JPH1041054A - Planar heating body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a planar heating body not liable to cause spontaneous ignition and with a small aging variation of its resistance value by arranging an electrode after mixing and kneading specific quantity of electrically conductive potassium titanate (C) on blended wax with a specific softening point, forming the electrode by holding it between a polyester sheet and nonwoven fabric. SOLUTION: Resins or the like is mixed to wax so as to obtain blended wax prepared for softening point 50 to 100 deg.C (ignition point, about 262 deg.C), 100 part of this prepared wax is heated and melted at a temperature within 80 to 130 deg.C and 70 to 30 part of electrically conductive potassium titanate (C) consisting of K2 O.nTiO2-x /C is mixed and kneaded thereon. As this potassium titanate (C), whisker of about 0.3 to 0.6μm in diameter, 10 to 20μm long is preferable and obtained by applying conductivity realizing process on the surface. Electrode 5, 6 are installed in arrangement on thus obtained mixed and kneaded wax 1 and sandwiched and formed in such a tool to which polyester non-woven cloth 2 is stretched inside surface of the polyester sheet so that a planar heating body 4 which is thin and has widely designed heating temperature may be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar heating element mainly composed of wax and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, a heating element of this type is disclosed in
As in 647696 “thermoelectric resistance composition”, there is a mixture mainly composed of polyalkylene glycols and mixed with carbon powder.

[0003]

In such a conventional heating element, since the main body is a polyalkylene glycol, the heating element is hydrophilic.
There was a problem that the electric resistance changed. In addition, in such a heating element, there is a risk that the carbon powder of the internal conductor may spontaneously ignite or burn due to some stimulus or the like and spread over the entire body, which is dangerous in use. .

[0004] In order to solve the problems of the conventional heating element, the present invention avoids combustion by using a heating element in which conductive potassium titanate is mixed as a conductor. The purpose of the present invention is to provide a heating element characterized in that it is intended to improve safety and that the resistance is not changed by water (humidity) because it is not hydrophilic, and a method of manufacturing the same. It is assumed that. In addition, Japanese Patent Application No. 6-18669 filed by the present applicant for a patent application
No. 2 “Sheet heating element”, but the claims as the sheet heating element of the present application are directed to different ranges, and differ in the category of the invention. is there.

[0005]

The structure of the present invention for achieving the above object will be described with reference to FIGS. 1 to 4 corresponding to the embodiment. Point 5
100 parts of the compounded wax prepared at 0 ° C to 100 ° C (flash point of about 262 ° C) is dissolved at 80 ° C to 130 ° C,
After kneading 7 to 30 parts of conductive potassium titanate (C) of K ₂ O · nTiO _2-x / C, electrodes (5) and (6) are provided, and a polyester sheet (3) A planar heating element (4) formed by sandwiching a polyester non-woven fabric (2) on the inner surface thereof.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Since the heating element of the present invention has such a structure, a resin is blended and the softening point is adjusted to 50 ° C to 100 ° C (flash point about 262 ° C). Since 100 parts of the wax is mainly dissolved at 80 ° C. to 130 ° C., the wax itself is completely liquefied and rich in fluidity, and the conductivity of the component composed of K ₂ O · nTiO _{2 -X} / C added later. Familiar with potassium titanate (C), the wax itself is water-repellent and not hydrophilic, and it is not affected by moisture in the air. , The wax has no risk of spontaneous ignition and, therefore, there is no aging of the resistance.

[0007] The conductive potassium titanate whisker (C) to be mixed has a diameter of 0.3 to 0.6 µm and a diameter of 10 to 20 µm.
It is a very fine whisker with a long length, and the surface is made conductive so that it has chemically and physically stable conductivity.The resistance value can be freely selected and adopted as a conductor or a resistor. Precise circuit design and system design are possible.

[0008] The features that await high strength, high elasticity and high aspect ratio give not only excellent reinforcement performance to the base material, but also enable thin-wall molding and precision molding, as well as high sliding properties and wear resistance. Gender can be given as a base. And, above all, the melting point of whisker is 1,300
Since the temperature is not lower than ℃, it is nonflammable below the combustion temperature, and the conductivity and resistance can be automatically restored to the original state even if the sheet is creased and deformed during use.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 are views showing one embodiment of the present invention, and FIGS. 1 and 2 show the configuration of the present invention.

According to the present invention, a resin is compounded to have a softening point of about 5
0 ° C. to 100 ° C. by melting the blended wax 100 parts of formulated (about 262 ° C. flash point) to 80 ° C. to 130 DEG ° C., it conductive titanate component consisting of _{C 2 O · nTiO 2-X} / C After adding and mixing 7 to 30 parts of potassium (C) and kneading 1, electrodes 5 and 6 are provided, and the polyester sheet 3
Is a planar heating element 4 formed by sandwiching a polyester nonwoven fabric 2 stuck on the inner surface of the sheet heating element 4.

[0011] As described above, the heating element of the present invention contains a resin and has a softening point of 50 ° C to 100 ° C (flash point of about 26 ° C).
2 ° C) and 100 parts of the compounded wax
Since the wax is dissolved at 80 ° C. to 130 ° C., the wax itself is completely liquefied and rich in fluidity, and C ₂ O.nT added later
Well compatible with the conductive potassium titanate (C) composed of iO _2-X / C, the product itself is water-repellent and not hydrophilic, and is not affected by moisture in the air. Since the heat generation temperature of the heating element of the present invention does not rise to 90 ° C. or more, the wax has no risk of spontaneous ignition, and therefore, there is no aging of the resistance value.

The conductive potassium titanate (C) to be mixed is an extremely fine whisker having a diameter of 0.3 to 0.6 μm and a length of 10 to 20 μm. By providing stable electrical conductivity, precise circuit design and system design can be made possible as a conductor and a resistor.

The whisker is characterized by having high strength, high elasticity and high aspect ratio, thereby providing excellent reinforcing performance to the base material, and not only enabling thin-wall molding and precision molding, but also providing high slidability. Mobility and abrasion resistance can be provided. And the melting point is more than 1,300
℃ or more, it is nonflammable below the combustion temperature, and can be restored to its original shape automatically even if it is creased and deformed during use. is there.

Further, due to such characteristics, as described above, the present invention can change the mixing ratio of whiskers to make the thickness as extremely small as about 0.4 mm when used as a heating element. Therefore, in order to adapt to the application, the heat generation temperature, the product use width (20 mm to 500 m
m), a change in the magnitude of the predetermined power supply voltage (6 v to 220
v), total power consumption (100 W / m ^{2 to} 2.5 CW /
It has the advantage that it can be adapted freely, precisely and precisely to changes in m ² ).

FIG. 3 is a characteristic diagram showing an elapsed time from the moment when the switch is turned on and a change in heat generation temperature, and FIG. 4 is a characteristic diagram showing an elapsed time and a change in power consumption from the moment when the switch is turned on. is there. The characteristic shown in FIG. 5 represents a change in the electric resistance value with respect to the indoor atmosphere temperature (horizontal axis). Therefore,
FIGS. 3, 4 and 5 show aspects of self-control of the heating element of the present invention. That is, when the heating element reaches the maximum temperature, the electric resistance value of the heating element itself rises to 10 ³ to 10 ⁵ ohms, and the amount of electricity is supplied by the amount of electricity required for heat radiation (FIG. 3). , FIG. 5). Therefore, the power consumption decreases as the temperature of the heating element rises (FIG. 4).

In the above-described configuration, the present invention is disclosed by way of example. A sheet heating element for a power supply voltage of 100 V used as a heat source for a house or floor heating is used. Parts and 20 parts of potassium titanate (C), the total inrush power consumption is about 2.5
CW. Also, 100v of heating element for indoor floor heating etc.
As for the voltage, the component incorporation ratio is 100 parts by weight of wax and 12 parts of potassium titanate (C).
0W.

The above mixing ratio is not fixed,
Depending on the magnitude of the initially set predetermined power supply voltage, power consumption, calorific value, etc., it is appropriately increased or decreased according to each application, and is appropriately changed and used so as to be able to adapt to the required fine conditions. Thus, the unique effects of the present invention can be obtained.

Therefore, since the sheet heating element of the present invention exhibits the originally set specific heating temperature, there is no need for a conventional temperature adjusting device for turning on and off the power switch using a temperature sensor or the like. That is, in use, it is sufficient to replenish only the amount of heat lost from the surface of the heat radiating surface, so that the current consumption is extremely small.

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of the embodiments, and has the above-mentioned constitutional requirements according to the present invention, and The present invention achieves the object of the present invention and can be appropriately modified and implemented within the range having the following effects.

[0020]

As is clear from the above description, the present invention is based on a wax, and since the wax itself is water-repellent and not hydrophilic, it has no effect on moisture in the air. No spontaneous ignition occurs since the heating element of the present invention cannot be heated to 90 ° C. or more.

The conductive potassium titanate whiskers to be mixed are extremely fine whiskers and have conductivity, so that an electric heating circuit can be easily designed as a conductor and a resistor, and thin-wall molding or precision molding can be performed. It can provide excellent reinforcement performance to the base material, and can provide high slidability and wear resistance.

The conductive potassium titanate whisker (C) has a melting point of 1,300 ° C. or more, so that it is nonflammable until it reaches the combustion temperature, and it is foldable during use. Is also suitable as a heating element because it can be naturally restored.

Further, due to such characteristics, as described above, according to the present invention, the heating element of the present invention is not affected by the moisture in the air by appropriately changing the mixing ratio of the constituent components thereof. Since the exothermic temperature does not rise above 90 ° C., the wax has no risk of spontaneous ignition. In addition, by changing the composition ratio of the components, the heat generation temperature and heat generation amount can be changed, and the electric resistance value can be freely, accurately and precisely adapted to the change in the applied rated power supply voltage and the change in the total power consumption. Can be set in various ways, and the thickness of the heating element can be extremely small, about 0.4 mm.
There is thus the advantage that it can be adapted to various applications.

[Brief description of the drawings]

FIG. 1 is an external view showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a characteristic diagram showing changes in elapsed time and heat generation temperature.

FIG. 4 is a characteristic diagram showing changes in elapsed time and power consumption.

FIG. 5 is a characteristic diagram showing a change in an electric resistance value depending on an ambient temperature.

[Explanation of symbols]

1 Dissolve the blended wax blended with resins, and add C ₂ O.
A mixture of conductive potassium titanate whiskers (C) composed of nTiO _2-x / C ₂ Non _- woven fabric of polyester 3 Polyester sheet 4 Planar heating element 5, 6 Electrode

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 27, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Planar heating element

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar heating element mainly composed of wax.

[0002]

2. Description of the Related Art Conventionally, a heating element of this type is disclosed in
As in 647696 “thermoelectric resistance composition”, there is a mixture mainly composed of polyalkylene glycols and mixed with carbon powder.

[0003]

In such a conventional heating element, since the main body is a polyalkylene glycol, the heating element is hydrophilic.
There was a problem that the electric resistance changed. Further, in such a heating element, there is a risk that the carbon powder of the internal conductor may spontaneously ignite or burn due to some stimulation or the like and spread over the entire body, which is dangerous in use. .

In order to solve the problems of the conventional heating element, the present invention avoids combustion by using a heating element in which conductive potassium titanate is mixed as a conductor. The purpose is to improve safety, and because it is not hydrophilic, water (humidity)
An image characterized in that the resistance value can be prevented from changing.
It is intended to provide a Jo heating element. In addition, there is Japanese Patent Application No. Hei 6-186692 filed by the applicant of the present invention, "Sheet heating element", which is directed to a different range from the claims as the sheet heating element of the present application. And
Further, the categories of the invention are different.

[0005]

The structure of the present invention for achieving the above object will be described with reference to FIGS. 1 to 5 corresponding to the embodiment. Point 5
100 parts of the compounded wax prepared at 0 ° C to 100 ° C (flash point of about 262 ° C) is dissolved at 80 ° C to 130 ° C,
Then, after kneading 7 to 30 parts of conductive potassium titanate (C) as a component composed of K ₂ O · nTiO _2-x / C, electrodes (5) and (6) are provided, and a polyester sheet is provided. (3) A sheet heating element (4) having a configuration formed by being sandwiched between a polyester nonwoven fabric (2) adhered to the inner surface thereof.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Since the heating element of the present invention has such a constitution, a resin is blended and the softening point is adjusted to 50 to 100.degree. C. (flash point of about 262.degree. C.). Since 100 parts of the wax is mainly dissolved at 80 ° C. to 130 ° C., the wax itself is completely liquefied and rich in fluidity, and the conductivity of the component composed of K ₂ O · nTiO _2-x / C added later Familiar with potassium titanate (C),
The wax itself is water-repellent and not hydrophilic, and is not affected by moisture in the air.The heating element of the present invention does not have a heating temperature of 90 ° C. or higher. There is no danger of spontaneous ignition and, therefore, there is little aging of the resistance.

The mixed conductive potassium titanate whisker (C) has a diameter of 0.3 to 0.6 μm and a diameter of 10 to 20 μm.
It is an extremely fine whisker with a length of m and has a chemically and physically stable conductivity by treating the surface conductive, so that the resistance value can be freely selected and adopted as a conductor or a resistor. , Precise circuit design and system design are possible.

[0008] The features that wait for high strength, high elasticity, and high aspect ratio provide excellent reinforcement performance to the base material, enabling not only thin-wall molding and precision molding, but also high sliding properties and wear resistance. Gender can be given as a base. And, above all, the melting point of whisker is 1,300
Since the temperature is not less than ° C., it is nonflammable below the combustion temperature, and the conductivity and the resistance value can be automatically restored to the original state even if the sheet is creased and deformed during use.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 5 show an embodiment of the present invention, and FIGS. 1 and 2 show the configuration of the present invention.

According to the present invention, a resin is compounded to have a softening point of about 5
100 parts of the blended wax prepared at 0 ° C. to 100 ° C. (flash point of about 262 ° C.) is melted at 80 ° C. to 130 ° C., and a conductive titanic acid component of K ₂ O · nTiO _2-x / C is added thereto. After mixing and kneading 7 to 30 parts of potassium (C), the electrodes 5 and 6 are arranged, and the polyester sheet 3 is formed by sandwiching a polyester nonwoven fabric 2 attached to the inner surface thereof. It is a planar heating element 4.

[0011] As described above, the heating element of the present invention contains a resin and has a softening point of 50 ° C to 100 ° C (flash point of about 26 ° C).
2 ° C) and 100 parts of the compounded wax
Since the wax itself is dissolved at 80 to 130 ° C., the wax itself is completely liquefied and rich in fluidity, and C ₂ O.nT added later
The product is well compatible with the conductive potassium titanate (C) composed of iO2 _-x / C, and the product itself is water-repellent and not hydrophilic, and is not affected by moisture in the air. Since the heating element of the present invention does not have a heating temperature higher than 90 ° C., there is no risk of spontaneous ignition of the wax, and therefore, the resistance value changes little over time .

The conductive potassium titanate (C) to be mixed is an extremely fine whisker having a diameter of 0.3 to 0.6 μm and a length of 10 to 20 μm. By providing stable electrical conductivity, precise circuit design and system design can be made possible as a conductor and a resistor.

The whisker is characterized by having high strength, high elasticity and high aspect ratio, thereby providing excellent reinforcing performance to the base material, and not only enabling thin-wall molding and precision molding, but also providing high slidability. Mobility and abrasion resistance can be provided. And the melting point is more than 1,300
℃ or more, it is nonflammable below the combustion temperature, and can be restored to its original shape automatically even if it is creased and deformed during use. is there.

Further, due to such characteristics, as described above, the present invention can change the mixing ratio of whiskers to make the thickness as extremely small as about 0.4 mm when used as a heating element. Therefore, in order to adapt to the application, the heat generation temperature, the product use width (20 mm to 500 m
m), a change in the magnitude of the predetermined power supply voltage (6 v to 220
v), total power consumption (100 W / m ^{2 to} 2.5 KW / m)
² ) There is an advantage that the change can be freely, accurately, and precisely adapted to the change.

FIG. 3 is a characteristic diagram showing an elapsed time from the moment when the switch is turned on and a change in heat generation temperature, and FIG. 4 is a characteristic diagram showing an elapsed time and a change in power consumption from the moment when the switch is turned on. is there. The characteristic shown in FIG. 5 represents a change in the electric resistance value with respect to the indoor atmosphere temperature (horizontal axis). Therefore,
FIGS. 3, 4 and 5 show aspects of self-control of the heating element of the present invention. That is, when the heating element reaches the maximum temperature, the electric resistance value of the heating element itself rises to 10 ³ to 10 ⁵ ohms, and the amount of electricity is supplied by the amount of electricity required for heat radiation (FIG. 3). , FIG. 5). Therefore, the power consumption decreases as the temperature of the heating element rises (FIG. 4).

In the above-described configuration, the present invention is disclosed by way of example. A sheet heating element for a power supply voltage of 100 V used as a heat source for a house or floor heating is used. Parts, about 18 parts of potassium titanate (C), the total inrush power consumption is about 2.
5 KW. Further, 100 of heating elements for indoor floor heating and the like are used.
For the v voltage, the rush power consumption is about 500 W when the composition ratio of the wax is 100 parts and the potassium titanate (C) is about 10 parts .

The above mixing ratio is not fixed,
Depending on the magnitude of the initially set predetermined power supply voltage, power consumption, calorific value, etc., it is appropriately increased or decreased according to each application, and is appropriately changed and used so as to be able to adapt to the required fine conditions. Thus, the unique effects of the present invention can be obtained.

Therefore, since the sheet heating element of the present invention exhibits the originally set specific heating temperature, there is no need for a conventional temperature adjusting device for turning on and off the power switch using a temperature sensor or the like. That is, in use, it is sufficient to replenish only the amount of heat lost from the surface of the heat radiating surface, so that the current consumption is extremely small.

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of the embodiments, and has the above-mentioned constitutional requirements according to the present invention, and The present invention achieves the object of the present invention and can be appropriately modified and implemented within the range having the following effects.

[0020]

As is clear from the above description, the present invention is based on a wax, and since the wax itself is water-repellent and not hydrophilic, it has no effect on moisture in the air. No spontaneous ignition occurs since the heating element of the present invention cannot be heated to 90 ° C. or more.

The conductive potassium titanate whiskers to be mixed are extremely fine whiskers and have conductivity, so that an electric heating circuit can be easily designed as a conductor and a resistor, and thin-wall molding or precision molding can be performed. It can provide excellent reinforcement performance to the base material, and can provide high slidability and wear resistance.

Since the conductive potassium titanate whisker (C) has a melting point of 1,300 ° C. or more, it is nonflammable until it reaches the combustion temperature, and even if it is creased during use, it is naturally free from cracks. Therefore, it is suitable as a heating element.

Further, due to such characteristics, as described above, according to the present invention, the heating element of the present invention is not affected by the moisture in the air by appropriately changing the mixing ratio of the constituent components thereof. Since the exothermic temperature does not rise above 90 ° C., the wax has no risk of spontaneous ignition. In addition, by changing the composition ratio of the components, the heat generation temperature and heat generation amount can be changed, and the electric resistance value can be freely, accurately and precisely adapted to the change in the applied rated power supply voltage and the change in the total power consumption. Can be set in various ways, and the thickness of the heating element can be extremely small, about 0.4 mm.
There is thus the advantage that it can be adapted to various applications.

[Brief description of the drawings]

FIG. 1 is an external view showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a characteristic diagram showing changes in elapsed time and heat generation temperature.

FIG. 4 is a characteristic diagram showing changes in elapsed time and power consumption.

FIG. 5 is a characteristic diagram showing a change in an electric resistance value depending on an ambient temperature.

[EXPLANATION OF SYMBOLS] was dissolved compounded wax blended with 1 resins, K ₂ O ·
What kneaded the conductive potassium titanate whisker (C) of the component consisting of nTiO2 _-x / C ₂ Non _- woven fabric of polyester 3 Polyester sheet 4 Planar heating element 5, 6 Electrode

Claims (1)

[Claims] 1. A resin having a softening point of 50 ° C. to 10 ° C.
Formulated wax 10 formulated at 0 ° C (flash point approx. 262 ° C)
0 parts are dissolved at 80 ° C. to 130 ° C.
After kneading the ₂ O · nTiO _2-X / conductive potassium titanate C consisting Component (C) 7 parts to 30 parts, the electrode (5),
A sheet heating element (4) having a structure in which (6) is provided, and the sheet is sandwiched between a polyester sheet (3) and an inner surface of a polyester nonwoven fabric (2).