KR102073683B1 - Steering handle containing composite material having piezo-electric and heating function, and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a three-dimensional composite having a piezoelectric and / or heat generating function and a method for manufacturing the same, and more specifically, a piezoelectric sensor and a heat generating function is generated by mixing a rubber and carbon material at the same time, car, motorcycle, bicycle, airplane, ship It is a complex that can be used safely and minimize the cost and current consumption by using the steering device.

Description

Steering handle including a three-dimensional composite with piezoelectric and heat-generating function and a method for manufacturing the same {STEERING HANDLE CONTAINING COMPOSITE MATERIAL HAVING PIEZO-ELECTRIC AND HEATING FUNCTION, AND MANUFACTURING METHOD THEREOF}

The present invention relates to a three-dimensional composite including a piezo-electric and / or a heat generating function and a method for manufacturing the same, and more particularly, to a piezo-electric sensor by manufacturing a composite of a rubber and carbon material in a three-dimensional form And it relates to a method for the heating function is achieved at the same time.

In the past, the automobile mainly used as a simple function of movement, it has recently been changed to a means of transportation having various functions satisfying safety, convenience, comfort, and comfort, according to the needs of the user.

Among them, a steering wheel is a device for moving a wheel of a vehicle to change the direction of travel, and is generally referred to as a steering wheel or a steering wheel, and is also called a steering handle or a driving wheel.

Recently, a technology for detecting a driving state or a situation of a user by using a piezoelectric sensor in a steering device (handle, etc.) has been developed.

In particular, the steering device using a piezoelectric sensor detects an abnormal state of the user's steering device and quickly detects an abnormality by ringing a horn, tightening a seat belt, giving a vibration to an accelerator pedal, or notifying the user of a warning message. Various techniques have been developed, such as preventing and alerting.

However, these features are limited to luxury cars due to cost problems.

The steering unit's core is made of metal, such as aluminum, and is wrapped in leather, plastic or foam over the core for aesthetics and comfort.

However, since the surface is exposed to the outside space, when the driver falls to a very low temperature in the winter and the driver catches the steering device, the cold air is transmitted as it is, causing discomfort, which causes difficulty in operating the device.

 Efforts have been made to solve the above-mentioned safety problem of the driver's operation of the device and the problem of low temperature discomfort.

As the prior art that is the background of the present invention, Korean Patent Publication No. 10-2002-0096286 (hereinafter, 'prior document 1'), Republic of Korea Patent Publication No. 10-1116472 (hereinafter, 'prior document 2') , Korean Patent Publication No. 10-1273061 (hereinafter referred to as "prior document 3") and Japanese Patent Application Laid-open No. 2005-537992 (hereinafter referred to as "prior document 4").

Prior art 1 relates to a steering device that converts vibration generated in the steering device after the engine is started into a current by using a piezoelectric sensor as a steering device preheating device of a vehicle, and the current is supplied to the resistance coil to generate heat.

In the steering apparatus of the prior document 1, the current converted through the piezoelectric sensor is supplied to the resistance coil to generate heat, but since it consumes a lot of power as a general heater, it is difficult to generate heat to the steering apparatus using only the switched current.

Prior art document 2 is a carbon nanotube-metal particle composite composition and a heat steering device using the same, which sprays carbon nanotube-silver (Ag) dispersion on the outer layer of a synthetic resin to form a carbon nanotube heating coating layer so that the resistance value does not change. It relates to a composition.

The invention of Prior Art 2 may cause quality problems such that the heat generating coating layer formed on the outer circumferential surface of the synthetic resin part is unevenly sprayed, or the adhesive force is reduced due to abrasion, so that the heat is not evenly generated.

Prior art 3 relates to a heat generating device having a uniform heat generation, and a heat generating device having a uniform temperature distribution on the entire surface of the rim by varying the thickness of the heat generating layer formed on the rim.

Invention 3 of the prior art uses the exothermic paint and the spray gun to form a exothermic layer on the outside of the rim, but the portion where the exothermic paint is thickly applied is difficult to manufacture to a desired thickness.

Prior art document 4 relates to a steering apparatus which generates heat by heating a heating film by detecting a physical quantity of a steering apparatus with a vehicle apparatus for detecting a contact, measuring the surface temperature of the apparatus.

Invention 4 of the prior art detects a physical quantity applied to the steering apparatus and reflects light to the user's hand through the reflective photoelectric switch if the user does not support the steering apparatus, which is difficult for the user to recognize immediately.

<Preceding technical literature>

Republic of Korea Patent Publication No. 10-2002-0096286

Republic of Korea Patent Publication No. 10-1116472

Republic of Korea Patent Publication No. 10-1273061

Japanese Laid-Open Patent Publication No. 2005-537992

The present invention is to solve the problems of the prior art, to solve the problem of deterioration of quality due to the non-uniformity, wear, etc. of the exothermic coating layer to the outer peripheral surface of the synthetic resin layer of the steering device is reduced adhesion. do.

In addition, the present invention uses a resistance coil in the case of a structure wrapped with a synthetic resin portion and a heating pad formed on the outer side of the steering wheel, it consumes a lot of power as in the case of a general heater, the power of the battery that is limited to defects such as short circuit To solve the problem of high consumption.

In addition, the present invention has a high cost by using a separate material for the piezoelectric sensor and the heat generating function, respectively, so that in the current situation that can only be used only for high-end vehicles, the piezoelectric and heat-generating complex by developing a composite This can be applied to more vehicles.

In order to achieve the above object, the present invention includes 85 to 99% by weight of rubber and 1 to 15% by weight of carbon material, and piezoelectric and / or exothermic, characterized in that it is made of a device having a piezoelectric and / or heat generating function. It is a three-dimensional complex with functions.

The rubber of the present invention is isoprene rubber, chloroprene rubber, ethylene propylene rubber, acrylonitrile butadiene rubber, polybutadiene rubber, styrenebutadiene rubber (styrene butadiene rubber), butyl rubber, neodymium butadiene rubber, solution styrene butadiene rubber, acrylic rubber, urethane rubber or silicone resin It characterized in that any one or more of (silicone) is included.

Carbon material of the present invention is characterized in that any one or more of fullerene (grapher), graphene (graphene), carbon micro coil (carbon micro coil) or carbon nanotube (carbon nanotube) is included.

The three-dimensional composite of the present invention is characterized in that the product is used as a function of any one or more of the piezoelectric sensor and / or the heating element.

Three-dimensional composite manufacturing method of the present invention comprises the steps of dispersing the carbon material (S100); Mixing 85 to 99% by weight of rubber and 1 to 15% by weight of carbon material (S200); Rolling the mixed composition (S300); And sizing the rolled composition and impregnating the wires to cure (S400).

In the step of dispersing the carbon material of the present invention (S100), the carbon material is characterized in that any one or more of fullerene, graphene, carbon micro coils or carbon nanotubes is included.

In the step of mixing the rubber and carbon material of the present invention (S200), the carbon material includes 1 to 15% by weight, and the rubber material isoprene rubber, chloroprene rubber, ethylene propylene rubber, acrylonitrile butadiene rubber, polybutadiene rubber, At least one of styrene butadiene rubber, butyl rubber, neodymium butadiene rubber, solution styrene butadiene rubber, acrylic rubber, urethane rubber or silicone resin is characterized in that 85 to 99% by weight.

Sizing the rolled composition of the present invention and the step of impregnating the electric wire by inserting the electric wire in the step (S400) is characterized in that the curing by pressing at a temperature of 100 ~ 250 ℃.

The three-dimensional composite produced by the manufacturing method of the present invention is characterized in that it is used as any one or more of the piezoelectric sensor and / or the heating element, the product containing any one or more of the function of piezoelectric or heating.

The present invention is not a method of coating the heating material on the outer peripheral surface of the synthetic resin layer of the steering apparatus, but by using a three-dimensional heating element, the adhesive force and the coating layer is lowered, the heat generation without problems of quality deterioration due to unevenness of the heating coating layer, wear, etc. Constantly occurring complexes can be provided.

In addition, the present invention is to provide a composite that minimizes the safety problems and power consumption of the vehicle by having a conductive power to all parts of the three-dimensional heating element without the use of a resistance coil in the steering apparatus, minimizing the safety problems and power consumption of the vehicle. Can be.

Furthermore, since the present invention uses the heating function and the piezoelectric sensor function, respectively, the heating range and the piezoelectric sensor function can be simultaneously implemented with the present invention, compared to the limited vehicle added to the luxury car or the option due to the high cost. You can zoom in.

Furthermore, it can be applied to driving devices such as bicycles, motorcycles, airplanes and ships, and can be utilized in various transportation machines to minimize cost, safety and current consumption.

1 is a flow chart of a method of manufacturing a three-dimensional composite functioning as a piezoelectric sensor and a heating element of the present invention.
Figure 2 shows the carbon nanotubes dispersed.
3 is a mixer for mixing rubber and carbon materials.
4 is a rolling device for producing a composite in three-dimensional form.
5 is a press device for curing and sizing the composite by thermocompression bonding.
6 is a three-dimensional piezoelectric sensor combined heating element of various sizes produced by the manufacturing method of the present invention.
7 is an image of a steering apparatus to which a composite manufactured by the manufacturing method of the present invention is applied.
8 compares the conductivity before and after dispersion of carbon nanotubes.
9 compares the resistance according to the pressure using the three-dimensional composite of the present invention.
Figure 10 compares the temperature according to the resistance of the three-dimensional composite produced by the present invention.
Figure 11 compares the exothermic state before and after the three-dimensional composite of the present invention.
<Code description>
S100: dispersing the carbon material;
S200: mixing 85 to 99% by weight of rubber and 1 to 15% by weight of carbon material;
S300: rolling the mixed composition;
S400: sizing the rolled composition and impregnating the wire to cure;

Hereinafter, the present invention will be described in detail through examples.

The objects, features and advantages of the present invention will be readily understood through the following examples.

The invention is not limited to the embodiments disclosed herein, but may be embodied in other forms. The embodiments disclosed herein are provided to sufficiently convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention pertains, and all the transformations included in the technical spirit and technical scope of the present invention. It should be understood to include equivalents, substitutes, or substitutes.

Therefore, the present invention should not be limited by the following embodiments, and it should be understood that all transformations included in the technical spirit and technical scope of the present invention are included. That is, a person having ordinary knowledge in the technical field to which the present invention belongs may variously modify or modify the present invention by adding, changing, deleting or adding components within the scope not departing from the spirit of the present invention described in the claims. It will be possible to change, which will also be within the scope of the invention.

As the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail. In the drawings, the size of elements or the relative sizes between elements may be somewhat exaggerated for clarity of understanding of the present invention. In addition, the shape of the elements shown in the drawings may be somewhat changed due to variations in the manufacturing process.

Therefore, the embodiments disclosed herein are not to be limited to the shapes shown in the drawings unless otherwise stated, it is to be understood to include some variation.

On the other hand, various embodiments of the present invention can be combined with any other embodiment unless clearly indicated to the contrary. Any feature indicated as particularly preferred or advantageous may be combined with any other feature and features indicated as preferred or advantageous. That is, various aspects, features, embodiments or implementations of the invention may be used alone or in various combinations.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limited by the claims. All technical and scientific terms used herein are commonly described unless otherwise indicated. It has the same meaning as is generally understood for a person with Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

<Example 1. Composite Preparation>

1 is a flow chart of a method of manufacturing a three-dimensional composite having a piezoelectric sensor and a heating element function of the present invention.

1) dispersing the carbon material (S100)

The carbon material is prepared to prepare the composite.

The carbon material may use any one or more of fullerene, graphene, carbon micro coil or carbon nanotube, and preferably carbon nanotube. However, the present invention is not limited thereto.

The dispersion method of the carbon material is variously selected, such as dry dispersion, wet dispersion, high speed stirring dispersion, ultrasonic dispersion, dispersion using a solvent or a dispersant, preferably dry dispersion, but is not limited thereto.

The dispersion process of carbon nanotubes carried out in the present invention is performed by dry dispersion in order to minimize the resistance and at the same time minimize the requirements of carbon nanotubes, and the conductivity of the composite appears three-dimensionally evenly.

The dry dispersion is performed by dispersing in a dispersing apparatus in a state where only powder is alone, and by dispersing the powder by applying pressure, vibration, or electric shock to the powder in a manner of coating the dispersion, and then drying again. The opposite is true.

If carbon nanotubes are not dispersed in the carbon material, the carbon nanotubes may exhibit a cohesive or nonuniform electrical property and may include a dispersion process to improve electrical resistance to the same content.

Carbon nanotubes used in the dispersion treatment may be any one or more of single-walled carbon nanotubes (SWCNT) or multi-walled carbon nanotubes (MWCNT), preferably may be used multi-walled carbon nanotubes, but is not limited thereto. It doesn't work.

The multi-walled carbon nanotubes may have a diameter of 30 nm or less, and preferably 10 to 30 nm in size, but are not limited thereto.

FIG. 2 is a diagram illustrating dispersion-treated carbon nanotubes, and FIG. 8 is a comparison of conductivity before and after dispersion of carbon nanotubes. As shown in FIG. 8, surface resistivities of carbon nanotubes before dispersion are 1.0E +, respectively. 06Ω / □, 1.0E + 07Ω / □ and 1.0E + 04Ω / □ are shown.

The surface resistivity of the carbon nanotubes after dispersion is 1.0E + 02Ω / □, 1.0E + 03Ω / □ and 1.0E + 00Ω / □, respectively.

Through this, it can be seen that the surface resistivity of the carbon nanotubes is lower after dispersion than before dispersion.

In addition, when the carbon nanotubes are dispersed, it is inferred that the surface resistivity is lowered, thereby increasing the electrical conductivity. When the carbon nanotubes are dispersed, the electrical conductivity is 100 to 10,000 times higher with the same content.

Furthermore, the dispersed carbon nanotubes can be implemented using a small amount in accordance with the conductivity required at a specific value, thereby lowering the unit cost.

Furthermore, the dispersed carbon nanotubes can guarantee a uniform quality even when using a very small amount compared to the conventional carbon black, graphite, and the like.

2) mixing 85 to 99% by weight of rubber and 1 to 15% by weight of carbon material (S200)

In the present invention, the rubber is isoprene rubber, chloroprene rubber, ethylene propylene rubber, acrylonitrile butadiene rubber, polybutadiene rubber, styrene butadiene rubber, butyl rubber, neodymium butadiene rubber, solution styrene butadiene rubber, acrylic rubber, urethane rubber or silicone resin Any one or more of the above is not limited thereto.

When the composite of the present invention is in direct contact with the user's body or a lot of contact, it is best to use a silicone resin in consideration of the safety of the user.

Silicone resin is a thermoplastic synthetic resin made by polymerizing organic derivatives of silicone. It is water-resistant, heat-resistant, chemical-resistant, has good heat resistance and lubricity, and is non-toxic and has low levels of volatile organic compounds. It is possible.

The silicone resin may be a liquid or solid phase.

The carbon material may be used to give conductivity to the rubber, and may be one prepared in the step of dispersing the carbon material (S100).

However, since the composite is manufactured in three-dimensional form, it is best to use dispersed carbon nanotubes in order to have even conductivity.

85 to 99% by weight of rubber and 1 to 15% by weight of carbon material may be mixed in a mixer, preferably 87 to 98% by weight of rubber and 2 to 13% by weight of carbon material, more preferably 90 to 97% by weight of rubber And 3 to 10% by weight of the carbon material may be mixed, but is not limited thereto.

When the carbon material is mixed at less than 1% by weight, piezoelectric sensors or heat generating functions are less likely to appear, and when mixed at more than 15% by weight, dispersibility and electrical resistance may be reduced.

The mixer may be used by selecting any one of a kneader, a roll mill, a screw press, and the like, but is not limited thereto.

The kneader is stable in productivity, has good low viscosity blending dispersibility, and can be observed.

3 is a mixer for mixing rubber and carbon materials.

In addition, the mixer may be a rubber and carbon material is mixed at 10 ~ 100rpm, 15 ~ 60 ℃, 5 ~ 20 minutes, preferably 30 ~ 40rpm, 30 ~ 40 ℃, may be mixed at 10 ~ 15 minutes, It is not limited to this.

In addition, the rotation speed, temperature, and time of the mixer may be changed according to the type and content of the rubber or carbon material.

If the mixing speed is less than 10rpm it is difficult to mix the rubber and carbon material constantly, and if the mixing is more than 100rpm physical properties may fall.

If the mixing temperature and time is exceeded, it is difficult for the rubber and carbon materials to be constantly mixed, and the physical properties may be degraded.

3) rolling the mixed composition (S300)

The composition mixed with rubber and carbon material may be manufactured as a three-dimensional composite through a rolling device in consideration of the size, shape, and thickness of the steering device of the vehicle used by the user, and thus the size, shape, and thickness thereof are not particularly limited. Do not.

4 is a rolling device for producing a three-dimensional composite.

Alternatively, the mold may be manufactured to produce a three-dimensional composite.

Furthermore, the three-dimensional composite is flexible, so that not only the steering device (handle) of the car but also steering device, steering device cover, case or other object that requires the function of heating and piezoelectric sensor to control the driving direction of bicycle, motorcycle, airplane, ship, etc. Applicable to

4) sizing the rolled composition and impregnating the wire to cure (S400)

The three-dimensionally rolled composite further includes a process in which wires are impregnated into the composite for exothermic or piezoelectric functions.

Impregnating the wires into the composite can prevent short circuits or electric shock.

The wire used a known technique having flexibility and corrosion resistance because the composite is produced in three-dimensional form.

Both sides where wires are inserted can be hardened by thermocompression bonding.

5 is a press device for curing and sizing the composite by thermocompression bonding.

In the present invention, the thermal compression may be performed for 10 to 30 minutes at 100 to 250 ° C., preferably for 10 to 20 minutes at 150 to 200 ° C., depending on the type and content of rubber or carbon material, but is not limited thereto. Do not.

If it is carried out at 100 ℃ or less than 10 minutes during thermocompression, it may not be suitable for frequent use because both sides are not sufficiently fixed, and if it is performed at 250 ℃ or more than 30 minutes at thermocompression, Therefore, physical properties may be reduced.

As the wire, a metal wire made of a single metal or an alloy selected from one strand or several tens of iron, copper, nickel, aluminum, silver, gold, platinum, and the like may be used. It is good.

More preferably impregnated with wires of 10 or more strands.

The reason is that the more strands, the better the adhesion between the rubber and the wire.

In particular, in the case of the three-dimensional heating element like the present invention, since it is not necessary to worry about line short circuits, perforations, etc., it is more preferable to focus on the adhesiveness between the electric wire and the rubber.

The composite produced by thermocompression is eco-friendly and permanently available because no adhesive is used.

Figure 6 is a three-dimensional complex prepared by the production method of the present invention.

The conventional steering device generates heat by using a resistance coil, or uses a piezoelectric sensor to hold the steering device of the user through pressure applied to the steering device (for example, a hand holding the device). There is a function that tells whether or not by sound.

FIG. 7 is an image of a steering apparatus to which a composite manufactured by the manufacturing method of the present invention is applied, as shown in FIG. 7, and may be applied to a steering apparatus using a three-dimensional composite.

On the other hand, when the three-dimensional composite with the wire is used in the steering apparatus as in the present invention, the current consumption is minimized to reduce the burden on the battery having a limited capacity, and can simultaneously play the role of a piezoelectric sensor with a heat generation function.

If the sound of klaxon connected by the piezoelectric sensor is generated, the driver will be informed of a dangerous situation when the device is placed, thereby preventing an accident.

Furthermore, it can alert drivers by generating device vibration, seat belt tightening, accelerator vibration, etc., as well as sound, and can notify other drivers of dangerous situations by lighting and flashing lights.

In addition, the danger warning display by the piezoelectric sensor may be generated at the moment when the device recognizes, or may be adjusted to occur after a predetermined time (for example, 0.5 to 5 seconds).

Steering device to which the three-dimensional composite with the electric wire of the present invention is applied is automatically supplied with power when heated by a certain pressure, the user can maintain a predetermined temperature (for example, 15 ~ 25 ℃).

<Example 2>

The power button unit and the temperature control unit may be further included in the steering apparatus using the three-dimensional composite manufactured by the manufacturing method of Example 1.

The power button unit may be formed on an outer circumferential surface of the steering apparatus using a three-dimensional composite to control the supply of current.

The temperature controller may be installed on an outer circumferential surface of the steering apparatus to control the steering apparatus at a temperature set by a user, and may sense and control the temperature of the steering apparatus.

In addition, the temperature controller may further include a temperature sensor for sensing the temperature.

The temperature sensor may control the temperature by controlling the current flow by measuring the current sensed in the complex based on the temperature sensed by the steering device and transmitting the current to the temperature controller.

Experimental Example 1. Comparison of Resistance According to Pressure of Composites

The resistance according to the pressure was compared using the composite of the example.

In the experimental group, a composite of silicon resin and dispersed carbon nanotubes was used, and resistances were compared by applying pressures of 0, 0.5, 1, 1.5, 2, 2.5 and 3 kgf / cm ² .

9 is a comparison of the resistance according to the pressure using the composite of the present invention as shown in Figure 9, the resistance is 10 ^6.6 Ω · cm at a pressure of 0kgf / cm ² , pressure of 0.5 ~ 3kgf / cm ² It can be seen that the resistance is 10 ^4.4 ~ 10 ⁵ Ω · cm.

The composite of the present invention can be confirmed that the electrical resistance is increased by increasing the resistance as the pressure increases, it can be inferred that it can be used as a piezoelectric sensor using this.

<Experimental Example 2 Temperature Comparison According to Resistance of Composite>

The temperature according to the resistance was compared using the composite of the example.

As the experimental group, a composite of silicon resin and carbon nanotubes dispersed in a dispersion was used, and resistances of 2.2, 3, 3.5, 4, and 4.5 Ω were compared to compare the temperatures.

10 is a comparison of the temperature according to the resistance using the composite of the present invention. Looking at FIG. 10, it can be seen that the temperature is 54.8 to 76.6 ° C. at a resistance of 2.2 to 4.5 kV. It can be confirmed that it occurred.

It was confirmed that the temperature of the composite of the present invention decreases with increasing resistance, and it can be inferred that the composite can be used as a heating material.

In addition, the electric power used at the temperature of 54.8-76.6 degreeC is 5.8-13.5W, and it turns out that it consumes 14W or less of power normally.

This can be inferred by consuming less than 6W when maintaining the temperature below 50 ° C.

Therefore, it is possible to minimize the power consumption of the battery of the vehicle than the steering device in which the heat generating function using a conventional resistance coil.

Looking at the above experimental results, it can be seen that the composite of the present invention can be made at the same time the piezoelectric sensor function and the heating function.

<Experimental Example 3 Resistance and Temperature Test of Carbon Nanotube Content of Three-dimensional Composite>

Using the composite of the Example was compared the temperature and resistance of carbon nanotube content.

As a test group, a composite of silicon resin and carbon nanotubes was used, and resistance was measured by mixing 90 to 99% by weight of silicon resin and 1 to 10% by weight of carbon nanotube.

The carbon nanotubes were dispersed.

Table 1 is a result of comparing the resistance and temperature according to the silicone resin and the dispersion-treated carbon nanotube content.

Looking at <Table 1>, it can be seen that the silicon resin content decreases, and the resistance decreases as the carbon nanotube content increases.

More specifically, it can be seen that as the content of carbon nanotubes decreases, the resistance is less than 12 kW to 1.4-11.4 kW.

In particular, the resistance of the composite containing 90% by weight of silicone resin and 10% by weight of carbon nanotubes is 1.4 kPa.

Through this, it can be inferred that as the content of carbon nanobute increases, the resistance decreases, thereby increasing the electrical conductivity.

When the temperature reaches 40 ℃, it can be seen that it takes 78 seconds at 5% by weight of carbon nanotubes, and 20 seconds at 10% by weight of carbon nanotubes.

It can be seen that the lower the resistance, the shorter the time to reach the temperature, and to increase the content of carbon nanotubes in order to lower the resistance.

In addition, since the power consumption consumed for the temperature of 40 ℃ is consumed 3.3 ~ 4.2Wh, it can be inferred that less than 3Wh is consumed if the temperature is lower than this.

Looking at the results of the experiment, it can be seen that the three-dimensional composite of the present invention has a piezoelectric sensor function, and at the same time it is possible to generate heat.

<Experimental Example 4 Comparison of exothermic state before and after drilling of the composite>

The extruded state of the composite of the Example was punched out before and after the puncture was compared.

As the experimental group, a composite of silicon resin and carbon nanotubes was used.

The physical force was applied to the same composite to form a hole or some fine shape to measure the temperature.

Figure 11 compares the exothermic state before and after drilling the three-dimensional composite of the present invention.

Referring to FIG. 11, the average temperature before the perforation of the composite is 34.3 ° C., and the average temperature after the perforation is about 36.2 ° C., but about 2 ° C. has been raised. It can be seen that the temperature is maintained continuously even if some parts are damaged.

This makes it possible to infer that there is no problem in the heat generation performance because the electrons flow away from the damaged parts even if damages such as holes and blemishes occur.

Therefore, it can be seen that the composite of the present invention produces a heating element by printing, and it is also possible to generate heat even when damage occurs, so that it can be processed.

DETAILED DESCRIPTION OF THE INVENTION The present invention is a three-dimensional composite including piezoelectric and / or heat-generating functions and a method of manufacturing the same, and a rubber and carbon material are mixed to have a piezoelectric sensor and a heat-generating function simultaneously. .

Claims (7)

Three-dimensional composite having a piezoelectric and heat-generating function is included on the outer peripheral surface of the steering wheel
The three-dimensional composite includes 85 to 99% by weight of silicone resin and 1 to 15% by weight of dry dispersed multiwall carbon nanotubes, and the wire is cured by impregnation and thermocompression.
Dry dispersed carbon nanotube surface resistivity is 1.0E + 00 to 1.0E + 03Ω / □,
When a 0-3 kgf / cm2 pressure is applied to the three-dimensional composite, the resistance is 10 ^4.4 to 10 ^6.6 Pa.cm,
Steering handle with three-dimensional composite with piezoelectric and exothermic function.
delete delete Multi-walled carbon nanotubes are dry dispersed (S100);
Mixing the silicone resin (85 to 99% by weight) and dry dispersed multi-walled carbon nanotubes (1 to 15% by weight) (S200);
Rolling the mixed composition (S300); And
Sizing the rolled composition and impregnating the electric wire to harden by thermal compression at a temperature of 100 to 250 ℃ (S400); formed three-dimensional composite having a piezoelectric and exothermic function is included on the outer surface of the steering wheel,
Dry dispersed carbon nanotube surface resistivity is 1.0E + 00 to 1.0E + 03Ω / □,
When a 0-3 kgf / cm2 pressure is applied to the three-dimensional composite, the resistance is 10 ^4.4 to 10 ^6.6 Pa.cm,
Steering handle manufacturing method comprising a three-dimensional composite having a piezoelectric and exothermic function.
delete delete delete

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