KR20150021181A - Communication cable comprising discontinuous shield tape and discontinuous shield tape - Google Patents

Abstract

A communication cable according to the present invention includes core parts which include a wire part formed by twisting a pair of insulate-coated wires, a separator for separating wire parts included in the core part, from each other, a discontinuous shield tape which surrounds the core part, a sheathed part which surrounds the outside of the discontinuous shield tape. The discontinuous shield tape includes a conducive metal layer and a non-conductive synthetic resin layer. The conducive metal layer is stacked on the not-conductive synthetic resin layer. The discontinuous shield tape includes a continuous part which has the conductive metal layer which is continuously formed on the non-conductive synthetic resin layer and a non-continuous part which has the conducive metal layer which is discontinuous between an adjacent continuous part and the continuous part. The continuous part is formed in a range of 1m to 5m. According to the present invention, external interference between adjacent cables can be prevented and reflection loss can be reduced. Also, the breakage of the discontinuous shield tape due to a tensile force applied from the outside can be prevented and a communication cable having high molding property can be easily manufactured.

Description

TECHNICAL FIELD [0001] The present invention relates to a communication cable including a noncontinuous shielding tape and a noncontinuous shielding tape.

The present invention relates to a communication cable and a noncontinuous shielding tape comprising a noncontinuous shielding tape, and more particularly to a communication cable and a noncontinuous shielding tape which are configured to reduce reflection loss while preventing alien interference between adjacent cables, .

Generally, a UTP cable (or a LAN cable) used as a communication cable is formed by spirally twisting conductors formed by covering a conductor such as copper with an insulator to form a twisted wire portion. In a state where four individual twisted wire portions are gathered to form a core portion It is also called an unshielded pair cable.

Recently, UTP cable has been developed as an important issue to increase the information transmission capacity according to the development of information communication technologies such as ATM and Ethernet.

On the other hand, according to the world-wide protocol, the UTP cable is divided into a category (Category or Cat.) According to the signal transmission capability and a number, and the higher the number, the higher the transmission characteristic.

For example, a Cat.5 rated communication cable has a transmission rate of 100 Mbps with a signal transmission bandwidth of 100 MHz, a Cat.6 rated communication cable has a transmission bandwidth of 250 MHz and a transmission speed of 1 Gbps. A 6A class communication cable has a transmission bandwidth of 500 MHz and a transmission rate of 10 Gbps.

 In addition to the crosstalk between the twisted pairs included in the cable, the crosstalk between the adjacent communication cables is an important factor for determining the data transmission characteristics of the communication cable.

That is, if the crosstalk between adjacent cables can not be reduced appropriately, the electrical characteristics required by the standard can not be satisfied and the stable communication quality required in the class can not be ensured.

As a method for solving this problem, U.S. Patent Registration No. 7238886 proposes a method of forming a channel space in a sheath portion in order to separate a distance between twisted pairs disposed in adjacent cables. However, according to this method, The outer diameter is increased, thereby limiting the number of cables that can be installed in the same space.

As another method for reducing crosstalk between adjacent cables, Japanese Unexamined Patent Application Publication No. 2006-032193 discloses a method of wrapping the outside of the twisted pair with a metal shielding tape. However, according to this method, There is a demand for a grounding connector to plate electromagnetic waves transmitted through the shielding tape with respect to a cable.

Accordingly, there is a desperate need to develop a communication cable configured to reduce reflection loss when transmitting data through a cable while reducing crosstalk between adjacent cables.

It is an object of the present invention to provide a communication cable and a discontinuous shielding tape comprising a discontinuous shielding tape configured to reduce return loss while preventing alien interference between adjacent cables.

It is still another object of the present invention to provide a communication cable and an noncontinuous shielding tape comprising a noncontinuous shielding tape configured to exert a greater resistance against externally applied tensile force.

It is still another object of the present invention to provide a communication cable and an noncontinuous shielding tape comprising an noncontinuous shielding tape which is constructed so as to be easy to manufacture but also to have high moldability.

According to an aspect of the present invention, there is provided a communication cable including: a core portion including a plurality of twisted-wire portions formed by twisting a pair of insulated wires, and a plurality of twisted- A communication cable comprising: a separator; an uncontinuous shielding tape surrounding the core; and a sheath surrounding the outside of the noncontinuous shielding tape, wherein the noncontinuous shielding tape comprises a conductive metal layer and a nonconductive synthetic resin layer, Wherein the nonconductive shielding tape is formed by laminating a nonconductive shielding tape on a portion of the nonconductive synthetic resin material which is continuous with the continuous portion in which the conductive metal layer is continuously formed, And the continuous portion is formed in a range of 1 m to 5 m And that is characterized.

Preferably, the discontinuity is formed with a width of 0.5 mm to 5 mm.

Here, the ratio (L / D) of the length (L) of the continuous portion to the width (D) of the discontinuous portion may be 200 to 50000.

The width of the continuous portion may be 20 to 25 mm.

Preferably, the conductive metal layer is an aluminum or aluminum alloy layer.

Preferably, the non-conductive synthetic resin layer is a PET material.

According to another aspect of the present invention, there is provided a communication cable including: a core portion including a plurality of twisted-wire portions formed by twisting a pair of insulated wires, and a plurality of twisted- Wherein the non-continuous shielding tape comprises a conductive metal layer and a non-conductive synthetic resin layer, the non-conductive shielding tape including a conductive metal layer and a non-conductive synthetic resin layer, Wherein a metal layer is laminated on the nonconductive synthetic resin layer, and the noncontinuous shielding tape is formed in such a manner that the conductive metal layer is disconnected between the continuous portion adjacent to the continuous portion in which the conductive metal layer is continuously formed in the nonconductive synthetic resin layer, Wherein the continuous portion is formed in a range of 1 m to 5 m , The discontinuous portion is formed to be inclined with respect to the longitudinal direction of the continuous portion, the thickness of the nonconductive synthetic resin layer is 0.01 mm to 0.05 mm, and the thickness of the conductive metal layer is 0.025 mm to 0.075 mm do.

Preferably, the discontinuity is formed with a width of 0.5 mm to 5 mm.

Here, the ratio (L / D) of the length (L) of the continuous portion to the width (D) of the discontinuous portion may be 200 to 50000.

The width of the continuous portion may be 20 to 25 mm.

Preferably, the conductive metal layer is an aluminum or aluminum alloy layer.

Preferably, the non-conductive synthetic resin layer is a PET material.

Meanwhile, the discontinuous portion may be inclined at an angle of 30 to 60 degrees with respect to the longitudinal direction of the continuous portion.

Further, the thickness of the conductive metal layer may be larger than the thickness of the nonconductive synthetic resin layer.

The noncontinuous shielding tape for a communication cable according to the present invention is a noncontinuous shielding tape which surrounds a core portion including a plurality of twisted wire portions formed by twisting a pair of insulated wires, And a non-conductive synthetic resin material layer, wherein the conductive metal layer is laminated on the nonconductive synthetic resin material layer, and the noncontinuous shielding tape comprises a continuous portion in which the conductive metal layer is continuously formed in the nonconductive synthetic resin material layer, And a discontinuous portion where the conductive metal layer is disconnected between the continuous portion and the continuous portion, wherein the continuous portion is formed in a range of 1 m to 5 m.

Preferably, the discontinuity is formed with a width of 0.5 mm to 5 mm.

Here, the ratio (L / D) of the length (L) of the continuous portion to the width (D) of the discontinuous portion may be 200 to 50000.

The width of the continuous portion may be 20 to 25 mm.

Preferably, the conductive metal layer is an aluminum or aluminum alloy layer.

Preferably, the non-conductive synthetic resin layer is a PET material.

Here, the discontinuous portion may be formed to be inclined with respect to the longitudinal direction of the continuous portion.

Preferably, the thickness of the nonconductive synthetic resin layer is 0.01 mm to 0.05 mm.

The thickness of the conductive metal layer may be in the range of 0.025 mm to 0.075 mm.

Here, the discontinuous portion may be inclined at an angle of 30 to 60 degrees with respect to the longitudinal direction of the continuous portion.

Preferably, the thickness of the conductive metal layer is larger than the thickness of the nonconductive synthetic resin layer.

According to the present invention, it is possible to reduce the reflection loss while preventing alien interference between adjacent cables.

Further, the non-continuous shielding tape can be configured not to be easily broken by the tensile force externally applied.

Further, the communication cable can be easily manufactured by high moldability.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
1 is a perspective view of a communication cable including a non-continuous shielding tape according to the present invention,
2 is a perspective view showing a molded product in the process of forming the noncontinuous shielding tape included in the communication cable,
3 is a front view of the discontinuous shielding tape,
4 is a cross-sectional view of the non-continuous shielding tape,
FIG. 5 is a graph showing an experimental result of an external interference magnitude of a conventional UTP cable to which the non-continuous shielding tape is not applied,
FIG. 6 is a graph showing the experimental result of the magnitude of the return loss when 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 in a dictionary sense, and the inventor may, on the principle that the concept of a term can be properly defined in order to explain its invention in the best way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.

Therefore, the embodiments shown in the present specification and the drawings are only exemplary embodiments of the present invention, and not all of the technical ideas of the present invention are presented. Therefore, various equivalents It should be understood that water and variations may exist.

FIG. 1 is a perspective view of a communication cable including the noncontinuous shielding tape according to the present invention, FIG. 2 is a perspective view showing a molded product in the process of forming the noncontinuous shielding tape included in the communication cable, FIG. 5 is a graph showing a result of an external interference magnitude test of a conventional UTP cable to which the non-continuous shielding tape is not applied. FIG. The magnitude of the return loss is the graph of the experimental result.

The communication cable according to the present invention includes a core portion 10 including a plurality of twisted-wire portions formed by twisting a pair of insulated wires, and a plurality of twisted- A communication cable comprising a separator (20), a noncontinuous shielding tape (30) surrounding the core (10), and a sheath (40) surrounding the outside of the noncontinuous shielding tape (30) The shielding tape 30 includes a conductive metal layer 36 and a nonconductive synthetic resin layer 32. The conductive metal layer 36 is laminated on the nonconductive synthetic resin layer 32 and the noncontact shielding tape 30 Is formed between the continuous portion 36 in which the conductive metal layer 36 is continuously formed in the nonconductive synthetic resin layer 32 and the continuous portion 36 adjacent to the continuous portion 36 in the nonconductive synthetic resin layer 32, (33), the continuous portion (36) 1 is characterized in that formed in the range of m to 5 m.

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

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

The twisted wire portion is formed by twisting a plurality of wires at a pitch of a predetermined interval, and typically, two wires are twisted as shown in FIG. 1, but the present invention is not limited thereto and various modifications are possible.

In addition, the twisted pair may have a structure in which an outer portion of the twisted wire (twisted wire) is coated so as to improve transmission characteristics by reducing signal interference through an increase of a shielding effect.

As shown in FIG. 1, the twisted-wire portion includes a plurality of twisted-wire portions in the sheath portion 40 to form the core portion 10, but the present invention is not limited thereto. Various modifications are possible.

On the other hand, in order to suppress interference between the twisted pairs included in the cable, the twist pitches in which the twisted pairs are twisted are formed to be different from each other.

As described above, the plurality of twisted pairs are twisted with 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 pairs in the core portion 10 from each other.

The separator (20) is cross-shaped in cross-section and includes partition walls crossing each other so as to interpose between the twisted pairs to prevent internal interference between the twisted pairs, and the twisted pairs One by one.

In addition, the cable includes a sheath portion 40 that surrounds the core portion 10 and is configured to form an outer appearance.

Here, the sheath 40 not only mechanically protects the structures in the cable, but also provides a function of blocking alien crosstalk caused by electromagnetic waves generated from adjacent cables or other electronic equipment.

Generally, the sheath 40 is formed of an insulating material such as polyethylene, PVC, or olefin-based polymer material.

A noncontinuous shielding tape (30) surrounding the core (10) is disposed between the core (10) and the sheath (40).

The non-continuous shielding tape 30 is formed by laminating a conductive metal layer 36 such as aluminum or an aluminum alloy on a non-conductive synthetic resin layer 32 made of polyethylene terephthalate (PET) or the like.

The discontinuous shielding tape 30 is formed by discontinuously forming the conductive metal layer 36 that is laminated on the nonconductive synthetic resin layer 32 so that the conductive metal layer 36 is continuous And a discontinuous portion 33 which is a region where the conductive metal layer is disconnected between the continuous portion 36 and the continuous portion 36 adjacent to the continuous portion 36 to be formed.

The nonconductive shielding tape 30 may be formed of a nonconductive synthetic resin material layer having the same shape as a long band as the entirety of the nonconductive shielding tape 30 because the conductive metal layer 36 is not disposed in the discontinuity portion 33, 32 are formed in a stacked manner on the conductive metal layer 36 in a discontinuous manner.

2, a method of forming the discontinuous shielding tape 30 includes a step of forming a discontinuous portion (not shown) which is inclined with respect to the conductive metal layer 36 in a state where the conductive metal layer 36 is superimposed on the nonconductive synthetic resin layer 32 The nonconductive shielding tape 30 as shown in FIG. 3 is formed by cutting the nonconductive synthetic resin layer 32 and the conductive metal layer 36 in the vertical direction.

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

The length L of the continuous portion 36 is a period in which the discontinuous portion 33 is generated and the discontinuous portion 33 has no shielding outside the cable core portion 10 so that the impedance is changed.

The frequency at which the impedance change occurs can be calculated by a simple propagation velocity equation v = f (frequency) X? (Wavelength).

In general, the propagation speed of a cable is considered as 2/3 X C (C is the speed of light), so λ is a period in which discontinuity occurs, and the following values are derived.

Continuous length 0.5 0.8 One 2 2.5 4 5 10 cable
Number of discontinuities per 100 m 200 125 100 50 40 25 20 10 Impedance change period according to length of discontinuity part (long wave of cold wave) 400 MHz 250 MHz 200 MHz 100 MHz 80 MHz 50 MHz 40 MHz 20 MHz Half-wave case 200 MHz 125 MHz 100 MHz 50 MHz 40 MHz 25 MHz 20 MHz 10 MHz

 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 intensity of the impedance change increases cumulatively.

When the impedance change increases, a reflected wave is generated at the frequency, so that the return loss due to the reflected wave is rapidly increased.

For reference, the return loss is the value calculated from the impedance, and the formula is as follows.

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

In addition, when the length L is shortened, the work for forming the discontinuous portion 33 is increased and the production cost of the entire non-continuous shielding tape 30 is increased.

An additional factor for determining the L value of the continuity 36 is the cable specification required by the International Standard (TIA or IEC Standard).

Specification of return loss based on international standard specification Spec. Is as follows.

1 to 10 MHz: -20 + 5 Log (f) dB

10 to 20 MHz: 25 dB

20 MHz or higher: 25 - 7 X Log (f / 20) dB

Applying the above requirement to the frequency corresponding to the impedance change occurrence period, it is as follows.

Impedance peak generation period according to segment length (one wave length basis) 400 MHz 250 MHz 200 MHz 100 MHz 80 MHz 50 MHz 40 MHz 20 MHz RL specification value by frequency 15.9 dB 17.3 dB 18.0 dB 20.1 dB 20.8 dB 22.2 dB 22.9 dB 25.0 dB Half-wave case 200 MHz 125 MHz 100 MHz 50 MHz 40 MHz 25 MHz 20 MHz 10 MHz RL specification value by frequency 18.0 dB 19.4 dB 20.1 dB 22.2 dB 22.9 dB 24.3 dB 25.0 dB 25.0 dB RL margin (as a standard) - 2.5 dB - 0.9 dB 1.2 dB 3.0 dB 1.3 dB 0.9 dB 0.4 dB 0.8 dB

Since the required specification is lowered at a frequency of 20 MHz or higher, the specification can be satisfied relatively easily.

However, if the increase is more than 200 MHz, the specification requirement will be lowered. However, since the intensity of the impedance change increases and the peak of the reflection loss increases, L value should be selected at a level that can satisfy international requirements.

As a result of the above experiment, it was confirmed that the characteristics were satisfactory at an L value of 1 m or more.

If the length L of the continuous portion 36 exceeds 5 m, the margin of the return loss increases again. However, since the length of the continuous portion 35 is too long, The shielding connector for grounding the electromagnetic wave and the whole system must be installed and used in a form that can be grounded, so that the cost is significantly increased and the installation process becomes troublesome.

On the other hand, the width D of the discontinuous portion 33 is formed in a range of 0.5 mm to 5 mm.

If the width D of the discontinuity portion 33 is 0.5 mm or less, it becomes very difficult to manufacture the entire discontinuous shielding tape 30. If the width D of the discontinuity portion 33 exceeds 5 mm The effect of shielding the alien crosstalk between adjacent cables can not be sufficiently exhibited.

The ratio L / D of the length L of the continuous portion 36 with respect to the width D of the discontinuous portion 33 is 200 to 50,000.

The width W of the continuous portion 36 is 20 to 25 mm so that when the non-continuous shielding cable 30 surrounds the core portion 10, Are overlapped to cover the core portion (10), so that alien crosstalk between adjacent cables can be more surely shielded.

The thickness t1 of the nonconductive synthetic resin layer 32 is 0.01 mm to 0.05 mm and the thickness t2 of the conductive metal layer 36 is 0.025 mm to 0.075 mm.

Although the nonconductive synthetic resin material layer 32 is shown as having one layer in FIG. 4, the present invention is not limited thereto. The nonconductive synthetic resin material layer 32 may be composed of two or more synthetic resin layers. In this case, Is formed in the above range.

When the noncontinuous shielding tape 30 is formed, the thickness t2 of the conductive metal layer 36 is formed to be larger than the thickness t1 of the nonconductive synthetic resin layer 32.

When the non-continuous shielding tape 30 is wrapped around the core portion 10, the conductive metal layer 36 formed of aluminum or an aluminum alloy maintains a wrapped shape, while a tape or other synthetic resin material The nonconductive synthetic resin material layer 32, which is formed of the nonconductive synthetic resin material layer 32, exerts a spring force to return to the original flat shape.

Therefore, when the thickness t2 of the conductive metal layer 36 is made larger than the thickness t1 of the nonconductive synthetic resin layer 32, when the core portion 10 is covered with the non-continuous shielding tape 30, It is possible to maintain the form enclosed in a circle without applying a force or performing a process.

2 and 3, the discontinuity 33 is formed to be inclined with respect to the longitudinal direction of the continuous portion 36, wherein the discontinuity 33 is formed by the length of the continuous portion 36 May be formed to be inclined at an angle (?) Of 30 to 60 degrees with respect to the direction (L).

When a tensile force is applied to the discontinuous shielding tape 30, a force is applied to the discontinuity 33 in the state of the arrow shown in FIG. 3, The thickness of the nonconductive synthetic resin material layer 32 is equal to the sum of the width W of the noncontinuous shielding tape 30 and the thickness t1 of the nonconductive synthetic resin material layer 32, (WX t1) of the non-conductive synthetic resin layer is resistant to the tensile force.

However, when the discontinuous portion 33 is inclined as described above, since the conductive metal layer is included in the vertical cross section resistant to the tensile force, the area of the cross-sectional surface that resists the tensile force increases, .

In view of the above, the inclined angle &thetas; is formed in the range of 30 DEG to 60 DEG, more preferably about 45 DEG.

FIG. 5 is a graph showing the results of an external interference size test of a conventional UTP cable without the noncontinuous shielding tape, and FIG. 6 is a graph showing an experiment result of magnitude of return loss when L is 2.5 m.

In Figs. 5 and 6, the vertical axis indicates the frequency in dB and the horizontal axis indicates the frequency in MHz.

division
1 Pr 2 Pr 3 Pr 4 Pr Worst Margin MHz Worst Margin MHz Worst Margin MHz Worst Margin MHz Conventional UTP cable -3.11 34.85 0.12 56.94 6.21 49.08 2.73 82.79 Invention 9.10 219.47 7.70 219.47 8.60 219.47 9.00 219.47

As can be seen from the above table, the outer interference characteristics between the case where the core 10 was wrapped with the non-continuous shielding tape 30 according to the present invention and the case where the cable was not wrapped were measured. As a result, In the case of the first twisted pair, the magnitude of the outer interference was 34.85 MHz to -3.11 dB. When the noncontinuous shielding tape 30 was applied, the minimum margin was stable at 7.7 dB.

In addition, the difference in characteristic between the four twisted sections when not wrapped showed a difference of 10 dB. When the non-continuous shielding tape (30) was applied, the difference was 1.4 dB, and each twisted section showed uniform characteristics.

While the present invention has been described with reference to the exemplary embodiments and the drawings, it is to be understood that the technical scope of the present invention is not limited to these embodiments and that various changes and modifications will be apparent to those skilled in the art. Various modifications and variations may be made without departing from the scope of the appended claims.

10: core part
20: Separator
30: Non-continuous shielding tape
40: Shebu

Claims (25)

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 twisted pairs included in the core portion from each other;
A non-continuous shielding tape surrounding the core portion;
And a sheath portion surrounding the outside of the non-continuous shielding tape,
Wherein the non-continuous shielding tape comprises a conductive metal layer and a non-conductive synthetic resin layer,
The conductive metal layer is laminated on the nonconductive synthetic resin layer,
Wherein the noncontinuous shielding tape comprises a continuous portion in which the conductive metal layer is continuously formed in the nonconductive synthetic resin layer and a discontinuous portion in which the conductive metal layer is disconnected between the adjacent continuous portion and the continuous portion,
Wherein the continuous portion is formed in a range of 1 m to 5 m. The method according to claim 1,
Characterized in that the discontinuity is formed with a width of 0.5 mm to 5 mm. The method according to claim 1,
Characterized in that 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. The method according to claim 1,
Wherein the width of the continuous portion is 20 to 25 mm. The method according to claim 1,
Wherein the conductive metal layer is an aluminum or aluminum alloy layer. The method according to claim 1,
Wherein the non-conductive synthetic resin layer is made of polyethylene terephthalate (PET). 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 twisted pairs included in the core portion from each other;
A non-continuous shielding tape surrounding the core portion;
And a sheath portion surrounding the outside of the non-continuous shielding tape,
Wherein the non-continuous shielding tape comprises a conductive metal layer and a non-conductive synthetic resin layer,
The conductive metal layer is laminated on the nonconductive synthetic resin layer,
Wherein the noncontinuous shielding tape comprises a continuous portion in which the conductive metal layer is continuously formed in the nonconductive synthetic resin layer and a discontinuous portion in which the conductive metal layer is disconnected between the adjacent continuous portion and the continuous portion,
The continuous portion is formed in a range of 1 m to 5 m,
The discontinuous portion is formed to be inclined with respect to the longitudinal direction of the continuous portion,
The thickness of the nonconductive synthetic resin layer is 0.01 mm to 0.05 mm,
Wherein the thickness of the conductive metal layer is in the range of 0.025 mm to 0.075 mm. 8. The method of claim 7,
Characterized in that the discontinuity is formed with a width of 0.5 mm to 5 mm. 8. The method of claim 7,
Characterized in that 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. 8. The method of claim 7,
Wherein the width of the continuous portion is 20 to 25 mm. 8. The method of claim 7,
Wherein the conductive metal layer is an aluminum or aluminum alloy layer. 8. The method of claim 7,
Wherein the non-conductive synthetic resin layer is made of polyethylene terephthalate (PET). 8. The method of claim 7,
Wherein 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. 8. The method of claim 7,
Wherein the thickness of the conductive metal layer is larger than the thickness of the nonconductive synthetic resin layer. 1. A non-continuous shielding tape for a communication cable,
Wherein the noncontinuous shielding tape is a noncontinuous shielding tape that surrounds a core portion including a plurality of twisted wire portions formed by twisting a pair of insulated wires,
Wherein the non-continuous shielding tape comprises a conductive metal layer and a non-conductive synthetic resin layer,
The conductive metal layer is laminated on the nonconductive synthetic resin layer,
Wherein the noncontinuous shielding tape comprises a continuous portion in which the conductive metal layer is continuously formed in the nonconductive synthetic resin layer and a discontinuous portion in which the conductive metal layer is disconnected between the adjacent continuous portion and the continuous portion,
Wherein the continuous portion is formed in a range of 1 m to 5 m. 16. The method of claim 15,
Characterized in that the discontinuity is formed with a width of 0.5 mm to 5 mm. 16. The method of claim 15,
Wherein the ratio (L / D) of the length (L) of the continuous portion to the width (D) of the discontinuous portion is 200 to 50,000. 16. The method of claim 15,
And the width of the continuous portion is formed to be 20 mm to 25 mm. 16. The method of claim 15,
Wherein the conductive metal layer is an aluminum or aluminum alloy layer. 16. The method of claim 15,
Wherein the non-conductive synthetic resin layer is made of polyethylene terephthalate (PET). 16. The method of claim 15,
Wherein the discontinuous portion is formed to be inclined with respect to the longitudinal direction of the continuous portion. 16. The method of claim 15,
Wherein the non-conductive synthetic resin layer has a thickness of 0.01 mm to 0.05 mm. 16. The method of claim 15,
Wherein the thickness of the conductive metal layer is in the range of 0.025 mm to 0.075 mm. 16. The method of claim 15,
Wherein 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. 16. The method of claim 15,
Wherein the thickness of the conductive metal layer is larger than the thickness of the nonconductive synthetic resin layer.

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