Optical decorative fabric and vehicle interior material

Abstract

To provide a fabric for optical decoration suitable for performing decoration by light.SOLUTION: The decorative sheet is made of a fabric containing ultrafine fibers 40A having single fiber diameters of 1 μm or more and 6 μm or less, and performs decoration by transmitting light from a light transmission part 72, wherein the fabric has an ultrafine fiber layer in which a plurality of ultrafine fibers 40A are arranged in a planarly dispersed state and which has a light reflectance of 85% or less, and the light transmission part 72 is formed by a plurality of through holes 70.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a fabric for light decoration and to an interior material for a vehicle using the fabric for light decoration. [Background technology]

[0002] Patent Document 1 below discloses a technology in which light from a display device or the like is irradiated from the back side of a decorative member such as an automobile interior material, thereby displaying a pattern or the like on the front side (design surface) of the decorative member. In Patent Document 1 below, the decorative member comprises a main body member which is a transparent plate-like member that transmits light, such as polycarbonate resin or ABS resin, and a decorative sheet laminated on the top surface of the main body member. The decorative sheet is in the form of a film, and is formed by laminating a light-transmitting layer made of polymethyl methacrylate, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polystyrene, cyclic polyolefin, or the like, and a light-shielding layer containing a black pigment such as carbon black or titanium black. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-75371 Summary of the Invention [Problem to be solved by the invention]

[0004] On the other hand, for example, when the decorative member as described above is something that people touch, it may be desirable to attach fabric to the surface to improve the tactile feel. Furthermore, when it is desired to display a pattern or the like using light on the front side of the fabric, it is necessary to overlay a light-blocking member separately from the fabric on the back side of the fabric in areas where the fabric does not transmit light. Therefore, when decorating the surface of the fabric using light, providing a light-blocking member increases costs and increases the amount of work required during the manufacturing process.

[0005] The present invention has been made in view of the above circumstances, and aims to provide a fabric for light decoration suitable for light decoration, and also to provide a vehicle interior material suitable for light decoration in the interior of a vehicle. [Means for solving the problem]

[0006] In order to solve the above problems, the light-decorating fabric disclosed in the present application has the following structure. (1) A fabric for light decoration, It is made of a fabric containing ultrafine fibers with a single fiber diameter of 1 μm or more and 6 μm or less, and is decorated by transmitting light through the light-transmitting portion, The fabric has an ultrafine fiber layer in which a plurality of the ultrafine fibers are arranged in a planar dispersed state and has a light reflectance of 85% or more, The light-transmitting portion is formed by a plurality of through holes.

[0007] The ultrafine fibers that constitute the fabric for optical decoration disclosed herein have a relatively small single fiber diameter of 1 μm or more and 6 μm or less. Fabrics constructed using fibers with a single fiber diameter within this range have excellent light reflectivity. The ultrafine fiber layer in the fabric for optical decoration disclosed herein has multiple ultrafine fibers arranged in a planar, dispersed state, and has a light reflectivity of 85% or more in the visible light range. The fabric used in the fabric for optical decoration disclosed herein transmits almost no light irradiated from the back side, allowing a large amount of light to exit from the light-transmitting portion. Therefore, for example, by providing multiple through-holes along the pattern to be displayed on the front side and irradiating light from the back side, the pattern can be displayed on the front side with light.

[0008] Furthermore, if the lighting device arranged on the back side emits light bearing a pattern, the light-decorating fabric may be configured with multiple through-holes in an area that includes the pattern but is wider than the pattern, or throughout the entire fabric. In this case, if a fabric that does not contain ultrafine fibers is used, the pattern displayed on the front side will be blurred, but the light-decorating fabric disclosed in this application makes it possible to display the pattern clearly. Note that the multiple through-holes in the light-transmitting portion are preferably of a size that is not visible to the human eye (for example, 100 μm or less). By using through-holes of such a size, the light-decorating fabric can be visually perceived as if it were transmitting light.

[0009] The cross-sectional shape of the ultrafine fibers in the light-decorating fabric disclosed herein is not limited to a circular cross-section, but may also be irregular, such as a polygonal cross-section. In the case of fibers with irregular cross-sectional shapes, the diameter of the circumscribed circle can be considered the single fiber diameter. Furthermore, the material of the ultrafine fibers is not particularly limited, but synthetic fibers can be used to obtain fibers with a cross-sectional shape that has excellent light reflectivity. The synthetic fibers are not particularly limited, but various synthetic fibers can be used, such as polyester fibers such as polyethylene terephthalate (PET) fibers, polybutylene terephthalate fibers, polytrimethylene terephthalate fibers, and polylactic acid fibers; polyamide fibers such as polyamide 6 fibers and polyamide 66 fibers; polyacrylic fibers; and polyolefin fibers such as polypropylene fibers. Among these synthetic fibers, polyester fibers, especially PET fibers, are preferred from the viewpoints of versatility and cost. Furthermore, the ultrafine fiber layer may be an assembly of the above-mentioned ultrafine fibers, and various types of fabrics, such as woven fabrics, knitted fabrics, and nonwoven fabrics, can be used.

[0010] Incidentally, the ultrafine fiber layer has excellent reflectivity not only for visible light but also for the near-infrared region, so the light-decorating fabric disclosed in the present application also has excellent heat-shielding performance and is suitable for use in locations exposed to sunlight.

[0011] The light-decorating fabric having the above-described configuration can be configured in various ways as shown below.

[0012] (2) The fabric for light decoration according to (1), wherein the ultrafine fiber layer has an ultrafine fiber occupancy rate, which is the ratio of the area occupied by the ultrafine fibers in a cross section perpendicular to the direction in which the ultrafine fibers extend, of 9.9% or more.

[0013] In the fabric for optical decoration with this configuration, the ultrafine fiber layer has an ultrafine fiber occupancy rate of 9.9% or more, resulting in a light reflectance of 85% or more in the visible light range. Although an ultrafine fiber occupancy rate of 9.9% is a relatively small value, there are relatively many gaps around the ultrafine fibers with a single fiber diameter of 1 μm or more and 6 μm or less, and the ultrafine fiber layer is configured with a large number of ultrafine fibers densely arranged. The fabric used in the fabric for optical decoration disclosed in the present application hardly transmits light irradiated from the back side, but allows light to exit from the light-transmitting portion.

[0014] (3) The light-decorating fabric according to (1) or (2), wherein the ultrafine fibers have a triangular cross section.

[0015] In a light-decorating fabric of this configuration, the ultrafine fiber layer has a higher light reflectivity than when it is made up of fibers with a round cross section, and ultimately the light reflectivity of the light-decorating fabric can be increased.

[0016] (4) The fabric for light decoration according to any one of (1) to (3), wherein the fabric is a woven fabric and is configured using, as at least one of the warp and weft threads, a thread formed by bundling a plurality of ultrafine fiber threads made of a plurality of the ultrafine fibers.

[0017] In this light-decorating fabric, the ultrafine fiber threads are arranged in a plane in the ultrafine fiber layer. That is, fibers with a single fiber diameter of 1 μm to 6 μm are arranged in a plane, enabling effective light reflection. Furthermore, if bundled ultrafine fiber threads are used for both the warp and weft, the number of ultrafine fibers overlapping in the thickness direction increases, thereby further enhancing light reflectivity. The weave of the ultrafine fiber layer is not particularly limited, and any of plain weave, twill weave, and satin weave can be used. However, compared to plain weave, twill and satin weaves have fewer intersections between the warp and weft. In other words, gaps are likely to form around the intersections between the warp and weft, but compared to plain weave, twill and satin weaves have fewer intersections between the warp and weft, thereby suppressing an increase in light transmittance.

[0018] (5) The light-decorating fabric according to (4), wherein the through-hole has an inner diameter smaller than the interval set between two adjacent warp threads.

[0019] In the light-decorating fabric of this configuration, the through-holes are smaller than the gaps between the warp threads defined in the weave, and are of a size that is not visible to the human eye. Therefore, in the light-decorating fabric of this configuration, the light-transmitting portions are not visible to the human eye, and the light appears to be transmitting through them.

[0020] In order to solve the above problems, the vehicle interior material disclosed in the present application has the following structure. (6) A vehicle interior material using the light-decorating fabric according to any one of (1) to (5), an interior material body that is the main component constituting the vehicle interior material; The light-decorating fabric serves as a surface covering the interior material body to form a design surface; An illumination device that irradiates light toward the back surface of the light-decorating fabric; An interior material for a vehicle comprising:

[0021] The vehicle interior materials disclosed in the present application can be exemplified by various components that require light display, such as skin materials that cover seats, trim members that cover the walls and ceilings of vehicles, center consoles and instrument panels of automobiles, etc. As described above, the light-decorating fabric also has excellent heat-shielding performance, and is therefore suitable as a skin for vehicle interior materials that are exposed to sunlight in many locations. [Effects of the Invention]

[0022] According to the present invention, it is possible to provide a fabric for light decoration that is suitable for decoration with light, and also to provide a vehicle interior material that is suitable for decoration with light in the interior of a vehicle. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view showing a vehicle door trim as an embodiment of the vehicle interior material of the present invention; [Figure 2] Cross-sectional view of the main part of the door trim [Figure 3] 1 is a plan view schematically showing an ultrafine fiber layer of the light-decorating fabric of this embodiment. [Figure 4] FIG. 1 is a diagram showing a cross section of a fabric for light decoration; [Figure 5] 4 is a cross-sectional perspective view of a composite fiber produced in the process of producing the ultrafine fiber layer shown in FIG. [Figure 6] FIG. 6 is a cross-sectional perspective view showing the state in which ultrafine fibers are extracted from the composite fiber shown in FIG. [Figure 7] FIG. 10 is a perspective view of a tool used to form the light-transmitting portion; DETAILED DESCRIPTION OF THE INVENTION

[0024] The light-decorating fabric 10 of this embodiment is used, for example, as an interior material for a vehicle, and specifically, is used as a door trim 12 for a vehicle shown in Fig. 1. This door trim 12 is an embodiment of a vehicle interior material. Before describing the light-decorating fabric 10 of this embodiment, a schematic configuration of the door trim 12 will be described.

[0025] The door trim 12 is mainly composed of a generally plate-shaped trim board 20. The trim board 20 is assembled with an upper board 21 constituting the upper portion, a lower board 22 constituting the lower portion, and an ornament board 23 disposed between them. The upper board 21 and the lower board 22 are formed of, for example, a synthetic resin material such as polypropylene or a mixture of synthetic resin material and wood-based material. Meanwhile, as shown in FIG. 2, the ornament board 23 is composed of a base material 24 formed of a synthetic resin material such as polypropylene or a mixture of synthetic resin material and wood-based material, and a skin material 26 attached to the base material 24 so as to cover the surface of the base material 24. As shown in FIG. 2, the skin material 26 is composed of a skin layer 26A disposed on the front side (interior side) and a foam layer 26B disposed on the back side (exterior side). The skin layer 26A is the light decorative fabric 10 of this embodiment. The foam layer 26B is made of a foam material such as urethane, and has light-transmitting properties and cushioning properties.

[0026] Additionally, a switch device 30 is provided along the front edge of the ornament board 23. This switch device 30 is used to selectively switch the fore-and-aft position, height, and angle of the driver's seat, the angle of the seatback, etc., from a plurality of preset patterns, and is configured so that an operating unit 30A is illuminated on the surface of the ornament board 23 when the vehicle starts. As shown in FIG. 2 , the switch device 30 includes a switch main body 32, a light-emitting unit 33, and a case 34 that houses the switch main body 32 and the light-emitting unit 33.

[0027] The switch main body 32 is a contact-type sheet switch (film switch) mainly composed of a movable contact sheet 32A on the indoor side and a fixed contact sheet 32B on the indoor side. A light-emitting unit 33 is laminated on the indoor side of the switch main body 32, specifically on the indoor side of the movable contact sheet 32A. The light-emitting unit 33 is made of a nearly transparent synthetic resin material (e.g., acrylic resin such as PMMA or polycarbonate) that has a refractive index significantly higher than that of air. The light-emitting unit 33 receives light from an LED (light source, not shown) located on one side of the light-emitting unit. The light propagates internally, rising toward the skin material 26 and emitting from the entire indoor side surface 33A.

[0028] The light-emitting unit 33 is housed in a case 34, stacked on the indoor side of the switch main body 32, more specifically, on the indoor side of the movable contact sheet 32A. When the case 34 is attached to the base material 24, the indoor side surface 33A is flush with the indoor side surface of the base material 24, and the indoor side surface 33A of the light-emitting unit 33 is in close contact with the back surface (outdoor side surface) of the covering material 26. The light-decorating fabric 10 of this embodiment, which constitutes the covering layer 26A of the covering material 26, is capable of emitting light only from the light-transmitting portion toward the indoor side, as will be described in detail later, and the pattern of the operating unit 30A is projected onto the surface of the ornament board 23, as shown in FIG. 1.

[0029] The switch device 30 of the present embodiment described above is not displayed on the door trim 12 when the vehicle is not started (OFF state), but the operation unit 30A (switch design) is displayed on the door trim 12 when the vehicle is started (ON state). The switch device 30 detects a pressing operation when a part of the movable contact sheet 32A comes into contact with the fixed contact sheet 32B in response to a pressing operation of the operation unit 30A by the occupant. The switch body 32 is connected to the vehicle's control unit, and the fore-and-aft position, height, and angle of the driver's seat, the angle of the seat back, etc. are changed to a selected pattern in response to a switch operation by the occupant.

[0030] Next, the light-decorating fabric 10 of this embodiment will be described in detail. The light-decorating fabric 10 (hereinafter sometimes simply referred to as "fabric 10") is a woven fabric, and as shown in Fig. 3, which is a schematic enlarged view of the surface, is made up of a plurality of warp threads 40 and a plurality of weft threads 42. As shown in Fig. 2, the fabric 10 of this embodiment has a structure woven by repeatedly passing a weft thread 42 under four warp threads 40 and then over one warp thread 40, which is a so-called satin weave.

[0031] The warp yarns 40 are made up of a plurality of warp fibers 40A that are thinner than the plurality of weft fibers 42A that make up the weft yarns 42. As will be explained in detail later, the warp yarns 40 are made of split yarns, whereas the weft yarns 42 are not made of split yarns.

[0032] The warp fibers 40A constituting the warp threads 40 and the weft fibers 42A constituting the weft threads 42 are both made of the same material. An appropriate material can be used depending on the product in which the fabric 10 is used. For example, various synthetic fibers can be used, including polyester fibers such as polyethylene terephthalate (PET) fibers, polybutylene terephthalate fibers, polytrimethylene terephthalate fibers, and polylactic acid fibers; polyamide fibers such as polyamide 6 fibers and polyamide 66 fibers; and polyolefin fibers such as polyacrylic fibers and polypropylene fibers. Specifically, nylon (polyamide) and polyester can be used for clothing, polyester for parasols and sunshades, and PET for the covering material used in vehicle interiors. In other words, in this embodiment, PET fibers are used for the warp fibers 40A and the weft fibers 42A. However, while the weft fibers 42A have a circular cross section, the warp fibers 40A are ultrafine fibers with a triangular cross section and a single fiber diameter (specifically, the diameter of the circumscribed circle) of 1 μm to 6 μm, as shown schematically in FIG. 4. In this embodiment, the warp fibers 40A have a single fiber diameter of approximately 2 μm. That is, the fabric 10 of this embodiment is an ultrafine fiber layer in which a plurality of warp fibers 40A, which are ultrafine fibers, are arranged in a planarly dispersed state. Note that the fabric 10 of this embodiment is formed only from an ultrafine fiber layer, but it may also be configured, for example, such that one warp uses the ultrafine warp fibers 40A and the other warp uses fibers with a fiber diameter larger than the warp fibers 40A, forming a so-called double weave, in which either fiber layer is an ultrafine fiber layer.

[0033] Here, a brief description will be given of a method for manufacturing the warp fibers 40A. First, a composite fiber 50 made of two types of synthetic resins and having the cross-sectional shape shown in FIG. 5 is formed by melt spinning. This composite fiber 50 is hollow and cylindrical, and includes an inner edge portion 52, an outer edge portion 53, a peripheral edge portion 56 having a shape with a plurality of radial portions 54 extending radially from the inner edge portion 52 at equal angular intervals and connecting to the outer edge portion 53, and a plurality (17 in this embodiment) of wedge portions 58 each having a wedge shape (triangular in cross section) that fills the spaces between the radial portions 54. The wedge portions 58 are made of PET, and the peripheral edge portion 56 is made of polyamide. Then, by subjecting this composite fiber 50 to an alkali treatment, the peripheral edge portion 56 is dissolved, leaving only the wedge portions 58, as shown in FIG. 6. The remaining wedge portions 58 become the warp fibers 40A having the triangular cross section described above.

[0034] In this embodiment, a yarn (a so-called split yarn, which corresponds to an ultrafine fiber yarn) made by twisting a plurality of the above composite fibers 50 (in this embodiment, 25 fibers) is used as the warp yarn 40 to form a woven fabric, and the woven fabric is subjected to an alkali treatment to dissolve the peripheral portion 56 and leave only the wedge portion 58, thereby forming a fiber layer in which a large number of warp fibers 40A are densely packed, as shown in Figure 4.

[0035] The warp density of the warp yarns 40 in the fabric 10 of this embodiment is set to 330 threads / inch or more. While a higher warp density improves light reflectivity and strength, it also increases weight and material costs. Therefore, the warp density of the warp yarns 40 is preferably within the range of 330 to 410 threads / inch, and more preferably 360 to 405 threads / inch. The fabric 10 of this embodiment, which has the above warp density, has a configuration in which 140,250 (= 330 threads × number of composite fibers: 25 × number of warp threads: 17) to 174,250 warp fibers 40A per inch in the direction of extension of the weft yarns 42. As described above, the fabric 10 of this embodiment is formed with a satin weave, and therefore the warp yarns 40 are positioned below the weft yarns 42 in only a few places, and are therefore linearly arranged in a horizontal direction. In other words, the warp fibers 40A are arranged closely together in a linear state, enabling effective reflection of light. The weft density of the weft yarns 42 is preferably set within a range of 45 to 120 threads / inch, and more preferably 85 to 97 threads / inch.

[0036] Next, the ultrafine fiber occupancy rate was calculated for the fabric 10 of this embodiment, which is the proportion of the area occupied by the warp fibers 40A, which are ultrafine fibers, in a cross section perpendicular to the direction in which the warp threads 40 extend. The ultrafine fiber occupancy rate (= (the number of ultrafine fibers per inch described above × the cross-sectional area per ultrafine fiber) / (1 inch × the thickness of the fabric 10)) is 9.9% or more, corresponding to a warp density of 330 threads / inch or more. The fabric 10 of this embodiment has an ultrafine fiber layer with an ultrafine fiber occupancy rate of 9.9% or more, and therefore has a light reflectance of 85% or more in the visible light range. Therefore, the door trim 12, which is an interior material for a vehicle of this embodiment, is configured so that the covering material 26 including the light-emitting fabric 10 reflects light from the light-emitting portion 33 and does not allow it to pass through to the passenger compartment.

[0037] As shown in FIG. 3, the light-decorating fabric 10 of this embodiment has a light-transmitting portion 72 formed by a plurality of through holes 70. As shown in FIG. 3, the inner diameter of each through hole 70 is smaller (approximately 35 μm in this embodiment) than the distance between two adjacent warp threads 40 in the weave (approximately 100 μm in this embodiment). The pitch of the through holes 70 is 80 μm. The light-transmitting portion 72 is configured by forming a plurality of through holes 70 at the above pitch in a shape that matches the pattern to be displayed, and the pattern shown in FIG. 1 is displayed by light that passes through these plurality of through holes 70. Due to this configuration, the plurality of through holes 70 that make up the light-transmitting portion 72 cannot be visually recognized by occupants in the vehicle cabin, and the light-decorating fabric 10 of this embodiment can be visually recognized by occupants as if light is passing through.

[0038] The multiple through holes 70 are formed using a tool 76 shown in Fig. 9 in which multiple microneedles 74 are arranged at the above-mentioned specified pitch. More specifically, the tool 76 is heated to a temperature (in this embodiment, about 350°C) that exceeds the melting point (about 270°C) of the material (PET) that forms the warp fibers 40A and weft fibers 42A that make up the light-decorating fabric 10, and pressed against the above-mentioned woven fabric, whereby the microneedles 74 melt the fibers 40A, 42A and form the multiple through holes 70. In other words, the melted PET fibers are solidified on the inner circumferential surface of the through holes 70, and it is possible to prevent the threads from fraying from the through holes 70.

[0039] As described above, the door trim 12, which is a vehicle interior material of this embodiment, employs the light-decorating fabric 10, which has a light reflectance of 85% or more in the visible light range. This eliminates the need to layer a light-blocking material on the covering material 26, thereby suppressing cost increases and simplifying the manufacturing process. Furthermore, the light-decorating fabric 10 of this embodiment has excellent reflectivity not only for visible light but also for the near-infrared range. Therefore, the light-decorating fabric 10 also has excellent heat-blocking properties, making it possible to suppress a temperature rise in the ornament board 23 even when sunlight is irradiated through the window. Therefore, this light-decorating fabric 10 is suitable as a covering material for the upper board 21, which is more exposed to sunlight, and for the instrument panel.

[0040] In order for the fabric used for the light-decorating fabric to have a light reflectance of 85% or more in the visible light range, the fabric 10 of this embodiment has a warp fiber 40A with a single fiber diameter of approximately 2 μm and an ultrafine fiber occupancy of 9.9% or more. However, considering that a larger ultrafine fiber occupancy improves light reflectivity and strength but increases weight and material costs, it is preferable that the ultrafine fiber occupancy be 12.3% or less, corresponding to a warp density of 410 threads / inch or less. Furthermore, it is more preferable that the ultrafine fiber occupancy in the ultrafine fiber layer be 10.8% or more and 12.2% or less, corresponding to a warp density of 60 to 405 threads / inch or less.

[0041] In the fabric 10 of this embodiment, the warp fibers 40A, which are ultrafine fibers, are 2 μm in diameter. However, if smaller ultrafine fibers of 1 μm are used, the cross-sectional area per ultrafine fiber will be smaller but the number of fibers will increase. On the other hand, if ultrafine fibers with a fiber diameter larger than 2 μm are used, the cross-sectional area per ultrafine fiber will be larger but the number of fibers will decrease. Therefore, in either case, the ultrafine fiber occupancy rate will be approximately the same as in this embodiment.

[0042] <Other embodiments> The present invention is not limited to the above-described embodiment, and can be embodied in various forms with various modifications and improvements based on the knowledge of those skilled in the art. For example, the following embodiments are also included within the technical scope of the present invention.

[0043] In the above embodiment, ultrafine fibers are used only for the warp threads 40, but ultrafine fibers may also be used for the weft threads 42. With such a configuration, the light reflecting performance can be further improved.

[0044] In the above embodiment, the light-transmitting portion 72 is formed only in the range corresponding to the displayed pattern, but this is not limiting. For example, if the lighting device emits light bearing a pattern, the light-decorating fabric may have a configuration in which a plurality of through-holes are provided in the area including the pattern or throughout the entire fabric.

[0045] In the above embodiment, the door trim 12 is equipped with a switch device 30, but the switch itself is not essential, and the door trim 12 may be configured to only have a lighting device that irradiates light from the back side of the light-decorating fabric.

[0046] The size and pitch of the multiple through holes forming the light-transmitting portion are not particularly limited, and may be set to an appropriate size and pitch depending on the type of fabric (woven, knitted, nonwoven), the single fiber diameter of the ultrafine fibers, etc.

[0047] In the above embodiment, the main fabric constituting the light-decorating fabric is a woven fabric, but it may also be a knitted fabric, or a nonwoven fabric, etc., as long as it has an ultrafine fiber layer in which ultrafine fibers with a single fiber diameter of 1 μm to 6 μm are dispersed in a plane. Furthermore, although the ultrafine fibers constituting the ultrafine fiber layer are PET fibers, this is not limitative, and various other synthetic fibers, natural fibers, etc., may be used as long as they have a single fiber diameter of 1 μm to 6 μm.

[0048] In the above embodiment, the ultrafine fibers constituting the ultrafine fiber layer have a triangular cross section, but this is not limited thereto, and the ultrafine fibers may have other irregular cross sections or may have a round cross section.

[0049] The light decorative fabric in the above embodiment is used as a covering material for components constituting the door trim of a vehicle, but it can also be used for interior materials such as instrument panels, center consoles, and roof trims, and can also be used as a covering material for seats.

[0050] The light-decorating fabric disclosed in the present application can be used to decorate buildings as well as vehicles. [Explanation of symbols]

[0051] 10...Light-decorating fabric (ultrafine fiber layer), 12...door trim (vehicle interior material), 23...ornament board, 24...base material (interior material main body), 26...skin material, 26A...skin layer (light-decorating fabric), 33...light-emitting portion (lighting device), 40...warp thread, 40A...warp fiber (ultrafine fiber), 42...weft thread, 70...through hole, 72...light-transmitting portion

Claims

1. A light-decorating fabric for decorating with light, The fabric contains ultrafine fibers with a single fiber diameter of 1 μm or more and 6 μm or less, and the decoration is performed by transmitting light through the light-transmitting portion. the fabric has an ultrafine fiber layer in which a plurality of the ultrafine fibers are arranged in a planar dispersed state and has a light reflectance of 85% or more; The light-transmitting portion is formed by a plurality of through holes.

2. 2. The light-decorating fabric according to claim 1, wherein the ultrafine fiber layer has an ultrafine fiber occupancy rate, which is the ratio of an area occupied by the ultrafine fibers in a cross section perpendicular to the direction in which the ultrafine fibers extend, of 9.9% or more.

3. 3. The light-decorating fabric according to claim 1, wherein the ultrafine fibers have a triangular cross section.

4. 4. The fabric for light decoration according to claim 1, wherein the fabric is a woven fabric and is configured using, as at least one of warp threads and weft threads, threads each consisting of a bundle of ultrafine fiber threads made of a plurality of the ultrafine fibers.

5. The light-decorating fabric according to claim 4 , wherein the through-holes have an inner diameter smaller than a distance set between two adjacent warp threads.

6. A vehicle interior material using the light-decorating fabric according to claim 1 or 2, an interior material body that is the main component constituting the vehicle interior material; The light-decorating fabric serves as a surface covering the interior material body to form a design surface; An illumination device that irradiates light toward the back surface of the light-decorating fabric; An interior material for a vehicle comprising:

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