KR20200063040A - Carbon Fiber Braid Member And Carbon Fiber Heat Shrinkable Tube - Google Patents

Abstract

The present invention relates to a carbon fiber braided member and a carbon fiber heat shrinkable tube which can provide good shielding performance, since a carbon fiber bundle composed of carbon fiber yarn is disposed in the first direction or the longitudinal direction, and a shrinkable member capable of heat shrinking in the second or circumferential direction is disposed.

Description

Carbon fiber braid member and carbon fiber heat shrinkable tube

The present invention relates to a carbon fiber braided member and a carbon fiber heat shrink tube. More specifically, in the present invention, a carbon fiber bundle composed of carbon fiber yarns is disposed in a first direction or a longitudinal direction, and a shrinking member capable of heat shrinking is disposed in a second direction or a circumferential direction, thereby reducing weight to provide good shielding performance. Carbon fiber braided member and carbon fiber heat shrinkable tube.

Carbon fiber has only a quarter of its mass compared to iron, but its strength and elasticity are 10 times and 7 times, respectively, and thus, it has been tried in various fields.

In addition, a general heat shrink tube is a connection finishing material, and is used as a finishing material that shrinks when heat is applied, such as in a wire connection area. However, the heat-shrinkable tube made of a flexible resin material is difficult to secure sufficient rigidity and is easily torn.

In addition, a shielding layer of a metal braided material is often provided for EMI shielding of a communication cable.

In the case of interconnecting such communication cables, in order to connect the metal braided shielding layer, similarly, the metal braided shielding member is wrapped around the connection portions of both communication cables, and then the metal braided shielding member and the shielding layers of both communication cables are welded respectively. As a method, the shielding layers of both communication cables are electrically connected to minimize electromagnetic leakage through the connection portions of both communication cables.

However, the method of welding the braided shielding member of the metallic material and the shielding layer of both communication cables, respectively, has poor workability and may hinder cable weighting.

In the present invention, a carbon fiber bundle composed of carbon fiber yarns is disposed in a first direction or a longitudinal direction, and a shrinkable member capable of heat shrinking is disposed in a second direction or a circumferential direction, thereby providing a lightweight carbon fiber braid that can provide good shielding performance. An object to be solved is to provide a member and a carbon fiber heat-shrinkable tube.

In order to solve the above problems, the present invention is a plurality of carbon fiber bundles disposed in the longitudinal direction; And, a plurality of shrinking members arranged in a circumferential direction, wherein the shrinking members are spaced apart from each other along the longitudinal direction, and the braided member formed by braiding the carbon fiber bundle and the shrinking member is wound in a cylindrical shape. It is possible to provide a formed carbon fiber heat shrink tube.

In addition, the shrinking member may be made of a polyolefin-based resin material wire.

In addition, the shrinking member may be provided with an average of 17 to 41 per unit length (inch) in the longitudinal direction of the carbon fiber heat shrink tube.

Here, the shrinking member may have a diameter of 0.25 millimeters (mm) to 0.3 millimeters (mm).

In this case, a plurality of the shrinking members are disposed adjacent to each other to form one shrinking portion, and the plurality of shrinking portions may be spaced apart along the longitudinal direction of the carbon fiber heat shrink tube.

In addition, the plurality of shrink members constituting the shrink portion may be arranged side by side in a direction perpendicular to the longitudinal direction of the carbon fiber heat shrink tube.

In addition, two of the shrinking members may constitute one shrinking portion.

Here, the outer diameter (d) of the cable inserted into the carbon fiber heat shrink tube and the maximum contracted outer diameter (D') of the carbon fiber heat shrink tube may satisfy Equation 1 below.

[Equation 1]

54% ≤ D'/d * 100% ≤ 98%

In this case, the carbon fiber heat shrink tube may have a maximum shrinkage of 40% to 60% of the outer diameter.

In addition, the carbon fiber bundle is composed of 3k strand, 6k strand or 12k strand carbon fiber yarn, and the carbon fiber yarn may be polyamide coated.

Further, the carbon fiber yarn constituting the carbon fiber bundle may be a PAN-based carbon fiber yarn having an elongation of 1% or more.

Further, at least one carbon fiber bundle among the plurality of carbon fiber bundles may be metal plated.

Here, some carbon fiber yarns constituting at least one carbon fiber bundle among the plurality of carbon fiber bundles may be metal plated.

In this case, the metal plating material of the carbon fiber may be copper, gold, silver, aluminum or nickel or an alloy material thereof.

Further, the plating density of the metal plating of the carbon fiber bundle may be 2.7 g/cm3 or less.

In addition, in order to solve the above problems, the present invention is a plurality of carbon fiber bundles disposed in a first direction; And a plurality of shrink members disposed in a second direction perpendicular to the first direction; and a carbon fiber braid member configured by braiding the carbon fiber bundle and the shrink member.

Here, the shrinking member is composed of a wire made of polyolefin, and the shrinking member is arranged adjacently to form one shrinking part, and the plurality of shrinking parts are spaced apart in the first direction to be arranged in the second direction. Can be.

In this case, a plurality of shrinking members constituting the shrinking portion may be arranged in a single layer.

In addition, the shrinking member is a polyolefin-based resin material wire, the diameter is 0.25 millimeter (mm) to 0.3 millimeter (mm), and two may constitute one shrinking portion.

In addition, the shrinking member may be provided with an average of 17 to 41 per unit length (inch) in the first direction.

Here, the carbon fiber bundle is composed of 3k strand, 6k strand or 12k strand carbon fiber yarn, and the carbon fiber yarn may be polyamide coated.

In this case, the carbon fiber yarns constituting the carbon fiber bundle may be PAN-based carbon fiber yarns having an elongation of 1% or more.

In addition, some carbon fiber yarns of the carbon fibers constituting at least one carbon fiber bundle among the plurality of carbon fiber bundles or at least one carbon fiber bundle among the plurality of carbon fiber bundles may be metal plated.

According to the present invention, a carbon fiber bundle composed of carbon fiber yarns in a first direction or a longitudinal direction is disposed, and a shrinkable member capable of heat shrinking in a second direction or a circumferential direction is disposed, and a lightweight braided member providing good shielding performance and It is possible to provide a heat-shrinkable tube using this.

Therefore, the braided member according to the present invention and the heat-shrinkable tube using the same can be utilized as a non-metallic connection material or a finishing material by providing both the advantages of the metal braided member and the shrinking tube.

In addition, it is possible to minimize the amount of the shrinkage member while ensuring shielding performance by adjusting the spacing or density of the shrinkage members arranged in the second or circumferential direction of the carbon fiber braided member and the carbon fiber heat shrink tube according to the present invention.

Furthermore, the carbon fiber yarns constituting the carbon fiber bundle constituting the carbon fiber braided member and the carbon fiber heat-shrinkable tube according to the present invention can be metal coated to further improve the shielding performance of the heat-shrinkable tube.

In addition, according to the carbon fiber braided member and the carbon fiber heat-shrinkable tube according to the present invention, when used as a cable connection finishing material, a process such as welding is not required, thereby improving workability and reducing weight and reducing costs. .

1 shows a braided member for constructing a carbon fiber heat shrink tube according to the present invention.
Figure 2 shows a perspective view of a carbon fiber heat-shrinkable tube manufactured in the form of a tube braided member shown in Figure 1;
Figure 3 shows a state in which a portion of the carbon fiber heat-shrinkable tube according to the present invention is heat-shrinked to the maximum.
4 to 12 show a graph of the result of the shielding rate according to the ratio of the outer diameter of the contracted tube compared to the cable.
13 shows a cross-sectional view of a carbon fiber braided member or carbon fiber heat shrink tube according to the present invention.
14 to 22 show the test results of the electromagnetic shielding rate according to the number of shrink members disposed per inch constituting the carbon fiber heat-shrinkable tube according to the present invention.
23 shows another embodiment of a carbon fiber heat shrink tube according to 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 and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed contents are thorough and complete, and that the spirit of the present invention is sufficiently conveyed to those skilled in the art. Throughout the specification, the same reference numbers refer to the same components.

1 shows a braided member for constituting a carbon fiber heat-shrinkable tube according to the present invention, and FIG. 2 shows a perspective view of a carbon fiber heat-shrinkable tube made of the braided member shown in FIG. 1 in the form of a tube.

Specifically, FIG. 1 shows a braided member 100' consisting of a plurality of carbon fiber bundles 10 and a plurality of shrinking portions 20, and FIG. 2 is a perspective view of a heat shrink tube composed of the braided member 100'. It shows.

The carbon fiber braided member 100' and the carbon fiber heat shrink tube 100 according to the present invention include a plurality of carbon fiber bundles 10 arranged in a first direction or a longitudinal direction of the heat shrink tube, and a product perpendicular to the first direction. It may be configured to include a plurality of shrinking members 21 or shrinking portions 20 disposed in the circumferential direction of the two-way or heat-shrinkable tube.

Here,'bundle' refers to a bundle or bundle of fibers composed of a number of fine fiber yarns, and in the case of carbon fibers, thousands of fine carbon fiber yarns make up a bundle.

In general, the carbon fiber bundle 10 may be a bundle composed of 1k or more strands of 3k strand, 6k strand, or 12k strand of carbon fiber yarn 11.

In addition, the carbon fiber yarn is preferably a PAN-based carbon fiber yarn having an elongation of 1% or more.

And, each carbon fiber yarn is polyamide (Polyamide) coating is performed in the manufacturing process, it is effective to prevent sticking or entanglement between the carbon fiber yarns. The polyamide coating layer forms a film having good adhesion to the carbon fiber surface and good warpage.

The heat-shrinkable tube has a feature that wraps the finished object with a property of contracting in a radial direction when heat is applied. However, when the shrinkage in the longitudinal direction of the heat-shrinkable tube is severe, the longitudinal shrinkage of the heat-shrinkable tube may not be desirable because it does not sufficiently cover the finish object.

The carbon fiber braided member 100' and the carbon fiber heat-shrinkable tube 100 according to the present invention are manufactured in a braided structure and have a carbon fiber as a basic configuration. The carbon fiber itself is a material having light weight, rigidity and elasticity, and has electromagnetic wave shielding performance, but has no heat shrinking property, so the carbon fiber heat shrink tube 100 of the present invention is not composed of only carbon fiber and is a shrinking member in a direction requiring shrinkage. (21) Or by applying the shrinking portion 20, while utilizing the light weight and shielding performance of the advantages of the carbon fiber can be given a physical heat shrinking characteristics.

The carbon fiber braided member 100 ′ according to the present invention shown in FIG. 1 includes a carbon fiber bundle 10 in one direction (first direction) and a shrinking member 21 or shrinking portion (in the vertical direction (second direction)) 20) can be organized in a braided fashion to form a braided structure.

As an example of the shrinking member 21, a polyolefine-based resin wire may be used.

Polyolefin is a kind of synthetic resin, and refers to an organic material produced by addition polymerization reaction of olefins such as ethylene and propylene (hydrocarbons containing one double bond per molecule).

Polyolefin fiber materials include polyethylene (HDPE (High Density Polyethylene), LDPE (Low Density Polyethylene), LLDPE (Linear Low Density Polyethylene), EVA (ethylene-vinylacetate copolymer), UHMWPE (ultra-high molecular weight PE), etc. Various polypropylene (PP, polypropylene), rubber/elastomer (EPR (ethylene-propylene rubber), EPDM (ethylene-propylene-diene monomer), POE (polyolefin elastomer, ethylene/octene-1)) There is applicability.

Polyolefin wire is generally elastic, insoluble in most organic solvents, resistant to acids and bases, electrically insulating, and used as a material for general heat shrink tubes.

The shrinking member 21 in the form of a polyolefin wire made of such a polyolefin material can be arranged in one unit as well as a second perpendicular to the first direction in units of shrinking units 20 in which a plurality of shrinking members 21 are gathered. Can be placed in any direction.

The shrinking portion 20 may be disposed adjacent to the plurality of shrinking members 21 so as to be parallel in the first direction along the second direction.

In addition, in order to reduce the weight or reduce the cost, the shrinking member 21 is preferably disposed in a single layer.

In the embodiment shown in Figures 1 and 2, the shrinking member 21 constituting the shrinking portion 20 is shown in two, each of the shrinking portion is a predetermined distance in the first direction or in the longitudinal direction of the heat shrink tube It is arranged to be spaced apart, but the number can be increased or decreased (one or three or more). In the case where one shrinking portion 20 is composed of one shrinking member, the braided structure may be configured by spacing one shrinking member 21 at a predetermined interval. The diameter of the shrinking member may be 0.25 mm (mm) to 0.3 mm (mm).

The carbon fiber bundle 10 is formed of strands of 1k or more, and the thickness of the braid member 100' may range from 0.3 millimeters (mm) to 5 millimeters (mm). Preferably, the carbon fiber bundle 10 may be applied with 3k strand, 6k strand or 12k carbon fiber yarn 11.

The braided member 100 ′ constructed as shown in FIG. 1 may be sewn or bonded to the length and diameter of the heat shrink tube to form the carbon fiber heat shrink tube 100 as shown in FIG. 2.

The method of constructing the heat-shrinkable tube 100 with the braided member 100' includes bonding the both ends of the two braided members 100' in the longitudinal direction, in addition to the method of rolling or sewing one braided member in the form of a tube. Alternatively, a method of sewing is also applicable.

In this way, the carbon fiber bundle 10 is disposed in the longitudinal direction of the heat shrinkable tube composed of sewing or bonding, and the shrinkage portion 20 composed of the polyolefin wire is arranged in the circumferential direction of the heat shrinkable tube. have.

FIG. 3 shows a state in which a portion of the carbon fiber braided member 100 ′ and the carbon fiber heat shrink tube 100 is heat-shrinked to the maximum.

Since the carbon fiber bundle 10 made of carbon fiber yarn 11 is applied in the longitudinal direction of the heat shrinkable tube and the shrinking portion 20 made of polyolefin-based shrinking member 21 is arranged in the circumferential direction, a hot air fan or the like is disposed. When heat is applied using the shrinkage amount in the longitudinal direction of the heat shrinkable tube is minimized, but the radius is reduced by contraction of the shrinking member 21 in the radial direction, so that it can serve as a general heat shrinkable tube.

In the embodiment shown in FIG. 3, the left area A1 shows the state before heat shrinking and the right area A2 shows the state after heat shrinking to the maximum.

That is, here, the carbon fiber bundle 10 disposed in the first direction, which is the longitudinal direction of the carbon fiber heat-shrinkable tube 100 of the present invention, does not shrink, and in the second direction, which is the circumferential direction of the carbon fiber heat-shrinkable tube 100. The shrinking member 21 constituting the arranged shrinking portion 20 may be contracted to be in close contact with an area to be closed, such as a cable connection portion.

The shrinking member 21 is a polyolefin-based resin material wire, the diameter is 0.25 millimeter (mm) to 0.3 millimeter (mm), and two are shown as constituting one shrinking part, but the number can be increased or decreased.

In addition, when the shrink member disposed in the circumferential direction of the carbon fiber heat shrink tube 100 is made of a polyolefin material, the carbon fiber heat shrink tube may generally have a maximum outer diameter of 40% to 60%, and preferably Can shrink up to about 50%.

4 to 12 show a graph of the shielding rate result according to the maximum contracted tube outer diameter ratio compared to the cable outer diameter, and Tables 1 to 6 below are heat shrinkable tubes of the present invention, having a diameter of 5 millimeters (mm), 10 millimeters ( mm), shows the test result of measuring the shielding effect (@100 MHz shielding rate dB) according to the contracted tube outer diameter ratio compared to the cable by attaching a heat shrinkable tube having various outer diameters (D) before cables to a 30 mm (mm) cable. do.

Specifically, Table 1, Table 2, Figures 4 to 6 is 5 mm (mm) outer diameter of the cable by installing a heat-shrinkable tube of various outer diameters compared to the outer diameter of the cable (d) tube outer diameter (D') of the maximum contracted state It is the result of measuring the shielding rate according to the ratio, and the both cable connection parts are finished and heat-shrinked with the carbon fiber heat-shrinkable tube 100 of each test example, the shielding layers of both cables are connected with the carbon fiber heat-shrinkable tube 100, and the cable When the 100 Mhz test current was passed through, it was tested by measuring the shielding rate at the cable connection site.

For example, the ratio of the maximum contracted tube outer diameter (D') to the cable outer diameter (d) is 54%, assuming that the tube surrounding the cable is in the maximum contracted state, the outer diameter is about 54% of the outer diameter of the cable. It means having a size. Here, the maximum contracted tube outer diameter (D') means the outer diameter of the tube when the heat-shrinkable tube is heated, and is no longer contracted and maintains the outer diameter.

According to the test results, it was confirmed that the ratio of the maximum contracted tube outer diameter to the outer diameter of the cable was measured to be good at about 40 dB from 54% to 98%, with the ratio of 98% and 54% as the boundary.

That is, as shown in Fig. 6, the maximum contracted tube outer diameter ratio compared to a cable of 5 mm (mm) outer diameter is 54% to 98%, the shielding rate is about 40 dB, and the carbon fiber heat shrink tube of the present invention is electromagnetic wave. It can be used as a finishing material for shielding.

However, it can be confirmed that in areas other than 54% to 98%, the shielding rate is greatly reduced, so that it is difficult to expect a good shielding effect.

Maximum contracted tube outer diameter ratio compared to cable outer diameter Cable outer diameter 5 mm (mm)
Shielding rate (@100MHz shielding rate dB) 100% 14 99% 14 98% 41 97% 41 96% 40 95% 40

Maximum contracted tube outer diameter ratio compared to cable outer diameter Cable outer diameter 5 mm (mm)
Shielding rate (@100MHz shielding rate dB) 55% 41 54% 39 53% 23 52% 23 51% 21 50% 24

Table 3, Table 4, FIGS. 7 to 9 are the results of measuring the shielding ratio according to the maximum contracted tube outer diameter ratio compared to the outer diameter of the cable by mounting a heat shrinkable tube of various outer diameters to a cable of 10 mm (mm) outer diameter. According to, it was confirmed that the ratio of the maximum contracted tube outer diameter compared to the 10 mm (mm) cable is 98% and 54%, and the ratio is measured to be about 40 dB at 54% to 98%.

As a result of the test, as shown in FIG. 9, the maximum contracted tube outer diameter ratio compared to a cable with an outer diameter of 10 mm (mm) should also be secured to a condition of 54% to 98%. It can be confirmed that it is preferable.

Maximum contracted tube outer diameter ratio compared to cable outer diameter Cable outer diameter 10 mm (mm)
Shielding rate (@100MHz shielding rate dB) 100% 12 99% 13 98% 40 97% 39 96% 42 95% 41

Maximum contracted tube outer diameter ratio compared to cable outer diameter Cable outer diameter 10 mm (mm) shielding rate (@100 MHz shielding rate dB) 55% 42 54% 42 53% 22 52% 24 51% 23 50% 25

Table 5, Table 6, FIGS. 10 to 12 are the results of measuring the shielding ratio according to the contracted tube outer diameter ratio compared to the cable by attaching a heat shrinkable tube of various outer diameter to a cable of 30 mm (mm) outer diameter. , It was confirmed that the ratio of the maximum contracted tube outer diameter compared to the 30 mm (mm) cable was 98% and 54%, and the ratio was measured to be about 40 dB at 54% to 98%.

Similarly, as shown in FIG. 12, the maximum contracted tube outer diameter ratio of 54 mm to 98% compared to a cable of 30 mm (mm) outer diameter should be secured, so that the carbon fiber heat shrinkable tube of the present invention is preferable as a finishing material for electromagnetic wave shielding. Can be confirmed.

Maximum contracted tube outer diameter ratio compared to cable outer diameter Cable outer diameter 30 mm (mm)
Shielding rate (@100MHz shielding rate dB) 100% 11 99% 13 98% 40 97% 42 96% 42 95% 39

Maximum contracted tube outer diameter ratio compared to cable outer diameter Cable outer diameter 30 mm (mm)
Shielding rate (@100MHz shielding rate dB) 55% 40 54% 42 53% 21 52% 21 51% 25 50% 22

As a result, even if the outer diameter of the cable is increased to 5 millimeters (mm), 10 millimeters (mm), and 30 millimeters (mm), the shielding rate is critical based on the maximum contracted tube outer diameter ratio of 54% and 98% compared to the cable outer diameter. It can be confirmed that it changes.

When considering the above test results, the maximum contracted tube outer diameter (D') compared to the outer diameter (d) of the cable can be summarized as follows.

In the case of the heat-shrinkable tube 100, it acts as a finishing material surrounding a connection portion such as a cable or a pipe, and in order to secure a good shielding rate, the outer diameter (d) of an object, such as a cable on which the heat-shrinkable tube is mounted, and the maximum contracted heat shrink The relationship between the outer diameter (D') of the tube can be designed to satisfy [Equation 1] below.

[Equation 1]

54% ≤ D'/d * 100% ≤ 98%

If the outer diameter (D') of the maximum shrinked heat shrink tube is less than 54% of the cable outer diameter (d) through the above relationship, the outer diameter (D) of the heat shrink tube before shrinkage is selected to be too small compared to the outer diameter (d) of the cable. As it was not easy to install on the cable, it was confirmed that it was insufficient to enjoy sufficient electromagnetic shielding effect, and when the outer diameter (D') of the maximum contracted heat shrink tube exceeded 98% of the outer diameter (d) of the cable The outer diameter (D) of the heat shrinkable tube before shrinkage is too large compared to the outer diameter (D) of the heat shrinkable tube, so it was confirmed that the electromagnetic wave shielding performance deteriorates due to insufficient contact with the cable.

13 shows a cross-sectional view of a carbon fiber braided member 100' or carbon fiber heat shrink tube 100 according to the present invention.

Each shrinking portion 20 is arranged by configuring the carbon fiber bundle 10 and the braided structure in a direction perpendicular to the longitudinal direction of the carbon fiber heat shrink tube or the first direction of the braided member.

As described above, as the shrinking member 21 constituting the shrinking portion 20, a wire made of polyolefin may be applied, and the diameter (x) of each wire is 0.25 mm (mm) to 0.3 mm (mm). Can be configured.

And, as shown in Fig. 13, each of the shrinking portions is arranged with two shrinking members 21 side by side, and each shrinking portion is spaced apart in the first direction of the braided member or in the longitudinal direction of the carbon fiber heat shrink tube 100. Can be.

Here, the width (2x) of each shrinking portion composed of a shrinking member having a width of x may be about 0.5 mm (mm) to 0.6 mm (mm), and the spacing y between adjacent shrinking portions is the width of each shrinking portion (2x). It can be made larger.

That is, the carbon fiber bundle is composed of thousands of carbon fiber yarns, and when the carbon fiber bundle constitutes a heat-shrinkable tube and shrinks and adheres to a mounting target, carbon fiber yarns spread in the circumferential direction of the heat-shrinkable tube to perform an electromagnetic wave shielding function, etc. Can be.

However, since the shrinking member is configured to perform a circumferential shrinking function, it is sufficient to apply a sufficient amount for shrinking.

14 to 22 show the electromagnetic wave shielding rate test results according to the number of shrink members disposed per 1 inch constituting the carbon fiber heat-shrinkable tube according to the present invention, and Tables 7 to 12 below are the heat-shrinkable tubes of the present invention. Shielding effect according to the number of shrink members per unit length (inch) by attaching a heat shrink tube with a different number of shrink sections to cables with outer diameters of 5 mm (mm), 10 mm (mm), and 30 mm (mm) (@100 MHz shielding Rate dB) is shown.

Specifically, Table 7, Table 8, FIGS. 14 to 16 are results of measuring the shielding ratio according to the number of shrinking members by attaching a heat shrink tube having a different number of shrinking members to a 5 mm outer diameter cable. Carbon fiber heat-shrinkable tube 100 of the test example closes and heat-shrinks both cable connection parts, connects the shielding layers of both cables to the carbon fiber heat-shrinkable tube 100, and connects the cable when conducting 100 Mhz test current through the cable It was tested by measuring the shielding rate at the site.

According to the test results, it was confirmed that the number of shrinkable members is good when the average is 17 or more and 41 or less per unit length (inch).

That is, as shown in FIG. 16, the shielding rate is good at about 40 dB in the condition that the average of 17 or more and 41 or less shrinkage members per unit length (inch) in a cable with an outer diameter of 5 mm (mm) is good, and the number of shrinkage parts When less than 17 or greater than 41, the shielding rate is critically reduced, and thus it can be confirmed that the shielding member is inappropriate.

Shrinkage member density (pcs/inch) Cable outer diameter 5 mm (mm)
Shielding rate (@100MHz) 15 23 16 23 17 39 18 41 19 38 20 42

Shrinkage density (pcs/inch) Cable outer diameter 5 mm (mm)
Shielding rate (@100MHz) 40 41 41 39 42 22 43 23 44 21 45 20

Likewise, Table 9, Table 10, and FIGS. 17 to 19 show the results of measuring the shielding ratio according to the number of shrinking members by attaching a heat shrink tube having a different number of shrinking portions to a cable having an outer diameter of 10 mm (mm). Even in the case of a cable having an outer diameter of 10 mm (mm), it was confirmed that the average number of shrinkage members per unit length (inches) was 17 or more and 41 or less, and the measurement was satisfactorily about 40 dB.

That is, as shown in FIG. 19, in a condition in which the average number of shrink members per unit length (inches) is 17 or more and 41 or less in a cable having an outer diameter of 5 mm (mm), the shielding rate is good at about 40 dB, and 17 If it is less than or greater than 41, the shielding rate is critically reduced, and it can be confirmed that the shielding member is inappropriate.

Shrinkage member density (pcs/inch) Cable outer diameter 10 mm (mm)
Shielding rate (@100MHz) 15 24 16 26 17 40 18 42 19 42 20 41

Shrinkage member density (pcs/inch) Cable outer diameter 10 mm (mm)
Shielding rate (@100MHz) 40 39 41 40 42 21 43 22 44 22 45 21

Likewise, Table 11, Table 12, and FIGS. 20 to 22 are results of measuring a shielding ratio according to the number of shrink members by mounting a heat shrink tube having a different number of shrink members on a cable having a diameter of 30 mm (mm). Even in the case of a cable having an outer diameter of 30 mm (mm), it was confirmed that the average number of shrinkage members per unit length (inches) was 17 or more and less than or equal to 41, which is a good measurement of about 40 dB.

Shrinkage member density (pcs/inch) Cable outer diameter 30 mm (mm)
Shielding rate (@100MHz) 15 21 16 20 17 39 18 40 19 40 20 39

Shrinkage member density (pcs/inch) Cable outer diameter 30 mm (mm)
Shielding rate (@100MHz) 40 43 41 42 42 21 43 23 44 22 45 23

As a result, even if the outer diameter of the cable is increased to 5 millimeters (mm), 10 millimeters (mm), and 30 millimeters (mm), the number or density of shrink members per unit length (inch) is shielded based on 17 and 41 per inch. It can be seen that the rate is critically changed.

As a result, when the average number of shrink members per unit length (inch) is less than 17, a lot of empty space between the carbon fiber bundle and the shrink member occurs, and the average number of shrink members per unit length exceeds 41. It is presumed that the carbon fiber yarns constituting the carbon fiber bundle are not sufficiently dispersed in the circumferential direction due to interference due to a shrinking member or the like, and the electromagnetic wave shielding effect is deteriorated.

Therefore, when the number of heat-shrinkable tubes for circumferential contraction of the heat-shrinkable tube is appropriately determined in consideration of the diameter of the shrinkage member or the width of the shrinkage member, the carbon fiber bundle composed of the carbon fiber bundle is disposed in the longitudinal direction of the heat-shrinkable tube. It can be seen that even when 100 MHz frequency test current, which is a high frequency region, is applied, a good shielding rate of 40 dB or more can be obtained.

Therefore, through these test results, in the high-frequency region of about 100 Mhz, a shielding means in the form of a metal braided member is applied with a heat-shrinkable tube to which an optimal number of shrinkage units consisting of carbon fiber bundles and shrinkable polyolefin shrinkage members are applied, By replacing the metal braided member, welding work can be omitted to improve workability, cable weight reduction can be achieved, and the carbon fiber heat-shrinkable tube has sufficient rigidity and elasticity to stably protect the cable connection area. Can get

23 shows another embodiment of the carbon fiber braided member 100' and the carbon fiber heat shrink tube 100 according to the present invention.

When the heat shrink tubing is configured based on the carbon fiber bundle and the shrinking portion, a heat shrinking tube capable of shrinking and securing a stiffness and elasticity and having a significantly reduced weight compared to a conventional braided member or braided layer of a metal material can be constructed.

Carbon fiber is not a conductor, but has a certain degree of conductivity, so it is possible to use the carbon fiber braided member 100' shown in FIG. 1 or the carbon fiber heat shrink tube 100 shown in FIG. 2 as an electromagnetic shielding member. It is like one.

The carbon fiber braided member 100' shown in FIG. 1 or the carbon fiber heat-shrinkable tube 100 shown in FIG. 2 can secure sufficient performance as a shielding layer such as a communication cable in a low frequency region, but shielding performance in a high frequency region Since the carbon fiber braided member 100' and the carbon fiber heat shrink tube 100 according to the present invention may be insufficient, the carbon fiber heat shrink tube 100 is formed by metal plating the carbon fibers constituting the carbon fiber bundle 10. Shielding performance can be improved.

As shown in FIG. 23, each carbon fiber yarn 11' constituting the carbon fiber bundle 10 arranged in the first direction, which is the longitudinal direction of the carbon fiber heat shrinkable tube 100, is metal plated to impart metallicity can do.

As described above, in order to utilize the carbon fiber heat-shrinkable tube 100 of the present invention as a cable shielding layer or the like, even in the case of metal-plating carbon fiber, only some carbon fiber yarns constituting one carbon fiber bundle 10 are metal coated. In addition, the remaining carbon fiber yarns may be constructed of carbon fiber bundles 10 by applying general carbon fiber yarns.

For example, if the carbon fiber bundle 10 is applied with 6k carbon fiber yarn, only 3k carbon fiber may be applied with metal coating. In addition, a part of the carbon fibers in the bundle may be replaced with a metal filament made of a metal such as copper, and the carbon fiber yarn and the metal filaments may be mixed to form a bundle.

In addition, a metal plated carbon fiber bundle 10 and an uncoated carbon fiber bundle 10 among a plurality of carbon fiber bundles 10 that are spaced apart from each other constituting one carbon fiber heat shrinkable tube 100 may be used together. Can be. For example, the metal plated carbon fiber bundle 10 and the uncoated carbon fiber bundle 10 may be alternately disposed or may be disposed in a ratio of 1:2 or 1:3. Further, instead of the metal plated carbon fiber bundle 10, a metal filament bundle composed of only metal filaments made of metal such as copper may be applied.

In addition, in this case, one metal plated carbon fiber bundle 10 also does not have to be all carbon fiber yarns metal plated, but only some carbon fiber yarns constituting one carbon fiber bundle 10 may be metal coated. As described above.

The metal plating material of the carbon fiber yarn may be copper, gold, silver, aluminum or nickel, or an alloy material thereof, and the plating density is appropriately about 2.7 g/cm3 or less.

Although this specification has been described with reference to preferred embodiments of the present invention, those skilled in the art variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You can do it. Therefore, if the modified implementation basically includes the components of the claims of the present invention, it should be considered that all are included in the technical scope of the present invention.

100: carbon fiber heat shrink tube
10: carbon fiber bundle
11: carbon fiber
20: contraction
21: shrinking member

Claims (23)

A plurality of carbon fiber bundles arranged in the longitudinal direction; And,
Includes a plurality of shrink members disposed in the circumferential direction;
The shrinking members are spaced apart from each other along the longitudinal direction,
A carbon fiber heat-shrinkable tube formed by winding a braided member formed by braiding the carbon fiber bundle and the shrinking member in a cylindrical shape. According to claim 1,
Carbon fiber heat shrink tube, characterized in that the shrink member is made of a polyolefin-based resin wire. According to claim 2,
The shrinking member is an average of 17 to 41 per unit length (inch) in the longitudinal direction of the carbon fiber heat shrink tube carbon fiber heat shrink tube, characterized in that provided. According to claim 3,
The shrinking member is a carbon fiber heat shrink tube, characterized in that the diameter of 0.25 millimeter (mm) to 0.3 millimeter (mm). According to claim 3,
The shrinking member is a carbon fiber heat-shrinkable tube, characterized in that a plurality of the shrinkage are arranged adjacent to each other to form one shrinkage part, and the plurality of shrinkage parts are spaced apart along the longitudinal direction of the carbon fiber heat-shrinkable tube. The method of claim 5,
The plurality of shrinking members constituting the shrinking portion is a carbon fiber heat shrinking tube, characterized in that arranged in parallel to the longitudinal direction of the carbon fiber heat shrinking tube. The method of claim 5,
The shrinking member is a carbon fiber heat-shrinkable tube, characterized in that two constitute one shrinking portion. According to claim 2,
Carbon fiber heat shrink tube, characterized in that the outer diameter (d) of the cable inserted into the carbon fiber heat shrink tube and the maximum contracted outer diameter (D') of the carbon fiber heat shrink tube satisfies the following [Equation 1].
[Equation 1]
54% ≤ D'/d * 100% ≤ 98% The method of claim 8,
The carbon fiber heat-shrinkable tube is a carbon fiber heat-shrinkable tube, characterized in that the outer diameter of 40% to 60% of the maximum shrinkable. According to claim 1,
The carbon fiber bundle is composed of 3k strands, 6k strands, or 12k strands of carbon fiber yarns, wherein the carbon fiber yarns are polyamide coated with carbon fiber heat shrink tubes. The method of claim 10,
Carbon fiber heat-shrinkable tube, characterized in that the carbon fiber yarn constituting the carbon fiber bundle is a PAN-based carbon fiber yarn having an elongation of 1% or more. The method of claim 10,
Carbon fiber heat shrinkable tube, characterized in that at least one carbon fiber bundle of the plurality of carbon fiber bundles are metal plated. The method of claim 10,
Carbon fiber heat-shrinkable tube, characterized in that some of the carbon fiber yarns constituting at least one carbon fiber bundle among the plurality of carbon fiber bundles are metal plated. The method of claim 12 or 13,
The carbon fiber metal plating material is copper, gold, silver, aluminum or nickel or a carbon fiber heat shrink tube, characterized in that the alloy material. The method of claim 14,
Carbon fiber heat shrink tube, characterized in that the plating density of the metal plating of the carbon fiber bundle is 2.7 g / cm3 or less. A plurality of carbon fiber bundles disposed in a first direction; And,
Includes; a plurality of shrink members disposed in a second direction perpendicular to the first direction;
A carbon fiber braided member constructed by braiding the carbon fiber bundle and the shrinking member. The method of claim 16,
The shrinking member is composed of a polyolefin wire, and the shrinking member is arranged in a plurality of adjacent parts to form one shrinking part, and the plurality of shrinking parts are spaced apart in the first direction and arranged in a second direction. Carbon fiber braided member. The method of claim 17,
Carbon fiber braided member, characterized in that the plurality of shrinking members constituting the shrinking portion are arranged in a single layer. The method of claim 17,
The shrinking member is a polyolefin-based resin material wire, the diameter of 0.25 millimeter (mm) to 0.3 millimeter (mm), carbon fiber braided member, characterized in that two constitute one shrinkage. The method of claim 19,
The shrinking member is an average of 17 to 41 per unit length (inch) in the first direction, characterized in that the carbon fiber braided member is provided. The method of claim 16,
The carbon fiber bundle is composed of 3k strands, 6k strands, or 12k strands of carbon fiber yarns, wherein the carbon fiber yarns are polyamide coated. The method of claim 21,
Carbon fiber braided member, characterized in that the carbon fiber yarn constituting the carbon fiber bundle is a PAN-based carbon fiber yarn having an elongation of 1% or more. The method of claim 16,
Carbon fiber braided member, characterized in that the carbon fiber yarns of some of the carbon fibers constituting at least one carbon fiber bundle of the plurality of carbon fiber bundles or at least one carbon fiber bundle of the plurality of carbon fiber bundles.

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