Design sheet material

Abstract

The present invention provides a sheet material and an artificial leather with excellent design properties, including metallic luster and shading. Provided is a design sheet material including a light-transmissive base material and a colored part containing a metallic and / or metalloid element disposed on at least one surface of the light-transmissive base material. When the saturation C* is measured under the condition that light from a light source is incident at an angle of 45 degrees on the surface of the design sheet material on the light-transmissive base material side, with 0 degrees being the angle of specular reflection of said light, the value obtained by subtracting the saturation C* (110 degrees), which is observed at a position 110 degrees on the light source side from said 0 degrees, from the saturation C* (15 degrees), which is observed at a position 15 degrees on the light source side from said 0 degrees, is 10 or greater.

Description

Designable sheet materials

[0001] The present invention relates to a decorative sheet material and the like.

[0002] Artificial leather is used in a variety of products that require design, such as clothing, furniture, interior and exterior decoration, etc. As one means for improving the luxury feel of artificial leather, imparting a metallic luster has been investigated.

[0003] Patent Document 1 discloses a technique for transferring a vapor-deposited foil in the production of a metal thin-film decorated sheet material. The sheet material obtained by this technique has a metallic luster, but has a low sense of shadow and lacks a luxurious feel.

[0004] Patent Document 2 discloses a technique using a pearl pigment. Although the sheet material obtained by this technique can produce a metallic luster, the degree of the luster is low.

[0005] Patent No. 6526993 Patent No. 6191026

[0006] An object of the present invention is to provide a sheet material and artificial leather that have excellent design characteristics including metallic luster and a sense of shadow.

[0007] The present inventors have conducted extensive research in light of the above-mentioned problems, and as a result have discovered a design sheet material comprising a light-transmitting substrate and a colored portion containing a metal element and / or a semi-metal element, the design sheet material having a chroma C ＊ When the angle of specular reflection of the light is set to 0 degrees, the saturation C when observed at a position 15 degrees from the 0 degrees toward the light source is ＊ (15 degrees) from the saturation C when observed at a position 110 degrees from the 0 degrees toward the light source ＊ The inventors have found that the above-mentioned problems can be solved by using a decorative sheet material in which the value obtained by subtracting the angle (110 degrees) from the angle (110 degrees) is 10 or more. Based on this finding, the inventors have conducted further research and have completed the present invention. That is, the present invention includes the following aspects.

[0008] Item 1. A 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, wherein the design sheet material has a chroma C under the condition that the light incident angle of a light source to the light-transmitting substrate side surface is 45 degrees. ＊ When the angle of specular reflection of the light is set to 0 degrees, the saturation C when observed at a position 15 degrees from the 0 degrees toward the light source is ＊ (15 degrees) from the saturation C when observed at a position 110 degrees from the 0 degrees toward the light source ＊ (110 degrees) is 10 or more.

[0009] Item 2. The decorative sheet material according to Item 1, wherein the light-transmitting substrate is a polyurethane resin sheet.

[0010] Item 3. The decorative sheet material according to Item 1 or 2, wherein the light-transmitting substrate has a total light transmittance of 60% or more.

[0011] Item 4. The decorative sheet material according to any one of Items 1 to 3, wherein the haze of the light-transmitting substrate is 2 or more.

[0012] Item 5. The colored portion has a density of 1 μg / cm 2 with respect to the light-transmitting substrate. ２ More than 200μg / cm ２ Item 5. The decorative sheet material according to any one of items 1 to 4, wherein the adhesive is attached in the following amount:

[0013] Item 6. The decorative sheet material according to any one of Items 1 to 5, wherein the colored portion contains at least one metalloid selected from the group consisting of silicon, germanium, antimony, tellurium, boron, phosphorus, bismuth, and selenium.

[0014] Item 7. The decorative sheet material according to any one of Items 1 to 6, wherein the colored portion contains at least one metal selected from the group consisting of silver, aluminum, titanium, copper, chromium, and nickel.

[0015] Item 8. The decorative sheet material according to any one of Items 1 to 7, wherein the colored portion includes a metal portion containing a metal and a semi-metal portion containing a semi-metal, and is colored by optical interference due to lamination of the metal portion and the semi-metal portion.

[0016] Item 9. The decorative sheet material according to any one of items 1 to 8, wherein the colored portion is a sputtering layer.

[0017] Item 10. The decorative sheet material according to any one of items 1 to 9, wherein the colored portion has a thickness of 1 nm or more and 500 nm or less.

[0018] Item 11. The decorative sheet material according to any one of Items 1 to 10, 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.

[0019] Item 12. The decorative sheet material according to any one of Items 1 to 11, wherein the light-transmitting substrate is disposed on the outermost surface, and the light-transmitting substrate, a semi-metallic portion containing a semi-metal, and a metal portion containing a metal are disposed in this order.

[0020] Item 13. Artificial leather comprising the decorative sheet material according to any one of items 1 to 12.

[0021] Item 14. The artificial leather according to Item 13, wherein a base fabric is disposed on the colored portion side of the decorative sheet material according to any one of Items 1 to 12, either directly or via another layer.

[0022] According to the present disclosure, it is possible to provide a sheet material and artificial leather that have excellent design characteristics including metallic luster and a sense of shadow.

[0023] 1 shows a schematic diagram of one embodiment of a sheet material of the present disclosure. 2 shows a schematic diagram of one embodiment of artificial leather of the present disclosure.

[0024] In this specification, the expressions "contain" and "comprise" include the concepts of "contain," "comprise," "consist essentially of," and "consist only of."

[0025] In one aspect, the present disclosure provides a design sheet material, comprising a light-transmitting substrate and a colored portion containing a metal element and / or a semi-metal element, the colored portion being disposed on at least one surface of the light-transmitting substrate, and the design sheet material having a chroma C＊ When the angle of specular reflection of the light is set to 0 degrees, the saturation C when observed at a position 15 degrees from the 0 degrees toward the light source is ＊ (15 degrees) from the saturation C when observed at a position 110 degrees from the 0 degrees toward the light source ＊ (110 degrees) is 10 or more.

[0026] A schematic diagram of one embodiment of the sheet material of the present disclosure is shown in FIG.

[0027] The light-transmitting substrate is not particularly limited as long as it is in a sheet form and has light transmittance to such an extent that the color of the layer on the opposite side can be seen through the substrate. Examples of the light-transmitting substrate include a resin sheet.

[0028] 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.

[0029] 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 disclosure 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.

[0030] 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.

[0031] The light-transmitting substrate is preferably a polyurethane resin sheet, from the viewpoint that it is more suitable for use in artificial leather.

[0032] From the viewpoint of design, the light-transmitting substrate preferably imitates the surface shape of fabric, leather, etc. Examples of the resin sheet include resin sheets (e.g., embossed sheets, raised sheets, etc.) having on their surface irregularities or structures that are the same as or similar to the irregularities or structures of the surface of fabric, leather, etc.

[0033] From the viewpoint of visibility of the color of the layer on the opposite side of the light-transmitting substrate, the total light transmittance of the light-transmitting substrate is preferably 60% or more, more preferably 70% or more, even more preferably 80% or more, and still more preferably 90% or more. The upper limit of the total light transmittance is not particularly limited, and is, for example, 100%, 99%, or 98%.

[0034] From the viewpoint of color saturation, the haze of the light-transmitting substrate is preferably 99 or less, more preferably 90 or less, even more preferably 80 or less, and still more preferably 70 or less. From the viewpoint of design, the haze of the light-transmitting substrate is preferably 2 or more, more preferably 5 or more, even more preferably 10 or more, and still more preferably 20 or more.

[0035] The total light transmittance and haze of the light-transmitting substrate can be measured using a haze meter ("NDH-2000" manufactured by Nippon Denshoku Co., Ltd., or an equivalent product) in accordance with JIS K7136.

[0036] The thickness of the light-transmitting substrate 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.

[0037] 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.

[0038] 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.

[0039] Examples of metal elements include silver, aluminum, titanium, chromium, copper, etc. Among these, from the viewpoint of color tone adjustment, silver, aluminum, titanium, copper, chromium, nickel, etc. are preferred, and aluminum is particularly preferred.

[0040] The metal elements may be one type alone or a combination of two or more types.

[0041] 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.

[0042] The metalloid elements may be one type alone or a combination of two or more types.

[0043] Examples of metals contained in the metal element / metalloid element material include silver, aluminum, titanium, copper, chromium, nickel, etc. Among these, from the viewpoints of durability and design, silver, aluminum, titanium, etc. are preferred, and aluminum is particularly preferred.

[0044] The metal may be one kind alone or a combination of two or more kinds.

[0045] 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.

[0046] The metalloids may be one type alone or two or more types in combination.

[0047] The metal compound is not particularly limited, but examples thereof include oxides, nitrides, sulfides, etc. Among these, oxides are preferred.

[0048] From the viewpoints of metallic luster, shading, colorability, and the like, the average thickness of the colored portion is preferably 1 nm or more and 500 nm or less, more preferably 10 nm or more and 500 nm or less, even more preferably 10 nm or more and 200 nm or less, still more preferably 10 nm or more and 100 nm or less, and particularly preferably 10 nm or more and 70 nm or less.

[0049] The method for measuring the average thickness of the colored portion is as follows. Specifically, analysis is performed using a scanning X-ray fluorescence analyzer (e.g., a Rigaku Corporation 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 rays 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 pre-created calibration curve. The same sample is analyzed five times, and the average value is taken as the thickness. The method for measuring the average thickness of the colored portion from the sheet material of the present disclosure is as follows. Using a JEOL JEM-2010FEF transmission electron microscope, STEM-HAADF observation and photography of the cross section of the decorative sheet material is performed at an acceleration voltage of 200 kV, and the thickness of the colored portion is measured from the electron microscope photograph.

[0050] 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.

[0051] 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 viewpoints of metallic luster, shadow effect, coloring properties, etc., 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 1 μg / cm ２ More than 200μg / cm ２ More preferably, 2 μg / cm ２ 100 μg / cm or more ２ More preferably, 4 μg / cm ２ 40 μg / cm or more ２Below, particularly more preferably 6 μg / cm ２ 20 μg / cm or more ２ Below 8 μg / cm is particularly preferable ２ More than 17μg / cm ２ It is preferable that the coating amount is as follows:

[0052] The following method can be used to measure the amount of adhesion of the colored portion. Specifically, a sample before the formation of the colored portion is cut into a piece of 100 cm x 100 cm, and the weight 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 adhesion amount (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 ) As an alternative to the above measurement method, the following method can also be employed. Analysis is performed using a scanning X-ray fluorescence analyzer (for example, 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 rays 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 deposition amount using a calibration curve created in advance. The same sample is analyzed five times, and the average value is taken as the deposition amount.

[0053] 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.

[0054] The colored portion preferably includes a metal portion containing a metal and a semi-metal portion containing a metalloid. In this case, the colored portion containing the metal portion and the semi-metal portion is laminated on the light-transmitting substrate. More specifically, for example, a layer consisting of the colored portion is disposed over the entirety of at least one surface of the light-transmitting substrate (see, for example, FIG. 1). In this embodiment, preferably, a layer consisting of a semi-metal portion is disposed over the entirety of at least one surface of the light-transmitting substrate, and a layer consisting of a metal portion is disposed over the entirety of the surface of the semi-metal layer opposite the light-transmitting substrate. This enables coloring by optical interference due to the lamination of the metal portion and the semi-metal portion. Furthermore, the inclusion of the metal portion allows infrared light to be reflected, thereby improving heat-shielding properties. In this case, it is preferable that the light-transmitting substrate, the semi-metal portion, and the metal portion are laminated in this order. As a result, when a laminate such as artificial leather is obtained by arranging the sheet material of the present disclosure so that the light-transmitting substrate is on the surface side, coloring by optical interference is obtained when viewed from the surface side, and the colored portion is protected by the light-transmitting substrate, resulting in excellent durability.

[0055] 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.

[0056] 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.

[0057] From the viewpoint of metallic luster, shading, etc., the average thickness of the metal part is preferably 1 nm or more and 500 nm or less, more preferably 5 nm or more and 200 nm or less, even more preferably 10 nm or more and 100 nm or less, and even more preferably 20 nm or more and 50 nm or less.

[0058] From the viewpoint of metallic luster, shadow effect, etc., the metal part is preferably 1 μg / cm 3 with respect to the light-transmitting substrate. ２ 300 μg / cm or more ２or less, more preferably 2 μg / cm ２ 100 μg / cm or more ２ More preferably, 3 μg / cm ２ 30 μg / cm or more ２ More preferably, 4 μg / cm ２ 20 μg / cm or more ２ Below 6 μg / cm is particularly preferable ２ 15μg / cm or more ２ It is preferable that the coating amount is as follows:

[0059] From the viewpoints of metallic luster, shading, colorability, and the like, 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, even more preferably 2 nm or more and 100 nm or less, still more preferably 3 nm or more and 60 nm, particularly preferably 4 nm or more and 40 nm or less, and particularly preferably 4 nm or more and 30 nm or less.

[0060] From the viewpoint of metallic luster, shading, colorability, etc., the semi-metallic portion is preferably 0.1 μg / cm 3 with respect to the light-transmitting substrate. ２ More than 200μg / cm ２ or less, more preferably 0.2 μg / cm ２ More than 80μg / cm ２ More preferably, 0.5 μg / cm ２ 30 μg / cm or more ２ More preferably, 1 μg / cm ２ 15μg / cm or more ２ Below, particularly preferably 1.5 μg / cm ２ 10 μg / cm or more ２ Below, particularly preferably 1.5 μg / cm ２ 7 μg / cm or more ２ It is preferable that the coating amount is as follows:

[0061] The sheet material of the present disclosure has a chroma C under the condition that the angle of light incident from the light source to the surface of the sheet material of the present disclosure on the light-transmitting substrate side is 45 degrees. ＊ When the angle of specular reflection of the light is set to 0 degrees, the saturation C when observed at a position 15 degrees from the 0 degrees toward the light source is ＊(15 degrees) from the saturation C when observed at a position 110 degrees from the 0 degrees toward the light source ＊ (110 degrees) is 10 or more.

[0062] The value of the characteristic (saturation C when observed at a position 15 degrees from the 0 degree to the light source side) ＊ (15 degrees) from the saturation C when observed at a position 110 degrees from the 0 degrees toward the light source ＊ The value obtained by subtracting (110 degrees) from the saturation angle (C) is preferably 15 or more, more preferably 20 or more, and even more preferably 25 or more. There is no particular upper limit to this value, and it may be, for example, 35, 40, or 50. ＊ can be adjusted by changing, for example, the type of metal or semi-metal, the film thickness of the metal or semi-metal, the roughness of the substrate, etc. ＊ If a metal material with high reflectivity in the visible light region is used, the saturation can be adjusted to be higher. The thicker the metal film, the higher the saturation can be adjusted.

[0063] This feature, combined with the layer structure described above, allows the film to exhibit excellent design properties including metallic luster and a sense of shadow. Furthermore, the layer structure described above makes it possible to obtain this feature.

[0064] The characteristics are measured and calculated using "BYK-mac i" (trade name, manufactured by BYK-gardner) with a D65 light source, irradiating light from the light-transmitting substrate side.

[0065] The sheet material of the present disclosure can be produced, for example, by a method including a step of forming a colored portion on the surface of a light-transmitting substrate.

[0066] 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. The colored portion is preferably a layer formed by a sputtering method (a sputtering layer).

[0067] 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.

[0068] In one aspect, the present disclosure relates to an artificial leather (artificial leather of the present disclosure) comprising a sheet material of the present disclosure. In this specification, artificial leather is a sheet-like material artificially made to imitate leather, and includes both so-called synthetic leather and artificial leather.

[0069] More specifically, the artificial leather of the present disclosure is an artificial leather in which a base fabric is disposed on the colored portion side of the sheet material of the present disclosure, either directly or via another layer (e.g., an adhesive layer containing a pressure-sensitive adhesive such as an acrylic pressure-sensitive adhesive). One embodiment of this is shown in Figure 2.

[0070] The base 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 base fabric may contain components other than fibers and fiber bundles as long as the effects of the present disclosure are not significantly impaired. In this case, the total amount of fibers and fiber bundles in the base 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 base fabrics include woven fabrics (e.g., plain weave, twill weave, satin weave, etc.), knitted fabrics, nonwoven fabrics, etc.

[0071] The fibers constituting the base 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.).

[0072] The artificial leather of the present disclosure can have the same characteristics as the sheet material of the present disclosure. That is, the artificial leather of the present disclosure has a chroma C ＊ When the angle of specular reflection of the light is set to 0 degrees, the saturation C when observed at a position 15 degrees from the 0 degrees toward the light source is ＊ (15 degrees) from the saturation C when observed at a position 110 degrees from the 0 degrees toward the light source ＊ (110 degrees) is 10 or more.

[0073] The uses of the sheet material and artificial leather of the present disclosure are not particularly limited, and they can be used for, for example, interior and exterior applications (e.g., the interior and exterior applications (particularly the interior) of vehicles such as automobiles), clothing and accessories, furniture, toys, stationery, shoes, etc.

[0074] The present disclosure will be described in detail below based on examples, but the present disclosure is not limited to these examples.

[0075] (1) Production of Sheet Material (Example 1) A polyurethane film (thickness: 30 μm, total light transmittance: 95.94%, haze: 76) serving as a 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 semi-metallic portion made of silicon (Si) (adhesion amount 2.0 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 9.14 μg / cm ２ ) was attached.

[0076] Examples 2 to 5 Sheet materials were obtained in the same manner as in Example 1, except that the deposition amounts of the metal portion and the semi-metal portion were as shown in Table 1.

[0077] (Example 6) A sheet material was obtained in the same manner as in Example 1, except that a polyurethane film (thickness: 25 μm, total light transmittance: 90.49%, haze: 19) was used as the substrate and the adhesion amounts of the metal part and the semi-metal part were as shown in Table 1.

[0078] Example 7 A polyurethane film (thickness: 30 μm, total light transmittance: 95.94%, haze: 76) serving as a substrate was placed in a vacuum chamber, 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 4.5 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 titanium (Ti) (attachment amount 15 μg / cm ２ ) was attached.

[0079] Example 8 A polyurethane film (thickness: 30 μm, total light transmittance: 95.94%, haze: 76) serving as a substrate was placed in a vacuum chamber, 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 9.7 μg / cm ) was deposited on the surface of the substrate by DC magnetron sputtering. ２ ) was attached.

[0080] Example 9 A sheet material was obtained in the same manner as in Example 7, except that the amount of the semi-metallic portion attached was set as shown in Table 1.

[0081] (Example 10) A sheet material was obtained in the same manner as in Example 1, except that a polyurethane film (thickness: 30 μm, total light transmittance: 70%, haze: 10) was used as the substrate and the adhesion amounts of the metal parts and semi-metal parts were as shown in Table 1.

[0082] (Example 11) A sheet material was obtained in the same manner as in Example 1, except that a polyurethane film (thickness: 30 μm, total light transmittance: 85%, haze: 5) was used as the substrate and the adhesion amounts of the metal part and the semi-metal part were as shown in Table 1.

[0083] (Example 12) A sheet material was obtained in the same manner as in Example 1, except that a polyvinyl chloride film (thickness: 30 μm, total light transmittance: 95.94%, haze: 76) was used as the substrate and the adhesion amounts of the metal part and the semi-metal part were as shown in Table 1.

[0084] Comparative Example 1 A sheet material in which a pearl pigment was added to a urethane film was used.

[0085] Comparative Example 2 A sheet material was used in which a 5μ gold foil transfer film was attached to a urethane film.

[0086] The haze and total light transmittance of the substrate were measured using a haze meter (manufactured by Nippon Denshoku Co., Ltd., model NDH-2000) in accordance with JIS K7105.

[0087] 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 )

[0088] The average thickness of the colored portion was measured as follows. Specifically, analysis was 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 was measured, and the intensity at the background position as well as the peak position was measured so that the net intensity could be calculated. The measured intensity value could be converted to thickness using a calibration curve created in advance. The same sample was analyzed five times, and the average value was taken as the thickness.

[0089] (2) Measurement and Evaluation (2-1) Color Evaluation The colors of the sheet materials of Example and Comparative Example 1 were visually evaluated from the polyurethane film side. The color of the sheet material of Comparative Example 2 was visually evaluated from the foil side.

[0090] (2-2) Measurement of Chroma The chroma C was measured under the condition that the incident angle of light from the light source to the polyurethane film side surface of the sheet material of the Examples and Comparative Examples was 45 degrees. ＊ When the angle of specular reflection of the light is set to 0 degrees, the saturation C when observed from a position of 15 degrees toward the light source is ＊ (15 degrees), and saturation C when observed from a position of 110 degrees toward the light source ＊ The angle (110 degrees) was measured. The specific measurement method is as follows. Calculation was performed using "BYK-mac i" (trade name, manufactured by BYK-gardner). A D65 light source was used. Light was irradiated from the polyurethane film side.

[0091] (2-3) Evaluation of Design The sheet materials of the examples and comparative examples were visually observed from the polyurethane film side, and evaluated for design, including metallic luster and shading, according to the following evaluation criteria.

[0092] The evaluation was carried out visually from a position 40 cm away in a direction perpendicular to the sample surface and from a position 40 cm away in a direction tilted by 60 degrees. Three evaluators evaluated the sample according to the following criteria.

[0093] <Evaluation criteria> ◎: 3 out of 3 people notice a difference in saturation depending on the viewing angle. ○: 2 out of 3 people notice a difference in saturation depending on the viewing angle. ×: 0 to 1 out of 3 people notice a difference in saturation depending on the viewing angle.

[0094] (3) Results The results are shown in Table 1.

[0095]

[0096] Furthermore, a laminate was produced by bonding a polyester base fabric to the metal part via a polyurethane adhesive for each of the sheet materials of Examples 1 to 6. The color, saturation, and design of the laminate were measured and evaluated, and the results were the same as those in Table 1.

[0097] 1 Colored part 2 Light-transmitting base material 3 Adhesive layer 4 Base fabric

Claims

1. A 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 chroma C under the condition that the light incident angle of a light source to the surface of the light-transmitting substrate side of the design sheet material is 45 degrees. ＊ When the angle of specular reflection of the light is set to 0 degrees, the saturation C when observed at a position 15 degrees from the 0 degrees toward the light source is ＊ (15 degrees) from the saturation C when observed at a position 110 degrees from the 0 degrees toward the light source ＊ (110 degrees) is 10 or more.

2. The decorative sheet material according to claim 1, wherein the light-transmitting substrate is a polyurethane resin sheet.

3. The decorative sheet material according to claim 1 or 2, wherein the total light transmittance of the light-transmitting substrate is 60% or more.

4. The decorative sheet material according to any one of claims 1 to 3, wherein the haze of the light-transmitting substrate is 2 or more.

5. The colored portion has a density of 1 μg / cm relative to the light-transmitting substrate. ２ More than 200μg / cm ２ The decorative sheet material according to any one of claims 1 to 4, wherein the decorative sheet material is attached in the following amount:

6. The decorative sheet material according to any one of claims 1 to 5, wherein the colored portion contains at least one metalloid selected from the group consisting of silicon, germanium, antimony, tellurium, boron, phosphorus, bismuth, and selenium.

7. The decorative sheet material according to any one of claims 1 to 6, wherein the colored portion contains at least one metal selected from the group consisting of silver, aluminum, titanium, copper, chromium, and nickel.

8. The decorative sheet material according to any one of claims 1 to 7, wherein the colored portion comprises a metal portion containing a metal and a semi-metal portion containing a semi-metal, and is colored by optical interference due to lamination of the metal portion and the semi-metal portion.

9. The decorative sheet material according to any one of claims 1 to 8, wherein the colored portion is a sputtering layer.

10. The decorative sheet material according to any one of claims 1 to 9, wherein the thickness of the colored portion is 1 nm or more and 500 nm or less.

11. The decorative sheet material according to any one of claims 1 to 10, 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.

12. A designable sheet material according to any one of claims 1 to 11, in which the light-transmitting substrate is disposed on the outermost surface, and the light-transmitting substrate, a semi-metallic portion containing a semi-metal, and a metallic portion containing a metal are disposed in this order.

13. Artificial leather comprising the decorative sheet material according to any one of claims 1 to 12.

14. The artificial leather according to claim 11, in which a base fabric is placed on the colored portion side of the decorative sheet material according to any one of claims 1 to 12, either directly or via another layer.

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