JP2003136618A - Heat sink material and interior material for vehicle made of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat sink material having a constitution of a high level heat sink performance and to provide an interior material for a vehicle. SOLUTION: The heat sink material with a laminated constitution comprises an uppermost layer made of a visible ray and near infrared ray permeability, far infrared non-permeability material, an absorbable base cloth made of a visible ray absorbable and infrared absorbable material and/or a base layer containing an ordinary temperature far infrared radiant filler as the rearmost layer of at least two or more layers laminated in the constitution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat dissipating material which can be applied as an interior material for vehicles such as automobiles and which has a significantly improved heat dissipating performance.

[0002]

2. Description of the Related Art The structure of a conventional interior material such as a floor carpet for a vehicle such as an automobile will be described with reference to the drawings.

FIG. 1 is a schematic side sectional view showing a conventional two-layer interior material for vehicle interior. Further, FIG. 2 is a schematic side cross-sectional view showing a conventional three-layer interior material for vehicle interior. Figure 3
FIG. 2 is a schematic side sectional view schematically showing how visible light and near infrared rays are incident on the interior material of FIG. 1. Figure 4
FIG. 3 is a schematic side sectional view schematically showing how visible light rays and near infrared rays are incident on the interior material including the three layers of FIG. 2.

As shown in FIG. 1, a conventional interior material for a vehicle, such as a floor carpet for a vehicle such as an automobile, has a nap layer 11 and an outermost skin and a base cloth layer 13 as shown in FIG. The innermost material 1 having a two-layer structure composed of the base cloth portion of the backmost layer formed, or as shown in FIG. 2, the outermost surface skin portion formed with the napped layer 11, the napped layer 11
A three-layered interior comprising a base cloth portion formed directly below the base cloth layer 13 and a base material layer 14 located immediately below the base cloth layer 13 and the backmost base material layer 14. There is the material 2, and the performance and improvement have been made by the fiber configuration of these parts in order to improve the cushioning property and the quietness in the vehicle interior.

For example, the napped layer 11 is made of a material 12a that absorbs visible rays and near infrared rays. The base cloth layer 13 stably fixes these napped layers 11. Further, the base material layer 15 is mainly made of a conventional sound absorbing material 16a such as fiber or urethane.

However, in the existing configuration, as shown in FIG. 3, visible rays and near infrared rays 20 are absorbed on the surface or inside of the napped layer 11 in the interior material 1 and emitted as far infrared rays 21, or As shown in 4, the interior material 2
Visible rays and near infrared rays 20 are absorbed on the surface and inside of the napped layer 11 in and are emitted as far infrared rays 21. As described above, in the existing configuration, the heat insulation effect of the base material layer is particularly large, and also the heat absorption of the skin material and the temperature rise due to re-radiation into the vehicle interior are caused. There is a problem that the temperature rises.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a heat dissipating material having a high-performance heat dissipating property and a vehicle interior material using the heat dissipating material. It is what

Further, the object of the present invention is to suppress the heat absorption of the outermost skin material, to suppress the re-radiation to the passenger compartment, to greatly reduce the heat insulation effect with the outside, and to efficiently radiate the heat to the outside. It is intended to provide a heat dissipating material and a vehicle interior material using the heat dissipating material, which can remarkably reduce the temperature rise in the passenger compartment by providing the structure.

[0009]

Therefore, the present inventors have
As a result of diligent studies to achieve the above object, in the conventional interior material structure, as shown in FIGS. 3 and 4, the presence of the outermost surface layer that does not transmit visible light and near-infrared rays once enters the interior material. It was discovered that the light rays and heat rays are converted into heat on the surface of the outermost layer and radiate the heat to the inside of the passenger compartment. It has also been found that the base material layer of the interior material acts as a heat insulating layer and retains the heat in the vehicle interior, so that the heat is further retained in the vehicle interior. Based on this knowledge, by adopting a new structure for the heat dissipation material and the vehicle interior material using the heat dissipation material, excellent heat dissipation performance, more specifically, light rays or heat rays incident on the heat dissipation material or the interior material, The present invention has been found to be capable of absorbing or absorbing heat on the layer side and imparting the capability of radiating or radiating heat (exhausting heat) from the back layer side to the outside without radiating or radiating heat to the outermost layer side (vehicle interior). Has been completed. That is, the present invention for achieving the above object is configured as follows for each claim.

According to a first aspect of the present invention, in a heat dissipation material having a laminated structure, an outermost surface layer made of a material transparent to visible rays and near infrared rays and non-transparent to far infrared rays, and visible ray absorption and infrared absorption are provided. A heat-dissipating material, characterized in that at least two layers of an absorptive base cloth layer made of a material and / or a base layer containing a room temperature far-infrared radiation filler are laminated and at least two layers are laminated. Is.

According to a second aspect of the present invention, in the heat dissipation material having a laminated structure, the outermost layer is a transparent thermoplastic resin or a napped layer made of thermoplastic fibers, and the layer immediately below is a transparent thermoplastic resin. Alternatively, a structure in which at least three layers are laminated, which is composed of a permeable base cloth layer composed of thermoplastic fibers, and further, a lower layer thereof is composed of a thermoplastic resin containing a room temperature far infrared radiation filler or a base material layer composed of thermoplastic fibers. It is a heat dissipating material.

According to a third aspect of the invention, in the heat dissipating material according to the first or second aspect, the outermost layer is a napped layer made of a transparent thermoplastic resin or thermoplastic fiber, and the layer immediately below is a lightness of 0. 1 to 6 of an absorbent base fabric layer made of a thermoplastic resin or a thermoplastic fiber, and further a lower layer thereof made of a base material layer made of a thermoplastic resin or a thermoplastic fiber containing a room temperature far infrared radiation filler. It is characterized in that it has a constitution in which at least one layer is laminated.

According to a fourth aspect of the present invention, in the heat dissipating material according to any one of the first to third aspects, the thermoplastic resin or the thermoplastic fiber used in the absorbent base fabric layer is carbon black and / or Alternatively, it is characterized by being kneaded with carbon fibers.

According to a fifth aspect of the present invention, in the heat dissipating material according to any one of the first to fourth aspects, the carbon black and the thermoplastic resin or thermoplastic fibers used in the absorbent base fabric layer are carbon black and And / or carbon fibers are kneaded in an amount of 0.1 to 30% by mass.

According to a sixth aspect of the present invention, in the heat dissipating material according to any one of the first to fifth aspects, as the room temperature far infrared ray radiating filler, inorganic powder particles such as TiO ₂ and Al are used.
₂ O ₃ , MgO, SiO ₂ and ₂ MgO · 2Al ₂ O ₃ ·
It is characterized by containing at least one kind selected from the group consisting of 5SiO ₂ .

According to a seventh aspect of the present invention, in the heat radiating material according to the sixth aspect, the room temperature far-infrared radiation filler is kneaded with 1 to 40% by mass of the thermoplastic resin or the thermoplastic fiber. It is characterized by.

The invention according to claim 8 is an interior material for a vehicle, characterized by using the heat dissipation material according to any one of claims 1 to 7.

The invention according to claim 9 is an interior material for a vehicle, wherein the interior material for a vehicle according to claim 8 is used on the entire surface or a part of a floor carpet portion.

According to a tenth aspect of the present invention, the vehicle interior material according to the eighth aspect is provided with the entire surface of at least one of a rear parcel part, an instrument part, various pillar parts, a roof panel part and a dash lower part, or An interior material for a vehicle, which is characterized in that it is partially used.

The invention according to claim 11 is an interior material for a vehicle, wherein the interior material for a vehicle according to claim 8 is used on the entire surface or a part of a seat portion of a vehicle.

[0021]

According to the present invention configured as described above, the following effects are obtained for each claim.

According to the first aspect of the invention, in the heat dissipating material having a laminated structure, a material which is transparent to visible light and near-infrared rays and non-transparent to far-infrared rays is used as the outermost layer, so that the surface is It is possible to suppress far-infrared radiation, and since far-infrared radiation emitted from the lower layer is not transmitted, it is possible to prevent temperature rise. In addition, by using an absorptive base fabric layer made of a visible light-absorbing and infrared-absorbing material and / or a base material layer containing a room temperature far-infrared radiation filler as the outermost layer, visible light rays passing through the outermost layer, Infrared rays can be absorbed, and far infrared rays emitted can be efficiently emitted to the back surface. Therefore, the heat insulating effect in the outermost layer can be significantly reduced, heat can be efficiently radiated from the outermost layer to the back side, the heat radiation efficiency can be improved, and the temperature rise of the atmosphere above the outermost layer can be reduced. Is something that can be done.

According to the second aspect of the present invention, in the heat dissipating material having a laminated structure, by using a napped layer made of a transparent thermoplastic resin or a thermoplastic fiber as the outermost layer, the distance on the surface is improved. You can suppress the infrared radiation,
It is possible to prevent the temperature from rising. In addition, the napped layer ensures a good appearance when used as a vehicle interior material. Further, since the napped layer is transparent, that is, it does not absorb visible light, heat generation in the outermost layer can be suppressed. Next, by using a transparent base fabric layer made of a transparent thermoplastic resin or thermoplastic fiber immediately below the napped layer, visible light and near infrared rays are transmitted through the napped layer and the permeable base fabric layer, It will be absorbed by the base material layer. That is, by not showing absorption of visible light, heat generation in the base fabric layer is suppressed, and since the underlying layer is the base material layer, absorption and radiation are directly performed in the base material layer. Be seen. As a result, it is possible to provide a heat-dissipating material with high efficiency and low cost, which is efficient. Further, since far infrared rays radiated from the lower base material layer are not transmitted, it is possible to prevent the temperature from rising. Furthermore, by using a base material layer made of a thermoplastic resin or a thermoplastic fiber containing a far-infrared radiation filler at room temperature as a lower layer of the transparent base cloth layer, visible light and near infrared rays that have passed through the outermost surface layer and the transparent base cloth layer. It becomes possible to efficiently radiate far infrared rays emitted to the back surface. In addition, three or more layers having the above-mentioned functions are laminated on each of the above-mentioned layers, so that heat is absorbed from the napped layer side and unidirectionally flows to the back side. You can get the effect.

According to a third aspect of the invention, in the heat dissipating material according to the first or second aspect, a napped layer made of a transparent thermoplastic resin or thermoplastic fiber is used as the outermost layer, so that the surface is It is possible to suppress far-infrared radiation, and since far-infrared radiation emitted from the lower layer is not transmitted, it is possible to prevent temperature rise. In addition, the napped layer ensures a good appearance when used as a vehicle interior material. Further, since the napped layer is transparent, that is, it does not absorb visible light, heat generation in the outermost layer can be suppressed. Next, an absorptive base fabric layer made of a thermoplastic resin or a thermoplastic fiber having a brightness of 0.1 to 6 is used immediately below the napped layer to secure the appearance and design of the surface. Furthermore, since the absorptive base fabric layer is colored in this lightness range, it is possible to efficiently absorb visible light and near infrared rays. Visible rays and near-infrared rays absorbed by the absorbent base fabric layer are emitted as far-infrared rays, but far-infrared rays have low permeability on the napped layer side, and therefore are absorbed by the base material layer as a lower layer. become. Furthermore, by using a base material layer made of a thermoplastic resin or a thermoplastic fiber containing a room temperature far infrared radiation filler as the lower layer of the absorbent base fabric layer, it becomes possible to efficiently radiate (heat radiation) to the back surface. In addition, since the base material layer is made of thermoplastic fiber, it can be provided with cushioning properties, and in terms of recycling, it can be reused by opening. In addition, in the heat dissipation material in which each of the above layers has the above function and three or more layers are laminated, it is as if the heat is absorbed from the napped layer side and flows unidirectionally to the back side. You can get a big effect as if you were there.

According to a fourth aspect of the present invention, in the heat dissipation material according to any one of the first to third aspects, the thermoplastic resin or the thermoplastic fiber used for the absorbent base cloth layer is carbon. By kneading black and / or carbon fiber, the absorption efficiency of visible light and near infrared rays is large, and the visible light rays and near infrared rays sufficiently absorbed by this absorptive base fabric layer are emitted as far infrared rays,
Far-infrared ray permeability is low on the napped layer side, so it can be more efficiently radiated (heat dissipation) to the lower surface, especially when a base material layer is provided below the absorbent base fabric layer. Is advantageous in that far infrared rays are sufficiently absorbed by the base material layer, and the room temperature far infrared radiation filling material of the base material layer enables efficient heat dissipation to the lower surface thereof. .

According to a fifth aspect of the invention, in the heat dissipating material according to any one of the first to fourth aspects, the thermoplastic resin or the thermoplastic fiber used in the absorbent base fabric layer is: By kneading carbon black and / or carbon fiber in an amount of 0.1 to 30% by mass, physical properties for maintaining processability such as sheet processing and spinning can be secured, and the lightness can be sufficiently reduced. It is advantageous in that it can sufficiently absorb light rays and near infrared rays.

In a sixth aspect of the present invention, as the room temperature far infrared radiation filling material, TiO ₂ , which is an inorganic powder or granular material,
Al ₂ O ₃ , MgO, SiO ₂ and 2MgO.2Al ₂ O
_At least 1 selected from the group consisting of 3.5 SiO ₂
The inclusion of seeds is advantageous in that they can radiate very efficiently at room temperature due to the far infrared ray emissivity of 80% or more with respect to these ideal black bodies.

[0028] According to the invention of claim 7, in the heat dissipating material of claim 6, the normal temperature far infrared radiation filler is 1 to 40 relative to the thermoplastic resin or the thermoplastic fiber.
By mass% kneading and / or fixing, it is advantageous in that a base material layer having excellent infrared radiation performance, washing durability in products, texture and the like can be obtained. When kneading further,
By setting the content in the range of 1 to 15% by mass, it is even more advantageous in that the physical properties for maintaining the processability such as sheet-like processing and spinning can be secured.

According to the invention described in claim 8, by using the heat dissipating material according to any one of claims 1 to 7 as an interior material for a vehicle, in a vehicle with particularly severe thermal conditions, This is useful in that the temperature rise in the vehicle interior can be reduced.

According to a ninth aspect of the invention, the interior material for a vehicle according to the eighth aspect is a portion which has a large area as a portion which is warmed by the incidence of visible light and near infrared rays from the window glass. It is advantageous in that the heat can be radiated most efficiently by using it on the whole surface or a part of a certain floor carpet portion. Further, it is useful in that heat can be efficiently dissipated without impairing the cushioning property and the quietness in the passenger compartment as compared with the conventional floor carpet.

According to a tenth aspect of the present invention, the vehicle interior material according to the eighth aspect is provided with a rear parcel part, an instrument part, which is a part which is easily heated to a high temperature in the vehicle interior by solar radiation.
By using it for all or part of at least one kind of various pillar parts, roof panel part and dash lower part,
It is useful in that it is possible to efficiently dissipate heat from these vehicle parts.

According to an eleventh aspect of the present invention, the vehicle interior material according to the eighth aspect is the entire surface of a vehicle seat portion, which is a portion which is apt to be heated to high temperature in the passenger compartment, or one of It is useful in that it can efficiently dissipate heat when used in the section.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below.

A first solution of the present invention is, in a heat dissipating material having a laminated structure, an outermost layer made of a material which is transparent to visible rays and near infrared rays and non-transparent to far infrared rays, and visible light absorption and infrared absorption. Characterized in that at least two layers including an absorptive base fabric layer made of a conductive material and / or a base layer containing a room temperature far infrared radiation filler are laminated at least two layers. is there.

The visible light and near infrared ray transmissive material and far infrared ray non-transmissive material constituting the outermost layer are not particularly limited as long as they satisfy the following transmittances, but are not limited to thermoplastic resins. Resin, thermoplastic elastomer,
Examples include thermoplastic materials such as thermoplastic rubber. Also,
The form (shape) of the material that is transparent to visible light and near infrared rays and non-transparent to far infrared rays is not particularly limited, and various shapes such as a powder shape, a fiber shape, or a sheet shape can be mentioned. . The material that is transparent to visible light and near infrared rays and non-transparent to far infrared rays is preferably a thermoplastic resin or a thermoplastic fiber, and more preferably a transparent thermoplastic resin or a thermoplastic fiber. The thermoplastic resin may be of any shape unless otherwise specified, and the thermoplastic fiber may be of any material unless otherwise specified.

Here, visible light and near infrared transmittance,
The far infrared ray non-transmissive material preferably has a visible light ray and near infrared ray transmittance of 60% or more, but in order to effectively function as the outermost layer as described later, it is 30%.
It should be above. On the other hand, the far infrared ray transmittance is preferably as low as possible, less than 60%, preferably 30%.
It is the following.

The shape of the outermost layer may be appropriately determined in consideration of the appearance, cushioning property, recyclability, etc., depending on the intended use and site of use. For example, various molding shapes such as a sheet shape using a thermoplastic resin may be used, or a woven fabric, a knitted fabric or a non-woven fabric obtained by processing a thermoplastic fiber into a sheet shape may be used. Further, these woven fabrics, knitted fabrics, and non-woven fabrics may include those obtained by various fiber processing treatments, such as those obtained by nap processing. The napped material is, for example, the tufted skin of Experimental Example 1 in which the fibers (threads) of the napped layer are fluffed on the base fabric layer or the base material layer below the napped layer to form a carpet. Also, fibers (threads) that also become napped are formed as large loops on the surface of the base fabric layer or the base fabric layer as a large loop during knitting of the lower fabric layer or the base fabric such as woven fabric, knitted fabric, or non-woven fabric. Examples include a method in which the napped layer and the lower layer are processed together, such as those which are projected and cut as necessary (see FIG. 5).

The outermost layer may be colored within a range that does not impair the above properties. For such coloring, conventionally known coloring agents such as pigments and dyes can be used. Furthermore, other conventionally known additives may be used in the outermost layer as long as the above properties are not impaired.

In the outermost layer, the transmittance of both visible light and near infrared rays exceeds 30%, and the transmittance of far infrared rays may be less than 30%. The outermost layer will be described in more detail in a preferred embodiment described later.

Next, by using an absorptive base fabric layer and / or a base material layer as the outermost layer, the absorptive base fabric layer absorbs visible light and near-infrared rays that have passed through the outermost surface layer into visible light absorptivity and infrared light. It becomes possible to absorb it by an absorbent material and convert it into heat to efficiently radiate it to the back surface (heat dissipation). Also, in the base material layer, normal temperature far infrared radiation receiving visible and near infrared rays that have passed through the outermost layer. Far infrared rays emitted from the material can be efficiently emitted to the back surface. Here, when the absorbent base cloth layer and the base material layer are used together as the outermost layer, the absorbent base cloth layer and the base material layer may be integrated to form one layer, It may have two layers. In the case of two layers, it is desirable to form the base material layer so as to be closer to the outermost layer side than the absorbent base fabric layer.

Here, the visible light and infrared ray absorbing materials used for forming the absorbing base fabric layer include thermoplastic resins, thermoplastic elastomers, and thermoplastic resins in which carbons such as carbon black and carbon fibers are kneaded. Examples include thermoplastic materials such as rubber. Further, the form (shape) of the visible light and infrared ray absorbing material is not particularly limited, and various molding shapes such as powder shape, fiber shape, sheet shape and the like can be mentioned. The absorbent base fabric layer will be described in detail in a preferred embodiment described later.

Further, as the room temperature far infrared radiation filler used for forming the base material layer, transition metal element oxide-based ceramics, natural ores and natural carbides are known. In the present invention, these may be used alone or in combination of two or more.

The transition metal element oxide-based ceramics include TiO ₂ , SiO ₂ , ZrO ₂ , Al ₂ O ₃ and M.
gO, BaSO ₄ , MnO ₂ , Fe ₂ O ₃ , ZrSiO ₂ ,
CoO, CuO, CrO ₃ , TiO, TiN, ZrC,
Fine particles of metal oxides such as TiC and SnO ₂ 2MgO
It contains fine particles of these composite metal oxides such as 2Al ₂ O ₃ .5SiO ₂ (cordierite) and oxides of rare earth metals such as neodymium, lanthanum and yttrium, and further contains a small amount of silica and alkali metal oxides. , An alkaline earth metal oxide, a Group 8 metal oxide, a phosphorus compound and the like may be contained. Mica, tourmaline (tourmaline), aurastone, etc. are known as the above-mentioned natural ores. Known examples of the natural carbonized product include carbonized seaweed into fine powder, charcoal represented by Bincho charcoal, carbon black, carbon fiber and the like.

Among these, 80 against an ideal black body
% Of inorganic powder with high far infrared emissivity
O ₂ , Al ₂ O ₃ , MgO, SiO ₂ and 2MgO.2A
Those containing at least one selected from the group consisting of 1 ₂ O ₃ .5SiO ₂ are desirable, and those containing at least one of these are more preferable.

Such a room temperature far infrared radiation filling material is
Far infrared rays over a wide wavelength range of 4 to 20 μm or more can be efficiently radiated. Here, 4 to 20 μm or more means that the wavelength range of 4 μm or more is far infrared ray and the wavelength range of 20 μm or more is far infrared ray. This is because it may be. In addition, the far-infrared emissivity in this specification shall measure far-infrared rays over a wavelength range of 2000 to 100000 nm.

Further, the base material layer may be any material containing a room temperature far infrared radiation filler, and a base material layer composed of a room temperature far infrared radiation filler is also included in the scope of the present invention. . The method of including the room temperature far infrared radiation filler in the base material layer is not particularly limited, and for example, the room temperature far infrared radiation filler is kneaded with the thermoplastic material which is the main raw material of the base material layer. May be used, or a room temperature far-infrared radiation filler may be fixed to the surface of the thermoplastic material, particularly the thermoplastic fiber, or after the thermoplastic material is used to form a base material layer, the base material layer is formed. A room temperature far infrared radiation filler may be fixed on the surface, but from the viewpoint of uniform dispersibility, durability and the like, it is desirable to knead with a thermoplastic material. further,
Examples of the case where the base material layer is composed of a room temperature far infrared radiation filler include, for example, a case where a non-woven fabric made of carbon fiber, which is one of the room temperature far infrared radiation filler, is used as a base material layer. There is no limitation to these. By doing so, it is possible to form a base material layer excellent in heat dissipation use without impairing the high room temperature far infrared radiation property of the filler.

Further, in the base material layer, in order to enhance the far infrared radiation performance, one type of room temperature far infrared radiation filler may be used alone, or two or more types may be mixed and used. In addition,
Examples of the thermoplastic material that is the main raw material of the base material layer include a thermoplastic resin, a thermoplastic elastomer, and a thermoplastic rubber. Examples of the shape (shape) of the thermoplastic material include various shapes such as powder shape, fiber shape, and sheet shape. The thermoplastic material is preferably a thermoplastic resin or a thermoplastic fiber.

The shape of the base material layer may be appropriately determined in consideration of appearance (designability), cushioning property, recyclability, sound absorbing property, etc., depending on the intended use and site of use. For example, various shapes such as a sheet shape may be used, or a woven fabric, a knitted fabric, or a non-woven fabric obtained by processing fibers into a sheet shape may be used. Further, these woven fabrics, knitted fabrics, and non-woven fabrics include those subjected to various processing treatments.

In forming the above-mentioned base material layer, the total amount when the room temperature far-infrared radiation filler is kneaded with the thermoplastic material is
It is necessary to secure the physical properties for maintaining the processability such as sheet processing and spinning, and it is 1 with respect to the total mass of the thermoplastic material.
˜15% by mass, preferably 3 to 10% by mass.
Of the thermoplastic materials, when fixing (fixing) to the surface of the thermoplastic fiber using a fixing agent etc., there are no particular restrictions, and far infrared radiation performance, washing durability in products, texture, etc. are taken into consideration. 1 to 40% by mass, preferably 3 to 20% by mass with respect to the fiber mass.

The far-infrared emissivity of the material used as the room temperature far-infrared emissive filler used for the base material layer is preferably 70% or more with respect to the ideal black body.
More preferably, 80% or more makes it possible to radiate far infrared rays very efficiently. The far infrared ray radiation amount is radiated more as the temperature is higher, but in the case of a textile product, it is preferable that the radiation amount has a high radiation ability at a temperature near a low temperature, that is, at 30 to 40 ° C. Absent. The base material layer will be described in more detail in a preferred embodiment described later.

Generally, such a room temperature far infrared ray radiative filling material is often used as a heat insulating material by being kneaded with fibers of clothes such as gloves and socks. In this case, a far infrared emitting material is used for the purpose of maintaining the temperature on the heat source side.

In the present invention, it has been found that efficient use of heat can be achieved by using these materials as a filler for the base material layer which is the backmost layer of the heat dissipation material for heat dissipation from a heat source. It is a thing. The base material layer will be described in more detail in a preferred embodiment described later.

Next, as a preferred embodiment of the first solving means of the present invention, the outermost layer is a napped layer made of a transparent thermoplastic resin or fiber, and the layer immediately below is a lightness of 0.1 to 0.1.
At least three layers consisting of an absorptive base fabric layer made of thermoplastic resin or thermoplastic fiber of No. 6, and a base layer made of a thermoplastic resin or thermoplastic fiber containing a room temperature far infrared radiation filler thereunder. It is characterized by having a laminated structure. With such a preferred embodiment, the heat dissipation performance is further improved.

As described above, in the outermost layer, by using a material which is transparent to visible light and near infrared rays and non-transparent to far infrared rays, it is possible to suppress the emission of far infrared rays on the surface, and to radiate from the lower layer. Since it does not transmit far infrared rays,
It is possible to prevent the temperature from rising. Further, in a preferred embodiment, the outermost layer is a napped layer, so that the appearance is ensured when used as a vehicle interior material. Further, in a preferred embodiment, by using a transparent thermoplastic resin or a thermoplastic fiber, the napped layer is transparent, that is, it does not exhibit absorption of visible light and near-infrared light, the outermost layer. Generation of heat in the can be suppressed. The term "transparent" as used herein means that the total light transmittance defined by JIS K 7105 is 60% or more. The heat dissipation performance is further improved by combining the napped layers having the above transmittance or higher.

Typical resins used for these thermoplastic resins or thermoplastic fibers are polyolefin resins such as polyethylene and polypropylene, (meth) acrylic resin (polyacrylonitrile resin), polyamide (nylon), polyester and poly. Examples thereof include vinyl chloride. These may be used alone or in combination of two or more. In a particularly preferred embodiment, a transparent material may be used.

In consideration of recyclability, it is desirable to use fibers made of thermoplastic resin.

Fibers made of these thermoplastic resins preferably contain polyester as a main component from the viewpoint of mechanical strength, processability and flowability. The polyester referred to in the present invention means, for example, polyethylene terephthalate (PE
T), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), polyethylene isophthalate (PE
I), polybutylene isophthalate (PBI), poly ε
In addition to caprolactone (PCL), etc., PET in which the ethylene glycol component is replaced with another glycol component (for example, polyhexamethylene terephthalate (PH
T)) or a terephthalic acid component substituted with another different dibasic acid component (polyhexamethyleneisophthalate (PHI), polyhexamethylenenaphthalate (PH)
N)) etc. In addition, copolymerized polyesters containing these polyesters as constituent units, for example, block copolymers of PBT and polytetramethylene glycol (PTMG), copolymers of PET and PEI, copolymers of PBT and PBI, and PBT and PCL A copolymer whose main repeating unit is polyester may be used, such as a copolymer.

In forming the outermost layer, particularly the napped layer, using the fibers made of these thermoplastic resins, if necessary,
The outermost layer may contain an adhesive component. As such an adhesive component, it is preferable to use a binder fiber of a core-sheath type, a side-by-side type or the like, but it is not particularly limited. By using the adhesive component, it is possible to improve the resilience and durability of the outermost layer, particularly the napped layer, such as the waist, tension and cushioning property.

When felt (which means a sheet-like member composed of remarkably entangled fibers) is used as the thermoplastic fiber material constituting the outermost layer, the adhesive component is
Although a thermosetting resin is mainly used, there is no particular problem, and a thermoplastic resin or a binder fiber can be used.
In addition to the napped layer, the same adhesive component may be contained in a base cloth layer, a base material layer, and the like described later.

The thickness of the outermost layer is appropriately determined in consideration of cushioning properties, design properties, appearance, etc., depending on the intended use and site of use such as interior materials for vehicles, and is not particularly limited. It should be noted that it is sufficient if the thickness is about the same as the outermost layer (napped layer) used for the conventional interior materials for vehicles as shown in FIG. 1 and FIG. And a thickness suitable for transmitting near infrared rays is 3 to 5 mm
It is a degree.

Next, the layer immediately below the outermost layer (napped layer) is
It is composed of an absorbent base fabric layer made of a thermoplastic resin or a thermoplastic fiber having a brightness of 0.1 to 6. Since the layer immediately below the outermost layer is the absorptive base fabric layer having the brightness of 0.1 to 6, the appearance of the surface and design can be secured. Furthermore, since the absorptive base fabric layer is colored in this lightness range, efficient absorption of visible light and near-infrared light can be achieved as described above. The brightness referred to here is JIS Z 872.
The lightness in the Munsell color system defined in 1 is shown. Here, the hue and chroma (saturation) are not particularly touched, as long as the lightness is within this range, sufficient hue and chroma absorption of visible light and near-infrared rays is performed. Further, the chromatic color and the achromatic color are not particularly limited for the same reason.

As a method of coloring the absorbent base fabric layer within the above range of lightness, (of the absorbent base fabric layer or its material)
Applying a paint to the surface, the original coating (abbreviation for undiluted solution coloring,
Any method such as dyeing, kneading of granules, etc. may be used. By using a thermoplastic resin or thermoplastic fiber colored to have a brightness of 0.1 to 6 as the visible light and infrared absorbing material, it is possible to efficiently absorb visible light and near infrared rays. Preferably,
Since the absorbent base fabric layer is made of a thermoplastic fiber having a brightness of 0.1 to 6, the shape flexibility and the moldability are improved. In terms of recycling, it can be reused by opening the fiber.

The thermoplastic resin or thermoplastic fiber before being colored to have a brightness of 0.1 to 6 is the same as the thermoplastic resin or thermoplastic fiber constituting the outermost layer (nap layer). Things are available.

The thickness of the absorbent base fabric layer is appropriately determined in consideration of cushioning properties, design properties, appearance, etc., depending on the intended use, site of use, etc. of the interior material for the vehicle. It should be noted that there is no particular limitation, as shown in FIG. 1 and FIG.
It is sufficient if the thickness is the same as that of the base fabric layer used in the conventional interior material for vehicle as shown in FIG.

The visible light and near infrared rays absorbed by the absorbent base layer are radiated as far infrared rays.
Carbon-based materials such as carbon black and carbon fiber, which are suitable visible light and infrared absorbing materials, are also far-infrared radiation fillers at room temperature, and thus emit far infrared radiation by heat generated by absorbing visible light and near infrared radiation. This is because it can be done. ), The far-infrared ray has low permeability on the outermost surface (napped layer) side, so that it is further absorbed by the base material layer as the lower layer. Therefore, by including a room-temperature far-infrared radiation filler in this base material layer, efficient heat dissipation to the back surface side becomes possible.

Preferably, the base material layer is made of fibers, so that the interior material can have a cushioning property, and in terms of recycling, it can be reused by opening the fibers.

Each layer has the above function.
By stacking layers or more, a great effect can be obtained as if heat is absorbed from the napped layer side and flows unidirectionally to the back side.

Preferably, the absorbent base fabric layer is made of a thermoplastic resin or a thermoplastic fiber so as to have a brightness of 0.1 to 6, more preferably a thermoplastic resin or a thermoplastic fiber and carbon black and It is to use the thing colored by kneading / or carbon fiber. With such a configuration, it becomes possible to radiate heat more efficiently.

The absorptive base fabric layer has a brightness of 0.1 to 6
It is preferable to use carbon black, carbon fiber or the like as a material used for coloring so that This is because the carbon-based material has good absorption efficiency of visible light and near-infrared light, and a small amount of kneading, for example, 0.1 mass with respect to the mass of the thermoplastic resin or thermoplastic fiber used for the absorbent base fabric layer. Even with a kneading ratio of about%, the absorption efficiency is greatly improved. The upper limit of the kneading amount is 30% by mass. The kneading amount less than this can sufficiently reduce the lightness and sufficiently absorb visible light and near infrared rays.

The heat dissipating material according to the first solution of the invention has two or more layers of the outermost layer and the outermost layer, preferably three or more layers of the napped layer, the absorbent base fabric layer and the base material layer. Any other material may be used, and it may be formed by further stacking other layers as long as the effects of the present invention are not impaired.

The above is a description of each constituent element of the embodiment of the first solving means of the present invention. Hereinafter, such an embodiment will be described with reference to the drawings.

FIG. 5 is a schematic side sectional view showing an interior material for a vehicle, which is a typical embodiment of the first solving means of the present invention and which is a heat dissipating material having two layers. Further, FIG. 6 is a schematic side sectional view showing an interior material for a vehicle, which is a preferred embodiment of the first solving means of the present invention and is made of a heat dissipation material composed of three layers. FIG. 7 is a schematic side sectional view schematically showing how visible light rays and near infrared rays are incident on the heat dissipation material of FIG.
FIG. 8 is a schematic side sectional view schematically showing how the visible light and the near infrared rays are incident on the heat dissipation material of FIG.

As shown in FIG. 5, a napped layer 11 is provided as a heat dissipating material according to the first solution of the present invention, which is used as an interior material for a vehicle such as a floor carpet for a vehicle such as an automobile. The heat-dissipating material 5 having a two-layer structure including the outermost surface skin portion formed and the backmost base cloth portion on which the base cloth layer 13 is formed, or the napped layer 11 is formed as shown in FIG. Outermost skin layer, base cloth layer 13
A heat-dissipating material 6 having a three-layer structure including a base cloth portion which is a layer immediately below the outermost surface layer in which the base material is formed, and a base material portion which is the lowermost layer below the base cloth layer in which the base material layer 15 is formed. Can be illustrated. With the configuration of each of these parts, the cushioning property and the quietness (sound absorption) in the vehicle interior can be improved as in the conventional case.

Furthermore, the outermost napped layer 11 of the heat dissipating members 5 and 6 of this embodiment is made of a material 12b that transmits visible light and near infrared light. Further, the base cloth layer 13 of the heat dissipation materials 5 and 6 of the present embodiment is an absorptive base cloth layer made of the material 14b that absorbs visible light and near infrared light, and the napped layer 1
1 is fixed stably. The base material layer 15, which is the backmost layer of the heat dissipation material 6, is made of a material 16b to which a room temperature far infrared radiation filler is added.

In the heat dissipation member 5 of the present embodiment, as shown in FIG. 7, the visible light rays and the near infrared rays 20 transmitted through the napped layer 11 are absorbed by the surface of the absorbent base cloth layer 13, and the far infrared rays 21. However, since the far infrared rays 21 in the napped layer 11 have low transparency, they are mainly emitted to the back surface side. Further, in the configuration of the heat dissipation material 6 of the present embodiment, as shown in FIG. 8, the visible light and the near infrared rays 20 that have been transmitted through the napped layer 11 and absorbed by the absorbent base fabric layer 13 are similar to those in FIG.
It is emitted as far infrared rays 21. Further, since the base layer 15 to which the far infrared radiation filler is added is present as the lower layer, the radiation performance here is also increased, and the radiation is further emitted to the back surface side. As described above, in the configuration of the heat dissipation materials 5 and 6 of the present embodiment, two or more layers having the above-described functions are laminated on each layer, so that heat is absorbed from the napped layer 11 side and the back surface is obtained. It is possible to obtain a large effect as if flowing unidirectionally toward the absorbent base fabric layer 13 or the base material layer 15 side of the layer. Therefore, for example, in an interior material for an interior using the heat dissipating materials 5 and 6 of the present embodiment, compared with an interior material having a conventional structure, heat absorption by the napped layer 11 of the skin material and temperature due to re-radiation into the vehicle interior. The rise can be prevented, and the performance of radiating heat to the outside is greatly improved. Therefore, it can greatly contribute to alleviating a remarkable temperature rise in the vehicle compartment during parking under the scorching sun in midsummer.

The second means of solving the problems of the present invention is that, in a heat dissipation material having a laminated structure, the outermost layer is made of a thermoplastic resin or thermoplastic fiber, preferably a napped fiber made of a fiber made of a thermoplastic resin. Substrate consisting of a layer, a layer directly below the layer containing a transparent base fabric layer made of a transparent thermoplastic resin or a thermoplastic fiber, and a layer below the layer made of a thermoplastic resin or a thermoplastic fiber containing a room temperature far infrared radiation filler. It is characterized in that it has a constitution in which at least three or more layers are laminated. Even with this configuration,
It is possible to greatly improve the performance of radiating heat to the outside of the room, as compared with the interior material having the conventional structure.

In the heat dissipating material according to the second solving means of the present invention, unlike the structure of the heat dissipating material according to the first solving means described above, a transparent thermoplastic resin or thermoplastic fiber is used in the layer immediately below the outermost layer. It is intended to improve the heat dissipation performance by using a transparent base fabric layer that is transparent to visible light and near infrared rays and is not transparent to far infrared rays. By using such a transparent base cloth layer, visible light and near infrared rays are transmitted through the napped layer and the transparent base cloth layer and are absorbed by the base material layer. Since the heat rays absorbed here are radiated as far infrared rays, it is necessary that the napped layer and the base cloth layer do not transmit far infrared rays.

Since the transparent base fabric layer, which is the layer immediately below the outermost layer, is transparent, that is, does not exhibit absorption of visible light, generation of heat in the transparent base fabric layer is suppressed, and ,
Since the lower layer is the base material layer, absorption and radiation are directly performed in the base material layer (radiation layer). As a result, it is possible to obtain an efficient interior material having a heat-dissipating property, which is reduced in price.
The term “transparency” as used herein refers to JIS K 710 as described above.
It means that the total light transmittance defined by 5 is 60% or more. The heat dissipation performance is improved by combining the permeable base cloth layers having the above transmittance or higher.

The napped layer and the base material layer of the heat dissipation material according to the second solving means of the present invention are the same as the napped layer and the base material layer of the heat dissipation material according to the first solving means of the present invention. . Therefore, in order to avoid duplication, the description here is omitted.

Further, regarding the transparent thermoplastic resin or thermoplastic fiber used for the transparent base fabric layer of the heat dissipating material according to the second solving means of the present invention, the heat dissipating material according to the first solving means of the present invention described above is used. It is the same as the transparent thermoplastic resin or thermoplastic fiber used for the napped layer (more specifically, the visible light and near infrared ray transmissive material and far infrared ray non-transmissive material of the outermost layer). Therefore, in order to avoid duplication, the description here is omitted.

The heat dissipating material according to the second solution of the invention is not limited as long as it has three or more layers of the napped layer, the transparent base cloth layer and the base material layer, and does not impair the effects of the present invention. It may be formed by laminating another layer within the range.

The above is a description of each constituent element of the embodiment of the second solving means of the present invention. Hereinafter, such an embodiment will be described with reference to the drawings.

FIG. 9 is a schematic side sectional view showing a heat dissipating material (in-vehicle interior material) consisting of three layers, which is a typical embodiment of the second solving means of the present invention. FIG. 10 is a schematic side sectional view schematically showing how visible light rays and near infrared rays are incident on the heat dissipation material of FIG. 9.

As shown in FIG. 9, a napped layer 11 is provided as a heat dissipation material used as an interior material for an interior of a vehicle used for a floor carpet of a vehicle such as an automobile, etc. according to the second solution of the present invention. The outermost skin layer formed,
A three-layer structure having a base cloth portion which is a layer immediately below the outermost surface layer on which the base cloth layer 13 is formed, and a base material portion which is the backmost layer below the base cloth layer on which the base material layer 15 is formed. The heat radiation material 9 can be illustrated. With the configuration of each of these parts, the cushioning property and the quietness (sound absorption) in the vehicle interior can be improved as in the conventional case.

Furthermore, the napped layer 11 which is the outermost layer of the heat dissipating material 9 of this embodiment is made of a material 12b which transmits visible light and near infrared light. In addition, the base fabric layer 13 of the heat dissipation material 9 of the present embodiment is a transparent base fabric layer made of a material 14c that is transparent to visible light and near-infrared rays and is not transparent to far-infrared rays,
The napped layer 11 is stably fixed. Further, the base material layer 15 which is the backmost layer of the heat dissipation material 9 is made of the material 16b to which the room temperature far infrared radiation filler is added.

In the structure of the heat dissipation material 9 of this embodiment, as shown in FIG.
As shown in FIG. 5, the visible light and the near infrared rays 20 transmitted through the napped layer 11 and the transparent base fabric layer 13 have a base material layer 15 to which a far infrared radiation filler is added, so that the base material It is absorbed by the surface of the layer 15 and is emitted to the back side as far infrared rays 21. As described above, in the structure of the heat dissipation material 9 of the present embodiment, each layer is laminated with three or more layers having the above-mentioned function, so that heat is absorbed from the napped layer 11 side and the back layer is formed. It is possible to obtain a great effect as if flowing in one direction to the base material layer 15 side.
Therefore, for example, in the interior material for vehicle interior using the heat dissipation material 9 of the present embodiment, as compared with the interior material having the conventional structure, heat absorption in the napped layer 11 of the skin material and temperature rise due to re-radiation into the vehicle interior occur. It can be prevented, and the performance of radiating heat to the outside is greatly improved. Therefore, it can greatly contribute to alleviating a remarkable temperature rise in the vehicle compartment during parking under the scorching sun in midsummer.

Regarding the thickness of each layer of the heat-dissipating material of the present invention, the parameter that fulfills the function of each layer is determined by the transmittance and the like regardless of the above-mentioned embodiments. , ・ Thickness suitable for transmission of visible light and near infrared: 3 to 5
mm, ・ Thickness suitable for absorption of visible and near infrared rays: 1 mm
The following is suitable for the radiation of far-infrared rays: about 5 to 30 mm is appropriate, but it is appropriate in consideration of the intended use and other characteristics (for example, design, sound absorption, cushioning, etc.). ,
The optimum thickness of each layer may be determined.

The method of fixing (stacking) each layer of the heat dissipation material of the present invention is not particularly limited,
Depending on the material and form of each layer, an optimal method can be appropriately used rather than a conventionally known fixing (lamination) method.
For example, when fixing layers made of fibers, different types of fibers can be laminated in multiple layers by a fiber processing technique such as woven or knitting processing or nonwoven processing. For this purpose, there are methods such as using thermoplastic polyethylene powder, using a thermosetting phenol resin adhesive, and adhering the thermoplastic resin (fiber, film, etc.) of each layer by heat fusion, It should not be limited to these.

Next, the vehicle interior material according to the present invention is characterized by using the above-mentioned heat dissipation material of the present invention. It can be said that it is effective to use the heat dissipating material of the present invention as a vehicle interior material. This is because it is particularly difficult to reduce the heat inside the vehicle compartment in a vehicle with particularly severe thermal conditions, and the use of the heat-dissipating material of the present invention as a vehicle interior material effectively dissipates heat outside the vehicle compartment. It is because it can improve.

The vehicle interior material of the present invention is effectively used for a floor carpet portion. As a part that is heated by the incidence of visible light and near infrared rays from the window glass, the part with a large area is the floor carpet part, which is the part that can radiate heat most efficiently. At this time, the vehicle interior material can be set on the entire surface or a part of the floor carpet portion. This is because it is economical to set the interior material for a vehicle of the present invention only in a specific portion when the incident light strikes only the specific portion, and an efficient heat dissipation effect can be obtained.

Further, in the vehicle, when the temperature inside the passenger compartment becomes high,
Although very slight, heat flows from the passenger compartment to the outside through the floor carpet. By using the vehicle interior material of the present invention, this heat flow can be increased, and from this, it becomes possible to radiate heat to the outside very efficiently.

The vehicle interior material of the present invention is effectively used for the entire surface of at least one of the rear parcel portion, the instrument portion, various pillar portions, the roof panel portion and the dash lower portion, or a part thereof.

It is also effective to use it on the entire surface or a part of the vehicle seat.

The parts of these vehicles are the parts that are easily exposed to the sunlight in the passenger compartment and become high in temperature. By using the present invention for these parts, it is possible to efficiently radiate heat to the outside.

An embodiment of a vehicle part in which the vehicle interior material according to the present invention can be used will be described with reference to the drawings.

FIG. 11 is a perspective view of the interior of a vehicle for explaining the parts of the vehicle that can be applied when the vehicle interior material according to the present invention is used as an automobile interior material. Figure 11
As shown in FIG. 5, when the vehicle interior material according to the present invention is used as an automobile interior material, the dash insulator 5 is used.
1, floor carpet 52, floor panel tunnel portion 53, rear parcel portion 54, instrument panel upper portion 55, pillar portion 56, roof panel portion 57, seat portion 58, and the like.

[0097]

By the interior material of the present invention, the performance of radiating heat to the outside is greatly improved as compared with the interior material having the conventional structure.

[0098]

EXAMPLES Examples of the present invention will be shown below.

Experimental Example 1 The napped layer was formed by tufting the fibers (threads) of the napped layer (when making a non-woven fabric thereunder) using tufted epidermis made of high-transmissivity uncolored polyester fiber (diameter 70 μm). Carpet-like; tuft skin thickness (fiber length) 3-10 mm
2% by mass of carbon black (particle diameter 25 nm) in uncolored polyester which is a fiber raw material.
A polyester fiber (diameter 40 μm) kneaded and spun into a non-woven fabric to form a non-woven fabric (unit weight: 600 g / m ² ,
A thickness of 5 mm was prepared to form an absorptive base fabric layer having a lightness of 0.2, and a vehicle interior material composed of a two-layer heat dissipation material in which a nap layer and an absorptive base fabric layer were laminated was obtained.

The fiber material for the base fabric layer is made of visible light.
An uncolored polyester having a near infrared transmittance of 82% and a far infrared transmittance of 23% was used.

Experimental Example 2 Polyester was coated with cordierite (2MgO.2Al ₂ O ₃
5% by mass of inorganic powder of 5SiO ₂ (diameter 1 μm)
Non-woven fabric (weight per unit area 1) using kneaded fibers (25 μm diameter)
000 g / m ² , thickness 30 mm) was prepared and used as a base material layer. This base material layer is used instead of the absorbent base fabric layer of Experimental Example 1, and the napped layer is directly planted on the non-woven fabric of the base material layer and laminated to obtain a vehicle interior material composed of a heat dissipation material having a two-layer structure. Obtained.

The fiber raw material for the base material layer includes visible light and
An uncolored polyester having a near infrared transmittance of 82% and a far infrared transmittance of 23% was used.

Experimental Example 3 The base material layer prepared in Experimental Example 2 was laminated on the back surface of the base fabric layer of the automotive internal material of Experimental Example 1 to obtain a vehicle internal material composed of a three-layer heat dissipation material.

Experimental Example 4 As the base cloth layer, uncolored polyester fiber (diameter 40 μm) was used.
m) non-woven fabric (Basis weight: 600 g / m ² , thickness: 5 m
m) was prepared, and a vehicle interior material made of the same heat dissipation material as in Experimental Example 3 was obtained except that the permeable base cloth layer was used.

Experimental Example 5 TiO ₂ (diameter: 1 μm) was used as an inorganic powder material to be kneaded into the base material layer.
Other than the above, a vehicle interior material made of the same heat dissipation material as in Experimental Example 3 was obtained.

Experimental Example 6 The inorganic powder particles to be kneaded into the base material layer were Al ₂ O ₃ (diameter 1 μm)
Other than the above, a vehicle interior material made of the same heat dissipation material as in Experimental Example 3 was obtained.

Experimental Example 7 A vehicle interior material made of the same heat-dissipating material as in Experimental Example 3 was obtained except that MgO (diameter: 1 μm) was used as the inorganic powder particles kneaded into the base material layer.

Experimental Example 8 Except that SiO ₂ was used as the inorganic powder material to be kneaded into the base material layer,
A vehicle interior material made of the same heat dissipation material as in Experimental Example 3 was obtained.

Experimental Example 9 Polyester fiber (diameter 40 μm) in which carbon fiber (fiber diameter 0.2 μm, fiber length 1 μm) was kneaded in the base cloth layer
m) was used, except that an absorbent base fabric layer having a brightness of 0.3 was used,
A vehicle interior material made of the same heat dissipation material as in Experimental Example 3 was obtained.

Experimental Example 10 A colored polyester fiber (diameter 70
A vehicle interior material made of the same heat dissipating material as in Experimental Example 3 was obtained except that (.mu.m) was used.

Experimental Example 11 Heat dissipation similar to that of Experimental Example 3 except that a polyester fiber (diameter 40 μm) in which 1% by mass of carbon black was kneaded was used for the base fabric layer and an absorptive base fabric layer having a brightness of 5.2 was used. A vehicle interior material made of wood was obtained.

Experimental Example 12 A vehicle interior material made of the same heat-dissipating material as in Experimental Example 3 was obtained, except that a colored polyester fiber (diameter 40 μm) was used for the base cloth layer and the brightness was 4.6. It was

Since the base fabric layer of Experimental Example 12 has a large value of lightness and is transparent to visible light / near infrared and non-transparent to far infrared radiation, it is not transparent to the absorbent base fabric layer. This is an example of a base fabric layer that has both properties of the base fabric layer and can be handled intermediately.

Comparative Example 1 A colored polyester fiber having a low transmittance (diameter 70 μm) was formed in the napped layer.
m) and colored polyester fiber (diameter 40
Example 3 except that the lightness was 6.8 and uncolored polyester fiber (diameter 25 μm) was used for the base material layer.
A vehicle interior material made of the same heat-dissipating material was obtained.

Comparative Example 2 An interior material for a vehicle was prepared which was the same as in Experimental Example 3 except that uncolored polyester fiber (diameter 25 μm) was used for the base material layer.

Comparative Example 3 A colored polyester fiber having a low transmittance (diameter 70 μm) was provided in the napped layer.
A vehicle interior material made of the same heat dissipation material as in Experimental Example 3 was obtained except that m) was used.

Test Examples The following tests were carried out on the vehicle interior materials obtained in the above experimental examples and comparative examples.

Test Example 1 (Evaluation of Heat Dissipation Performance) A sample (vehicle interior material) was laid on one side of the evaluation box, and the inside of the box was heated by an artificial solar lamp to measure the temperature inside the box and the surface temperature outside the box. The ambient temperature is 40 degrees in the box.
℃, outside temperature was 30 ℃.

Test Example 2 (Measurement of Sun Ray Transmittance) Visible Light / Near Infrared Transmittance Measurement Visible light / near infrared ray transmittances of the napped layer, the transparent base fabric layer and the base material layer were measured by the material of each layer (details: Was performed according to JIS R 3106 for the uncolored polyester or the colored polyester of the fiber raw material of each layer.

Far-Infrared Transmittance Measurement The far-infrared transmittance of the napped layer, the transparent base cloth layer, and the base material layer was measured with respect to the material of each layer (specifically, uncolored polyester or colored polyester of the fiber raw material of each layer). Then, a far infrared spectrophotometer (FT-IR) was used. The evaluation range of far infrared rays was 2000 to 100000 nm.

Test Example 3 (Measurement of Far-Infrared Emissivity) The far-infrared emissivity of the base material layer was measured by using a simple emissivity for a non-woven fabric made of fibers containing a kneaded material or fibers not containing a kneaded material. It was performed using a total (D and S AERD).

Test Example 4 (Measurement of Far Infrared Radiation Dose) For the measurement of the far infrared radiation dose of the sample (vehicle interior material), the radiation dose on the back surface side of the sample was measured using MM0036 manufactured by B & K.

Tables 1 and 2 show the outline and test results of the interior materials obtained in the above-mentioned experimental examples and comparative examples.

[0124]

[Table 1]

[0125]

[Table 2]

In the results shown in Table 2, in comparison with the interior material of Comparative Example 1, the outside surface temperature of the box (the back surface temperature of the sample)
However, those having a temperature increase of 3 ° C or more are indicated by ⊚, those having a temperature increase of 1 ° C or more less than 3 ° C are indicated by ○, those having a temperature increase of less than 1 ° C are indicated by Δ, and those having a temperature equal to or lower than are indicated by X.

From Tables 1 and 2, the heat dissipation performance of the interior materials produced in the experimental examples was improved.

Further, the heat dissipation performance was not improved in the comparative example manufactured with the specifications outside the scope of the claims.

[0129]

INDUSTRIAL APPLICABILITY The heat dissipating material of the present invention and the vehicle interior material using the heat dissipating material have significantly improved heat dissipation performance as compared with the interior material having the conventional structure. Therefore, in the heat dissipating material and the vehicle interior material using the same of the present invention, the solar radiation received at the outermost portion of the radiating material is to be radiated from the outermost surface portion of the radiating material to the outermost layer and further to the outside. The temperature rise due to re-radiation into the passenger compartment can be significantly reduced.

In the present invention, the heat absorption due to absorption of visible light and infrared rays in the outermost layer is suppressed, the re-radiation of these light rays and heat rays into the passenger compartment is suppressed, and the heat insulation effect in the outermost layer is greatly reduced. By radiating visible light or near infrared rays reaching the bottom layer as far infrared rays to the back side, heat can be efficiently radiated from the bottom layer to the outside, and temperature rise inside the vehicle can be reduced. Is.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view showing a conventional interior material.

FIG. 2 is a schematic side sectional view showing a conventional interior material.

FIG. 3 is a schematic diagram showing how visible light and near infrared rays are incident on a conventional interior material.

FIG. 4 is a schematic view showing how visible light and near infrared rays are incident on a conventional interior material.

FIG. 5 is a schematic side cross-sectional view showing an interior material according to the present invention.

FIG. 6 is a schematic side cross-sectional view showing an interior material according to the present invention.

FIG. 7 is a schematic diagram showing how visible light and near infrared rays are incident on the interior material according to the present invention.

FIG. 8 is a schematic diagram showing how visible light and near infrared rays are incident on the interior material according to the present invention.

FIG. 9 is a schematic side cross-sectional view showing an interior material according to the present invention.

FIG. 10 is a schematic diagram showing how visible light and near infrared rays are incident on the interior material according to the present invention.

FIG. 11 is a schematic view of an interior material installed in a vehicle as viewed from the vehicle interior side.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Conventional interior material, 2 ... Conventional interior material, 5 ... Interior material of this invention, 6 ... Interior material of this invention, 9 ... Interior material of this invention, 11 ... Standing layer, 12a ... Standing layer, 12b ... Visible light and near infrared ray transmissive, far infrared ray impermeable napped layer, 13 ... Base cloth layer, 14a ... Conventional base cloth layer, 1
4b ... Absorbent base fabric layer, 14c ... Transparent base fabric layer, 15 ... Base material layer, 16a ... Conventional base material layer, 16b ... Normal temperature far infrared radiation filler kneaded base material layer, 20 ... Visible light and Near infrared, 21 ...
Far infrared ray, 51 ... Dash lower section, 52 ...
Floor carpet section, 53 ... Floor panel tunnel section, 54 ... Rear parcel section, 55 ... Instrument panel section, 56 ... Pillar section, 57 ... Roof panel section,
58 ... Seat section.

Continued front page    F-term (reference) 3B088 FA01 FA02 FB02 FB06 FC01                       GA01 HA01                 4F100 AA18B AA19B AA20B AA21B                       AA37B AA37C AD11B AD11C                       AK01A AK01B AK41 BA03                       DG01A DG01C DG11B DG11C                       DG16A GB33 JB16A JB16B                       JB16C JD10B JN01A JN01B                       JN01C JN08A

Claims (11)

[Claims] 1. In a heat dissipation material having a laminated structure, an outermost layer made of a material which is transparent to visible rays and near infrared rays and non-transparent to far infrared rays, and an absorbent base cloth layer made of a material which absorbs visible rays and infrared rays, A heat-dissipating material, characterized in that at least two or more layers of a backmost layer using a base material layer containing a normal temperature far-infrared radiation filler are laminated. 2. A heat dissipation material having a laminated structure, wherein the outermost layer is a nap layer made of a transparent thermoplastic resin or thermoplastic fiber, and the layer immediately below is a transparent layer made of a transparent thermoplastic resin or thermoplastic fiber. A base layer made of a thermoplastic resin or a thermoplastic fiber containing a far-infrared radiation filler at room temperature.
A heat-dissipating material comprising a structure in which at least three layers are laminated. 3. The heat dissipating material according to claim 1, wherein the outermost layer is a napped layer made of transparent thermoplastic resin or thermoplastic fiber, and the layer immediately below is a thermoplastic resin having a brightness of 0.1 to 6. Or consisting of an absorbent base fabric layer consisting of thermoplastic fibers, further lower layer consisting of a base material layer consisting of a thermoplastic resin or thermoplastic fibers containing normal temperature far infrared radiation filler,
A heat-dissipating material comprising a structure in which at least three layers are laminated. 4. The thermoplastic resin or thermoplastic fiber used for the absorbent base fabric layer is kneaded with carbon black and / or carbon fiber, and the thermoplastic resin or thermoplastic fiber is kneaded. Heat dissipation material. 5. The carbon black and / or carbon fiber is kneaded in an amount of 0.1 to 30% by mass with respect to the thermoplastic resin or the thermoplastic fiber used for the absorbent base fabric layer. The heat dissipation material according to any one of 4 above. 6. A room temperature far infrared ray radiating filler, which is at least selected from the group consisting of TiO ₂ , Al ₂ O ₃ , MgO, SiO ₂ and 2MgO.2Al ₂ O ₃ .5SiO ₂ , which is an inorganic powder. The heat dissipating material according to claim 1, wherein one type is contained. 7. The heat dissipating material according to claim 6, wherein the room temperature far infrared radiation filler is kneaded or fixed in an amount of 1 to 40% by mass with respect to the thermoplastic resin or the thermoplastic fiber. 8. An interior material for a vehicle, which uses the heat dissipating material according to any one of claims 1 to 7. 9. The vehicle interior material according to claim 8, which is used on the entire surface or a part of the floor carpet portion. 10. The vehicle interior according to claim 8, wherein the vehicle interior is used for at least one of the rear parcel portion, the instrument portion, the various pillar portions, the roof panel portion and the dash lower portion. Material. 11. The vehicle interior material according to claim 8, which is used on the entire surface or a part of a vehicle seat portion.