KR101316274B1 - Heating steering wheel comprising protection layer and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a heat steering handle including a protective layer and a method of manufacturing the same. Specifically, in the present invention, by forming a protective layer on the outer circumferential surface of the heat generating coating layer included in the steering wheel, it is possible to solve the problem of damage and deterioration of the heat generating coating layer by friction or liquid caused by the handle grip, and to ensure electrical stability. .

Steering wheel, protective layer, core part, synthetic resin layer, heating coating layer

Description

Heating steering wheel comprising a protective layer and a method for manufacturing the same

The present invention relates to a heat steering handle including a protective layer and a method of manufacturing the same.

In general, since the steering wheel of an automobile is exposed to an indoor space, the surface thereof maintains the same temperature as the interior. Therefore, the steering wheel drops to a very low temperature in winter, even without direct contact with the outside air, so that the driver feels cold air when operating after boarding.

Typically, the vehicle is equipped with a heating device so that when the driver adjusts the room temperature, the temperature of the steering wheel surface also gradually increases according to the room temperature.

However, since the vehicle air conditioner generates the hot wind required for heating by using the coolant, the engine coolant must be heated up to an appropriate temperature in order to discharge the warm air for the intended purpose. There was a problem.

In order to solve the above problems, a method of controlling the temperature by forming a heating coating layer on the steering wheel is known. The heating coating layer is formed on the outer circumferential surface of the synthetic resin layer in a steering wheel having a core portion and a synthetic resin layer. However, the exothermic coating layer may be damaged by friction due to the handle grip when the steering wheel is in use, and thus, the exothermic performance is deteriorated.

In addition, the exothermic coating layer is often exposed to liquids (cola, coffee, beverages, sweat (saline), detergents, soapy water, water, etc.). In this case, there is a problem in that the resistance of the heat generating coating layer is changed and the heat generating performance is lowered, or the heat generating coating layer is corroded and the durability is lowered.

The present invention has been made in consideration of the above-described problems of the prior art, and an object thereof is to provide a steering wheel including a protective layer and a manufacturing method thereof.

The present invention is a means for solving the above problems, the core portion; A synthetic resin layer formed on an outer circumferential surface of the core part; An exothermic coating layer formed on an outer circumferential surface of the synthetic resin layer; And

It provides a steering wheel including a protective layer formed on the outer circumferential surface of the heat generating coating layer.

According to another aspect of the present invention, there is provided a heat dissipating coating layer on an outer circumferential surface of a preform having a core part and a synthetic resin layer formed on an outer circumferential surface of the core part; And

It provides a method of manufacturing a steering wheel comprising a second step of forming a protective layer on the outer circumferential surface of the heating coating layer formed through the first step.

In the present invention, in the steering wheel including a core portion, a synthetic resin layer and a heat generating coating layer, a protective layer is formed on the outer circumferential surface of the heat generating coating layer. The protective layer may solve the problem of damage and deterioration of the heat-generating coating layer by friction or liquid due to the handle grip, and may ensure electrical stability.

The present invention core portion; A synthetic resin layer formed on an outer circumferential surface of the core part; An exothermic coating layer formed on an outer circumferential surface of the synthetic resin layer; And

It relates to a steering wheel comprising a protective layer formed on the outer circumferential surface of the heat generating coating layer.

Hereinafter, the steering wheel of the present invention will be described in more detail.

The shape of the steering wheel in the present invention is not particularly limited and may have various shapes applied in the field. In the present invention, the steering wheel 100 may be, for example, a shape as shown in FIG. 2 shows a cross section when the steering wheel 100 is cut in the direction of A-A ', the core part 110; Synthetic resin layer 120 formed on the outer peripheral surface of the core portion 110; An exothermic coating layer 130 formed on an outer circumferential surface of the synthetic resin layer 120; And a protective layer 140 formed on an outer circumferential surface of the exothermic coating layer 130.

The core part 110 of the present invention is located at the center of the cross section of the steering wheel. The material of the core portion is not particularly limited, and may be a conventional material used in the art.

Synthetic resin layer 120 of the present invention is formed on the outer peripheral surface of the core portion. The type of synthetic resin included in the synthetic resin layer is not particularly limited, and may be used generally used in the art. In the present invention, for example, ABS (Acrylonitrile Butadiene Styrene Copolymer) resin, polyurethane or expanded propylene can be used.

Here, the thickness of the synthetic resin layer is not particularly limited and may be appropriately selected according to the application to be applied.

The exothermic coating layer 130 of the present invention is formed on the outer circumferential surface of the synthetic resin layer.

The exothermic coating layer may be a general exothermic coating layer used in the art, it is preferable to use an exothermic coating layer containing carbon nanotubes and silver particles.

Carbon nanotubes included in the exothermic coating layer have excellent electrical conductivity and thermal conductivity. The type of carbon nanotubes used in the present invention is not particularly limited, and for example, single-walled carbon nanotubes, double-walled carbon nanotubes and multi-walled carbon nanotubes can be used. In the present invention, carbon nanotubes of any shape may be used regardless of shape, diameter and length.

The silver particles included in the exothermic coating layer reduce the contact resistance between the carbon nanotubes, thereby increasing the electrical conductivity and facilitating the adjustment of the resistance to the target resistance value.

The content of the silver particles can be freely adjusted according to the target resistance value. The content of the silver particles may be, for example, 100 parts by weight to 900 parts by weight based on 100 parts by weight of carbon nanotubes. When the content of the silver particles is less than 100 parts by weight, the resistance reduction effect may be lowered. When the content of the silver particles is more than 900 parts by weight, dispersion may be difficult.

The thickness of the exothermic coating layer may be, for example, 1 μm to 30 μm. If the thickness of the exothermic coating layer is less than 1 μm, the exothermic effect may be insignificant. If the exothermic coating layer is more than 30 μm, the exothermic coating layer may be damaged by external pressure or the like, and the manufacturing cost may be excessively increased.

The exothermic coating layer of the present invention may further include an electrode (not shown) connected on the exothermic coating layer. The electrode formed on the heating coating layer is connected to the wire to supply electricity to the heating coating layer. As the electrode, a material having a lower resistance than the heat generating coating layer is used, and serves to uniformly supply electricity to the heat generating coating layer. When electricity is supplied to the exothermic coating layer through the electrode, current flows through the conductive particles (carbon nanotubes and silver particles) in the exothermic coating layer, and heat is generated by the resistance so that the driver may feel warm when the steering wheel is operated. do.

In particular, carbon nanotubes can implement an electrical network phenomenon through which even if the particles are not attached and have a certain distance, they can be used in a small amount and have excellent dispersibility. Since there are few cases, a uniform heat distribution without a heat collection phenomenon is shown.

In addition, the carbon nanotubes can adjust the electrical properties (charge control) according to the diameter and the wound form, and does not require other means for temperature control.

In addition, since the resistance coefficient of the exothermic coating layer is close to zero due to chemical bonding of carbon nanotubes and silver particles, the exothermic coating layer may be continuously used.

The protective layer of the present invention is formed on the outer circumferential surface of the heat generating coating layer.

Since the protective layer is formed on the outer circumferential surface of the heat generating coating layer, it is possible to prevent damage caused by friction due to the handle grip when the steering wheel is used, and to prevent the deterioration of the heat generating performance caused by the liquid being in contact with the steering handle and the damage of the heat generating coating layer. In addition, the low voltage, but the heat-generating coating layer is generated by the current flows to generate the protective layer to improve the electrical stability.

The protective layer is formed of a coating liquid, and specifically, may be formed by applying and drying a conventional aqueous coating liquid and / or a solvent type coating liquid.

When the coating liquid is an aqueous coating liquid, the aqueous coating liquid may be prepared by dispersing a water-soluble resin in an aqueous solvent, and examples of the aqueous solvent may be water.

The water-soluble resin may be used at least one selected from the group consisting of polyvinyl alcohol resin, acrylic emulsion resin, epoxy resin, styrene-acryl copolymer and polyurethane.

The content of the water-soluble resin is preferably included in an amount of 10 parts by weight to 60 parts by weight with respect to 100 parts by weight of water. If the content of the water-soluble resin is less than 10 parts by weight, the protective layer forming effect may be insignificant. If it exceeds 60 parts by weight, the viscosity is increased and the workability may be lowered.

The aqueous coating liquid may further include a functional additive. Examples of the functional additives include stabilizers, antifoaming agents, flame retardants, and the like, and are preferably included in an amount of 0.2 parts by weight to 10 parts by weight based on any one of the components included in the aqueous coating solution. If the content of the functional additive is less than 0.2 parts by weight, there is a fear that the function of the additive may not be exhibited. If the content of the functional additive exceeds 10 parts by weight, the protective layer may be prevented from forming.

When the coating solution is a solvent type coating solution, the solvent type coating solution may be prepared by dispersing a solvent type resin in a solvent. Examples of the solvent may include alcohol.

The alcohol may be used without limitation the general alcohol used in the art, for example, may be used alkyl alcohol. More specifically, one or more selected from the group consisting of methyl alcohol, ethyl alcohol, isopropyl alcohol, and the like may be used, but is not limited thereto.

The solvent-type resin may be used at least one selected from the group consisting of resorcinol resin, polyvinyl butyral, polyvinyl ether, polyvinyl oxide, polyvinylacetate and the like.

The content of the solvent-type resin is preferably included in an amount of 10 parts by weight to 50 parts by weight with respect to 100 parts by weight of alcohol. If the content of the solvent-type resin is less than 10 parts by weight, the protective layer forming effect may be insignificant. If it exceeds 50 parts by weight, the workability may be lowered due to the increase in viscosity.

The solvent-based coating liquid may further comprise a functional additive. Examples of the functional additive include a stabilizer, an antifoaming agent, a flame retardant, and the like, and are preferably included in an amount of 0.2 parts by weight to 10 parts by weight based on any one of the components included in the solvent-based coating solution. If the content of the functional additive is less than 0.2 parts by weight, there is a fear that the function of the additive may not be exhibited. If the content of the functional additive exceeds 10 parts by weight, the protective layer may be prevented from forming.

The thickness of the protective layer is not particularly limited, and may be 10 μm to 100 μm. If the thickness of the protective layer is less than 10 μm, the electrical stability may be lowered. If the thickness of the protective layer is more than 100 μm, the protective layer may be damaged by external pressure or the like, and the manufacturing cost may be excessively increased.

As shown in FIG. 3, the steering wheel of the present invention may further include a cover layer 150 formed on the outer circumferential surface of the heating coating layer 140.

The cover layer may be formed of wood, wood pattern printing or leather.

The thickness of the said cover layer is not specifically limited, It can select suitably according to the use to be used.

In addition, the steering wheel of the present invention may further include a surface coating layer 160 formed on the outer circumferential surface of the cover layer 150 as shown in FIG. The surface coating layer is used to prevent damage to the steering wheel from the outside, in particular, it can be effectively applied when the cover layer is wood or wood pattern printing.

The surface coating layer may be formed of a material of a transparent material to make the shape of the cover layer formed on the inner circumferential surface of the surface coating layer easily visible to the outside. Examples of such a material include at least one selected from the group consisting of transparent synthetic resins such as fluororesin, urethane resin, and acrylic resin. In the present invention, it is also possible to use a coating film comprising an organosilicon compound and titanium oxide.

The present invention also includes a first step of forming a heat generating coating layer on the outer circumferential surface of the preform having a core portion and a synthetic resin layer formed on the outer circumferential surface of the core portion; And

A method of manufacturing a steering wheel comprising a second step of forming a protective layer on an outer circumferential surface of a heating coating layer formed through a first step.

The first step is to form a heat generating coating layer on the outer circumferential surface of the preform, the preform includes a core portion and a synthetic resin layer formed on the outer circumferential surface of the core portion.

The first step is (1) applying a coating liquid containing carbon nanotubes and silver particles; And

(2) may comprise the step of drying the coating solution applied in step (1).

The coating solution including the carbon nanotubes and the silver particles of step (1) may be prepared by dispersing the carbon nanotubes and the silver particles in a solvent.

The material that can be used as the solvent is not particularly limited and may be used at least one selected from the group consisting of water, ethanol, methyl ethyl ketone, isopropyl alcohol, toluene, N-methylpyrrolidone, ethyl acetate and butyl celusolve. have.

The content of the solvent is not particularly limited as long as the carbon nanotubes and the silver particles can be easily dispersed.

In addition, the coating solution may further include a dispersant from the viewpoint of ease of dispersion of carbon nanotubes and silver particles.

The dispersant may use one kind or a mixture of two or more kinds of a surfactant, a wet dispersant, an antifoaming agent, a surfactant, and a leveling agent.

The method of apply | coating a coating liquid to the outer peripheral surface of a preform is not specifically limited, For example, a spray coating method can be used.

The aperture and spray pressure of the spray nozzle used in spray application are not particularly limited and may be appropriately selected depending on the intended use.

In addition, the number of applications during the spray application is not limited, and may be applied once or two or more times.

Step (2) is to dry the coating liquid, and the coating liquid applied to the outer circumferential surface of the preform is dried at a temperature of 80 ° C. to 150 ° C. for 10 to 60 minutes. At this temperature and time, drying of the coating liquid occurs easily.

The second step is to form a protective layer on the outer circumferential surface of the heat generating coating layer.

The second step includes the steps of: (A) applying an aqueous coating solution containing a water-soluble resin to the outer circumferential surface of the exothermic coating layer; And

(B) may comprise the step of drying the aqueous coating solution applied in step (A) for 5 to 30 minutes at a temperature of 45 ℃ to 90 ℃.

As the water-soluble resin used in step (A), one or more selected from the group consisting of polyvinyl alcohol, acrylic emulsion resin, epoxy resin, styrene-acryl copolymer, polyurethane, and the like described above may be used.

The method of coating the aqueous coating liquid on the outer circumferential surface of the exothermic coating layer is not particularly limited, and for example, a spray coating method can be used. The spray coating method may form a protective layer with a uniform thickness on the outer circumferential surface of the exothermic coating layer.

 The aperture and spray pressure of the spray nozzle used in spray application are not particularly limited and may be appropriately selected depending on the intended use.

In addition, the number of applications during the spray application is not limited, and may be applied once or two or more times.

Step (B) is a step of drying the aqueous coating liquid applied to the outer circumferential surface of the exothermic coating layer, the drying is carried out for 5 to 30 minutes at a temperature of 45 ℃ to 90 ℃. Drying of the aqueous coating liquid at the above temperature and time is made easy.

The three steps may further include: (a) applying a solvent-type coating liquid containing a solvent-type resin to the outer circumferential surface of the exothermic coating layer; And

(b) may comprise the step of drying the solvent-type coating solution applied in step (a) for 5 to 30 minutes at a temperature of 45 ℃ to 90 ℃.

The solvent-type resin used in step (a) may be used at least one selected from the group consisting of resorcinol, polyvinyl butyral, polyvinyl ether, polyvinyl oxide, polyvinylacetate, and the like.

The method of apply | coating a solvent type coating liquid to the outer peripheral surface of a heat generating coating layer is not specifically limited, For example, a spray coating method can be used. The spray coating method may form a protective layer with a uniform thickness on the outer circumferential surface of the exothermic coating layer.

 The aperture and spray pressure of the spray nozzle used in spray application are not particularly limited and may be appropriately selected depending on the intended use.

In addition, the number of applications during the spray application is not limited, and may be applied once or two or more times.

Step (b) is a step of drying the solvent-type coating liquid applied to the outer peripheral surface of the exothermic coating layer, the drying is carried out for 5 to 30 minutes at a temperature of 45 ℃ to 90 ℃. At the above temperature and time, the solvent-based coating liquid can be easily dried.

The steering wheel manufacturing method of the present invention may further comprise the step of forming a cover layer on the outer circumferential surface of the heating coating layer. The method of forming the cover layer is not particularly limited, and a method used in the art may be used.

In addition, the steering wheel manufacturing method may further comprise the step of forming a surface coating layer on the outer peripheral surface of the cover layer. The method for forming the surface coating layer is not particularly limited, and methods used in the art may be used.

Example

Hereinafter, the present invention will be described in more detail through examples according to the present invention, but the scope of the present invention is not limited to the following examples.

Example  One

An exothermic coating solution containing carbon nanotubes and silver particles was applied to the outer circumferential surface of the preform, in which the polyurethane resin was injected, on the outer circumferential surface of the magnesium core, and dried for 30 minutes while gradually raising the temperature to 130 ° C., and having a thickness of 10 μm. Formed.

Applying an aqueous coating solution containing 30 parts by weight of the acrylic emulsion resin to 100 parts by weight of water on the outer peripheral surface of the formed heating coating layer, and dried at 90 ℃ for 30 minutes to form a protective layer having a thickness of 50 ㎛, the protective layer Form a cover layer on the outer circumferential surface of the

Steering steering wheel was prepared. Here, leather was used as the cover layer.

Example  2

Apply the exothermic coating solution containing carbon nanotubes and silver particles to the outer circumferential surface of the preform, in which the ABS resin is injected, on the outer circumferential surface of the magnesium core, and dry for 60 minutes while gradually increasing the temperature to 110 ° C. to produce a 10 μm thick exothermic coating layer. Formed.

Applying a solvent-type coating liquid containing 20 parts by weight of polyvinyl acetate with respect to 100 parts by weight of alcohol on the outer peripheral surface of the formed heating coating layer, and dried at 70 ℃ for 20 minutes to form a protective layer having a thickness of 30 ㎛, the protection A steering wheel was manufactured by forming a cover layer on the outer circumferential surface of the layer. Here, wood pattern printing was used as the cover layer.

1 shows a steering wheel.

Figure 2 shows an A-A 'cross section of the steering wheel according to the present invention.

Figure 3 shows an A-A 'cross section of another steering wheel according to the present invention.

Figure 4 shows an A-A 'cross section of another steering wheel according to the present invention.

≪ Description of reference numerals &

100: steering wheel 110: core portion

120: synthetic resin layer 130: heat generating coating layer

140: protective layer 150: cover layer

160: surface coating layer

Claims (16)

Core portion; A synthetic resin layer formed on an outer circumferential surface of the core part; An exothermic coating layer formed on an outer circumferential surface of the synthetic resin layer and including a chemical combination of carbon nanotubes and silver particles; And A steering formed on an outer circumferential surface of the exothermic coating layer and comprising a protective layer comprising at least one solvent-type resin selected from the group consisting of resorcinol resin, polyvinyl butyral, polyvinyl ether, polyvinyl oxide and polyvinylacetate. handle. The steering wheel of claim 1 wherein the synthetic resin layer comprises ABS resin, polyurethane or expanded polypropylene. delete The steering wheel according to claim 1, wherein the heating coating layer has a thickness of 1 µm to 30 µm. The steering wheel of claim 1 further comprising an electrode connected to the exothermic coating layer. delete delete delete delete The steering wheel according to claim 1, wherein the protective layer has a thickness of 10 µm to 100 µm. The steering wheel according to claim 1, further comprising a cover layer formed on an outer circumferential surface of the protective layer. The steering wheel according to claim 11, further comprising a surface coating layer formed on an outer circumferential surface of the cover layer. A first step of forming an exothermic coating layer comprising a chemical combination of carbon nanotubes and silver particles on an outer circumferential surface of the preform having a core portion and a synthetic resin layer formed on an outer circumferential surface of the core portion; And Solvent type coating solution comprising at least one solvent-type resin selected from the group consisting of resorcinol resin, polyvinyl butyral, polyvinyl ether, polyvinyl oxide and polyvinylacetate on the outer circumferential surface of the exothermic coating layer formed through the first step A method of manufacturing a steering wheel comprising the step of applying to form a protective layer. The method of claim 13, wherein the first step comprises: (1) applying a coating liquid including carbon nanotubes and silver particles; And (2) A method of manufacturing a steering wheel comprising the step of drying the coating solution applied in step (1). delete The method of claim 13, wherein the second step comprises drying the applied solvent-type coating solution for 5 to 30 minutes at a temperature of 45 ℃ to 90 ℃.

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