KR100750874B1 - Manufacturing method for planar resistance heating element - Google Patents

Abstract

The present invention relates to a planar heating element manufacturing method, and more particularly, an ink coating step of obtaining a coated yarn by immersing a polyester yarn in a conductive ink and heating in a heating chamber and then cooling in a cooling chamber; A weaving process of weaving the coated yarn in a transverse yarn, and weaving the braided lines together in the longitudinal direction at both ends of the transverse direction to obtain a planar heating element; A pressing step of passing the planar heating element between the rollers in which the pair is connected and rotated to provide uniformity and flattening of the thickness; A method of manufacturing a planar heating element comprising a coating step of coating a PVC film on both sides of the compressed planar heating element, according to the present invention can exhibit a uniform resistance to electricity in the entire area of the planar heating element, and also heat resistance This excellent planar heating element can be obtained.

Description

MANUFACTURING METHOD FOR PLANAR RESISTANCE HEATING ELEMENT}

1 is a block diagram showing a manufacturing process of the planar heating element according to an embodiment of the present invention.

2 is a process flowchart schematically showing an ink coating process according to an embodiment of the present invention.

3 is a plan view of the planar heating element obtained by the weaving process according to the embodiment of the present invention.

Figure 4 is a process diagram schematically showing a crimping process according to an embodiment of the present invention.

5 is a cross-sectional view of the planar heating element obtained by the coating process according to the embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

3: coated yarn 4: braided wire

10: ink coating process 12: ink chamber

13: heating chamber 14: cooling chamber

20: weaving process 21: planar heating element

30: pressing process 31, 32: roller

40: coating process 41, 42: PVC coating layer

The present invention is an ink coating process for obtaining a coating yarn by coating a conductive ink on the surface of the synthetic fiber yarn; A weaving process of weaving the coated yarn together with the braided wire to obtain a planar heating element; A pressing step of providing uniformity and flattening of the thickness of the planar heating element; It relates to a planar heating element manufacturing method comprising a; coating step of coating a PVC film on both sides of the compressed planar heating element.

In general, the planar heating element is manufactured by various manufacturing processes, for example, by printing a conductive ink on the surface of the flat PET (PET) material and attaching the conductive metal to both ends or mixed coating of the conductive metal yarn to the conductive metal By applying electricity to the heat sink, the heat is generated by the resistance of the conductive material.

However, in general planar heating element, since the conductive ink is not uniformly distributed over the entire area of the planar heating element, it does not exhibit a uniform electric resistance value, which not only has a problem of deterioration in durability due to partial life difference, but also generates heat. The possible temperature is limited, so the range of application is very narrow.

Of course, the planar heating element that can be used at high temperatures (200 ℃ or more) has been introduced, but since they adopt a method of incorporating a material having high heat resistance in addition to the general conductive ink, the manufacturing cost is high, and in addition, various temperatures in one manufacturing facility There was a problem that can not produce a planar heating element that can be used in the range.

In addition, since the electromagnetic wave generated from the planar heating element must be installed separately from the planar heating element, the product can be expensive.

Accordingly, the present invention has been made to solve the above problems, the object of the present invention is to have a uniform thickness and uniform electrical resistance value for the entire area of the planar heating element to extend the endurance life. The present invention provides a planar heating element and a method of manufacturing the same, which can be used at a high temperature with a simple manufacturing method without special additives and can suppress electromagnetic wave generation.

In addition, the present invention has another object to provide a method for producing a planar heating element that can be adjusted to suitably control the usable temperature range of the planar heating element in one manufacturing facility by varying the manufacturing conditions of the planar heating element.

In order to achieve the above object, the present invention, as shown in Figure 1 showing the manufacturing process of the planar heating element, immersed synthetic fiber yarn, preferably polyester yarn in the conductive ink, it is in the range of 100 ℃ to 500 ℃, preferably An ink coating process (10) for obtaining a coated yarn by heating in a cooling chamber equipped with a blower after heating in a heating chamber at 300 ° C., weaving the coated yarn in crosswise and crosswise directions, but using nickel injection alloys at both ends of the transverse direction. Weaving process 20 for weaving the braided wires together in the longitudinal direction to obtain a planar heating element, and a pressing process for passing the planar heating element between the rollers in which the pair is connected to each other to rotate, thereby giving thickness uniformity and flattening of the planar heating element (30). ), And a coating process 40 for coating a PVC film on both sides of the compressed planar heating element.

At this time, it is preferable to perform a gamma ray crosslinking irradiation treatment of the polyester yarn in the process before the ink coating step (10).

Gamma-irradiation treatment technology is known to have the ability to change the chemical bonding structure of the polymer material to a more stable structure or to modify it to desired physical properties without increasing the temperature as a radiation having strong penetrating power. The ester yarn has improved heat resistance and thus has properties that do not combust at high temperatures when applied to a planar heating element.

Hereinafter, preferred embodiments of the above processes will be described in more detail with reference to FIGS. 2 to 5.

Figure 2 is a process flow chart schematically showing the ink coating process according to an embodiment of the present invention, the synthetic fiber yarn forming a planar heating element, as described above it is preferable to take a polyester yarn (1) by gamma-ray crosslinked irradiation improved heat resistance In addition, a process sequence of coating the conductive ink 2 on the outer surface of the polyester yarn 1 is shown in FIG. 2.

As shown in FIG. 2, the polyester yarn 1 withdrawn from the yarn roll 11 first passes through an ink chamber 12 containing a conductive ink 2 after gamma ray crosslinking irradiation treatment (not shown).

The conductive ink 2 contained in the ink chamber 12 is not limited as long as it is a carbon ink having excellent conductivity or the same kind thereof, and a small amount of a curing agent is added to the conductive ink 2 or a diluent is added together with the curing agent. .

When the conductive ink 2 and the curing agent are mixed, it is preferable to mix in a weight ratio of 100: 4, and when further mixing the diluent, the conductive ink, the curing agent, and the diluent are preferably mixed in a weight ratio of 100: 4: 10.

The conductive ink 2 in which the curing agent and / or diluent is mixed is accommodated in the ink chamber 12 having a length L of about 40 cm to 60 cm, and is immersed therein to pass through the polyester yarn 1, At this time, it is preferable that the feed speed of the polyester yarn 1 is in the range of 1 to 2 rpm for the rotational speed of a motor (not shown) for pulling out the polyester yarn 1 from the yarn roll 11.

If the moving speed of the polyester yarn (1) is slower than the speed in the above range, the conductive ink (2) is excessively coated on the polyester yarn (1), on the contrary, if the speed is high, the penetration amount of the conductive ink (2) into the polyester yarn (1) This is because the planar heating element manufactured under such conditions is poor in heat generation because of the small amount.

Hereinafter, for convenience of description, the polyester yarn 1 coated with the conductive ink 2 will be referred to as a coated yarn 3.

As described above, the coated yarn 3 obtained by passing through the ink chamber 12 passes through the heating chamber 13 in which the heater 13a is mounted.

The internal temperature of the heating chamber 13 is in the range of 100 ° C to 500 ° C to heat the conductive ink 2 adhered to the surface of the polyester yarn 1, having heat resistance as in the object of the present invention. In order to manufacture the planar heating element, the internal temperature of the heating chamber 13 is maintained at 300 ° C. or more, and the length of the heating chamber 13 is maintained so that the residence time of the coated yarn 3 in the heating chamber 13 is 15 seconds to 20 seconds. Design it.

The coating yarn 3 passing through the heating chamber 13 passes through the cooling chamber 14 in which the fan 14a is mounted, and the conductive ink 2 heated in the heating chamber 13 is cured. The temperature of 14 is maintained at room temperature or about 10 ° C to 30 ° C.

Through this process, the coating yarn 3 coated with the conductive ink 2 on the surface of the polyester yarn 1 can be obtained, for example, the coating is performed in a state in which the temperature in the heating chamber 13 is 300 ° C. If the yarn 3 is manufactured, the coated yarn 3 has heat resistance that can be used at 300 ° C or lower.

Therefore, by appropriately adjusting the temperature conditions of the heating chamber 13, it is possible to produce a planar heating element having different heat resistance, which is produced by the production under the appropriate conditions according to the purpose and purpose of use of the planar heating element to rise through overproduction The cost can be prevented.

As described above, the coated yarn 3 that has passed through the cooling chamber 14 is wound around the take-up roll 15 and then introduced into the weaving step 20, which is the next step.

Since the weaving process 20 may use a general weaving machine, a detailed description thereof will be omitted, and FIG. 3 shows a plan view of the planar heating element obtained by the weaving process according to the embodiment of the present invention.

3 is a planar heating element 21, the polyester yarn 1 and the coated yarn 3 is woven in the weft (lateral direction) and inclined (longitudinal), that is, the inclined polyester as shown in FIG. The yarn 1 is used, and the weft yarn (the transverse direction) is a weaving of 1: 1 alternating between the polyester yarn 1 and the coated yarn 3.

The braided wire 4 is woven in the longitudinal direction at both transverse ends of the planar heating element 21. For example, according to the enlarged view of FIG. 3, the coated yarn 3 and the polyester yarn in the transverse direction are formed. (1) and the polyester yarn 1 of the longitudinal direction are mutually in close contact, and the lateral | coated yarn 3 and the braided wire 4 are woven in the form which mutually interlocks.

The braided wire 4 is made by twisting a thread made of nickel injection alloy, and one side and the other braided wire 4 of the planar heating element 21 alternate with the coated yarn 3 in the longitudinal direction, respectively. It is preferable to weave 10 strands, but the weaving form is not limited to the illustrated example, but may take various forms, and the planar heating yarn 3 may be used if the planar heating element 21 is not used at high temperature. And polyester yarn (1) can also be alternately woven in a ratio of 2: 1.

In the planar heating element 21 manufactured as described above, a positive electrode is connected to one braided line 4 and a negative electrode is connected to the other braided line 4 so that both electrodes are electrically connected to each other. Seems.

4 is a process diagram schematically showing a pressing process according to an embodiment of the present invention, since the planar heating element 21 woven as shown in FIG. 3 has many crying parts during the weaving process so that it has a uniform plane with respect to the entire area. For this purpose, it is preferable to perform the pressing process 30 for passing the rollers 31 and 32 which are paired in series and pressurized and rotated as shown in FIG. 4.

The planar heating element 21 passed through the compressed rollers 31 and 32 serves to evenly spread and disperse the crying portion at a predetermined portion.

FIG. 5 is a cross-sectional view of a planar heating element having a PVC coating layer formed by a coating process according to an embodiment of the present invention, wherein the planar heating element 21 which has undergone the above-described pressing process 30 has PVC resins attached to both sides thereof, respectively. The coating layers 41 and 42 are formed, and the PVC coating layers 41 and 42 are manufactured in the form of a film by thermocompression bonding, or the planar heating element 21 is dried in a liquid PVC resin to be dried. The general method may be used, and in addition to PVC, there is no particular limitation as long as it is a synthetic resin having a flexible material such as PE and monolium.

In addition, as shown in FIG. 4, the positive electrode is connected to one side of the braided line 4 and the negative electrode is connected to the other side of the braided line 4 to generate heat from the planar heating element 21 due to electrical resistance. Can be used where required, since the planar heating element 21 itself emits a large amount of electromagnetic waves due to leakage current, etc., it is preferable to perform the following process to remove this.

That is, the conductive ink 2 is applied to the surface of any one PVC coating layer 41 in the thickness range of 0.01mm to 1mm, and the wire 5 such as copper is coated on the conductive ink 2 at regular intervals. The front end of the wire 5 is grounded on one strand of the braided wire 4 to which the (-) pole is connected, and then the PVC coating layer 43 is formed thereon.

This coating process effectively blocks the electromagnetic waves generated from the planar heating element 21 due to the wire 5, and can be suitably used in many fields such as clothing, bedding, flooring, industrial machinery, etc. according to the set temperature of the heating chamber. Can be.

As can be seen from the above description, the planar heating element obtained by the manufacturing method of the present invention can generate heat at an even temperature over the entire area because the conductive ink is distributed in a uniform thickness and quantity with respect to the entire area of the planar heating element. In addition, there is an advantage that the durability can be improved, and furthermore, since the generation of electromagnetic waves is suppressed in the planar heating element itself without the need for a separate electromagnetic shielding means in addition to the planar heating element to block the electromagnetic wave, the usability can be further expanded. .

In addition, it is easy to change the working conditions such as the temperature and the transfer speed in the heating chamber, so that it is possible to manufacture a planar heating element suitable for the purpose, which can be produced in the same process to produce a planar heating element having various allowable temperature range It is possible to manufacture at an appropriate cost according to the purpose of use with the effect of improving the manufacturing cost can be prevented from being wasted.

Claims (8)

An ink coating process in which a gamma ray crosslinked polyester yarn passes through an ink chamber containing conductive ink and is heated in a temperature controllable heating chamber and then cooled in a cooling chamber to obtain a coated yarn, and the coated yarn is woven together with a polyester yarn. But weaving process to obtain a planar heating element by weaving so that the braided wire connecting the (+) and (-) electrodes in the longitudinal direction, respectively, in the transverse both ends, and a pair of the planar heating element in connection with the roller to press and rotate When passing through the coating process and the flexible resin film coated on both sides of the compressed planar heating element, and the conductive ink is applied to one side and the predetermined wire is laid on it to form a synthetic resin layer with flexibility again, the Manufacture of planar heating element, which includes a coating process in which the electric wire is grounded to the braided wire to which the (-) pole is connected. Law. The method according to claim 1, The heating temperature of the heating chamber is in the range of 100 ℃ to 500 ℃, the residence time in the heating chamber is a planar heating element manufacturing method, characterized in that 15 seconds to 20 seconds. The method according to claim 1, The rotational speed for drawing the polyester yarn from the yarn roll is in the range of 1 to 2rpm, the length of the ink chamber is 40cm to 60cm characterized in that the planar heating element manufacturing method. The method according to claim 1, Cooling temperature of the cooling chamber is a planar heating element manufacturing method characterized in that the room temperature or 10 ℃ to 30 ℃ range. The method according to claim 1, Incorporating a curing agent into the conductive ink, the mixing ratio of the conductive ink and the curing agent is a planar heating element, characterized in that the ratio of 100: 4 weight. The method according to claim 1, Incorporating a curing agent and a diluent in the conductive ink, wherein the mixing ratio of the conductive ink, the curing agent, and the diluent is 100: 4: 10 weight ratio, respectively. The method according to claim 1, The coated yarn is a method of producing a planar heating element, characterized in that weaving alternate with polyester yarn. The planar heating element, which is prepared according to any one of claims 1 to 7.

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