KR100817982B1 - Composite for overhead transmission cable and method for preparing thereof - Google Patents

Abstract

A high-molecular composite wire for an overhead transmission cable and a method for preparing the same are provided to maintain thermal stability by low thermal expansion coefficient at a high temperature and prevent the wire from being sagged. A high-molecular composite wire(10) for an overhead transmission cable includes a center wire(11) and external wires(13). The external wires are arranged in parallel to the center wire in a lengthwise direction. The external wires cover the center wire. The external wires are twisted centering on the center wire in a spiral structure. The high-tension center wire is coated with an insulating material. Exteriors of the external wires are wound by a tape made of an insulating resin.

Description

Polymer composite wire for processed transmission line tension wire and manufacturing method thereof {Composite for overhead transmission cable and method for preparing Technical}

The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.

1 is a cross-sectional view of a polymer composite wire for an overhead transmission line tension wire of the union type according to an embodiment of the present invention.

2 is a cross-sectional view of a polymer composite wire for tensile wire of a processed transmission line according to an embodiment of the present invention.

3 is a cross-sectional view of an overhead transmission line using a polymer composite wire for an extension type tension transmission line according to an embodiment of the present invention.

Figure 4 is a flow chart showing a method for producing a fiber-reinforced polymer composite for overhead transmission line tension line of the present invention.

<Description of Major Symbols in Drawing>

10: polymer composite wire 11: center wire

13: outer wire 15: conductor

The present invention relates to a polymer composite wire for an overhead transmission line and a method for manufacturing the same, and more specifically, for an overhead transmission line consisting of a high tension center wire coated with an insulating material and a plurality of external wires arranged to surround the outside of the center wire. In the polymer composite wire, the outer wire is disposed in parallel with the center wire in the longitudinal direction, or the wire is twisted in a spiral manner with the center wire as the central axis, and the outside is wrapped with a taping material made of an insulating resin The present invention relates to a polymer composite wire for an overhead transmission line, and a method of manufacturing the same, having a low thermal expansion coefficient at high temperature, maintaining thermal properties, generating less sag, and having sufficient mechanical strength such as tensile strength and bending characteristics.

Conventional overhead transmission lines have been used aluminum conductor steel reinforced (ACSR) cables incorporating aluminum or aluminum alloy, which is a conductor layer, on the outer circumference of the stranded wire to bear tension. However, since the coefficient of thermal expansion of the stranded wire increases in proportion to the temperature, the ACSR cable as described above causes the stranded wire to sag due to the temperature rise accompanying the increase in power transmission amount (sag phenomenon: sag), and the entire overhead line falls down. Will fall. In preparation for this phenomenon, it is necessary to increase the number of pylons installed in order to construct sufficiently high pylons or to close the gaps between them. However, such an alternative may not be an inherent solution to the problem, and may cause other problems in terms of economy and the like.

According to U.S. Patent No. 6,796,365, a composite for manufacturing a wire in which aluminum is added as a fiber reinforced composite resin is proposed, but this is a problem in which a sag phenomenon occurs more greatly than a polymer composite when applied to a processing transmission due to the large thermal expansion coefficient of the composite. This is being pointed out. In addition, according to International Patent Publication No. WO 03/091008, it is proposed to manufacture a fiber-reinforced composite with a single wire having a large diameter without associating it, but the physical properties such as tensile strength do not satisfy the requirements, and the manufacturing equipment And there is a problem in compatibility due to the complicated process, and because the fiber reinforced composite is manufactured in a single wire having a large diameter without association, it is pointed out that the storage or transportation is not easy.

Accordingly, efforts to solve the above-mentioned problems of the prior art have been continued in the related art, and the present invention has been devised under such a technical background.

The technical problem to be achieved by the present invention is to have a low coefficient of thermal expansion at high temperatures to maintain thermal properties, to generate less sag, to have sufficient mechanical strength such as tensile strength and bending characteristics, and to achieve such technical problems. It is an object of the present invention to provide a polymeric composite wire for a processed transmission line tension wire and a method for manufacturing the same.

To achieve the technical problem to be achieved by the present invention, a polymer composite wire for an overhead transmission line is a high tension center wire coated with an insulating material; And a plurality of external wire rods arranged to surround the outside of the center wire rod, wherein the outer wire is disposed parallel to the center wire in the longitudinal direction, or the central wire rod is a central axis. While being arranged in a twisted manner in a spiral manner, the outside is wrapped with a taping material made of an insulating resin, the center wire and the outer wire, epoxy resin, unsaturated polyester resin, bismalade resin and poly Any one thermosetting resin selected from mid resins; Hardening | curing agents which are liquid as an acid anhydride type or an amine compound; Accelerators which are imidazole compounds or boron trifluoride ethylamine compounds; Mold release agents that are zinc stearate; And a filler comprising nanoclay or short glass fiber.

Epoxy-based resin selected from the thermosetting resin is a di-glycidyl ether bisphenol A epoxy resin, a polyfunctional epoxy resin contained in the content of 70 to 400 parts by weight relative to the weight of the epoxy resin of the di glycidyl ether bisphenol A and It is preferable that it is a mixture of 3 types of epoxy resins containing the di glycidyl ether bisphenol F type epoxy resin contained in the content of 5-25 weight part with respect to the weight of the said di glycidyl ether bisphenol A epoxy resin.

The composite wire rod manufacturing method of the overhead transmission line for achieving the technical problem to be achieved by the present invention, (S1) preparing a high-strength fiber; (S2) treating the surface of the prepared high strength fiber; (S3) completely drying the surface-treated high-strength fibers in a vacuum oven; (S4) impregnating the surface-treated and dried high-strength fibers in the composition for preparing a fiber-reinforced polymer composite for tensile wire of the overhead transmission line; (S5) curing the composition added into the high strength fiber; (S6) cooling the resultant; (S7) coating the wire for the overhead transmission line manufactured by the step of the step with an insulating material to use as a center wire of the polymer composite wire for tensile wire of the overhead transmission line; (S8) using a plurality of wires for processing transmission lines manufactured by proceeding the step as an external wire, the external wire is arranged to face continuously in the longitudinal direction of the center wire while the center wire is audited to the central axis ; (S9) taping the center wire with insulating material for fixing a plurality of external wires; And (S10) curing the insulation coated on the center wire.

Hereinafter, preferred embodiments of the present invention will be described in detail. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the configurations shown in the embodiments described herein are only one of the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, and various equivalents may be substituted for them at the time of the present application. It should be understood that there may be variations and variations.

The present invention has a low coefficient of thermal expansion at high temperatures to maintain stable thermal properties, less sag, sufficient mechanical strength, and has a weight of 20 to 30% of the stranded wire that occupies about 30% of the total weight of the overhead transmission line It is lightweight and features a fiber-reinforced polymer composite that reduces the weight of the entire cable by more than about 20% and reduces the deflection.

In the polymer composite wire for the overhead transmission line of the present invention is a high-strength center wire coated with an insulating material and a plurality of external wire rods arranged to surround the outside of the center wire, in the polymer composite wire for the overhead transmission line tension wire, wherein the outer wire is It is arrange | positioned in parallel with a center wire rod in the longitudinal direction, or it is arrange | positioned in the state twisted in a spiral manner, making the said center wire rod a center axis, and the outside is wrapped with the taping material which consists of insulating resin. The center wire rod and the outer wire rod may include any one of a thermosetting resin selected from an epoxy resin, an unsaturated polyester resin, a bismalade resin, and a polyimide resin; Hardening | curing agents which are liquid as an acid anhydride type or an amine compound; Accelerators which are imidazole compounds or boron trifluoride ethylamine compounds; Mold release agents that are zinc stearate; And a filler which is nanoclay or short glass fiber.

The thermosetting resin may be an epoxy resin, an unsaturated polyester resin, a bismaleade resin or a polyimide, and the like, and particularly preferably an epoxy resin.

It is preferable that the said epoxy resin is a mixture of 3 types of epoxy resins which consist of a di glycidyl ether bisphenol-A epoxy resin, a polyfunctional epoxy resin, and a di glycidyl ether bisphenol F-type epoxy resin. When the three kinds of epoxy resins are mixed and used as described above, the heat resistance is improved as compared with the case of using di-glycidyl ether bisphenol A epoxy resin alone, and it is possible to obtain excellent bending characteristics and flexibility.

The di glycidyl ether bisphenol A epoxy resin may be a compound represented by the following formula (1).

[Formula 1]

The polyfunctional epoxy resin is preferably a glycidyl amine-based or novolak-based compound, and specifically, a compound represented by the following Chemical Formula 2 or Chemical Formula 3 may be used.

[Formula 2]

[Formula 3]

The polyfunctional epoxy resin is preferably included in an amount of 70 to 400 parts by weight based on the weight of the epoxy resin of the di glycidyl ether bisphenol A. In the content range of the polyfunctional epoxy resin, when the lower limit is less than the desired heat resistance can not be obtained is not preferable, when the upper limit is exceeded, the workability is lowered due to increased reactivity, it is difficult to obtain a fully cured cured product, It is not preferable because the physical properties and thermal properties of the cured product are lowered.

The di glycidyl ether bisphenol F epoxy resin may be a compound represented by the following formula (4).

[Formula 4]

In Formula 4, n is 2.

The di glycidyl ether bisphenol F-type epoxy resin is preferably contained in an amount of 5 to 25 parts by weight based on the weight of the epoxy resin of the di glycidyl ether bisphenol A type. In the content range of the di-glycidyl ether bisphenol F-type epoxy resin, if the lower limit is less than the desired flexibility can not be obtained, it is not preferable, and if it exceeds the upper limit, the desired heat resistance can not be obtained is not preferable.

It is preferable that the said hardening | curing agent is liquid as an acid anhydride type or an amine compound.

At this time, the acid anhydride compound selected as the curing agent is methyl tetrahydro phthalic anhydride (MTHPA), tetrahydro phthalic anhydride (THPA) represented by the following formula (5), hexa hydro phthalic anhydride (HHPA ), And Nadic methyl anhydride (NMA) represented by the following formula (6) can be used, and in particular, it is preferable to use methyl tetra hydrophthalic anhydride or nadic methyl anhydride.

[Formula 5]

[Formula 6]

The acid anhydride curing agent is preferably included 70 to 150 parts by weight based on the weight of the thermosetting resin. In the content range of the acid anhydride-based curing agent, if the lower limit is less than the lower limit is not preferable because the heat resistance is lowered by the generation of unreacted epoxy, and if the upper limit is exceeded, the remaining curing agent reacts with the epoxy acts as impurities and heat resistance And lowering physical properties are not preferred.

As the amine compound selected as the curing agent, a cyclo aliphatic polyamine-based or aliphatic amine-based compound may be used. Specifically, the cycloaliphatic polyamine-based compound may be represented by the following formula (7): mentein diamine (MDA) and isopron. And diamine (IPDA). Examples of the aliphatic amine compound include diaminodiphenylsulfone (DDS) and diaminodiphenylmentane (DDM) represented by the following formula (8).

[Formula 7]

[Formula 8]

The amine compound is preferably included in 20 to 50 parts by weight based on the weight of the thermosetting resin. In the content range of the amine compound, when the lower limit is less than the epoxy resin can not be completely cured, it is not preferable, and when the upper limit is exceeded, the remaining curing agent reacts with the epoxy resin as an impurity is not preferable.

When the acid anhydride compound is used as a curing agent, it is preferable to use an imidazole accelerator. When the amine compound is used as a curing agent, it is preferable to use a boron trifluoride ethylamine accelerator.

When the imidazole-based accelerator is selected, the content is preferably included in 1 to 3 parts by weight based on the weight of the thermosetting resin. In the content range of the imidazole-based accelerator, when the lower limit is less than the complete cured cured product is not preferable, and if the upper limit is exceeded, the curing time is shortened at a fast reaction rate and the viscosity is rapidly increased. Poor workability is undesirable.

When the boron trifluoride ethylamine-based accelerator is selected, the content is preferably included in 2 to 4 parts by weight based on the weight of the thermosetting resin. In the content range of the boron trifluoride ethylamine-based accelerator, if the lower limit is less than the complete cured cured product is not preferable, if the upper limit is exceeded, the curing time is shortened by a fast reaction rate if the upper limit is exceeded rapidly Since the viscosity rises, workability is inferior.

The release agent serves to reduce the friction between the product and the molding die to facilitate processing, it is preferable to use zinc stearate (zinc stearate).

The release agent is preferably included 1 to 5 parts by weight based on the weight of the epoxy resin. In the mold release agent content range, when the lower limit is less than the lower workability is not preferable, and when the upper limit is exceeded, there is no particular effect is not preferred.

The filler is used to improve the appearance and strength of the product, it may be used nanoclay, short glass fiber and the like.

When nanoclay is selected as the filler, the content is preferably included in an amount of 1 to 5 parts by weight based on the weight of the epoxy resin, and more preferably in a whisker or flake phase. In the nanoclay content range, when the lower limit is less than the appearance of the wire rod is not good and can not be manufactured to the desired dimensions, it is not preferable, when the upper limit is exceeded, the appearance of the wire rod is not good and workability is deteriorated is not preferable. not.

When short glass fiber is selected as the filler, the content is preferably included in an amount of 5 to 30 parts by weight based on the weight of the epoxy resin, and more preferably boron-free. In the content range of the filler, when the lower limit is less than the desired mechanical properties can not be obtained, it is not preferable, and when the upper limit is exceeded, the workability is lowered due to the viscosity increase of the epoxy composition is not preferable.

The fiber-reinforced polymer composite for an overhead transmission line provided in the present invention is manufactured by sequentially performing the following steps (S1) to (S10) as shown in FIG. 4.

(S1) high strength fiber preparation

This step is to prepare a high-strength fiber, the high-strength fibers may be used, such as glass fibers, carbon fibers, PBD fibers, aramid fibers, basalt fibers or carbon nanofibers.

(S2) surface treatment

This step is a step of treating the surface of the high-strength fibers prepared in step (S1).

The surface treatment may be performed using a coupling solution prepared by dissolving a coupling agent such as titanate, silane, or zirconate in an isopropyl alcohol (IPA) solution, wherein the isopropyl alcohol is used in comparison with the weight of the coupling agent. It can be used at 800 to 1,000 times.

In addition, the surface treatment may be performed by completely immersing the prepared high-strength fibers while maintaining at 70 to 80 ℃, stirring for 30 minutes to 2 hours.

(S3) drying

This step is a step of completely drying the high-strength fibers treated in the step (S2) in a vacuum oven.

The drying is dried using a vacuum oven of 100 ℃ or more, and then stored in direct contact with moisture.

(S4) Impregnated into a composition for preparing a polymer composite

This step is a step of impregnating the high-strength fibers dried in the step (S3) in the composition for producing a fiber-reinforced polymer composite as described above.

Each component of the composition for preparing a fiber-reinforced polymer composite as described above is mixed, maintained at a temperature of 40 to 60 ° C. in order to lower its viscosity, and uniformly mixed using a mechanical stirrer of the composition. . At this time, the stirring speed is maintained at 100 rpm or more, using a vacuum pump during stirring to remove the moisture and bubbles generated during the stirring inside the epoxy. The prepared high strength fiber is impregnated with the thus prepared composition.

The high-strength fibers are impregnated and the amount of the resin is discarded according to the depth immersed in the composition for producing the fiber-reinforced polymer composite. That is, the greater the depth and length of the immersion, the better the impregnation, but the greater the amount of resin discarded when introduced into the die for curing.

Therefore, the depth of the high-strength fibers immersed in the composition for producing the fiber-reinforced polymer composite is preferably 5-7 cm, and the length of the immersed fibers is 50-60 cm.

(S5) hardening

This step is to cure the composition introduced into the high-strength fiber in the step (S4), the curing may be made by applying heat and pressure or ultrasonic waves.

(S6) cooling

This step is a step of cooling the resultant cured in the step (S5), after setting the temperature step by step for the stable and uniform curing of the high-strength fibers, and then rapidly cooled.

(S7) Center Wire Rod Preparation

This step is a step of using as a center wire of the polymer composite wire for the tension line for the overhead transmission line by coating the wire for the overhead transmission line manufactured by the step (S1) to (S6).

Coating of the polymer wire for the overhead transmission line to be used as the center wire may be used an insulating material, such as epoxy coating, polyimide coating, cyanate coating, wherein the epoxy coating used as the insulating material for the coating It is preferable that a viscosity is 3,000-5,000 mPa * s. In the viscosity range of the epoxy-based coating agent, when the lower limit is less than or exceeds the upper limit, it is not preferable because the center wire can not be evenly coated.

(S8) Preparation and placement of external wire rod

This step is to use a plurality of processed wire tensioning polymer wire rods manufactured by the step (S1) to (S6) as an outer wire, the outer wire is the length of the center wire while wrapping the center wire with a central axis It is arranged to face continuously in the direction.

In an embodiment of the present invention, while the six outer wires are wrapped around the center wire rod with six as the center, while the six outer wires are arranged to face continuously in the longitudinal direction of the center wire rod, the number and the center wire rod of the present invention The wrapped shape is not limited to the above embodiment.

(S9) taping

This step is a step of taping for fixing a plurality of external wire rods surrounding the center wire rod in step (S8).

The taping for fixing the outer wire is preferably a tapping material having a heat shrinkage of 20% or more when heat is applied. If the heat shrinkage of the taping is less than 20%, there is a problem that it is difficult to help fix the external wire.

As the type of the taping material, the type is not limited as long as the tape shrinks when heat is applied, and for example, an OPP tape or a PET tape may be used.

(S10) hardening

This step is to cure the insulation coated on the center wire in the step (S9), the temperature is set so that the coated insulation can be cured stably, wherein the taping material shrinks by heat to help the assembly of the wire give.

Hereinafter, a polymer composite wire for an overhead transmission line according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

1 is a cross-sectional view of a polymer composite wire for an overhead transmission line tension wire of the union type according to an embodiment of the present invention. As shown in FIG. 1, the polymer composite wire 10 for an overhead transmission line of a federated type according to an embodiment of the present invention has a central axis 11 and the center wire 11 as a central axis in a spiral manner. It consists of the outer wires 13 arranged in a twisted state.

2 is a cross-sectional view of a polymer composite wire for tensile wire of a processed transmission line according to an embodiment of the present invention. As shown in FIG. 2, the polymer composite wire 10 for an overhead transmission line of an adhesive type according to an embodiment of the present invention is disposed parallel to the center wire 11 and the center wire 11 in the longitudinal direction. It is made of outer wires (13).

In addition, Figure 3 is a cross-sectional view of the overhead transmission line using the polymer composite wire for the tension line of the bonded transmission line according to an embodiment of the present invention. As shown in FIG. 3, the polymer composite wire for the overhead transmission line is located in the center, and the polymer composite wire 10 made of the center wire 11 and the outer wire 13 surrounding the center wire 11 and ; It consists of a conductor 15 surrounding the central wire 11 with the polymer composite wire 10 as a central axis.

The conductor may be aluminum, heat-resistant aluminum alloy and the like.

Each component and a manufacturing method of the polymer composite wire for the overhead transmission line may be interpreted in the same sense as described above.

Hereinafter, in order to help the understanding of the present invention will be described in more detail through preferred examples and comparative examples.

Example 1

The PAN-based carbon fibers were completely immersed in high-strength fibers in a coupling solution prepared by dissolving in an isopropyl alcohol (IPA) solution at a titanate weight of 800 to 1,000 times and then surface treated by stirring for 1 hour. The surface treated high strength fibers were then dried using a vacuum oven at 100 ° C. or higher.

Each component shown in Table 1 below is mixed, maintained at a temperature of 40 to 60 ° C. to lower the viscosity, and uniformly mixed at 100 rpm or more using a mechanical stirrer of the composition. At this time, the stirring speed was maintained at 100 rpm or more. At this time, a vacuum pump was used to remove moisture inside the epoxy and bubbles generated during stirring.

The composition prepared as described above was impregnated to have a soaking depth of 5 to 7 cm and a length of 50 to 60 cm of the dried high strength fiber. Then, the composition added into the high-strength fiber was first cured by applying heat, pressure, and ultrasonic waves, followed by secondary curing by applying heat higher than the first curing, followed by rapid cooling.

The wire rod prepared as described above was coated with an epoxy coating agent having a viscosity of 3,000 to 5,000 mPa · s to prepare a wire rod as a center wire. Six of the wire rods were adopted with the center wire rod as the central axis, and the wire rods were arranged to continuously face in the longitudinal direction of the center wire rod. Then, the tape was taped using OPP tape to fix the six outer wires surrounding the center wire, and then cured to produce a bonded wire composite wire for the overhead transmission line.

Next, the overhead transmission line was manufactured according to a conventional overhead transmission line manufacturing method for covering the surface of the prepared composite transmission line polymeric composite wire with an aluminum conductor.

Examples 2-3 and Comparative Examples 1-6

Except for using the composition and component ratio shown in Table 1 in Example 1 was carried out in the same manner as in Example 1.

The unit of Table 1 is parts by weight relative to the resin a + b + c weight.

나. 고온 인장강도 - 하기 표 3에 나타낸 온도에서 20 분간 방치 후 측정하였으며, 이때 인장속도는 5 ㎜/min으로 하였고, 그 결과는 하기 표 3에 나타내었다.

다. 노화 인장강도 - 하기 표 3에 나타낸 온도에서 1000 시간 동안 방치 후 측정하였으며, 이때 인장속도는 5 ㎜/min으로 하였고, 그 결과는 하기 표 4에 나타내었다.

라. 굽힘특성 - 4점 굽힘 시험법을 이용하여 측정하였으며, 측정속도는 1.3 ㎜/min으로 하였고, 그 결과는 하기 표 5에 나타내었다.

상기 표 2 내지 5에 나타낸 바와 같이, 본 발명에 따른 실시예 1 내지 3의 가공 송전선 인장선용 고분자 복합 선재를 이용하여 제조한 가공 송전선은 상온, 고온 및 노화 인장강도와 굽힘특성이 우수하게 나타남을 확인할 수 있었다. 특히, 충진제로 단척 유리섬유를 사용한 실시예 3의 경우 인장강도는 실시예 1 및 2에 비하여 우수하게 나타났으나, 탄성계수는 다소 증가함을 확인할 수 있었다. 이는 단척 유리 섬유 첨가로 인한 효과라 할 수 있다.
반면, 티타네이트+IPA 용액으로 표면처리하지 않은 것을 제외하고는 실시예 1 및 2와 동일한 조건으로 실험한 비교예 3 및 4의 경우에는 상온, 고온 및 노화 인장강도가 모두 실시예 1 및 2에 비하여 작은 값으로 측정되었다. 이는 고강도 섬유의 표면처리를 한 실시예의 경우 고강도 섬유와 에폭시 수지 간의 계면 특성이 우수하기 때문임을 알 수 있었다.
또한, 다이 글리시딜 에테르 비스페놀 A형 에폭시 수지만을 사용하고, 티타네이트+IPA 용액으로 표면처리한 비교예 5와 다이 글리시딜 에테르 비스페놀 A형 에폭시 수지만을 사용하고, 티타네이트+IPA 용액으로 표면처리하지 않은 비교예 6의 경우 실시예 1 내지 3에 비하여 작은 인장강도를 보였으며, 특히 고온 및 노화 인장특성에서는 그 차이가 더욱 커짐을 확인할 수 있었다. 이는 다관능기 에폭시 수지를 포함하지 않아 내열성이 상대적으로 저하되었기 때문이라 판단되며, 그 중 표면처리하지 않은 고강도 섬유를 사용한 비교예 6의 경우 더 낮은 인장강도를 보임을 알 수 있었다.
상기 실시예 2에서 제조한 중심 선재 및 이를 중심축으로 하여 6 개의 외부 선재로 둘러싸고 있으며, 그 직경이 12.6 ㎛인 집합타입의 복합선재와 상기 실시예 2에 따라 제조된 1개의 단선으로 그 직경이 12.6 ㎛인 선재의 휨 강성지수(bending rigidity) 및 휨 모먼트(bending moment)를 측정하고, 그 결과를 하기 표 6에 나타내었다.
구분 복합 선재 1개 단선 휨 강성지수 (N·㎡) 4.21518×10⁷ 1.5834×10⁸ 휨 모먼트 (N·m) 64.84 243.6 The room temperature, high temperature and aging tensile strength and bending characteristics were measured by the following method using the polymer composite wires for the overhead transmission line prepared in Examples 1 to 3 and Comparative Examples 1 to 6, and the results are shown in Table 2 below. To 5 are shown.
end. Tensile strength at room temperature-The tensile velocity was measured as 5 mm / min, the results are shown in Table 2 below.

I. Tensile strength at high temperature-After standing for 20 minutes at the temperature shown in Table 3, the tensile speed was set to 5 mm / min, the results are shown in Table 3 below.

All. Aging tensile strength-After standing for 1000 hours at the temperature shown in Table 3, the tensile speed was set to 5 mm / min, the results are shown in Table 4 below.

la. Bending characteristics-measured using a four-point bending test method, the measuring speed was 1.3 mm / min, the results are shown in Table 5 below.

As shown in Tables 2 to 5, the processed transmission line manufactured by using the polymer composite wire for the tensioned transmission line of Examples 1 to 3 according to the present invention is excellent in room temperature, high temperature and aging tensile strength and bending characteristics I could confirm it. In particular, in the case of Example 3 using short glass fibers as a filler, the tensile strength was superior to those of Examples 1 and 2, but the elastic modulus was found to increase somewhat. This can be said to be due to the addition of short glass fibers.
On the other hand, in Comparative Examples 3 and 4, which were tested under the same conditions as in Examples 1 and 2, except that the surface was not treated with the titanate + IPA solution, the room temperature, the high temperature, and the aging tensile strength were all used in Examples 1 and 2. It was measured with a small value. This was found to be due to the excellent interfacial properties between the high strength fibers and the epoxy resin in the case of the surface treatment of the high strength fibers.
In addition, using only di-glycidyl ether bisphenol A epoxy resin, Comparative Example 5 surface-treated with a titanate + IPA solution and only di-glycidyl ether bisphenol A epoxy resin, titanate + IPA solution In Comparative Example 6, which was not surface treated, showed a smaller tensile strength than in Examples 1 to 3, and in particular, the difference was higher in high temperature and aging tensile properties. This was judged to be due to relatively low heat resistance because it does not include a polyfunctional epoxy resin, and in Comparative Example 6 using high-strength fibers without surface treatment, the tensile strength was lower.
The center wire manufactured in Example 2 and six outer wires are surrounded by the central axis, the diameter of the aggregate type composite wire having a diameter of 12.6 ㎛ and one single wire manufactured according to Example 2 The bending rigidity and bending moment of the wire rod having a diameter of 12.6 μm were measured, and the results are shown in Table 6 below.
division Composite wire rod 1 disconnection Flexural Stiffness Index (N · ㎡) 4.21518 × 10 ⁷ 1.5834 × 10 ⁸ Bending moment (Nm) 64.84 243.6

As shown in Table 6, the bending stiffness index and the bending moment of the composite wire manufactured in the aggregate type according to the present invention and one high-strength wire having the same diameter were measured. It was confirmed that the more difficult, which means that it is difficult to wind the bobbin, it can be expected that there is a possibility of damage inside / outside the wire rod if forcibly bent.

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As described above, although the present invention has been described by means of a limited embodiment, the present invention is not limited thereto and will be described below by the person skilled in the art and the technical spirit of the present invention. Of course, various modifications and variations are possible within the scope of the claims.

According to the present invention, it has a low coefficient of thermal expansion at high temperatures to maintain thermal properties, less sag, and may have sufficient mechanical strength such as tensile strength and bending characteristics.

Claims (16)

High tensile center wire coated with insulating material; And In the polymer composite wire for the overhead transmission line consisting of a plurality of outer wires disposed to surround the outside of the center wire, The outer wire is disposed parallel to the center wire in the longitudinal direction, or arranged in a spiral manner with the center wire as a central axis, the outside is wrapped with a taping material made of an insulating resin, The center wire rod and the outer wire rod, Thermosetting resins which are epoxy resins or unsaturated polyester resins; Hardening | curing agents which are liquid as an acid anhydride type or an amine compound; Accelerators which are imidazole compounds or boron trifluoride ethylamine compounds; Mold release agents that are zinc stearate; And The coating layer is formed using a composition for preparing a fiber-reinforced polymer composite comprising a nanoclay or a filler that is short glass fiber, The epoxy resin which is the said thermosetting resin, Diglycidyl ether bisphenol A epoxy resin; A polyfunctional epoxy resin, which is included in an amount of 70 to 400 parts by weight based on the weight of the epoxy resin of the di glycidyl ether bisphenol A; And It is a mixture of the three kinds of epoxy resins comprising; di glycidyl ether bisphenol A-type epoxy resin of the di glycidyl ether bisphenol A content of 5 to 25 parts by weight relative to the weight of the epoxy resin Polymer composite wire rod for overhead transmission line. The method of claim 1, The polyfunctional epoxy resin is any one or two or more polyfunctional epoxy resin selected from glycidyl amine and novolac-based polymer composite wire for the overhead transmission line. The method of claim 1, The acid anhydride compound selected as the curing agent is any one selected from methyl tetrahydro phthalic anhydride (MTHPA), tetra hydro phthalic anhydride (THPA), hexa hydro phthalic anhydride (HHPA) and nadic methyl anhydride (NMA) or As a mixture of two or more, the polymer composite wire for a tension line for the overhead transmission line, characterized in that contained in an amount of 70 to 150 parts by weight based on the weight of the epoxy resin. The method of claim 1, The amine-based compound selected as the curing agent is a cyclo aliphatic polyamine-based material or aliphatic amine-based material, 20 to 50 parts by weight based on the weight of the epoxy resin, characterized in that the polymer composite wire for a tension line for the overhead transmission line. The method of claim 4, wherein The cyclo aliphatic polyamine-based material is any one material selected from mente diamine (MDA) and isoprondiamine (IPDA), The aliphatic amine-based material is any one selected from diaminodiphenylsulfone (DDS) and diaminodiphenylmentane (DDM), the composite composite wire for a stretched transmission line. The method of claim 1, When the imidazole-based compound is selected as the accelerator, the polymer composite wire for a tensioned transmission line according to claim 1, wherein the imidazole compound is included in an amount of 1 to 3 parts by weight based on the weight of the epoxy resin. The method of claim 1, When the boron trifluoride ethylamine-based compound is selected as the accelerator, the polymer composite wire for an overhead transmission line tensile wire, characterized in that it is included in an amount of 2 to 4 parts by weight based on the weight of the epoxy resin. The method of claim 1, Zinc stearate selected as the release agent (Zinc stearate) is a polymer composite wire for the tension line of the overhead transmission line, characterized in that it is contained in an amount of 1 to 5 parts by weight relative to the weight of the epoxy resin. The method of claim 1, When nanoclay is selected as the filler, it is included in an amount of 1 to 5 parts by weight based on the weight of the epoxy resin, When the short glass fiber is selected as the filler, the composite wire rod for the overhead transmission line, characterized in that it is contained in an amount of 5 to 30 parts by weight based on the weight of the epoxy resin. (S1) preparing a high strength fiber; (S2) treating the surface of the prepared high strength fiber; (S3) completely drying the surface-treated high-strength fibers in a vacuum oven; (S4) impregnating the surface-treated and dried high-strength fibers in the composition for producing a fiber-reinforced polymer composite according to any one of claims 1 to 9; (S5) curing the composition added into the high strength fiber; (S6) cooling the resultant; (S7) the step of (S1) to (S6) to the step of coating the polymer wire for the wire tension wire prepared by the insulating material to use as a center wire of the composite wire for the overhead transmission line; (S8) using a plurality of processed wire tensioning polymer wire rod manufactured by the step (S1) to (S6) as an outer wire, the outer wire is the length of the center wire while wrapping the center wire with a central axis Disposing continuously in the direction; (S9) taping to fix the plurality of outer wires surrounding the center wire; And (S10) the step of curing the insulating material coated on the center wire; a method for manufacturing a polymer composite wire for a stretched transmission line, characterized in that the progress. The method of claim 10, The high-strength fibers included in the composition for preparing the fiber-reinforced polymer composite of step (S1) may be a mixture of one or two or more selected from glass fibers, carbon fibers, PBD fibers, aramid fibers, basalt fibers, and carbon nanofibers. A method for producing a polymer composite wire for an overhead transmission line. The method of claim 10, The surface treatment of the step (S2), the coupling solution prepared by dissolving in the isopropyl alcohol (IPA) solution of 800 to 1,000 times the weight of any one selected from titanate, silane and zirconate 70 to 70 After fully immersing the high-strength fibers while maintaining at 80 ℃, it is stirred for 30 minutes to 2 hours, the method for producing a polymer composite wire for a composite transmission wire tension line. The method of claim 10, The insulating material used to coat the wire for the overhead transmission line of step (S7) is any one selected from an epoxy-based coating, a polyimide-based coating and a cyanate-based coating, epoxy-based coating used as the insulating material for the coating The viscosity is 3,000 to 5,000 mPa · s, the method for producing a polymer composite wire for tensile wire tensioning wire. The method of claim 10, Taping for fixing the external wire in the step (S9), the method of manufacturing a polymer composite wire for a tension line for the overhead transmission line, characterized in that the heat shrinkage is 20% or more of the taping material when heat is applied. The method of claim 14, The insulating taping material, OPP tape or PET tape, characterized in that any one selected from the group of polymeric composite wire for a transmission line tension wire. delete

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