WO2014027764A1

WO2014027764A1 - Cable having reduced tendency to become tangled

Info

Publication number: WO2014027764A1
Application number: PCT/KR2013/006510
Authority: WO
Inventors: 김선기; 손호성
Original assignee: 조인셋 주식회사
Priority date: 2012-08-13
Filing date: 2013-07-19
Publication date: 2014-02-20
Also published as: KR20140022342A; KR101244413B1; KR101443577B1

Abstract

Disclosed is a cable having a reduced tendency to become tangled. The cable consists of: a metal core for transmitting electrical signals; a flexible insulating sheath surrounding the metal core; and a coated layer surrounding and adhering to the insulating sheath, which is cured, flexible and elastic, wherein the coated layer surrounds and adheres to the insulating sheath by means of impregnating a powder-mixed polymer in the liquid phase with the insulating sheath, thereby curing the liquid-phase polymer. Further, the friction coefficient of the coated layer is less than the friction coefficient of the insulating sheath, and the hydrophobicity of the coated layer is greater than the hydrophobicity of the insulation sheath. Also, the thickness of the coated layer is less than the thickness of the insulating sheath.

Description

Tangle-Reduced Cable

The present invention relates to a cable, and more particularly, to a cable that is loosely entangled even though it is not entangled by reducing the friction coefficient of the outermost surface.

In addition, the present invention relates to a cable having a property that is easy to be restored to its original state after being wrinkled without being wrinkled easily, and the outer surface is not easily scratched, foreign substances such as dust are not stained well, and resistant to contamination.

Signal transmission cables used to transmit and receive electrical signals generated from audio or video devices are connected to earphones, headphones, speakers, or video displays. Here, cables used for earphones, headphones, and measuring instruments usually have good flexibility.

As is well known, the structure of a cable consists of a metal conductor carrying a signal and an insulating sheath protecting the metal conductor, or an insulating jacket formed over the insulation sheath so as to be less affected by ambient electromagnetic noise. Alternatively, a metal shield and an insulating jacket may be provided over the insulating coating to reduce transmission loss.

Usually, the insulating coating is made of an insulating polymer resin, and these insulating polymer coatings are prepared by extruding a corresponding insulating polymer resin on a metal conductor using an extruder, and the insulating polymer resin used for the insulating polymer coating or the insulating jacket is well As is known, thermoplastic resins such as PVC and Non-PVC or thermosetting rubbers such as silicone rubber are selected and used.

In general, thermoplastic resins such as PVC or non-PVC-based resins are relatively inexpensive and easy to extrude, but have disadvantages of poor elasticity and resilience. Thermosetting rubbers such as silicone rubbers have elasticity and flexibility. On the other hand, there are disadvantages in that the friction coefficient is large, the hardness is low, and the manufacturing cost is high.

As described above, it is difficult for the insulation coating and the insulation jacket constituting the conventional cable to use a polymer corresponding to the insulation coating and the insulation jacket to reduce the coefficient of friction of the outer surface of the cable and to increase the hydrophobicity.

As a result, the conventional cable has a problem that the surface friction coefficient of the insulating coating or the insulating jacket constituting the outermost surface is relatively large, as follows.

a) The cable is tangled and difficult to loosen if tangled.

b) If the cable moves in contact with the skin, it will not feel good and the skin will be easily damaged by the surface friction.

c) When the cable comes into contact with an external object, noise occurs due to friction.

In addition, there is a disadvantage that the hardness of the surface of the insulating coating or the insulating jacket is relatively low, so that it is easy to be damaged by external friction or the opposite object.

In addition, the elasticity and the restoring force of the insulating coating or insulating jacket is relatively bad, there is a problem that does not stretch well once wrinkled.

In addition, the hydrophobicity of the insulation coating or insulation jacket is small, it is easy to get foreign matter on the surface, once the foreign matter on the surface does not fall well, and the writing tools such as ballpoint pens are good at graffiti and not easily erased after graffiti, that is, the disadvantage of contamination have.

In addition, the hydrophobicity of the surface of the insulating coating or the insulating jacket is small and hygroscopic, and it is easy to swell or discolor by salt water or sweat.

In addition, the surface of the insulating coating or the insulating jacket is easily discolored by ultraviolet (UV).

In addition, there is a disadvantage that the surface of the insulating coating or insulating jacket does not shine and the color is not beautiful.

As an example, if an insulation sheath or jacket is applied to a smartphone's earphones with a cable made of flexible PVC-based resin, Non-PVC-based resin or PU-based resin, the earphones are often put in or removed from the pocket Considering the characteristics of using, earphones have a relatively high coefficient of friction and weak elasticity, making them easy to entangle with each other, and once entangled with each other, they are not easy to loosen, and wrinkles are not easily restored, and hardness is low, so they are easily damaged, and hydrophobic, There is a disadvantage that it is easily contaminated by foreign substances such as.

In addition, when the earphone rubs with clothes, it is easy to generate friction noise, and when it comes in contact with the neck, it is easy to swell or discolor by sweat on the neck. In case of excessive exposure to the sun, the color is easily changed, and it is difficult to have a beautiful appearance and gloss.

This problem occurs equally not only for earphone cables, but also for instrument cables, robot cables, and computer cables used in frequently moving applications.

Accordingly, it is an object of the present invention to provide a cable that is easily entangled even if it is not entangled.

Another object of the present invention is to provide a cable that is well restored to its original shape after being creased.

Another object of the present invention is to provide a cable that provides smoothness upon skin contact.

Another object of the present invention is to provide a cable that is hardly scratched by an object facing the surface.

Another object of the present invention is to provide a cable that falls well even if the foreign matter on the surface.

Another object of the present invention is to provide a cable whose surface is not contaminated by foreign matter.

Another object of the present invention is to economically provide a cable having a small coefficient of friction, a high hydrophobicity and a good elasticity.

Another object of the present invention is to economically provide a cable having improved heat resistance temperature.

Another object of the present invention is to provide a cable with minimized friction noise.

Another object of the present invention is to provide a cable whose surface is not easily discolored or deformed by foreign matter.

Another object of the present invention is to economically provide a cable having a low coefficient of friction, beautiful appearance and high gloss.

The above object, the metal core for electrical signal transmission; An insulating coating having flexibility formed around the metal core; And a coating layer that is bonded and cured while being insulated and cured and has flexibility and elasticity, wherein the insulating polymer is impregnated in a liquid polymer mixed with powder, and the adhesive is wrapped and bonded in the process of curing the liquid polymer. The coating layer is formed, the friction coefficient of the coating layer is smaller than the friction coefficient of the insulating coating, the hydrophobicity of the coating layer is larger than the hydrophobicity of the insulating coating, the thickness of the coating layer is characterized in that the thickness of the insulating coating Achieved by a cable with reduced tangles.

Preferably, the liquid polymer is a synthetic rubber after the curing, the synthetic rubber may be any one of silicone rubber, urethane rubber, olefin rubber or styrene rubber.

Preferably, the powder is at least one selected from a) a first powder consisting of three-dimensional crosslinked silicone powder, acrylic powder, ceramic powder, fluorine powder and monodisperse polystyrene, or b) mica powder, silica powder, glass At least one selected from a second powder consisting of powder, graphite powder or alumina powder, or c) at least one selected from each of the first and second powders.

Preferably, the shape of the particles constituting the first powder may be a sphere, and the shape of the particles constituting the second powder may be a plate.

Preferably, iron oxide or titanium dioxide may be mixed in the second powder.

Preferably, the light refractive index of the synthetic rubber may be different from the light refractive index of the second powder, and the cable has a gloss due to the difference in the light refractive index.

Preferably, the heat resistance temperature of the coating layer is higher than the heat resistance temperature of the insulating coating, the hardness of the coating layer may be higher than the hardness of the insulating coating.

Preferably, the metal core may be any one of a metal single wire or a metal twisted wire in which a plurality of metal single wires are twisted together.

Preferably, the metal core may be composed of a metal single wire having an insulating layer formed by an enamel coating on its outer surface, or may be composed of a twisted pair of metal single wires.

Preferably, one insulation coating surrounds one metal core or a plurality of metal cores insulated from each other, or a plurality of insulation coatings may surround one metal core or a plurality of metal cores insulated from each other. .

Preferably, the metal core may be wrapped by an insulating thread or may be arranged side by side adjacent to the metal core.

Preferably, the coating layer may be electrically insulating or electrically semiconductive.

Preferably, the curing may be either thermal curing or ultraviolet (UV) curing.

The above object, at least one metal core for electrical signal transmission; An insulation coating having at least one flexibility formed around the metal core; An insulating jacket having flexibility formed around the insulating coating; And an elastic coating layer covering the insulating jacket and having a bonded and cured flexibility, wherein the insulating jacket is impregnated with a liquid polymer mixed with powder, and the adhesive is wrapped around the insulating jacket in the process of curing the liquid polymer. A coating layer is formed, the friction coefficient of the coating layer is smaller than the friction coefficient of the insulating jacket, the hydrophobicity of the coating layer is larger than the hydrophobicity of the insulating jacket, the thickness of the coating layer is entangled, characterized in that thinner than the thickness of the insulating jacket This is achieved by cables with reduced castles.

Preferably, the method may further include a metal shield surrounding the insulating coating between the insulating coating and the insulating jacket.

Preferably, the insulating jacket is formed by continuously extruding the insulating coating, or may be a separately produced insulating tube, the insulating tube is formed by sandwiching the insulating coating.

Preferably, the heat resistance temperature of the coating layer is higher than the heat resistance temperature of the insulation jacket, the hardness of the coating layer may be higher than the hardness of the insulation jacket.

Preferably, the plurality of metal cores, the insulation coating wraps or wraps the metal core, respectively, and the insulation jacket may wrap the insulation coating at the same time.

Preferably, the cable may be an earphone cable, an instrument cable, a robot cable, or a computer cable used to be exposed to the outside.

According to the above structure, since the friction coefficient of the outermost surface of the cable is small, the hydrophobicity is large, and the elasticity is good, it does not get tangled easily, but it is easily released even when it is tangled. Self-resilience also improves, even if wrinkled can be easily stretched out.

In addition, the friction coefficient of the outermost surface of the cable is small to minimize the friction noise due to friction with the external object, the hydrophobic and hardened outermost surface of the hardened cable is not easily discolored or deformed by foreign matter.

In addition, since the hardness of the outermost surface of the cable is high, scratches are less likely to be caused by the contacting object.

In addition, only a thin coating layer on the outermost side of the cable is formed to be continuously and reliably adhered by impregnation and curing, and adhered by curing, so that the manufacturing cost is low and the coating layer is hardly peeled off.

In addition, by forming the outermost coating layer of elastic rubber having good heat resistance, the heat resistance temperature of the cable can be improved.

In addition, in order to reduce the friction coefficient and increase the hydrophobicity, by adding powder having a small friction coefficient and large hydrophobicity, the manufacturing process is simple and the manufacturing cost is low.

In addition, it is possible to add a powder having a gloss so that the gloss of the outermost surface of the cable is excellent and the brightness by reflection is improved.

1 shows a cable according to an embodiment of the present invention.

1A shows a cable according to a variant of FIG. 1.

2 shows a cable according to another embodiment of the present invention.

3 shows a cable according to another embodiment of the present invention.

Figure 4 shows a cable according to another embodiment of the present invention.

Figure 5 shows a cable according to another embodiment of the present invention.

Hereinafter, a cable according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a cable according to an embodiment of the present invention.

The cable 100 is composed of a metal core 110, an insulating coating 120 having flexibility and surrounding the metal core 110, and an elastic coating layer 130 having an elasticity and flexibility and surrounding the insulating coating 120.

The cable 100 of the present invention serves to transmit an electric signal or electricity and can be used for electrically transmitting voice, image, data or electric power. For example, earphone, smartphone, computer, vacuum cleaner, robot, Used in automobiles, motorcycles or elevators. In particular, earphone cables, instrument cables, robot cables, or computer cables, which are used for frequent movement due to exposure to the outside, should have flexibility, good elasticity, small changes to external environmental changes, and beautiful appearance. It is preferable.

The metal core 110 may be a metal single wire composed of copper or a copper alloy having good electrical conductivity and flexibility, or may be a metal twisted wire in which a plurality of metal wires of small diameter are twisted together. The disconnection may consist of copper or a copper alloy.

In addition, the metal core 110 may be wrapped by an insulation thread or may be arranged adjacent to the metal core 110 in parallel with each other so that the flexibility thereof is good and may not be easily broken.

When the metal core 110 is a stranded wire, each metal wire of the stranded metal wire may have a diameter of 0.01 mm to 0.1 mm with high flexibility, but is not limited thereto.

Here, the number of the metal wires constituting the stranded wire is determined in consideration of the diameter, allowable current and flexibility of the wire, and the AWG (American Wire Gauge) of the stranded wire may be approximately AWG 20 to AWG 40, but is not limited thereto.

When the metal core 110 is a single wire, it is preferable that the diameter, the allowable current, the flexibility, and the like of the single wire be within the allowable range.

Although not shown, in the case where the metal core 110 is made of metal single wire, an insulating layer such as enamel may be formed on the outer surface of the metal single wire to form an insulating layer. A thin coating of an insulating material such as enamel may form an insulating layer, and a plurality of actual enameled wires may be combined to form a stranded metal wire.

As described above, the metal core 110 may be thinly enamel coated to have insulation, and a product having the same may be applied to an earphone cable having a relatively thin diameter and requiring flexibility.

In this embodiment, the cable 100 is provided with one metal core 110 as an example, but is not limited thereto and may include a plurality of metal cores, which will be described later.

In addition, in this embodiment, although the cable 100 has one insulating coating 120 wrapped around one metal core 110 as an example, but not limited to one insulating coating wrapping a plurality of metal cores Or a plurality of insulating coatings surrounding each of the plurality of metal cores, which will be described later.

The cross-sectional shape of the cable 100 is not particularly limited, but may be circular, elliptical or dumbbell like in this embodiment.

The insulating coating 120 is composed of an electrically insulating thermoplastic polymer resin, a thermoplastic rubber or a thermosetting rubber, and has flexibility, and may be formed by an extrusion process on the metal core 110. That is, the granules of the insulating polymer resin corresponding to the insulating coating 120 are continuously formed on the metal core 110 by using an extruder.

Since the metal core 110, the insulating coating 120, and the technique of forming the insulating coating 120 on the metal core 110 are generally well known techniques, detailed description thereof will be omitted.

The coating layer 130 may optionally have the following conditions, and thus have respective advantages.

a) the coefficient of friction of the coating layer 130 is smaller than the coefficient of friction of the insulating coating (120).

According to this characteristic, even if the cable 100 is not tangled well and is tangled easily, it is easily unfolded and folds easily when wrinkled. Provides smoothness on skin contact and less scratches when rubbing with skin without discomfort to the user. In addition, the friction noise generated when the cable 100 rubs with clothes and the like is small.

b) hydrophobicity of coating layer 130 is greater than hydrophobicity of insulating coating 120.

According to this characteristic, since the hydrophobicity of the coating layer 130 is large, there is an advantage that the foreign matter does not bury well after falling off, and is not contaminated with a liquid material such as ink well. In addition, there is an advantage that the cable 100 is not easily discolored and deformed because it does not absorb salty sweat or various solutions.

c) The thickness of the coating layer 130 is thinner than the thickness of the insulating coating 120, the heat resistance temperature of the coating layer 130 is higher than the heat resistance temperature of the insulating coating (120).

According to this characteristic, since the thickness of the coating layer 130 is thinner than the thickness of the insulating coating 120 and the coating time is short, the coating layer 130 having a high heat resistance temperature can be efficiently coated on the insulation coating 120 having a low heat resistance temperature. have. In addition, the coating layer 130 having good heat resistance has the advantage that the heat resistance of the cable 100 is improved as a result.

d) coating layer 130 has flexibility and elasticity.

According to this characteristic, when the cable 100 is wrinkled, there is an advantage that it can be easily unfolded and absorb some external shocks.

e) The hardness of the coating layer 130 is higher than the hardness of the insulating coating 120.

According to this characteristic, the cable 100 has an advantage that the wound is not easily scratched when the contact with the object. In addition, since the tensile strength of the cable 100 is increased, as a result, there is an advantage of extending the life of the cable 100.

f) The coating layer 130 may have a high gloss.

As a result, the outermost surface of the cable 100 has excellent gloss and reflection brightness.

The coating layer 130 may be formed by impregnating the liquid polymer mixed with the powder and curing the liquid polymer to surround and insulate the insulating coating 120. In this case, the coating layer 130 may be manufactured by curing while moving the insulation coating 120 in the vertical direction after the coating layer 130 is immersed in the horizontal direction in the liquid polymer mixed with the powder so that the thickness of the coating layer 130 is constant.

Liquid polymers are blended with one or more powders to reduce the coefficient of friction and increase hydrophobicity, or to enhance gloss.

For example, in order to reduce the coefficient of friction and increase the hydrophobicity, from the first powder consisting of three-dimensional cross-linked silicone powder, acrylic (PMMA) powder, ceramic powder, fluorine powder and monodisperse polystyrene At least one selected may be mixed.

In addition, at least one selected from mica powder, silica powder, glass powder, graphite powder, and alumina powder may be mixed to reduce the coefficient of friction, increase hydrophobicity, increase gloss, and increase reflection brightness.

Therefore, it is obvious that at least one selected from the first powder and at least one selected from the second powder may be mixed at one time.

The coating layer 130 has a low coefficient of friction, a high hydrophobicity, and a high mechanical strength by using both the first powder and the second powder. The first powder is advantageous in reducing the friction coefficient of the coating layer 130 and increasing the hydrophobicity. , The second powder is advantageous to polish the coating layer 130, but the present invention is not limited thereto.

The liquid polymer is thermoplastic synthetic rubber or thermosetting synthetic rubber having elasticity after curing. For example, the synthetic rubber may be any one of silicone rubber, urethane rubber, olefin rubber or styrene rubber having elasticity, but is not limited thereto.

For example, in order to reduce the coefficient of friction and increase the hardness, at least one of the first powder is mixed in a liquid silicone rubber base with a filler to form a coating layer 130 by about 1% to 25% by weight. can do.

Regarding the content of the first powder, a high content by weight increases the manufacturing cost, the appearance is not smooth, and the elasticity is poor. If the content is too small, the friction coefficient is small, the hydrophobicity is high, and the hardness is high. The disadvantage is that it is difficult.

The meaning of the above content should be interpreted in consideration of the main reason for mixing the first powder is to reduce the friction coefficient of the coating layer 130 and to increase the hydrophobicity. That is, since it is difficult to reduce the coefficient of friction only by the polymer constituting the coating layer 130 (eg, silicone rubber), the first powder is mixed, so that only the polymer constituting the coating layer 130 can achieve the object of the present invention. If so, the content of the first powder may be less or may not be included.

Silicone oil or solvent, which adjusts the viscosity, can be mixed with a liquid silicone rubber base, silica powder, curing agent, coloring agent, etc., and at least one of the small first powder is mixed in order to reduce the coefficient of friction and increase the hydrophobicity. A liquid silicone rubber may be coated on the insulating coating 120 and then cured to form a coating layer 130. Curing may be either thermal curing or UV curing.

Here, the liquid silicone rubber base has a self-adhesive force after curing, and is then self-adhesive with the insulating coating 120 after curing.

The shape of the particles constituting the first powder may be a sphere (sphere), the size is preferably 10 microns or less, but is not limited to this, the smaller the size, the smoother the surface of the coating layer 130.

The coating layer 130 may have a thickness of about 3 to 20 microns. When the thickness of the coating layer 130 is too thin, the coating layer 130 may be easily peeled off due to friction or abrasion and may not provide sufficient elasticity. It is disadvantageous that the thicker the more expensive the material cost and the longer the manufacturing time, the more expensive the manufacturing cost.

As described above, the coating layer 130 formed by the mixing of the first powder evenly mixed with the liquid silicone rubber base reduces the friction coefficient of the cable 100, increases the hydrophobicity, and increases the hardness.

The coating layer 130 is electrically insulated, but may be used for antistatic by having electrical conductivity if necessary, and for this, an electrically conductive powder such as carbon, graphite, or CNT may be added. When the coating layer 130 is used for antistatic, the electrical resistance may be 10 ³ Ω to 10 ¹⁰ Ω.

In order for the coating layer 130 to be reliably adhered on the insulating coating 120, an additional adhesion enhancer for enhancing adhesion to the liquid silicone rubber is impregnated with the insulating coating 120, and then the liquid silicone rubber is applied. It can form by hardening.

The heat resistance temperature of the coating layer 130, that is, the curing temperature may be equal to or higher than the heat resistance temperature of the insulating coating 120. For example, the heat resistance temperature of silicone rubber is higher than the heat resistance temperature of the insulating coating 120 formed of a conventional thermoplastic polymer resin.

However, as described above, since the thickness of the coating layer 130 is thinner than the thickness of the insulating coating 120 and the coating time is short, the coating layer 130 having a high heat resistance temperature is placed on the insulating coating 120 having a low heat resistance temperature. Coating can be efficiently performed while minimizing deformation or deterioration of the

The coefficient of friction of the coating layer 130 with respect to the insulating coating 120 is different depending on the surrounding environment and the test conditions, but the present invention is the friction coefficient of the coating layer 130 than the friction coefficient of the insulating coating 120 under the same environment and test conditions It may mean about 5% or more, but is not limited thereto.

In addition, as described above, the hydrophobicity of the coating layer 130 may be greater than the hydrophobicity of the insulating coating 120, the water droplet contact angle may be 100 degrees or more with respect to the hydrophobicity of the coating layer 130, but is not limited thereto.

As another example of manufacture, at least one of the second powder may be mixed with the liquid silicone rubber base to lower the friction coefficient of the coating layer 130, increase hydrophobicity, impart excellent gloss and brightness, and increase mechanical strength. have.

The light refractive index of the synthetic rubber such as silicone rubber constituting the coating layer 130 is different from the light refractive index of the second powder mixed therein, and the cable 100 has glossiness due to the light refractive index of the second powder.

In order to improve the glossiness, the second powder may be mixed with iron oxide or titanium dioxide, and the shape of the particles constituting these powders is composed of a plate for light reflection and high gloss. The thickness may be about 5 microns or less, but not limited thereto. The thinner the thickness, the smoother the surface of the cable 100 is.

1% to 25% of the second powder may be mixed in the liquid silicone rubber base to form the coating layer 130. Like the first powder, if the content of the second powder is high, the manufacturing cost is high. There is a disadvantage that the increase is much, the appearance is not smooth and the elasticity is bad, and if too small, it is difficult to reduce the friction coefficient and increase the hardness.

As another example of manufacture, the coating layer 130 may be formed by mixing and curing at least one of the first powder and at least one of the second powder in a suitable proportion to the liquid silicone rubber base.

As such, when the first powder and the second powder are mixed with the liquid silicone rubber base at an appropriate ratio and cured to form the coating layer 130, the coating layer 130 of the cable 100 has a lower coefficient of friction and a hydrophobicity. There is an advantage that it is larger, higher hardness, elasticity, high gloss and beautiful appearance.

In this case, as described above, the first and second powders may be mixed with the liquid silicone rubber base to form a coating layer 130 by about 1% to 25% by weight, as long as it meets the purpose of the present invention. It is not limited.

As such, since the first powder and the second powder are mixed in the coating layer 130, the cable 100 may simultaneously have various advantages described above.

1A shows a cable according to a variant of FIG. 1.

According to this embodiment, the coating layer 130a is bent in a wave shape by repeating the rounded mountain 132 and the valley 134 along the circumferential direction. In other words, the thickness of the coating layer 130a is changed by bending.

According to this configuration, the light reflection and dispersion is well provided to provide a visual aesthetic, and the elastic restoring force is improved by bending, which is more advantageous to prevent wrinkles.

The coating layer 130a may be formed by impregnating a liquid polymer, then passing through a mold having the same bend on the inner surface and then curing.

2 shows a cable 200 according to another embodiment of the present invention.

The cable 200 is composed of two

metal cores

210 and 212, an insulating coating 220 surrounding the two

metal cores

210 and 212, and a coating layer 230 surrounding the insulating coating 220.

Metal cores

210 and 212 are electrically separated by an insulating coating 220.

Although two

metal cores

210 and 212 are described in this embodiment, three or

more metal cores

210 and 212 may be provided.

Preferably, the coating layer 230 is not melted by heat.

3 shows a cable 300 according to another embodiment of the present invention.

The cable 300 includes a pair of

metal cores

310 and 312 each formed of stranded wires, and

insulation coatings

320 and 322 surrounding the

metal cores

310 and 312 and the

insulation coatings

320 and 322 all at once. The coating layer 330 surrounds the jacket 340 and the insulating jacket 340.

Each of the

metal cores

310 and 312 is electrically separated from each other by insulating

coatings

320 and 322 surrounding the

metal cores

310 and 312.

Insulation jacket 340 may be formed, for example, by an extrusion process, and the material may be the same as insulation coating 120 described above, which is a well known technique. Accordingly, the granules of the polymer resin corresponding to the insulating jacket 340 are continuously extruded and formed on the insulating

coatings

320 and 322 having the

metal cores

310 and 312 therein by using an extruder.

The limitations on the characteristics of the coating layer 330 and the insulating jacket 340 are the same as the limitations on the characteristics of the coating layer 130 and the insulating coating 120 in the above embodiment. That is, the description of the insulating jacket 340 is applied to the insulating coating 120 of the above embodiment, the description of the coating layer 330 is applied to the coating layer 130 of the above embodiment.

That is, the friction coefficient of the coating layer 330 is smaller than the friction coefficient of the insulating jacket 340, the hydrophobicity of the coating layer 330 is greater than the hydrophobicity of the insulating jacket 340, and the thickness of the coating layer 330 is the insulating jacket 340. It is thinner than the thickness of the coating layer 330 is higher than the hardness of the insulating jacket 340.

To this end, the coating layer 330 may be formed by mixing at least one of the first powder or the second powder, or the first powder and the second powder with the liquid silicone rubber. In addition, in order to lower the friction coefficient of the coating layer 330, increase the hydrophobicity, and give gloss, the second powder may be mixed with the liquid silicone rubber base.

On the other hand, without applying the insulating jacket 340 formed by extrusion, it is possible to apply a separately prepared insulating tube. In this case, the coating layer 330 is formed by bonding to the outer surface of the insulating tube.

The insulating tube in which the coating layer 330 is formed is fitted by physical fitting on the insulating

coatings

320 and 322.

4 shows a cable 400 according to another embodiment of the present invention.

According to this embodiment, the cable 400 surrounds the metal core 410, the insulation coating 420 surrounding the metal core 410, the metal shield 450 surrounding the insulation coating 420, and the metal shield 450. It is composed of an insulating jacket 440, and a coating layer 430 surrounding the insulating jacket 440.

Insulating coating 420 and insulating jacket 440 may be formed by an extrusion process, and the material may be as described above.

As described above, the limitation on the characteristics of the coating layer 430 and the insulating jacket 440 is the same as the limitation on the characteristics of the coating layer 130 and the insulating coating 120 in the above embodiment Detailed description will be omitted.

The metal shield 450 is formed by wrapping a plurality of metal core wires on the insulating coating 420 by braiding or spiral shielding or by wrapping a polymer film having aluminum formed on one surface thereof.

As is known in the art, the metal shield 450 prevents electromagnetic waves provided from the outside or makes the impedance constant to reduce losses when an acoustic signal or a video signal is transmitted, and the cable for signal transmission by the metal shield 450. 400 has better electrical performance.

The coating layer 430 on the insulating jacket 440 is formed by impregnating and curing the insulating jacket 440 in the liquid silicone rubber as described above, and through this process, the coating layer 430 is formed on the insulating jacket 440. It is formed by bonding.

The thickness of the coating layer 430 is thinner than the thickness of the insulating jacket 440.

5 shows a cable 500 according to another embodiment of the present invention.

The cable 500 having a circular cross-sectional shape includes an insulating coating 520 which encloses a plurality of

metal cores

511, 512, 513, and

metal cores

511, 512, 513, each having an insulating layer 515 formed on an outer surface thereof. And a coating layer 530 surrounding the insulating coating 520.

As described above, the limitations on the characteristics of the coating layer 530 and the insulating coating 520 are the same as the limitations on the characteristics of the coating layer 130 and the insulating coating 120 in the above embodiment. Detailed description will be omitted.

The metal constituting the

metal cores

511, 512, and 513 may be a single wire or a stranded wire. The outer surface of the single wire or the outer surface of each single wire constituting the stranded wire may be thinly coated with an insulating material such as enamel to form the insulating layer 515. Can be formed. In this case, the

metal cores

511, 512, and 513 may easily maintain electrical insulation with each other by the insulating layer 515, and the flexibility of the cable 500 may be improved.

As the

metal cores

511, 512, and 513, the metal strands made by the various types of single wires may be mixed and used. In this case, at least one of the

metal cores

511, 512, and 513 may be a plurality of known metals. The metal wires that are enameled wires may be twisted together.

Here, one of the

metal cores

511, 512, and 513 may be used for electrical grounding or shielding.

In the above description, the embodiment of the present invention has been described, but various changes can be made at the level of those skilled in the art.

For example, since the above-mentioned metal core, insulation coating and insulation jacket are already commonly known techniques, the description of the metal core, insulation coating and insulation jacket mentioned above is merely an example based on this assumption. Therefore, the present invention should be judged on the basis of this.

Therefore, the scope of the present invention should not be construed as being limited to the above embodiment, but should be interpreted by the claims described below.

Claims

Metal core for electric signal transmission;

An insulating coating having flexibility formed around the metal core; And

It is composed of a coating layer which wraps around the insulating coating, is bonded and cured, and has flexibility and elasticity.

When the insulating coating is impregnated in the liquid polymer mixed with powder and the liquid polymer is cured, the insulating coating surrounds the insulating coating to form the coating layer.

The friction coefficient of the coating layer is less than the friction coefficient of the insulating coating, the hydrophobicity of the coating layer is less tangle characterized in that the greater than the hydrophobicity of the insulating coating.
The method according to claim 1,

Wherein said liquid polymer is synthetic rubber after said hardening.
The method according to claim 2,

The synthetic rubber is a tangle-reduced cable, characterized in that any one of silicone rubber, urethane rubber, olefin rubber or styrene rubber.
The method according to claim 1,

The powder is,

a) at least one selected from a first powder consisting of three-dimensional crosslinked silicone powder, acrylic powder, ceramic powder, fluorine powder and monodisperse polystyrene, or

b) at least one selected from a second powder consisting of mica powder, silica powder, glass powder, graphite powder or alumina powder, or

c) a cable with less tangle, characterized in that it comprises at least one selected from each of said first and second powders.
The method according to claim 4,

The shape of the particles constituting the first powder is a sphere (sphere), and the shape of the particles constituting the second powder is a plate (Flake), characterized in that less cable.
The method according to claim 4,

Cable entanglement is reduced, characterized in that the iron powder (Iron Oxide) or titanium dioxide (Titanium Dioxide) is mixed in the second powder.
The method according to claim 2,

The liquid polymer is a synthetic rubber after the curing,

The light index of refraction of the synthetic rubber is different from the light index of refraction of the second powder, and the cable has reduced entanglement, characterized in that the cable has a gloss due to the difference in the light index.
The method according to claim 1,

The thickness of the coating layer is thinner than the thickness of the insulating layer,

Cable of the tangle resistance is reduced, characterized in that the heat resistance temperature of the coating layer is higher than the heat resistance temperature of the insulating coating.
The method according to claim 1,

The hardness of the coating layer is a cable with reduced tangles, characterized in that higher than the hardness of the insulating coating.
The method according to claim 1,

The metal core is one of a metal single wire, or a plurality of metal wires twisted together twisted metal cable characterized in that any one of the twisted.
The method according to claim 1,

The metal core is composed of a metal single wire having an insulating layer formed by an enamel coating on the outer surface, or a plurality of metal single wires are composed of twisted metal twisted wire, characterized in that the cable is reduced.
The method according to claim 1,

Tangle, characterized in that one said insulating coating wraps one metal core or a plurality of metal cores insulated from each other, or a plurality of said insulating coatings wraps one metal core or a plurality of metal cores insulated from each other Reduced sex cable.
The method according to claim 1,

The metal core is wrapped by an insulation thread (thread), or less tangled cable characterized in that the insulation seal arranged adjacent to the metal core side by side.
The method according to claim 1,

The coating layer is tangle-reduced cable, characterized in that the electrical insulation or electrical semiconducting.
At least one metal core for electrical signal transmission;

An insulation coating having at least one flexibility formed around the metal core;

An insulating jacket having flexibility formed around the insulating coating; And

Wrapped around the insulating jacket and composed of an elastic coating layer having a bonded and cured flexibility,

The insulating jacket is impregnated with a liquid polymer mixed with powder, and the coating layer is formed by being wrapped around the insulating jacket in the process of curing the liquid polymer.

The friction coefficient of the coating layer is less than the friction coefficient of the insulating jacket, the hydrophobicity of the coating layer is less cable tangled, characterized in that greater than the hydrophobicity of the insulating jacket.
The method according to claim 15,

And further comprising a metal shield surrounding said insulation sheath between said insulation sheath and said insulation jacket.
The method according to claim 15

The insulation jacket is formed by continuously extruding over the insulation coating, or a cable to reduce the tangibility, characterized in that the insulation tube manufactured separately.
The method according to claim 17,

And the insulation tube is inserted over the insulation sheath.
The method according to claim 15,

Wherein said liquid polymer is synthetic rubber after said hardening.
The method according to claim 19,

The synthetic rubber is a tangle-reduced cable, characterized in that any one of silicone rubber, urethane rubber, olefin rubber or styrene rubber.
The method according to claim 15,

The powder is,

a) at least one selected from a first powder consisting of three-dimensional crosslinked silicone powder, acrylic powder, ceramic powder, fluorine powder and monodisperse polystyrene, or

b) at least one selected from a second powder consisting of mica powder, silica powder, glass powder, graphite powder or alumina powder, or

c) a cable with less tangle, characterized in that it comprises at least one selected from each of said first and second powders.
The method according to claim 21,

And wherein the first powder is spherical and the second powder is flaky.
The method according to claim 21,

Cable entanglement is reduced, characterized in that the iron powder (Iron Oxide) or titanium dioxide (Titanium Dioxide) is mixed in the second powder.
The method according to claim 21,

The liquid polymer is a synthetic rubber after the curing,

The light index of refraction of the synthetic rubber is different from the light index of refraction of the second powder, and the cable has reduced entanglement, characterized in that the cable has a gloss due to the difference in the light index.
The method according to claim 15,

The thickness of the coating layer is thinner than the thickness of the insulating jacket,

Reduced entanglement, characterized in that the heat resistance temperature of the coating layer is higher than the heat resistance temperature of the insulating jacket.
The method according to claim 15,

The hardness of the coating layer is a cable with reduced tangles, characterized in that higher than the hardness of the insulating jacket.
The method according to claim 15,

And a plurality of the metal cores, wherein the insulation coating wraps or wraps the metal core, respectively, and the insulation jacket wraps the insulation coating at the same time.
The method according to claim 15,

The coating layer is tangle reduced cable, it characterized in that the electrical semiconducting.
The method according to claim 1,

The cable is a tangle-reduced cable, characterized in that the cable for earphones, measuring instrument cable, robot cable or computer cable used to be exposed to the outside.
The method according to claim 15,

The cable is a tangle-reduced cable, characterized in that the cable for earphones, measuring instrument cable, robot cable or computer cable used to be exposed to the outside.
The method according to claim 1,

The coating layer is a tangle-reduced cable, characterized in that to form a bend in a wave shape by repeating rounded mountains and valleys along the circumferential direction.
The method according to claim 15,

The coating layer is a tangle-reduced cable, characterized in that to form a bend in a wave shape by repeating rounded mountains and valleys along the circumferential direction.