JP2015038857A - Communication cable containing discontinuous shield tape and discontinuous shield tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent external interference between adjacent cables, reduce reflection loss and prevent a discontinuous shield tape from being broken easily.SOLUTION: A communication table includes a core part containing a plurality of twisted parts composed of a pair of insulation-coated conductor wires, a separator separating the twisted parts contained in the core part from one another, a discontinuous shield tape surrounding the core part and a sheath part surrounding the outside of the shield tape. The discontinuous tape includes a conductive metal layer and a non-conductive synthetic resin material layer, and the conductive metal layer is laminated on the non-conductive synthetic resin material layer. The discontinuous shield tape includes continuous parts in which the conductive metal layer is formed continuously in the non-conductive synthetic resin material layer and discontinuous parts in which the conductive metal layer is cut off between adjacent continuous parts, and the continuous parts are formed in the range of the length of 1-5 m.

Description

  The present invention relates to a communication cable including a discontinuous shield tape and a discontinuous shield tape, and more particularly, to a communication cable and a discontinuity configured to prevent external interference between adjacent cables and reduce reflection loss. Related to shield tape.

  In general, a UTP cable (or LAN cable) used as a communication cable is formed by twisting a conductor formed by coating a conductor such as copper with an insulator in a spiral manner to form a stranded portion. It is comprised in the form which covered in the state which gathered four twisted wire parts, and formed the core part, and is also called an unshielded pair cable.

  Recently, with the development of information communication technology such as ATM and Ethernet (registered trademark), such UTP cable has been increasing its information transmission capability as an important issue. Development has been done in the direction to realize.

  On the other hand, according to global regulations, the UTP cable is classified according to a signal transmission capability according to a category (Category or Cat.) Identification symbol and a number, and the larger the number, the higher the transmission characteristics. For example, Cat. The grade 5 communication cable has a transmission speed of 100 Mbps in a signal transmission band of 100 MHz, Cat. The grade 6 communication cable has a transmission band of 250 MHz and a transmission speed of 1 Gbps. The 6A grade communication cable has a transmission band of 500 MHz and a transmission speed of 10 Gbps.

  Cat. In the 6A grade communication cable, crosstalk between adjacent communication cables is an important factor in determining the data transmission characteristics of the communication cable, in addition to crosstalk between the stranded portions included in the cable.

  In other words, if the crosstalk between adjacent cables is not reduced appropriately, the electrical characteristics required by the standard are not satisfied, and the stable communication quality required by the grade cannot be ensured.

  As a method for solving this problem, US Pat. No. 7,238,886 proposes a method of forming a channel space in a sheath portion in order to increase the distance between twisted wire portions arranged in adjacent cables. However, with this method, the outer diameter of the entire cable is increased, which limits the number of cables that can be installed in the same space.

  On the other hand, as another method for reducing the crosstalk between adjacent cables, Japanese Patent Application Laid-Open No. 2006-032193 presents a method of surrounding the outside of the stranded portion with a metal shield tape. In such a method, an earth connector for grounding an electromagnetic wave transmitted from the shield tape is required for a cable having a certain length.

  Therefore, development of a communication cable configured to reduce crosstalk between adjacent cables and to reduce reflection loss during data transmission from the cable is eagerly desired.

U.S. Pat. No. 7,238,886 JP 2006-032193 A

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a communication cable including a discontinuous shield tape configured to prevent external interference between adjacent cables and reduce reflection loss, and It is to provide a discontinuous shield tape.

  Another object of the present invention is to provide a communication cable and a discontinuous shield tape including a discontinuous shield tape configured to exhibit a greater resistance to a tensile force applied from the outside. .

  Another object of the present invention is to provide a communication cable and a discontinuous shield tape including a discontinuous shield tape that is easy to manufacture and has high formability.

In order to achieve the above object, a communication cable including a discontinuous shield tape according to the present invention includes a core portion including a plurality or a plurality of pairs of twisted wire portions formed by twisting a pair of insulation-coated conductive wires, A separator for separating the plurality of pairs of twisted wire portions included in the core portion, a discontinuous shield tape surrounding the core portion, and a sheath portion surrounding an outer peripheral portion of the discontinuous shield tape; In the communication cable including, the discontinuous shield tape includes a conductive metal layer and a nonconductive synthetic resin material layer, and the conductive metal layer is laminated on the nonconductive synthetic resin material layer,
The discontinuous shield tape includes a continuous portion where the conductive metal layer is continuously formed in the non-conductive synthetic resin material layer, and the conductive metal layer is disconnected between adjacent continuous portions. The discontinuous part is formed, and the continuous part is formed in the range of 1 to 5 m.

  In the present invention, the discontinuous portion is formed with a width of 0.5 to 5 m.

  In the present invention, a ratio (L / D) of the length L of the continuous portion to the width D of the discontinuous portion is formed to be 200 to 50000.

  In the present invention, the width of the continuous portion is 20 to 25 mm.

  In the present invention, the conductive metal layer is an aluminum or aluminum alloy layer.

  In the present invention, the non-conductive synthetic resin material layer is a PET material.

  To achieve the above object, a communication cable including a discontinuous shield tape according to one aspect of the present invention includes a core portion including a plurality of twisted wire portions formed by twisting a pair of insulated wires. A separator for separating a plurality of stranded portions included in the core portion from each other, a discontinuous shield tape surrounding the core portion, a sheath portion surrounding an outer (circumferential) portion of the discontinuous shield tape, The discontinuous shield tape includes a conductive metal layer and a non-conductive synthetic resin material layer, and the conductive metal layer is laminated on the non-conductive synthetic resin material layer. The discontinuous shield tape includes a continuous portion where the conductive metal layer is continuously formed in the non-conductive synthetic resin material layer, and the conductive metal layer is disconnected between adjacent continuous portions. The And the discontinuous portion is formed in a range of 1 to 5 m, and the discontinuous portion is formed to be inclined with respect to the longitudinal direction of the continuous portion. The material layer has a thickness of 0.01 to 0.05 mm, and the conductive metal layer has a thickness of 0.025 to 0.075 mm.

  In the present invention, the discontinuous portion is formed with a width of 0.5 to 5 m.

  In the present invention, a ratio (L / D) of the length L of the continuous portion to the width D of the discontinuous portion is formed to be 200 to 50000.

  In the present invention, the width of the continuous portion is 20 to 25 mm.

  In the present invention, the conductive metal layer is an aluminum or aluminum alloy layer.

  In the present invention, the non-conductive synthetic resin material layer is a PET material.

  In the present invention, the discontinuous portion is formed to be inclined at an angle of 30 to 60 degrees with respect to the longitudinal direction of the continuous portion.

  In the present invention, the thickness of the conductive metal layer is formed larger than the thickness of the nonconductive synthetic resin material layer.

  In order to achieve the above object, a discontinuous shield tape according to an aspect of the present invention is a discontinuous shield tape for a communication cable, and the discontinuous shield tape is formed by twisting a pair of insulated wires. A discontinuous shield tape surrounding a core portion including a plurality of twisted wire portions, and the discontinuous shield tape includes a conductive metal layer and a non-conductive synthetic resin material layer, and the conductive metal layer Is formed on the non-conductive synthetic resin material layer, and the discontinuous shield tape is adjacent to a continuous portion in which the conductive metal layer is continuously formed in the non-conductive synthetic resin material layer. And the discontinuous portion where the conductive metal layer is cut off between the continuous portions, and the continuous portion is formed in a range of 1 to 5 m.

  In the present invention, the discontinuous portion is formed with a width of 0.5 to 5 m.

  In the present invention, a ratio (L / D) of the length L of the continuous portion to the width D of the discontinuous portion is formed to be 200 to 50000.

  In the present invention, the width of the continuous portion is 20 to 25 mm.

  In the present invention, the conductive metal layer is an aluminum or aluminum alloy layer.

  In the present invention, the non-conductive synthetic resin material layer is a PET material.

  In the present invention, the discontinuous portion is formed to be inclined with respect to the longitudinal direction of the continuous portion.

  In the present invention, the non-conductive synthetic resin material layer is formed to have a thickness of 0.01 to 0.05 mm.

  In the present invention, the conductive metal layer has a thickness in the range of 0.025 to 0.075 mm.

  In the present invention, the discontinuous portion is formed to be inclined at an angle of 30 to 60 degrees with respect to the longitudinal direction of the continuous portion.

  In the present invention, the conductive metal layer is formed to be thicker than the nonconductive synthetic resin material layer.

According to the present invention, it is possible to prevent external interference between adjacent cables and reduce reflection loss. Further, the discontinuous shield tape can be configured not to be easily broken by a tensile force applied from the outside.
In addition, the communication cable can be easily manufactured due to high formability.

  The following accompanying drawings are provided for understanding the technical idea of the present invention together with the detailed description of the invention, and the present invention should not be construed as being limited to the matters illustrated below.

It is a perspective view which shows the communication cable containing the discontinuous shield tape by this invention. It is a perspective view which shows the molded object in the process of forming the discontinuous shield tape contained in the said communication cable. It is a front view which shows the said discontinuous shield tape. It is sectional drawing which shows the said discontinuous shield tape. It is a graph which shows the experimental result of the magnitude | size of the external interference of the 1st pair (1Pair) of four pairs in the conventional UTP cable which does not apply a discontinuous shield tape. It is a graph which shows the experimental result of the magnitude | size of the external interference of the 2nd pair (2Pair) of four pairs in the conventional UTP cable which does not apply a discontinuous shield tape. It is a graph which shows the experimental result of the magnitude | size of the external interference of the 3rd pair (3Pair) of four pairs in the conventional UTP cable which does not apply a discontinuous shield tape. It is a graph which shows the experimental result of the magnitude | size of the external interference of the 4th pair (4Pair) of 4 pairs in the conventional UTP cable which does not apply a discontinuous shield tape. It is a graph which shows the experimental result of the magnitude | size of reflection loss in case L is 2.5 m.

  Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

  Prior to this, the terms used in the specification and claims should not be construed to be limited to the lexical meaning, and the inventor shall explain his invention in the best way. Based on the principle that the concept of terms can be defined as appropriate, it must be interpreted as a meaning and concept consistent with the technical idea of the present invention.

  Accordingly, the embodiments and configurations shown in the specification are merely preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. It should be understood that there may be various equivalents and variations that can be substituted.

  FIG. 1 is a perspective view showing a communication cable including a discontinuous shield tape according to the present invention, and FIG. 2 is a perspective view showing a molded product in the process of forming the discontinuous shield tape included in the communication cable. FIG. 3 is a front view showing the discontinuous shield tape, FIG. 4 is a cross-sectional view showing the discontinuous shield tape, and FIGS. 5 to 8 are conventional cases where the discontinuous shield tape is not applied. FIG. 9 is a graph showing the experimental results of the magnitude of reflection loss when L is 2.5 m.

  In the graphs of FIGS. 5 to 8, “1Pair” to “4Pair” are “first pair of four pairs (Pair)” to “fourth pair of four pairs (Pair)”, respectively. Is designated. “SPEC” is “spec” [ANSI (American National Standards Institute) / TIA-568B. 2 or IEC (International Electrotechnical Commission) 61156-5 standard for alien crosstalk data required for category 6A UTP cable (the alien crosstalk specification is category 6A or category 6A Required for the above UTP cable))].

  The communication cable according to the present invention separates the core portion 10 including a plurality of twisted wire portions formed by twisting together a pair of insulated wires and the plurality of twisted wire portions included in the core portion 10 from each other. A discontinuous shield tape 30 surrounding the core portion 10 and a sheath portion 40 surrounding the outer periphery of the discontinuous shield tape 30. Has a conductive metal layer 36 and a non-conductive synthetic resin material layer 32, and the conductive metal layer 36 is laminated on the non-conductive synthetic resin material layer 32, and the discontinuous shield tape is provided. 30 is a continuous portion 36 in which the conductive metal layer 36 is continuously formed from the nonconductive synthetic resin material layer 32, and the conductive metal layer between the adjacent continuous portion 36 and the continuous portion 36. And a discontinuity 33 which is severed, the continuous section 36 is characterized by being formed in a range in 1 to 5 m.

  The conductive wire is formed by using a conductor such as copper and then covering with an insulator for transmission of data converted into an electrical signal.

  The insulator is configured by adding an additive for imparting stable processing characteristics to LSZH (Low Smoke Zero Halogen), which is a polymer having flame retardancy.

  The twisted wire portion is formed by twisting a plurality of the conductive wires at a paired twist pitch with a constant interval, and is usually formed by twisting two wires as shown in FIG. The present invention is not limited and various modifications can be made.

  The twisted wire portion is configured to cover the outer periphery of the twisted conductor wire (twisted wire portion) so as to further improve transmission characteristics by reducing signal interference by increasing the shielding effect. obtain.

  A plurality of the twisted wire portions are included in the cable for high-speed communication, and normally, as shown in FIG. 1, the core portion 10 is formed by including four twisted wire portions in the sheath portion 40, but is not limited thereto. Various modifications are possible.

  On the other hand, in order to suppress interference between the stranded wire portions included in the cable, the opposing pitches where the stranded wire portions are twisted together are formed different from each other.

  As described above, a plurality of pairs of twisted wire portions are twisted together at a predetermined pitch in the longitudinal direction of the cable.

  Further, the communication cable according to the present invention includes a separator 20 for separating a plurality of twisted wire portions in the core portion 10 from each other.

  The separator 20 has a cross-shaped cross section, and includes partition walls that cross each other while blocking between the twisted wire portions in order to prevent internal interference between the twisted wire portions. A pair of the twisted wire portions are accommodated in the space.

  In addition, the cable includes a sheath portion 40 that surrounds the core portion 10 as described above and forms an outer peripheral wall or an outer cylinder.

  Here, the sheath 40 not only mechanically protects the configuration in the cable but also serves to block external interference (Alien Crosstalk) due to electromagnetic waves generated from other adjacent cables and other electronic equipment. provide.

  In general, the sheath part 40 is formed of an insulating material such as polyethylene, PVC, or an olefin polymer material.

  A discontinuous shield tape 30 surrounding the core portion 10 is disposed between the core portion 10 and the sheath portion 40.

  The discontinuous shield tape 30 is formed by laminating a conductive metal layer 36 such as aluminum or aluminum alloy on a non-conductive synthetic resin material layer 32 made of a material such as PET (Polyethylene Terephthalate).

  Here, in the discontinuous shield tape 30, the conductive metal layer 36 laminated on the non-conductive synthetic resin material layer 32 is discontinuously formed. Therefore, the conductive metal layer 36 has a certain length. And a discontinuous portion 33 that is a region where the conductive metal layer is cut off between adjacent continuous portions 36 and continuous portions 36.

  The discontinuous portion 33 is not provided with the conductive metal layer 36 and the nonconductive synthetic resin material layer 32 is present. The conductive metal layer 36 is discontinuously stacked on the conductive synthetic resin material layer 32.

  Referring to FIG. 2, a method for forming the discontinuous shield tape 30 will be described. The conductive metal layer 36 is overlaid on the nonconductive synthetic resin material layer 32 and is inclined to the conductive metal layer 36. 3 is formed, and the nonconductive synthetic resin material layer 32 and the conductive metal layer 36 are cut in the vertical direction to form the discontinuous shield tape 30 shown in FIG.

  Here, the continuous portion 36 is formed in a range of 1 to 5 m.

  The length L of the continuous portion 36 is a cycle in which the discontinuous portion 33 is generated, and the discontinuous portion 33 has a structure without shielding outside the cable core portion 10, so that an impedance change occurs. .

  The frequency at which the impedance change occurs can be calculated by v = f (frequency) × λ (wavelength), which is a simple mathematical formula of radio wave velocity.

  In general, since the radio wave speed of the cable is considered to be 2/3 × C (C is the speed of light), the following value is derived as λ as the period in which the discontinuity occurs.

  If the length L of the continuous portion 36 is less than 1 m, the number of occurrences of the discontinuous portion 33 increases, and the impedance change intensity is accumulated and increased.

  When the impedance change increases, a reflected wave is generated from the frequency, and the return loss due to this increases rapidly.

  For reference, the reflection loss is a value calculated by impedance, and the mathematical formula is as follows.

  RL = 20 Log [(Z-100) / (Z + 100)], Z is an impedance, and the reflection loss value increases as the Z value is changed from 100 ohm.

  Further, when the length L is shortened, there is a problem that the work for forming the discontinuous portion 33 increases, and the production cost of the entire discontinuous shield tape 30 increases.

  An additional element for determining the L value of the continuous portion 36 is a cable specification required from an international standard (TIA or IEC Standard).

Reflection loss requirements based on international standard specifications Spec. Is as follows.
1-10 MHz: -20 + 5 Log (f) dB
10-20MHz: 25dB
20 MHz or higher: 25-7 x Log (f / 20) dB

  When the above requirements are applied to the frequency corresponding to the impedance change generation cycle, the following is obtained.

  Since the required specifications are low at frequencies of 200 MHz or higher, it is relatively easy to satisfy the standards.

  However, when the frequency is increased to 200 MHz or more, the standard requirement becomes low, but the impedance change strength increases and the reflection loss peak increases. Therefore, unless the L value is selected at a level that can satisfy the international requirement. Don't be.

  As a result of the experiment, it was confirmed that the characteristics could be satisfied at an L value of 1 m or more.

  When the length L of the continuous portion 36 exceeds 5 m, the reflection loss margin increases again. However, if the length of the continuous portion 36 is too long, along the continuous portion 36. Since the shield connector for grounding the transmitted electromagnetic wave and the entire system must be installed and used in a groundable form, the cost increases significantly and the installation process becomes complicated.

  Meanwhile, the width D of the discontinuous portion 33 is formed in a range between 0.5 and 5 mm.

  Here, when the width D of the discontinuous portion 33 is 0.5 mm or less, it becomes extremely difficult to manufacture the entire discontinuous shield tape 30, and the width D of the discontinuous portion 33 exceeds 5 mm. In this case, the effect of shielding external interference between adjacent cables cannot be sufficiently exhibited.

  From such a viewpoint, the ratio (L / D) of the length L of the continuous portion 36 to the width D of the discontinuous portion 33 is 200 to 50,000.

  On the other hand, when the discontinuous shield tape 30 surrounds the core portion 10, the continuous portion 36 has a width W of 20 to 25 mm. Since 10 is surrounded, it is configured so that external interference between adjacent cables can be more reliably shielded.

  The non-conductive synthetic resin material layer 32 has a thickness t1 of 0.01 to 0.05 mm, and the conductive metal layer 36 has a thickness t2 of 0.025 to 0.075 mm. The

  Here, the non-conductive synthetic resin material layer 32 is formed as a single layer in FIG. 4, but is not limited thereto, and may be configured as two or more synthetic resin material layers. In this case, the thickness of the entire nonconductive synthetic resin material layer is formed in the above range.

  When the discontinuous shield tape 30 is formed, the thickness t2 of the conductive metal layer 36 is larger than the thickness t1 of the nonconductive synthetic resin material layer 32.

  When surrounding the outer periphery of the core portion 10 with the discontinuous shield tape 30, the conductive metal layer 36 formed of aluminum or an aluminum alloy maintains a surrounding form, whereas a material such as PET or the like The non-conductive synthetic resin material layer 32 formed of another synthetic resin material has a biasing force to return to the original planar shape.

  Therefore, when the core portion 10 is surrounded by the discontinuous shield tape 30 by forming the thickness t2 of the conductive metal layer 36 larger than the thickness t1 of the nonconductive synthetic resin material layer 32, Even if an additional force is not applied or the process is not performed, the circular surrounding shape can be maintained as it is.

  On the other hand, as shown in FIGS. 2 and 3, the discontinuous portion 33 is formed to be inclined with respect to the longitudinal direction of the continuous portion 36, and at this time, the discontinuous portion 33 corresponds to the continuous portion 36. It may be formed inclined at an angle (θ) of 30 to 60 degrees with respect to the longitudinal L direction.

  When a tensile force is applied to the discontinuous shield tape 30, a force is applied to the discontinuous portion 33 in the state shown by the arrow in FIG. When formed in a direction perpendicular to the longitudinal direction of the discontinuous shield tape 30, the product of the width W of the discontinuous shield tape 30 and the thickness t 1 of the nonconductive synthetic resin material layer 32. The cross section of the non-conductive synthetic resin material layer having the corresponding area (W × t1) becomes resistant to the tensile force.

  However, when the discontinuous portion 33 is formed to be inclined as described above, a conductive metal layer is included in the vertical cross section that resists the tensile force, and thus the area of the cross section that resists the tensile force. Will be able to withstand greater tensile forces.

  From this point of view, the inclined angle θ is formed in a range of 30 to 60 degrees, more preferably an angle of about 45 degrees.

  5 to 8 are graphs showing experimental results of the magnitude of external interference in a conventional UTP cable to which discontinuous shield tape is not applied, and FIG. 9 is a reflection loss when L is 2.5 m. It is a graph which shows the experimental result of the magnitude | size.

  5 to 9, the vertical axis represents dB units, and the horizontal axis represents frequencies in MHz units.

  As can be seen from the above table, as a result of measuring the characteristics of external interference between adjacent cables when the outer peripheral portion of the core portion 10 is surrounded by the discontinuous shield tape 30 according to the present invention and when it is not, In the case where there is not, the magnitude of the external interference of the first twisted wire portion shows a characteristic of −3.11 dB at 34.85 MHz, and when the discontinuous shield tape 30 is applied, the minimum margin is 7.7 dB. It showed a stable level.

  In addition, the characteristic difference between the four stranded portions when not surrounded is 10 dB, and when the discontinuous shield tape 30 is applied, the difference is 1.4 dB, and each stranded portion is uniform. The characteristics are shown.

  As described above, the present invention has been described with reference to the limited embodiments and drawings. However, the technical idea of the present invention is not limited to these, and the person having ordinary knowledge in the technical field to which the present invention belongs. If so, various modifications and variations can be made within the technical idea of the present invention and the equivalent scope of the claims to be described later.

10 Core part 20 Separator 30 Discontinuous shield tape 32 Non-conductive synthetic resin material layer 33 Discontinuous part 36 Conductive metal layer (continuous part)
40 Sheath portion D Width of discontinuous portion L Length of continuous portion W Width of continuous portion θ Angle of discontinuous portion with respect to longitudinal direction of continuous portion t1 Thickness of non-conductive synthetic resin material layer t2 Thickness of conductive metal layer The

Claims (12)

Discontinuous shield tape for communication cables,
The discontinuous shield tape is a discontinuous shield tape surrounding a core portion including a plurality of twisted wire portions formed by twisting a pair of insulated wires;
The discontinuous shield tape includes a conductive metal layer and a nonconductive synthetic resin material layer,
The conductive metal layer is laminated on the non-conductive synthetic resin material layer;
The discontinuous shield tape includes a continuous portion where the conductive metal layer is continuously formed in the non-conductive synthetic resin material layer, and the conductive metal layer is disconnected between adjacent continuous portions. Including discontinuities,
The discontinuous shield tape for a communication cable, wherein the continuous portion is formed in a range of 1 to 5 m.   2. The discontinuous shield tape for a communication cable according to claim 1, wherein the discontinuous portion has a width of 0.5 to 5 m.   The discontinuous shield tape for communication cables according to claim 1 or 2, wherein a ratio (L / D) of the length L of the continuous portion to the width D of the discontinuous portion is 200 to 50,000.   The discontinuous shield tape for a communication cable according to any one of claims 1 to 3, wherein a width of the continuous portion is 20 to 25 mm.   The discontinuous shield tape for a communication cable according to any one of claims 1 to 4, wherein the conductive metal layer is made of aluminum or an aluminum alloy layer.   The discontinuous shield tape for communication cables according to any one of claims 1 to 5, wherein the non-conductive synthetic resin material layer is made of PET.   The discontinuous shield tape for a communication cable according to any one of claims 1 to 6, wherein the discontinuous portion is formed to be inclined with respect to a longitudinal direction of the continuous portion.   The discontinuous shield tape for a communication cable according to any one of claims 1 to 7, wherein the non-conductive synthetic resin material layer has a thickness of 0.01 to 0.05 mm.   9. The discontinuous shield tape for a communication cable according to claim 1, wherein a thickness of the conductive metal layer is in a range of 0.025 to 0.075 mm.   10. The communication cable according to claim 1, wherein the discontinuous portion is formed to be inclined at an angle of 30 to 60 degrees with respect to a longitudinal direction of the continuous portion. Continuous shield tape.   The discontinuous shield for a communication cable according to any one of claims 1 to 10, wherein a thickness of the conductive metal layer is formed larger than a thickness of the nonconductive synthetic resin material layer. tape. A core portion including a plurality of twisted wire portions formed by twisting a pair of insulated wires.
A separator for separating a plurality of stranded wire parts included in the core part;
A discontinuous shield tape surrounding the core;
In a communication cable including a sheath portion surrounding the outside of the discontinuous shield tape,
A communication cable including a discontinuous shield tape, wherein the discontinuous shield tape is the discontinuous shield tape according to any one of claims 1 to 11.

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