Vehicle ceiling interior material

Abstract

To provide a vehicle ceiling interior material that suppresses heat radiation reaching a boarding space from a body outer plate of a ceiling without using a metal film that reflects infrared ray.SOLUTION: Provided is a vehicle ceiling interior material 100 covering a body outer plate 11 of a ceiling 10B from a boarding space 10A side, in the ceiling 10B of an automobile 10. The vehicle ceiling interior material includes a stacking structure 105 in which a plurality of layers are stacked from the body outer plate 11 side toward the boarding space 10A side. The stacking structure 105 includes a ceiling base material 120 that is a layer blended with a heat radiation absorption material M10 that absorbs heat radiation R1B reaching the inside of the layer.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a ceiling interior material for a vehicle.

Background Art

[0002] In a vehicle, when the outer panel of the vehicle body ceiling is heated by sunlight, heat is radiated from the outer panel of the vehicle body. When this heat reaches the passenger space, it raises the temperature of the passenger space, which can be a factor in increasing the cooling energy in summer.

[0003] As a technique for dealing with this problem, for example, the technique of a vehicle ceiling material disclosed in Patent Document 1 is known. In this technique, an infrared reflecting layer is adhered to the fiber layer on the back side for reinforcing the vehicle ceiling material. Thereby, the vehicle ceiling material shields the heat radiated from the outer panel of the vehicle body ceiling.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, an aluminum vapor deposition film (metal film) is used for the infrared reflecting layer of the vehicle ceiling material. For this reason, in the above prior art, countermeasures against short circuits such as providing a protective layer for insulating the vehicle interior electrical wiring and the infrared reflecting layer in the vehicle ceiling material were necessary.

[0006] The present disclosure provides a ceiling interior material for a vehicle that suppresses heat radiation reaching the passenger space from the outer panel of the vehicle body ceiling without using a metal film that reflects infrared rays.

Means for Solving the Problems

[0007] First, the first disclosure is an interior material for a vehicle ceiling that covers the outer panel of the vehicle body ceiling from the boarding space side at the ceiling of the vehicle. The interior material has a laminated structure in which a plurality of layers are laminated from the outer panel side of the vehicle body toward the boarding space side. The laminated structure includes a heat radiation absorption layer that is a layer in which a heat radiation absorption material that absorbs heat radiation reaching the inside of the layer is blended.

[0008] According to the interior material for a vehicle ceiling according to the first disclosure, the heat radiation absorption layer included in the laminated structure absorbs heat radiation that attempts to enter the boarding space from the outer panel of the vehicle body ceiling with the heat radiation absorption material. As a result, it is possible to provide an interior material for a vehicle ceiling that can suppress heat radiation reaching the boarding space from the outer panel of the vehicle body ceiling without using a metal film that reflects heat radiation.

[0009] Here, the interior material for a vehicle ceiling according to the first disclosure may be an interior material for a vehicle ceiling according to the second disclosure described later. This interior material for a vehicle ceiling according to the second disclosure is such that the heat radiation from the heat radiation absorption material is non-directional.

[0010] According to the interior material for a vehicle ceiling according to the first disclosure, in the heat radiation absorption layer, the temperature of the heat radiation absorption material that has absorbed heat radiation rises. Then, the heat radiation absorption material dissipates the absorbed heat energy by heat radiation. Here, according to the interior material for a vehicle ceiling according to the second disclosure, the heat radiation from the heat radiation absorption material has no directivity and is radiated in all directions. For this reason, a part of the heat radiation from the heat radiation absorption material is directed outside the boarding space. As a result, the interior material for a vehicle ceiling can suppress heat radiation reaching the boarding space.

[0011] Here, the interior material for a vehicle ceiling according to the first disclosure or the second disclosure may be an interior material for a vehicle ceiling according to the third disclosure described later. This interior material for a vehicle ceiling according to the third disclosure is such that the heat radiation absorption layer is provided so as to cover the entire outer panel of the vehicle body from the boarding space side.

[0012] According to the vehicle ceiling interior material according to the third disclosure, when heat radiated from any part of the body outer panel of the ceiling attempts to reach the passenger compartment, it passes through the heat radiation absorption layer of the laminated structure. As a result, the vehicle ceiling interior material can suppress the heat radiation that passes through the heat radiation absorption layer of the laminated structure and reaches the passenger compartment.

[0013] Here, the vehicle ceiling interior material according to the first disclosure or the second disclosure may be the vehicle ceiling interior material according to the fourth disclosure described later. This vehicle ceiling interior material according to the fourth disclosure, wherein the laminated structure includes a heat insulation layer that is a layer having a thermal conductivity smaller than that of the heat radiation absorption layer, and the heat insulation layer is provided at a position closer to the passenger compartment side than the heat radiation absorption layer.

[0014] According to the vehicle ceiling interior material according to the first disclosure, in the heat radiation absorption layer, the temperature of the heat radiation absorber that has absorbed heat radiation rises. Then, the heat radiation absorber transfers the absorbed heat energy to the surroundings by heat conduction. Here, according to the vehicle ceiling interior material according to the fourth disclosure, the heat insulation layer suppresses the heat of the heat radiation absorption layer from being transferred to the passenger compartment side by heat conduction. As a result, the vehicle ceiling interior material can suppress the heat reaching the passenger compartment.

Advantages of the Invention

[0015] By having the above-described respective configurations, the present disclosure can provide a vehicle ceiling interior material that suppresses heat radiation reaching the passenger compartment from the body outer panel of the ceiling without using a metal film that reflects infrared rays.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0017] <First Embodiment> As shown in FIG. 1, the ceiling interior material 100 for a vehicle according to the first embodiment of the present disclosure is provided on the ceiling 10B of the automobile 10 so as to cover the entire body outer panel 11 of the ceiling 10B from the boarding space 10A side. As shown in FIG. 2, the ceiling interior material 100 for a vehicle has a laminated structure 105 in which two layers of a ceiling base material 120 and a skin material 110 are laminated in this order from the body outer panel 11 side toward the boarding space 10A side. Here, the automobile 10 corresponds to the "vehicle" in the present disclosure.

[0018] Here, it is assumed that the body outer panel 11 of the ceiling 10B in the automobile 10 is heated up to about 120°C by the sunlight R0. Therefore, heat radiation R1 is radiated from the heated body outer panel 11. This heat radiation R1 mainly includes infrared rays belonging to a wavelength range of, for example, about 1 μm to 30 μm, and partly includes electromagnetic waves of far-infrared rays to sub-millimeter waves (radio waves) having a longer wavelength than this.

[0019] <Configuration of Skin Material> The skin material 110 is a layer that constitutes the design surface of the ceiling 10B of the automobile 10 (see FIG. 1), and improves its aesthetic property. In the present embodiment, the skin material 110 is constituted by, for example, a layer of non-woven fabric.

[0020] <Configuration of Ceiling Base Material> The ceiling base material 120 is a layer that exhibits strength to maintain the shape of the vehicle ceiling interior material 100. The ceiling base material may be composed of a mixed laminate of multiple layers or may be composed of only a single layer. When the ceiling base material is a mixed laminate of multiple layers, the ceiling base material can be formed by laminating a layer of a thermosetting resin (for example, semi-rigid foamed polyurethane) and a layer of glass fiber for ensuring strength. When the ceiling base material is composed of only a single layer, the ceiling base material can be, for example, a layer of a mat-shaped thermoplastic sheet material in which glass fiber and polypropylene fiber are mixed. In these cases, the ceiling base material can have a strength that does not deform under a force of about the self-weight of the vehicle ceiling interior material 100.

[0021] As shown in FIG. 2, a heat radiation absorbing material M10 is incorporated into the ceiling base material 120. The heat radiation absorbing material M10 absorbs a part of the heat radiation R1B, which is a part of the heat radiation R1 reaching from the body outer plate 11 of the ceiling 10B into the layer of the ceiling base material 120. Thereby, the ceiling base material 120 suppresses the heat radiation R1A that passes through the ceiling base material and reaches the passenger space 10A among the heat radiation R1. That is, the ceiling base material 120 corresponds to the "heat radiation absorbing layer" in the present disclosure. In the present embodiment, carbon black that can widely absorb electromagnetic waves belonging to the wavelength range of ultraviolet rays to infrared rays is used as the heat radiation absorbing material M10.

[0022] The heat radiation absorbing material M10 may be incorporated into any part of the ceiling base material 120. When the ceiling base material is composed of a laminate of a layer of a thermoplastic resin and a layer of glass fiber, the heat radiation absorbing material can be incorporated into the layer of the thermoplastic resin. When the ceiling member is composed of only a single foamed resin layer, the heat radiation absorbing material can be incorporated into the foamed resin constituting the foamed resin layer. In FIG. 2, the heat radiation absorbing material M10 is depicted as being uniformly dispersed throughout the ceiling base material 120.

[0023] In this embodiment, the ceiling base material 120 is provided so as to cover the entire body outer plate 11 of the ceiling 10B from the boarding space 10A side. Therefore, when heat radiated from any part of the body outer plate 11 of the ceiling 10B attempts to reach the boarding space 10A, it passes through the ceiling base material 120.

[0024] The heat radiation absorber M10 absorbs the above-described heat radiation R1B, causing its temperature to rise. The heat radiation absorber M10 whose temperature has risen dissipates the absorbed heat energy as heat radiation R2. Here, the heat radiation R2 from the heat radiation absorber M10 is non-directional. That is, the heat radiation R2 from the heat radiation absorber M10 has no directivity and is radiated in all directions.

[0025] <Function of the ceiling interior material for a vehicle> Next, the function of the ceiling interior material 100 for a vehicle according to the above-described embodiment will be mainly described with reference to FIG. 2.

[0026] In the automobile 10, when the body outer plate 11 of the ceiling 10B is heated by sunlight R0, heat radiation R1 from this body outer plate 11 toward the interior side of the automobile 10 is generated. This heat radiation R1 attempts to pass through the ceiling base material 120 and enter the boarding space 10A. However, a part of the heat radiation R1, namely heat radiation R1B, is absorbed by the heat radiation absorber M10. Therefore, the heat radiation R1A that passes through the ceiling base material 120 and reaches the boarding space 10A is only a part of the heat radiation R1.

[0027] Also, the temperature of the heat radiation absorber M10 that has absorbed the heat radiation R1B in the ceiling base material 120 rises. Then, the heat radiation absorber M10 whose temperature has risen by absorbing the heat radiation R1B dissipates the absorbed heat energy as heat radiation R2. Here, the heat radiation R2 from the heat radiation absorber M10 has no directivity and is radiated in all directions. For this reason, only a part of the heat radiation R2 from the heat radiation absorber M10, namely heat radiation R2A, travels toward the boarding space 10A side, and the remaining heat radiation R2B travels toward the body outer plate 11 side of the ceiling 10B or the inner layer direction of the ceiling base material 120.

[0028] Due to these effects, the vehicle ceiling interior material 100 suppresses the thermal radiation (thermal radiation R1A and thermal radiation R2A) from the sunlight R0 attempting to enter the passenger space 10A, and reduces the influence of the temperature rise of the passenger space 10A caused by this thermal radiation.

[0029] <Effect> According to the above-described vehicle ceiling interior material 100, the ceiling base material 120 included in the laminated structure 105 absorbs the thermal radiation R1B attempting to enter the passenger space 10A from the body outer panel 11 of the ceiling 10B by the thermal radiation absorber M10. Thereby, it is possible to provide a vehicle ceiling interior material 100 that can suppress the thermal radiation R1A reaching the passenger space 10A from the body outer panel 11 of the ceiling 10B without using a metal film that reflects thermal radiation.

[0030] Also, according to the vehicle ceiling interior material 100, in the ceiling base material 120, the temperature of the thermal radiation absorber M10 that has absorbed the thermal radiation R1B rises. Then, the thermal radiation absorber M10 dissipates the absorbed thermal energy as thermal radiation R2. And the thermal radiation R2 from the thermal radiation absorber M10 has no directivity and is radiated in all directions. For this reason, a part of the thermal radiation R2 from the thermal radiation absorber M10 goes toward the outside of the passenger space 10A. Thereby, the vehicle ceiling interior material 100 can suppress the thermal radiation R2A reaching the passenger space 10A.

[0031] Also, according to the vehicle ceiling interior material 100, any heat radiated from any part of the body outer panel 11 of the ceiling 10B passes through the ceiling base material 120 of the laminated structure 105 when attempting to reach the passenger space 10A. Thereby, the vehicle ceiling interior material 100 can suppress the thermal radiation R1A that passes through the ceiling base material 120 of the laminated structure 105 and reaches the passenger space 10A.

[0032] According to each configuration of the vehicle ceiling interior material 100, it is possible to provide a vehicle ceiling interior material 100 that suppresses the thermal radiation (thermal radiation R1A and thermal radiation R2A) reaching the passenger space 10A from the body outer panel 11 of the ceiling 10B without using a metal film that reflects infrared rays.

[0033] <Second Embodiment> Subsequently, the configuration of the vehicle ceiling interior material 600 according to the second embodiment of the present disclosure will be described with reference to FIG. 4. The vehicle ceiling interior material 600 according to the second embodiment is a modified form of the vehicle ceiling interior material 100 according to the first embodiment. Therefore, for the configurations common to those of the vehicle ceiling interior material 100 according to the first embodiment, the same reference numerals as those of the vehicle ceiling interior material 100 according to the first embodiment are used, with "500" added thereto, and the detailed description thereof will be omitted.

[0034] As shown in FIG. 3, the vehicle ceiling interior material 600 according to the second embodiment of the present disclosure covers the entire body outer panel 61 of the ceiling 60B of the vehicle 60 from the boarding space 60A side in the ceiling 60B of the vehicle. As shown in FIG. 4, the vehicle ceiling interior material 600 has a laminated structure 605 in which two layers, namely, a ceiling base material 620 and a skin material 610, are laminated in this order from the body outer panel 61 side toward the boarding space 60A side.

[0035] <Configuration of the Ceiling Base Material> In the ceiling base material 620, five layers, namely, a protective layer 621, a heat radiation absorption layer 622, an absorption layer adhesive layer 625, a heat insulation layer 623, and a skin material adhesive layer 624, are laminated in this order from the body outer panel 61 side of the ceiling 60B toward the boarding space 60A side. In the present embodiment, the layers constituting the ceiling base material 620 are adhered by an appropriately selected method.

[0036] <Configuration of the Protective Layer> The protective layer 621 is a nonwoven fabric layer formed by intertwining fibers mainly made of a thermoplastic resin such as polyester. This protective layer 621 is a buffer material sandwiched between the heat radiation absorption layer 622 and the body outer panel 61 of the ceiling 60B. In the present embodiment, the fiber density of the nonwoven fabric is uniform per unit area.

[0037] <Configuration of the Heat Radiation Absorption Layer> The heat radiation absorption layer 622 is a film-like layer made of a thermoplastic resin (e.g., polyamide) containing the heat radiation absorption material M10. As the heat radiation absorption material M10 incorporated in the heat radiation absorption layer 622, the same one as the heat radiation absorption material M10 used in the vehicle ceiling interior material 100 according to the first embodiment is used. That is, the heat radiation absorption material M10 absorbs the heat radiation R1B reaching the inside of the heat radiation absorption layer 622 and its temperature rises. Further, the thermoplastic resin constituting the heat radiation absorption layer 622 maintains a stable state against a temperature rise (e.g., a temperature rise up to 120°C) similar to the temperature rise due to the absorption of the heat radiation R1B by the heat radiation absorption material M10.

[0038] In the present embodiment, the heat radiation absorption material M10 is incorporated in the thermoplastic resin that is the raw material of the heat radiation absorption layer 622 in an amount of, for example, 1 to 10% by weight based on the weight. Further, the heat radiation absorption layer 622 is formed by inflation molding (a method of obtaining a tubular resin molded product by introducing cooling air into a cylinder while extruding a molten resin into a cylinder shape) of the thermoplastic resin containing the heat radiation absorption material M10. However, the heat radiation absorption layer 622 may be formed by, for example, cast molding (a method of obtaining a strip-shaped resin molded product by bringing a molten resin into contact with a cooling roll while extruding it in a strip shape).

[0039] The heat radiation absorption layer 622 has airtightness. Therefore, the propagation of sound between the body outer panel 61 of the ceiling 60B and the passenger space 60A is performed through the heat radiation absorption layer 622. Here, since the heat radiation absorption layer 622 has a higher density than air (not shown), the sound pressure is suppressed. That is, the heat radiation absorption layer 622 has a sound insulation function between the body outer panel 61 of the ceiling 60B and the passenger space 60A.

[0040] Further, due to its airtightness, the heat radiation absorption layer 622 suppresses the air (not shown) in the passenger space 60A from flowing to the body outer panel 61 of the ceiling 60B.

[0041] <Configuration of the heat insulation layer> The heat insulation layer 623 is configured by sandwiching a layer of plastic foam (for example, semi-rigid polyurethane with a heat resistance temperature of 120°C or higher) having a plurality of air bubbles M20 between layers of reinforcing fibers (not shown in the figure, for example, glass fibers) from both the front and back sides and integrating them. Here, the layer of reinforcing fibers provides the heat insulation layer 623 with the strength to maintain the shape of the ceiling interior material 600 for vehicles. This heat insulation layer 623 is provided at a position closer to the passenger space 60A side than the heat radiation absorption layer 622. Also, the heat conductivity of the heat insulation layer 623 is set to be smaller than both the heat conductivity of the heat radiation absorption layer 622 and the heat conductivity of the skin material 610.

[0042] <Configuration of the skin material adhesive layer> The skin material adhesive layer 624 is a film-like layer made of a thermoplastic resin (for example, polyamide), and is a bridging layer for adhering the skin material 610 to the ceiling base material 620. As a method for forming the skin material adhesive layer 624, a method similar to the method described above for forming the heat radiation absorption layer 622 can be adopted.

[0043] <Configuration of the absorption layer adhesive layer> The absorption layer adhesive layer 625 is a layer having exactly the same configuration as the skin material adhesive layer 624, and is a bridging layer for adhering the heat insulation layer 623 to the heat radiation absorption layer 622. The method for forming the absorption layer adhesive layer 625 is the same as the method for forming the skin material adhesive layer 624.

[0044] <Function of the ceiling interior material for vehicles> Next, the function of the ceiling interior material 600 for vehicles according to the above-described embodiment will be mainly described with reference to FIG. 4.

[0045] In the vehicle 60, when the body outer panel 61 of the ceiling 60B is heated by the sunlight R0, thermal radiation R1 from this body outer panel 61 toward the interior side of the vehicle 60 is generated. This thermal radiation R1 attempts to enter the passenger space 60A through the ceiling base material 620. However, a part of the thermal radiation R1, that is, the thermal radiation R1B, is absorbed by the thermal radiation absorber M10. Therefore, the thermal radiation R1A that passes through the ceiling base material 620 and reaches the passenger space 60A is only a part of the thermal radiation R1.

[0046] Also, the thermal radiation absorber M10 that has absorbed the thermal radiation R1B in the thermal radiation absorption layer 622 has its temperature increased. Then, the thermal radiation absorber M10 whose temperature has increased by absorbing the thermal radiation R1B dissipates the absorbed thermal energy as thermal radiation R2. Here, the thermal radiation R2 from the thermal radiation absorber M10 has no directivity and is radiated in all directions. For this reason, only a part of the thermal radiation R2 from the thermal radiation absorber M10, that is, the thermal radiation R2A, heads toward the passenger space 60A side, and the remaining thermal radiation R2B heads toward the body outer panel 61 side of the ceiling 60B or inward in the layer of the thermal radiation absorption layer 622.

[0047] Due to these actions, the vehicle ceiling interior material 600 suppresses the thermal radiation (thermal radiation R1A and thermal radiation R2A) derived from the sunlight R0 attempting to enter the passenger space 60A, and reduces the influence of the temperature rise of the passenger space 60A caused by this thermal radiation.

[0048] Also, in the thermal radiation absorption layer 622, the thermal radiation absorber M10 that has absorbed the thermal radiation R1B from the body outer panel 61 of the ceiling 60B has its temperature increased. The thermal radiation absorber M10 whose temperature has increased transmits the absorbed thermal energy to the surroundings by heat conduction T1. Since there is no directivity in this heat conduction T1, the heat attempts to move in all directions including the body outer panel 61 side and the passenger space 60A side. In contrast, the heat insulation layer 623 suppresses the heat of the heat conduction T1 from being transmitted to the passenger space 60A side due to its low thermal conductivity (refer to the state where the heat conduction T1 transmitted to the passenger space 60A side is shown as a dashed line within the heat insulation layer 623 in FIG. 4).

[0049] Also, the sound propagation between the body outer panel 61 of the ceiling 60B and the passenger space 60A is performed via air (not shown) and the heat radiation absorption layer 622. Then, the sound pressure is suppressed in the sound propagation between the body outer panel 61 of the ceiling 60B and the passenger space 60A.

[0050] Also, the heat radiation absorption layer 622 suppresses the air (not shown) in the passenger space 60A from flowing toward the body outer panel 61 side. Then, it is possible to suppress dust (not shown) in the passenger space 60A from flowing into the vehicle ceiling interior material 600 together with the air and adhering to the skin material 610 thereof.

[0051] <Effect> According to the above-described vehicle ceiling interior material 600, in the heat radiation absorption layer 622, the temperature of the heat radiation absorption material M10 that has absorbed the heat radiation R1B rises. Then, the heat radiation absorption material M10 transfers the absorbed heat energy to the surroundings by heat conduction T1. Here, the heat insulation layer 623 suppresses the heat of the heat radiation absorption layer 622 from being transferred to the passenger space 60A side by heat conduction T1 (see the heat conduction T1 drawn by the broken line in FIG. 4). Thereby, the vehicle ceiling interior material 600 can suppress the heat reaching the passenger space 60A.

[0052] According to each configuration of the vehicle ceiling interior material 600, it is possible to provide a vehicle ceiling interior material 600 that suppresses heat radiation (heat radiation R1A and heat radiation R2A) reaching the passenger space 60A from the body outer panel 61 of the ceiling 60B without using a metal film that reflects infrared rays.

[0053] <Other Embodiments> As described above, the embodiments for carrying out the present disclosure have been described by the above-described embodiments. However, it is obvious to those skilled in the art that various substitutions, repairs, and changes can be made without departing from the object of the present invention. That is, the embodiments for carrying out the object of the present invention can include all substitutions, repairs, and changes that do not depart from the spirit and object of the claims attached to this specification. For example, as embodiments for carrying out the present disclosure, the following various embodiments can be implemented.

[0054] In the present disclosure, the heat radiation absorber is not limited to carbon black, and an appropriately selected infrared absorber can be used. Examples of such infrared absorbers include, for example, tungsten oxide fine particles, composite tungsten oxide fine particles, dimonium-based compounds, aminium-based compounds, phthalocyanine-based compounds, organometallic complexes, cyanine-based compounds, azo compounds, polymethine-based compounds, quinone-based compounds, diphenylmethane-based compounds, triphenylmethane-based compounds, and the like. Further, in the present disclosure, a plurality of types of heat radiation absorbers having different absorption wavelengths may be used in combination. In this case, some of the heat radiation absorbers may be electromagnetic wave absorbers that well absorb electromagnetic waves in the far-infrared to submillimeter wave (radio wave) range.

[0055] In the present disclosure, the heat radiation absorber may have directivity in its heat radiation. Such a heat radiation absorber can be obtained, for example, by forming the heat radiation absorber into flat particle shapes. Even in this case, by blending the heat radiation absorber in an irregular orientation in the heat radiation absorption layer, the heat radiation as seen in the entire heat radiation absorption layer can be made non-directional.

[0056] In the vehicle ceiling interior material according to the second embodiment, the heat radiation absorbing material is not limited to being incorporated in a layer that exhibits airtightness between the protective layer and the heat insulating layer. That is, in the vehicle ceiling interior material, the heat radiation absorbing material may be incorporated in any of the protective layer, the absorption layer adhesive layer, the heat insulating layer, and the skin material adhesive layer. Here, when the protective layer is made of a material resin containing the heat radiation absorbing material, a method of producing fibers from the material resin containing the heat radiation absorbing material and using the nonwoven fabric produced from these fibers as the protective layer can be adopted. Further, when the absorption layer adhesive layer or the skin material adhesive layer is made of a material containing the heat radiation absorbing material, a method of producing the adhesive layer using a mixture of the heat radiation absorbing material and the material resin as a raw material can be adopted. Further, when the heat insulating layer is made of a material containing the heat radiation absorbing material, a method of mixing the heat radiation absorbing material in advance with the raw material of the heat insulating layer (for example, polyol or polyisocyanate when the heat insulating layer is made of urethane resin) can be adopted.

[0057] In the vehicle ceiling interior material according to the second embodiment, the specific materials of the heat radiation absorption layer and the adhesive layer are not limited to those described in the second embodiment. That is, the materials of the heat radiation absorption layer and the adhesive layer may be polypropylene or polyethylene terephthalate. Similarly, the specific material of the heat insulating layer is not limited to that described in the second embodiment. That is, the material of the heat insulating layer may be modified polyphenylene oxide.

Explanation of Reference Numerals

[0058] 10 Automobile 10A Occupied Space 10B Ceiling 11 Body Outer Panel 60 Automobile 60A Occupied Space 60B Ceiling 61 Body Outer Panel 100 Vehicle Ceiling Interior Material 105 Laminated Structure 110 Skin Material 120 Ceiling Base Material 600 Vehicle Ceiling Interior Material 605 Laminated structure 610 Surface material 620 Ceiling base material 621 Protective layer 622 Heat radiation absorption layer 623 Heat insulation layer 624 Surface material adhesive layer 625 Absorption layer adhesive layer M10 Heat radiation absorption material M20 Bubbles R0 Solar light R1 Heat radiation R1A Heat radiation R1B Heat radiation R2 Heat radiation R2A Heat radiation R2B Heat radiation T1 Heat conduction

Claims

1. An interior ceiling material for a vehicle that covers the outer body panel of the ceiling on the vehicle ceiling from the boarding space side, comprising a laminated structure in which a plurality of layers are laminated from the outer body panel side toward the boarding space side, wherein the laminated structure includes a heat radiation absorption layer that is a layer containing a heat radiation absorption material that absorbs heat radiation reaching the inside of the layer, an interior ceiling material for a vehicle.

2. The interior ceiling material for a vehicle according to Claim 1, wherein the heat radiation from the heat radiation absorption material is non-directional, an interior ceiling material for a vehicle.

3. The interior ceiling material for a vehicle according to Claim 1 or Claim 2, wherein the heat radiation absorption layer is provided so as to cover the entire outer body panel from the boarding space side, an interior ceiling material for a vehicle.

4. The interior ceiling material for a vehicle according to Claim 1 or Claim 2, wherein the laminated structure includes a heat insulation layer that is a layer having a thermal conductivity smaller than that of the heat radiation absorption layer, and the heat insulation layer is provided at a position closer to the boarding space side than the heat radiation absorption layer, an interior ceiling material for a vehicle.

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