Fiber Sheet

Abstract

To provide a technique for coloring a fiber substrate which can give the fiber substrate a metallic luster and superior wear resistance.SOLUTION: A fiber sheet has a fabric substrate and a layer containing a metal element or metalloid element. A height difference between a bundle of warp and a bundle of weft adjacent to each other is 7-20 μm,.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a fiber sheet and the like. [Background technology]

[0002] Fiber substrates are used in various fields where design is required. For example, carbon fiber substrates, together with resins, form composite materials (such as carbon fiber reinforced plastics) and are widely used in a wide range of applications, from relatively large items such as aircraft bodies to relatively small, everyday items such as sports equipment, interior and exterior materials for cars, and clothing. For this reason, fiber substrates are sometimes colored to enhance their design. In addition, in this case, due to their unique design, glossiness may be imparted to the substrate.

[0003] Conventionally, the coloring of these substrates has generally been carried out by applying a paint containing a dye, pigment, or the like (Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-229587 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the course of research, the inventors discovered that by disposing a layer containing a metal element or a metalloid element on a substrate, it is possible to impart a metallic luster while coloring the substrate, thereby improving the design. However, in the course of further research, they discovered that when this coloring technology is applied to a fiber substrate, the layer containing a metal element or a metalloid element is easily worn off.

[0006] An object of the present invention is to provide a coloring technique for a fiber substrate that can impart metallic luster and has excellent abrasion resistance. [Means for solving the problem]

[0007] The present inventors have conducted intensive research in view of the above problems, and have found that the above problems can be solved by a fiber sheet having a woven substrate and a metal element or semi-metal element-containing layer, and in which the height difference between adjacent warp fiber bundles and weft fiber bundles is 7 to 20 μm. The present inventors have conducted further research based on these findings, and have completed the present invention. That is, the present invention includes the following aspects.

[0008] Item 1. A fiber sheet having a woven substrate and a layer containing a metal element or a semi-metal element, in which the height difference between adjacent warp fiber bundles and weft fiber bundles is 7 to 20 μm. Item 2. The fiber sheet according to item 1, wherein the area of ​​the higher fiber bundle is larger than the area of ​​the lower fiber bundle in the adjacent warp fiber bundle and weft fiber bundle. Item 3. The fiber sheet according to item 2, wherein the area of ​​the higher fiber bundle is 1.5 to 2.1 times the area of ​​the lower fiber bundle. Item 4. The fiber sheet according to any one of Items 1 to 3, wherein the metal element or metalloid element-containing layer includes a metal layer and a metalloid layer, and the textile substrate, the metal layer, and the metalloid layer are arranged in this order. Item 5. A textile product comprising the fiber sheet according to any one of claims 1 to 4. Item 6. A composite material comprising the fiber sheet according to any one of claims 1 to 4 and a resin. Effect of the Invention

[0009] According to the present invention, it is possible to provide a fiber sheet having metallic luster and excellent abrasion resistance. [Brief description of the drawings]

[0010] [Figure 1] 1 is a photographic image showing an example of the surface of the metal element or metalloid element-containing layer side of the fiber sheet of the present invention. A indicates an area composed of warp fiber bundles and separated by other surrounding fiber bundles. B indicates an area composed of weft fiber bundles and separated by other surrounding fiber bundles. H indicates the height difference between area A and area B. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] In this specification, the expressions "contain" and "comprise" include the concepts of "contain", "include", "consist essentially of" and "consist only of".

[0012] 1. Fiber sheet In one aspect, the present invention relates to a fiber sheet (sometimes referred to as the "fiber sheet of the present invention" in this specification) having a woven fabric substrate and a metal element or semi-metal element-containing layer, in which the height difference between adjacent warp fiber bundles and weft fiber bundles is 7 to 20 μm. This will be described below.

[0013] <1-1. Textile base material> The woven fabric substrate is not particularly limited as long as it is a woven fabric containing fibers as a material and is in a sheet form. The woven fabric substrate may contain components other than fibers as long as the effects of the present invention are not significantly impaired. In this case, the total amount of fibers in the woven fabric substrate 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.

[0014] The woven fabric is not particularly limited, and examples thereof include plain weave, twill weave, satin weave, satin weave, NCF (Non-Crimp Fabrics), multi-layer weave (e.g., horizontal double weave, triple weave, angle interlock weave, etc.), multi-layer weave, multi-axial weave (e.g., triaxial weave, quadriaxial weave, orthogonal interlock weave, etc.). Among these, from the viewpoint of the abrasion resistance of the fiber sheet of the present invention, plain weave and the like are preferable. The woven fabric may be one that has been subjected to a sile treatment or a calendar treatment. By adopting fibers with higher smoothness for use in the woven fabric, the metallic feel of the fiber sheet of the present invention can be further enhanced.

[0015] The layer structure of the textile substrate is not particularly limited. The textile substrate may be made of a single type of textile, or may be made of a combination of two or more types of textile.

[0016] The fibers constituting the woven fabric substrate are not particularly limited, and examples thereof include organic fibers such as 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.); A wide variety of inorganic fibers can be used, including carbon fibers (e.g., PAN-based carbon fibers, pitch-based carbon fibers, carbon nanotubes, etc.), glass fibers (e.g., glass wool, glass fibers, etc.), mineral fibers (e.g., chrysotile asbestos, white asbestos, blue asbestos, brown asbestos, ectoparasite asbestos, and exothermic asbestos), artificial mineral fibers (e.g., rock wool, ceramic fibers, etc.), and metal fibers (e.g., stainless steel fibers, aluminum fibers, iron fibers, nickel fibers, copper fibers, etc.).

[0017] The form of the fibers may be any of continuous long fibers, short fibers obtained by cutting continuous long fibers, milled yarn obtained by pulverizing into a powder, and the like.

[0018] The fibers may be of one type alone or of two or more types in combination.

[0019] The woven fabric base material includes warp fiber bundles and weft fiber bundles. The fiber bundles are not particularly limited as long as they are made of a plurality of fibers. The number of fibers constituting the fiber bundles is, for example, 1 or more, 5 or more, 10 or more, or 15 or more, while it is, for example, 500 or less, 200 or less, 100 or less, or 50 or less, from the viewpoint of easily adjusting the height difference between the fiber bundles in the woven fabric base material to a suitable range. These upper and lower limit values ​​can be arbitrarily combined.

[0020] From the viewpoint of easily adjusting the height difference between the fiber bundles in the woven substrate within a suitable range, the filament diameter of the fibers constituting the fiber bundle is, for example, 10 nm or more, 500 nm or more, 1 μm or more, or 5 μm or more, and, for example, 500 μm or less, 100 μm or less, 50 μm or less, or 20 μm or less. These upper and lower limit values ​​can be arbitrarily combined.

[0021] The thickness of the woven fabric substrate may vary depending on the type of fiber, and is not particularly limited. The thickness of the woven fabric substrate is, for example, 5 μm or more, 10 μm or more, 20 μm or more, or 50 μm or more, while it is, for example, 500 μm or less, 300 μm or less, 100 μm or less, or 80 μm or less, from the viewpoint of easily adjusting the height difference between the fiber bundles in the woven fabric substrate to a suitable range. These upper and lower limit values ​​can be arbitrarily combined.

[0022] The fibers, fiber bundles, and woven substrates may have a known finishing agent attached thereto, such as a flame retardant, a water absorbent, a water repellent, a softener, a heat storage agent, an ultraviolet ray shielding agent, an antistatic agent, an antibacterial agent, a deodorant, an insect repellent, a mosquito repellent, a phosphorescent agent, a retroreflective agent, or a bundling agent.

[0023] <1-2. Layer containing metal element or semi-metal element> The metal or metalloid element containing layer is a layer that is disposed on the textile substrate, preferably on the surface of the textile substrate.

[0024] The metal element or metalloid element-containing layer is not particularly limited as long as it is a layer containing a metal element or a metalloid element as a material. The metal element or metalloid element-containing layer may contain components other than metal elements or metalloid elements as long as the effect of the present invention is not significantly impaired. In this case, the content of the metal element or metalloid element in the metal element or metalloid element-containing layer is, for example, 30 mass% or more, preferably 50 mass% or more, more preferably 75 mass% or more, even more preferably 80 mass% or more, even more preferably 90 mass% or more, particularly preferably 95 mass% or more, very preferably 99 mass% or more, and usually less than 100 mass%.

[0025] The metal element and metalloid element constituting the metal element or metalloid element-containing layer are not particularly limited, and examples thereof include aluminum, copper, iron, silver, gold, platinum, chromium, nickel, molybdenum, titanium, silicon, germanium, gallium, etc. Among these, from the viewpoints of metallic luster, color saturation and brightness, and durability such as resistance to discoloration, etc., preferred are aluminum, copper, silver, gold, platinum, titanium, silicon, etc., and more preferred are aluminum, titanium, silicon, etc.

[0026] The metal elements and metalloid elements may be of one type alone or of a combination of two or more types.

[0027] The thickness of the metal element or metalloid element-containing layer is not particularly limited and is, for example, 1 to 200 nm. From the viewpoint of increasing the lightness and saturation of the color, the thickness is preferably 3 to 150 nm, and more preferably 5 to 100 nm.

[0028] The layer structure of the metal element or metalloid element-containing layer is not particularly limited. The metal element or metalloid element-containing layer may be a single layer or may be a plurality of layers having the same or different compositions.

[0029] At least one layer of the metal element or metalloid element-containing layer is preferably a metal layer. At least one layer of the metal element or metalloid element-containing layer is preferably a color tone adjusting layer (preferably a metalloid layer). In a preferred embodiment of the present invention, the fiber sheet of the present invention has a metal element or metalloid element-containing layer that includes a metal layer and a metalloid layer, and the textile substrate, the metal layer, and the metalloid layer are arranged in this order. In this embodiment, in a preferred embodiment of the present invention, the metal element or metalloid element-containing layer includes a metalloid or metalloid oxide layer, a metal layer, and a metalloid layer, and the textile substrate, the metalloid or metalloid oxide layer, the metal layer, and the metalloid layer are arranged in this order. These will be described below.

[0030] <1-2-1. Metal layer> The metal layer is disposed on the textile substrate, in other words, on at least one of the two main surfaces of the textile substrate. The metal layer can improve the gloss, color fastness, color vividness, etc. The metal layer can adjust the brightness of the color mainly by optical interference or light reflection. Another layer may be provided between the metal layer and the textile substrate.

[0031] The metal layer is not particularly limited as long as it is a layer containing metal as a material. The metal layer may contain components other than metal. In this case, the amount of metal in the metal layer is, for example, 80 mass% or more, preferably 90 mass% or more, more preferably 95 mass% or more, and even more preferably 99 mass% or more, and is usually less than 100 mass%.

[0032] The metal constituting the metal layer is not particularly limited, and examples thereof include aluminum, copper, iron, silver, gold, platinum, chromium, nickel, molybdenum, titanium, gallium, etc. Among these, from the viewpoints of metallic luster, color saturation and brightness, and durability such as resistance to discoloration, etc., preferred are aluminum, copper, silver, gold, platinum, titanium, etc., and more preferred are aluminum, titanium, etc.

[0033] The metal may be one type alone or two or more types in combination.

[0034] The thickness of the metal layer is not particularly limited and is, for example, 1 to 200 nm. From the viewpoint of increasing the metallic luster, color brightness, and saturation, the thickness is preferably 20 to 200 nm, and more preferably 40 to 200 nm.

[0035] The layer structure of the metal layer is not particularly limited. The metal layer may be a single layer or a plurality of layers having the same or different compositions. In addition, the metal layer may have a coating such as an oxide coating on one or both of its two main surfaces.

[0036] <1-2-2. Color tone adjustment layer> The color-adjusting layer is usually disposed on the metal layer, i.e., on the surface of the metal layer opposite the textile substrate, and other layers may be provided between the color-adjusting layer and the metal layer.

[0037] The color tone adjusting layer is preferably a layer containing a metal element or a metalloid element as a material. The color tone adjusting layer may contain components other than the metal element and the metalloid element. In this case, the content of the metal element and the metalloid element in the color tone adjusting layer is, for example, 30% by mass or more, preferably 50% by mass or more, more preferably 75% 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, very preferably 99% by mass or more, and usually less than 100% by mass.

[0038] The metal and / or metalloid constituting the color tone adjusting layer is not particularly limited, and examples thereof include aluminum, copper, iron, silver, gold, platinum, chromium, nickel, molybdenum, titanium, silicon, germanium, gallium, etc. Among these, from the viewpoint of increasing the lightness and saturation of the color, silicon, germanium, etc. are preferable, and silicon is more preferable.

[0039] The metal elements and metalloid elements may be of one type alone or of a combination of two or more types.

[0040] The color tone adjusting layer may be made of a metal, semi-metal, or alloy made of a metallic element or a semi-metal element, or may be made of a compound containing a metallic element or a semi-metal element, or may be made of a mixture of these. Examples of compounds containing a metallic element or a semi-metal element include oxides, nitrides, and oxynitrides.

[0041] The oxide may be, for example, a compound represented by MOX, where X is a number satisfying the formula: n / 100≦X≦n / 2 (n is the valence of the metalloid), and M is a metal element or a metalloid element.

[0042] The nitride may be, for example, a compound represented by MNy, where Y is a number satisfying the formula: n / 100≦Y≦n / 3 (n is the valence of the metalloid), and M is a metal element or a metalloid element.

[0043] The nitride oxide may be, for example, a compound represented by MOXNy (wherein X and Y satisfy n / 100≦X, n / 100≦Y, and X+Y≦n / 2 (n is the valence of a metal or metalloid), and M is a metal element or a metalloid element).

[0044] Regarding the oxidation number X of the oxide or nitride oxide, for example, a cross section of a layer containing MOx or MOxNy is subjected to elemental analysis by FE-TEM-EDX (for example, "JEM-ARM200F" manufactured by JEOL Ltd.), and X is calculated from the element ratio of M to O per area of ​​the cross section of the layer containing MOx or MOxNy, whereby the valence of the oxygen atom can be calculated.

[0045] Regarding the nitrogen number Y of the above-mentioned nitride or nitride oxide, for example, a cross section of a layer containing MNy or MOxNy is subjected to elemental analysis by FE-TEM-EDX (for example, "JEM-ARM200F" manufactured by JEOL Ltd.), and Y is calculated from the element ratio of M to N per area of ​​the cross section of the layer containing MNy or MOxNy, whereby the valence of the nitrogen atom can be calculated.

[0046] The color tone adjusting layer preferably has a layer containing MOx or MNy (in the case of MOx, M represents a metal or metalloid having a valence of n, and X represents a number of 0 or more and less than n / 2. In the case of MNy, M represents a metal or metalloid having a valence of n, and Y represents a number of 0 or more and less than n / 3). In this case, M is preferably titanium, silicon, or germanium. x in MOx and x in MNx may each be 0 or may exceed 0. When x is 0, the layer containing MOx represents a layer containing a metal or metalloid simple substance. When x is 0, the layer containing MNx represents a layer containing a metal or metalloid simple substance. When x is more than 0, the layer containing MOx represents a layer containing an oxide of a metal or metalloid. When x is more than 0, the layer containing MNx represents a layer containing a nitride of a metal or metalloid. x in MOx is preferably n / 4 or less, more preferably n / 8 or less, and even more preferably n / 16 or less. When M in MOx is silicon, x preferably represents a number less than 1, more preferably a number less than 0.5. When M in MNx is silicon, x preferably represents a number equal to or less than 4 / 3.

[0047] The color tone adjustment layer may be a layer containing both MOx and MNx. In this case, M in MOx and MNx may be the same metal or semimetal, or different metals or semimetals. Also, x in MOx and MNx may be the same number, or different numbers.

[0048] The color tone adjusting layer preferably contains a metalloid element, and more preferably is a metalloid layer containing a metalloid as a main component (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). Examples of metalloid elements include silicon, germanium, antimony, tellurium, boron, arsenic, bismuth, and selenium.

[0049] The color tone adjusting layer preferably contains indium oxide or indium tin oxide (hereinafter referred to as ITO). The content of ITO in the color tone adjusting layer is, for example, 50% by mass or more, preferably 70% by mass or more, more preferably 90% by mass or more, and even more preferably 95% by mass or more, and is usually less than 100% by mass.

[0050] The thickness of the color tone adjusting layer is not particularly limited, but is, for example, 3 to 200 nm. From the viewpoint of color saturation and brightness, the thickness is preferably 3 to 50 nm, and more preferably 3 to 30 nm.

[0051] The layer structure of the color tone adjusting layer is not particularly limited. The color tone adjusting layer may be a single layer or may be a plurality of layers having the same or different compositions. The color tone adjusting layer may have a surface formed of a film such as an oxide film on one or both of its two main surfaces.

[0052] <1-3. Oxide layer> The fiber sheet of the present invention preferably has an oxide layer. More preferably, the oxide layer is disposed on the surface of the metal layer or the color-adjusting layer opposite to the textile substrate. The oxide layer can further improve durability such as discoloration resistance.

[0053] The oxide layer is not particularly limited as long as it is a layer containing a metal or semimetal oxide as a material. The oxide layer may contain components other than the oxide as long as the effect of the present invention is not significantly impaired. In this case, the amount of the oxide in the oxide layer is, for example, 80 mass% or more, preferably 90 mass% or more, more preferably 95 mass% or more, and even more preferably 99 mass% or more, and is usually less than 100 mass%.

[0054] The metalloid oxide constituting the oxide layer is not particularly limited, and examples thereof include oxides of metalloids (preferably silicon) such as silicon, germanium, antimony, bismuth, tellurium, boron, arsenic, and selenium. More specifically, examples of metalloid oxides include oxides of AO, X[wherein X is a number satisfying the formula: n / 2.5≦X≦n / 2 (n is the valence of the metalloid), and A is a metalloid selected from the group consisting of silicon, germanium, antimony, bismuth, tellurium, boron, arsenic, and selenium.]. When A in the above formula is a metalloid element, from the viewpoint of favorably adjusting the color tone of the fiber sheet, A is preferably silicon, and the metalloid oxide is more preferably SiO2. The metalloid oxide may be one type alone or two or more types in combination.

[0055] The metal oxide constituting the oxide layer is not particularly limited, and examples thereof include oxides of metals such as titanium, zinc, aluminum, niobium, cobalt, and nickel (preferably titanium, zinc, and aluminum). More specifically, examples of the metal oxide include oxides of AO X [wherein X is a number satisfying the formula: n / 2.5≦X≦n / 2 (n is the valence of the metal), and A is a metal selected from the group consisting of titanium, aluminum, niobium, cobalt, and nickel.] When A in the above formula is a metal element, from the viewpoint of favorably adjusting the color tone of the fiber sheet, A is preferably titanium and aluminum, and the metal oxide is more preferably TiO2, ZnO, and Al2O5. The metal oxide may be a single type or a combination of two or more types.

[0056] From the viewpoint of durability such as discoloration resistance, transparency, and easy adjustment of color, X in the above formula is preferably n / 2.4 or more and n / 2 or less, more preferably n / 2.3 or more and n / 2 or less, even more preferably n / 2.2 or more and n / 2 or less, and particularly preferably n / 2.1 or more and n / 2 or less.

[0057] The thickness of the oxide layer is not particularly limited and is, for example, 1 to 50 nm. From the viewpoint of simultaneously achieving improved durability such as discoloration resistance and transparency, and easy color adjustment, the thickness is preferably 2 to 20 nm, more preferably 3 to 10 nm.

[0058] The layer structure of the oxide layer is not particularly limited. The oxide layer may be a single layer or may be a plurality of layers having the same or different compositions.

[0059] <1-4. Height difference between fiber bundles, area of ​​fiber bundle> The fiber sheet of the present invention has a characteristic that the difference in height between adjacent warp fiber bundles and weft fiber bundles is 7 to 20 μm. This characteristic allows the fiber sheet to exhibit good abrasion resistance. More specifically, the difference in height is the difference in height (H) between a region (region A) composed of warp fiber bundles of the woven substrate and separated by other surrounding fiber bundles, and a region (region B) composed of weft fiber bundles and separated by other surrounding fiber bundles, on the surface of the metal element or semi-metal element-containing layer side of the fiber sheet of the present invention (see FIG. 1).

[0060] From the viewpoint of wear resistance, the height difference between the fiber bundles is preferably 7 to 20 μm, more preferably 7 to 18 μm, and even more preferably 9 to 17 μm. The reason why wear resistance is improved by having a height difference between the fiber bundles of 7 μm or more is not limited to a specific reason, but is considered to be that the height difference between the fiber bundles allows the force to be appropriately dispersed when friction occurs, and the degree of contact with the object of friction is suppressed. The reason why wear resistance is improved by having a height difference between the fiber bundles of 17 μm or less is not limited to a specific reason, but is considered to be that the height difference between the fiber bundles is too large, making it easier for thread to return when friction occurs, and the direction of the higher fiber bundles changes, making it appear as if the metal has peeled off.

[0061] The height difference can be calculated as follows: Using a laser microscope (for example, Keyence VK-X1000 or an equivalent), a pair of adjacent regions A and B is observed in the same field of view in five fields of view, the height difference between regions A and B is measured in each field of view, and the height difference (H) is calculated by averaging the values ​​for each field.

[0062] The method for controlling the height difference is not particularly limited, but examples thereof include a method for adjusting the number of fibers constituting the fiber bundle, a method for adjusting the denier number, and a method for adjusting the sile conditions (temperature, pressure, number of calendar treatments, conveying speed, etc.).

[0063] In a preferred embodiment of the present invention, in the adjacent warp fiber bundle and weft fiber bundle, the area of ​​the higher fiber bundle (the area of ​​region A (or region B)) is larger than the area of ​​the lower fiber bundle (the area of ​​region B (or region A)).

[0064] In a more preferred embodiment, the area of ​​the higher fiber bundle is preferably 1.5 to 2.1 times, more preferably 1.6 to 1.9 times, the area of ​​the lower fiber bundle. By making the area of ​​the fiber bundle 1.5 to 2.1 times, the abrasion resistance is improved. Although the reason for the improved abrasion resistance is not limited to a specific reason, it is believed that when friction occurs, the higher fiber bundle moves appropriately, making it easier to disperse the frictional force.

[0065] In a preferred embodiment of the present invention, the area of ​​the higher fiber bundle is preferably 15,000 to 50,000 μm 2 , more preferably 20,000 to 45,000 μm 2 , more preferably 30,000 to 40,000 μm 2 The area of ​​the lower fiber bundle is preferably 10,000 to 40,000 μm 2 , more preferably 12000 to 30000 μm 2 , more preferably 15,000 to 25,000 μm 2 It is.

[0066] The area of ​​the fiber bundle can be determined as follows: Using a laser microscope (for example, Keyence VK-X1000 or an equivalent), observe a set of adjacent regions A and B in the same field of view in five fields of view, determine the area of ​​each fiber bundle from the observed images, and average the areas for each field to determine the area of ​​the fiber bundle.

[0067] The method for controlling the area of ​​the fiber bundle is not particularly limited, but examples thereof include a method for adjusting the sile conditions (temperature, pressure, number of calendar treatments, treatment speed), a method for adjusting the structure of the fiber structure of the fabric, a method for adjusting the density of the fabric, a method for adjusting the number of fibers constituting the fiber bundle, and the like.

[0068] <1-5. Manufacturing method> The fiber sheet of the present invention can be obtained by a method including a step of forming or depositing a metal element or semi-metal element-containing layer on the surface of a textile substrate. When an oxide layer is included, the fiber sheet can be obtained, for example, by a method including a step of forming an oxide layer on the surface of the textile substrate or the metal element or semi-metal element-containing layer.

[0069] Although not particularly limited, the formation can be performed 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, the sputtering method is preferable from the viewpoint of film thickness controllability.

[0070] 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.

[0071] 2.Applications Since the fiber sheet of the present invention has a metallic appearance, it can be used in various fields as a fiber material with unique design properties.

[0072] Specifically, the fiber sheet of the present invention can be used for textile products such as coats, jackets, trousers, skirts, sportswear, dress shirts, knit shirts, blouses, sweaters, cardigans, nightwear, underwear, supporters, socks, tights, hats, scarves, mufflers, collars, gloves, clothing linings, clothing interlinings, clothing padding, work clothes, uniforms, school uniforms, curtains, bedding materials, bedding batting, pillowcases, sheets, mats, carpets, towels, handkerchiefs, masks, filters, decorative cloth / fabrics, wall cloths, wallpaper, and floor coverings. The fiber sheet of the present invention has excellent abrasion resistance, so it can be suitably used in textile products in which a layer containing a metal element or a metalloid element is exposed. A textile product including a fiber sheet is also one aspect of the present invention.

[0073] As another specific example, the fiber sheet of the present invention can be used as a composite material containing the fiber sheet and a resin. The composite material containing the fiber sheet and a resin also constitutes the present invention.

[0074] The composite material of the present invention is not particularly limited as long as it contains the fiber sheet of the present invention and a resin. Preferably, the composite material of the present invention is a fiber-reinforced plastic in which the fiber material of the present invention is contained in a resin as a matrix material.

[0075] The resin is not particularly limited, and various kinds of resins can be used, including, for example, polyamide resins (e.g., nylon), polyphenylene ether, polyoxymethylene, polybutylene terephthalate, polycarbonate, polymethyl methacrylate (PMMA), polystyrene, polypropylene, polyetherimide, and polyethersulfone.

[0076] The composite material of the present invention can be produced in accordance with a conventional method, and can be used in a variety of applications, such as structural materials for producing automobiles (particularly the interior and exterior of automobiles), aircraft, sports-related products (golf shafts, tennis rackets, badminton rackets, fishing rods, skis, snowboards, bats, archery, bicycles, boats, canoes, yachts, windsurfing, etc.), medical instruments, building materials, and electrical equipment (housings for personal computers and the like, speaker cones), etc. EXAMPLES

[0077] The present invention will be described in detail below based on examples, but the present invention is not limited to these examples.

[0078] (1) Manufacturing of fiber sheets Example 1 The textile substrate 1 was placed in a vacuum device and evacuated to a pressure of 5.0×10 Pa or less. Then, argon gas was introduced and a Si layer (average thickness 1.2 nm) was formed as a semi-metal layer on the surface of the textile substrate 1 by DC magnetron sputtering to obtain a laminate 1.

[0079] The laminate 1 was placed in a vacuum device and evacuated to a pressure of 5.0×10 Pa or less. Then, argon gas was introduced and a Ti layer (average thickness 35 nm) was formed as a metal layer on the surface of the semi-metal layer by DC magnetron sputtering to obtain a laminate 2.

[0080] The laminate 2 was placed in a vacuum device and evacuated to a pressure of 5.0×10 Pa or less. Then, argon gas was introduced and a Si layer (average thickness 20 nm) was formed as a semi-metal layer on the surface of the metal layer by magnetron sputtering to obtain a fiber sheet.

[0081] (Examples 2 to 18 and Comparative Examples 1 to 5) A fiber sheet was obtained in the same manner as in Example 1, except that the type of woven fabric substrate, the configuration of layers laminated by sputtering, etc. were changed as shown in the table below.

[0082] The textile substrate used was plain weave, nylon (fiber material), and fibers with thread thicknesses of 20 denier, 30 denier, 40 denier, and 50 denier. In Example 1, the sile conditions were a calender roll temperature of 140° C. and a pressure of 40 kg / cm. 2 The treatment speed was set to 8 m / min, and the height difference H was adjusted. In Examples 2 to 18 and Comparative Examples 1 to 5, the height difference H was adjusted by appropriately changing the shilling conditions with reference to the shilling conditions in Example 1.

[0083] The resulting fiber sheet had a metallic luster.

[0084] (2) Measurement of height difference of fiber bundle The height difference between adjacent warp and weft fiber bundles in a fiber sheet was measured as follows: Using a laser microscope (Keyence VK-X1000), pairs of adjacent regions A and B were observed in five fields of view, and the height difference between regions A and B in each field of view was measured and averaged for each region to determine the height difference (H).

[0085] (3) Measurement of the area of ​​the fiber bundle The areas of the warp fiber bundles and the weft fiber bundles in the fiber sheets according to Examples 11 to 18 were measured as follows: Using a laser microscope (Keyence VK-X1000), pairs of adjacent regions A and B were observed in the same field of view in five fields of view, and the areas of the fiber bundles were calculated from the observed images, and the areas of the fiber bundles were calculated by averaging the areas for each field.

[0086] (4) Evaluation of wear resistance The abrasion resistance of the fiber sheet was evaluated using a Martindale abrasion tester manufactured by JH Heal Co., Ltd., according to the Martindale test method (JIS L 1096 E method, pressing load 9 kPa), with 2000 times or more being rated as ◎, 1000 times or more but less than 2000 times being 〇, and less than 1000 times being ×. The judging point was the number of times when discoloration was grade 3 or less.

[0087] (5) Results The results are shown in Tables 1 to 3.

[0088] [Table 1]

[0089] [Table 2]

[0090] [Table 3]

Claims

1. A fiber sheet comprising a woven substrate and a layer containing a metal element or a semi-metal element and having a thickness of 1 to 200 nm, wherein the height difference between adjacent warp fiber bundles and weft fiber bundles is 7 to 20 μm.

2. The fiber sheet according to claim 1 , wherein an area of ​​a higher fiber bundle is larger than an area of ​​a lower fiber bundle in the adjacent warp fiber bundle and weft fiber bundle.

3. 3. The fibrous sheet according to claim 2, wherein the area of ​​the higher fiber bundles is 1.5 to 2.1 times the area of ​​the lower fiber bundles.

4. The fiber sheet according to any one of claims 1 to 3, wherein the metal element or semi-metal element-containing layer includes a metal layer and a semi-metal layer, and the textile substrate, the metal layer, and the semi-metal layer are arranged in this order.

5. A textile product comprising the fiber sheet according to any one of claims 1 to 4.

6. A composite material comprising the fiber sheet according to any one of claims 1 to 4 and a resin.

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