KR20150142167A

KR20150142167A - Electric wire of fire retardant using carbon fiber

Info

Publication number: KR20150142167A
Application number: KR1020140070457A
Authority: KR
Inventors: 김규진
Original assignee: 김규진
Priority date: 2014-06-11
Filing date: 2014-06-11
Publication date: 2015-12-22

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant electric wire using carbon fiber, more particularly, to a flame-retardant electric wire using carbon fiber which can prevent the deterioration by heat as well as maintaining the shape of a wire, will be.
The flame-retardant electric wire using the carbon fiber according to the present invention is formed by spirally winding a bundle of carbon fibers along an outer surface of an insulator provided to surround a conductor at an inner center thereof, and a coating material is coated on the outside of the bundle of carbon fibers .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a carbon fiber-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant electric wire using carbon fiber, more particularly, to a flame-retardant electric wire using carbon fiber which can prevent the deterioration by heat as well as maintaining the shape of a wire, will be.

Generally, wires are widely used to transmit power and communication signals. In recent years, materials for transmitting optical signals, such as optical fiber cables, have also been developed and widely used. Hereinafter, the optical fiber cable is also referred to as a wire cable of the same concept. In particular, a cable made by bundling several bundles together to form a bundle and covering the bundle together is widely used particularly for a large capacity and a long distance.

The cable cable becomes more dependent on the fact that the power amount of the electric power to be transmitted and the signal amount of the electric signal are very large, and reliability becomes very important accordingly. Furthermore, it is very important to protect these cables from fire and other disasters.

In case of a fire, when the covering material of communication or transmission cable is carbonized and peeled off, the contents inside the covering material, that is, the core material is exposed to the fire and is not protected from the flame. Thus, when the covering material of the cable is peeled off by fire and the shielding layer and the insulating layer, which are the contents of the inside of the cable, are burnt, there is a risk that the conductor as a core material is exposed and short-

Especially, when the cable is an optical cable, the optical cable includes a high-volatility light jelly which is located around the optical fiber and is easily burned, so that the flame retardancy of the optical cable is particularly important in case of fire. Optical jelly of optical cable is a kind of mineral oil because it is a kind of mineral oil and it is a substance with strong flammability. Therefore, it is difficult to extinguish the fire when the fire occurs, and toxic gas may be generated at the time of combustion.

An example of a technique for solving such a problem is disclosed in Document 1 below.

The following Patent Document 1 describes a coaxial distribution cable. A plurality of conductor layers and insulating layers which are concentrically arranged on the outer circumferential surface of the inner coating layer alternately and arranged alternately; and a plurality of conductor layers and insulating layers alternately arranged on the outer circumferential surface of the inner coating layer, And an outer coating layer that protects and insulates the conductor layer and the insulating layer.

Such a conventional coaxial distribution cable can prevent the increase of the resistance by suppressing the temperature rise of the distribution cable by forcibly circulating the cold air through the hollow tube installed at the center of the cable, It is possible to prevent an accident such as an overload or an electric shock.

However, since the above-described conventional techniques can not sufficiently protect electric wires or optical fibers from flames or the like that occur during a fire, the necessity for development of electric wires for protecting electric wires or optical fibers is still high.

Korean Patent Registration No. 10-0328352 (registered on Feb. 28, 2002)

SUMMARY OF THE INVENTION An object of the present invention is to provide a flame retardant electric wire using carbon fiber which can greatly improve the flame retardant performance of a wire by using a carbon fiber bundle as an inner covering material. have.

In order to achieve the above object, a flame-retardant electric wire using carbon fiber according to the present invention comprises a carbon fiber bundle formed by spirally winding a bundle of carbon fibers along an outer surface of an insulator provided to surround a conductor, Is covered with a covering material.

As described above, the flame retardant electric wire using the carbon fiber according to the present invention has the effect of preventing short-circuit or short-circuit by preventing the propagation of the flame by using the carbon fiber as the inner covering material and protecting the electric wire from the flame.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a flame retardant electric wire using carbon fiber according to the present invention. FIG.
2 and 3 are cross-sectional views showing another example of a flame-retardant wire using carbon fiber according to the present invention.
4 is a cross-sectional view showing another example of a flame-retardant wire using carbon fiber according to the present invention.

The flame-retardant electric wire using carbon fiber according to the present invention is formed by spirally winding a bundle of carbon fibers along an outer surface of an insulator provided to surround a conductor at an inner center thereof, and a coating material is coated on the outside of the bundle of carbon fibers .

The outer surface of the carbon fiber bundle wound around the insulator is wound with a tape selected from a polypropylene (PP) tape, a polyester (PS) tape, a copper tape, and an aluminum tape.

And a plurality of insulating composites formed by winding a plurality of insulators by the carbon fiber bundle.

Further, the surface of the carbon fiber bundle is coated with any one selected from magnesium hydroxide, aluminum hydroxide, and calcium hydroxide.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view showing a flameproof wire using carbon fiber according to the present invention, FIGS. 2 and 3 are cross-sectional views showing another example of a flameproof wire using carbon fiber according to the present invention, Sectional view showing another example of the flame-retardant electric wire using the carbon fiber according to the present invention.

As shown in FIG. 1, a flame-retardant wire using carbon fiber according to the present invention includes a carbon fiber bundle 3 formed of bundles along the outer surface of an insulator 2 provided to surround a conductor 1 at an inner center thereof And the outer surface of the carbon fiber bundle 3 is coated with the covering material 4. [

The conductor 1 may be made of any one of copper or nickel, or an alloy thereof, but is not limited thereto and may be made of another conductor.

The insulator 2 is made of a resin such as polyethylene or foamed polyethylene. Particularly polyethylene has a good dielectric constant and functions as a preferable insulator. When a high frequency signal passes through a conductor, the signal size is reduced due to the insulator. Thereby improving the high-frequency characteristics.

The carbon fiber bundle 3 is formed by bundling a plurality of strands of carbon fibers into a spiral shape. By forming the spiral winding as described above, it is possible to block airtightness such as waterproof and to prevent the propagation path of the flame from moving along the electric wire during the fire.

The carbon fiber bundle 3 is preferably formed so as to enclose the insulator 2 in a completely closed state for a flame retardant effect.

Carbon fiber is a fiber made by heating and carbonizing organic fiber under anaerobic conditions. It has a structure in which the molecular arrangement and crystal changes according to the raw material and treatment temperature, and the hexagonal rings of carbon form continuous layered lattice. It is colored or gray.

In addition, carbon fiber is a material that is lighter than metal, superior in strength and elasticity, superior in heat resistance, impact resistance, and chemical resistance than metal, since molecules such as oxygen, hydrogen,

In carbon fiber, more than 95% of the principal component is composed of carbon, and because of the high density of materials such as metal, fiber type carbon can exert a high effect on reinforcing polymer matrix.

The manufacturing process of the carbon fiber can be divided into a stabilization step after carbonization treatment, a carbonization step and a graphitization step in which a flame retardant is added to the precursor fiber.

The physical properties of carbon fiber vary depending on various factors such as heat treatment temperature, temperature increase rate, temperature rise step, chemical treatment of fiber surface and inert gas applied during stabilization process and carbonization process. During the process, chemical and physical The change is mainly affected by the stabilization process, and when exposed to the high heat treatment temperature in the carbonization process, the stabilization process determines whether the carbon fiber can maintain a chemically and physically stable structure.

The cover material 4 is an outermost cover for protecting the insulator 2 and the carbon fiber bundle 3 including the conductor 1 from external injury or corrosion and is also referred to as a sheath layer and is made of a polyethylene resin, , Polypropylene, and polyester resin.

As shown in FIGS. 2 and 3, a plurality of insulating composites 6 formed by winding a plurality of insulators 2 by the carbon fiber bundles 3 can be covered.

A plurality of insulators 2 are wound in a spiral fashion using a carbon fiber bundle 3 to form an insulated composite 6 and a plurality of insulated composites 6 are formed to cover the insulator 4, It is possible to prevent deterioration due to heat even when a plurality of insulators 2 are formed.

Particularly, a space between the insulating composites 6 is filled with a separate filler material A to maintain the shape of the electric wire. The filler material A may be carbon fiber, nonwoven fabric, nylon, or the like.

4, one of tapes selected from a polypropylene (PP) tape, a polyester (PS) tape, a copper tape, and an aluminum tape is laminated on the outside of the carbon fiber bundle 3 wound around the insulator 2, (5).

This is to prevent the carbon fiber bundle 3 wound on the insulator 2 from being loosened and maintain its shape, and to improve the insulation performance by separating the carbon fiber bundles 3 from each other.

On the other hand, the surface of the carbon fiber bundle 3 may be coated with any one material selected from magnesium hydroxide, aluminum hydroxide, and calcium hydroxide.

The magnesium hydroxide, aluminum hydroxide, calcium hydroxide and the like are preferably used in the most densely packed combination of large-diameter particles and small-diameter particles.

This is because, when the small diameter particles are used singly, there is a problem in the mixing process of the composition. In the case where the large diameter particles are used alone, problems arise during handling of the material and the incombustible Can be reduced. It is preferable that the large diameter particles have an average particle diameter of 50 to 200 mu m and the small diameter particles have an average particle diameter of 1 to 30 mu m.

Thus, various improvements are achieved in terms of flame retardancy by using magnesium hydroxide, aluminum hydroxide and calcium hydroxide each having a different particle diameter and packing the densest.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many obvious changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention should therefore be construed in light of the claims set forth to cover many of such variations.

1: Conductor
2: Insulator
3: carbon fiber bundle
4: Cover material
5: tape
6: Insulation composite

Claims

A carbon fiber bundle (3) consisting of a bundle of bundles is spirally wound along an outer surface of an insulator (2) provided to surround a conductor (1) at an inner center thereof, and a covering material (4 ) Is coated with a carbon fiber.

The tape manufacturing apparatus according to claim 1, wherein one of tapes (5) selected from a polypropylene (PP) tape, a polyester (PS) tape, a copper tape and an aluminum tape is attached to the outside of the carbon fiber bundle (3) wound around the insulator ). The flame retardant electric wire using the carbon fiber.

A flame-retardant electric wire (1) according to claim 1 or 2, wherein a plurality of insulating composites (6) formed by winding a plurality of insulators (2) by the carbon fiber bundles (3) .

The flame-retardant wire according to claim 1, wherein the surface of the carbon fiber bundle (3) is coated with any one material selected from magnesium hydroxide, aluminum hydroxide, and calcium hydroxide.