KR101960279B1 - Manufacturing Method of Sheet Type Heating Element for Reducing Heating and Sheet Type Heating Element Prepared Therefrom - Google Patents

Abstract

The present invention relates to a method for producing a planar heating element having reduced heat generation and a planar heating element produced therefrom, wherein the method for producing the planar heating element comprises the steps of: a) applying silver paste; b) C) the step of piercing the attachment region of the heat paper and the copper tape; d) the step of pressing the attachment region around the perforation; e) the step of fusing the epoxy; and f) the step of fusing the PET film The surface heat generating element manufactured by the above manufacturing method is arranged in such a manner that a plurality of perforations are maintained at a constant interval at a bonding site of the heat generating paper and the copper tape, Is formed in a structure that is firmly pressed toward the heating sheet, and thus, a plurality of pores formed at the joining portion of the heat generating paper and the copper tape together with the application of the silver paste, The amount of heat generated around the copper tape can be reduced substantially and efficiently even when the electric current is maintained for the surface heating element by presenting the spacing adjustment value (value), thereby reducing the occurrence of fire that can be caused in the surface heating element. A method of manufacturing a heating element and a planar heating element manufactured from the method.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of producing a planar heating element having reduced heat generation and a planar heating element produced therefrom,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a planar heating element having reduced heat generation and a planar heating element manufactured therefrom. More particularly, the present invention relates to a method of manufacturing a planar heating element, And a surface heating element having a reduced heat generation that does not cause a fire which can be caused from the periphery of the copper tape of the surface heating element even when the electric current is maintained for the surface heating element, and a surface heating element manufactured from the surface heating element .

Conventionally, a conductive carbon paste is used as a heat source. Since such a conductive carbon paste is manufactured by mixing various binders and conductive powder in order to impart continuous conductivity to spherical carbon black, a DC heating element is manufactured It is difficult to manufacture a heating element having a low resistance value. The volume resistivity of the carbon paste may be, for example, 500 OMEGA / cm, and the volume resistivity upon printing and impregnation may be 40 OMEGA / cm ≥ 25 mu m. The heating element to which such a conductive carbon face is applied has a short life span due to oxidation and deterioration of the organic binders contained in the paste when the heating is prolonged for over 80 ° C.

Particularly, the conductive carbon paste is formed by, for example, a method of impregnating and coating weave fabrics. In the impregnating method, a poly yarn or a cotton yarn is woven in a grid shape, then impregnated with a carbon ink, The conductive carbon paste is produced in such a manner that the conductive carbon paste is coated with the insulating material and the cost of the cotton cloth which is the base material for fixing the carbon fluid causing heat generation is high and the amount of the adhesive insulation to the upper and lower insulating sheets The thickness is thick, resulting in an increase in price, and there is a difficulty in small-scale production.

On the other hand, in the coating weaving method, carbon yarn coated with a conductive compound and a carbon ink on the surface of a poly yarn is twisted into thousands of strands, and the carbon yarns are arranged in a predetermined shape, The conductive carbon paste is coated or adhered to the conductive carbon paste. As a result, the heat source is in the form of a line, so that it has the same heat generation characteristics as the existing heat ray, and the quality is different according to the carbon ink coating technology and equipment specifications , There is a risk of local overheating and fire hazard due to hot spots in some short circuits because they are twisted to tens of strands for resistance control.

As described above, in the field of film heaters in particular, carbon-impregnated heating elements lead the market, but the quality of the products is not stabilized. In addition, since the area heat generating element can not reduce its own heat generation even when the electric current is maintained, fire in the area heat generating body is frequently occurring.

That is, since the electric resistance heat generated at the joint portion between the copper tape and the heating pad of the conventional plane heating element, fires of the plane heating element are frequently generated.

Particularly, as a method for reducing the fire to such an area heating element, a registered trademark 10-1813685 filed by the applicant of the present invention (" a method of manufacturing a surface heating element and a surface heating element manufactured therefrom ") has been disclosed.

However, even in the above-mentioned registered patent, it is possible to reduce the fire of the surface heating element simply by forming the perforations at the joint portion of the heating paper and the copper tape. Specifically, it is possible to reduce the heat generated by itself during the electric conduction maintenance of the surface heating element And it does not provide the actual essentials to do so.

On the other hand, the patent documents disclosed in the following prior art documents can be referred to as techniques relating to surface heat generation.

Patent Document 001: Patent Application No. 10-2015-0159281 Patent Document 002: Patent Application No. 10-2016-0183585 Patent Document 003: Patent Application No. 10-2013-0093265 Patent Document 004: Patent Application No. 10-2012-0055888 Patent Document 005: Patent Application No. 10-2016-0081464 Patent Document 006: Patent Application No. 10-2014-0044393 Patent Document 007: Registration No. 10-1813685

The present invention for solving the above-mentioned problems is to provide a surface heating element having an exothermic reduction capable of minimizing heat generation caused by the periphery of a copper tape when electric current is maintained on the copper tape of the surface heating element, And a planar heating element manufactured from the method.

In order to accomplish the above-mentioned objects, the present invention provides a method of coating a silver paste by spraying a silver paste using a micro-atomizer on the heat-generating paper and the attaching portion of the copper tape, Pressing and attaching the heat-generating paper and the adhered portion of the copper tape by using a plate-type pressure plate positioned in the up-down direction for the airtight attachment of the copper tape and the heating paper evenly coated with the silver paste B) piercing the heating paper with a perforated needle located in the up and down direction along the attachment point of the heat paper and the copper tape; c) And an inner peripheral wall of the perforations punctured by the perforation needle together with the attaching portion of the heat paper and the copper tape, And d) a pressing step for attaching the perimeter of the perforation to the portion of the copper tape bonded to the upper surface of the heat paper by the perforation, using the thermocompression plate positioned above and below the perforation, F) fusing of the epoxy, and fusing the PET film to the site of the epoxy using the thermal press plate positioned above and below the epoxy, f) fusing the PET film, There is a feature in a method of manufacturing a heating element.

The silver paste in the step (a) of silver paste is characterized in that it is a conductive resin composed of a silver powder, an acrylic resin and a low-boiling organic solvent mixed, and is a method for producing an area heating element having an exothermic reduction.

The piercing needle in the piercing step with respect to the attachment point of the heating paper and the copper tape may be constituted by a pointed portion and a close contact plate or may be constituted by a pointed portion, a round portion and a close contact plate, And the rounded portion induces the perforated portion of the copper tape that has been pierced by the pointed portion to be opened, and the tightening plate causes the perforated portion of the opened copper tape to move in the direction of the bottom surface of the heating paper And a heat generating reduction in which the lower surface of the heating sheet is pressed and joined to the bottom surface of the heating sheet while being guided to be folded.

Wherein the inflation fins are inserted into the perforations in the compression step with respect to the attachment region in the vicinity of the perforation, and pneumatic pressure is injected into the inflated resin formed along the periphery of the inflation fins, Which is expanded and pressed in such a manner that the inner circumferential surface of the perforation of the copper tape is pressed toward the inner peripheral wall of the perforation of the heat generating paper.

E) the epoxy in the step of fusing the epoxy is filled up to the inside of the perforation of the copper tape so that the perforation inner circumferential surface of the copper tape is firmly pressed toward the perimeter inner wall of the heat generating paper by the epoxy And a method of manufacturing a planar heating element having reduced heat generation.

And c) perforations of the copper tape and the heating paper, which have been perforated through the perforating step of the attachment point of the heating paper and the copper tape, are perforated at intervals of 10 mm each other.

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As described above, according to the present invention, the manufacturing method includes the reflection of the silver paste on the surface heating element, the reflection of the silver content, and the adjustment of the perforation and perforation interval, thereby reducing the heat generation of the surface heating element, The present invention has the effect of effectively manufacturing the planar heating element for the effect and also the manufacturing cost of the functional planar heating element which is prevented from the fire due to the reduction of the heating can be drastically reduced.

Further, according to the present invention, since the silver paste is applied to the manufacturing method, excellent conductivity of the surface heat emission element and adhesion of the heat generation paper and the copper tape can be further improved.

Further, according to the present invention, the application of silver paste to the surface heating element, the reflection of the silver content, and the interval between the perforation and the perforation can remarkably reduce the heat generation compared with the conventional surface heating element.

In addition, according to the present invention, there is an effect of drastically reducing the generation of fire which may be caused in the peripheral portion of the copper tape as the heat generation of the surface heating element is reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual block diagram showing a process sequence relating to a method of manufacturing a planar heating element having an exothermic reduction according to the present invention;
Fig. 2 is a conceptual process diagram showing the step of attaching the heating tape and the copper tape shown in Fig. 1, b)
Fig. 3 is a conceptual process drawing showing a step of piercing the attaching portion of the heat paper and the copper tape shown in Fig. 1,
4 is a conceptual view showing a state in which a copper tape is perforated by a perforation needle on a copper tape in the process of drilling step c)
FIG. 5 is a conceptual view showing a state in which a perforation needle enters a perforated portion of a copper tape under a heating sheet after the process shown in FIG. 4;
FIG. 6 is a conceptual view showing a state in which a punched hole of a copper tape is attached under a heating sheet after the process shown in FIG. 5 in a state of being folded in the direction of a heat paper while spreading by the penetration of a perforation needle;
FIG. 7 is a conceptual process diagram showing the pressing step for the attachment region around the perforation shown in FIG. 1 d)
FIG. 8 is a cross-sectional view showing a state in which the expanding resin is expanded by the air expansion while the expansion pin formed in the compression plate is inserted into the perforation of the copper tape in the process of the compression step with respect to the attachment region around the perforation shown in FIG. 7 Fig. 7 is a plan view showing the state of pressurizing and pressing the inner peripheral wall,
Fig. 9 is a conceptual process diagram showing the step of fusing epoxy, e) shown in Fig. 1,
Fig. 10 is a conceptual view showing the planar heating element in a state where e) the step of fusing the epoxy is completed,
11 is a conceptual process diagram showing the fusing step of f) PET film shown in Fig. 1,
Fig. 12 is a conceptual view showing the finished surface heating element in a state in which the fusing step of the PET film shown in Fig. 11 is completed;
Fig. 13 is a cross-sectional view of the planar heating element shown in Fig. 12, which is a conceptual sectional view showing the separation of a PET film and an epoxy,
FIG. 14 is a conceptual drawing for understanding the temperature change trends at T1 to T4 as temperature measurement sites for each point of the planar heating element,
15 is a graph for easily grasping an average temperature, a standard deviation, a difference in difference, and the like for temperature measurement according to the content of silver paste in the surface heating element,
16 is a graph for easily grasping the average temperature, the standard deviation, the difference in difference, and the like for the temperature measurement according to the presence or absence of punching in the surface heating element,
17 is a graph for easily grasping an average temperature, a standard deviation, a difference in difference, and the like for the temperature measurement according to the application of the silver paste to the surface heating element and the punching interval.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It is to be interpreted that the scope of the present invention encompasses the scope of the technical idea covering the entire specification in consideration of the modification in various other ways.

The method for manufacturing a planar heating element having an exothermic reduction according to the present invention and the planar heating element manufactured therefrom will be described in detail below with reference to the accompanying drawings.

As shown in Fig. 1, a method of manufacturing a planar heating element having reduced heat generation according to the present invention includes the steps of: a) applying a silver paste; b) attaching a copper tape to a heating pad; c) A step of piercing the attachment region of the perforation, d) a pressing step of the attachment region around the perforation, e) a fusion step of epoxy, and f) a fusing step of the PET film.

a) Of silver paste  Application step

The silver paste application step a) refers to a process of applying a silver paste to the attachment site of the heating paper 10 and the copper tape 20 for adhesion. Of course, the silver paste may be applied to both the heating paper 10 and the copper tape 20, and in some cases, the silver paste may be applied to any one of the heating paper 10 and the copper tape 20 . ≪ / RTI >

For uniform application of the silver paste, it is preferable to use a liquid form of silver powder and adopt a spraying method instead of a spraying method. Thus, the silver paste can be sprayed evenly through the use of a micro dispenser (not shown).

The silver paste may be a conductive resin composed of, for example, a silver powder mixed with an acrylic resin and a low-boiling organic solvent, and a conductive film is formed by evaporation of the organic solvent to generate conductivity. The drying time of the silver paste is, Lt; RTI ID = 0.0 > 12 hours. ≪ / RTI >

Such silver paste can be expected to have an excellent conductivity and an effect of improving the adhesion between the heating paper 10 and the copper tape 20.

b) With heating paper Of copper tape  Attachment step

The step b) of attaching the heat paper to the copper tape means the step of attaching the copper tape 20 to the heating paper 10 to which the silver paste is uniformly applied. Plate type pressure plates 100 and 100 'may be used as shown in FIG. 2 for airtight attachment between the heat generating paper 10 and the copper tape 20. FIG.

The pressing plates 100 and 100 'press the heating sheet 10 and the copper tape 20 in a state of pressing the heating sheet 10 and the copper tape 20 in the upward and downward directions with cylinder power, (20) can be airtightly attached to each other.

c) With heating paper Of copper tape  Perforation step for attachment site

The step (c) is a step of perforating the thermal paper 10 and the copper tape 20 along the attachment site. A perforator may be used for the perforation of the attachment region of the heat paper 10 and the copper tape 20. [

3, the perforation needles 200 and 200 'used as the perforator are pierced in the upward direction and the downward direction of the heat paper 10 and the copper tape 20, 4, the pointed portion 210 may be tapered, for example, from the copper tape 20 to the heat paper 10 (see FIG. 4) And the adhesive tape 220 can be pressed and bonded to the upper surface of the heat paper 10 by, for example, closely contacting the copper tape 20 with the upper surface of the heat paper 10.

5 and 6, the piercing needle 200 'may include a pointed portion 210', a round portion 220 ', and a contact plate 230'. The pointed portion 210 ' The round portion 220 'serves to guide the copper tape 20 that has been punched by the pointed portion 210 of the perforated needle 200 to be opened, and the round portion 220' And the tightening plate 230 'serves to guide the copper tape 20 folded in the lower direction of the heating paper 10 to the heating paper 10 10) to be press-bonded.

Of course, a plurality of perforations (PH) can be formed at the attachment sites of the copper tape 20 and the heating paper 10 through the joining or attachment of the perforations, And it is characterized by the fact that it is punctured at regular intervals.

That is, it is preferable that the perforations (PH) have a size of 1 to 1.5 mm, which contributes to the maintenance of the average temperature of the surface heaters. Particularly, when the interval between the perforations (PH) Temperature can be maintained. The size of the perforations (PH) and the spacing between the perforations (PH) reduce the heat of the surface heating element and can act as factors for reducing the fire significantly.

d) the step of squeezing the attachment site around the perforation

The squeezing step on the attachment part in the vicinity of the d) d) refers to the step of pressing the inner peripheral wall of the perforation (PH) together with the attachment part of the heat paper 10 and the copper tape 20.

Compression of the attaching portion of the heating paper 10 and the copper tape 20 and pressing of the perforation (PH) against the inner peripheral wall are performed by pressing the expansion pins 301a (300, 300 ') composed of the flat plate-shaped pressing plates (300, 300').

The expansion pins 301a further include an expansion resin 301b coupled to the outer periphery of the expansion pins 301a and protrude in a predetermined arrangement pattern on the compression plates 300 and 300 ' 8, it expands in the direction of the inner circumferential wall of the perforation (PH) as shown in Fig. 8, and the perforated portion of the copper tape 20 is extended to the perforated portion (not shown) of the heat paper 10 As shown in Fig.

Since the flexible tape 301 is airtightly attached to the peripheral wall of the perforation (PH) of the heating paper 10 to the inner circumferential surface of the perforation (PH) of the copper tape 20 through the inflated resin 301b expanded by the air pressure, The contact resistance between the copper tape 20 and the heat generating paper 10 can be further reduced so that the heat generated by the copper tape 20 and the heat generating paper 10 Can be reduced, which can reduce a fire that is frequently generated in the vicinity of the copper tape 20 as a result.

e) Epoxy Fusion step

The step (e) of fusing the epoxy means the step of fusing the epoxy 30 or 30 'to the portion of the copper tape 20 bonded to the upper surface of the heat paper 10 by punching.

9, the epoxy 30 and the epoxy 30 'are bonded together with the upper surface of the copper tape 20 through the thermal pressing plates 400 and 400' in the up and down direction of the copper tape 20, 10, the epoxy 30 or 30 'is welded to the inside of the perforation (PH) of the copper tape 20 as shown in FIG. 10 during the fusion process of the epoxy 30 or 30' And is filled in the form to be filled.

When the epoxy 30 or 30 'is filled up to the inside of the perforation PH of the copper tape 20, the perforated (PH) portion of the copper tape 20 is also covered with the epoxy 30, Due to the effect of reducing the contact resistance with respect to the attachment region of the copper tape 20 and the heat generating paper 10 by the structure in which the copper tape 30 'is firmly pressed toward the peripheral wall of the perforation (PH) of the heat generating paper 10, The heat generated by the bonded portion between the copper tape 20 and the heating paper 10 is reduced even when the electric current is maintained by the surface heat generating element 1 and the generation of fire frequently caused around the copper tape 20 is significantly reduced have.

f) Fusion step

The step f) fusing the PET film refers to a step of fusing the PET film 40 or 40 'to the upper surface of the epoxy 30 or 30'.

The PET films 40 and 40 'may be bonded to the epoxy 30 (see FIG. 11) through the thermal pressurizing plates 400 and 400' positioned above and below the epoxy 30 and 30 ' 30 ').

That is, the PET films 40 and 40 'are fused to the upper surface of the epoxy 30 and 30', and the epoxy 30 and 30 ', the copper tape 20 and the heat paper 10 Thereby protecting the bonding state from the outside.

On the other hand, the planar heating element 1 manufactured through the above-described manufacturing method has a structure in which the heating paper 10, the copper tape 20, the epoxy 30, and the PET film 40 Film type surface heating element made of a combination constitution.

For example, the heating paper 1 may be a paper in which a carbon fiber and a pulp are mixed, but it is not limited thereto, and the epoxy 30 may be used, Polyurethane can be used, and the use of the PET film 40 is also preferable. However, it is not limited to the use of PE (polyethylene).

In the present invention, the surface heat emission element 1 having a reduced heat generation is characterized in that a large number of perforations P are formed. Based on the configuration of the perforations P, the heat generation of the surface heat emission element 1 itself is reduced The occurrence of a topic can be remarkably reduced.

The heat generating paper 10 and the copper tape 20 are bonded to each other through a silver paste, and the heat generating paper 10 is heat- 13, a copper tape 20 may be formed toward the width or the longitudinal direction of the paper 10, and a plurality of punched holes P may be formed at regular intervals.

The perforation (P) of the heat generating paper 10 may be bonded to the upper surface and the lower surface of the heat generating paper 10 in the form of wrapping the copper tape 20, The silver paste (silver paste) can be used for bonding.

In the state where the copper tape 20 is airtightly bonded to the inner circumferential surface of the perforation P of the heating paper 10, the epoxy 30 and the copper paper 30 ' (30) is hermetically sealed up to the upper and lower surfaces of the cavity (20) as well as to the perforation (P). At this time, the epoxy (30) The epoxy 30 and the epoxy 30 'may be bonded together in such a manner that heating and pressing are simultaneously applied. Furthermore, the PET films 40 and 40 'may be bonded to the upper and lower surfaces of the epoxy 30 and 30', respectively.

Particularly, since the copper tape 20 can be firmly and hermetically contacted with the inner peripheral surface of the perforation P in a manner that the copper tape 20 is folded to the perforated (P) portion, There is an advantage that a separate adhesive is not necessary.

Since the copper tape 20 folded to the perforation P region is wrapped by the melted epoxy 30 or 30 'by heating and pressing, it can be structurally supported firmly, ) And the copper tape 20 can be further reduced.

As the various embodiments of the planar heating element of the present invention through the tables described below, it is possible to identify reasons for reducing the electrical contact resistance to the planar heating element and to explain the reasons for significantly reducing the occurrence of the fire by reducing the heat generation of the planar heating element Lt; / RTI >

T 1, T 2, T 3 and T 4 disclosed in the following tables are obtained by applying electrical current to the copper tape 20 of the surface heating element as shown in FIG. 14, and then heating the surface heating element at a certain specific point And the temperature that is changed at each point is measured. This can be referred to FIG.

That is, in order to grasp the temperature change of each part of the copper tape 20, certain specific points are identified for each part of the copper tape 20 to understand the temperature change trend. , T3, and T4, respectively.

The following Tables 1-1 and 1-2 and FIG. 15 show an example in which the effect of reducing the heat generation of the surface heating element through the temperature measurement of the copper tape according to the content of the silver paste is expected, and thereby the occurrence of fire of the surface heating element is reduced . Table 1 below shows the temperature measurements according to the silver paste content, and Table 2 below shows the data analysis.

silver
content Heating element
Temperature Electrode (copper tape)
Temperature change Electrode (copper tape)
Temperature change Electrode (copper tape)
Temperature change Electrode (copper tape)
Temperature change T1 T2 T3 T4 start End change start End change start End change start End change x 100 25.2 45.4 20.2 25.6 51.6 26 24.8 42.7 17.9 25.9 44 18.1 O 25.6 40.4 14.8 24.8 41.8 17 24.2 31.6 7.4 25.2 37 11.8

silver
content Heating element
Temperature End temperature Calculation according to start-end temperature change Average temperature Standard Deviation Temperature change Change car Average temperature Standard Deviation x 100 45.9 3.9 17.9 ~ 26 8.1 20.6 3.8 O 37.7 4.5 7.4-17 9.6 12.8 4.2

With reference to Table 1, Table 2, and FIG. 15, the silver paste has a factor of reducing the contact resistance of the copper tape by reducing the contact resistance between the heat generating paper and the copper tape, and inducing the temperature reduction. Can be found in the amount of silver contained in the silver paste. As a result, the temperature difference between the two models was significantly lower than that of the silver paste (0%) and silver paste (60%). It can be confirmed that it is confirmed.

In addition, the standard deviation between each point, i.e. T1 to T4, should be reduced.

Meanwhile, Tables 3, 4, and 16 show another embodiment of the present invention, in which the temperature of the copper tape is measured in accordance with the presence or absence of punching of the heat generating paper without the silver paste applied to the surface of the heat generating body, This is an example to reduce the incidence of fire. Table 3 is a table showing the temperature measurement according to the presence or absence of puncture, and silver phosphate was not used. Table 4 shows data analysis.

Presence of puncture Heating element
Temperature Electrode (copper tape)
Temperature change Electrode (copper tape)
Temperature change Electrode (copper tape)
Temperature change Electrode (copper tape)
Temperature change T1 T2 T3 T4 start End change start End change start End change start End change X 100 25.2 45.4 20.2 25.6 51.6 26 24.8 42.7 17.9 25.9 44 18.1 O 24.3 38.4 14.1 24.8 48.8 24 24.2 39.7 15.5 24.6 38.1 13.5

Presence of puncture Heating element
Temperature End temperature Calculation according to start-end temperature change Average temperature Standard Deviation Temperature change Change car Average temperature Standard Deviation X 100 45.9 3.9 17.9 ~ 26 8.1 20.6 3.8 O 41.3 5.1 13.5 to 24 10.5 16.8 4.9

With reference to Tables 3, 4, and 16, it is possible to prevent peeling of the copper tape by folding the copper tape to the inner periphery of the perforated portion along with the perforation of the heat generating paper, It is understood that the contact resistance is reduced to induce the temperature decrease of the copper tape. Comparing the model with the perforated model (O) and the model without the perforated model (X), it is found that there is a significant temperature difference between the two models. The application of perforation to the heating paper reduces the temperature of the copper tape I could confirm.

In addition, the standard deviation between each point, i.e. T1 to T4, should be reduced.

Table 5, Table 6, and Table 17 below show another embodiment of the present invention, in which the silver paste is applied and the temperature of the copper tape is measured according to the interval of the apertures, This is an example of the intent to reduce. Table 5 below shows the temperature measurements according to the pore spacing as silver paste, and Table 6 below shows the data analysis.

boring
interval Fever
sieve
Temperature Electrode (copper tape)
Temperature change Electrode (copper tape)
Temperature change Electrode (copper tape)
Temperature change Electrode (copper tape)
Temperature change T1 T2 T3 T4 start End change start End change start End change start End change x

100 25.6 40.4 14.8 24.8 41.8 17 24.2 31.6 7.4 25.2 37 11.8 10mm 24.3 42.9 18.6 24.8 42.2 17.4 24.2 37.9 13.7 24.9 42.9 18 20mm 24.2 39.1 14.9 24.8 37.2 12.4 24.1 43.9 19.8 24.6 41.7 17.1 30mm 25.9 41.5 15.6 28.9 48.4 19.5 24.6 44.6 20 27.5 49.7 22.2

boring
interval Heating element
Temperature End temperature Calculation according to start-end temperature change Average temperature Standard Deviation Temperature change Change car Average temperature Standard Deviation x

100 37.7 4.5 7.4-17 9.6 12.8 4.2 10mm 41.5 2.4 13.7 to 18.6 4.9 16.9 2.2 20mm 40.5 2.9 12.4 to 19.8 7.4 16.1 3.2 30mm 46.1 3.7 15.6 to 22.2 6.6 19.3 2.7

With reference to Table 5, Table 6, and Figure 17, it was confirmed that the temperature and standard deviation of the copper tape decreased with the interval of the perforations, and there was a difference in the average temperature, standard deviation, . The size of the perforations is preferably in the range of 1 to 1.5 mm, which contributes to maintaining the average temperature of the surface heating elements. Particularly, when the interval between the perforations is 10 mm, the average temperature can be maintained relatively secure. The standard deviation between the two groups was the smallest. Moreover, the challenge would be to make the average temperature close to the temperature measurement according to the 60% content of silver paste.

Thus, in the result of various embodiments, in the surface heating element of the present invention, the application of the silver paste and the silver content, the perforation and the interval between the perforations reduce the heat generation of the surface heating element and significantly reduce the fire . Of course, the silver content of the silver paste is preferably 60% by weight, and the interval of the perforations is preferably 10 mm.

Heating paper 10 Copper tape 20
The epoxy 30 (30 '), the PET film 40 (40'),

Claims (14)

A) applying a silver paste by spraying a silver paste using a micro-atomizer on the attachment region of the heat paper and the copper tape to attach the heat paper to the copper tape;
In order to adhere the heating paper evenly coated with the silver paste to the copper tape, a pressing plate placed on the upper and lower sides thereof is used to press the attachment portion of the heating paper and the copper tape in a pressurizing manner, Attaching the heat paper to the copper tape;
Piercing the thermal paper using a perforation needle positioned up and down along the attachment site of the copper tape; c) perforating the attachment site of the heating paper and the copper tape;
The inner peripheral wall of the perforations punctured by the perforation needle is pressed by using a plate-type press plate composed of the expansion pins located in the up and down direction together with the attachment region of the heating paper and the copper tape, and d) A pressing step;
(E) fusing the epoxy by fusing the epoxy using a thermal press plate positioned in the up and down direction to the portion of the copper tape bonded to the upper surface of the heat paper by the punching; And
F) fusing the PET film to the PET film using the thermal press plate located in the up-down direction of the epoxy;
And a heat sink for heating the surface heating element. The method according to claim 1,
Wherein the silver paste in the step of applying a) silver paste is a conductive resin composed of a mixture of silver powder, an acrylic resin and a low boiling point organic solvent. The method according to claim 1,
In the step (c), the perforation needle in the step of perforating the attaching portion of the heat paper and the copper tape is constituted by a pointed portion and a contact plate, or is constituted by a pointed portion, a rounded portion,
The pointed portion is formed by perforating a bonded portion between the copper tape and the heating sheet, the round portion leading to a perforated portion of the copper tape which is punched by the pointed portion, Wherein the sheet member is pressed and bonded to the bottom surface of the heat paper while guiding the perforated portion to be folded in the direction of the bottom surface of the heat paper. The method according to claim 1,
Wherein the inflation fins are inserted into the perforations in the compression step with respect to the attachment region in the vicinity of the perforation, and pneumatic pressure is injected into the inflated resin formed along the periphery of the inflation fins, And the inner peripheral surface of the perforation of the copper tape is pressed toward the peripheral wall of the perforation of the heat generating paper. The method according to claim 1,
E) the epoxy in the step of fusing the epoxy is filled up to the inside of the perforation of the copper tape so that the perforation inner circumferential surface of the copper tape is firmly pressed toward the perimeter inner wall of the heat generating paper by the epoxy Wherein the surface heat generating element has an exothermic reduction. The method of claim 3,
And c) perforations of the copper tape and the heating paper, which are perforated through the perforating step on the attachment region of the heating paper and the copper tape, are perforated at an interval of 10 mm each other. delete delete delete delete delete delete delete delete

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