KR20160054103A - fiber braided cable - Google Patents

Abstract

Disclosed is a fiber braided cable. The fiber braided cable prevents shielding performance degradation generated with low conductivity in case of applying a fiber braided reinforcing layer to a signal / control cable. The fiber braided cable is provided to maintain a shielding effect over a certain level, and include flexibility in order not to exceed a bending radius over the certain level with the excellent shielding effect, thereby improving workability in pulling work. The fiber braided cable is provided to prevent a signal interference phenomenon caused by decreasing a shielding performance, thereby securing the reliability of the cable. The fiber braided cable is provided to decrease the total weight of the cable, thereby easily transferring and installing the cable.

Description

Fiber braided cable}

The present invention relates to a fiber-reinforced cable for a cable, more particularly, to an excellent shielding performance and a bending radius which is kept below a predetermined value to satisfy flexibility, To a fiber braided cable capable of improving workability.

Generally, there are cables that require a certain level of mechanical tensile strength, while delivering signals and / or power depending on usage and usage conditions, such as marine or marine cables.

Specifically, there is a case where tension is exerted from the outside in the direction of tensile force in the operation of the installation or the product depending on the use in the electric / telecommunication cable product. In the absence of the reinforcing layer for such a tensile force, Etc. may be damaged and the function of the cable may be lost.

In addition, since the signal / control cable among the above cables is sensitive to electromagnetic waves, a shielding effect of a certain level or more is required. In order to reinforce the tensile strength and secure the shielding effect, conventionally, a metal wire or a metal braided shield layer is applied.

However, when a metal reinforcement is used to reinforce the mechanical and electrical properties of the cable, the weight of the cable is increased and the flexibility is lowered, so that the workability at the time of laying down may be lowered, and in some cases, the cable may be damaged. That is, when the metal reinforcing material of the cable is used, the weight of the cable is increased and the flexibility is lowered.

In order to compensate for the disadvantages of such metal reinforcements, recently, a technique of applying a lightweight and flexible fiber reinforced material with excellent mechanical properties to a cable has been widely known. Can be produced. Here, the fiber reinforcing layer is applied in the form of a spiral wound in one direction or a braid arranged in a knot in both directions.

However, when the fiber reinforcing material is used as the shielding layer, the shielding layer has a lower conductivity than the metal reinforcement layer, thereby lowering the shielding effect. Actually, when using the fiber shielding layer, the shielding effect is reduced by 30dB on average compared to the metal shielding layer.

In this case, it is necessary to compensate the shielding effect because it is difficult to apply to the signal / control cable due to the signal interference due to the deterioration of the shielding effect. In particular, the cable for the ship is required to have a bending radius of 6D or less according to IEC 60092-352 It is necessary to secure sufficient flexibility in order to satisfy the above specifications.

Also, since the braiding density is determined through the design structure of the braided layer, the shielding effect is increased when the braided density is increased, but the flexibility is lowered. Therefore, when the braided density is increased beyond a certain level, And the problem of failing to satisfy the cable standard should be considered.

Accordingly, there is a need for a fiber braided cable capable of solving the above-mentioned problems, satisfying the shielding effect and flexibility at the same time, and improving the workability of cable installation and installation by lowering the total weight.

Embodiments of the present invention are intended to prevent shielding performance deterioration that may occur due to low conductivity when a fiber braiding reinforcement layer is applied to a signal / control cable and to maintain a shielding effect of a certain level or more.

In addition, with an excellent shielding effect, flexibility is ensured such that the bending radius does not exceed a certain value, thereby improving workability at the time of laying.

Further, it is intended to secure the reliability of the cable by preventing the occurrence of signal interference due to the shielding performance.

It is also intended to facilitate the transport and installation of the cable by reducing the overall weight of the cable.

According to an aspect of the present invention, there is provided a semiconductor device comprising at least one conductor layer, an insulating layer for insulating the conductor layer, and a fiber reinforcing layer at least one layer for reinforcing strength outside the insulating layer, Wherein a plurality of bundles of fibers made of at least one or more strands coated with a conductive material are braided, and the braiding density of the fiber reinforcing layer is 80% to 93.2%.

The conductive material coating may be performed through Ni-Cu plating.

The flake of the fiber reinforcing layer may have a value between 20 and 59 degrees.

The fibers may be made of any one of Polyamide, Polyarylate, UHMW-PE (Ultra High Molecular Weight Polyethylene), or a mixture of two or more thereof.

The fibers may be made of a fineness of 500 Denier to 2000 Denier.

The fiber braided cable according to the present invention may further comprise an inner sheath layer provided to protect the conductor layer and the insulating layer.

The fiber reinforcing layer may be formed outside the inner sheath layer.

The fiber braided cable according to the present invention may further comprise an outer sheath layer formed outside the fiber reinforced layer.

The Ni-Cu plating is performed by an electroless plating method, and Ni plating may be performed to prevent oxidation of Cu after the first plating of Cu.

After the Ni-Cu plating, a UV cured coating can be made.

The embodiments of the present invention can prevent the deterioration of the shielding performance that may occur due to the low conductivity when the fiber braiding reinforcement layer is applied to the signal / control cable and maintain the shielding effect of a certain level or more.

In addition, the excellent shielding effect and flexibility can be ensured such that the bending radius does not exceed a certain value, thereby improving workability at the time of laying.

In addition, shielding performance is lowered, and signal interference is prevented from occurring, thereby ensuring reliability of the cable.

Further, by reducing the total weight of the cable, it is possible to facilitate the transportation and installation of the cable.

1 is a cross-sectional view of a cable according to an embodiment of the present invention;
Figure 2 is a cutaway perspective view of a cable in accordance with an embodiment of the present invention.
3 is a plan view showing a structure of a fiber reinforcing layer of a cable according to an embodiment of the present invention.
4 is a graph comparing shielding performance of a fiber reinforced layer of a cable with a conventional braided structure according to an embodiment of the present invention.
5 is a graph showing the bending radius and shielding effect of the fiber reinforcing layer of the cable according to the embodiment of the present invention,

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 the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals designate like elements throughout the specification.

FIG. 1 is a cross-sectional view of a cable according to an embodiment of the present invention, FIG. 2 is a cutaway perspective view of a cable according to an embodiment of the present invention, FIG. 3 is a cross- Fig. FIG. 4 is a graph comparing shielding performance of a fiber reinforcing layer of a cable according to an embodiment of the present invention and a conventional braiding structure, FIG. 5 is a graph showing a bending radius and a shielding strength of a cable according to an embodiment of the present invention, FIG.

1 to 5, a cable 1000 according to an exemplary embodiment of the present invention includes at least one conductor layer 112, an insulating layer 116 for insulating the conductor layer 112, And a fiber-reinforced layer 140 formed on at least one side of the insulating layer 116 for reinforcement of strength.

The conductor layer 112 may be formed of a stranded wire 20 made of any one of copper, aluminum, aluminum alloy, and copper wire, and may be twisted, gathered, or combined.

A separator tape 114 may be provided on the outer side of the conductor layer 112 to surround the conductor layer 112. The separator tape 114 is not essential and can be omitted especially when the conductor layer 112 is made of fine wires.

When the separate tape 114 is provided, the insulating layer 116 may be extruded to surround the separate tape 114. The insulating layer 116 is made of a material having an insulating property and an impact resistance property, and covers and protects and insulates the conductive layer 112.

Specifically, the insulating layer 116 may be formed of a material selected from the group consisting of silicone, cross-linked polyethylene (XLPE), crosslinked polyolefin (XLPO), ethylene-propylene rubber (EPR) Polyvinyl chloride (PVC), or a mixture thereof.

The conductor layer 112, the separate tape 114 and the insulating layer 116 form one core 110. The three cores 110, as in the cable 1000 shown in FIGS. 1 and 2, And the number may vary depending on the field to which the cable 1000 is applied, the use environment, the use, and the like.

A filler 122 is filled between the plurality of cores 110 to maintain a circular shape and a binder tape 124 surrounding the plurality of cores 110 and the periphery of the filler 122 may be provided on the outer side thereof. have. The plurality of cores 110, the filler 122, and the binder tape 124 constitute the core portion 120.

The filler 122 functions to prevent circular penetration and gas penetration of the core 120, and is preferably made of a non-hygroscopic material.

The binder tape 124 is mainly made of a PET material but is not limited thereto. The binder tape 124 serves as a core fixing member fixing the shape at the outermost part of the core part 120.

The inner sheath layer 130 may be provided on the outer side of the core 120. The inner sheath layer 130 may be used for the purpose of protecting the inner conductor layer 112 by absorbing an external impact, and may be used for the purpose of flame retardation or the like, but is not essential and may be omitted.

As the inner sheath layer 130, thermoplastic and thermosetting materials such as PVC, HF4-1, SHF1, and chloroprene can be used.

If the inner sheath layer 130 is omitted, the outer side of the core part 120, that is, the outer side of the semi-finished product or the insulating layer 116, is wrapped around the inner sheath layer 130 A fiber-reinforced layer 140 may be provided.

The outer sheath layer 150 is provided on the outer side of the fiber reinforcing layer 140, that is, the outermost portion of the cable 1000, to protect the cable 1000 from external impact or corrosion. Like the inner sheath layer 130, the outer sheath layer 150 can be made of thermoplastic or thermosetting materials such as PVC, HF4-1, SHF1, and chloroprene. The outer sheath layer 150 is also not essential and may be omitted.

In the present embodiment, the fiber-reinforced layer 140 can be applied in the form of a knot, that is, a braided shape, which is inclined at a certain angle in both directions with respect to the axial direction of the cable 1000. However, the present invention is not limited thereto. For example, it is also possible to apply a plurality of warp yarns arranged parallel to a certain distance on the basis of the central axis, and a weft yarn winding having a certain angle with the warp yarns and winding them along the circumferential direction.

The fibers used as the fiber reinforcing layer 140 may be one strand or two strands having a fineness of 500 to 2000 Deneri. Where 1Denier is the unit of fineness with 1g when stretched 9000m.

The fibers constituting the fiber reinforcing layer 140 may be made of any one of polyamide, polyarylate or UHMW-PE (Ultra High Molecular Weight Polyethylen) or a mixture of two or more thereof. The fibers may have a tensile strength of 2.5 to 4Gpa and an elastic modulus of 70 It is preferable to use a fiber material of ~ 130 Gpa.

The surface of the fiber forming the fiber reinforcing layer 140 may be coated with a conductive material. Specifically, the conductive material may be coated by Ni-Cu plating to have a maximum electrical resistance of 10 ^-1 Ω or less .

That is, the fibers used in the braiding or fiber-reinforced layer 140 of the present invention should satisfy a maximum electrical resistance of 10 < ^-1 > OMEGA. To this end, in the present invention, electroless plating and UV- Thereby reducing the resistance. In the case of electroless plating, primary Cu is plated, and then Ni is plated to prevent oxidation of Cu. Thereafter, a metal coating is completed on the fiber surface with a UV cured coating.

As described above, when Ni-Cu plating is applied to the surface of the fibers constituting the fiber reinforcing layer 140 according to an embodiment of the present invention, the problem of the shielding effect being reduced when the conventional simple fiber shielding layer is used can be solved.

According to the general standard, shielding performance of 40 dB or more is required for the signal / control cable. As shown in FIG. 4, it can be confirmed that the general fiber shielding layer is less than 40 dB in almost all frequency regions, and the shielding performance is insufficient.

On the other hand, the fiber-reinforced layer 140 to which the conductive material-coated fiber is applied by the Ni-Cu plating according to the present invention exhibits a shielding effect equal to or better than that of the conventional metal shielding layer, .

The structure of the fiber reinforcing layer 140 is such that fibers of N fibers are added together and twisted C yarns at a certain angle. Here, N is the exponent, C is the sum of C, and a certain angle is called a piece.

On the other hand, the relative ratio of the braided layer, that is, the relative ratio of the fiber reinforcing layer 140 covering the braided lower structure in the present invention, is referred to as a braiding density (Kc), and the braiding density (Kc) can be calculated by the following expression.

N: Index C: Number of strokes d: Small diameter Dm: Lower braiding (inner braiding)

P: pitch

FIG. 5 shows the results of measurement of the shielding performance and the change of the bending radius according to the braiding density of the braided and circular knitted fabric knitted with the aramide fibers of the same fineness. As the braiding density increases, the shielding performance increases. At the same time, .

The shielding performance of 40 dB or more is required for use as a signal / control cable, while the upper limit of the bending radius is required to be 6 D. Therefore, it is necessary to determine the braiding density of the fiber reinforcing layer 140 considering these considerations.

Item Case  One Case  2 Case  3

Configuration Conductor 3CX1.5SQ 3CX1.5SQ 3CX1.5SQ Isolation ETFE ETFE ETFE Inner sheath TPU TPU TPU Fiber reinforced layer Cu braiding Ni-Cu Coated Aramid Fiber Braided Pure Aramid Fiber Braided Outer sheath TPU TPU TPU
Shielding layer
rescue Small diameter (mm) 0.13 0.11 0.11 Index () 8 8 8 Dash (dog) 16 24 24 Piece (°) 28.47 35 35 Braiding density (%) 65.3 80.1 80.1 Shielding layer
evaluation Weight (kg / km) 25.351 3.29 3.29 Bending radius 8 4.96 4.96 Shielding performance (50MHz) 43.01 dB 42.91 dB 19.82 dB

Table 1 shows the results of evaluating the mechanical performance and the shielding performance of the cable according to the change of the material and structure of the shielding layer for the cable of the same structure. In the case of mechanical performance, a product using a fiber reinforced layer as a shielding layer has an effect of reducing the shielding layer weight by 80% and reducing the bending radius by the 3D outer diameter as compared with the conventional metal shielding layer.

On the other hand, in the case of the shielding performance, the shielding performance difference occurs depending on the presence or absence of the metal coating of the fiber reinforcing layer, unlike the mechanical performance. The shielding performance of the ordinary aramid fiber of Case 3 is 19.82 dB at 50 MHz, which is significantly lower than that of the conventional metal shielding layer of 43.01 dB.

On the other hand, in the case of the fiber-reinforced layer 140 coated with the conductive material according to the present invention, the difference from the conventional metal shielding layer shows equivalent shielding performance within 1 dB. As a result of measuring the shielding performance in the frequency band of 10 kHz to 200 MHz, the fiber-reinforced layer 140 coated with the conductive material according to the present invention can be used as a conventional fiber- Which is similar to or superior to the metal shielding layer of FIG.

Braiding density (%) 70 75 80 85 90 93.2 95 Shielding layer
rescue Small diameter (mm) 0.11 0.11 0.11 0.11 0.11 0.11 0.11 Index () 7 8 8 8 8 8 8 Dash (dog) 24 24 24 24 24 24 24 Piece (°) 27 24 35 41.5 47 51.7 54 Shielding layer
evaluation Bending radius (D) 4.03 4.54 4.96 5.02 5.36 5.91 6.03 Shielding performance (dB) 36.39 39.24 43.83 42.77 45.00 45.12 44.82

Table 2 shows the results of evaluating the bending radius and shielding performance according to the specific structure of the fiber reinforcing layer 140 according to the present invention. As shown in Table 2, as the braid density increases, the shielding performance increases, but exceeds 80%, which exceeds the shielding performance reference of 40dB.

On the other hand, in the case of the bending radius, the braiding density has a value smaller than 6D up to 93.2%, but it has flexibility exceeding the specification, exceeding the braiding density of 95% and not less than 6. Therefore, the fiber reinforcing layer 140 according to the present invention preferably has a braid density of 80 to 93.2% in order to satisfy both the shielding performance and the flexibility requirement.

Shielding layer
rescue Small diameter (mm) 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 Index () 5 6 7 8 9 10 11 12 Dash (dog) 24 24 24 24 24 24 24 24 Piece (°) 59 52 45 35 20 20 20 20 Braiding density (%) 80 80.6 80.6 80.6 80 84.7 89.1 92.7

Table 3 shows the results of calculating the change of the piece (?) According to the index change under the same knitting density. The index was changed between 5 and 12, which is mainly used. As a result of calculation, the piece size (α) decreases as the index increases with the number of teeth fixed at 24 and the braid density at 80%. When the index has an index of 10 or more, the braid density is 84.7%, which is more than 80% even at the minimum slice (?) Of 20 degrees.

Shielding layer
rescue Small diameter (mm) 0.11 0.11 0.11 Index () 8 8 8 Dash (dog) 16 24 36 Piece (°) 57 35 20 Braiding density (%) 80.6 80.6 92.7

Table 4 shows the results of calculating the change of flakes according to the change of the flats under the same braiding density. The bats were changed to 16, 24, and 36 mainly used. The index piece is fixed at 8, and the braid density is fixed at 80%. When the number of teeth is 36, the knitting density is 92.7% even at the minimum slice (?) Of 20 degrees, which exceeds 80%.

Therefore, as shown in Tables 3 and 4, the braid density can be maintained between 80% and 93.2% as described above by determining the flake (?) Within the range of 20 degrees to 59 degrees, .

The fiber braided cable 1000 according to the embodiments of the present invention described above can prevent deterioration in shielding performance that may occur due to low conductivity when a fiber braiding reinforcement layer is applied to a signal / control cable, And it is possible to improve the workability at the time of laying by securing the flexibility so that the bending radius does not exceed a certain value with excellent shielding effect.

Further, it is possible to secure the reliability of the cable by preventing the occurrence of the signal interference phenomenon due to the low shielding performance, and it is possible to facilitate the transportation and installation of the cable by reducing the total weight of the cable.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. You can do it. 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.

20: wire 110: core
112: conductor layer 114: separate tape
116 insulating layer 120 core portion
122: Filler 124: Binder tape
130: Inner sheath layer 140: Fiber reinforcing layer
150: outer sheath layer

Claims (10)

At least one conductor layer;
An insulating layer for insulating the conductor layer; And
And a fiber reinforcing layer provided on at least one side of the insulating layer for reinforcement of strength,
Wherein the fiber reinforcing layer is formed by braiding a plurality of fibers of at least one or more fibers to which a conductive material coating is applied, and the braiding density of the fiber reinforcing layer is 80% to 93.2%. The method according to claim 1,
Wherein the conductive material coating is performed by Ni-Cu plating. The method according to claim 1,
Wherein the flake of the fiber reinforcing layer has a value between 20 degrees and 59 degrees. The method according to claim 1,
Wherein the fiber is made of a material selected from the group consisting of Polyamide, Polyarylate, and UHMW-PE (Ultra High Molecular Weight Polyethylene), or a mixture of two or more materials. 5. The method of claim 4,
Wherein the fibers are made of a fineness of 500 Denier to 2000 Denier. 6. The method according to any one of claims 1 to 5,
And an inner sheath layer provided to protect the conductor layer and the insulating layer. The method according to claim 6,
Wherein the fiber reinforcing layer is formed outside the inner sheath layer. 8. The method of claim 7,
And an outer sheath layer formed outside the fiber reinforcing layer. 3. The method of claim 2,
Wherein the Ni-Cu plating is performed by an electroless plating method, and Ni is plated to prevent oxidation of Cu after the first plating of Cu.
10. The method of claim 9,
Wherein the Ni-Cu plating is followed by a UV curing coating.

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