Light-transmissive decorative sheet material, method for manufacturing same, and display material for projection

Abstract

The problem addressed by the present invention is to provide a decorative sheet material colored in a color other than white, having light transmissivity, and having concealing properties when a light source is off. The problem is solved by a light-transmissive decorative sheet material comprising a light-transmissive substrate and a colored portion that contains a metal element and / or a metalloid element and is disposed on at least one surface of the substrate, wherein the total light transmittance is 25% or less.

Description

Light-transmitting design sheet material, its manufacturing method, and projection display material

[0001] The present invention relates to a light-transmitting design sheet material, a method for producing the same, a projection display material, and the like.

[0002] Conventionally, light-transmitting decorative sheet materials that diffuse and transmit light inside have been used as various interior and exterior materials. Specifically, for example, an interior design has been proposed in which a sheet material such as a light-transmitting fabric or artificial leather is placed over a light source, so that the back side (the light source side) is not visible when the light source is not turned on, but light transmits through the sheet and lights up the sheet (for example, the mark on a device switch) when the light source is turned on.

[0003] Patent Document 1 proposes a light-transmitting conductive laminate that has good design, does not change in appearance quality even with repeated input operations, and can be molded into a shape with excellent operability. Patent Document 2 also proposes artificial leather for light-transmitting display devices that has sufficient light transmittance and can suppress deterioration in appearance quality due to repeated use.

[0004] Japanese Patent No. 6911394 Japanese Patent Application Laid-Open No. 2021-031792

[0005] However, the above-mentioned light-transmitting design sheet material usually has a white appearance because it needs to have the function of diffusing light internally. When colored with a dye, the dye covers the sheet material or penetrates into the interior of the sheet material, resulting in a loss of light transmittance. Although artificial leathers are available that are colored by using a colored resin layer, light does not pass through the colored resin layer. It has been difficult to achieve both light transmittance and coloration in light-transmitting design sheet materials. On the other hand, reducing the density of the substrate can achieve both light transmittance and coloration, but this impairs the concealing ability when the light source is off, resulting in a lack of design appeal as an interior or exterior decoration.

[0006] An object of the present invention is to provide a decorative sheet material that is colored in a color other than white, has light transmittance, and has concealing properties when the light source is not lit.

[0007] In view of the above-mentioned problems, the present inventors have conducted extensive research and found that the above-mentioned problems can be solved by a light-transmitting design sheet material that includes a light-transmitting substrate and a colored portion containing a metal element and / or a metalloid element, which is disposed on at least one surface of the substrate, and has a total light transmittance of 25% or less. Based on this finding, the present inventors have conducted further research and have completed the present invention. That is, the present invention includes the following aspects.

[0008] Item 1. A light-transmitting design sheet material comprising a light-transmitting substrate and a colored portion containing a metal element and / or a semi-metal element arranged on at least one surface of the light-transmitting substrate, the light-transmitting design sheet material having a total light transmittance of 25% or less.

[0009] Item 2. The light-transmitting design sheet material according to Item 1, wherein the colored portion is attached to the surface of the light-transmitting substrate.

[0010] Item 3. The colored portion has a density of 1 μg / cm 2 relative to the light-transmitting substrate. ２ 100 μg / cm or more ２ Item 3. The light-transmitting designable sheet material according to item 1 or 2, wherein the light-transmitting designable sheet material is attached in the following amount:

[0011] Item 4. The light-transmitting design sheet material according to any one of Items 1 to 3, wherein the light-transmitting substrate is a white fabric.

[0012] Item 5. The light-transmitting design sheet material according to Item 4, wherein the total light transmittance of the fabric is 0.5% or more and 30% or less.

[0013] Item 6. The light-transmitting design sheet material according to Item 4 or 5, wherein the haze of the fabric is 80 or more.

[0014] Item 7. The light-transmitting decorative sheet material according to any one of Items 4 to 6, wherein the surface of the fabric is raised, and the colored portion is attached to at least a portion of the raised portion.

[0015] Item 8. The light-transmitting design sheet material according to any one of Items 1 to 3, wherein the light-transmitting design sheet material is artificial leather and the light-transmitting substrate is a resin sheet.

[0016] Item 9. The light-transmitting design sheet material according to Item 8, comprising a white light-transmitting base fabric, and wherein the light-transmitting base fabric, the colored portion, and the resin sheet are laminated in this order.

[0017] Item 10. The light-transmitting design sheet material according to Item 9, wherein an adhesive layer is disposed between the light-transmitting base fabric and the colored portion.

[0018] Item 11. The light-transmitting decorative sheet material according to any one of Items 1 to 10, wherein the colored portion contains at least one metalloid selected from the group consisting of silicon, germanium, antimony, tellurium, boron, phosphorus, bismuth, and selenium.

[0019] Item 12. The light-transmitting decorative sheet material according to any one of Items 1 to 11, wherein the colored portion contains at least one metal selected from the group consisting of silver, aluminum, and titanium.

[0020] Item 13. The light-transmitting design sheet material according to any one of Items 1 to 12, wherein the colored portion includes a metal portion containing a metal and a semi-metal portion containing a semi-metal, and the metal portion and the semi-metal portion are laminated.

[0021] Item 14. The light-transmitting design sheet material according to any one of Items 1 to 13, wherein optical interference occurs due to lamination of the metal part and the semi-metal part.

[0022] Item 15. The light-transmitting design sheet material according to any one of Items 1 to 14, wherein the colored portion has an average thickness of 10 nm or more and 500 nm or less.

[0023] Item 16. The light-transmitting design sheet material according to any one of Items 1 to 15, wherein the thickness of the light-transmitting substrate is 100 μm or more and 2000 μm or less.

[0024] Item 17. The light-transmitting design sheet material according to any one of Items 1 to 16, wherein the colored portion is attached to the light-transmitting substrate by at least one method selected from the group consisting of sputtering, vacuum deposition, ion plating, chemical vapor deposition, and pulsed laser deposition.

[0025] Item 18. A method for producing a light-transmitting design sheet material according to any one of Items 4 to 7, comprising forming a colored portion on one side of a white fabric having a total light transmittance of 10% or more by at least one method selected from the group consisting of sputtering, vacuum deposition, ion plating, chemical vapor deposition, and pulsed laser deposition, to obtain a light-transmitting design sheet material having a total light transmittance of 25% or less.

[0026] Item 19. A method for producing a light-transmitting design sheet material according to any one of Items 8 to 10, comprising forming a colored portion on one surface of a light-transmitting resin sheet by at least one method selected from the group consisting of sputtering, vacuum deposition, ion plating, chemical vapor deposition, and pulsed laser deposition, and laminating a white light-transmitting base fabric on the colored portion to obtain a light-transmitting design sheet material having a total light transmittance of 25% or less.

[0027] Item 20. A projection display material comprising the light-transmitting design sheet material according to item 1.

[0028] Item 21. The projection display material according to Item 20, comprising a light-transmitting foam or a light-transmitting gel material on the surface of the light-transmitting design sheet material.

[0029] Item 22. The projection display material according to Item 20, comprising a light-transmitting foam on a surface of the light-transmitting design sheet material, and a printed wiring type heater on the light-transmitting foam.

[0030] According to the present invention, it is possible to provide a decorative sheet material that is colored in a color other than white, has light transmittance, and has concealing properties when the light source is not lit.

[0031] 1 shows a schematic diagram of an embodiment of the sheet material of the present invention when substrate A is used as the light-transmitting substrate. 2 shows a schematic diagram of an embodiment of the sheet material of the present invention when substrate A is a fabric and is raised. 3 shows a schematic diagram of an embodiment of the sheet material of the present invention when substrate B is used as the light-transmitting substrate.

[0032] In this specification, the expressions "contain" and "comprise" include the concepts of "contain," "comprise," "consist essentially of," and "consist only of."

[0033] In one aspect, the present invention relates to a light-transmitting designable sheet material (sometimes referred to in this specification as the "sheet material of the present invention") that includes a light-transmitting substrate and a colored portion that contains a metal element and / or a semi-metal element and is arranged on at least one surface of the substrate, and that has a total light transmittance of 25% or less.

[0034] The light-transmitting substrate is not particularly limited as long as it is in a sheet form and has light transmittance, and examples of the light-transmitting substrate include fabric and resin sheets.

[0035] The layer structure of the light-transmitting substrate is not particularly limited. The light-transmitting substrate may be composed of a single type of substrate or a combination of two or more types of substrates.

[0036] The light-transmitting substrate is preferably white. This makes it easier to adjust the color of the sheet material of the present invention by adjusting the color of the colored portion. In the present invention, "white" refers to a color having an L value of 70 or more in the L*a*b* color system measured in accordance with JIS Z8781-4:2013.

[0037] As the light-transmitting substrate, it is preferable to use a substrate (substrate A) having relatively high light transmittance and relatively high haze, from the viewpoint of transmitting light while diffusing the light and reducing unevenness in the light transmitted through the sheet material of the present invention when the light source is turned on, thereby enhancing the design. As such a substrate, fabric can be suitably used, but the above-mentioned resin sheet can also be used without being limited thereto.

[0038] The fabric is not particularly limited as long as it is a substrate containing fibers or fiber bundles as a material and is in a sheet form. The fabric may contain components other than fibers and fiber bundles as long as the effects of the present invention are not significantly impaired. In such cases, the total amount of fibers and fiber bundles in the fabric is, for example, 50% by mass or more, preferably 60% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 90% by mass or more, particularly preferably 95% by mass or more, and particularly preferably 99% by mass or more, and is usually less than 100% by mass. Examples of fabrics include woven fabrics (e.g., plain weave, twill weave, satin weave, etc.), knitted fabrics, nonwoven fabrics, etc. In one aspect of the present invention, the fabric preferably has a brushed surface.

[0039] The fibers constituting the fabric are not particularly limited, and examples thereof include inorganic fibers such as carbon fibers (e.g., PAN-based carbon fibers, pitch-based carbon fibers, carbon nanotubes, etc.), glass fibers (e.g., glass wool, glass fiber, etc.), mineral fibers (e.g., chrysotile asbestos, white asbestos, blue asbestos, brown asbestos, direct asbestos, tremolite asbestos, and exothermic asbestos), artificial mineral fibers (e.g., rock wool, ceramic fiber, etc.), and metal fibers (e.g., stainless steel fiber, aluminum fiber, iron fiber, nickel fiber, copper fiber, etc.); A wide variety of organic fibers can be used, including synthetic fibers (e.g., nylon fibers, polyester fibers, acrylic fibers, vinylon fibers, polyolefin fibers, polyethylene fibers, polypropylene fibers, polyurethane fibers, etc.), regenerated fibers (e.g., rayon, polynosic, cupra, lyocell, acetate, etc.), plant fibers (e.g., cotton fibers, hemp fibers, flax fibers, rayon fibers, polynosic fibers, cupra fibers, lyocell fibers, acetate fibers, etc.), and animal fibers (e.g., wool, silk, wild silk, mohair, cashmere, camel, llama, alpaca, vicuna, angora, spider silk, etc.).

[0040] The form of the fiber may be any of continuous filaments, short fibers obtained by cutting continuous filaments, milled yarns obtained by pulverizing into powder, and the like.

[0041] The fibers may be of one type alone or a combination of two or more types.

[0042] The fiber bundle is not particularly limited as long as it is made up of a plurality of fibers. The number of fibers constituting the fiber bundle is, for example, 10 or more, 100 or more, 500 or more, or 1000 or more, and is, for example, 50,000 or less, 40,000 or less, or 20,000 or less.

[0043] The total light transmittance of the substrate A such as a fabric is preferably 0.5% or more and 30% or less, more preferably 1% or more and 25% or less, even more preferably 2% or more and 25% or less, and still more preferably 5% or more and 22% or less, from the viewpoints of the light transmittance of the sheet material of the present invention and ease of adjusting the total light transmittance of the sheet material of the present invention to a predetermined range.

[0044] The total light transmittance of the substrate A such as fabric is measured as follows.

[0045] The haze of the substrate A such as a fabric is preferably 40 or more, more preferably 50 or more, even more preferably 60 or more, still more preferably 70 or more, especially preferably 80 or more, especially more preferably 85 to 98, especially more preferably 90 to 96, and particularly preferably 90 to 95, from the viewpoints of ease of adjusting the light transmittance as a substrate, the light transmittance of the sheet material of the present invention, the total light transmittance of the sheet material of the present invention, and the like, within predetermined ranges, and from the viewpoint of reducing unevenness in light passing through the sheet material of the present invention when the light source is turned on and thereby enhancing design properties.

[0046] The haze of the substrate A such as fabric was measured as follows: The measurement was carried out using a haze meter ("NDH-2000" manufactured by Nippon Denshoku Co., Ltd. or an equivalent product) in accordance with JIS K7105.

[0047] The fabric weight is preferably 10 g / m from the viewpoint of ease of adjusting the light transmittance as a substrate, the light transmittance of the sheet material of the present invention, the total light transmittance of the sheet material of the present invention, etc., to a predetermined range. ２ More than 400g / m ２ or less, more preferably 20 g / m ２ More than 300g / m ２ More preferably 90 g / m or less ２ More than 250g / m ２ The following is the result.

[0048] The thickness of the fabric is preferably 100 μm or more and 2000 μm or less, more preferably 200 μm or more and 1500 μm or less, and even more preferably 200 μm or more and 1000 μm or less, from the viewpoint of ease of adjusting the light transmittance as a substrate, the light transmittance of the sheet material of the present invention, the total light transmittance of the sheet material of the present invention, etc., within predetermined ranges.

[0049] As the light-transmitting substrate, it is preferable to use a substrate (substrate B) having relatively high light transmittance and relatively low haze, from the viewpoints of transmitting light, protecting the surface of the sheet material of the present invention, and allowing the surface shape to be freely formed, etc. As such a substrate, a resin sheet can be suitably used, but is not limited thereto.

[0050] The resin sheet is not particularly limited as long as it is a substrate containing a resin as a material and is in a sheet form. The resin sheet may contain components other than resin as long as the effects of the present invention are not significantly impaired. In this case, the total amount of resin in the resin sheet is, for example, 80% by mass or more, preferably 90% by mass or more, more preferably 95% by mass or more, and even more preferably 99% by mass or more, and is usually less than 100% by mass.

[0051] The resin is not particularly limited, and examples thereof include polyester resins such as polyethylene terephthalate (PET), polyethylene naphthalate, and modified polyester; polyolefin resins such as polyethylene (PE) resin, polypropylene (PP) resin, polystyrene resin, and cyclic olefin resin; vinyl resins such as polyvinyl chloride and polyvinylidene chloride; polyvinyl acetal resins such as polyvinyl butyral (PVB); polyether ether ketone (PEEK) resin, polysulfone (PSF) resin, polyethersulfone (PES) resin, polycarbonate (PC) resin, polyamide resin, polyimide resin, acrylic resin, polyurethane resin, and triacetyl cellulose (TAC) resin.

[0052] From the viewpoint of design, the resin sheet preferably imitates the surface shape of fabric, leather, etc. Examples of the resin sheet include a resin sheet (for example, an embossed sheet) having on its surface irregularities that are the same as or similar to the irregularities on the surface of fabric, leather, etc.

[0053] The total light transmittance of the substrate B such as a resin sheet is preferably 10% or more, more preferably 20% or more, even more preferably 80% or more, and still more preferably 90% or more.

[0054] The method for measuring the total light transmittance of the substrate B such as a resin sheet is the same as that for the substrate A.

[0055] The haze of the substrate B such as a resin sheet is preferably 99 or less, more preferably 90 or less, even more preferably 80 or less, and still more preferably 70 or less.

[0056] The haze of the substrate B such as a resin sheet is measured in the same manner as that of the substrate A.

[0057] The thickness of the substrate B such as a resin sheet is preferably 1 μm or more and 500 μm or less, more preferably 1 μm or more and 100 μm or less, and even more preferably 5 μm or more and 50 μm or less.

[0058] The colored portion is a layer containing a metal, semi-metal, alloy, or metal compound or semi-metal compound containing a metal element and / or a semi-metal element as a material (metal element / metalloid element material). The metal element / metalloid element material is not particularly limited as long as it can be colored, preferably as long as it can be colored by optical interference. The colored portion may contain components other than the metal element / metalloid element material. In such cases, the content of the metal element / metalloid element material in the colored portion is, relative to 100% by mass of the colored portion, for example, 70% by mass or more, preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, and even more preferably 99% by mass or more, and is usually less than 100% by mass.

[0059] The content of metal element / metalloid element materials can be measured and calculated as follows. Analysis is performed using a scanning X-ray fluorescence analyzer (e.g., a Rigaku ZSX Primus III+ scanning X-ray fluorescence analyzer or equivalent) with an acceleration voltage of 50 kV, an acceleration current of 50 mA, and an integration time of 60 seconds. The X-ray intensity of the Kα ray of the metal component to be measured is measured, and the intensity at the background position as well as the peak position is measured so that the net intensity can be calculated. The measured intensity value can be converted to the content using a previously prepared calibration curve. The same sample is analyzed five times, and the average value is used as the average content.

[0060] Examples of metal elements include silver, aluminum, titanium, chromium, copper, etc. Among these, from the viewpoint of color tone adjustment, silver, aluminum, titanium, etc. are preferred, and aluminum is particularly preferred.

[0061] The metal elements may be one type alone or a combination of two or more types.

[0062] Examples of metalloid elements include silicon, germanium, antimony, tellurium, boron, phosphorus, bismuth, selenium, etc. Among these, from the viewpoint of color tone adjustment, silicon, germanium, antimony, tellurium, boron, phosphorus, bismuth, selenium, etc. are preferred, and silicon is particularly preferred.

[0063] The metalloid elements may be one type alone or a combination of two or more types.

[0064] Examples of metals contained in the metal element / metalloid element material include silver, aluminum, titanium, etc. Among these, from the viewpoints of durability, design, etc., silver, aluminum, titanium, etc. are preferred, and aluminum is particularly preferred.

[0065] The metal may be one kind alone or a combination of two or more kinds.

[0066] Examples of metalloids contained in the metal element / metalloid element material include silicon, germanium, antimony, tellurium, boron, phosphorus, bismuth, selenium, etc. Among these, from the viewpoints of durability, design, etc., preferred are silicon, germanium, antimony, tellurium, boron, phosphorus, bismuth, and selenium, and particularly preferred is silicon.

[0067] The metalloids may be one type alone or two or more types in combination.

[0068] The metal compound is not particularly limited, but examples thereof include oxides, nitrides, sulfides, etc. Among these, oxides are preferred.

[0069] The average thickness of the colored portion is preferably 10 nm or more and 500 nm or less, more preferably 10 nm or more and 200 nm or less, and even more preferably 10 nm or more and 100 nm or less, from the viewpoint of colorability, etc., from the viewpoint of the light transmittance of the sheet material of the present invention, the ease of adjusting the total light transmittance of the sheet material of the present invention, etc., to a predetermined range.

[0070] The average thickness of the colored portion is measured as follows. Specifically, analysis is performed using a scanning X-ray fluorescence analyzer (e.g., a Rigaku ZSX Primus III+ scanning X-ray fluorescence analyzer or equivalent) with an acceleration voltage of 50 kV, an acceleration current of 50 mA, and an integration time of 60 seconds. The X-ray intensity of the Kα ray of the metal component to be measured is measured, and the intensity at the background position as well as the peak position is measured so that the net intensity can be calculated. The measured intensity value can be converted to thickness using a calibration curve created in advance. The same sample is analyzed five times, and the average value is taken as the thickness.

[0071] The colored portion is disposed on at least one surface (i.e., one surface or both surfaces) of the light-transmitting substrate, and preferably, the colored portion is disposed on only one surface of the light-transmitting substrate.

[0072] The colored portion is preferably attached to the surface of the light-transmitting substrate (i.e., no other region or component is present between the colored portion and the surface of the light-transmitting substrate). In this case, from the viewpoint of colorability and the ease of adjusting the light transmittance and total light transmittance of the sheet material of the present invention to a predetermined range, the colored portion is preferably attached to the light-transmitting substrate in an amount of 1 μg / cm ２ More than 500μg / cm ２ or less, more preferably 2 μg / cm ２ 100 μg / cm or more ２ More preferably, 2 μg / cm ２ 40 μg / cm or more ２ Below, particularly preferably 2 μg / cm ２ 20 μg / cm or more ２ It is preferable that the coating amount is as follows:

[0073] When aluminum and silicon are used as the coloring portion, the coloring portion is preferably 2 μg / cm ２ 40 μg / cm or more ２ or less, more preferably 2 μg / cm ２ 20 μg / cm or more ２ When titanium is contained in the colored portion, the colored portion preferably has a coating amount of 2 μg / cm ２ 100 μg / cm or more ２ or less, more preferably 2 μg / cm ２ More than 70μg / cm ２ More preferably, 2 μg / cm ２ More than 40ug / cm ２ It is preferable that the coating amount is as follows:

[0074] The method for measuring the amount of adhesion of the colored portion is as follows. Specifically, a sample before the formation of the colored portion is cut into a piece of 100 cm x 100 cm, and the weight of this piece is measured and used as the basis weight. A sample after the formation of the colored portion is cut into a piece of 100 cm x 100 cm, and the difference between this and the basis weight of the substrate is used as the amount of adhesion (μg / cm ２) When the colored portion is adhered to the substrate in the order of the metal portion and the semi-metal portion, the substrate, the sample with the metal portion adhered to the substrate, and the sample with the metal portion and semi-metal portion adhered to the substrate are each cut to a size of 100 cm x 100 cm, and the weights are measured and taken as the basis weight. The difference in the basis weight of the substrate, the sample with the metal portion adhered to the substrate, and the sample with the metal portion and semi-metal portion adhered to the substrate is taken as the adhesion amount of the metal portion, the adhesion amount of the semi-metal portion, and the total adhesion amount of the colored portion (μg / cm ２ )

[0075] The layer structure of the colored portion is not particularly limited. The colored portion may be a single layer or may be composed of multiple layers having the same or different compositions. Furthermore, the colored portion may have a coating such as an oxide coating on one or both of its two main surfaces.

[0076] The colored portion preferably includes a metal portion containing a metal and a semi-metal portion containing a metalloid, and the metal portion and the semi-metal portion are laminated (more preferably, the metal portion and the semi-metal portion are in contact with each other). This makes it easier to generate optical interference due to the lamination of the metal portion and the semi-metal portion, allowing for more effective coloring. For example, when the light-transmitting substrate is substrate A (particularly in the cases of FIGS. 1 and 2 described below), it is preferable that the metal portion is disposed on the light-transmitting substrate side in the colored portion, and the semi-metal portion is disposed on the opposite side of the light-transmitting substrate side. As another example, when the light-transmitting substrate is substrate B (particularly in the case of FIG. 3 described below), it is preferable that the metal portion is disposed on the opposite side of the light-transmitting substrate side in the colored portion, and the semi-metal portion is disposed on the light-transmitting substrate side.

[0077] The metal content in the metal portion is, relative to 100% by mass of the metal portion, for example, 70% by mass or more, preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, and still more preferably 99% by mass or more, and is usually less than 100% by mass.

[0078] The content of the metalloid in the metalloid portion is, relative to 100% by mass of the metalloid portion, for example, 70% by mass or more, preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, and still more preferably 99% by mass or more, and is usually less than 100% by mass.

[0079] The average thickness of the metal part is preferably 1 nm or more and 500 nm or less, more preferably 1 nm or more and 200 nm or less, and even more preferably 1 nm or more and 100 nm or less, from the viewpoints of the light transmittance of the sheet material of the present invention, the ease of adjusting the total light transmittance of the sheet material of the present invention within a predetermined range, and colorability.

[0080] The average thickness of the semi-metal portion is preferably 1 nm or more and 500 nm or less, more preferably 1 nm or more and 200 nm or less, and even more preferably 1 nm or more and 100 nm or less, from the viewpoint of colorability, etc., from the viewpoint of the light transmittance of the sheet material of the present invention, the ease of adjusting the total light transmittance of the sheet material of the present invention, etc., to a predetermined range.

[0081] The sheet material of the present invention has a total light transmittance of 25% or less. This ensures concealing properties. From the viewpoint of concealing properties, the total light transmittance of the sheet material of the present invention is preferably 20% or less, more preferably 15% or less, even more preferably 12% or less, even more preferably 10% or less, and particularly preferably 8% or less. The total light transmittance of the sheet material of the present invention can be adjusted, for example, by adjusting the thickness of the colored portion, the thickness of the light-transmitting substrate, etc. Specifically, for example, the total light transmittance of the sheet material of the present invention can be reduced by increasing the thickness of the colored portion and / or the thickness of the light-transmitting substrate.

[0082] The sheet material of the present invention has light transparency. By using a light-transmitting substrate and forming a colored portion with a metal element and / or a metalloid element, it is possible to achieve both colorability and light transparency. The total light transmittance of the sheet material of the present invention is preferably 0.1% or more, more preferably 0.5% or more, even more preferably 1.0% or more, still more preferably 1.5% or more, particularly preferably 2.0% or more, and particularly preferably 2.5% or more.

[0083] The total light transmittance of the sheet material of the present invention was measured using a haze meter ("NDH-2000" manufactured by Nippon Denshoku Co., Ltd. or an equivalent product) in accordance with JIS K7105.

[0084] More specific examples of the sheet material of the present invention will now be described.

[0085] In one embodiment, the sheet material of the present invention is a sheet material (preferably a fabric sheet material) that employs a substrate A (preferably a white fabric) as the light-transmitting substrate. A schematic diagram of one embodiment of the sheet material of the present invention when substrate A is used as the light-transmitting substrate is shown in FIG. 1 . In this embodiment, for example, if a light source such as a projector is disposed on the light-transmitting substrate 2 side, when viewed from the colored portion 1 side, the light source cannot be seen when the light source is off, but when the light source is on, the light from the light source is diffused by the light-transmitting substrate 2 and is visible as colored by the colored portion. This allows for a high level of designability.

[0086] In the embodiment of Fig. 1, when the light-transmitting substrate 2 is fabric, the colored portion 1 is attached to the fiber surface of the fabric. As an example, Fig. 2 shows a schematic diagram of one embodiment of the sheet material of the present invention when the light-transmitting substrate 2 is fabric and is raised in the embodiment of Fig. 1. In this embodiment, the colored portion 1 is attached to the surface layer portion of the raised portion 3. The colored portion can be attached to at least a part of the raised portion.

[0087] In one embodiment, the sheet material of the present invention is a sheet material (preferably artificial leather) that employs a substrate B (preferably a resin sheet) as the light-transmitting substrate. In this specification, artificial leather refers to a sheet-like material artificially made to resemble leather, and also includes so-called synthetic leather. In this embodiment, the artificial leather preferably includes a white light-transmitting base fabric, and the light-transmitting base fabric, colored portion, and resin sheet are laminated in this order. In this case, an adhesive layer is preferably disposed between the light-transmitting base fabric and the colored portion. The light-transmitting base fabric is not particularly limited and may be the same as the fabric described above. A schematic diagram of one embodiment of the sheet material of the present invention in which substrate B is used as the light-transmitting substrate is shown in FIG. 3. In this embodiment, for example, if a light source such as a projector is placed on the light-transmitting base fabric 5 side, when viewed from the light-transmitting substrate 2 side, the light source cannot be seen when the light source is off, but when the light source is on, the light from the light source is diffused by the light-transmitting base fabric 5 and is visible as colored by the colored portion. This provides a high level of designability.

[0088] The adhesive layer is not particularly limited as long as it has adhesiveness, and typically contains a pressure-sensitive adhesive, such as an acrylic pressure-sensitive adhesive, a urethane pressure-sensitive adhesive, a polyolefin pressure-sensitive adhesive, a polyester pressure-sensitive adhesive, a vinyl alkyl ether pressure-sensitive adhesive, a polyamide pressure-sensitive adhesive, a rubber pressure-sensitive adhesive, a silicone pressure-sensitive adhesive, or a fluorine-based pressure-sensitive adhesive.

[0089] The sheet material of the present invention can be produced, for example, by a method including a step of forming a colored portion on the surface of a light-transmitting substrate.

[0090] Although not particularly limited, the formation can be carried out by, for example, a sputtering method, a vacuum deposition method, an ion plating method, a chemical vapor deposition method, a pulsed laser deposition method, etc. Among these, a sputtering method is preferred from the viewpoint of film thickness controllability.

[0091] The sputtering method is not particularly limited, but examples thereof include DC magnetron sputtering, radio frequency magnetron sputtering, ion beam sputtering, etc. The sputtering apparatus may be of a batch type or a roll-to-roll type.

[0092] In one aspect of the present invention, when a fabric sheet material is produced, it can be produced by a method that includes forming a colored portion on one side of a white fabric having a total light transmittance of 10% or more by at least one method selected from the group consisting of sputtering, vacuum deposition, ion plating, chemical vapor deposition, and pulsed laser deposition, thereby obtaining a light-transmitting decorative sheet material having a total light transmittance of 25% or less.

[0093] In one embodiment of the present invention, when producing artificial leather, it can be produced by a method comprising forming a colored portion on one side of a light-transmitting resin sheet by at least one method selected from the group consisting of sputtering, vacuum deposition, ion plating, chemical vapor deposition, and pulsed laser deposition, and laminating a white light-transmitting base fabric on the colored portion to obtain a light-transmitting design sheet material having a total light transmittance of 25% or less.

[0094] The use of the sheet material of the present invention is not particularly limited. The sheet material of the present invention is used, for example, as an interior or exterior material for a vehicle such as an automobile by placing it over a light source. By placing it over a light source, an image can be projected onto the sheet material, and it can be used as a display material.

[0095] The light source is not particularly limited, and examples thereof include a projector, an LED light, and a touch sensor.

[0096] When the sheet material of the present invention is placed over a light source, it is preferable to place a light-transmitting gel material or a light-transmitting foam material between the light source and the sheet material, which can impart a soft feel to the sheet material in addition to the design.

[0097] Furthermore, by providing wiring on the surface of the above-mentioned light-transmitting foam material by screen printing, it can be given the function of a heater. Also, by controlling the light source on the back side, it can be used as a touch sensor to represent the ON / OFF switch of the heater, and the ON / OFF status of the heater can be visually confirmed.

[0098] The present invention will be described in detail below based on examples, but the present invention is not limited to these examples.

[0099] (1) Production of Sheet Material (Example 1) Fabric 1 was used as a substrate. The substrate was placed in a vacuum device, and a 5.0 × 10 －４ The chamber was evacuated to a vacuum of 100 Pa or less. Subsequently, argon gas was introduced, and a metal portion made of aluminum (Al) (deposition amount 4.6 μg / cm ) was deposited on the surface of the substrate by DC magnetron sputtering. ２ , average thickness 17 nm) was attached to the metal part, and then a semimetal part made of silicon (Si) (attachment amount 4.7 μg / cm ２ , average thickness 20 nm) was deposited.

[0100] (Example 6) A 30 μm polyurethane film (PU film) was placed in a vacuum chamber as a substrate, and a 5.0×10 －４ The chamber was evacuated to a vacuum of 100 Pa or less. Subsequently, argon gas was introduced, and a semi-metallic portion made of silicon (Si) (adhesion amount 4.7 μg / cm ) was deposited on the surface of the substrate by DC magnetron sputtering. ２ ) was attached to the semi-metallic part, and then a metal part made of aluminum (Al) (attachment amount 9.7 μg / cm ２ The metal part and fabric 3 (basis weight: 180 g / m ２ , haze: 92, total light transmittance: 20.22) was attached with a urethane adhesive.

[0101] (Examples 2 to 5, 7 to 9, and 12 and Comparative Examples 3 and 4) Sheet materials were obtained in the same manner as in Example 1, except that the fabrics shown in Tables 1 and 3 were used as the substrates and the amounts of the metal parts and semi-metal parts attached were as shown in Tables 1 and 3.

[0102] (Example 10) Fabric 1 was used as the substrate. The substrate was placed in a vacuum device, and a 5.0 × 10 －４ The chamber was evacuated to a vacuum of 100 Pa or less. Subsequently, argon gas was introduced, and a metal portion made of titanium (Ti) (adhesion amount 40 μg / cm ) was deposited on the surface of the substrate by DC magnetron sputtering. ２ , average thickness 80 nm) was deposited.

[0103] (Example 11) Fabric 1 was used as the substrate. The substrate was placed in a vacuum device, and a 5.0 × 10 －４ The chamber was evacuated to a vacuum of 100 Pa or less. Subsequently, argon gas was introduced, and a metal portion made of titanium (Ti) (adhesion amount 40 μg / cm ) was deposited on the surface of the substrate by DC magnetron sputtering. ２ , average thickness 80 nm) was attached to the metal part, and then a semimetal part made of silicon (Si) (attachment amount 30 μg / cm ２ , average thickness 120 nm) was deposited.

[0104] (Example 13) Fabric 3 was used as the substrate. The substrate was placed in a vacuum device, and a 5.0 × 10 －４ The chamber was evacuated to a vacuum of 100 Pa or less. Subsequently, argon gas was introduced, and a metal portion made of aluminum (Al) (deposition amount 11 μg / cm ) was deposited on the surface of the substrate by DC magnetron sputtering. ２ , average thickness 40 nm) was attached, and then a semi-metallic part made of silicon (Si) (adhesion amount 6 μg / cm ) was attached on the metal part made of aluminum (Al). ２ , average thickness 25 nm) was deposited, and then a metal part made of aluminum (Al) (deposition amount 2.7 μg / cm ) was deposited on the semimetal part made of silicon (Si). ２ , average thickness 30 nm) was deposited, and then a semi-metallic part made of silicon carbide (SiC) (deposition amount 10 μg / cm ) was deposited on the metal part made of aluminum (Al). ２ , average thickness 25 nm) was deposited.

[0105] Comparative Example 1 Fabric 5 was dyed with a dyeing agent to prepare a sheet material.

[0106] Comparative Example 2 Fabric 2 was used as a sheet material as it was.

[0107] (Comparative Example 5) Fabric 6 was used as the substrate. The substrate was placed in a vacuum device, and a 5.0 × 10 －４ The chamber was evacuated to a vacuum of 100 Pa or less. Subsequently, argon gas was introduced, and a metal portion made of titanium (Ti) (adhesion amount 90 μg / cm ) was deposited on the surface of the substrate by DC magnetron sputtering. ２ , average thickness 200 nm) was attached to the metal part, and then a semi-metal part made of silicon (Si) (attachment amount 30 μg / cm ２ , average thickness 120 nm) was deposited.

[0108] Details of Fabrics 2 to 7 in Tables 1 to 3 are as follows:

[0109] Fabric 2 (white, basis weight: 220 g / m ２ , Haze: 92.42, Total light transmittance: 14.94%) Fabric 3 (basis weight: 180 g / m ２ , Haze: 92, Total light transmittance: 20.22%) Fabric 4 (basis weight: 120 g / m ２ , Haze: 50.77, Total light transmittance: 28.21%) Fabric 5 (basis weight: 400 g / m ２ , Haze: 99.99, Total light transmittance: 0%) Fabric 6 (basis weight: 94 g / m ２ , Haze: 91, Total light transmittance: 2%) Fabric 7 (basis weight: 20 g / m ２ Fabric 8 (white, basis weight: 270 g / m², haze: 92, total light transmittance: 24%)

[0110] The haze and total light transmittance of the substrate were measured as follows: Measurements were made using a haze meter ("NDH-2000" manufactured by Nippon Denshoku Co., Ltd., or an equivalent product) in accordance with JIS K7105.

[0111] The method for measuring the basis weight of the substrate is as follows: A sample of 100 cm x 100 cm was cut out, weighed, and the basis weight (g / m ２ )

[0112] The method for measuring the adhesion amount of the colored portion consisting of the metal portion and the semi-metal portion is as follows. Specifically, a sample before the formation of the colored portion was cut into a piece of 100 cm x 100 cm, and the weight of this piece was measured and used as the basis weight. A sample after the formation of the colored portion was cut into a piece of 100 cm x 100 cm, and the difference between this and the basis weight of the substrate was used as the adhesion amount (μg / cm ２ ) was used. When the colored portion was adhered to the substrate in the order of the metal portion and the semi-metal portion, the substrate, the sample with the metal portion adhered to the substrate, and the sample with the metal portion and the semi-metal portion adhered to the substrate were each cut into a size of 100 cm x 100 cm, and the weights were measured and used as the basis weight. The difference in the basis weight of the substrate, the sample with the metal portion adhered to the substrate, and the sample with the metal portion and the semi-metal portion adhered to the substrate was used as the adhesion amount of the metal portion, the adhesion amount of the semi-metal portion, and the total adhesion amount of the colored portion (μg / cm ２ )

[0113] (2) Measurement and Evaluation (2-1) Measurement of Total Light Transmittance The total light transmittance of the sheet material was measured using a haze meter ("NDH-2000" manufactured by Nippon Denshoku Co., Ltd., or an equivalent product) based on JIS K7105.

[0114] (2-2) Evaluation of Light Transmittance The sheet material was placed in front of a projector equipped with a 200 W UHE lamp at a distance of 10 cm with the design surface facing outward, and if the image projected from the projector light source was visible, it was rated as ◯, and if it was not visible, it was rated as ×.

[0115] (2-3) Evaluation of Concealment Properties In the evaluation test of light transmittance, when the projector behind the sheet material was switched off in an indoor environment, if the projector was visible, it was evaluated as "x", and if it was not visible, it was evaluated as "o".

[0116] (2-4) Evaluation of Colorability The evaluation method for the colorability of the sheet material is as follows: The lightness of reflection (L*) was measured with a spectrophotometer, and L* of 70 or less was evaluated as ○, more than 70 and less than 80 as △, and more than 80 as ×.

[0117] (3) Results The results are shown in Tables 1 to 3.

[0118]

[0119]

[0120]

[0121] 1. Colored part 2. Light-transmitting base material 3. Raised part 4. Adhesive layer 5. Light-transmitting base fabric

Claims

1. A light-transmitting design sheet material comprising a light-transmitting substrate and a colored portion containing a metal element and / or a semi-metal element arranged on at least one surface of the light-transmitting substrate, and having a total light transmittance of 25% or less.

2. The light-transmitting design sheet material according to claim 1, wherein the colored portion is attached to the surface of the light-transmitting substrate.

3. The colored portion has a density of 1 μg / cm with respect to the light-transmitting substrate. ２ 100 μg / cm or more ２ The light-transmitting designable sheet material according to claim 1 or 2, wherein the light-transmitting designable sheet material is attached in the following amount:

4. The light-transmitting design sheet material according to any one of claims 1 to 3, wherein the light-transmitting substrate is a white fabric.

5. The light-transmitting design sheet material according to claim 4, wherein the total light transmittance of the fabric is 0.5% or more and 30% or less.

6. The light-transmitting decorative sheet material according to claim 4 or 5, wherein the haze of the fabric is 80 or more.

7. The light-transmitting design sheet material according to any one of claims 4 to 6, wherein the surface of the fabric is raised, and the colored portion is attached to at least a part of the raised portion.

8. The light-transmitting design sheet material according to any one of claims 1 to 3, wherein the light-transmitting design sheet material is artificial leather and the light-transmitting substrate is a resin sheet.

9. The light-transmitting design sheet material according to claim 8, which comprises a white light-transmitting base fabric, and which is laminated in the order of the light-transmitting base fabric, the colored portion, and the resin sheet.

10. The light-transmitting design sheet material according to claim 9, wherein an adhesive layer is disposed between the light-transmitting base fabric and the colored portion.

11. The light-transmitting decorative sheet material according to any one of claims 1 to 10, wherein the colored portion contains at least one metalloid selected from the group consisting of silicon, germanium, antimony, tellurium, boron, phosphorus, bismuth, and selenium.

12. The light-transmitting decorative sheet material according to any one of claims 1 to 11, wherein the colored portion contains at least one metal selected from the group consisting of silver, aluminum, and titanium.

13. The light-transmitting design sheet material according to any one of claims 1 to 12, wherein the colored portion comprises a metal portion containing a metal and a semi-metal portion containing a semi-metal, and the metal portion and the semi-metal portion are laminated together.

14. The light-transmitting design sheet material according to any one of claims 1 to 13, wherein optical interference occurs due to lamination of the metal part and the semi-metal part.

15. The light-transmitting design sheet material according to any one of claims 1 to 14, wherein the average thickness of the colored portion is 10 nm or more and 500 nm or less.

16. The light-transmitting design sheet material according to any one of claims 1 to 15, wherein the thickness of the light-transmitting substrate is 100 μm or more and 2000 μm or less.

17. The light-transmitting designable sheet material according to any one of claims 1 to 16, wherein the colored portion is attached to the light-transmitting substrate by at least one method selected from the group consisting of sputtering, vacuum deposition, ion plating, chemical vapor deposition, and pulsed laser deposition.

18. A method for producing a light-transmitting design sheet material according to any one of claims 4 to 7, comprising forming a colored portion on one side of a white fabric having a total light transmittance of 10% or more by at least one method selected from the group consisting of sputtering, vacuum deposition, ion plating, chemical vapor deposition, and pulsed laser deposition, to obtain a light-transmitting design sheet material having a total light transmittance of 25% or less.

19. A method for producing a light-transmitting design sheet material according to any one of claims 8 to 10, comprising forming a colored portion on one side of a light-transmitting resin sheet by at least one method selected from the group consisting of sputtering, vacuum deposition, ion plating, chemical vapor deposition, and pulsed laser deposition, and laminating a white light-transmitting base fabric on the colored portion to obtain a light-transmitting design sheet material having a total light transmittance of 25% or less.

20. A projection display material comprising the light-transmitting design sheet material according to claim 1.

21. The projection display material according to claim 20, which comprises a light-transmitting foam or gel material on the surface of the light-transmitting design sheet material.

22. The projection display material according to claim 20, comprising a light-transmitting foam on the surface of the light-transmitting design sheet material, and a printed wiring type heater on said light-transmitting foam.

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