WO2021137613A1 - Communication cable - Google Patents

Abstract

The present invention relates to a communication cable capable of: satisfying crosstalk characteristics between stranded portions inside the cable and, simultaneously, minimizing interference influence between external cables and allowing cable thinning; and improving flexibility. In addition, the communication cable has improved thinning and lightweight characteristics, and thus can resolve the applicability problem of a communication cable. In addition, the communication cable according to the present invention has improved flexibility, thinning, and lightweight characteristics, thereby ensuring a reduction in laying area, simplicity of laying work, and the like, and facilitating lightening when laid in aircrafts, ships, and vehicles.

Description

communication cable

The present invention relates to a communication cable. More specifically, the present invention relates to an Ethernet cable capable of improving crosstalk characteristics between twisted-pair parts inside a cable and minimizing interference between external cables during high-speed data transmission.

Recent expansion of digital social networks, the 4th industrial revolution, the development of Internet of Thing (IoT) technology, 5th Generation Mobile Telecommunication, Big Data and Artificial Intelligence (AI) ) and related issues, IP traffic is increasing rapidly, and this increase is expected to continue in the future.

In general, as shown in FIG. 1 , an Ethernet cable used as a communication cable that enables high-speed data transmission is a spiral wire in which a conductor 10 made of copper or the like is covered with an insulator 20 . Twisted to make a plurality (about 4) of the stranded wire portion 30, and has a structure in which the plurality of stranded wire portions are embedded in the sheath portion 50, which is the outer skin.

On the other hand, in the case of high-frequency (250 MHz or more) signal communication that enables high-speed transmission of the data, the characteristics of an Ethernet cable as a transmission medium are very important.

During communication of the high-frequency signal, crosstalk, a phenomenon affecting due to electromagnetic coupling between twisted pairs inside cables, may occur, and when multiple cables in a building are installed in a bundle form, the cables themselves There is a problem in that the overall communication quality may be deteriorated due to the Alien Crosstalk phenomenon due to the electromagnetic interference (EMI) phenomenon in the twisted-pair part.

Among these problems, in order to solve the crosstalk phenomenon between twisted pairs, a conventional Ethernet cable introduces a separator 40 made of high-density polyethylene to separate the distances between twisted pairs by a predetermined distance or more (see FIG. 1 ). However, when the separator is made of a high-density polyethylene material, the high-density polyethylene separator is a non-metal material and has no shielding function. Since the shielding function must be induced with a separation distance greater than the level, there is a limit to the design of the compact structure of the separator, which causes an additional problem in that the outer diameter of the entire cable is increased. In addition, it is possible to consider replacing the material of the separator with a metallic material or a coating material, but in the case of a metallic material, it is difficult to maintain the desired pitch or the overall structure in the assembly process of twisting the entire stranded wire in one direction, and the overall weight of the cable is excessive. There may be problems that increase the amount.

In addition, among the above problems, the UTP cable (Unshielded Twisted Pair) introduced to solve the problem that the overall communication quality is deteriorated due to the interference (Alien Crosstalk) phenomenon caused by the electromagnetic interference (EMI) phenomenon between the cables itself and the internal twisted pair part cable), it is generally applied to data centers, and in this case, several cables are applied as a bundle type, so in the case of thick cables, handling is very difficult in installation work, etc., so the thinning characteristic is very important. factor, and at the same time, the heavier the weight of the cables applied in the bundle form, the more burden is placed on the connector to which the cable is connected. .

On the other hand, conventionally, the individual twisted-pair part shielding method, that is, a technique of applying a shielding layer covering all pairs of the twisted-pair parts with an aluminum coating tape capable of shielding has been proposed (see Patent Document 1).

However, in the case of individual twisted pair shielding, an individual twisted pair metal tape shielding process is first added to significantly increase the material consumption required for cable production, and due to the thickness of the metal tape, the overall cable outer diameter increases and the weight The problem continued to arise in which the cable installation work in the complex structure became difficult due to the excessive increase in the number of cables and the decrease in flexibility.

Therefore, while applying a separator with conductive characteristics, it is possible to simultaneously reduce the weight and narrow the distance along with excellent crosstalk characteristics through the limitation of the separation distance between the twisted-pair parts, and communication that enables the installation work to proceed more efficiently through securing flexibility. It is time to develop technology for cables.

[Prior art literature]

[Patent Literature]

Patent Document 1: Korea Patent Publication No. 10-1540980 (published on Jul. 26, 2011)

An object of the present invention is to provide a communication cable. More specifically, the present invention can improve crosstalk characteristics between twisted pairs inside cables and minimize the influence of interference between external cables at the time of high-speed data transmission. To provide an Ethernet cable that satisfies both hardening and light weight characteristics.

As a means for solving the above technical problem,

The present invention provides a plurality of stranded wire portions formed by twisting at least two conductive wires covered with an insulator in a helical manner; a separator for separating the plurality of stranded wires from each other; and a sheath portion surrounding the plurality of stranded wire portions and the separator, wherein the separator includes a carbon particle-containing material, and has the same number of ribs as the number of the plurality of softer portions, and the length of each rib is equal to that of the conductive wire. larger than the diameter, and the ratio of the average thickness of each rib to the average diameter of the conductor is 0.26 to 0.69.

In addition, the present invention provides a communication cable, characterized in that the spacing between adjacent twisted-pair portions spaced apart by the separator is 0.15 mm to 0.35 mm.

Further, the present invention provides a communication cable, wherein the length of the separator is smaller than the inner diameter of the sheath.

In addition, the present invention provides a communication cable characterized in that the shape of the separator is "╋" shape.

In addition, the present invention provides a communication cable, characterized in that the shape of the separator has a curved shape so that any one adjacent in the vertical or left and right directions in the "╋" shape surrounds the stranded wire portion.

In addition, the present invention provides a communication cable, characterized in that the carbon particle-containing material is carbon fiber or carbon powder.

In addition, the present invention provides a communication cable, characterized in that the separator further includes a highly conductive material.

In addition, the present invention provides a communication cable, characterized in that the highly conductive material has an electrical conductivity of 5 times or more compared to the carbon particle-containing material.

In addition, the present invention provides a communication cable, characterized in that the highly conductive material is copper (Cu).

In addition, the present invention provides a communication cable, characterized in that the content of the highly conductive material contained in the separator is 5% to 45% of the carbon particle-containing material.

In addition, the present invention is characterized in that the separator further includes a polymer resin, and the content of the polymer resin is 9:1 to 3:7 relative to the total content of the carbon particle-containing material and the high conductive material, A communication cable is provided.

In addition, the present invention, the polymer resin, polyethylene (Polyethylene, PE), polypropylene (Polypropylene, PP) and polyvinyl chloride (Polyvinyl Chloride, PVC) characterized in that at least one selected from the group consisting of, communication cable provides

In addition, the present invention provides a communication cable, characterized in that the separator is manufactured by mixing carbon fibers and a polymer resin, and is manufactured by performing a structural molding extrusion method on the carbon fibers through branching synthesis.

Further, the present invention provides a communication cable, characterized in that the separator is manufactured by performing a weaving forming method.

In addition, the present invention provides that the plurality of stranded wire portions include first to fourth stranded wire portions, and the first to fourth stranded wire portions are separated from each other by the separator, respectively, satisfying Equation 1 below. It provides a communication cable, characterized in that.

[Formula 1]

In Equation 1, X is from the center of the nth stranded portion to the center of the n+2 stranded portion when the first to fourth stranded portions are circular and sequentially separated from each other in a clockwise or counterclockwise direction by the separator. is the distance of, R _n is the radius of the nth stranded portion, R _n+1 is the radius of the n+1st stranded portion, R _n+2 is the radius of the n+2th stranded portion, P is the thickness of the separator, n is 1 or 2.

In addition, the present invention provides a communication cable, characterized in that the communication cable further includes a shielding layer directly surrounding the plurality of twisted pairs.

In addition, the present invention provides a communication cable, characterized in that the shielding layer includes a carbon particle-containing material and a highly conductive material.

In addition, the present invention provides a communication cable, characterized in that the shielding layer is manufactured by performing a weaving forming method or a braiding forming method.

In addition, the present invention provides a communication cable, characterized in that the communication cable satisfies the following Equation (2).

[Formula 2]

D _c = R _n + R _n+2 + 2S + X

In Equation 2, D _c is the diameter of the communication cable, R _n is the radius of the nth twisted pair part, R _n+2 is the radius of the n+2 twisted pair part, S is the thickness of the sheath part, and n is 1 or 2 is

In addition, the present invention provides a communication cable, characterized in that the communication cable satisfies the ANSI/TIA-568-C.2 6.4.8 NEXT loss standard.

The communication cable according to the present invention can reduce the cable thickness while satisfying crosstalk characteristics between twisted pairs inside the cable and minimizing the influence of interference between external cables during high-speed data transmission.

In addition, since the communication cable according to the present invention includes a separator including carbon fiber, it is possible to improve flexibility while retaining crosstalk characteristics and interference characteristics between external cables equal to or higher than those of existing 1Gbps-class communication cables.

In addition, the communication cable according to the present invention improves thinness and weight reduction at the same time, so that the application characteristics of the communication cable, that is, when applied as a bundle in which several cables are bundled through a data center, handling on installation work, By reducing the burden on the connector to which the cable is connected, it is possible to solve the problem of management burden such as grounding failure.

In addition, the communication cable according to the present invention, as described above, has improved flexibility, thinness, and light weight, so that when a plurality of cables are installed in a building, a reduction in the installation area and easiness of installation work can be secured, and additionally It can help to reduce the weight when installing in aircraft, ships and vehicles.

The accompanying drawings are intended to explain the contents of the present invention in more detail to those skilled in the art, but the technical spirit of the present invention is not limited thereto.

1 is a diagram schematically showing the structure of a conventional Ethernet cable.

2 is a diagram schematically showing the structure of a communication cable according to the present invention.

3 is a diagram schematically showing the structure of another exemplary communication cable according to the present invention.

Hereinafter, the communication cable according to the present invention will be sequentially described in detail, but the scope of the communication cable is not limited by the following description.

In particular, terms such as 'consisting of' or 'comprising' used in the present specification below should not be construed as necessarily including all of the components or steps described in the specification, and some components or steps If they are not included, and when additional components or steps are further included, it should also be interpreted as intended from the term.

Also, terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.

As used herein, the term "communication cable" may be used to refer to all cables for data transmission that are generally used, and according to the frequency standard, Cat (Category).3, Cat.4, Cat.5, It may be classified into Cat.6 and Cat.6A, etc., and may be classified and included into UTP (Unshielded Twisted Pair), FTP (Foiled Twisted Pair), and STP (Shielded Twisted Pair) according to the shielding standard. Also, the term "communication cable" may be used for cable applications of various structures including patch cords, backbone cables, and horizontal cables, but the present invention is not limited to these applications. In general, the present invention may be used in military, industrial, telecommunications, computer, data communications, and other cable applications.

Although the terms used in the present invention have been described as general terms widely used in the technical field related to the present invention, the meaning of the terms used in the present invention is the intention of a technician in the relevant field, the emergence of new technology, examination standards or precedents. It may vary depending on Some terms may be arbitrarily selected by the applicant, and in this case, the meaning of the arbitrarily selected terms will be described in detail. Terms used in the present invention should be interpreted as meanings reflecting the overall context of the specification, not just dictionary meanings.

The present invention provides a plurality of stranded wire portions formed by twisting at least two conductive wires covered with an insulator in a helical manner; a separator for separating the plurality of stranded wires from each other; and a sheath portion surrounding the plurality of twisted pair portions and the separator.

The plurality of stranded wire portions may be formed by twisting at least two conductive wires each independently coated with an insulator on the outer surface, and the conductive wires may be in the form of a solid or a twisted strand of a plurality of conductive wires. have. In general, although it has been described that four stranded wire parts are included in the sheath part according to the present invention to be described later, it is not limited thereto and various modifications are possible.

In one example, when the twisted pair part is configured in plurality, the pitch of each twisted wire part may be adjusted to be different from each other. This is because, when the pitch of each twisted pair is the same or similar, internal interference or crosstalk may easily occur between the twisted pairs. Although not particularly limited, for example, the pitch of each twisted pair according to the present invention may be formed to be different from each other, and may have a difference of 0.1 mm or more from each other.

The separator serves to prevent electrical interference between the twisted-pair parts by separating the twisted-pair parts from each other. More specifically, the separator suppresses the occurrence of electromagnetic induction between the twisted-pair parts, thereby preventing crosstalk between the twisted-pair parts. If necessary, in order to prevent crosstalk due to internal interference between the twisted pair parts, a cross filler (eg, a polymer resin or a metal thin film, etc.) may be included as a separate configuration, but is not particularly limited thereto.

In one example, the separator may have the same number of ribs as the number of the plurality of twisted wire portions.

As used herein, the term “rib” may be used to refer to a protrusion that separates each twisted pair in the separator.

Each length of each rib of the separator may be greater than a diameter of the conducting wire. When the length of the rib is smaller than the diameter of the conducting wire, each stranded wire portion cannot maintain the separation structure by the separator, so there is a problem in that the NEXT characteristic is deteriorated.

In addition, a ratio of the average thickness of each of the ribs to the average diameter of the conductor may be 0.26 to 0.69. If the ratio of the average thickness of each rib to the average diameter of the conductor is out of the limited range, that is, less than 0.26, there may be a problem in that the NEXT characteristic deteriorates, and if it exceeds 0.69, the volume and weight increase. Therefore, there is a problem in that it does not satisfy the characteristics of thinning and weight reduction.

In the present invention, the separator can be produced including a carbon particle-containing material.

As described above, the communication cable according to the present invention includes a carbon particle-containing material having metallic shielding properties rather than a conventional separator made of polyethylene or the like, so that the thickness of the separator is determined by molding processing of the carbon particle-containing material. It is possible to apply the minimum possible thickness, and through this, the outer diameter of the entire cable can be reduced, and there is a very big advantage in that the weight increase can be minimized because the specific gravity is very low compared to the metal material.

The type of the carbon particle-containing material is not particularly limited, but, for example, carbon fiber or carbon powder may be used.

In the case of the separator, a highly conductive material may be included in addition to the above-described carbon particle-containing material. When the separator includes a highly conductive material other than the carbon particle-containing material, electrical conductivity may be increased, and electromagnetic wave shielding performance may be further improved.

In the case of the highly conductive material, the electrical conductivity may be 5 times or more or 10 times or more compared to the carbon particle-containing material, and the higher the electrical conductivity, the higher the electrical conductivity is, so high-speed data transmission of the cable is possible, so the upper limit is particularly limited However, for example, it may be 30 times or less, 20 times or less, or 15 times or less. In consideration of the electrical conductivity, the highly conductive material may be aluminum (Al) or copper (Cu), but more preferably copper (Cu).

In one example, when the separator includes the carbon particle-containing material and the high conductive material, the content of the high conductive material in the separator may be 6% to 44% compared to the carbon particle-containing material.

The range of the content of the high conductive material can maximize the improvement of the electromagnetic wave shielding performance and at the same time take into account the thickness of the cable that needs to be thinned. When the content of the high conductive material is less than 6% of the carbon particle-containing material, the electromagnetic wave The effect of reducing the outer diameter (thinning) is insignificant due to the low shielding property effect, and when the content of the high conductive material is more than 44% of the carbon particle-containing material, the weight increases and production cost increases due to the cable application. There is this.

For the narrowing of the cable mentioned in the present invention, a factor that can affect the thickness of the overall outer diameter of the cable is very important. Among them, the thickness of the separator may also be an important factor in reducing the thickness of the cable.

In one example, a separation distance between adjacent stranded wires spaced apart by the separator in relation to the thickness of the separator may be 0.15 mm to 0.35 mm.

The separation distance between adjacent twisted-pair parts spaced apart by the separator maximizes the improvement of electromagnetic wave shielding performance, and at the same time takes into account the thickness of the cable that needs to be narrowed. When the spacing between adjacent twisted-pair parts spaced apart by the separator is less than 0.15 mm There is a problem in that electromagnetic wave shielding characteristics are unsatisfactory, and when the separation distance between adjacent stranded wires spaced apart by the separator is more than 0.35 mm, the outer diameter of the cable increases, so that the thinning characteristics cannot be satisfied. In particular, the electromagnetic wave shielding characteristic that occurs when the separation distance between adjacent stranded parts spaced apart by the separator is less than 0.15 mm is "ANSI/TIA-568-C.2 6.4.8 NEXT loss", a standard related to the electromagnetic wave shielding characteristic evaluation As followed, the specific evaluation method is the same as the general evaluation method of "ANSI/TIA-568-C.2 6.4.8 NEXT loss".

In one example, in the present invention, the plurality of stranded wire portions include first to fourth stranded wire portions, and the first to fourth stranded wire portions are separated from each other by the separator, and satisfy Equation 1 below. It is possible to provide a communication cable, characterized in that.

[Formula 1]

In Equation 1, X is from the center of the nth stranded portion to the center of the n+2 stranded portion when the first to fourth stranded portions are circular and sequentially separated from each other in a clockwise or counterclockwise direction by the separator. is the distance of, R _n is the radius of the nth stranded portion, R _n+1 is the radius of the n+1st stranded portion, R _n+2 is the radius of the n+2th stranded portion, P is the thickness of the separator, n is 1 or 2.

However, in the communication cable satisfying Equation 1, it is premised that the first to fourth twisted pair portions in the communication cable are each precisely divided into quarters around the cable and compactly arranged while maintaining the initial shape, Equation 1 may not be applied when the separator is not precisely divided into quarters due to bending or bending of the separator.

More specifically, when the first to fourth twisted pairs are asymmetrically disposed in the cable, the structure ( For example, other equations may be applied in relation to the distance between each twisted pair) or data signal transmission capacity (Shannon capacity), and the communication cable according to the present invention is not particularly limited to satisfying Equation 1 above.

In the communication cable according to the present invention, in order to suppress the electrical interference between the twisted pair parts, the separator may include a polymer resin in addition to the above-mentioned components, for example, polyethylene (PE), polypropylene (Polypropylene) , PP), polyvinyl chloride (Polyvinyl Chloride, PVC), etc., or may be made of a mixture of these materials.

When a polymer resin is additionally included in the separator, the content of the polymer resin is 9:1 to 3:7, preferably 8: relative to the total content of the components included in the separator, that is, the carbon particle-containing material and the conductive material. 2 to 4:6, more preferably 7:3 to 5:5.

For example, if the content of the polymer resin is 9:1 to 3:7 relative to the total content of the carbon particle-containing material and the high conductive material, if the content of the carbon particle-containing material and the high conductive material is 90 g, the The content of the polymer resin may be interpreted as meaning that it may be 10 g to 210 g.

When a polymer resin is additionally included in the separator, the content of the polymer resin is less than 9:1 to 3:7 relative to the total content of the components included in the separator, that is, the carbon particle-containing material and the highly conductive material. There is a problem that it cannot be maintained, and when it exceeds 9:1 to 3:7 compared to the total content of the components included in the separator, that is, the carbon particle-containing material and the high-conductive material, the electromagnetic wave shielding properties are unsatisfactory and the overall cable outer diameter is increased. There are problems you can do.

As described above, when the separator includes a polymer resin in addition to the carbon particle-containing material and the highly conductive material, it may be manufactured in various manufacturing examples.

When the separator includes a polymer resin in addition to the carbon particle-containing material and the conductive material, the separator may be manufactured by performing a structural molding extrusion method. In particular, in this case, as the carbon particle-containing material, carbon fibers may be used, and the carbon fibers may be manufactured by performing a structural molding extrusion method through branch synthesis.

In one example, when the separator includes a polymer resin in addition to the carbon particle-containing material and the conductive material, it may be manufactured by performing a weaving molding method. In particular, in this case, carbon fibers may be used as the carbon particle-containing material, and after plating the carbon fibers with a conductive material, weaving and molding are performed, and then the polymer resin is added and mixed. can

In another example, as the carbon particle-containing material, carbon fiber may be used, and after plating the carbon fiber with a conductive material, it is pulverized to produce it in a powder form by extrusion processing with the polymer resin. can

In another example, the carbon particle-containing material may use carbon powder, and is manufactured by doping the carbon powder with a highly conductive material in the form of particles, and then performing extrusion processing with the polymer resin. can do.

The manufacturing process of the separator according to the present invention may be performed in the same manner as the separator manufacturing process included in a typical communication cable, that is, an Ethernet cable production process, except for the above.

The sheath part surrounds the stranded wire part and the separator, and serves to protect the stranded wire part and the separator from external impact. Furthermore, the sheath unit may serve to block alien crosstalk caused by electromagnetic waves generated from other adjacent communication cables or other electronic equipment. In general, in order to block external interference from the outside, the sheath part may be made of PE, PP, PVC, LSZH (Low Smoki Zero Halogen or Olefin)-based polymer material, but in the present invention, as described above, carbon When a separator including a fiber is applied, and the separator is structurally deformed to have a curved shape to surround any one of the adjacent strands in the vertical or horizontal direction, as will be described later, external interference that may be generated between external cables If necessary, the sheath portion may include conductive particles, and in this case, electromagnetic wave shielding or mechanical properties may be simultaneously satisfied by the conductive particles.

In addition, the present invention, in one example, may provide a communication cable characterized in that the following Equation 2 is satisfied.

[Formula 2]

D _c = R _n + R _n+2 + 2S + X

In Equation 2, D _c is the diameter of the communication cable, R _n is the radius of the nth twisted pair portion, R _n+2 is the radius of the n+2 twisted pair portion, S is the thickness of the sheath layer, and n is 1 or 2.

However, in the communication cable satisfying Equation 2, it is premised that the first twisted pair part to the fourth twisted pair part in the communication cable are each precisely divided into quarters around the cable and are compactly arranged while maintaining the initial shape, Equation 2 may not be applied when the separator is not precisely divided into quarters due to bending or bending of the separator.

More specifically, when the first to fourth twisted pairs are asymmetrically disposed in the cable, the structure ( For example, other equations may be applied in relation to the distance between each twisted pair) or data signal transmission capacity (Shannon capacity), and the communication cable according to the present invention is not particularly limited to satisfying Equation 2 above.

As described above, in the communication cable according to the present invention, since the separator can be made of a carbon fiber material, the separator can be more easily manufactured in a “╋” shape.

The separator may provide a communication cable characterized in that it has a “╋” shape, but for example, the length or thickness of the upper and lower parts or the left and right parts may be different, and a separator of a different shape may be applied, especially It is not limited thereto.

2 is a diagram schematically showing the structure of a communication cable according to the present invention, in one example.

Referring to FIG. 2, in the communication cable 100 according to the present invention, the separator has a curved shape so that any one adjacent in the vertical or left and right directions in the "╋" shape surrounds the twisted pair part. to provide.

The communication cable according to the present invention is manufactured by including a carbon fiber separator inside, and additionally has a structure as shown in FIG. 2 , so that in addition to preventing crosstalk between internal twisted pairs, extraneous interference that can be issued between external cables more efficiently phenomenon can be effectively prevented.

In addition, the communication cable according to the present invention may satisfy the ANSI/TIA-568-C.2 6.4.8 NEXT loss standard.

The "ANSI/TIA-568-C.2 6.4.8 NEXT loss standard" is a standard related to the evaluation of electromagnetic wave shielding characteristics, as described above, and the specific evaluation method is the above "ANSI/TIA-568-C.2 6.4" It is the same as the general evaluation method of ".8 NEXT loss", and the communication cable according to the present invention satisfies the ANSI/TIA-568-C.2 6.4.8 NEXT loss standard, so that it can be specifically commercialized and utilized.

In addition, the communication cable according to the present invention may additionally include a shielding layer.

3 is a diagram schematically showing the structure of another exemplary communication cable according to the present invention.

Referring to FIG. 3 , the communication cable 100 according to the present invention may include a shielding layer 60 directly surrounding the stranded wire part 30 inside the sheath part 50 . When the communication cable according to the present invention additionally includes the shielding layer, the electromagnetic wave shielding phenomenon can be more efficiently performed.

In the case of the shielding layer, it may include the same components as the separator 40 according to the present invention described above, that is, a carbon particle-containing material and a highly conductive material, and may additionally include a polymer resin. Since they are the same, they are omitted below.

In one example, the manufacturing method of the inner shielding layer is not particularly limited, but may be manufactured by, for example, performing a weaving processing molding method or a braiding processing molding method to enable the production of a circular shape.

Hereinafter, the present invention will be described in more detail through specific experimental examples. However, these experimental examples are for illustrative purposes only, and the scope of the present invention is not limited to these experimental examples.

[Experimental Example 1] Weight measurement and evaluation

1) Experiment preparation

The weight per unit length (g/m) of a cable having a separator containing carbon particles and a highly conductive material was compared based on the weight per unit length (36.65 g/m) of a cable to which a general separator made of non-conductive resin was applied. .

Here, the reference product used a commercial UTP cable to which the separator material HDPE was applied, and the product to be evaluated was a UTP cable prototype in which the separator material was carbon fiber coated with copper.

2) Evaluation method

A plurality of prototypes having different doping rates of the highly conductive material (Cu) and thicknesses of the separators were measured for each unit length. In addition, the outer diameter of the UTP cable was measured for each separator thickness.

Here, the "doping rate" means the content of the high-conductivity material compared to the carbon particle-containing material included in the separator.

The weight measurement results are shown in Table 1 below.

division		Separator thickness (mm)
		0.4	0.35	0.3	0.25	0.2	0.15	0.1
Doping rate (%)	0	38.34	37.79	37.24	36.68	36.11	35.54	34.95
	3	38.75	38.16	37.55	36.94	36.32	35.70	35.06
	6	39.17	38.52	37.87	37.20	36.53	35.86	34.92
	18	40.82	39.98	39.12	38.26	37.38	36.50	35.60
	31	42.61	41.55	40.48	39.40	38.30	37.19	36.06
	44	44.40	43.13	41.84	40.54	39.22	37.88	36.53
	65	47.30	45.68	44.04	42.38	40.70	39.00	37.28
Cable outer diameter (mm)		6.00	5.93	5.86	5.79	5.71	5.64	5.57

3) Evaluation criteria: The weight increase rate was measured and shown in Table 2 below. In this case, the weight increase rate should be less than 20%.

division		Separator thickness (mm)
		0.4	0.35	0.3	0.25	0.2	0.15	0.1
Doping rate (%)	0	1.05	1.03	1.02	1.00	0.99	0.97	0.95
	3	1.06	1.04	1.02	1.01	0.99	0.97	0.96
	6	1.07	1.05	1.03	1.02	1.00	0.98	0.95
	18	1.11	1.09	1.07	1.04	1.02	1.00	0.97
	31	1.16	1.13	1.10	1.08	1.05	1.01	0.98
	44	1.21	1.18	1.14	1.11	1.07	1.03	1.00
	65	1.29	1.25	1.20	1.16	1.11	1.06	1.02

As can be seen in Table 2, when the separator thickness is 0.4 mm or more and when the doping rate is 44% or more, the required weight increase rate was not satisfied (spec-out).

[Experimental Example 2] Measurement and evaluation of electromagnetic wave shielding performance

1) Experiment preparation

The loss by NEXT of cables containing carbon particles and highly conductive materials was compared based on the TIA standard.

2) Evaluation method

The minimum difference (margin, dB) between the NEXT loss and the TIA standard in each frequency band was measured for a plurality of prototypes with different doping rates of the highly conductive material (Cu) and different thicknesses of the separators.

Here, the "NEXT loss" is the ratio of the input-output signal wave length (

) means

The measurement results are shown in Table 3 below.

Frequency (MHz)	Category 3 (dB)	Category 5e (dB)	Category 6 (dB)	Category 6A (dB)
0.772	43.0	n/s	n/s	n/s
1.00	41.3	65.3	74.3	74.3
4.00	32.3	56.3	65.3	65.3
8.00	27.8	51.8	60.8	60.8
10.00	26.3	50.3	59.3	59.3
16.00	23.2	47.2	56.2	56.2
20.00	-	45.8	54.8	54.8
25.00	-	44.3	53.3	53.3
31.25	-	42.9	51.9	51.9
62.50	-	38.4	47.4	47.4
100.00	-	35.3	44.3	44.3
200.00	-	-	39.8	39.8
350.00	-	-	38.3	38.3
300.00	-	-	-	37.1
400.00	-	-	-	35.3
500.00	-	-	-	33.8

Based on the measured results, the margin compared to the TIA standard was calculated and shown in Table 4 below. In this case, the margin compared to the TIA standard should be a (+) value.

division		Separator thickness (mm)
		0.4	0.35	0.3	0.25	0.2	0.15	0.1
Doping rate (%)	0	4.18	2.45	0.65	-2.42	-3.53	-5.33	-6.30
	3	5.75	3.97	2.56	0.11	-2.28	-2.95	-5.09
	6	6.51	4.95	3.23	1.69	0.82	0.09	-2.23
	18	7.81	5.96	3.81	2.46	0.98	0.21	-1.84
	31	8.26	7.33	5.58	3.23	1.48	0.64	-1.33
	44	9.08	8.33	6.58	4.83	2.08	1.16	-1.09
	65	9.62	9.49	8.86	6.84	3.97	1.83	0.23

As can be seen in Table 4, the margin compared to the TIA standard required for a separator thickness of 0.1 mm or less and a doping rate of 3% or less was not satisfied (spec-out).

From Experimental Examples 1 and 2 and Tables 1 to 4, the results thereof, When the separator thickness is 0.15 mm to 0.35 mm and the doping rate is 6% to 44%, a cable that satisfies the NEXT characteristics of the TIA standard and at the same time reduces the cable outer diameter by up to 6% (thinnerization) without excessive weight increase (lightening) It was confirmed that it can be provided.

The foregoing description of the present application is for illustration, and those of ordinary skill in the art to which the present application pertains will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and likewise components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present application.

[Explanation of code]

10: lead wire

20: insulator

30: stranded part

40: separator

50: sheath

60: shielding layer

100: communication cable

Claims (20)

1. a plurality of stranded wire portions formed by twisting at least two conductive wires covered with an insulator in a helical manner;

   a separator for separating the plurality of stranded wires from each other; and

   a sheath portion surrounding the plurality of stranded wire portions and the separator;

   The separator includes a carbon particle-containing material and has the same number of ribs as the number of the plurality of soft parts,

   The length of each rib is greater than the diameter of the conducting wire,

   wherein the ratio of the average thickness of each rib to the average diameter of the conductor is 0.26 to 0.69.
2. According to claim 1,

   A communication cable, characterized in that the separation distance between adjacent twisted-pair portions spaced apart by the separator is 0.15 mm to 0.35 mm.
3. According to claim 1,

   A length of the separator is smaller than an inner diameter of the sheath.
4. According to claim 1,

   The shape of the separator is a "╋" shape, characterized in that the communication cable.
5. According to claim 1,

   The shape of the separator is, in the "╋" shape, a communication cable, characterized in that it has a curved shape so that any one adjacent in the vertical or left and right directions surrounds the stranded part.
6. According to claim 1,

   The carbon particle-containing material is a communication cable, characterized in that carbon fiber or carbon powder.
7. According to claim 1,

   The separator, characterized in that it further comprises a highly conductive material, communication cable.
8. 8. The method of claim 7,

   The highly conductive material, characterized in that the electrical conductivity is 5 times or more compared to the carbon particle-containing material, a communication cable.
9. 9. The method of claim 8,

   The highly conductive material is copper (Cu), characterized in that the communication cable.
10. 8. The method of claim 7,

    The content of the highly conductive material included in the separator is 5% to 45% of the carbon particle-containing material, the communication cable.
11. 8. The method of claim 7,

    The separator further comprises a polymer resin,

    The content of the polymer resin is 9:1 to 3:7 compared to the total content of the carbon particle-containing material and the high conductive material, the communication cable.
12. 12. The method of claim 11,

    The polymer resin, characterized in that at least one selected from the group consisting of polyethylene (Polyethylene, PE), polypropylene (PP) and polyvinyl chloride (PVC), communication cable.
13. 12. The method of claim 11,

    The separator is manufactured by mixing carbon fiber and a polymer resin, characterized in that it is manufactured by performing a structural molding extrusion method through branch synthesis of the carbon fiber, communication cable.
14. 12. The method of claim 11,

    The separator is a communication cable, characterized in that manufactured by performing a weaving forming method.
15. According to claim 1,

    The plurality of twisted pair parts includes a first twisted pair part to a fourth twisted pair part, and the first twisted wire part to the fourth twisted pair part are each separated from each other by the separator, and satisfy Equation 1 :

    [Formula 1]

    

    In Equation 1, X is from the center of the nth stranded portion to the center of the n+2 stranded portion when the first to fourth stranded portions are circular and sequentially separated from each other in a clockwise or counterclockwise direction by the separator. is the distance of, R _n is the radius of the nth stranded portion, R _n+1 is the radius of the n+1st stranded portion, R _n+2 is the radius of the n+2th stranded portion, P is the thickness of the separator, n is 1 or 2.
16. According to claim 1,

    The communication cable, characterized in that it further comprises a shielding layer directly surrounding the plurality of twisted pair, communication cable.
17. 17. The method of claim 16,

    The shielding layer, characterized in that it comprises a carbon particle-containing material and a highly conductive material, communication cable.
18. 18. The method of claim 17,

    The shielding layer, characterized in that manufactured by performing a weaving forming method or a braiding forming method, a communication cable.
19. According to claim 1,

    The communication cable, characterized in that it satisfies the following Equation 2, the communication cable:

    [Formula 2]

    D _c = R _n + R _n+2 + 2S + X

    In Equation 2, D _c is the diameter of the communication cable, R _n is the radius of the nth twisted pair part, R _n+2 is the radius of the n+2 twisted pair part, S is the thickness of the sheath part, and n is 1 or 2 is
20. According to claim 1,

    The communication cable, characterized in that it satisfies the ANSI/TIA-568-C.2 6.4.8 NEXT loss standard, the communication cable.

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