strands arranged in parallel are covered with a first layer batch-coated resin as a split unit. A plurality of the first SUB-UNITs are arranged in parallel, and the second SUB-UNIT is formed by covering the first SUB-UNITs with a second layer of batch coating resin so as to be divided, and at least two or more n layers And the n-th batch coating resin and the (n-1) -th batch coating resin. When the adhesive force between the layers is F (n / n-1), the adhesive force between the layers of the batch coating resin is
F (n / n-1) ≤F (n-1 / n-2) ≤ ... ≤F (2/1)
When a split type tape core wire configured with the following conditions is divided into arbitrary SUB-UNITs,
By splitting the split-type tape core wire in the tape thickness direction, only the outermost layer and the inner layer thereof are delaminated to divide into SUB-UNITs, and the same applies to the divided SUB-UNITs as well. This procedure is repeated, and the layers are peeled off one by one from the outermost layer.

  As can be understood from the means for solving the above-described problems, according to the split tape core wire of the present invention, when the split tape core wire is moved in the tape thickness direction, the center of the plurality of optical fiber strands is obtained. Since the line connecting the lines is a rigid neutral line, the outer layer is subjected to greater strain, and peeling between the layers tends to occur. Since the adhesive force between each layer of the batch-coated resin is lower as it goes from the inner layer to the outer layer, only the outer layer can be peeled off, and the peeled layer can be further ironed. It can be easily destroyed and removed. Therefore, it can peel in order from the outermost layer one by one, and can be easily divided into arbitrary SUB-UNITs.

  According to the optical fiber tape cord of the present invention, since the split type tape core wire of the present invention is coded, it can be peeled off layer by layer from the outermost layer of the split type tape core wire for the above reasons. Can be easily divided into arbitrary SUB-UNITs. Moreover, the optical fiber tape cord has a high tensile strength and can be easily divided.

  According to the optical fiber cable of the present invention, since the split tape core wire of the present invention is built in, it can be easily divided into arbitrary SUB-UNITs for the above reasons. It can be divided into SUB-UNIT tape cores, and can be easily connected to the concentric tape cores of other cables.

  Embodiments of the present invention will be described below with reference to the drawings.

  Referring to FIG. 1, as a split-type tape core wire according to this embodiment, for example, a split-type 16-core tape core wire 1 will be described. This split-type 16-core tape core wire 1 is an optical fiber in units of four cores. The strand 3 is once coated with, for example, a 4-core batch UV resin 5 as a batch coating resin, and is converted into a SUB-UNIT into the 4-core tape core wire 7.

  In addition, each said optical fiber strand 3 is coat | covered by 250 resin of UV resin 11 on the outer periphery of the quartz glass 9 of 125 micrometers of φ, for example.

  Further, two of the four-core SUB-UNITs 7 are arranged in parallel and are converted into a SUB-UNIT into an eight-core tape core wire 15 by, for example, an eight-core batch UV resin 13 as a collective coating resin (coupling resin). Further, after the above-described 8-core SUB-UNIT 15 is arranged in parallel, it is coated with, for example, a 16-core batch UV resin 17 as a batch coating resin (coupling resin) to form the split type 16-core tape core wire 1. .

  As described above, the split type 16-core tape core wire 1 has three taped UV resin coating layers including the 4-fiber SUB-UNIT7. That is, the first layer is a 4-core batch UV resin 5, the second layer is an 8-core batch UV resin 13, and the third layer is a 16-core batch UV resin 17.

Taking the above-described split type 16-core tape core 1 as an example, the split-type tape core of this embodiment will be described generally. The split-type tape core is indicated by a downward arrow (↓) in FIG. In this way, they are connected together by a collective UV resin as a collective coating resin (coupling resin) in order from the top, and as the number n of the collective coating resin layers increases, the total core of the split type tape cores increases. The number of lines is 4 cores, 8 cores, 16 cores, ... 2 ^{(n + 1)} cores (when the number of cores in the n-th layer), and the 4 cores of the division unit will increase by a factor of 2. .

  In this embodiment, the 4-core tape core wire corresponds to the first SUB-UNIT as a division unit, the 8-core tape core wire corresponds to the second SUB-UNIT, and similarly, (n− 1) The tape core coated with the batch UV resin of the first layer corresponds to the (n-1) th SUB-UNIT, and the tape core coated with the batch UV resin of the nth layer corresponds to the nth SUB- Corresponds to UNIT.

  The main feature that characterizes the embodiment of the present invention is that the adhesion force between the n-layer batch UV resin and the (n-1) -layer batch UV resin is F (n / n-1). In this case, the split tape core wire having the condition of the following formula (1) is used.

F (n / n-1) ≤F (n-1 / n-2) ≤ ... ≤F (2/1) (1) where n = 3, 4, 5 ... (positive integer). .

  In the split tape core having the above configuration, when the split tape core is placed in the tape thickness direction, the neutral neutral line is a line connecting the centers of the plurality of optical fiber strands 3, so Due to the large strain, delamination is likely to occur. This split tape core has a lower adhesive force between the layers of the batch coating resin on the outer layer side than the inner layer side, so that only the outer layer can be peeled off in the tape thickness direction. Can be easily destroyed and removed by further ironing.

  Incidentally, when dividing into SUB-UNIT as tape cores having an arbitrary number of cores as required, it is important that the layers are peeled off from the outermost layer one by one. If the outermost coating is to be removed, it must be avoided that all of the coating layer is removed. However, in this respect, it is possible to take out any SUB-UNIT by adding iron to the split tape core wire according to the embodiment of the present invention and peeling and removing the outer layer.

  That is, contrary to the downward arrow (↓) at the time of manufacturing in FIG. 1 described above, when dividing at the time of optical fiber cable fusion splicing, as indicated by the upward arrow (↑) at the time of division in FIG. In addition, by sequentially peeling the outermost UV resin of the outermost layer, it is possible to divide the SUB-UNIT or single-core optical fiber 3 at each stage as necessary.

  In order to divide from a split type tape core coated with an n layer batch coating resin to an arbitrary SUB-UNIT, first, the nth layer and (n− 1) Separation of the first layer is caused to divide into (n-1) th SUB-UNITs covered with (n-1) layers of batch coating resin. Further, the (n-1) -th SUB-UNIT is divided into the (n-2) -th SUB-UNIT covered with the (n-2) -layer batch coating resin by rubbing the (n-1) -th SUB-UNIT in the tape thickness direction. . This operation is repeated, and an arbitrary SUB-UNIT is taken out by sequentially peeling and removing the outermost batch UV resin.

  Next, in order to confirm the splitting effect of the split-type tape core wire according to the embodiment of the present invention, a splitting experiment was performed in the above-described 16-core tape core wire 1 by changing the degree of adhesion between layers. The degree of adhesion at this time was adjusted by adjusting the concentration of the silicon-based additive added to the batch UV resin.

  More specifically, when a silicon-based additive is added to the collective UV resin as the collective coating resin (coupling resin), silicon tends to become a high concentration at the interface of the collective coating resin layer. Since a silicon thin film is apparently present between the inner and outer layers of the UNIT, peeling at the interface between the layers tends to occur. By changing the concentration of the silicon-based additive, the peelability at the interface between the layers can be changed, in other words, the adhesion between the layers can be adjusted.

表１及び表２から分かるように、前述した（１）式の密着条件を満たすものでは、全てのサンプルが２通りの両試験において内層の８心ＳＵＢ−ＵＮＩＴ１５の８心一括ＵＶ樹脂１３を剥離させることなく、最外層の１６心一括ＵＶ樹脂１７を除去することが可能であった。 In addition, the ironing to the 16-fiber ribbon 1 as a test sample is performed in the direction of the arrow with a fingernail 19 of a person as shown in FIG. 2, and 1 kgf as shown in FIG. Two types of experiments were performed on a 16-fiber ribbon 1 to which a tension T of 1 mm was applied while applying a 120 ° angle with a steel wire 21 of 1 mmφ. Each test has 10 samples. The results are shown in Table 1 in the former case and in Table 2 in the latter case.

As can be seen from Tables 1 and 2, when all the samples satisfy the contact condition of the above-described formula (1), all the samples peeled the 8-core batch UV resin 13 of the 8-layer SUB-UNIT15 of the inner layer in both two tests. It was possible to remove the 16-core batch UV resin 17 of the outermost layer without causing it to occur.

  For example, in Table 1, F (2/1) adhesion indicates the adhesion between the second-layer 8-core batch UV resin 13 and the first-layer 4-core batch UV resin 5, and F (3/2) ) The adhesion force indicates the adhesion force between the third layer 16-core batch UV resin 17 and the second layer 8-core batch UV resin 13.

  In the adhesion condition A, the relative value of the F (3/2) adhesion force when the relative value of the F (2/1) adhesion force is 1 is 0.5. There are things that satisfy. The contact condition B similarly satisfies the expression (1). As a result, the number of delaminations between the 1st and 2nd layers in the 10 samples is 0 (zero), and the number of delaminations between the 2nd and 3rd layers is 10, so that all the samples are the outermost layers. Only the 16-core batch UV resin 17 could be removed.

  In the adhesion condition C, since the relative value of F (3/2) adhesion force is 1, the adhesion force between the 1, 2, and 3 layers is the same, and the expression (1) is satisfied. However, the result at this time is that the number of delamination between layers 1 and 2 is 1 in 10 samples, and the number of delamination between layers 2 and 3 is 10. 3/2) It can be seen that the relative value of the adhesion is preferably smaller than 1.

  On the other hand, in the contact condition D, the relative value of F (3/2) contact force is 1.2, and in the contact condition E, the relative value of F (3/2) contact force is 1.5. It does not satisfy the adhesion condition of the formula (1). As a result, among the 10 samples, the number of peeled layers between 1 and 2 was 1, the number of peeled layers between 2 and 3 was 1 under the adhesion condition D, and 0 (zero) under the adhesion condition E. Therefore, most of the samples cannot remove the outermost 16-core batch UV resin 17 and cause delamination of one or two layers of SUB-UNIT.

  In Table 2, the results are almost the same as in Table 1.

  The results of Table 1 are shown in the graph of FIG. 4, and the results of Table 2 are shown in the graph of FIG. This graph shows the above points clearly.

  Next, a description will be given of an optical fiber tape cord using the above-described split tape core wire according to the embodiment of the present invention.

  Referring to FIG. 6, for example, a 16-core optical fiber tape cord 23 as an optical fiber tape cord according to this embodiment uses the split type 16-fiber ribbon 1 of FIG. That is, for example, an aramid fiber 25 as a tensile body is arranged on the outer periphery of the 16-fiber ribbon 1 and the periphery of the aramid fiber 25 is used as a jacket such as a polyvinyl chloride resin (PVC). For example, it is covered with a sheath material 27.

  The same applies to the split-type eight-core optical fiber tape cord 29 as an optical fiber tape cord according to another embodiment. That is, as shown in FIG. 7, for example, aramid fibers 25 as tension members are arranged on the outer periphery of the split-type 8-core ribbon 15 of FIG. 1 described above, and the periphery of the aramid fibers 25 is It is covered with a sheath material 27 such as polyvinyl chloride resin (PVC).

  As described above, in the optical fiber tape cord according to this embodiment, a tensile body such as the aramid fiber 25 is disposed on the outer periphery of the split tape core wire according to the above-described embodiment, and around the aramid fiber 25. A sheathed material 27 such as polyvinyl chloride resin (PVC) is coated, and a split type optical fiber tape cord having a tensile strength and easily splittable.

  Next, a description will be given of an optical fiber cable using the above-described split type tape core and optical fiber tape cord according to the embodiment of the present invention.

  The above-described split-type tape core wire according to the embodiment of the present invention and the optical fiber tape cord using the above-described split-type tape core wire are used in an optical fiber cable. Even with different structures, it is possible to perform fusion splicing at the single-core optical fiber strands 3 or 4 cores, or 8 or 16 cores, thereby increasing flexibility.

  For example, referring to FIG. 8, for example, the split type 16-core tape core wire 1 as the split-type tape core wire is laminated in the optical fiber cable 31. For example, in the optical fiber cable 31, a plurality of layers of 16-core ribbons 1 are assembled in a strength member 35 provided at the center of the slot rod 33 and a plurality of slot grooves 37 arranged around the strength member 35. For example, a metal tape 39 as a presser winding is vertically wound around the outer periphery, and the metal tape 39 is sheathed around the outer periphery 41 of a sheath resin or the like.

  The 16-core ribbon 1 as the split-type ribbon is easily divided into two 8-core ribbons 15 by adding iron as shown in FIG. After the 16-core batch UV resin 17 is removed from the core tape core wire 15, each of the eight-core tape core wires 15 is a single core of the plurality of 8-core tape core wires 15 incorporated in the user-system wiring cable 43. The optical fiber 3 is connected to the 8-core tape core fusion splicing portion 45. The user-related wiring cable 43 includes a plurality of eight-core tape cores 15 disposed substantially at the center and two strength members disposed at positions facing the outside of the plurality of eight-core tape cores 15. 47 and a sheath material 49 that covers the outer periphery of the plurality of 8-core tape core wires 15 including the two strength members 47.

  As described above, for example, as a SUB-UNIT divided as necessary from a multi-fiber split-type tape core, for example, a 16-core SUB-UNIT has the same structure as the 16-core tape core 1 of other cables. As a result, mutual fusion splicing is possible. Since the 8-fiber SUB-UNIT has the same structure as the 8-fiber ribbon 15 and the 4-fiber SUB-UNIT has the same structure as the 4-fiber ribbon 7, both can be fusion spliced.

  In addition, this invention is not limited to embodiment mentioned above, It can implement in another aspect by making an appropriate change.

The manufacturing process and division | segmentation process of the split-type tape core wire of embodiment of this invention are shown, and it is a structure sectional drawing of a split-type 16 core tape core wire especially. It is a schematic explanatory drawing of the peeling test of a split type | mold tape core wire. It is a schematic explanatory drawing of the other peeling test of a split type | mold tape core wire. It is a graph which shows the result by the peeling test shown in FIG. It is a graph which shows the result by the peeling test shown in FIG. 1 is a structural cross-sectional view of a 16-core optical fiber tape cord according to an embodiment of the present invention. 1 is a structural cross-sectional view of an 8-core optical fiber tape cord according to an embodiment of the present invention. It is a state explanatory drawing when it connects to an optical cable after dividing | segmenting the 16 core tape core wire of embodiment of this invention. It is a structure sectional view of the conventional edge bond type 8 core tape core wire. It is a cross-sectional view of a conventional capsule-type 8-fiber ribbon. It is a state explanatory view when it is connected to an optical cable after the conventional 8-fiber ribbon is divided. It is a structure sectional view of the conventional split type 16 core tape core wire.

Explanation of symbols

1 Split type 16-fiber ribbon (split tape)
3 Optical fiber 5 4-core batch UV resin (collective coating resin)
7 Split-type 4-core tape core (split-type tape core)
13 8-core batch UV resin (collective coating resin)
15 Split-type 8-core ribbon (split-type ribbon)
17 16-core batch UV resin (collective coating resin)
23 16-core optical fiber tape cord (split type optical fiber tape cord)
25 Aramid fiber (strength)
27 Sheath material (jacket)
29 Eight-core optical fiber tape cord 31 Optical fiber cable 35 Strength member 37 Slot groove 39 Metal tape (presser winding)
41 Outer sheath 43 Wiring cable 45 8 core tape core fusion splicing part

Claims (7)

A first SUB-UNIT is configured with a first tape core wire in which a plurality of optical fiber strands arranged in parallel are coated with a first layer of batch coating resin, and a plurality of the first SUB-UNITs are arranged in parallel. The second SUB-UNIT is configured by being integrally coated with the second layer batch coating resin so that it can be divided into at least two layers or more of the n layer batch coating resin in n types of SUB-UNIT units. It is configured by covering it in one piece so that it can be divided,
When the adhesion force between the batch coating resin of the nth layer of the batch coating resin and the batch coating resin of the (n-1) layer is F (n / n-1),
The adhesion between each layer of the batch coating resin is
F (n / n-1) ≤F (n-1 / n-2) ≤ ... ≤F (2/1)
A split-type tape core wire characterized by having the following conditions:   2. The split tape core wire according to claim 1, wherein the adhesive force between the layers of the batch coating resin is adjusted by changing the addition concentration of the silicon additive added to the batch coating resin constituting each layer. A first SUB-UNIT is configured with a first tape core wire in which a plurality of optical fiber strands arranged in parallel are coated with a first layer of batch coating resin, and a plurality of the first SUB-UNITs are arranged in parallel. The second SUB-UNIT is configured by being integrally coated with the second layer batch coating resin so that it can be divided into at least two layers or more of the n layer batch coating resin in n types of SUB-UNIT units. In addition to being integrally coated so as to be separable, the adhesion force between the n-th batch coating resin and the (n-1) -th batch coating resin is F (n / n-1). ), The adhesion between the layers of the batch coating resin is
F (n / n-1) ≤F (n-1 / n-2) ≤ ... ≤F (2/1)
A split-type tape core wire configured with the following conditions:
An optical fiber tape cord comprising: a tension member disposed on an outer periphery of the split tape core; and a jacket covering the periphery of the tension member.   4. The optical fiber tape cord according to claim 3, wherein the adhesion force between the layers of the batch coating resin is adjusted by changing the concentration of the silicon additive added to the batch coating resin constituting each layer. In an optical fiber cable comprising one or a plurality of split tape cores and the outer periphery of the split tape core covered with a cable sheath,
Each of the split-type tape cores constitutes a first SUB-UNIT with a first tape core that is formed by coating a plurality of optical fiber strands arranged in parallel with a first-layer batch coating resin, A plurality of first SUB-UNITs are arranged in parallel to be divided into a single layer with a second layer coating resin so as to be divided, thereby forming a second SUB-UNIT, and at least two or more layers n-layer coating resin It is composed of n types of SUB-UNIT units so that they can be divided and integrated,
When the adhesion force between the batch coating resin of the nth layer of the batch coating resin and the batch coating resin of the (n-1) layer is F (n / n-1),
The adhesion between each layer of the batch coating resin is
F (n / n-1) ≤F (n-1 / n-2) ≤ ... ≤F (2/1)
An optical fiber cable having the following conditions:   6. The optical fiber cable according to claim 5, wherein the adhesion between the layers of the collective coating resin is adjusted by changing the concentration of the silicon additive added to the collective coating resin constituting each layer. A first SUB-UNIT is configured with a first tape core wire in which a plurality of optical fiber strands arranged in parallel are coated with a first layer of batch coating resin, and a plurality of the first SUB-UNITs are arranged in parallel. The second SUB-UNIT is configured by being integrally coated with the second layer batch coating resin so that it can be divided into at least two layers or more of the n layer batch coating resin in n types of SUB-UNIT units. In addition to being integrally coated so as to be separable, the adhesive force between the n-th batch coating resin and the (n-1) -th batch coating resin is F (n / n- When 1), the adhesion between the layers of the batch coating resin is
F (n / n-1) ≤F (n-1 / n-2) ≤ ... ≤F (2/1)
When a split type tape core wire configured with the following conditions is divided into arbitrary SUB-UNITs,
By splitting the split-type tape core wire in the tape thickness direction, only the outermost layer and the inner layer thereof are delaminated to divide into SUB-UNITs, and the same applies to the divided SUB-UNITs as well. A method of dividing a split type tape core wire, which is performed by repeating the above procedure and separating the layers one by one from the outermost layer.

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