KR20130041491A

KR20130041491A - Communication cable

Info

Publication number: KR20130041491A
Application number: KR1020110105767A
Authority: KR
Inventors: 정보찬
Original assignee: 엘에스전선 주식회사
Priority date: 2011-10-17
Filing date: 2011-10-17
Publication date: 2013-04-25

Abstract

PURPOSE: A communication cable is provided to improve durability by including sheath members in the inside and the outside of a braid member. CONSTITUTION: A core(100) includes a plurality of conductive lines. The conductive line is coated with an insulator. A first sheath member(300) includes LSZH(Low Smoke Zero Halogen). A braid member(500) surrounds the first sheath member. A second sheath member(700) surrounds the braid member.

Description

Communication cable {COMMUNICATION CABLE}

The present invention relates to a communication cable. More specifically, the present invention relates to telecommunication cables for use in deep sea oil drilling ships (Drill Ships), floating production storage and offloading (FPSO) or cruise ships.

In general, a UTP communication cable (or LAN cable), which is a cable used for wired communication, refers to an unshieled twisted pair cable. That is, commonly used UTP communication cables are also referred to as unshielded pair cables and unshielded twisted pair cables.

General UTP communication cable is a standard signal line used in LAN card. The UTP communication cable may be composed of a core that includes a plurality of pairs of conductor wires and an outer sheath to protect the outside of the core.

When such a general UTP communication cable is used to establish a communication environment inside the facilities described below, some problems may occur.

Recently, as the amount of oil drilling in a single well is reduced, many offshore structures are being installed to discover new wells.

For example, deep sea oil drilling ships (drill ships) are structures that drill oil or gas on the seabed, and floating production storage and offloading (FPSO) means offshore plants or A special vessel capable of refining and storing crude oil extracted from deep-sea oil drilling ships (drill ships), which can be unloaded to a shuttle tanker or other transfer location, that is, storage, processing and unloading functions of crude oil. Means a special ship equipped with both.

Deep-sea oil drilling rigs or floating oil production storage and unloading facilities are those used in harsh and isolated environments. These facilities can be subject to continuous physical shocks due to the harsh environment of the sea.

In addition, the internal environment of these facilities is distinguished from the internal environment of buildings, such as a general land. For example, these facilities can be easily exposed to contaminants, such as oil components contained in the oil being drilled, and contaminants, such as mud, that can enter during the drilling process.

In addition, deep sea oil drilling vessels or floating crude oil production storage and unloading equipment is difficult to prepare a separate evacuation space in the event of a fire, and flammable materials are exposed at all times, which may cause a great loss of life. In the case of communication cables installed at unloading equipment, the flame retardancy needs to be high.

In addition, even when a fire occurs in a deep sea oil drilling vessel or a floating oil production storage and unloading facility, it is necessary to minimize the possibility of the smoke generated during the ignition of the communication cable installed in the facility. This is because the fire damage caused by the fire is greater than the fire damage caused by the fire.

In addition, in the case of the communication cable for marine equipment, it is necessary to satisfy the electrical characteristics required for each grade of the communication cable, there is a problem that can not reflect the material or design conditions of the general communication cable as it is.

Therefore, the communication cable installed in order to establish a communication environment in the interior spaces of the above-described facility should be distinguished from the general UTP communication cable.

The present invention provides deep sea oil drilling vessels (Drill Ship, Drill Ship), Floating Production Storage and Offloading (FPSO) or cruise ship which satisfy the requirements of durability, oil resistance, mud resistance, flame retardancy and low flammability. An object of the present invention is to provide a communication cable for use in a ship.

In order to solve the above problems, the present invention provides a core comprising a plurality of pairs of conductor wires covered with an insulating material, the first sheath member surrounding the core, including a halogen-free low-flammable material, the braid member surrounding the first sheath member And a second sheath member wrapped around the braided member, the second sheath member including at least one of a halogen-free low flame retardant, an oil resistant reinforcement additive, and a flame retardant reinforcement additive.

In this case, the flame retardant reinforcing additive included in the second sheath member may include an inorganic hydroxide.

In addition, the oil-resistant reinforcing additive included in the second sheath member includes a crosslinking catalyst including a tin component, and the content thereof may be 1.5 wt% to 3.5 wt%.

And, the oil resistance of the second sheath member is cracked on the surface of the communication cable when bending with a radius of curvature having 9 times the outer diameter of the communication cable after 96 hours at a temperature of 100 degrees after immersing the communication cable in a predetermined experimental oil. May not occur.

Here, the oxygen index of the first sheath member may be lower than the oxygen index of the second sheath member.

In this case, the oxygen index of the first sheath member is about 35, and the oxygen index of the second sheath member may be 37 or more.

In addition, the second sheath member may satisfy the flame retardancy standard of IEC 60332-3A or higher.

In this case, the hardness of the second sheath member may have a hardness greater than that of the first sheath member.

In addition, the hardness of the first sheath member may be 94.5 to 96.5 based on Shore A durometer, and the hardness of the second sheath member may be 97.5 to 99.5 based on Shore A durometer.

In addition, the second sheath member may undergo a water crosslinking process or a natural crosslinking process.

Here, the water crosslinking process may be performed through a crosslinking reaction for about 6 hours at a temperature of about 65 degrees Celsius in a chamber supplied with water vapor.

In addition, the plurality of pairs constituting the core may further include a spacer having a '十' -shaped cross section spaced apart from each other.

Here, the electromagnetic shielding tape may be attached to each of the plurality of pairs constituting the core.

The electromagnetic shielding tape may be an aluminum tape coated with a plastic or resin material.

Here, the auxiliary braiding member may be further included between the core and the first sheath member.

In this case, the braiding member is made of bronze copper, and may have a braiding rate of 88% or more.

In addition, the auxiliary braiding member is made of a tinned copper (Tinned copper) material, the braiding ratio of the auxiliary braiding member may be 60% or more.

In addition, in order to solve the above problems, the present invention includes a plurality of pairs of insulated conductor wires, cushioning material provided on the outside of the conductor wire, reinforcing material provided on the outside of the buffer material, sheath material provided on the outside of the reinforcing material, , Characteristic impedance (Zo) is 85 to 115 ohms (ohm), attenuation amount (IL) has a characteristic of 0 decibel (dB) or more, the sheath material is composed of LSZH (halogen-free low-flammable material) material, oil-resistant reinforcing additives and It is possible to provide a communication cable further comprising at least one or more of flame retardant reinforcing additives.

In addition, the conductor wire is covered with an insulating material and has a predetermined conductor diameter (d), wherein the insulation outer diameter (D) and the conductor diameter (d), which are distances between the centers of the conductor wires constituting each pair, are 1.8 <insulation outer diameter. (D) / conductor diameter (d) <1.9.

In order to solve the above problems, the present invention provides a plurality of pairs of conductor wires having a predetermined first conductor diameter d1, and each conductor wire such that the distance between the centers of the conductor wires constituting each pair has a first insulation outer diameter D1. When the characteristic impedance (Zo) of a communication cable including an insulating material surrounding the conductor and a cushioning material surrounding the outside of the plurality of pairs of conductor wires has an ohm of 85 to 115, and the attenuation amount is 0 decibel or more, Further comprising a reinforcing material surrounding the outside of the cushioning material and a sheath material surrounding the outside of the reinforcing material, the conductor diameter (d) and the insulating outer diameter (D) larger than the first conductor diameter (d1) and the first insulation outer diameter (D1) It provides a communication cable having.

In this case, the conductor diameter (d) and the insulating outer diameter (D) may have a value of 1.00 times to 1.50 times the first conductor diameter (d1) and the first insulating outer diameter (D1).

In addition, the first thickness t1 of the shock absorbing material of the communication cable having the conductor wire having the first conductor diameter d1 may be smaller than the thickness t of the shock absorbing material of the communication cable having the conductor diameter d. .

In addition, the thickness t may have a value of 1.20 times to 3 times the first thickness t1.

Here, the insulation outer diameter D and the conductor diameter d, which are distances between the centers of the conductor lines constituting each pair, may have a relationship of 1.8 <insulation outer diameter D / conductor diameter d <1.9.

In addition, the reinforcing material is composed of a metallic braiding member, the braiding ratio of the reinforcing material may be 88% or more.

In addition, the sheath material may include an oil resistant reinforcement including a crosslinking catalyst including a tin component or a flame retardant including an inorganic hydroxide.

Here, the hardness of the sheath material has a hardness greater than the hardness of the buffer material, after immersing the communication cable in a predetermined test oil after bending at a radius of curvature having nine times the outer diameter of the communication cable after 96 hours at a temperature of 100 degrees Celsius. Cracks may not occur on the surface of the communication cable.

In this case, the test oil may be hydrogenated naphthenic refined oil.

In addition, the oxygen index of the buffer material is lower than the oxygen index of the sheath material, the flame retardancy of the sheath material may satisfy the standard of IEC 60332-3A or more.

The communication cable according to the present invention is provided with a sheath member inside and outside with a braiding member interposed therebetween, providing durability enough to be used in facilities in rough environments such as deep sea oil drilling vessels or floating oil production storage and unloading facilities. can do.

In addition, the communication cable according to the present invention can satisfy the oil resistance or mud resistance by adding an oil resistant reinforcing additive to the second sheath member.

In addition, the communication cable according to the present invention may be more than a predetermined size of the oxygen index of the second sheath member, it can satisfy the flame retardancy required by the IEC 60332-3A standard.

In addition, the communication cable according to the present invention is exposed to the outside, the second sheath member which is in contact with foreign substances such as oil or a measure of flame retardancy and the like, and the components of the first sheath member to protect the conductor wire, manufacturing cost of the communication cable Can be lowered.

Accordingly, the communication cable according to the present invention is a deep sea oil drilling ship (drill ship, drill ship), floating crude oil production storage and unloading equipment (FPSO) that requires the requirements of durability, oil resistance, mud resistance, flame retardancy and low flammability Storage and offloading) or basic requirements that can be used in cruise ships and the like.

1 is a cut away perspective view of a communication cable of Cat. 5e class according to the present invention.
2 is a cross-sectional view of a communication cable of Cat. 5e rating according to the present invention shown in FIG.
FIG. 3 shows a cross-sectional view of one of the pairs constituting the core of the communication cable shown in FIGS. 1 and 2.
Figure 4 is a cut perspective view of a communication cable that satisfies the communication standard of Cat.6 according to the present invention.
5 is a cross-sectional view of the communication cable according to the invention shown in FIG. 4.
Figure 6 shows a cross-sectional view of the spacer provided in the communication cable of Cat.6 class of the communication cable according to the present invention.
7 is a cutaway perspective view of a communication cable of Cat.7 rating in accordance with the present invention.
8 is a cross-sectional view of a communication cable of the Cat.7 rating according to the present invention shown in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Like numbers refer to like elements throughout.

In general, communication cables can be categorized into categories according to the transmission speed (Mbps) and transmission band (MHz) of the communication signal. Communication cables of the grade are introduced in 3 to Cat.7 and the like.

As the computing environment improves, there is an improvement in communication speed, and the demand for higher grade communication cables is gradually increasing.

Specifically, the higher the transmission rate (Mbps) and the transmission band (MHz) transmitted by the communication cable, the higher the category (Category). Recently used Cat.5 grade cable has a transmission rate of 100Mbps and It has a transmission band of 100MHz, Cat.5e class cable has 400Mbps transmission rate and 100MHz transmission band, Cat.6 cable has 1Gbps transmission rate and 250MHz transmission band, Cat.6A class The cable has a transmission rate of 10 Gbps and a transmission band of 500 MHz. Cat.7 grade cables that are expected to be used in the future have a transmission rate of 10 Gbps and a transmission band of 600 MHz.

In particular, the communication cable according to the present invention is similar to the basic structure, and targets communication cables of Cat. 5e, Cat. 6, and Cat. 7, which are likely to be expanded in the future.

Hereinafter, some embodiments of a communication cable according to the present invention will be described with reference to the drawings.

1 is a cut away perspective view of a Cat. 5e grade communication cable 1000A in accordance with the present invention, and FIG. 2 is a cross-sectional view of a Cat.5e grade communication cable 1000A in accordance with the present invention.

The communication cable 1000A of the Cat.5e grade according to the present invention shown in FIG. 1 includes a core 100 including a plurality of pairs of conductor wires coated with an insulating material, and a material surrounding the core 100. It may include a first sheath member 300, a braiding member 500 of the first sheath member 300, a second sheath member 700 surrounding the braiding member 500.

The core 100 includes a conductor wire covered with a plurality of pairs of insulating materials. Although the communication cable according to the present invention illustrated in FIGS. 1 to 8 is shown to include a conductor wire coated with four pairs of insulating materials, the number of pairs is further increased according to requirements such as a communication standard. For example, 25 pairs).

Each conductor wire 10a1, 10a2, 10b1, 10b2, 10c1, 10c2, 10d1, 10d2 constituting each pair 10a, 10b, 10c, 10d is an insulating material 10a3, 10a4, 10b3, 10b4, 10c3, The conductor wires 10a1, 10a2, 10b1, 10b2, 10c1, 10c2, 10d1, and 10d2, which are covered with 10c4, 10d3, and 10d4, and constitute each pair 10a, 10b, 10c, and 10d, remain twisted with each other. do. The twisted pitches of the conductor wires constituting the pairs 10a, 10b, 10c, and 10d may be configured differently.

The colors of the insulating materials 10a3, 10a4, 10b3, 10b4, 10c3, 10c4, 10d3, and 10d4 that surround any one of the conductor wires constituting each pair 10a, 10b, 10c, and 10d have different colors. The conductor wires 10a1, 10a2, 10b1, 10b2, 10c1, 10c2, 10d1, and 10d2 coated with different colors may have their respective pin numbers specified in the standard.

The core 100 constituting the communication cable according to the present invention will be described taking an example of including the first to fourth pairs 10a, 10b, 10c, and 10d.

One of the conductor wires 10a1, 10a2, 10b1, 10b2, 10c1, 10c2, 10d1, 10d2 constituting each pair 10a, 10b, 10c, 10d may be used for communication, the other may be used for grounding, The color of the insulating material 10a3, 10a4, 10b3, 10b4, 10c3, 10c4, 10d3, and 10d4 covering the communication conductor wire may be different.

The conductor wire may be made of a copper material, and the insulation material covering the conductor wire may be polyethylene (PE, polyethylene) or high density polyethylene (HDPE). High-density polyethylene is a synthetic resin prepared by polymerizing ethylene and may be translucent in nature.

In addition, the first sheath member 300 that can provide a cushioning material or a cushioning function to protect the core is wrapped around the core 100.

The first sheath member 300 may be made of a low smoke zero halogen or low smoke free of halogen (LSZH) material.

The low halogen free flame retardant is characterized by low smoke generated during ignition, and the smoke density standard generally required for use in the above-described facilities by employing such a low halogen free flame retardant as a sheath member of a communication cable. In addition, it is possible to satisfy the main problem to be solved of the communication cable according to the present invention, along with the halogen concentration standard, the toxicity-related standard and other required physical properties.

In addition, the thickness of the first sheath member 300 is 1.2 times the thickness of the outer shell of the conventional UTP cable (ie, covering material or cushioning material) to sufficiently protect the core in a crushing environment and a harsh environment. It is preferable to comprise about 3 to about 3 times.

The communication cable according to the invention is intended for use in harsh environments, such as deep sea oil drilling vessels or floating crude oil production storage and unloading equipment.

Applying the general UTP communication cable described above to the harsh and harsh environment in which these facilities are installed can cause problems of durability or rigidity.

In addition, the communication cable according to the present invention needs to reinforce mechanical stiffness and the like which are distinguished from general UTP communication cables in addition to low flexibility.

The communication cable according to the present invention is mainly targeted to Cat.5e, Cat.6 and Cat.7 grades, and the communication cables of the above grades are so severe that oil drilling ships (drill ships, drill ships), floating crude oil production storage facilities It may be provided with a braiding member 500 as a reinforcing material to reinforce sufficient rigidity to be applied to (FPSO, Floating Production Storage and Offloading).

The communication cable according to the present invention uses a braiding member 500 having a braiding ratio of more than a predetermined braiding ratio. The braiding member 500 may be configured to surround the outside of the first sheath member 300.

The braiding member 500 may be made of a material such as bronze copper, and the braiding rate of the braiding member 500 may be 88% or more.

Braid rate F of the braiding member 500 may be calculated by the following first equation.

F = (mnd / 2πD) * (1 + π ² D ² L ² ) ^1/2 -Formula 1

Here, m is the exponent, n is the number of strokes, d is the wire diameter of the conductor wire, D is the braided lower diameter means the outer diameter before the braiding process, L means the braided pitch and the like.

The braiding member 500 has an effect of increasing durability by reinforcing rigidity when the communication cable is used in a rough environment with electromagnetic shielding effect between adjacent cables. In addition, the braiding member 500 may alleviate to some extent the pressing phenomenon of the core, which may cause a decrease in electrical characteristics of the communication cable of the core 100.

The wire diameter of the conductor wire of bronze plated copper material constituting the braiding member 500 may be about 0.3 mm, and the bronze plated copper material may be replaced with a galvanized steel material, a bronze material, or a tin plated wire.

The outside of the braiding member 500 is once again shielded by the second sheath member 700.

The second sheath member 700 may form an outer surface of the cable so that the braiding member 500 is not exposed to the outside.

Like the first sheath member 300, the second sheath member 700 may also be made of a low halogen zero flame retardant material (LSZH) or a low smoke free of halogen (LSZH) material.

However, the second sheath member 700 may easily expose the communication cable to foreign substances such as oil or mud due to the uniqueness of the installation space.

When the halogen-free low-flammable material is exposed to oil (or mud containing oil), there is a risk of chemical dissolution by the oil, so that the second sheath member may be oil (or It is necessary to prevent it from melting in the mud containing oil).

Accordingly, the second sheath member 700 may further include an oil-resistant reinforcement as a basic component of the halogen-free low-flammable material, and to secure oil resistance by lowering the possibility of dissolving the halogen-free low-flame material into oil.

The oil resistant reinforcement may include a crosslinking catalyst of a tin component. The oil resistant reinforcement may be used as a catalyst for the crosslinking process described later. The oil resistant reinforcement included in the second sheath member 700 may be 1.5 wt% to 3.5 wt%.

Specifically, the oil resistance of the communication cable according to the present invention covered by the second sheath member 700 further including an oil resistant reinforcement may be confirmed through an oil resistance test as follows.

That is, the oil resistance can be tested by immersing the communication cable in a predetermined test oil and then bending the communication cable after a predetermined time passes at a predetermined temperature to check the occurrence of cracks on the outer surface.

The test oil may be heavy hydrotreated naphthebic distillates. Therefore, the test oil is improved in color, odor, oxidative stability, human hazards, etc. through desulfurization, denitrification, deoxygenation, and demetallization by hydrogenation.

The specification related to the oil resistance verification is hydrogenated naphthenic refined oil, and after bending the communication cable in IRM 902 oil after 96 hours at the temperature of 100 ° C, the bending of the communication cable with bending radius of 9 times the outer diameter of the communication cable It can be verified through the IEEE 1580 specification, which requires no cracks on the surface.

Oil-resistant test communication cable is immersed in IRM 902 test oil heated to a high temperature for a long time, and then the communication cable is bent to a predetermined radius of curvature (curvature radius 9 times the outer diameter of the communication cable) to prevent cracking. If it can be confirmed, it can be confirmed that the oil resistance of the test communication cable that may be exposed to oil components is secured to a certain level.

In addition, when a fire or the like occurs in an installation space in which a communication cable is installed, a portion that may be exposed to a flame, and in addition to low flame retardancy, a considerable level of high flame retardancy is required.

Such high flame retardancy can be confirmed by the test of IEC 60332-3.

Specifically, the requirements for high flame retardancy may be required to satisfy the highest rating of IEC 60332-3A, the highest level of flame retardancy according to the Test for flame spread of vertically-mounted bunched wires or cables.

This flame retardancy requirement can be satisfied by the flame retardant reinforcement additionally contained in the second sheath member 700, the oxygen index of the second sheath member 700 is also increased to reduce the possibility of ignition of the communication cable in the event of a fire. have.

The oxygen index (酸素指數) means the minimum concentration (%) of oxygen required for the continuous combustion of the sample ignited in the air mixture of oxygen and nitrogen.

Specifically, the oxygen index of the first sheath member 300 may be about 35%, and the oxygen index of the second sheath member 700 may be 37% or more.

Therefore, both of the first sheath member 300 and the second sheath member 700 are hardly combusted even after being ignited in a general situation, and in particular, the second sheath member 700 exposed to a flame has a higher oxygen index and thus a flame retardancy requirement. Can satisfy

When the flame retardant reinforcement or oil resistant reinforcement is added to the halogen-free low flame retardant, the price of the material can be greatly increased. Therefore, the oil resistant reinforcement or flame retardant reinforcement may be contained only in the second sheath member 700 directly exposed to the foreign matter such as oil or the flame in case of fire, thereby reducing the cost of the communication cable.

In addition, the second sheath member 700 may be crosslinked or naturally crosslinked through a cross linking process of converting a polymer into a new three-dimensional network structure.

The crosslinking process means a water crosslinking process, and the water crosslinking process may be performed through a crosslinking reaction for about 6 hours at a temperature of about 65 ° C. in a chamber supplied with water vapor.

In addition, the natural crosslinking process refers to a process of natural crosslinking using moisture in the air when the second sheath member is exposed to room temperature for a long time.

In addition, the hardness of the second sheath member 700 may be higher than the hardness of the first sheath member 300.

Specifically, the hardness of the first sheath member 300 may be 94.5 to 96.5 based on Shore A durometer, and the hardness of the second sheath member may be 97.5 to 99.5 based on Shore A durometer.

A difference in hardness of the sheath member itself may occur due to a difference in hardness between the resin materials constituting the LSZH of the first sheath member 300 and the second sheath member 700.

Therefore, since the second sheath member 700 surrounds the outside of the communication cable, a feature having a hardness greater than that of the first sheath member 300 is advantageous to sufficiently protect the core constituting the communication cable from an external impact or the like.

FIG. 3 shows a cross-sectional view of one of pairs 10n, n = a, b, c, d of the pairs constituting the core 100 of the communication cable 1000A shown in FIGS. 1 and 2.

The communication cable shown in Figs. 1 and 2 consists of insulated conductor wires of the first to fourth pairs 10a, 10b, 10c and 10d, as described above.

The conductor wires 10n1 and 10n2 constituting each pair 10n are covered with insulating materials 10n3 and 10n4, respectively, and the conductor diameters d of the conductor wires 10n1 and 10n2 are the same.

However, each of the insulated conductor wires 10n1 and 10n2 may have an insulation outer diameter Dn, which is the length between the centers of the conductor wires, depending on the pitch of the conductor wires in a twisted state.

Cat is a common UTP communication cable. In case of 5E and Cat.6 grade UTP communication cable, it satisfies the electrical characteristics of each grade required by international standard.

For example, the specification requires that the communication cable satisfies the characteristic impedance (Zo) of 85 to 115 ohms and the attenuation amount IL of 0 decibels (dB) or more.

In the case of a general UTP communication cable, the thickness and the pitch of the external insulation, etc. are set in consideration of the above standard.

However, since the core of the communication cable according to the present invention is provided with a first sheath member 300, a braiding member 500, and a second sheath member 700, the core 100 of the communication cable has a lower core than that of a general UTP cable. The pressing phenomenon may be larger, and the insulation outer diameter between the conductor wires may be further changed by the pressing phenomenon of the core.

That is, the communication cable according to the present invention further includes a sheath member or a braided member for protecting the layer core 100 in order to achieve a special purpose such as mechanical durability, flame retardancy, oil resistance, etc., which is not provided in the general UTP cable Pressing of the core may be worsened by the same sheath member or the braiding member. Therefore, in order to satisfy the requirements of the electrical characteristics of each communication cable, the conductor diameter of the conductor wire constituting the core and the insulation outer diameter of each pair are separated. Design is required.

First, look at how the electrical characteristics are changed according to the change in conductor diameter and insulation outer diameter of the conductor wire constituting the core 100 is as follows.

When the insulation outer diameter D is increased, the C (capacitance) value of the communication cable, the attenuation amount (margin improvement), and the characteristic impedance value (Zo) are sequentially increased, while the insulation outer diameter (D) is decreased, The C (capacitance) value increases, the attenuation amount increases (margin decrease), and the characteristic impedance value Zo tends to decrease.

When the conductor diameter d is increased, the R (resistance) value is sequentially decreased, the attenuation amount is decreased (margin improvement), and the impedance value is decreased, while when the conductor diameter d is decreased, the R (resistance) is reduced. The value is increased, the attenuation amount is increased (margin is decreased), and the characteristic impedance value Zo is increased.

For example, the characteristic impedance value (Zo) of the communication cable according to the present invention preferably has a range of 100 ± 15 ohms, but in order to construct a communication cable according to the present invention for use in marine facilities, a general UTP In the case of using the conductor wire and the insulating material constituting the core 100 of the communication cable as it is, the aforementioned impedance may not be secured.

That is, since the communication cable for the marine installation according to the present invention wraps the core 100 in several layers, if the same conditions, the insulation outer diameter may be reduced by the external pressure, and may cause a change in electrical properties accompanying it. have.

For example, the insulating outer diameter is influenced by the change of the conductor diameter in addition to the pressing phenomenon of the core by the coating of the multiple layers, and therefore it is necessary to determine experimentally whether or not the specific electrical characteristics are satisfied.

In general, communication cables are characterized in terms of electrical characteristics such as characteristic impedance, propagation delay, delay skew, attenuation, PS NEXT loss, and near-end crosstalk. Pair-to pair Near-End Crosstalk (NEXT) loss, Power Sum-Equal-level Far-End Crosstalk (PS ELFEX) loss, Pair-to pair Equal-level Far-End Crosstalk (ELFEXT) loss, Return loss Loss, etc. should be considered.

The attenuation refers to the amount of signal power loss that occurs when the connection device is inserted on the link. Typically, attenuation is expressed in dB per unit length and measures how weak the magnitude of the signal flowing along the cable is when delivered to the desired location. If a cable has a low damping characteristic, it has better transmission performance than a cable with a high damping characteristic.

In addition, near-end crosstalk refers to the amount of signal power loss generated when one circuit is combined with another circuit in an arbitrary connector. As a measure of the coupling of unnecessary signals generated between pairs of adjacent communication cables, the smaller the signal coupling, the better the performance. The higher the dB value, the less the interference of the signal.

The standard requires 85 ohms (Ω) to 115 ohms (Ω) for 100 m long communication cables for characteristic impedance and 0 decibels (dB) or more for 100 m long communication cables for attenuation.

Table 1 below is a comparison table comparing the conductor diameter and the insulation outer diameter of each of the four pairs of conductor wires constituting the core 100 of the conventional UTP communication cable and the Cat.5e class communication cable according to the present invention.

Each insulation outer diameter and conductor diameter listed in the table below is based on the premise of satisfying the electrical properties generally required for communication cables.

Cat.5e rated UTP communication cable
Cat.5e class communication cable according to the present invention

Conductor diameter (d ')

Insulation Outer Diameter (D ')
Conductor diameter (d)
Insulation Outer Diameter (D)

Cat.5e class

d '

1.800d '
/ 1.780d '
/ 1.760d '
/ 1.740d '

d
(d> d ')

1.880d
/ 1.860d
/ 1.840d
/ 1.820d

As shown in Table 1 above, a general UTP communication cable having four pairs of cores 100 has a conductor diameter d ', and the insulation outer diameters of the first to fourth pairs are approximately equal to each other by a pitch or the like. It may be configured to have an insulation outer diameter of 1.740d ', 1.760d', 1.780d ', 1.800d' size.

That is, in the case of a general UTP communication cable, the ratio of the insulation outer diameter D 'to the conductor diameter d' is about 1.740 to 1.800.

That is, in case of a general UTP communication cable, when the conductor diameter of each conductor wire constituting each pair is the same as d ', the insulation outer diameter D' of each pair has a value smaller than 1.800d 'to satisfy the above-described electrical characteristics. Tend to have.

However, the communication cable according to the present invention, in order to satisfy the above-described electrical characteristics, the conductor diameter (d) must be thicker than the general UTP communication cable (d> d '), the insulation outer diameter (D) for the conductor diameter (d) ) Was found to have a range between 1.820 and 1.880.

Due to the structure surrounding the core 100 in a double layer, the electrical characteristic change (for example, attenuation amount) generated by reducing the insulation outer diameter was solved by increasing both the conductor diameter and the insulation outer diameter.

A general UTP cable includes a plurality of pairs of conductor wires having a predetermined first conductor diameter d1, an insulation material surrounding each conductor wire such that the distance between the centers of the conductor wires constituting each pair has a first insulation outer diameter D1, and the plurality of conductor wires. It consists of a cushioning material (covering material, the first sheath member of the present invention) surrounding the outer conductor wire of the pair, the characteristic impedance (Zo) of its electrical characteristics is 85 ohm to 115 ohm, the attenuation amount is 0 decibel (dB) or more, the communication cable according to the present invention further includes a reinforcing material (braiding member) surrounding the outside of the cushioning material and a sheath material (second sheathing member) surrounding the outside of the reinforcing material, wherein the first conductor diameter d1 And the conductor diameter d and the insulation outer diameter D larger than the first insulation outer diameter D1, it is confirmed that the electrical characteristics required by the communication cables of each grade are satisfied.

In this case, in order to prevent the diameter of the communication cable from becoming too large, the conductor diameter (d) and the insulation outer diameter (D) are preferably selected between 1 and 1.5 times the conductor diameter and the insulation outer diameter of the general UTP cable.

Specifically, the conductor diameter of the Cat.5e grade communication cable according to the present invention is increased by 6% to 7% and the insulation outer diameter is increased by 11% to 12% compared to the conductor diameter of the general UTP cable. In the case of adjusting the thickness of the conductor diameter and the insulating material by adjusting the ratio of the conductor diameter (d) within the range of larger than 1.8 and smaller than 1.9, despite the pressing phenomenon of the core by the sheath member of the multilayer and the braiding member interposed therebetween, It can be seen that the electrical characteristics required for Cat.5e class communication cables are satisfied.

4 is a cutaway perspective view of a communication cable 1000B that satisfies the communication standard of Cat. 6 according to the present invention, and FIG. 5 is a cross-sectional view of the communication cable 1000B according to the present invention shown in FIG.

Cat.6 grade communication cable 1000B according to the present invention shown in Figs. 4 and 5 is a communication cable and communication speed shown in Figs. Overall technical features are common. The explanation focuses on the differences.

A communication cable of Cat.6 rating according to the invention shown in FIGS. 4 and 5 also includes a core 100 comprising a plurality of pairs of conductor wires coated with an insulating material, and a first sheath surrounding the core 100. 1 to 3 in that it comprises a member 300, a wrapping braiding member 500 of the first sheath member 300, the second sheath member 700 wrapping the braiding member 500 is shown in FIGS. It is common with the embodiment.

Cat.6 communication cable according to the present invention shown in Figures 4 and 5, unlike the embodiment shown in Figures 1 to 3, the pair consisting of the respective conductor wires constituting the core 100 spaced apart from each other Spacer 200 may be further provided to.

Figure 6 shows a cross-sectional view of the spacer 200 provided in the communication cable of Cat.6 grade of the communication cable according to the present invention.

The spacer 200 may have a cross-sectional shape of a cross shape. Each pair of conductor wires may be seated in an area defined by a cross section.

The spacer 200 may be provided with a spacer 200 to separate the conductor wire pairs constituting the core 100 even in the case of a general UTP communication cable satisfying Cat.6.

The spacer 200 may be provided to minimize NEXT (near end crosstalk). Near-end crosstalk, which can be deepened when the distance between the pairs constituting the core 100 is reduced, may become more severe as the grade is increased according to a communication speed or frequency. Therefore, in the case of not using the shield means for each pair, a method of increasing the distance between each pair may be used to alleviate near-end crosstalk, and a spacer may be used as a method of increasing the distance between each pair.

In the case of a general UTP communication cable, a Cat.6 grade communication cable may be provided with a spacer 200 to reduce near-end crosstalk.

In the case of the Cat.6 grade communication cable according to the present invention, the width of the spacer 200 needs to be increased compared to the spacer used in the UTP cable of the same grade.

Since the braiding member and the sheath member surround the core 100 in a double layer, the near-end crosstalk due to the pressing phenomenon by the braiding member or the sheath member may become more severe, and the thickness of the spacer 200 needs to be increased. have.

Therefore, it is preferable that the Cat.6 grade spacer 200 of the coastal equipment communication cable according to the present invention has a thickness and a thickness thicker than the Cat.6 grade spacer 200 of the general UTP communication cable.

The width W of the Cat.6 grade spacer 200 of the communication cable according to the present invention shown in FIG. 6 is the width of the spacer 200 of the Cat.6 grade communication cable of the conventional general UTP communication cable ( Wo) is increased by about 10% to 20%, and the thickness t of the spacer 200 of Cat.6 grade of the communication cable according to the present invention is the distance of the Cat.6 grade communication cable of the conventional UTP communication cable. It has been experimentally confirmed that by increasing the thickness of the member 200 by 40% to 60%, it is possible to alleviate near-end crosstalk due to increased conductor diameter, insulation outer diameter and crushing, thereby satisfying the required electrical characteristics. .

Cat 5 grade communication cable 1000B according to the present invention shown in Figures 4 to 5 similarly to the communication cable (1000A) shown in Figures 1 to 3 in consideration of the pressing phenomenon of the core 100, etc. It is desirable to configure the conductor diameter and the insulation outer diameter to be larger.

Cat.6 grade UTP communication cable
Cat.6 communication cable according to the present invention

Conductor diameter (d ''')

Insulation Outer Diameter (D ''')
Conductor diameter (d '')
Insulation Outer Diameter (D '')

Cat.6 class

d '''

1.760d '''/
1.740d '''/
1.720d '''/
1.700d '''

d '' (d ''> d ''')

1.860d '' /
1.840d '' /
1.820d '' /
1.800d ''

As shown in Table 2 above, a common UTP communication cable having 4 pairs of cores and corresponding to Cat.6 grade has a conductor diameter (d '' '), and the first to fourth pairs 10a, The insulating outer diameters D '' 'of 10b, 10c, and 10d) are about 1.700d' '', 1.720d '' ', 1.740d' '', and 1.760d ', respectively, depending on the pitch of the conductor wire constituting each pair. It can be configured to have an insulating outer diameter of '' size.

That is, for a general UTP communication cable having 4 pairs of cores and corresponding to Cat.6, the ratio of the insulation outer diameter (D '' ') to the conductor diameter (d' '') is about 1.700 to 1.760. It can have a size.

That is, in case of a general UTP communication cable having 4 pairs of cores and corresponding to Cat.6 class, the conductor diameter of each pair of conductors constituting each pair is equal to d '' ', In order to satisfy the electrical characteristics, the insulation outer diameter D '' 'of each pair may have a value smaller than 1.760d' ''.

As with the Cat.5e class telecommunication cable according to the present invention described above, in order to satisfy the electrical characteristics of the requirements according to the class, the conductor diameter d '' of Cat.6 telecommunication cable according to the present invention is Cat.6. Should be thicker (d ''> d '' ') than ordinary UTP communication cables of the class and the ratio of the insulation outer diameter (D' ') to the conductor diameter (d' ') ranges from 1.800 to 1.860. It was confirmed.

In the case of the Cat.6 communication cable according to the present invention, the electrical characteristic degradation which may be caused by the reduction of the insulation outer diameter, which may be caused by the crushing of the core, was solved by increasing both the conductor diameter and the insulation outer diameter. .

Similarly, in order to prevent the diameter of Cat.6 communication cable according to the present invention from becoming too large, the conductor diameter (d) and the insulation outer diameter (D) are respectively 1 to 1.5 times the conductor diameter and the insulation outer diameter of the general UTP cable. It is preferable to select between.

Specifically, the conductor diameter (d '') of the Cat.6 grade communication cable according to the present invention increases by 2% to 5%, the insulation outer diameter is increased by 7% to 11%, and further, the insulation outer diameter (D ''). When the conductor diameter and the insulation outer diameter (or the thickness of the insulating material) are adjusted to satisfy the ratio between the conductor diameter (d '') and the range between 1.800 and 1.860, the Cat.6 grade communication cable according to the present invention It was confirmed that the general UTP communication cable satisfies the electrical characteristics.

In summary, as described in the description referring to Tables 1 and 2, a general UTP communication cable corresponding to Cat.5e and Cat.6 grades and a communication cable according to the present invention corresponding to Cat.5e and Cat.6 grades When comparing the cores constituting the communication cable of Cat.5e and Cat.6 grade for coastal equipment, in addition to the structural difference comprising the braiding member and the sheath member provided inside and outside the braiding member ( It can be seen that the ratio of the insulation outer diameter to the conductor diameter of 100) converges in the range of about 1.800 to 1.900.

That is, in order to prevent the electrical characteristics such as near-end crosstalk due to the pressing phenomenon of the core 100 and the like, the ratio of the insulation outer diameter to the conductor diameter of the core 100 constituting the communication cable is cat.5e and cat.6. It was confirmed that problems such as near-end crosstalk can be solved by setting larger than the ratio of general UTP communication cable corresponding to the rating.

Of course, it is possible to solve the electrical characteristics deterioration according to the pressing phenomenon of the core 100 by setting the thickness of the insulating material of the conductor wire to have a ratio of the insulation outer diameter to the conductor diameter larger than the above range, the overall diameter of the communication cable This increase is undesirable because it prevents the efficient use of the installation site and increases the weight and manufacturing cost of the product together. Therefore, the aforementioned method of minimizing the increase in the diameter of the entire communication cable is preferable.

7 is a cut away perspective view of a Cat.7 grade communication cable 1000C in accordance with the present invention, and FIG. 8 is a cross-sectional view of a Cat.7 grade communication cable 1000C in accordance with the present invention.

Cat.7 grade communication cables have a transmission speed of 10 gigabytes per second (10 Gbps) and a frequency band of 600 megahertz (Mhz).

In the case of the Cat.7 grade communication cable according to the present invention, the Cat.7 grade communication cable according to the present invention may be more sensitive to the decrease in electrical characteristics due to the increase in transmission speed and frequency band. There is a limit in mitigating or blocking the deterioration of electrical characteristics by a method of canceling electrical interaction by a spacer provided in a cable.

Therefore, a method of shielding each pair constituting the core 100 of the Cat.7 grade communication cable according to the present invention with an electromagnetic shielding tape can be used.

A communication cable of Cat.7 rating according to the present invention shown in FIGS. 7 and 8 also includes a core 100 including a plurality of pairs of conductor wires coated with an insulating material, and a first sheath member 300 surrounding the core 100. ), The braiding member 500 of the first sheath member 300, the second sheath member 700 surrounding the braiding member 500, the first sheath member 300 and the second sheath The member 700 comprises LSZH (low halogen low flame retardant), and the Cat.5e or Cat.6 grade according to the invention in that the second sheath member 700 comprises an oil resistant reinforcement additive or a flame retardant reinforcement. Is common with the communication cable.

However, Cat 7 grade communication cable according to the present invention shown in Figures 7 and 8 is configured to surround each pair with electromagnetic shielding tape (20a, 20b, 20c, 20d) in place of the spacer. That is, the electromagnetic shielding tapes 20a, 20b, 20c, and 20d use the above-described spacers or control conductor diameter or insulation outer diameter of each pair 10n, n = a, b, c, d. Can be omitted. The electromagnetic shielding tapes 20a, 20b, 20c, and 20d may be aluminum tapes coated with a plastic or resin material.

The plastic or resin coated on the aluminum tape may be in the form of a film.

In addition, the Cat.7 grade communication cable according to the present invention employs a structure in which each pair constituting the core 100 is wrapped with an electromagnetic shielding tape, and thus a core generated due to a problem of wrapping the core 100 in multiple layers. The problem of deterioration of electrical characteristics due to the pressing phenomenon of 100 may not be serious as compared to Cat. 5e or Cat. 6 grade communication cable according to the present invention.

Therefore, the Cat.7 grade communication cable according to the present invention, unlike the Cat.5e or Cat.6 grade communication cable according to the present invention, increases the conductor diameter and the insulation outer diameter of the conductor wire to reduce electrical characteristics such as near-end crosstalk. Since the adjusting method may not be used, an increase in the diameter of the communication cable may be minimized.

In addition, the communication cable of the Cat.7 rating according to the present invention shown in Figures 7 and 8 may further include an auxiliary braiding member 600, unlike the Cat.5e or Cat.6 rating of the communication cable according to the present invention. have.

The auxiliary braiding member 600 may further reinforce the rigidity of the Cat.7 grade communication cable according to the present invention, and may minimize electrical deterioration by alleviating electrical interaction between adjacent communication cables.

The auxiliary braiding member 600 may be made of a tinned copper material, and the braiding ratio of the auxiliary braiding member 600 is preferably 60% or more although there is no value required by the standard.

The braiding member 500 provided between the first sheath member 300 and the second sheath member 700 is made of bronze copper, and the braiding rate required is the auxiliary braiding member 600. May be higher than the rate of braiding. When the braiding rate required by the standard is satisfied, the braiding member 500 and the auxiliary braiding member 600 may be made of the same material.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims. . It is therefore to be understood that the modified embodiments are included in the technical scope of the present invention if they basically include elements of the claims of the present invention.

1000: Communication Cable
10: pair
100: core
300: first sheath member
500: braided member
700: second sheath member

Claims

A core comprising a plurality of pairs of conductor wires covered with an insulating material;
A first sheath member surrounding the core and including a halogen-free low flame retardant material;
A braiding member surrounding the first sheath member;
And a second sheath member surrounding the braided member, the second sheath member including at least one of a halogen-free low flame retardant, an oil resistant reinforcement additive, and a flame retardant reinforcement additive.

The method of claim 1,
The flame-retardant reinforcing additive included in the second sheath member includes an inorganic hydroxide.

The method of claim 1,
The oil-resistant reinforcing additive included in the second sheath member includes a crosslinking catalyst including a tin component, and the content thereof is 1.5 wt% to 3.5 wt%.

The method of claim 3,
The oil resistance of the second sheath member is a crack in the surface of the communication cable when bending with a radius of curvature having nine times the outer diameter of the communication cable after 96 hours at 100 degrees Celsius after immersing the communication cable in a predetermined test oil. Characterized in that the communication cable.

The method of claim 1,
And the oxygen index of the first sheath member is lower than that of the second sheath member.

The method of claim 5,
The oxygen index of the first sheath member is about 35, and the oxygen index of the second sheath member is 37 or more.

The method of claim 2,
And said second sheath member satisfies flame retardancy standards of IEC 60332-3A or higher.

The method of claim 1,
And the hardness of the second sheath member has a hardness greater than that of the first sheath member.

9. The method of claim 8,
The hardness of the first sheath member is 94.5 to 96.5 based on Shore A durometer, the hardness of the second sheath member is 97.5 to 99.5 based on Shore A durometer.

The method of claim 1,
The second sheath member is a communication cable, characterized in that undergoing a cross-linking process or a natural cross-linking process.

The method of claim 10,
The cross-linking process is carried out through a crosslinking reaction for about 6 hours at a temperature of about 65 degrees Celsius in the chamber to which water vapor is supplied.

The method of claim 1,
The communication cable further comprises a spacer having a 'cross' shaped cross section spaced apart from each other a plurality of pairs constituting the core.

The method of claim 1,
And each electromagnetic shielding tape is attached to each of the plurality of pairs constituting the core.

The method of claim 13,
The electromagnetic shielding tape is a communication cable, characterized in that the aluminum tape coated with a plastic or resin material.

The method of claim 13,
A communication cable further comprises an auxiliary braiding member between the core and the first sheath member.

The method of claim 1,
The braiding member is made of bronze copper material, the communication cable, characterized in that the braiding rate of 88% or more.

16. The method of claim 15,
The auxiliary braiding member is made of tinned copper (Tinned copper) material, the braiding rate of the auxiliary braiding member, characterized in that more than 60%.

A plurality of pairs of insulated conductor wires;
A cushioning material provided outside the conductor wire;
Reinforcing material provided on the outside of the buffer;
And a sheath material provided outside the reinforcement material.
Characteristic impedance (Zo) is 85 to 115 ohm (ohm), attenuation amount (IL) has a characteristic of 0 decibel (dB) or more, the sheath material is composed of LSZH (halogen-free low-flammable material) material, oil-resistant reinforcing additives and flame retardant A communication cable further comprising at least one of the reinforcing additives.

19. The method of claim 18,
The conductor wire is covered with an insulating material and has a predetermined conductor diameter (d), wherein the insulation outer diameter (D) and the conductor diameter (d), which are the distance between the centers of the conductor wires constituting each pair, are 1.8 <insulation outer diameter (D). ) / Conductor diameter (d) <1.9.

A plurality of pairs of conductor wires having a predetermined first conductor diameter d1, an insulating material surrounding each conductor wire such that the distance between the centers of the conductor wires constituting each pair has a first insulating outer diameter D1, and the conductor wires of the plurality of pairs When the characteristic impedance (Zo) of a communication cable including an external shock absorbing material has an ohm in the range of 85 to 115, and the attenuation amount is more than 0 decibel (dB),
And a sheath material surrounding the outside of the cushioning material and a sheath material surrounding the outside of the reinforcing material. Communication cable.

21. The method of claim 20,
Wherein the conductor diameter (d) and the insulation outer diameter (D) have a value of 1.00 to 1.50 times the first conductor diameter (d1) and the first insulation outer diameter (D1).

21. The method of claim 20,
The first thickness t1 of the shock absorbing material of the communication cable having the conductor wire having the first conductor diameter d1 is smaller than the thickness t of the shock absorbing material of the communication cable having the conductor diameter d. Communication cable.

The method of claim 22,
The thickness t is a communication cable, characterized in that having a value of 1.20 times to 3 times the first thickness (t1).

The method of claim 21,
Insulation outer diameter (D), which is the distance between the centers of the conductor wires constituting each pair, and the conductor diameter (d) have a relationship of 1.8 <insulation outer diameter (D) / conductor diameter (d) <1.9 cable.

21. The method of claim 20,
The reinforcing material is composed of a metallic braiding member, the braiding rate of the reinforcing material is a communication cable, characterized in that more than 88%.

21. The method of claim 20,
The sheath material is a communication cable comprising a flame-retardant reinforcement containing an oil-resistant reinforcement containing a crosslinking catalyst containing a tin component or an inorganic hydroxide.

21. The method of claim 20,
The hardness of the sheath material has a hardness greater than that of the buffer material, and after infiltrating the communication cable with a predetermined test oil, after bending 96 hours at a temperature of 100 ° C, the bending of the communication cable with a radius of curvature having 9 times the outer diameter of the communication cable. Communication cable, characterized in that the crack does not occur on the surface.

28. The method of claim 27,
The test oil is a communication cable, characterized in that the hydrogenated naphthenic-based refined oil.

21. The method of claim 20,
The oxygen index of the buffer material is lower than the oxygen index of the sheath material, and the flame retardancy of the sheath material is characterized in that the communication satisfies the standard of IEC 60332-3A or higher.