JP3188973U - Functional metal material with snow melting and heat shielding effect - Google Patents

Abstract

The object of the present invention is to provide a snow melting function effect of heat ray components contained in sunlight by providing two coating layers of a specific resin on the surface of a metal outer plate material such as a roofing material installed outdoors, in particular, aluminum. A functional metal material that can be used efficiently and contributes to a heat shielding effect.
A first step of forming a first coating layer having a heat conduction function on the surface of a metal material, and a second coating layer having an infrared absorption function on the surface of the first coating layer. The metal material is characterized in that it has a reflecting function for allowing the second layer to transmit and absorb the infrared light transmitted through the first coating layer and the second coating layer again.
[Selection] Figure 2

Description

The present invention relates to a laminated structure of a surface coating layer of a metal plate used as an outer plate material in the outdoors such as a roof of a house or an automobile. More specifically, the high infrared reflection characteristic and low radiation characteristic of an aluminum plate, and high heat conduction are provided. Using the rate characteristics, focusing on the infrared absorption characteristics, transmission characteristics, heat conduction characteristics, etc. of specific resins, a functional metal material that exhibits a snow melting function and a heat shielding function by the laminated structure of the coating film, and a method for producing the same Technology.

According to the data of "snow damage situation etc. (December 19, 2000)" released by the Fire and Disaster Management Agency, a total of 133 people were snow-covered from November 2011 to March 31, 2012 There were 95 people who died during the snow removal work such as snowing down the roof, and 28 people were “dead due to snowfall”, and the majority were due to snow removal work in the living environment.

The snow removal work is an essential work in an area where there is snowfall accompanying snow accumulation. However, with the recent aging and depopulation of labor, there is a demand for further labor saving and efficiency of snow removal work due to a shortage of labor. For this problem, if the amount of snow accumulation can be suppressed by some method even if it snows, it will lead to labor saving of snow removal work, so that the snow on the roof naturally falls due to gravity, the roof shape that is easy to remove snow, The snow melting mechanism is equipped, and measures are taken by painting and structure.

In the prior art, as a countermeasure by painting, for the purpose of improving the cooling efficiency of houses and automobiles, a film having a function of blocking, absorbing, or reflecting ultraviolet rays and infrared rays is arranged on the glass surface, or effective use of solar heat. For this purpose, various techniques have been developed, such as improving the infrared absorption rate by mixing carbon black into the coating layer.

Specifically, for example, an infrared reflective coating composition that effectively reflects infrared rays contained in sunlight and the like, and a road surface structure and a building roof structure that can prevent a temperature rise treated with the composition are provided. As a technology, “an infrared reflective coating composition containing a resin component having an infrared transmittance of 40% or more in the infrared wavelength region and one or more infrared reflective pigments having an infrared reflectance of 40% or more in the infrared wavelength region” There is a road surface structure and a building roof structure (see Patent Document 1) treated with an object and the composition.

In addition, in order to provide a thermal barrier coating that suppresses the temperature rise of the coating object due to sunlight while improving the aesthetics of the coating object, it contains “a white pigment having sunlight reflection characteristics and applied to the coating object It has an infrared reflection layer B and an infrared transmission layer A2 containing a black organic pigment that transmits infrared rays and applied to the surface of the infrared reflection layer B. The infrared transmission layer A2 is transmitted through the infrared transmission layer A and reaches the infrared reflection layer B. The infrared rays are reflected to the outside through the infrared ray transmission layer A2. The black organic pigment contained in the infrared ray reflection layer is perylene black having a higher infrared ray transmittance than the visible light transmittance. There is also a technique for providing a thermal barrier coating having a reflectance of 40% or more (see Patent Document 2).

Further, “an average including at least one selected from a near-infrared shielding component composed of fine particles having an average particle diameter of 200 nm or less including at least one selected from composite tungsten oxide, and titanium nitride, titanium oxynitride, and carbon black” It consists of a pigment composed of fine particles having a particle size of 200 nm or less and a binder component, and the content of the pigment is such that the peak intensity of total light reflection in the region of wavelength of 780 nm or less of the solar shading film is R1, and the solar radiation not containing the pigment When the peak intensity of total light reflection in the region of 780 nm or less of the shielding film is R0, the amount satisfies 0.15 ≧ (R0−R1) /R0≧0.03, and at least one of the binder components is a grease component. Sidoxypropyl group-containing alkoxysilane and aminopropyl group-containing alkoxysilane in a molar ratio of 2: 1 to 1: 1. Those with sunlight shielding film which is a reaction product obtained by reacting with enclosed, or "(see patent document 3) also.

However, these technologies require new materials such as highly effective materials for ultraviolet rays and infrared rays, dielectric multilayer film deposition, and carbon black, and are left with problems in terms of cost effectiveness. .

The present invention pays attention to this, focusing on the coating layer to be laminated with the base material, which can promote the melting of snow without increasing the cost by taking advantage of the conventional material properties, and melting the accumulated snow. In addition, the present invention provides a functional metal material that promotes evaporation, suppresses heat conduction by infrared radiation to the inner surface, and enhances a heat shielding effect and a heat retaining effect by reflection, and a method for producing the same.

JP 2006-273985 JP 2010-221100 A JP2008-194563

In view of the above problems, the present invention focuses on a coating layer to be laminated with a base material using conventional material characteristics, and can promote snow melting without increasing costs, and melting accumulated snow. In addition, the present invention aims to provide a functional metal material that promotes evaporation, suppresses heat conduction by infrared radiation to the inner surface, and enhances a heat shielding effect and a heat retaining effect by reflection, and a manufacturing method thereof.

The present invention is a functional metal material that mainly exhibits a snow melting function, and a first coating layer having far-infrared transmission characteristics is formed on a metal surface having infrared reflection characteristics, and the surface of the first coating layer. Forming a second coating layer having a far-infrared absorption function, and the metal surface again absorbs infrared rays transmitted through the first coating layer and the second coating layer in the second layer. A means having a reflection function is adopted.

Also, the present invention. In the functional metal material described above, by specifying a metal having a characteristic of high infrared reflectivity but low emissivity on the metal surface, means having a heat shielding function can also be adopted.

  In addition, the present invention can adopt a means in which the metal having the characteristics of high infrared reflectance and low emissivity is aluminum.

Further, the present invention can take a measure that the coating film of the first coating layer is applied with a thickness not exceeding 12 micrometers.

In addition, the present invention can also employ means for forming the first coating layer with a polyolefin resin base treatment agent and the second coating layer with an acrylic silicon resin.

Further, in the present invention, the first coating layer is a polyolefin-based resin base treatment agent, and a product name “Micchalon Multi” manufactured by Dyed Q Technology Co., Ltd. is used, and the second coating layer is It is also an acrylic silicon resin, and it is possible to adopt a means that is formed by a commercial product “Cera M Silicon 2” manufactured by Kansai Paint Co., Ltd.

  Moreover, this invention can also take the means by which the functional metal material in any one of the said is used as the construction member of the material for the purpose of snow melting or heat insulation, or both.

  In addition, the present invention can adopt means for using any one of the functional metal materials described above as a body member of an automobile for the purpose of melting snow or insulating heat or both.

According to the functional metal material of the metal material according to the present invention, the heat energy absorption rate of sunlight is improved compared to conventional metal materials, and the function of melting snow at the time of initial snow accumulation and the effect of heat insulation from the inside are demonstrated. To do.

It is explanatory drawing which shows the structure of the functional metal material which concerns on this invention. It is function explanatory drawing of the functional metal material which concerns on this invention.

The present invention is characterized in that by providing two coating layers on one surface of a metal plate, an excellent snow melting function and a heat insulating structure with low radiation characteristics to the inside are exhibited. Hereinafter, description will be given based on the drawings. FIG. 1 is an explanatory diagram showing a configuration of a functional metal material 10 according to the present invention. As shown in FIG. 1, the present invention forms a first coating layer 100 having infrared transmission characteristics on the surface of a metal material 300 as a base material, and further absorbs infrared rays on the surface of the first coating layer. A second coating layer 200 having a function is formed, and thereby two coating layers are formed. The metal material 300 is transmitted through the first coating layer 100 and the second coating layer 200. A material that has a reflection function for causing the second layer to transmit and absorb the infrared rays again and that does not easily radiate the opposite surface of the coating layer is selected.

FIG. 2 is a functional explanatory diagram of the functional metal material 10 according to the present invention. Free electrons in a metal vibrate in plasma, and the value at which the free electrons oscillate at the limit is called the plasma frequency. When light hits the metal surface, the light frequency is less than the plasma frequency. In the small case, the free electrons vibrate according to the light frequency, and at this time the light energy is used for free electron vibration, but the free electrons re-emit light having the same frequency as the original light. Therefore, as a result, light is blocked by free electrons and cannot enter the metal, and is bounced back by free electrons. Also, if the metal surface is rough, the infrared propagation direction is disturbed, such as bending or interference in the first coating layer 100 without regular reflection, and heat is absorbed again after reflection at the second coating layer. Will reduce the rate. The reason for the idea of the present invention was mainly how to prevent the snow accumulated on the roofs of houses and automobiles from being accumulated in the snow. Therefore, it is desirable to avoid the generation of heat in the metal layer 300 and the first coating layer 100 as much as possible. Therefore, the surface of the metal material 300 is preferably mirror-finished, and the first coating layer 100 is preferably a coating that is thinner than the wavelength of far infrared rays so that the first coating layer 100 has good transparency and does not change into heat. .

In FIG. 2, FIG. 2 (a) shows an infrared reflection state when there is no coating layer, and FIG. 2 (b) shows a case where two coating layers according to the present invention are formed. Infrared reflection status is shown. Specifically, for example, in the case where the metal material 300 is mirror-finished aluminum, the reflectivity is 80 to 85% (C) from Table 1, and therefore 15 to 20% (B) is absorbed. . On the other hand, in the functional metal material 10 according to the present invention, first of all, the infrared rays incident from the sunlight A are absorbed in the far-infrared absorption region D1 when passing through the second coating layer, and the first It passes through the far-infrared transmission region of the coating layer 100, reflects off the surface of the metal material 300, passes through the far-infrared transmission region of the first coating layer 100 again, and the far-infrared absorption region D2 of the second coating layer. And the remaining C is discharged. Therefore, the combination of the presence of the two coating layers of the present invention and the highly reflective metal material 300 raises the temperature of the second coating layer, and the second coating layer is a layer having a high thermal conductivity. Because of this, it has the effect of melting snow in case of snow. In FIGS. 1 and 2, the metal material 300, the first coating layer, and the second coating layer are drawn with uniform widths, but the actual thickness of the coating is not shown. The incident angle and reflection angle from sunlight in FIG. 2 are slightly bent in the first coating layer region by the thin film coating of the first coating layer 100. The film is not shown because it is a thin film shorter than the wavelength of far-infrared rays and has little effect on heat absorption in the second coating layer.

Examples of the metal 300 suitable as a material having the above-described reflection characteristics include aluminum, gold, silver, brass, copper, and the like. 1). This is because when the heat dissipation rate is lower, the heat shielding effect becomes higher when used on the roof of a house or the body of an automobile. Accordingly, in claim 2, the material is specified aluminum. The next best result was silver. Although it is superior in terms of infrared emissivity of non-oxidized surfaces of iron and copper, it is somewhat decoy in terms of increased emissivity during oxidation. I can say that.

The first coating layer 100 has very little far-infrared absorption effect, and in order to facilitate the change to heat in the second coating layer that has the far-infrared absorption effect, the coating layer does not exceed the far-infrared wavelength region. The first coating layer is formed in order to increase the thickness (not exceeding 12 micrometers) and to allow the metal material 300 and the second coating layer to adhere to each other for efficient heat conduction.

The second coating layer is a coating layer characterized by a good absorption rate of infrared rays and a high absorption rate of the heat ray (infrared ray) component contained in the sunlight A. Absorption predominates, raising the temperature and providing a contact surface that quickly communicates when snow is deposited in the early snowfall.

In the present invention, the back surface without the coating layer is in a state in which the metal is exposed as it is, but the metal surface with less oxidation has the characteristics that the infrared emissivity is small and the infrared reflectivity is high. As a result, in summer, even if the temperature rises due to radiant heat from outside, there is little radiative transmission to the inside. Further, in winter, there is little movement of heat due to radiation from the inside, and heat is reflected to the radiating side, so that heat dissipation other than circulation of the outside air inside can be suppressed. A list of emissivity of metals is shown below. According to Table 2, aluminum is considered to be most suitable.

For example, the functional metal material 10 according to claim 7 of the present application may be used as a metal roof member, an upper surface member of a bridge or a pedestrian bridge, etc.

For example, the functional metal material 10 according to claim 8 of the present application is used for roofing, bonnets, and trunks of aluminum automobiles, or for upper surfaces of trucks, containers, etc. It can be used.

The present invention is not limited to the above examples, and can be used in various fields such as agriculture, civil engineering, ships, architecture, and factory facilities. In particular, in regions with a lot of snow Y, industrial applicability is extremely high in the sense that various product development using the functional metal material according to the present invention can be considered.

10 Functional Metal Material 100 First Coating Layer 200 Second Coating Layer A Sunlight B1, B2 Metal Material Absorption C1, C2 Emission D1, D2 Far Infrared Absorption Area Y Snow Cover

Claims (8)

A functional metal material that demonstrates the function of melting snow,
On the metal surface with infrared reflection characteristics,
Forming a first coating layer having far infrared transmission characteristics;
Forming a second coating layer having a far-infrared absorption function on the surface of the first coating layer;
The functional metal material, wherein the metal surface has a reflection function for absorbing the infrared rays transmitted through the first coating layer and the second coating layer again in the second coating layer. 2. The functional metal material according to claim 1, wherein the functional metal material has a heat shielding function by specifying a metal having a high infrared reflectance and a low emissivity on the metal surface. Functional metal material.   The functional metal material according to claim 2, wherein the metal having characteristics of high infrared reflectance and low emissivity is aluminum. The functional metal material according to any one of claims 1 to 3, wherein the coating film of the first coating layer is applied with a thickness not exceeding 12 micrometers. 5. The first coating layer according to claim 1, wherein the first coating layer is formed of a polyolefin resin base treatment agent, and the second coating layer is formed of an acrylic silicon resin. Functional metal material. The first coating layer is a polyolefin-based resin base treatment agent, and is not used for public order and moral violation.
The functional metal material according to any one of claims 1 to 5, wherein the second coating layer is made of acrylic silicon resin (not shown for violation of public order and morals).   The building member which uses the functional metal material in any one of the said Claims 1-6 as a raw material for the purpose of snow melting, heat insulation, or both. A body member for an automobile using the functional metal material according to any one of claims 1 to 6 as a material for melting snow or heat insulation or both.