JP2018158627A - Nonwoven fabric and vehicular interior material using the nonwoven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular interior material suitable for mass productivity, in a vehicular interior material that constitutes a metal vapor deposition film.SOLUTION: A nonwoven fabric is constituted of a fiber body 41 of thermoplastic synthetic resin containing a crystal structure obtained by calcining a chromium oxide and an iron oxide as an inorganic pigment 42 having an infrared reflection function and includes an infrared reflection function of providing a part that receives sunlight in a vehicle body with heat shielding effect by further reflecting an infra-red ray. There is also provided a vehicular interior material using the same.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a nonwoven fabric and a vehicle interior material using the nonwoven fabric.

  Conventionally, a specification using a dark non-woven fabric such as black has been applied to the back surface of a board-type sunshade in a vehicle such as an automobile in consideration of the appearance through a slide glass. For such a nonwoven fabric, a fibrous body containing carbon black or the like has been used to make it dark. Since such carbon black has the property of absorbing the entire wavelength range of sunlight, it absorbs infrared rays serving as a heat source. For this reason, the surface temperature of the back surface of the sunshade increases and the amount of heat stored in the entire sunshade tends to increase, and this stored heat moves to the indoor side and increases the indoor temperature. For this reason, it is desired to require heat shielding properties on the back surface of the sunshade. Here, as a fabric having thermal insulation, a fabric-like thermal insulation film material in which both sides of a fiber fabric are impregnated with a waterproof flame retardant resin is known (for example, Patent Document 1).

JP2015-83725A

  However, although the technology of Patent Document 1 is a fabric impregnated and coated with a waterproof flame retardant resin, a heat shielding effect can be expected, but there is a risk of increasing the weight by the amount of the resin layer. Have concerns. In addition, since the fabric is impregnated with a waterproof flame retardant resin, there is a possibility that certain limitations are imposed on the formability when forming into a three-dimensional shape along the backside shape of the sunshade.

  The present invention was devised in view of the above points, and the problem to be solved by the present invention is a nonwoven fabric having a heat shielding effect without increasing the weight or inhibiting the moldability, and the nonwoven fabric. It is providing the interior material for vehicles using.

  The nonwoven fabric which solves the said subject is comprised with the fiber body of the thermoplastic synthetic resin in which the inorganic pigment which has an infrared reflective function contained.

  According to this structure, it can be set as the nonwoven fabric which can reflect the infrared rays used as a heat source by containing the inorganic pigment which has an infrared reflective function. Thereby, it can be set as the nonwoven fabric which has a heat-shielding effect. Moreover, although the said nonwoven fabric is a structure containing an inorganic pigment, there is little influence in weight increase and the obstruction | occlusion of a moldability.

  About the said nonwoven fabric, it is preferable that the said inorganic pigment is a crystal structure which baked chromium oxide and iron oxide.

  According to this structure, a nonwoven fabric is comprised as a fiber body in which the crystal structure which baked chromium oxide and iron oxide was contained inside. Therefore, it may be possible to produce the fiber without using a special process.

  For the non-woven fabric, the inorganic pigment is replaced with a crystal structure obtained by firing chromium oxide and iron oxide, a crystal structure of an oxide compound composed of manganese and bismuth, a crystal structure of an oxide compound composed of manganese and strontium, or an oxide composed of manganese and yttrium. It may be composed of any one of the crystal structures of the compound.

  According to this configuration, instead of the crystal structure obtained by firing chromium oxide and iron oxide, the crystal structure of the oxide compound of manganese and bismuth, the crystal structure of the oxide compound of manganese and strontium, or the crystal of the oxide compound of manganese and yttrium By containing an inorganic pigment having any one of the structures, a nonwoven fabric capable of reflecting infrared rays serving as a heat source can be obtained.

  About the said nonwoven fabric, the nonwoven fabric in any one of 1st invention to 3rd invention is comprised as an interior material of a vehicle main body, The said nonwoven fabric is the opposite side to the surface by the side of the indoor surface of a vehicle body among the said interior materials. It is preferable that the vehicle interior material be disposed on the surface of the vehicle.

  According to this structure, it can be set as the vehicle interior material which reflects infrared rays and brings about the heat-shielding effect.

  About the said interior material for vehicles, it is preferable to be comprised in the site | part which receives sunlight in the said vehicle main body.

  According to this structure, it can be set as the vehicle interior material which reflects the infrared rays further and provides a heat-shielding effect by being configured in a portion of the vehicle body that is exposed to sunlight.

  This invention can provide the nonwoven fabric provided with the infrared reflective function, and the vehicle interior material using this by taking the means of each of the above inventions.

It is a perspective view showing the interior material for vehicles concerning this embodiment. It is sectional drawing which showed the structure of the sunshade. It is the schematic diagram which showed the structure of the fiber. It is a schematic diagram of the test of heat shielding performance evaluation as Example 1 of the interior material for vehicles. It is the graph showing the surface temperature of the backing material in the test of thermal insulation performance evaluation. It is the graph showing the surface temperature of the skin material in the test of thermal insulation performance evaluation. It is a schematic diagram for the heat shielding effect confirmation test as Example 2 of the vehicle interior material. It is the schematic diagram which showed the measurement point of the heat insulation effect confirmation test as Example 2 of the interior material for vehicles. It is a graph showing the surface temperature on the backing side in the heat shielding effect confirmation test. It is the graph showing the surface temperature on the skin side in the test of the heat shielding effect confirmation test.

  Embodiments for carrying out the present invention will be described below with reference to FIGS. In the embodiment of the present invention, a sliding movement along a window portion formed on a roof panel of a vehicle as an interior material for a vehicle causes a light incident state where light is incident and a light shielding state where light is blocked. A sunshade configured to be switchable will be described as an example.

  As shown in FIG. 1, the vehicle includes a roof panel 12 made of a steel plate as a structure of the roof. The roof panel 12 is formed with a panel opening 14 partly penetrating in the thickness direction. The panel opening 14 is a sunroof that has a window 16 formed by fitting transparent glass or the like. In addition, the window part 16 is not restricted to the aspect in which glass etc. were inserted, There can also be an aspect which can be opened and closed. A vehicle ceiling material 18 is attached to the inside of the roof panel 12.

  The vehicle ceiling member 18 is assembled so as to face the vehicle interior side in parallel with the roof panel 12. The vehicle ceiling material 18 has an opening 19 penetrating in the thickness direction corresponding to the window portion. The sunshade 20 is configured in a substantially rectangular plate shape having a size covering the opening 19, and is slidably disposed by a guide mechanism 17 along the opening 19.

  As shown in FIG. 2, in the sunshade 20, fiber reinforcing materials 26 are superimposed on both surfaces of a core material 22 made of a urethane resin foam via an adhesive resin 24. A skin material 30 is superimposed on the surface of one fiber reinforcing material 26 via an adhesive film 28. Further, a backing material 40 is superimposed on the surface of the other fiber reinforcing material 26 via an adhesive film 28. The laminated body is fused and formed in a three-dimensional shape by being sandwiched by a press die and heated and pressed. Further, the adhesive film 28 is provided with a ventilation blocking layer that blocks ventilation.

  The core member 22 is provided to maintain the shape and ensure rigidity, and may adopt an aspect having indoor sound absorption and heat insulation. The core material 22 can be applied in various ways such as fiber, corrugated cardboard, urethane, and foamed olefin. In this embodiment, a semi-rigid urethane foam made of urethane resin foam is selected for the core material 22.

  Various adhesive resins 24 can be selected. Here, it is preferable that a urethane resin is selected from the viewpoint that it is easily compatible with the semi-rigid foamed urethane layer. The urethane resin is configured on both sides of the semi-rigid foamed urethane layer. Here, the urethane resin is either one that is applied to both surfaces of the semi-rigid foamed urethane layer by a roll coater, spray, or the like, and one that is applied to the semi-rigid foamed urethane layer in a state where the fiber reinforcing material described later is impregnated with the urethane resin. There may be.

  The fiber reinforcing material 26 is made of inorganic fibers such as chopped strands, organic fibers such as jute (hema), kenaf (marine), ramie, hemp (hemp), natural fibers such as sisal hemp, bamboo, etc. It is made into a sheet shape or a mat shape by selecting and bindering. In addition to the binder, it may be a sheet or a mat formed by needle processing. Here, a glass fiber mat is selected as the fiber reinforcing material 26. As the glass fiber mat, a glass fiber mat formed into a sheet shape by appropriately hardening a chopped strand obtained by cutting glass fibers that are inorganic fibers with a binder is selected. The glass fibers used here are not only those obtained by consolidating the chopped strands as described above, but also those obtained by consolidating glass fibers with binders without cutting them (continuous mats), glass fiber nonwoven fabrics, glass fibers Paper or glass fiber woven fabric may be used.

  The adhesive film 28 is configured to heat-seal the skin material 30 or the backing material 40 to the fiber reinforcing material 26. The adhesive film 28 is composed of a synthetic resin film having a melting point that is melted to a heating temperature when being heated and pressurized by being sandwiched by a press die. The synthetic resin film of the adhesive layer is composed of an olefin resin. This adhesive layer is composed of two sheets, and is composed of a multilayer film in which a ventilation blocking layer is sandwiched between the adhesive layers. This ventilation blocking layer is made of a synthetic resin film having a melting point that does not melt even at the heating temperature when it is sandwiched by a press die and subjected to heating and pressing. For example, it is a layer which blocks | blocks ventilation | gas_flowing which consists of a polyamide-type synthetic resin, a polyester resin, etc. as a synthetic resin film of a ventilation block. The adhesive film 28 for thermally fusing the skin material 30 to the fiber reinforcement 26 is not limited to a multilayer film, and may be a single layer film. That is, the single-layer film as the adhesive film 28 provided on the skin material 30 side is an olefin resin as a synthetic resin film having a melting point that is melted to a heating temperature when sandwiched by a press die and subjected to heating and pressing. It may be comprised.

  As the skin material 30, a material having a known configuration can be selected as appropriate. The skin material 30 constitutes a design surface on the vehicle interior side with respect to the sunshade 20. The skin material 30 may be composed of only a synthetic resin non-woven fabric, or may be a three-layer configuration of knit, urethane, and non-woven fabric. Further, it may be a textured texture pattern such as satin or leather, or a synthetic resin sheet subjected to leather processing. A woven fabric may also be used.

  Since the backing 40 is disposed to face the window 16 in the panel opening 14, the backing 40 is a part that is exposed to direct sunlight through the window 16. Here, the backing 40 is a non-woven fabric composed of a fiber body 41 having an infrared reflecting function. The backing 40 is a non-woven fabric having a surface shape by a fiber body 41 of a thermoplastic synthetic resin. The non-woven fabric can be molded lightly, has a property of being flexible and easily stretched, is easily adapted to the molding surface of the sunshade, and has good moldability. Moreover, it is preferable also from viewpoints of material cost, manufacturing cost, etc. As the nonwoven fabric, any of a dry method represented by a cross layer, an air lay, etc., or a wet method represented by a papermaking method can be selected. Examples of the nonwoven fabric material include polypropylene, polyamide, polyester, and polyacrylonitrile fibers of various thermoplastic synthetic resins.

  As shown in FIG. 3, the fibrous body 41 is made of a thermoplastic synthetic resin containing a crystal structure obtained by firing chromium oxide and iron oxide as an inorganic pigment 42 having an infrared reflecting function. Since this crystal structure has a high average absorptance of visible light 50 in the light wavelength region of 400 nm to 780 nm, it becomes a dark nonwoven fabric. In addition, this crystal structure has a low average absorptance in a wavelength region of 780 nm to 2000 nm having a wavelength longer than that of visible light. That is, since the reflectance of infrared rays 60 is high, it is difficult to store heat.

  The solar reflectance of the inorganic pigment in the crystal structure obtained by firing chromium oxide and iron oxide will be described. Such solar reflectance is based on JIS R 3106. Here, the solar reflectance of the inorganic pigment in the crystal structure in which chromium oxide and iron oxide are fired has an average reflectance of 22% in the light wavelength region of 400 nm to 2100 nm, and the average reflectance in the light wavelength region of 800 nm to 2100 nm. The rate is 43%.

  Here, the fiber body 41 of the thermoplastic synthetic resin which becomes the raw material of the nonwoven fabric of the backing 40 is formed by a melt spinning apparatus. The fiber body 41 is obtained by inserting a thermoplastic synthetic resin raw material chip into a melt extruder in a melt spinning apparatus, and extruding the molten thermoplastic synthetic resin into a fiber shape from a nozzle (die) having many fine holes. It is formed by stretching the film in the length direction and drawing it. Here, when the raw material chip of the thermoplastic synthetic resin is put into the melt extruder in the melt spinning apparatus, the inorganic pigment 42 (crystal structure obtained by firing chromium oxide and iron oxide) is also put together. The inorganic pigment 42 is kneaded when the raw material chips are melted by the melt extruder.

  The inorganic pigment 42 showed a crystal structure obtained by firing chromium oxide and iron oxide. Instead of the crystal structure obtained by firing chromium oxide and iron oxide, any one of the crystal structure of an oxide compound of manganese and bismuth, the crystal structure of an oxide compound of manganese and strontium, or the crystal structure of an oxide compound of manganese and yttrium Even if it is constituted, the same effect as the crystal structure obtained by firing the chromium oxide and iron oxide can be obtained.

  The solar reflectance of the inorganic pigment in the crystal structure of the oxide compound composed of manganese and bismuth will be described. Such solar reflectance is based on JIS R 3106. Here, the solar reflectance of the inorganic pigment in the crystal structure of the oxide compound of manganese and bismuth is 19% in the light wavelength region of 400 nm to 2100 nm, and the average reflectance is in the light wavelength region of 800 nm to 2100 nm. 38%.

  The solar reflectance of the inorganic pigment in the crystal structure of the oxide compound of manganese and strontium will be described. Such solar reflectance is based on JIS R 3106. Here, the solar reflectance of the inorganic pigment in the crystal structure of the oxide compound of manganese and strontium is 32% in the light wavelength region of 400 nm to 2100 nm, and the average reflectance is in the light wavelength region of 800 nm to 2100 nm. 62%.

  The solar reflectance of the inorganic pigment in the crystal structure of the oxide compound composed of manganese and yttrium will be described. Such solar reflectance is based on JIS R 3106. Here, the solar reflectance of the inorganic pigment in the crystal structure of the oxide compound of manganese and yttrium is 22% in the light wavelength region of 400 nm to 2100 nm, and the average reflectance is in the light wavelength region of 800 nm to 2100 nm. 45%.

  Moreover, it is preferable that the particle | grains in the above-mentioned crystal structure are 0.5 micrometer-5 micrometers. If the particle size is less than 0.5 μm, the effect of the infrared reflection function becomes poor. On the other hand, if the particles are larger than 5 μm, the fiber body 41 becomes thick.

  If the content of the inorganic pigment 42 is small, the effect of reflecting infrared rays is poor, and if the content is too high, the fiber strength may be lowered. In view of these, the content of the inorganic pigment 42 is preferably 0.5 to 5% by weight. More preferably, it is 2.0 to 3.0% by weight.

  The thickness of the fiber body 41 in the nonwoven fabric is preferably 2 to 6 denier. If the thickness of the fiber body 41 is thinner than 2 denier, the content rate is lowered due to the size of the crystal structure of the pigment, and the infrared reflection effect is reduced. Further, there is a concern that the color of the fiber body 41 tends to be brighter and it is difficult to reproduce a dark design. If the thickness of the fiber body 41 is larger than 6 denier, when the weight of the square meter unit is reduced, sheerness is likely to occur, which is not preferable in appearance and may cause the use to be narrowed. More preferably, it is 3-6 denier.

The present invention will be described with reference to examples.
<Example 1>
In Example 1, a heat shielding performance test was performed under the following conditions. The thermal insulation performance test is conducted on the assumption that the vehicle is exposed to the hot weather in summer. Specifically, as shown in FIG. 4, a test plate 201 and a comparison plate 202 made of a rectangular flat plate are prepared, the backing 40 side is directed upward, a halogen lamp 62 is placed thereon, and irradiation is performed. With the pair 66, the surface temperature on the backing 40 side and the surface temperature on the skin material 30 side were measured. The test plate 201 simulates a sunshade as an example to which the present embodiment is applied, and the comparison plate 202 imitates a sunshade having a conventional configuration.

The detailed configuration of the test plate 201 is as follows.
(1) Core material 22
A semi-rigid urethane foam made of urethane resin foam having a density of 0.033 and a thickness of 5.5 mm was used.
(2) Adhesive resin 24
Among thermosetting resins, 100 g / m ² of isocyanate resin was used.
(3) Fiber reinforcement 26
A glass fiber mat having a basis weight of 300 g / m ² was used.
(4) Adhesive film 28
Two adhesive layers made of an olefin resin are formed, and a three-layer film in which a ventilation blocking layer is sandwiched between the adhesive layers.
(5) Skin material 30
A polyester nonwoven fabric having a basis weight of 180 g / m ² was used.
(6) Backing 40
As the inorganic pigment 42, a non-woven fabric 140 g / m ² containing 2% by weight of a crystal structure obtained by firing chromium oxide and iron oxide and comprising a fiber body 41 having a thickness of 3 denier was used.

  The test plate 201 was irradiated with a halogen lamp 62 of 100 V and 500 W for 120 minutes in order to imitate the environment under hot weather with the backing 40 side facing upward.

  The surface temperatures of the backing 40 and the skin 30 were both measured with a thermocouple 64 (manufactured by KEYENCE, product number NR-1000).

On the other hand, the comparison board 202 was made into the backing material by the polyester nonwoven fabric similar to the skin material 30 instead of the backing material 40 among the structures of the said test board 201, and the fabric weight 140g / m < ² > was used. This polyester nonwoven fabric contains 1.0% by weight of carbon black. The surface temperature of the skin material and the backing material was measured in the same manner as the test plate 201 with the backing side of the polyester nonwoven fabric facing upward.

  As shown in FIG. 5, the temperature on the backing side increased for both the test plate 201 and the comparison plate 202 until 20 minutes passed, and then stabilized at a constant temperature. The test plate 201 was stable at about 90 degrees. On the other hand, the comparison plate 202 was stable at about 110 degrees. As a result, the temperature on the backing side was stabilized by about 20 degrees lower for the test plate 201. This is thought to be about 20 degrees lower due to the reflection of the infrared ray 60 by the inorganic pigment 42.

  As shown in FIG. 6, the temperature on the skin material side increased for both the test plate 201 and the comparison plate 202 until 30 minutes passed, and then stabilized at a constant temperature. The test plate 201 was stable at about 88 degrees. On the other hand, the comparison plate 202 was stable at about 105 degrees. As a result, the temperature on the skin material side was stabilized by about 17 degrees lower for the test plate 201. This is because the inorganic pigment 42 reflects the infrared ray 60 and thus it is difficult to store heat, which is considered to have decreased by about 17 degrees.

<Example 2>
In Example 2, a heat shielding effect confirmation test was performed under the following conditions. In the heat shielding effect confirmation test, the sunshade in the vehicle is exposed to the hot weather in the summer, and the sunshade backing material (similar to the comparison plate 202) used conventionally and the backing material 240 in this embodiment are used. In this test, the effect is confirmed by measuring the surface temperature, the ambient temperature, etc. of the (test plate 203). In the heat shielding effect confirmation test, the test plate 203 and the comparison plate 204 were used. The test plate 203 includes a backing material 240 instead of the backing material 40. The backing 240 was made of 140 g / m ² of a nonwoven fabric comprising 4 wt% of an oxide compound crystal structure composed of manganese and bismuth and made of a fiber body 41 having a thickness of 3 denier as the inorganic pigment 42.

  Specifically, as shown in FIGS. 7 and 8, first, a test plate 203 and a comparison plate 204 made of a rectangular flat plate imitating a sunshade are prepared. The test plate 203 is placed in the upper opening of the box 70 so that the backing 240 (the conventional backing in the case of the comparison plate 204) is directed upward. A glass plate 72 was disposed thereon with a frame member 71 having a height of 30 mm, and irradiated with a halogen lamp 62 for 60 minutes from a position spaced 230 mm above. Using the thermocouple 66, the temperature of the front and back surfaces of the glass plate 72, the ambient temperature between the glass plate 72 and the backing 240, and the surface temperature of the backing 240 (the conventional backing in the case of the test plate 203) side The surface temperature on the skin material 30 side and the atmospheric temperature in the box 70 were measured at six locations. The test plate 201 simulates a sunshade as an example to which the present embodiment is applied, and the comparison plate 202 imitates a sunshade having a conventional configuration. This assumes that in a vehicle, the sunshade and the glass plate are installed with an air layer of about 30 mm apart.

The detailed configuration of the test plate 203 is as follows.
(1) Core material 22
A semi-rigid urethane foam made of urethane resin foam having a density of 0.033 and a thickness of 7.0 mm was used.
(2) Adhesive resin 24
Among thermosetting resins, 100 g / m ² of isocyanate resin was used.
(3) Fiber reinforcement 26
A glass fiber mat having a basis weight of 300 g / m ² was used.
(4) Skin material 30
A skin material composed of three layers of spunlace nonwoven fabric, urethane foam, and knit was used.
(5) Adhesive film between the skin material 30 and the fiber reinforcing material 26 It is comprised by the one-layer contact bonding layer comprised from the olefin resin.
(6) Backing 240
As the inorganic pigment 42, a non-woven fabric 140 g / m ² containing 4% by weight of a crystal structure of an oxide compound of manganese and bismuth and including a fiber body 41 having a thickness of 3 denier was used.
(7) Adhesive film 28 between backing 240 and fiber reinforcement 26
Two adhesive layers made of an olefin resin are formed, and a three-layer film in which a ventilation blocking layer is sandwiched between the adhesive layers.

  The test plate 203 is placed on the upper opening of the box 70 with the backing 240 side facing up. A glass plate 72 is disposed thereon with a 30 mm frame member 71 therebetween. In addition, a halogen lamp 62 of 100 V and 500 W was further arranged at a position spaced 230 mm above, and irradiated for 60 minutes to simulate the environment under the hot weather in summer.

The following 6 locations were measured with a thermocouple 64 (manufactured by KEYENCE: product number NR-1000).
A: Surface of the glass plate 72 (surface on the irradiation side of the halogen lamp 62)
B: Back surface of glass plate 72 (surface opposite to the irradiation side of halogen lamp 62)
C: Atmospheric temperature between the glass plate 72 and the backing material 240 D: Surface temperature on the backing material 240 side E: Surface temperature on the skin material 30 side F: Atmospheric temperature in the box 70

On the other hand, the comparison board 204 was replaced with the backing material 240 in the configuration of the test plate 203, and a backing material made of a polyester nonwoven fabric was used, and a basis weight of 140 g / m ² was used. This polyester nonwoven fabric contains 1.0% by weight of carbon black. The temperature of six places similar to the test plate 203 was measured with the backing side of the polyester nonwoven fabric facing upward.

Each temperature by the heat insulation effect confirmation test in Example 2 was as follows.

  As can be seen from Table 1, the test plate 203 was below the temperature of the comparison plate 204 at any of the six measurement points. In particular, the temperature difference between the test plate 203 and the comparison plate 204 was large in the atmosphere temperature between the C glass plate 72 and the backing 240 and the surface temperature on the D backing 240 side. This is considered due to the fact that the backing 240 reflects infrared rays serving as a heat source rather than the backing of the conventional configuration. As a result, in the atmosphere temperature inside the box simulating the passenger compartment, the comparison plate 204 was 51.0 degrees, whereas the test plate 203 was 43.3 degrees, and the temperature difference was 7.7 degrees.

  FIG. 9 shows the change in the surface temperature of the sunshade backing material. As shown in FIG. 9, the surface temperature of the sunshade backing increased for both the test plate 203 and the comparison plate 204 until 20 minutes passed, and then stabilized at a constant temperature. The test plate 203 was stable at a maximum temperature of 102.6 degrees. On the other hand, the comparison plate 204 was stable at the maximum temperature 129.0. As a result, the surface temperature of the sunshade backing material was stabilized to be lower by about 26.4 degrees for the test plate 203. This is thought to be about 26.4 degrees lower due to the reflection of the infrared ray 60 by the inorganic pigment 42.

  FIG. 10 shows the transition of the ambient temperature in the box 70. As shown in FIG. 10, the ambient temperature in the box 70 increased for both the test plate 203 and the comparison plate 204 until 30 minutes passed, and then stabilized at a constant temperature. The test plate 203 was stable at a maximum temperature of 43.3 degrees. On the other hand, the comparison plate 204 was stable at the maximum temperature of 51.0 degrees. As a result, the ambient temperature in the box 70 was stabilized lower by 7.7 degrees for the test plate 203. This is because the inorganic pigment 42 reflects the infrared ray 60 and thus it is difficult to store heat, which is considered to have decreased by 7.7 degrees.

  Compared to the average reflectance of the crystal structure of the oxide compound of manganese and bismuth used for the test plate 203, the average reflectivity of the crystal structure obtained by firing the chromium oxide and iron oxide used for the test plate 201 is more. high. Therefore, it can be seen that the test plate 201 has a configuration in which infrared rays are more reflected and heat is not easily stored.

  Further, since the average reflectance of the crystal structure of the oxide compound of manganese and strontium and the crystal structure of the oxide compound of manganese and yttrium are higher than the average reflectance of the crystal structure of the oxide compound of manganese and bismuth of the test plate 203, manganese And a bismuth oxide compound having a crystal structure inorganic pigment can reflect infrared rays and be less likely to store heat.

  From the above, it has been confirmed that the use of the backing 40 made of a nonwoven fabric composed of the fibrous body 41 having an infrared reflecting function has an effect of suppressing temperature movement toward the vehicle interior side.

  Thus, the sunshade 20 of the embodiment (vehicle interior material) has the following effects. The non-woven fabric of the backing 40 can be a non-woven fabric capable of reflecting the infrared rays 60 serving as a heat source by containing the inorganic pigment 42 having an infrared reflecting function. Thereby, it can be set as the nonwoven fabric of the backing 40 which has a heat-shielding effect. Moreover, the nonwoven fabric of the backing 40 is configured as a fiber body 41 containing a crystal structure obtained by firing chromium oxide and iron oxide. Therefore, it may be possible to produce the fiber without using a special process. In addition, the sunshade 20 that reflects the infrared rays 60 to provide a heat shielding effect can be used as (vehicle interior material). Further, the sunshade 20 that reflects the infrared ray 60 and provides a heat shielding effect by further configuring the backing 40 in a portion that is exposed to direct sunlight in the vehicle can be (vehicle interior material).

  As mentioned above, although embodiment of this invention was described, the nonwoven fabric of this invention and the vehicle interior material using the same are not limited to this embodiment, It can implement with other various forms. For example, the vehicle is not limited to a vehicle, and can be applied to various vehicles such as a ship and an aircraft.

Moreover, although the nonwoven fabric in this invention illustrated what was comprised by the interior material for vehicles, it is not restricted to this, It can apply variously to what wants to exhibit an infrared reflective function. For example, in the present embodiment, the sunshade in the vehicle has been described as an example of the vehicle interior material. However, the present invention is not limited to the sunshade and can be applied as various interior materials such as a vehicle ceiling material and a trim material. In particular, what constitutes the nonwoven fabric in the present embodiment can be applied to various parts that are exposed to direct sunlight.

12 roof panel 14 panel opening 16 window 18 vehicle ceiling material 20 sunshade (vehicle interior material)
22 Core material 24 Adhesive resin 26 Fiber reinforcing material 28 Adhesive film 30 Skin material 40 Backing material 41 Fiber body 42 Inorganic pigment 50 Visible light 60 Infrared

Claims (5)

  A nonwoven fabric composed of a fibrous body of a thermoplastic synthetic resin containing an inorganic pigment having an infrared reflecting function. The nonwoven fabric according to claim 1,
The inorganic pigment is a nonwoven fabric having a crystal structure obtained by firing chromium oxide and iron oxide. The nonwoven fabric according to claim 1,
The inorganic pigment is replaced with a crystal structure obtained by baking chromium oxide and iron oxide, a crystal structure of an oxide compound of manganese and bismuth, a crystal structure of an oxide compound of manganese and strontium, or a crystal structure of an oxide compound of manganese and yttrium A nonwoven fabric composed of any one of the above.   The non-woven fabric according to any one of claims 1 to 3 is configured as an interior material for a vehicle body, and the non-woven fabric is disposed on a surface of the interior material opposite to the interior surface side surface of the vehicle body. Interior materials for vehicles. The vehicle interior material according to claim 4,
An interior material for a vehicle configured in a portion exposed to sunlight in the vehicle main body.

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