JP2016040563A - Optical fiber cable and wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical fiber cable and wire harness that can prevent an optical fiber cable from transition to an optical fiber strand without requiring other members such as a sheath material and the like.SOLUTION: An optical fiber cable 1 has: an optical fiber strand 2; and a cable clad layer 3 that clads a periphery of the optical fiber strand. The optical fiber cable 1 is configured in such a way that between the optical fiber strand 2 and the cable clad layer 3, an intermediate sheet 5 is wound that has a plasticizer transition preventive film formed of resin with a solubility parameter equal to or more than 10, in which the intermediate sheet 5 is wound so that an overlapping part 6 having either end side in a circumferential direction of the optical fiber cable 1 overlaid is formed, and the overlapping part 6 is adhered via an adhesive agent layer 7, setting a front surface of one end side of the intermediate sheet 5 and a rear surface of other end side thereof as a bonding surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an optical fiber cable and a wire harness using the optical fiber cable.

  Conventionally, an optical fiber cable using an optical fiber (sometimes referred to as an optical fiber) is known (for example, see Patent Document 1). As shown in FIG. 10, the optical fiber cable 101 includes an optical fiber 102, a tensile body 103 formed along the optical fiber 102, and a cable covering the periphery of the optical fiber 102 and the tensile body 103. And a coating layer 104.

  The optical fiber 102 is composed of, for example, a core that transmits light, a cladding that covers the periphery of the core, and an optical fiber coating layer that covers the periphery of the cladding. For the coating layer, an ultraviolet curable resin or the like is used.

  When the optical cable covering layer 104 contracts, the optical fiber meanders and optical transmission loss increases, so that it is required that the optical cable covering layer 104 be difficult to contract. In addition, the cable covering layer 104 is required to be flexible in order to facilitate the handling of the optical fiber cable 101.

  In Patent Document 1, a resin in which a polypropylene elastomer is mixed with a polypropylene polymer is used as a material for the cable covering layer 104 with improved flexibility.

JP 2013-250499 A

  In an in-vehicle wire harness mounted on a vehicle or the like, an insulated wire and an optical fiber cable may be bundled with a binding material or the like and used in a state of being in contact with each other. In the insulated wire, for example, the periphery of a conductor such as a copper wire is covered with an insulating material such as a soft polyvinyl chloride resin. The soft polyvinyl chloride resin used for the insulating material contains a plasticizer.

  In the state where the insulated wire and the optical fiber cable are in contact with each other in the wire harness, there has been a problem that the plasticizer in the polyvinyl chloride resin moves to the cable coating layer of the optical fiber cable over time. The plasticizer transferred to the cable coating layer is further transferred to the optical fiber coating layer of the optical fiber, and the optical fiber coating layer swells to cause cracks or breakage. Thus, if a crack occurs or breaks in the optical fiber coating layer, the protective function of the optical fiber, transmission characteristics, etc. are adversely affected.

  In addition, when a wire harness is configured, a separate exterior material such as a corrugated tube is attached around the optical fiber cable 101 in order to prevent the plasticizer from transferring from the insulated wire to the optical fiber cable. The construction of wire harnesses has also been performed. However, attaching the exterior material around the optical fiber cable 101 as described above requires another component, and further increases the number of attachment steps, resulting in an increase in material cost and work cost.

  Furthermore, it is difficult to form an exterior material or the like without a gap over the entire circumference of the optical fiber cable 101, and it is inevitable that a portion that is not covered by the exterior material will appear. If it does so, a plasticizer will transfer to the optical fiber cable 101 from the part, and it is difficult to prevent a plasticizer transfer reliably.

  The present invention has been made to eliminate the above-described drawbacks of the prior art, and does not require other members such as an exterior material, and the optical fiber cable itself prevents the transition of the plasticizer to the optical fiber strand. It is an object of the present invention to provide an optical fiber cable and a wire harness that can be used.

The optical fiber cable of the present invention is
In an optical fiber cable having an optical fiber and a cable covering layer covering its periphery,
An intermediate sheet having a plasticizer migration prevention film formed of a resin having a solubility parameter of 10 or more is wound between the optical fiber and the cable coating layer,
The intermediate sheet is wound so that an overlap portion is formed by overlapping both ends in the circumferential direction of the optical fiber cable.
The gist of the present invention is that the overlap portion is bonded via an adhesive layer with the one end portion side surface and the other end portion back surface of the intermediate sheet as a bonding surface.

  In the optical fiber cable of the present invention, it is preferable that the intermediate sheet has an adhesive layer that can be bonded to the other surface of the intermediate sheet on at least one surface of the overlap portion. .

  In the optical fiber cable of the present invention, the plasticizer migration prevention film is preferably a film formed of a resin selected from the group consisting of polybutylene terephthalate, polyethylene terephthalate, polyethylene naphthalate, polyamide, and polyimide.

  In the optical fiber cable of the present invention, it is preferable that the intermediate sheet has a covering adhesive layer having adhesiveness with the cable covering layer.

  In the optical fiber cable of the present invention, it is preferable that the intermediate sheet has a metal foil layer.

  In the optical fiber cable of the present invention, it is preferable to have a tensile body inside the cable coating layer.

  In the optical fiber cable of the present invention, it is preferable that the material of the cable covering layer is a polyolefin resin.

  In the optical fiber cable of the present invention, it is preferable that the optical fiber has a core that transmits light, a cladding that covers the periphery of the core, and an optical fiber coating layer that covers the periphery of the cladding.

  The wire harness of this invention makes it a summary to have said optical fiber cable.

  The wire harness of this invention can be comprised so that the insulated wire which has the insulation coating containing a plasticizer may be arrange | positioned in the state which contacted the said optical fiber cable.

  In the optical fiber cable of the present invention, an intermediate sheet having a plasticizer migration preventing film formed of a resin having a solubility parameter of 10 or more is wound between the optical fiber and the cable coating layer. It is possible to prevent the plasticizer contained in the other material or the like from being transferred to the optical fiber without using any other member.

  Further, the intermediate sheet is wound so that an overlap portion is formed by overlapping both ends in the circumferential direction of the optical fiber cable, and the overlap portion is on one end side of the intermediate sheet. By adopting a configuration where the front surface and the other end side back surface are bonded via an adhesive layer, the overlap portion of the intermediate sheet is bonded, so the intermediate sheet is inside the skin layer. Can maintain a state in which the entire circumference of the optical fiber is covered.

  On the other hand, in the case of an optical fiber cable that does not adhere the overlap portion of the intermediate sheet, when the optical fiber cable is bent or the like, the overlap portion of the intermediate sheet overlaps at the overlap portion of the intermediate sheet in the circumferential direction. Shifts and a gap is generated. If the overlap portion of the sheet end portion of the overlap portion of the intermediate sheet is shifted and a gap is generated, the plasticizer migration preventing film cannot completely cover the periphery of the optical fiber sheet. If it does so, the plasticizer of a coating layer will transfer to the optical fiber strand side from the said clearance gap part. This plasticizer deteriorates with respect to the optical fiber coating layer of the optical fiber, and deteriorates the optical fiber coating.

  In the optical fiber cable of the present invention, even when the cable is bent, since the overlap portion of the intermediate sheet is bonded, it is possible to prevent the portion from peeling off, and the plasticizer for the intermediate sheet The effect of preventing the migration of the plasticizer by the migration preventing film is not lowered. Therefore, it is possible to maintain the performance of the optical fiber cable for a long time.

  Since the wire harness of the present invention has the above-described optical fiber cable, it prevents a plasticizer from being transferred from other materials at the time of use, and does not deteriorate the characteristics of the optical fiber cable. Can be maintained. Further, when the wire harness is used in a state where the insulated wire having an insulation coating containing a plasticizer and the optical fiber cable are in contact with each other, the optical fiber coating layer of the optical fiber is included in the insulation coating of the insulated wire. It is possible to satisfactorily prevent the plasticizer from migrating.

FIG. 1 is a sectional view showing an example of an optical fiber cable according to the present invention. FIG. 2 shows an example of an intermediate sheet used in the optical fiber cable of FIG. 1, (a) is an external perspective view, and (b) is a perspective view showing a wound state. FIGS. 3A and 3B are views corresponding to the longitudinal section taken along the line AA of FIG. 2A, which shows an embodiment of the intermediate sheet and is a cross section in the circumferential direction of the optical cable. 4A and 4B are cross-sectional views showing an embodiment of the intermediate sheet. FIG. 5 is an enlarged cross-sectional view of an overlap portion using the intermediate sheet of FIG. FIG. 6 is a cross-sectional view showing a modification of the intermediate sheet in FIG. FIG. 7 is a cross-sectional view showing another aspect of the intermediate sheet. FIG. 8 is a cross-sectional view showing an enlarged state of an optical fiber used in the optical fiber cable of FIG. FIG. 9 is a perspective view showing an appearance of an example of the wire harness of the present invention. FIG. 10 is a cross-sectional view showing a conventional optical fiber cable.

  Examples of the present invention will be described in detail below. FIG. 1 is a sectional view showing an example of an optical fiber cable according to the present invention. As shown in FIG. 1, an optical fiber cable (hereinafter sometimes simply referred to as an optical cable) 1 has an optical fiber 2 and a cable coating layer 3 that covers the periphery of the optical fiber 2. The cable covering layer 3 is formed in a round cylindrical shape that covers the outside of the strength member 4.

  The cable covering layer 3 covers the outer periphery of the optical fiber 2 and is formed as a sheath for protecting the optical fiber 2. The cable covering layer 3 is formed as the outermost layer of the optical cable and has a function as a protective material for the entire optical cable 1.

  The cable covering layer 3 may be formed in a loose structure by covering the underlying strength member 4 and the optical fiber 2 in a loose state that is not tightened, or may be covered in a close contact state.

  Between the optical fiber 2 and the tensile body 4 and the coating layer 3 on the outer periphery thereof, a plastic having a solubility parameter (hereinafter also referred to as “SP value”) of 10 or more is formed. An intermediate sheet 5 having an agent migration preventing film is provided and is wound around the tensile body 4.

  2 shows an example of an intermediate sheet used in the optical fiber cable of FIG. 1, (a) is an external perspective view, and (b) is after the intermediate sheet is wound around an optical fiber and a tension member. It is a perspective view which shows this state typically. As shown in FIGS. 1 and 2 (a) and 2 (b), both ends in the circumferential direction of the optical fiber cable 1 of the intermediate sheet 5 are overlapped and overlapped so that an overlap portion 6 is formed. It has been turned. The overlap portion 6 includes a surface-side joining portion 6a formed on one end side of one surface 5A of the intermediate sheet 5 (for convenience, this surface is referred to as a surface 5A of the intermediate sheet 5), and the intermediate sheet 5 The bonding portion 6b on the back surface side formed on the other end portion side of the opposite surface 5B (for convenience, this surface is referred to as the back surface 5B of the intermediate sheet 5) is bonded via the adhesive layer 7. Yes. Since the overlap portion of the intermediate sheet is bonded in this manner, even if the optical fiber 2 and the tensile body 4 move inside the optical cable 1, there is no possibility that the overlap portion is peeled off and a gap is formed. .

  The overlap portion 6 of the intermediate sheet 5 is formed in a continuous band shape without a break between both ends in the longitudinal direction of the optical cable 1. The overlap portion 6 is formed in a band shape having a constant width from the end portion in the longitudinal direction of the optical cable 1. The width OL in the circumferential direction of the portion where the intermediate sheet of the overlap portion 6 overlaps (also referred to as the width of the overlap portion) may be a length that does not peel off the joining surface of the end portion of the intermediate sheet 5, There is no particular limitation. For example, when the overlap portion width OL is formed to be about 1.0 to 2.0 mm, it is possible to reliably bond the joint portion, and the flexibility of the optical cable is not impaired. It is preferable from the viewpoint of suppressing deterioration of the appearance due to.

  The intermediate sheet 5 is wound so that the front surface 5A of the intermediate sheet is in contact with the coating layer 3 as an outer surface, and the back surface 5B of the intermediate sheet is in contact with the strength member 4 as an inner surface.

  3 (a) and 3 (b) show an aspect of the intermediate sheet, and are sectional views in the circumferential direction of the optical cable corresponding to the section along the line AA in FIG. 2 (a). The intermediate sheet 5 shown to Fig.3 (a) is comprised from the plasticizer transfer prevention film 8 and the adhesive bond layer 7 currently formed in the junction part 6a of this film surface.

  The intermediate sheet 5 shown in FIG. 3B is an example in which the adhesive layer 7 is formed on the entire surface of the plasticizer migration prevention film 8 (the surface of the intermediate sheet). The adhesive layer 7 only needs to cover at least the overlap portion 6 as shown in FIG. 2A, but may be formed on the entire surface as shown in FIG. 2B.

  As the plasticizer migration prevention film 8, a film formed of a resin having an SP value of 10 or more is used. Specific resins for the plasticizer migration prevention film 8 include polybutylene terephthalate (10.0), polyethylene terephthalate (10.7), polyethylene naphthalate (10.7), polyamide 6 (12.7), polyimide ( 13.1). The SP value is shown in parentheses.

  The plasticizer added to the insulation-coated polyvinyl chloride resin such as an insulated wire is usually diisononyl phthalate (DIDP) or dioctyl phthalate (DOP). The SP value of these plasticizers is 8.9. The SP value of the polypropylene resin used for the cable covering layer 3 and the like is 7.9. On the other hand, if the SP value of the plasticizer migration prevention film is 10 or more, the difference from the SP value of the plasticizer becomes large, and even if the plasticizer migrates to the coating layer 3, the plasticizer migration prevention film 8 is removed. It is possible to prevent migration through transmission.

  The thickness of the plasticizer migration preventing film 8 is not particularly limited as long as the plasticizer migration prevention film 8 can prevent the migration of the plasticizer.

  The adhesive used for the adhesive layer 7 is not particularly limited as long as it can adhere the joint 6 a on the front surface of the intermediate sheet 6 and the joint 6 b on the back surface. The adhesive of the adhesive layer 7 may be applied to a predetermined position of the overlap portion 6 to form the adhesive layer 7 when the intermediate sheet 6 is wound, and the overlap portion 6 may be bonded. It is also possible to form the adhesive layer 7 in advance using a hot melt adhesive or the like on the front surface joining portion 6a or the back surface joining portion 6b of the intermediate sheet 5.

  When the adhesive layer 7 is formed on the intermediate sheet 5, the adhesive layer 7 may be formed on either the front surface or the back surface of the intermediate sheet, or on both the front surface and the back surface. The adhesive layer 7 formed on one side of the intermediate sheet 5 may be bonded to the other side of the intermediate sheet 5. As the adhesive of the adhesive layer 7, various known adhesives such as a reaction curable adhesive and a hot melt adhesive can be used.

  4A and 4B are cross-sectional views showing other embodiments of the intermediate sheet. The intermediate sheet 5 may be composed only of the plasticizer migration preventing film 8 and the adhesive layer 7, but may be laminated with other layers. For example, the intermediate sheet 5 shown in FIG. 4A is provided on one surface of a PET film having a thickness of 16 μm as a plasticizer migration preventing film 8 and a urethane-based two-component reactive adhesive having a thickness of 3 μm as an adhesive layer 9a. And a coated adhesive layer made of a hot melt adhesive having a thickness of 5 μm, having a metal foil layer 9 made of aluminum foil having a thickness of 15 μm, and having adhesion to the cable coating layer 3 on the entire surface opposite to the plasticizer migration preventing film 8. 3a is laminated. Further, an adhesive layer 7 is formed on the surface of the metal foil layer 9 of the intermediate sheet 5. As the adhesive layer 7, a polyurethane-based two-component curable adhesive having a thickness of 3.0 μm was used. The position where the adhesive layer 7 is formed is a position corresponding to the joint 6 a on the back surface of the intermediate sheet 5.

  Further, in the intermediate sheet shown in FIG. 4B, the intermediate sheet of the aspect shown in FIG. 4A is formed only at the position where the adhesive layer corresponds to the joint portion on the back surface of the intermediate sheet. The difference is that the adhesive layer 7 is formed on the entire outer surface of the metal foil layer 9, which is the entire back surface of the intermediate sheet 5.

  By providing the metal foil layer 9 on the intermediate sheet 5, shrinkage of the plasticizer migration prevention film 8 can be suppressed. Further, the metal foil layer 9 can improve the plasticizer migration preventing effect of the intermediate sheet 5. The material of the metal foil layer 9 can be used without particular limitation. Examples of the metal foil used for the metal foil layer 9 include a copper foil, an aluminum foil, and other metal foils. Among these, aluminum foil is a preferable material because it is inexpensive and can avoid the influence of copper damage. The thickness of the metal foil layer 9 can be formed to about 10 to 25 μm.

  In order to laminate the metal foil layer 9 on the surface of the plasticizer migration preventing film 8, it is preferable to laminate and bond the metal foil layer 9 via the metal foil adhesive layer 9a. As an adhesive for the metal foil adhesive layer 9a, for example, a reaction curable adhesive such as a two-component curable urethane adhesive can be used. The metal foil adhesive layer 9a can be formed to a thickness of about 2.0 to 4.0 μm.

  As the covering adhesive layer 3 a provided on the surface of the plasticizer migration prevention film 8, an adhesive having adhesiveness to the cable covering layer 3 is used. The adhesive for the covering adhesive layer 3 a can be appropriately selected according to the material of the cable covering layer 3. For example, when an olefin resin such as a polypropylene resin is used for the cable covering layer 3, it is preferable to use a hot melt adhesive such as an ethylene-vinyl acetate copolymer.

  As the adhesive layer 7, an adhesive capable of bonding the metal foil layer 9 and the covering adhesive layer 3a can be used. For example, when an aluminum foil is used for the metal foil layer 9 and an ethylene-vinyl acetate copolymer is used for the covering adhesive layer 3a, the adhesive of the adhesive layer 7 is, for example, a urethane-based two-component reactive adhesive or the like Is used.

  FIG. 5 is an enlarged cross-sectional view of the overlap portion of the intermediate sheet in FIG. FIG. 5 shows a state before the overlap portion is bonded. As shown in FIG. 5A, in the overlap portion 6 of the intermediate sheet 5, the covering adhesive layer 3a at the front surface bonding portion and the adhesive layer 7 at the back surface bonding portion are bonded.

  FIG. 6 is a cross-sectional view showing a modification of the intermediate sheet in FIG. The intermediate sheet 5 shown in FIG. 6 is obtained by laminating a film layer 8a made of a PET film having a thickness of 16 μm on the surface of the adhesive layer 7a in the overlap portion. The film layer 8 a uses the same film as the PET film of the plasticizer migration prevention film 8. As the adhesive for the adhesive layer 7a, an adhesive between an aluminum foil and a PET film is used. The other configuration is the same as that of the intermediate sheet 5 in FIG. By forming the film layer 8a on the surface of the adhesive layer 7a, there is an advantage that the adhesiveness with the resin layer 3a is good.

  FIG. 7 is a cross-sectional view of another embodiment of the intermediate sheet. The intermediate sheet 5 in FIG. 7 has the same configuration as the intermediate sheet 5 shown in FIGS. 4A and 4B except that the adhesive layer 7 is excluded. The intermediate sheet 5 of FIG. 7 is an aspect in which the adhesive layer 7 is not formed in the overlap portion. Although the intermediate sheet 5 can be used in such a form, it is necessary to apply the adhesive while applying an adhesive when the optical cable is assembled.

  When the intermediate sheet 5 is to be wound, the covering adhesive layer 3a and the metal foil layer 9 come into contact with each other at the front surface joining portion and the back surface joining portion, but the covering adhesive layer 3a is in contact with the metal foil layer 9. Since it does not have adhesiveness, it cannot be bonded at the overlap portion. When this intermediate sheet 5 is used, when the intermediate sheet is wound, an adhesive that can be bonded to the metal foil layer 9 and the covering adhesive layer 3a is applied to the overlap portion, and the overlap portion is bonded and bonded. To do.

  The cable coating layer 3 can be made of a flexible resin that has been conventionally used as a coating layer for this type of optical cable. Examples of the resin having flexibility of the cable covering layer include polyolefin resins such as polyethylene resin and polypropylene resin. The cable covering layer 3 preferably does not contain a plasticizer and uses a low shrinkage resin. Examples of the resin having excellent flexibility and low shrinkage used for the cable covering layer 3 include polypropylene resins and olefin thermoplastic elastomers.

  The olefin-based thermoplastic elastomer uses a polyolefin component such as polypropylene or polyethylene as a hard segment as a hard segment and a rubber component such as EPDM as a soft segment. Olefin-based thermoplastic elastomers include a simple blend type in which a resin component and a rubber component are simply blended, and a cross-linked type in which crosslinking is performed simultaneously with blending.

  Further, in order to impart flame retardancy to the cable covering layer 3, a flame retardant, other additives, and the like may be added. Examples of the flame retardant include magnesium hydroxide, non-decabrominated brominated flame retardant, and antimony trioxide. Examples of other additives include antioxidants and copper damage inhibitors.

  The thickness of the cable coating layer 3 is not particularly limited. For example, when the diameter of the optical fiber 2 is formed to about 200 to 500 μm, the thickness of the cable covering layer 3 can be formed to about 0.3 to 0.5 mm.

  FIG. 8 is a cross-sectional view showing an enlarged state of an optical fiber used in the optical cable of FIG. The optical fiber 2 includes a core 21 made of quartz glass or plastic having a high light transmittance, a cladding 22 having a lower refractive index than the core covering the periphery of the core 21, and an ultraviolet ray covering the periphery of the cladding 22. And an optical fiber coating layer 23 made of a cured material such as a curable material. As the optical fiber 2, a known one can be used.

  The wire diameter of the optical fiber 2 is not particularly limited, and an appropriate wire diameter can be selected according to the application. For example, the diameter of the core 21 is formed to be about 50 to 80 μm. The diameter of the clad 22 is formed to about 100 to 160 μm. The diameter of the optical fiber coating layer 23 is formed to about 200 to 300 μm.

  The strength member 4 is a reinforcing member formed along the optical fiber 2 and is provided to prevent the optical fiber 2 from bending with an excessively large curvature. Known strength members 4 can be used. The strength member 4 of the optical cable shown in FIG. 1 is configured by being filled with aramid fibers, covers the periphery of the optical fiber 2, and is filled inside the intermediate sheet 5.

  The tensile body 4 may use a metal wire, a long fiber-reinforced plastic member, or the like in addition to the aramid fiber. In the case of the filling state shown in FIG. 1, the strength member 4 has a thickness of about 0.4 to 0.7 mm.

  In order to manufacture the optical cable 1, the optical fiber 2 is arranged along the tensile body 4 and fed from a feeding machine or the like, the intermediate sheet 5 is wound, and the overlap portion 6 is bonded via an adhesive layer. In the case of a hot melt adhesive, for example, the adhesive layer 7 can be bonded by heating and cooling processes. Then, the optical cable 1 can be obtained by forming the cable covering layer 3 by extruding the resin constituting the cable covering layer 3 around the intermediate sheet 5 from the die and covering the periphery.

  Although not particularly illustrated, the optical cable 1 of the present invention has a plurality of optical fiber wires 2 arranged side by side around the strength member 4, and the periphery is covered with an intermediate sheet 5. You may coat | cover with the cable coating layer 3, and you may comprise. The number of the optical fiber strands 2 and the arrangement of the optical fiber strands 2 and the strength members 4 are not particularly limited.

  Hereinafter, the wire harness of the present invention will be described. The wire harness of the present invention uses the above optical cable. FIG. 9 is a perspective view showing an appearance of an example of the wire harness of the present invention. The wire harness 10 shown in FIG. 9 includes three optical cables 1, 1, 1 and three insulated wires 13, 13, 13 that are bundled and integrated by a binding material 14. In the wire harness 10, the optical cable 1 is disposed in contact with the insulated wire 13.

  The insulated wire 13 has a conductor 11 such as a copper wire covered with an insulating coating 12 such as polyvinyl chloride resin. The polyvinyl chloride resin of the insulating coating 12 contains a plasticizer such as DIDP or DOP. In the wire harness 10, the plasticizer of the insulating coating 12 tries to migrate to the optical cable 1 that is in contact, but the plasticizer migration prevention film 8 of the intermediate sheet 5 is made of a material having an SP value of 10 or more. Therefore, it is possible to prevent the plasticizer from moving from the cable coating layer 3 to the optical fiber coating layer 23 of the optical fiber 2.

  Examples of the binding material 14 of the wire harness 10 include an adhesive tape using polyvinyl chloride, a binding belt using polyamide 66, and the like.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

  For example, in the wire harness of the above-described embodiment, three optical cables and four insulated wires are bundled, but the number of optical cables and insulated wires is not limited to the above aspect.

1 Optical fiber cable (optical cable)
2 Optical fiber strand 21 Core 22 Clad 23 Optical fiber coating layer 3 Cable coating layer 4 Strength member 5 Intermediate sheet 6 Overlap portion 7 Adhesive layer 8 Plasticizer migration prevention film 9 Metal foil layer 10 Wire harness 11 Conductor 12 Insulation coating 13 Insulated wire 14 Binder

Claims (10)

In an optical fiber cable having an optical fiber and a cable covering layer covering its periphery,
An intermediate sheet having a plasticizer migration prevention film formed of a resin having a solubility parameter of 10 or more is wound between the optical fiber and the cable coating layer,
The intermediate sheet is wound so that an overlap portion is formed by overlapping both ends in the circumferential direction of the optical fiber cable.
The optical fiber cable, wherein the overlap portion is bonded via an adhesive layer with the one end side surface and the other end side back surface of the intermediate sheet as a bonding surface.   2. The intermediate sheet according to claim 1, wherein an adhesive layer capable of adhering to the other surface of the intermediate sheet is formed on at least one surface of the overlap portion. Fiber optic cable.   The plasticizer migration prevention film is a film formed of a resin selected from the group consisting of polybutylene terephthalate, polyethylene terephthalate, polyethylene naphthalate, polyamide, and polyimide. Fiber optic cable.   The optical fiber cable according to any one of claims 1 to 3, wherein the intermediate sheet has a coating adhesive layer having adhesiveness with the cable coating layer.   The optical fiber cable according to claim 1, wherein the intermediate sheet has a metal foil layer.   The optical fiber cable according to any one of claims 1 to 5, further comprising a tensile body inside the cable covering layer.   The optical fiber cable according to any one of claims 1 to 6, wherein a material of the cable covering layer is a polyolefin resin.   The said optical fiber strand has the core which transmits light, the clad which covers the circumference | surroundings of this core, and the optical fiber coating layer which coat | covers the circumference | surroundings of this clad, The any one of Claims 1-7 characterized by the above-mentioned. An optical fiber cable as described in 1.   A wire harness comprising the optical fiber cable according to claim 1.   The wire harness according to claim 9, wherein an insulated wire having an insulating coating containing a plasticizer is disposed in contact with the optical fiber cable.

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