KR100687572B1 - Wire type heating element - Google Patents

Abstract

A wire type heating element is provided to have entirely high heating performance by using an oil-based adhesive to firmly adhere carbon on a carbon fiber. In a wire type heating element, a carbon fiber(10) has a carbon coating layer on a surface of the carbon fiber(10). An electrode wire(20) supplies current to the carbon fiber(10). A heating element(30) is woven with a fiber(2) on which carbon is not coated as a horizontal thread or a vertical thread. A protecting layer is formed on a surface of the heating element(30). The carbon coating layer is coated with carbon powder by an oil-based adhesive.

Description

Wire heating element {Wire type heating element}

       1 is a plan view showing an embodiment of the present invention

       Figure 2 is a perspective view of the carbon fiber used in the embodiment

       Figure 3 is a side cross-sectional view of the embodiment

<Description of Symbols for Main Parts of Drawings>

       10. Carbon fiber 20. Electrode wire

       30. Heating element 40. Protective layer

       50. Kink

The present invention relates to a linear heating element, and more particularly, to a linear heating element having a new structure in which the manufacturing process is shortened and thus the cost is lowered, the heat generating performance is excellent, and even a fire occurs.

In general, the linear heating element is a woven fabric woven with a carbon fiber coated with carbon powder on the surface of the synthetic fiber, a synthetic fiber not coated with carbon powder, and an inclined electrode wire for supplying electric current to the carbon fiber. It is produced by coating a resin on the upper and lower surfaces. The linear heating element produced as described above is subjected to a current applied to the carbon fiber as the carbon fiber and the electrode wire cross each other, so that the carbon fiber generates heat.

By the way, the linear heating element woven in this way is because the carbon fiber and the electrode wire simply crosses up and down to contact the carbon fiber and the electrode wire flows during use, so that they do not come in contact and are separated from each other. In this way, if a poor contact occurs between the carbon fiber and the electrode wire, a spark is generated, which may lead to a fire.

On the other hand, the carbon fiber is produced by coating a carbon powder on the surface of the synthetic fiber, when coating the carbon powder using an aqueous adhesive in consideration of the environmental aspects. That is, the carbon powder is mixed with the aqueous adhesive to coat the carbon on the surface of the synthetic fiber. However, synthetic fibers have a migration phenomenon in which components such as a slip agent, a dispersant, and an antioxidant added during manufacture are moved to the fiber surface, and the components are spilled onto the fiber surface, and carbon powder is caused by these components. When coating, the adhesive force of the aqueous adhesive is lowered, which causes a problem that the carbon powder does not adhere well to the fiber. Therefore, in the case of coating the carbon powder using an aqueous adhesive agent, the synthetic fibers were washed with an organic solvent before the coating operation to remove the components spilled onto the fiber surface by migration, and then the carbon powder was coated. In addition, this washing process complicates the overall manufacturing process of the planar smoke, thereby increasing the cost cost of the product.

The present invention is to solve the above problems, the object of the present invention is to reduce the cost by reducing the manufacturing process, it is produced so that the contact failure between the electrode wire and the carbon fiber is not fired due to the poor contact between the electrode wire and the carbon fiber. It is possible to provide a linear heating element of a new structure with excellent safety because there is no possibility of occurrence.

According to the present invention, the carbon fiber 10 having the carbon coating layer 12 formed on the surface thereof is inclined or weft, and the electrode wire 20 and the carbon-free fiber 2 which supply current to the carbon fiber 10 are provided. In the linear heating element comprising a heating element 30 woven with a weft or inclined, and a protective layer 40 formed on the surface of the heating element 30, the carbon coating layer 12 is carbon powder by an oil-based adhesive It is provided with a linear heating element, characterized in that the coating is made.

According to another feature of the invention, the electrode wire 20 is twisted with the other electrode wire 20 to form a twist 50, the carbon fiber 10 is a line characterized in that inserted into the twist 50 A heating element is provided.

According to another feature of the invention, the protective layer 40 is provided with a linear heating element, characterized in that at least one or more of a flame retardant and flame retardant is mixed.

Hereinafter, described in detail through the preferred embodiment of the present invention.

The present invention is a linear heating element formed by coating a protective layer (40) on the surface of a woven heating element (30) woven with the carbon fiber (10) as the weft and the fiber (2) without the carbon coating and the electrode wire (2). to be.

The carbon fiber 10 is a carbon coating layer 12 is formed on the surface of the core fiber 11, the carbon coating layer 12 is a carbon powder is coated with an oil-based adhesive. This oil-based adhesive is made to have a suitable viscosity for coating by mixing the organic solvent and other additives in the synthetic resin. Since components of such an oily adhesive are already known, detailed description thereof will be omitted. Preferably, the oil-based adhesive agent is urethane, acrylic, EVA resin is used alone or mixed with toluene, MEK (methyl ethyl ketone), TCE (trichloroethylene) and the like as a solvent, dispersing agent, antistatic agent, adhesive reinforcing agent, etc. The thing prepared by adding is used. On the other hand, the fibers constituting the core of the carbon fiber 10 is a natural fiber such as cotton or hemp, or mineral fibers such as synthetic fibers or glass fibers.

Since the oil-based adhesive is better in wettability than the water-based adhesive, it is generally superior in adhesive strength to the water-based adhesive. Therefore, when the carbon powder is coated using the oily adhesive, the carbon powder is firmly adhered to the fiber surface, so that the carbon powder is not detached during the production of the heating element. In this way, since the carbon powder is not detached, the heat generating property of the carbon fiber 10 is excellent. In addition, as described above, the synthetic fiber has a migration phenomenon that the additives added during manufacture is moved to the surface and leaked out, since the oil-based adhesive agent has excellent adhesive strength, the synthetic fiber in which the migration phenomenon is generated is carbon fiber ( Even when used as a core material of 10) it is effectively attached to the surface of synthetic fibers. Therefore, it is not necessary to wash the synthetic fibers to be used as the core material before the carbon coating process, such as when using an aqueous adhesive. .

The heating element 30 is woven with the carbon fiber 10 as the weft and the fiber 2 and the electrode wire 20 not coated with carbon inclined. The electrode wire 20 is for applying a current to the carbon fiber 10, preferably a thin, flexible and stretchable braided wire is used. The electrode line 20 is connected to an external power line for supplying power.

Preferably, the electrode wire 20 is disposed to be inclined at the left and right ends of the heating element 30, as shown in the figure, the inclined electrode wire 20 is twisted with the neighboring electrode wire 20 to twist (50) The carbon fiber 10 is inserted into the twist 50. As such, when the carbon fiber 10 is inserted into the twist 50 of the electrode wire 10, the carbon fiber 10 is caught by the electrode wire 20, and thus the carbon fiber 10 is not spaced apart from the electrode wire 20. Since the contact area of the carbon fiber and the electrode wire 20 is widened, there is no fear of contact failure. Although FIG. 1 illustrates that the electrode wires 20 are twisted in pairs with neighboring electrode wires 20, in some cases, the electrode wires 20 are sequentially twisted with other electrode wires 20 to form a twist 50. You may.

A protective layer 40 is formed on the upper and lower surfaces of the heating element 30. The protective layer 40 is formed by coating a synthetic resin. The protective layer 40 is coated only on the surface of the carbon fiber 10 and the electrode wire 20 of the heating element 30 and the fiber 2 used as the inclination, and is formed on the mesh eyes formed by the inclination and weft of the heating element 30. Not coated. Therefore, in the present invention, even after the protective layer 30 is coated, the eye is maintained, and thus ventilation is performed through the eye, such as concrete forming a surface to be constructed by the eye of the heating element 30 during construction of the heating element 30. Since the building material penetrates the heating element 30, the heating element 30 is firmly attached to the surface to be constructed.

Preferably, the protective layer 40 includes a flame retardant and a flame retardant. When the flame retardant and the flame retardant are added to the protective layer 40, even if a fire occurs in the heating element 30, the protective layer 40 prevents a large fire size or a relatively large amount of toxic gases. . As the amount of flame retardant or flame retardant mixed in the protective layer 40 is increased, the flame retardancy of the protective layer 40 is improved, but as the content of the flame retardant and flame retardant is increased, the flame retardant and flame retardant are detached from the protective layer 40 or the protective layer ( Since the adhesive force of 40) may fall and insulation may fall, the mixing amount of the flame retardant and the flame retardant is appropriately adjusted.

As described above, according to the present invention, since the carbon coating layer of the carbon fiber is coated with an oil-based adhesive, unlike the case of using an aqueous adhesive, the fabrication process is not necessary because the fibers to be coated with carbon, particularly synthetic fibers, are not washed before the carbon coating process. Since the cost cost is shortened and the oily adhesive has better adhesive strength than the aqueous adhesive, the carbon is more firmly attached than the carbon fiber coated with the conventional aqueous adhesive. A linear heating element having excellent exothermic performance is provided.

In addition, since the electrode wire 20 forms a twist 50 and has a structure in which the carbon fiber 10 is fitted into the twist 50, the contact form of the carbon fiber 10 and the electrode wire 20 during the use of the product. It is secure and has a wide contact area, so no contact failure occurs. Therefore, there is no risk of fire, so safety is excellent. In addition, when the flame retardant and the flame retardant are mixed in the protective layer 40 coated on the heating element 30, when the fire occurs in the heating element 30, the fire scale is increased or the toxic gas is suppressed. Do.

Claims (3)

The carbon fiber 10 having the carbon coating layer 12 formed on the surface is inclined or inclined, and the electrode wire 20 for supplying electric current to the carbon fiber 10 and the fiber uncoated fiber 2 are insulated or inclined. In the linear heating element including a woven heating element 30 and a protective layer 40 formed on the surface of the heating element 30, the carbon coating layer 12 is characterized in that the carbon powder is coated with an oil-based adhesive. Linear heating element. The linear heating element according to claim 1, wherein the electrode wire (20) is twisted with another electrode wire (20) to form a twist (50), and the carbon fiber (10) is inserted into the twist (50). The linear heating element according to claim 1, wherein at least one of a flame retardant and a flame retardant is mixed in the protective layer (40).

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