KR101797439B1 - Epoxy insulator and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an epoxy insulator and a manufacturing method thereof. The manufacturing method of an epoxy insulator comprises: (A) a step of preparing an epoxy resin which is a main ingredient, a hardener, and a filler; (B) a step of composing the main ingredient, the hardener, and the filler at prescribed proportions and then firstly mixing the main ingredient, the hardener, and the filler to make a liquid mixture; (C) a step of secondly mixing the liquid mixture; (D) a step of deaerating the liquid mixture; (E) a step of preheating the liquid mixture; (F) a step of injecting the liquid mixture into a forming mold with a support fitting mounted thereon while applying heat at a low temperature; (G) a step of heating a temperature of the forming mold to perform forming and hardening treatments to manufacture an epoxy insulator; and (H) a step of separating the epoxy insulator. According to the present invention, a high-quality epoxy insulator can be produced while improving functionality such as electric insulation, heat resistance, and durability, and an epoxy insulator applicable to various purposes such as outdoor purposes can be provided.

Description

[0001] EPOXY INSULATOR AND MANUFACTURING METHOD THEREOF [0002]

The present invention relates to an epoxy insulator and a method of manufacturing the same, and more particularly, to an epoxy insulator capable of improving electrical insulation, heat resistance, durability, and other functional properties and producing high-quality insulators, and a method of manufacturing the same.

An insulator is an insulator used to insulate and mechanically hold or support a wire or a bare wire portion of an electric device. The insulator is used for an electric wire such as a suspending insulator, a distribution wire for a pin insulator, Breakers / lightning strikes and so on.

The insulator includes a support metal member made of a metal material and an insulator made of an insulative material that surrounds the support metal member. The insulator may have an outer surface in a smooth shape and may have a corrugated shape And may have various shapes depending on the purpose of use.

In constructing the insulator, an epoxy resin may be used in order to take advantage of advantages such as electrical insulation and excellent dimensional stability. The product constituting the insulator by using the epoxy resin is called an epoxy insulator, .

As described above, conventional epoxy insulators, which are mainly used for indoor wiring and lightning, are weak in electric insulation, heat resistance, durability, and the like, and there is a need for improvement thereof.

Further, in the past, when the conductor is overloaded due to a contact with a ship or other foreign matter which may be generated between conductors supported by epoxy insulators, it is difficult to detect and check the conductor, so that an accident caused by a short circuit or an overload can not be prevented.

Korean Patent Publication No. 10-2004-0097110 Korean Patent Publication No. 10-2002-0060469

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above-mentioned problems of the prior art, and provides an epoxy insulator capable of improving electrical insulation, heat resistance and durability, It has its purpose.

The present invention provides an epoxy insulator and method of manufacturing the same that can confirm the heat resistance state of the insulator when installed and used, and prevent an accident caused by an overload that may occur in a supporting conductor have.

According to an aspect of the present invention, there is provided an epoxy insulator comprising: a metal support metal; And an insulator made of an insulating material, which is formed integrally with the support metal and is an outer body of the insulator and includes an epoxy resin as a main body, the insulator being a mixture of a main epoxy resin and a curing agent Lt; / RTI > The above-mentioned subject may be any one selected from the group consisting of a bisphenol A epoxy resin, a novolak epoxy resin, a flame retardant epoxy resin and an isocyanate epoxy resin either singly or in combination of two or more thereof; The curing agent may be at least one selected from the group consisting of metaphenylenediamine (MDP), diaminophenylmethane (DDM), diaminodiphenylsulfone (DDS), methylnadic anhydride (NMP), pyromellitic acid anhydride (PMDA), methyltetrahydroacid anhydride , Or a mixture of two or more of them.

Here, the insulator is made of a mixture of a main epoxy resin and a curing agent mixed therewith and a filler added thereto; As the filler, any one selected from the group consisting of titanium oxide, polyimide, pigment, aconitril styrene acrylate (ASA) and a pH adjusting agent may be used alone or in combination of two or more.

In the case of using the pigment as the filler as described above, it is possible to make the color display on the epoxy insulator by using the zeotropic pigment and change the color depending on the temperature, and the heat resistance state of the epoxy insulator It can be configured so that it can be simply checked.

According to another aspect of the present invention, there is provided a method for manufacturing an epoxy insulator comprising the steps of: (A) providing an epoxy resin, a curing agent, and a filler; (B) mixing the above-mentioned subject, a curing agent and a filler in a predetermined composition ratio and then mixing them at a high temperature for 3 hours and 10 minutes at a temperature of 120 ± 10 ° C while mixing them at a high temperature; (C) subjecting the liquid mixture that has undergone the primary mixing step to secondary mixing while heating at a low temperature for 1 hour and 10 minutes at a temperature of 30 ± 5 ° C; (D) performing a deaeration treatment in a vacuum to remove air or foam from the liquid mixture through the secondary mixing step; (E) preheating the liquid mixture after the defoaming step at a temperature of 60 ± 5 ° C for 5 hours and 10 minutes; (F) injecting the liquid mixture after the pre-heating step into a molding die equipped with a support metal, so that the liquid mixture does not solidify during the injection, at a temperature of 30 ± 5 ° C, an injection rate of 150 to 200 ml / Injecting heat while applying heat thereto; (G) After completion of the injection step, the temperature of the mold is heated and molded and cured to produce an epoxy insulator having a support metal and an insulator integrated therein. The epoxy insulator is cured at a temperature of 180 to 190 DEG C for 7 to 10 minutes ; (H) desorbing the surface of the epoxy insulator produced through the step (G) to remove surface oils and foreign substances.

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In the step (B), 20 to 100 parts by weight of a curing agent for the curing reaction is added to and mixed with 5 to 20 parts by weight of a filler for increasing the functionality, based on 100 parts by weight of the epoxy resin as a main component. The above-mentioned subject may be any one selected from the group consisting of bisphenol A epoxy resin, novolak epoxy resin, cycloaliphatic epoxy resin, flame retardant epoxy resin, hydantoin epoxy resin and isocyanate epoxy resin, Are mixed and used; The curing agent is selected from the group consisting of metaphenylenediamine (MDP), diaminophenylmethane (DDM), diaminodiphenylsulfone (DDS), methylnadic anhydride (NMP), hexahydroanhydride (HHPA), pyromellitic anhydride ), And methyltetrahydroacid anhydride may be used alone, or two or more of them may be used in combination; The filler may be selected from the group consisting of silica, titanium oxide, polyimide, pigment, acrylonitrile styrene acrylate (ASA), and pH adjusting agent, either singly or in combination.

In the case of using the pigment as the filler as described above, it is possible to make the color display on the epoxy insulator by using the zeotropic pigment and change the color depending on the temperature, and the heat resistance state of the epoxy insulator It can be configured so that it can be simply checked.

According to the present invention, it is possible to produce an epoxy insulator which can produce an epoxy insulator of good quality while improving its electrical insulating properties, heat resistance and durability, and can be applied to a variety of applications including indoors and outdoor.

In the present invention, when the epoxy insulator is installed and used, the color of the insulator changes according to the temperature state applied through the support metal. The heat resistance state of the product can be easily checked and checked without using a temperature sensor or the like And it is possible to prevent the accident caused by the overload that may occur in the conductor supported by the insulator, thereby achieving the usefulness.

Figs. 1 and 2 are views showing an embodiment of a general epoxy insulator.
3 is a schematic manufacturing process diagram for illustrating an epoxy insulator manufacturing method according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

1 and 2, the epoxy insulator 100 according to the embodiment of the present invention includes a support metal member 110 made of a metal and an insulator 120 made of an insulating material, .

The support bracket 110 may be formed of a variety of metal brackets, depending on the application, and may be provided with a fastening hole or a through hole having a screw thread therein.

The insulator 120 is made of epoxy resin so as to cover the support bracket 110 buried therein to exert its main function of support and insulation.

The insulator 120 may be formed of a body having various shapes depending on the intended use such as indoor wiring or lightning, and it may have a smooth outer surface or a corrugated outer surface to enhance the dielectric strength.

In particular, the insulator 120 may be composed of a base and a curing agent, and may include a filler for exhibiting a function.

The insulator 120 is made of epoxy resin, and the amount of the curing agent may be 20 to 100 parts by weight based on 100 parts by weight of the epoxy resin.

It is preferable that the filler is added in an amount of 5 to 20 parts by weight based on 100 parts by weight of the epoxy resin, which is a subject, for the purpose of exhibiting the function.

The insulator 120 can improve functionalities such as electrical insulation, mechanical strength, and heat resistance by using the insulator 120 in the composition ratio of the main component, the curing agent, and the filler so that the curing reaction can be performed well. Can produce.

As the subject epoxy resin, any one selected from the group consisting of a bisphenol A type epoxy resin, a novolac type epoxy resin, a flame retardant epoxy resin and an isocyanate type epoxy resin may be used singly or in combination of two or more.

The bisphenol A type epoxy resin can impart electrical insulation, chemical resistance, dimensional stability, and the like. The Novolac type epoxy resin can impart excellent heat resistance and chemical resistance, and the flame retardant epoxy resin Can impart flame retardancy and heat resistance, and the isocyanate-based epoxy resin can impart excellent heat resistance.

Examples of the curing agent include an aromatic diamine such as metaphenylindianamine (MDP), diaminophenylmethane (DDM), and diaminodiphenylsulfone (DDS) in order to obtain excellent curing reaction, excellent mechanical properties, And acid anhydrides such as methylnadic anhydride (NMP), pyromellitic acid anhydride (PMDA) and methyltetrahydroacid anhydride can be applied to obtain excellent curing reaction, heat resistance and weather resistance.

At this time, the aromatic diamine or the acid anhydride may be used alone or in a mixture of two or more selected from the listed types.

As the filler, any one selected from titanium oxide, polyimide, pigment, and aconitril styrene acrylate (ASA) may be used singly or in combination of two or more.

Here, the titanium oxide and polyimide can increase the durability such as mechanical strength, and the pigment can give a hue, and the acrylonitrile styrene acrylate (ASA) can enhance heat resistance and weather resistance.

The polyimide may impart properties such as electrical insulation, chemical resistance, and moldability as well as mechanical strength.

The filler may be used in the form of a pH adjusting agent or a separate additive. The reaction between the raw material and the raw material may be induced during molding and curing by preventing the acidification of the mixture from being induced and basicized.

At this time, as the pH adjusting agent, borax, citric acid, citric acid, acetic acid, glycolic acid and the like may be used. Of these, any one selected from these may be used alone or two or more kinds thereof may be mixed have.

In addition, when a pigment is used as the filler, a temperature sensitive pigment such as a temperature sensitive pigment can be applied. Through the application of a sionic pigment, coloring can be performed on the epoxy insulator 100, And it is possible to provide an advantage of simply checking the heat resistance state of the epoxy insulator 100 through the color change according to the temperature response.

Accordingly, when the epoxy insulator 100 is installed and used, the color of the insulator 120 changes according to the temperature state applied through the support bracket 110, so that the heat resistance state according to the use of the product can be easily And it is possible to provide an advantage such that an accident due to an overload which may occur in a supporting conductor can be prevented beforehand.

As shown in FIG. 3, the manufacturing method for producing the epoxy insulator 100 according to the embodiment of the present invention may include a step S1 including a raw material, a first mixing step S2, a second mixing step S3, a defoaming step S4, a preheating step S5, an injection step S6, a molding and curing step S7, and a desorption step S8.

The step of providing the raw material (S1) is a step comprising an epoxy resin, a curing agent and a filler, which are the main ingredients.

Herein, the filler may not be used as an additional raw material in the production of the epoxy insulator 100, and only a base and a curing agent may be used.

The above-mentioned epoxy resin may be a bisphenol A epoxy resin, a novolak epoxy resin, a cycloaliphatic epoxy resin, a flame retardant epoxy resin, a hydantoin epoxy resin, an isocyanate epoxy resin, or the like.
Here, the cycloaliphatic epoxy resin, which is not described in the above-described composition of the epoxy insulator, can increase the outdoor use and durability of the epoxy insulator, and the hidene phosphorus epoxy resin has excellent heat resistance, The arc resistance can be imparted.

The curing agent is selected from the group consisting of metaphenylenediamine (MDP), diaminophenylmethane (DDM), diaminodiphenylsulfone (DDS), methylnadic anhydride (NMP), hexahydroanhydride (HHPA), pyromellitic anhydride ), Methyltetrahydroacid anhydride, and the like.

The filler may be silica, titanium oxide, polyimide, pigment, acrylonitrile styrene acrylate (ASA), pH adjusting agent and the like.

At this time, borax, citric acid, citric acid, acetic acid, glycolic acid and the like may be used as the pH adjusting agent.
Here, the silica not described in the above-described composition of the epoxy insulator can enhance the insulating property by the excellent heat resistance and moisture removing property.

Herein, some examples of the above-mentioned subject matter, the hardener and the filler are described in the description of the preferred embodiment, but the present invention is not limited thereto, and may be applied to various other applications.

The primary mixing step (S2) is a step of mixing the raw materials including the main component, the hardener and the filler in a certain component ratio, and then mixing the raw materials while heating at a high temperature to prepare a liquid mixture.

At this time, in order to make the raw materials to be mixed react with each other to some extent during the primary mixing step (S2) and to be able to exhibit moldability in the molding and curing step (S7), a temperature of 120 占 폚 It is preferable to perform the mixing treatment for 3 hours and 10 minutes.

Here, 20 to 100 parts by weight of a curing agent for the curing reaction may be added to 100 parts by weight of the epoxy resin, and when the filler is added for the purpose of increasing the functionality, 5 to 20 parts by weight may be added .

For example, bisphenol A type epoxy resin can be used as a base material when electrical insulation, chemical resistance and dimensional stability are required when an epoxy insulator is manufactured, and when excellent heat resistance is required, an isocyanate type epoxy resin can be used, When outdoor use and durability are required instead of indoors, cycloaliphatic epoxy resin may be used. Any one of them may be used selectively, or two or more types may be mixed.

In the case of the above-mentioned curing agent, in order to obtain excellent curing reaction and excellent mechanical properties and electrical insulation, any one of aromatic diamines such as mephenylenediamine (MDP), diaminophenylmethane (DDM) and diaminodiphenylsulfone (NMP), hexahydro-anhydride (HHPA), pyromellitic acid anhydride (PMDA), and the like can be used in combination of two or more of them. In order to obtain excellent curing reaction, heat resistance and weatherability, ), Methyltetrahydro acid anhydride, and the like, or may be used in the form of mixing two or more kinds thereof.

In the case of the filler, silica may be used for excellent heat resistance and insulating property, pigments may be used for imparting color, and acronitryl styrene acrylate (ASA) may be used to enhance heat resistance and weather resistance, A pH adjuster may be used to induce acidification and induction of acidification and to induce the reaction between the raw materials during molding and curing more effectively. In addition, a chelate pigment may be used when the pigment is added. Or a mixture of two or more species.

The second mixing step (S3) is a second mixing step in which the liquid mixture that has undergone the first mixing step (S2) is heated again at a low temperature.

At this time, it is preferable that the liquid mixture after the primary mixing step (S2) is mixed and treated at a temperature of 30 ± 5 ° C for 1 hour and 10 minutes in order to achieve more uniform mixing without solidification.

The defoaming step S4 is a step of defoaming to remove air or foam from the liquid mixture after the second mixing step S3.

At this time, it is preferable to perform the degassing treatment in a vacuum state, and in order to increase the degassing efficiency, the degassing treatment is preferably performed at a vacuum condition of 3.5 to 5 Torr for 5 to 30 minutes.

The preheating step S5 is a preheating step at a predetermined preheating temperature for injecting the liquid mixture after the defoaming step S4 into a forming mold for a mold working.

At this time, the preheating treatment is preferably performed at a temperature of 60 ± 5 ° C for 5 hours and 10 minutes for moldability and excellent curing reaction.

The injecting step S6 is a step of injecting the liquid mixture in the preheated state after the preheating step S5 into the forming metal mold in which the supporting metal is mounted, while applying heat at a low temperature.

At this time, it is preferable to inject the preheated liquid mixture at an injection rate of 150 to 200 ml / sec at a temperature of 30 ± 5 ° C to allow the liquid mixture to be injected without being hardened during the injection process Do.

In the forming and curing step S7, after the injection step (S6) is completed, the temperature of the molding die in a state where the support metal is mounted is heated and molded and cured to produce an epoxy insulator in which the support metal and the insulator are integrated .

At this time, during the molding and curing treatment, it is preferable to perform molding and curing at a temperature of 180 to 190 ° C for 7 to 10 minutes in order to increase efficiency due to moldability and curing reaction depending on the raw material.

The desorption step S8 is a step of removing the surface oil and foreign matter from the epoxy insulator manufactured to have a predetermined shape through the molding and curing step S7.

Accordingly, in the present invention, it is possible to improve the functionality such as electrical insulation, heat resistance, and durability through the organic bonding structure in which the above-described steps are sequentially performed, and it is possible to produce a high quality epoxy insulator. In addition, Can be produced.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. May be made, which will be within the technical scope of the present invention.

100: Epoxy insulator
110: Support bracket
120: Insulator
Step S1:
S2: primary mixing step
S3: Secondary mixing step
S4: Deaeration step
S5: Preheating step
S6: injection step
S7: Molding and curing step
S8: Tally step

Claims (7)

delete delete Metal support metal; And an insulator made of an insulating material which is formed integrally with the support metal and constitutes an outer body of the insulator and includes an epoxy resin as a main body, wherein the insulator comprises a mixture of a main epoxy resin and a curing agent for curing reaction ≪ / RTI > The above-mentioned subject may be any one selected from the group consisting of a bisphenol A epoxy resin, a novolak epoxy resin, a flame retardant epoxy resin and an isocyanate epoxy resin either singly or in combination of two or more thereof; The curing agent may be at least one selected from the group consisting of metaphenylenediamine (MDP), diaminophenylmethane (DDM), diaminodiphenylsulfone (DDS), methylnadic anhydride (NMP), pyromellitic acid anhydride (PMDA), methyltetrahydroacid anhydride , Or a mixture of two or more of them is used; Wherein the insulator is made of a mixture of a main epoxy resin and a curing agent mixed therewith, and a filler added thereto, wherein the filler is selected from titanium oxide, polyimide, pigment, aconitril styrene acrylate (ASA) In the epoxy insulator in which one kind is used singly or two or more kinds are used in combination,
When a pigment is used as the filler, the color of the epoxy insulator is changed by using a zeotropic pigment, and the color of the epoxy insulator is changed depending on the temperature. Thus, the heat resistance of the epoxy insulator is simply checked Wherein the epoxy resin is composed of an epoxy resin. A method of manufacturing an epoxy insulator for manufacturing an epoxy insulator having a metal support member and an epoxy resin insulator,
(A) an epoxy resin, a curing agent and a filler;
(B) mixing the above-mentioned subject, a curing agent and a filler in a predetermined composition ratio and then mixing them at a high temperature for 3 hours and 10 minutes at a temperature of 120 ± 10 ° C while mixing them at a high temperature;
(C) subjecting the liquid mixture that has undergone the primary mixing step to secondary mixing while heating at a low temperature for 1 hour and 10 minutes at a temperature of 30 ± 5 ° C;
(D) performing a deaeration treatment in a vacuum to remove air or foam from the liquid mixture through the secondary mixing step;
(E) preheating the liquid mixture after the defoaming step at a temperature of 60 ± 5 ° C for 5 hours and 10 minutes;
(F) injecting the liquid mixture after the pre-heating step into a molding die equipped with a support metal, so that the liquid mixture does not solidify during the injection, at a temperature of 30 ± 5 ° C, an injection rate of 150 to 200 ml / Injecting heat while applying heat thereto;
(G) After completion of the injection step, the temperature of the mold is heated and molded and cured to produce an epoxy insulator having a support metal and an insulator integrated therein. The epoxy insulator is cured at a temperature of 180 to 190 DEG C for 7 to 10 minutes ;
(H) desorbing the surface of the epoxy insulator prepared in step (G) to remove surface oils and foreign substances; ≪ / RTI > delete 5. The method of claim 4,
In the step (B), 20 to 100 parts by weight of a curing agent for curing reaction is added to and mixed with 5 to 20 parts by weight of a filler for enhancing functionality, based on 100 parts by weight of the epoxy resin as a main component.
The above-mentioned subject may be at least one selected from the group consisting of bisphenol A type epoxy resin, novolak type epoxy resin, cycloaliphatic epoxy resin, flame retardant epoxy resin, hydantoin epoxy resin, isocyanate type epoxy resin, Or more;
The curing agent is selected from the group consisting of metaphenylenediamine (MDP), diaminophenylmethane (DDM), diaminodiphenylsulfone (DDS), methylnadic anhydride (NMP), hexahydroanhydride (HHPA), pyromellitic anhydride PMDA) and methyltetrahydroacid anhydride are used alone, or a mixture of two or more thereof is used;
Wherein the filler is one selected from the group consisting of silica, titanium oxide, polyimide, pigment, aconitril styrene acrylate (ASA), and a pH adjuster, either singly or in admixture of two or more. Way. The method according to claim 6,
When a pigment is used as the filler, the color of the epoxy insulator is changed by using a zeotropic pigment, and the color of the epoxy insulator is changed depending on the temperature. Thus, the heat resistance of the epoxy insulator is simply checked Wherein the epoxy resin is prepared so as to be capable of forming an epoxy resin.

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