Inspection tool, inspection method

Abstract

The present application can provide an inspection tool that can easily check whether light that inactivates viruses and the like is being irradiated, and whether light that is harmful to the human body is being irradiated. The inspection tool of the present application is an inspection tool that includes a first display portion and a second display portion, the first display portion is a display portion that produces a visual change when light of at least any wavelength in the range of 200 to 280 nm is irradiated to the front and back of the inspection tool, and the second display portion is a display portion that does not produce a visual change when light of a wavelength in the range of 200 to 230 nm is irradiated to the front and back of the inspection tool, but produces a visual change when light of at least any wavelength in the range of more than 230 nm and 280 nm or less is irradiated to the front and back of the inspection tool.

Description

Technical Field

[0001] This invention relates to an inspection tool and an inspection method. Background Technology

[0002] In recent years, ultraviolet light, especially UV-C (wavelength 200-280nm), has attracted attention for its ability to kill viruses and other germs.

[0003] In the measurement of ultraviolet radiation, for example, Patent Document 1 discloses a method using a "UV marker" (manufactured by NICHIYUGIKEN KOGYO COMPANY, LIMITED, which manufactures UV-H) and Patent Document 2 discloses a method using a "UV scale" (manufactured by FUJIFILM Corporation).

[0004] Previous technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2015-191001

[0007] Patent Document 2: International Publication No. 2017-158943 Summary of the Invention

[0008] The technical problem to be solved by the invention

[0009] On the other hand, UV-C is known to include wavelengths harmful to humans, and the effects of ultraviolet radiation on the human body are a concern. Therefore, especially when UV-C is used in the presence of people, it is desirable to check whether light that deactivates viruses or other harmful substances is being emitted, as well as whether harmful light is being emitted.

[0010] The inventors used conventionally known UV marking and UV scale to check whether light that inactivates viruses or other pathogens was irradiated and whether light harmful to the human body was irradiated. However, the UV marking and UV scale could not simultaneously check whether light that inactivates viruses or other pathogens was irradiated and whether light harmful to the human body was irradiated.

[0011] In view of the above, the present invention provides an inspection tool that can easily check whether light that inactivates viruses or the like has been irradiated and whether light harmful to the human body has been irradiated.

[0012] Furthermore, the subject of this invention is to provide an inspection method.

[0013] means for solving technical problems

[0014] As a result of in-depth research to solve the above-mentioned problems, the inventors discovered that the problems could be solved by the structure described below, and thus completed the present invention.

[0015] (1) An inspection tool, comprising a first display unit and a second display unit,

[0016] The first display unit is a display unit that produces a visual change before and after the inspection tool is illuminated by light of at least any wavelength in the range of 200 to 280 nm.

[0017] The second display unit is a display unit that does not produce visual changes before and after the inspection tool is irradiated with light of a wavelength in the range of 200 to 230 nm, and produces visual changes before and after the inspection tool is irradiated with light of at least any wavelength in the range of 230 nm to 280 nm.

[0018] (2) According to the inspection tool described in (1), wherein,

[0019] Visual changes are selected from changes in color, patterns, brightness, illumination, and combinations thereof.

[0020] (3) The inspection tool according to (1) or (2), wherein,

[0021] The second display unit includes: a filter; and a photosensitive unit that produces a visual change before and after receiving light of at least any wavelength in the range of 230 nm to 280 nm that passes through the filter.

[0022] The filter blocks light in the wavelength range of 200-230nm.

[0023] (4) According to the inspection tool described in (3), wherein,

[0024] The photosensitive part contains a colorant.

[0025] (5) The inspection tool according to (1) or (2) further includes: a first light receiving unit that receives light of at least any wavelength in the range of 200 to 280 nm; a filter; and a second light receiving unit that receives light of at least any wavelength in the range of 230 nm and below 280 nm passing through the filter.

[0026] The filter blocks light in the wavelength range of 200–230 nm.

[0027] The first display unit generates visual changes based on the amount of light received by the first light receiver.

[0028] The second display unit produces visual changes based on the amount of light received by the second light receiver.

[0029] (6) The inspection tool according to any one of (3) to (5), wherein,

[0030] The filter has a transmittance of less than 5% at a wavelength of 222nm.

[0031] The filter has a transmittance of over 50% at a wavelength of 254nm.

[0032] (7) The inspection tool according to any one of (3) to (6), wherein,

[0033] The filter has an average transmittance of less than 1% in the wavelength range of 200–230 nm.

[0034] The filter has an average transmittance of over 50% at wavelengths of 230–280 nm.

[0035] (8) The inspection tool according to any one of (3) to (7), wherein,

[0036] The filter contains resins selected from triacetyl cellulose, polyvinyl chloride, acrylic resins, methacrylic resins, polyurethane, and polyurea.

[0037] (9) The inspection tool according to (1) or (2), wherein,

[0038] The second display unit has a second photosensitive unit that does not produce visual changes before and after sensing light in the wavelength range of 200 to 230 nm, but only in the wavelength range of at least any wavelength exceeding 230 nm and below 280 nm.

[0039] The second photosensitive part contains a compound that blocks light with a wavelength of 200-230 nm.

[0040] (10) The inspection tool according to (9), wherein,

[0041] Compounds that block light with wavelengths of 200–230 nm have a transmittance of less than 5% at a wavelength of 222 nm.

[0042] Compounds that block light with wavelengths of 200–230 nm have a transmittance of over 50% at a wavelength of 254 nm.

[0043] (11) The inspection tool according to (9) or (10), wherein,

[0044] Compounds that block light with wavelengths of 200–230 nm have a partial structure selected from any one of ester bonds, urethane bonds, and urea bonds.

[0045] (12) An inspection method that uses any one of the inspection tools described in (1) to (11).

[0046] Invention Effects

[0047] According to the present invention, an inspection tool can be provided that can easily check whether light that inactivates viruses or the like has been irradiated and whether light harmful to the human body has been irradiated.

[0048] Furthermore, according to the present invention, an inspection method can be provided. Attached Figure Description

[0049] Figure 1 This is a schematic cross-sectional view illustrating an example of the first embodiment of the inspection tool.

[0050] Figure 2 This diagram illustrates the application of light with a wavelength of 222nm to an inspection tool.

[0051] Figure 3 This is a top view of the inspection tool before it is illuminated with light of wavelength 222nm.

[0052] Figure 4 This is a top view of the inspection tool after it has been illuminated with light of a wavelength of 222nm.

[0053] Figure 5 This diagram illustrates the application of light with a wavelength of 222nm and light with a wavelength of 254nm to an inspection tool.

[0054] Figure 6 This is a top view of the inspection tool before it is irradiated with light of wavelength 222nm and wavelength 254nm.

[0055] Figure 7 This is a top view of the inspection tool after it has been irradiated with light of wavelength 222nm and wavelength 254nm.

[0056] Figure 8 This is another way of showing the visual changes of the inspection tool.

[0057] Figure 9 This is another way of showing the visual changes of the inspection tool.

[0058] Figure 10 This is a diagram illustrating another way of representing inspection tools.

[0059] Figure 11 This is a schematic cross-sectional view illustrating an example of a second embodiment of the inspection tool. Detailed Implementation

[0060] The present invention will now be described in detail.

[0061] Furthermore, the description of the constituent elements described below is sometimes carried out according to representative embodiments of the present invention, but the present invention is not limited to these embodiments.

[0062] In this specification, the numerical range indicated by “~” refers to the range encompassed by the values ​​recorded before and after “~” as the lower and upper limits.

[0063] Furthermore, within the numerical ranges described in this specification, the upper or lower limit of a certain numerical range can be replaced with the upper or lower limit of another numerical range described in a different period. Also, within the numerical ranges described in this specification, the upper or lower limit of a certain numerical range can be replaced with the values ​​shown in the embodiments.

[0064] Furthermore, in this specification, solid components refer to components that form the composition layer formed by using the composition. When the composition contains a solvent (e.g., organic solvents and water), it refers to all components other than the solvent. Also, liquid components are considered solid components as long as they form the composition layer.

[0065] Furthermore, in this specification, ultraviolet light refers to light with a wavelength range of 10–400 nm.

[0066] Furthermore, in this specification, (meth)acrylic acid refers to "at least one of acrylic acid and methacrylic acid".

[0067] Furthermore, in this specification, "boiling point" refers to the boiling point under standard atmospheric pressure.

[0068] In this specification, total transmittance can be measured using a haze meter (e.g., NDH2000, manufactured by NIPPON DENSHOKUINDUSTRIES Co., Ltd.) and a C light source.

[0069] The inspection tool of the present invention includes a first display unit and a second display unit. The first display unit is a display unit that produces a visual change before and after the inspection tool is irradiated with light of at least any wavelength in the wavelength range of 200 to 280 nm. The second display unit is a display unit that does not produce a visual change before and after the inspection tool is irradiated with light of a wavelength range of 200 to 230 nm, but produces a visual change before and after the inspection tool is irradiated with light of at least any wavelength in the wavelength range of more than 230 nm and less than 280 nm.

[0070] Furthermore, the visual change occurring before and after irradiation with the aforementioned light refers to the visual change that occurs when comparing the state before irradiation (the unirradiated state) and the state after irradiation (the irradiated state). Here, "after irradiation" refers to the state after irradiation from the unirradiated state, and also includes the concept of the process of irradiation in progress. Therefore, the inspection tool of the present invention can also be an inspection tool that produces a visual change upon irradiation with light.

[0071] In the inspection tool of the present invention, the first display unit is a display unit that produces a visual change before and after the inspection tool is irradiated with light of at least any wavelength in the wavelength range of 200 to 280 nm, thus making it easy to check whether light that inactivates viruses or the like (corresponding to light in the wavelength range of 200 to 280 nm) has been irradiated. Furthermore, the second display unit is a display unit that does not produce a visual change before and after the inspection tool is irradiated with light of a wavelength range of 200 to 230 nm, but produces a visual change before and after the inspection tool is irradiated with light of at least any wavelength in the wavelength range of more than 230 nm and less than 280 nm, thus making it easy to check whether light harmful to the human body has been irradiated. For example, when a lamp emitting light with a wavelength of 222 nm deteriorates, there may be a situation where harmful light with a wavelength exceeding 230 nm and less than 280 nm is emitted. In this case, if the inspection tool of the present invention is used, it is easy to check whether the light emitted by the lamp used has an effect on the human body.

[0072] The following section will first provide a detailed explanation of the aforementioned characteristics of the inspection tool.

[0073] The inspection tool of the present invention includes a first display unit and a second display unit.

[0074] The inspection tool of the present invention can have a first display unit and a second display unit provided on the same component, or it can be provided on different components.

[0075] Regarding visual changes in the first and second display units, there are no particular limitations as long as visual changes occur. For example, changes in color, patterns, brightness, illumination, and combinations thereof (e.g., a combination of color and pattern changes) can be cited.

[0076] Color changes can be exemplified by changes in hue and color changes caused by light emission. Specifically, examples include changes from light to dark or from dark to light.

[0077] Variations in patterns can include changes in graphics, images, and shapes. Specifically, examples include text emerging from a solid color, graphics (illustrations or charts) emerging from a solid color, changes in numbers, changes in text, or changes in graphics.

[0078] Changes in brightness can be exemplified by changes in the luminous intensity, specifically by becoming brighter or dimmer.

[0079] The changes in illumination can be exemplified by the lighting of the light source, such as turning it on, flashing, and turning it off. Specifically, examples include changes in the flashing pattern of the light source and changes in the illuminated light source pattern in an LED (light emitting diode) array.

[0080] As will be described later, when the first display unit and the second display unit are composed of a display screen, the aforementioned visual change is achieved through the display on the display screen; when the first display unit and the second display unit are composed of a photosensitive unit, the photosensitive unit itself can generate the aforementioned visual change.

[0081] The visual changes in the first display unit and the visual changes in the second display unit can be the same or different.

[0082] There are no particular restrictions on the shape of the inspection tool; it can be sheet-like, or it can be a block shape such as a cuboid or cylinder. Among these, sheet-like inspection tools are preferred.

[0083] Furthermore, the shape of the sheet-like inspection tool can utilize various shapes, such as squares, rectangles, circles, ovals, hexagons, and other polygons other than quadrilaterals, as well as irregular shapes.

[0084] Furthermore, sheet-like inspection tools can be long and narrow.

[0085] The lower limit of the thickness of the inspection tool is preferably 5 μm or more, more preferably 25 μm or more. Furthermore, the upper limit of the thickness of the inspection tool is preferably 10 cm or less, more preferably 2 cm or less.

[0086] [First Display Section]

[0087] The first display unit is a display unit that produces visual changes before and after the inspection tool is irradiated with light of at least any wavelength in the range of 200 to 280 nm.

[0088] There are no particular limitations on the light source, which is light of at least any wavelength in the range of 200 to 280 nm. Preferably, a lamp with a maximum absorption wavelength of 207 nm or 222 nm is used as the light source, and more preferably, a lamp with a maximum absorption wavelength of 222 nm is used. That is, the first display unit is preferably a display unit that produces a visual change before and after the inspection tool is illuminated by light from a lamp with a maximum absorption wavelength of 222 nm. Examples of lamps with a maximum absorption wavelength of 222 nm include KrCl excimer lamps, and examples of lamps with a maximum absorption wavelength of 207 nm include KrBr excimer lamps.

[0089] From this perspective, the first display unit is preferably irradiated with 0.1 mJ / cm² of light at a wavelength of 222 nm. 2 The above-described irradiation method produces a visual change before and after exposure. The irradiation dose of light with a wavelength of 222nm that produces the visual change in the first display unit is preferably 0.1 to 10 mJ / cm². 2 More preferably 0.1–6 mJ / cm 2 Further optimization is needed for 0.1–3 mJ / cm³. 2 Especially preferred is 0.1~1mJ / cm 2 The less light required to produce a visual change, the better the sensitivity.

[0090] The first display unit preferably produces a visual change both before and after being irradiated by a filter that blocks light with a wavelength exceeding 230 nm and below 280 nm. This visual change before and after being irradiated by a filter that blocks light with a wavelength exceeding 230 nm and below 280 nm means that a visual change occurs even when irradiated with light excluding wavelength 254 nm.

[0091] [Second Display Unit]

[0092] The second display unit is a display unit that does not produce visual changes before and after the inspection tool is irradiated with light of a wavelength in the range of 200 to 230 nm, but produces visual changes before and after the inspection tool is irradiated with light of at least any wavelength in the range of 230 nm to 280 nm.

[0093] There are no particular limitations on the light source for light of at least any wavelength in the range of irradiation wavelength exceeding 230 nm and below 280 nm, but a lamp with a maximum absorption wavelength of 254 nm is preferred. That is, the second display unit is preferably a display unit that produces a visual change before and after the inspection tool is irradiated with light from a lamp with a maximum absorption wavelength of 254 nm. A low-pressure mercury lamp can be cited as an example of a lamp with a maximum absorption wavelength of 254 nm. From this viewpoint, the second display unit is preferably equipped with an irradiation dose of 0.1 mJ / cm² of light with a wavelength of 254 nm. 2 The above-described irradiation method produces a visual change before and after illumination. In the second display unit, the irradiation dose of light with a wavelength of 254nm that produces the visual change is preferably 0.1 to 10 mJ / cm². 2 More preferably 0.1–6 mJ / cm 2 Further optimization is needed for 0.1–3 mJ / cm³. 2 Especially preferred is 0.1~1mJ / cm 2 The less light required to produce a visual change, the better the sensitivity.

[0094] The second display unit does not produce any visual changes before or after the inspection tool is illuminated with light of wavelengths in the range of 200 to 230 nm.

[0095] As a method for preventing visual changes in the second display unit before and after the inspection tool is irradiated with light of a wavelength in the range of 200 to 230 nm, the following methods can be cited: a method using a component that is not photosensitive before and after the inspection tool is irradiated with light of a wavelength in the range of 200 to 230 nm, but is photosensitive before and after the inspection tool is irradiated with light of at least any wavelength in the range of wavelengths exceeding 230 nm and below 280 nm; and a method using a filter (hereinafter also referred to as filter X) that blocks light in the range of 200 to 230 nm.

[0096] The following provides a detailed explanation of the inspection tools, outlining specific methods.

[0097] [First Embodiment]

[0098] In a first embodiment of the inspection tool of the present invention, the first display unit has a first photosensitive unit that produces a visual change before and after sensing light of at least any wavelength in the range of 200 to 280 nm, and the second display unit has a filter (filter X) that blocks light of 200 to 230 nm, and a second photosensitive unit A that produces a visual change before and after sensing light of at least any wavelength in the range of 230 nm and below that passing through the filter X.

[0099] As will be described later, the first photosensitive part and the second photosensitive part A can be composed of the same component or different components.

[0100] The first display unit and the second display unit preferably have a support for supporting the first display unit and the second display unit. The support for the first display unit and the support for the second display unit may be the same or different.

[0101] Figure 1 The specific manner of the first embodiment described above is indicated. Figure 1 This is a schematic cross-sectional view illustrating an example of the first embodiment of the inspection tool. Figure 1 The inspection tool 10 shown includes, in sequence, a support 12, a photosensitive part 14, and a filter 16. The filter 16 is disposed on a portion of the surface of the photosensitive part 14 opposite to the side of the support 12. That is, the filter 16 is disposed to cover a portion of the surface of the photosensitive part 14.

[0102] In addition, Figure 1In this configuration, the filter 16 is arranged in connection with the photosensitive part 14, but it is not limited to this configuration. Other layers (e.g., adhesive layer and bonding agent layer) may also be arranged between the filter 16 and the photosensitive part 14.

[0103] The photosensitive unit 14 is a photosensitive unit that can sense any light with a wavelength of 200-280 nm and produces visual changes before and after light exposure. Furthermore, in Figure 1 The present invention describes a method by which the photosensitive unit 14 can sense all wavelengths in the range of 200 to 280 nm, but the present invention is not limited to this method. As described above, it is possible to sense at least any wavelength in the range of 200 to 280 nm.

[0104] Filter 16 corresponds to the filter X described above, and corresponds to a filter that blocks light with wavelengths of 200 to 230 nm. In addition, filter 16 allows at least a portion of light in the wavelength range of 400 to 700 nm to pass through.

[0105] In the inspection tool 10, the portion consisting only of the support 12 and the photosensitive part 14 and surrounded by a dashed line corresponds to the first display part 18, and the portion consisting of the support 12, the photosensitive part 14, and the filter X and surrounded by a dashed line corresponds to the second display part 20.

[0106] The following describes the application of light with a wavelength of 222nm to... Figure 1 The condition of the inspection tool 10 shown will be explained.

[0107] like Figure 2 As shown, light with a wavelength of 222nm is irradiated from the side of the inspection tool 10 equipped with the filter 16, as indicated by the hollow arrow. Figure 2 As shown, light with a wavelength of 222 nm is irradiated into the photosensitive part 14A of the inspection tool 10, which is not covered by the filter 16, thereby exposing the photosensitive part 14A to light. In contrast, as... Figure 2 As shown, in the photosensitive part 14B of the inspection tool 10 that is not covered by the filter 16, the wavelength 222nm is blocked by the filter 16, so the light with a wavelength of 222nm cannot reach the photosensitive part 14B, and therefore the photosensitive part 14B is not photosensitive.

[0108] Here, it is assumed that the photosensitive part 14 changes from white to black visually before and after light in the wavelength range of 200 to 280 nm.

[0109] Therefore, firstly, when observing the inspection tool 10 from its normal direction before irradiating it with light of wavelength 222nm, as shown... Figure 3 As shown, photosensitive parts 14A and 14B of the photosensitive parts 14 included in the inspection tool 10 are both white. In contrast, as described above... Figure 2 After illuminating the inspection tool 10 with light of wavelength 222nm, as... Figure 4 As shown, the photosensitive part 14A of the photosensitive part 14 included in the inspection tool 10 turns black when it is exposed to light with a wavelength of 222nm, while the photosensitive part 14B does not expose to light with a wavelength of 222nm due to the filter 16, and therefore remains white.

[0110] Therefore, assuming that the light irradiating the inspection tool 10 includes light with a wavelength of 222nm that helps to inactivate viruses, etc., and does not include light that is harmful to the human body, i.e., light with wavelengths exceeding 230nm but below 280nm, the inspection tool displays as follows: Figure 4 The visual changes shown make it easy to detect the presence of wavelengths in the irradiated light that contribute to the inactivation of viruses, but exclude harmful light in the range of wavelengths between 230 nm and 280 nm.

[0111] Next, light including light with a wavelength of 222nm and light with a wavelength of 254nm was irradiated onto... Figure 1 The situation of the inspection tool 10 shown will be explained. Both wavelengths of light of 222nm and 254nm are wavelengths that help to deactivate viruses, but wavelength of light of 254nm corresponds to a wavelength of light that is also harmful to the human body.

[0112] like Figure 5 As shown, light including light with a wavelength of 222nm and light with a wavelength of 254nm is irradiated from the side of the inspection tool 10 equipped with the filter 16. Additionally, Figure 5 In the diagram, a hollow arrow represents illumination from light with a wavelength of 222 nm, and a black arrow represents illumination from light with a wavelength of 254 nm. For example... Figure 5 As shown, light with a wavelength of 222 nm and light with a wavelength of 254 nm are irradiated into the photosensitive part 14A of the inspection tool 10 that is not covered by the filter 16, thereby exposing the photosensitive part 14A to light. In contrast, as... Figure 5 As shown, in the photosensitive part 14B of the inspection tool 10 that is not covered by the filter 16, although the light with a wavelength of 222nm is blocked by the filter 16, the photosensitive part 14B is exposed to light because the light with a wavelength of 254nm passes through the filter 16.

[0113] Here, it is assumed that the photosensitive part 14 changes from white to black visually before and after light in the wavelength range of 200 to 280 nm.

[0114] Therefore, firstly, before irradiating light including light with a wavelength of 222nm and light with a wavelength of 254nm, such as Figure 6 As shown, photosensitive parts 14A and 14B of the photosensitive parts 14 included in the inspection tool 10 are both white. In contrast, as described above... Figure 5After irradiating the inspection tool 10 with light including light with a wavelength of 222nm and light with a wavelength of 254nm, as... Figure 7 As shown, the photosensitive part 14A of the photosensitive part 14 included in the inspection tool 10 turns black when it is exposed to light with a wavelength of 222nm and light with a wavelength of 254nm, and the photosensitive part 14B also turns black when it is exposed to light with a wavelength of 254nm.

[0115] Therefore, assuming that the light irradiating the inspection tool 10 includes light with a wavelength of 222nm that helps to inactivate viruses and the like, and light with a wavelength of 254nm that is harmful to the human body, the inspection tool displays the following... Figure 7 The visual changes shown make it easy to detect whether the irradiated light includes wavelengths that contribute to the inactivation of viruses, or wavelengths that are harmful to the human body, such as 254nm.

[0116] In addition, in the above Figure 4 The illustration shows a visual change from white to black when the photosensitive element 14A is sensitive to light in the wavelength range of 200-280 nm. However, the present invention is not limited to this method; any method that produces a visual change as described above is acceptable. For example, it could be as follows: Figure 8 The pattern change shown in the stripe pattern generated in the photosensitive part 14A can also be as follows: Figure 9 The image shows a change in the pattern of text such as "disinfection" generated in the photosensitive part 14A. This can be achieved by applying the luminescent agent and photoactive agent (described later) only to the part where the change occurs.

[0117] Furthermore, in Figure 1 The above describes a structure in which photosensitive part 14A and photosensitive part 14B are connected, but it is not limited to this method. For example, as shown in... Figure 10 As shown, the photosensitive unit 14A and the photosensitive unit 14B can be prepared as separate components. Figure 10 The inspection tool 30 shown prepares a sheet including a support 12 and a photosensitive part 14A, and a sheet including a support 12, a photosensitive part 14B and a filter 16, and places the two sheets on the holding substrate 22.

[0118] Hereinafter, each component of the first embodiment of the inspection tool will be described in detail.

[0119] <<Support Body>>

[0120] Examples of materials that can be used as a support include resin sheets, paper (including synthetic paper), cloth (including woven and nonwoven fabrics), glass, wood, and metal. Resin sheets or paper are preferred as supports, resin sheets or synthetic paper are more preferred, and resin sheets are even more preferred.

[0121] Examples of resin sheet materials include polyethylene resins, polypropylene resins, cyclic polyolefin resins, polystyrene resins, acrylonitrile-styrene copolymers, acrylonitrile-butadiene-styrene copolymers, polyvinyl chloride resins, fluorinated resins, poly(meth)acrylic acid resins, polycarbonate resins, polyester resins (such as polyethylene terephthalate and polyethylene naphthalate), various nylon and other polyamide resins, polyimide resins, polyamide-imide resins, polyaryl phthalate resins, silicone resins, polysulfone resins, polyphenylene sulfide resins, polyethersulfone resins, polyurethane resins, acetal resins, and cellulose resins. As a support, resins that absorb light with a wavelength of 222 nm and transmit light with a wavelength of 254 nm (e.g., triacetyl cellulose (TAC) sheets) are also preferred.

[0122] Examples of synthetic paper include synthetic paper (such as YUPO) formed by biaxial stretching of polypropylene or polyethylene terephthalate, synthetic paper made using synthetic fibers such as polyethylene, polypropylene, polyethylene terephthalate and polyamide, and synthetic paper made by layering these fibers on one or both sides of a paper.

[0123] Furthermore, as a preferred method for resin sheets, white resin sheets made by dispersing white pigment in resin can be cited. The same material as the resin used in the aforementioned white resin sheets can be cited.

[0124] As for white resin sheets and white pigments, reference can be made to the white resin films and white pigments described in paragraph 0080 of International Publication No. 2016 / 017701, and these contents are incorporated into this specification.

[0125] Regarding white resin sheets, white polyester sheets are preferred, and white polyethylene terephthalate sheets are more preferred.

[0126] Commercially available white resin sheets include YUPO (manufactured by Yupo Corporation), Lumirror (manufactured by Toray Industries, Inc.), and CRISPR (manufactured by TOYOBO CO., LTD.).

[0127] The minimum thickness of the support is preferably 5 μm or more, more preferably 25 μm or more, and even more preferably 50 μm or more. The maximum thickness is preferably 1 cm or less, more preferably 2 mm or less, and even more preferably 500 μm.

[0128] Department 1 (Photographic Department)

[0129] The first photosensitive unit produces a visual change before and after being exposed to light of at least any wavelength in the wavelength range of 200 to 280 nm (hereinafter, "specific ultraviolet X"). Preferably, the first photosensitive unit is sensitive to light with a wavelength of at least 222 nm. The first photosensitive unit can be sensitive to light of multiple wavelengths in the wavelength range of 200 to 280 nm, or it can be sensitive to light of all wavelengths in the wavelength range of 200 to 280 nm.

[0130] The first photosensitive part preferably includes a chromophore, and from the viewpoint of being able to further improve the sensitivity to light with a wavelength of 222nm, it is more preferable to include both a chromophore and a photoactive agent.

[0131] The main color-developing mechanism when a photoactive agent and a chromophore are present is speculated as follows: The photoactive agent absorbs specific ultraviolet light X and is activated to generate acids and / or free radicals. The chromophore then develops color by reacting with these acids and / or free radicals. The amount of acids and / or free radicals generated from the photoactive agent varies depending on the amount of specific ultraviolet light X irradiated. Consequently, the amount of chromophore that develops color also varies depending on the amount of acids and / or free radicals generated from the photoactive agent. As a result, in the irradiated area of ​​the first photosensitive part by the specific ultraviolet light X, the concentration of color development varies according to the amount of specific ultraviolet light X irradiated, forming a color-developing section that develops color at a concentration corresponding to the amount of specific ultraviolet light X irradiation.

[0132] Therefore, when the first photosensitive part is irradiated by a specific ultraviolet X, a color-developing part (color-developing image) is formed in the area irradiated by the specific ultraviolet X (the area irradiated by ultraviolet X) with a color-developing concentration corresponding to the amount of irradiation of the specific ultraviolet X (e.g., cumulative illuminance). Developing color with a color-developing concentration corresponding to the amount of irradiation of the specific ultraviolet X means that the color-developing image has color gradation corresponding to the amount of irradiation of the specific ultraviolet X.

[0133] (Coloring agent)

[0134] Color-developing agents are compounds that color or change color through the action of acids, oxidation, and light irradiation. The term "color development" as used below includes both coloring and color change. Coloring includes the development of color from a substantially colorless state (colorless or pale-colored) through the action of acids, oxidation, and light irradiation. Furthermore, color change includes the change of color from a specific hue to another hue due to the influence of acids, oxidation, and light irradiation (e.g., a change from yellow to red).

[0135] There are no particular limitations on the type of color-developing agent. Examples include color-developing agents that develop color through oxidation, color-developing agents that develop color through the action of acid, and color-developing agents that develop color through the action of light. Among these, color-developing agents that develop color through oxidation or color-developing agents that develop color through the action of acid are preferred.

[0136] As a color-generating agent, colorless pigments or photochromic pigments are preferred, and colorless pigments are more preferred.

[0137] As photochromic pigments, known examples include compounds that develop color through isomerization under light, compounds that absorb light and emit light of a different wavelength (also called luminescent pigments), compounds that develop color through a ring-closing reaction under light, and compounds that develop color through a ring-opening reaction under light. Known photochromic pigments can be used. As a photochromic pigment, a color development and decolorization reaction that is reversibly carried out by energy is preferred. Examples of luminescent pigments include coumarin derivatives and rhodamine B and other rhodamine derivatives.

[0138] As the aforementioned colorless pigment, preferably is a compound that develops color by oxidation from a substantially colorless state (hereinafter also referred to as "oxidative color-developing colorless pigment") or a compound that develops color from a substantially colorless state by the action of acid (hereinafter also referred to as "acid-developing colorless pigment").

[0139] Examples of colorless pigments include triarylmethane phthalides, fluorane compounds, phenanthrene compounds, indole phthalides, azidoindole phthalides, colorless gold amine compounds, rhodamine lactam compounds, triarylmethane compounds, diarylmethane compounds, triazine compounds, spiropyran compounds, thiazide compounds, and fluorene compounds.

[0140] For details regarding the above-mentioned compounds, please refer to U.S. Patent No. 3,445,234, Japanese Patent Application Publication No. 5-257,272, and International Publication No. 2009 / 8248, paragraphs 0029 to 0034.

[0141] A single colorant can be used alone, or two or more can be used in combination.

[0142] Oxidative colorless pigments

[0143] As a method of oxidative colorless pigment, compounds having one or two hydrogen atoms that emit color by removing electrons are preferred. Examples of such oxidative colorless pigments include (a) aminotriarylmethane, (b) aminoxanthin, (c) aminothiamine, (d) amino-9,10-dihydroacridine, (e) aminophenoxazine, (f) aminophenithazine, (g) aminodihydrophenazine, (h) aminodiphenylmethane, (i) colorless indamine, (j) aminohydrocinnamic acid (ethylene cyanide, colorless methyl sulfoxide), (k) hydrazine, (l) colorless indigo dye, (m) amino-2,3-dihydroanthraquinone, (n) tetrahalo-p,p'-biphenyl, (o) 2-(p-hydroxyphenyl)-4,5-diphenylimidazole, and (p) phenethylaniline. In the above (a) to (p), (a) to (i) develop color by losing 1 hydrogen atom, and (j) to (p) develop color by losing 2 hydrogen atoms.

[0144] Among these, aminoarylmethane is preferred, aminotriarylmethane is more preferred, and 4-dialkylaminotriarylmethane is even more preferred.

[0145] Specific examples of colorless pigments with oxidative chromogenic properties include tris(4-dimethylaminophenyl)methane, tris(4-diethylaminophenyl)methane, bis(4-diethylaminophenyl)-(4-diethylamino-2-methylphenyl)methane, bis(4-diethylamino-2-methylphenyl)-(4-diethylaminophenyl)methane, bis(1-ethyl-2-methylindol-3-yl)-phenylmethane, 2-N-(3-trifluoromethylphenyl)-N-ethylamino-6-diethylamino-9-(2-methoxycarbonylphenyl)xanthine, 2-(2 2-(2-chlorophenyl)amino-6-dibutylamino-9-(2-methoxycarbonylphenyl)xanthonium, 2-dibenzylamino-6-diethylamino-9-(2-methoxycarbonylphenyl)xanthonium, benzo[a]-6-N,N-diethylamino-9,2-methoxycarbonylphenylxanthonium, 2-(2-chlorophenyl)-amino-6-dibutylamino-9-(2-methylphenylcarboxyamidophenyl)xanthonium, 3,6-dimethoxy-9-(2-methoxycarbonyl)-phenylxanthonium, benzoyl colorless methylene blue, and 3,7-bis-diethylaminophenoxazine, etc.

[0146] Acid-based colorless pigments

[0147] As a type of acid-chromogenic colorless pigment, compounds that emit color by donating electrons or accepting protons such as acids are preferred. Specifically, compounds having partial skeletons such as lactones, lactams, sulopentalides, spiropyrans, esters, and amides, and whose partial skeletons open or cleave upon contact with acids or protons.

[0148] Examples of colorless pigments that develop color through the action of acids (acid-based colorless pigments) include 3,3-bis(2-methyl-1-octyl-3-indolyl)phthalide, 6'-(dibutylamino)-2'-bromo-3'-methylspiro[phthalide-3,9'-xanthine], 3-(4-diethylamino-2-ethoxyphenyl)-3-(1-ethyl-2-methylindol-3-yl)-4-azaphthalide, and 3-(4-diethylamino-2-ethoxyphenyl)-3-(1-ethyl-2-methylindol-3-yl)-4-azaphthalide. -ethoxyphenyl)-3-(1-n-octyl-2-methylindole-3-yl)phthalide, 3-[2,2-bis(1-ethyl-2-methylindole-3-yl)vinyl]-3-(4-diethylaminophenyl)phthalide, 2-anilino-6-dibutylamino-3-methylfluorane, 6-diethylamino-3-methyl-2-(2,6-dimethylphenylamino)fluorane, 2-(2-chloroanilino)-6-dibutylaminofluorane, 3 3-Bis(4-dimethylaminophenyl)-6-dimethylaminophthalide, 2-anilino-6-diethylamino-3-methylfluorane, 9-[ethyl(3-methylbutyl)amino]spiro[12H-benzo[a]xanthan-12,1'(3'H)isobenzofuran]-3'-one, 2'-methyl-6'-(N-p-tolyl-N-ethylamino)spiro[isobenzofuran-1(3H),9'-[9H]xanthan]-3-one 3',6'-bis(diethylamino)-2-(4-nitrophenyl)spiro[isoindol-1,9'-xanthon]-3-one, 9-(N-ethyl-N-isopentylamino)spiro[benzo[a]xanthon-12,3'-phthalide], 2'-anilino-6'-(N-ethyl-N-isopentylamino)-3'-methylspiro[phthalide-3,9'-[9H]xanthon] and 6'-(diethylamino)-1',3'-dimethylfluorane.

[0149] From the viewpoint of achieving better results with the present invention, the colorant is preferably a compound having either an indolephthalide structure or an aza-indolephthalide structure, and more preferably a compound having an indolephthalide structure.

[0150] Compounds having an indolephthalide structure are compounds that have an indolephthalide structure as a partial structure. Furthermore, as described above, the compounds having an indolephthalide structure (indolephthalide compounds) and compounds having an aza-indolephthalide structure (aza-indolephthalide compounds) function as chromophores. That is, the above compounds correspond to chromophores having an indolephthalide structure (especially acid chromophores) and chromophores having an aza-indolephthalide structure.

[0151] There is no particular limitation on the number of indolephthalide structures in the compound having the indolephthalide structure; it can be one or more. However, from the viewpoint of better performance of the present invention, two or more indolephthalide structures are preferred, and more preferably two indolephthalide structures.

[0152] As a compound having an indolephthalide structure, the compound represented by general formula (B) is preferred.

[0153] [Chemical Formula 1]

[0154]

[0155] In general formula (B), R b1 ~R b4 Each can be represented independently as a hydrogen atom or an alkyl group that may have substituents.

[0156] Regarding R b1 and R b3 The number of carbon atoms in the alkyl group is not particularly limited, but from the viewpoint of better effect of the present invention, 1 to 30 is preferred, 1 to 20 is more preferred, 1 to 12 is even more preferred, and 5 to 10 is particularly preferred.

[0157] Regarding R b2 and R b4 The number of carbon atoms in the alkyl group is not particularly limited, but from the viewpoint of better performance of the present invention, 1 to 10 is preferred, 1 to 5 is more preferred, and 1 to 3 is even more preferred.

[0158] From the viewpoint of achieving better results with the present invention, as R b1 ~R b4 Preferably, it may be an alkyl group with a substituent, more preferably an unsubstituted alkyl group.

[0159] X b Indicates -O- or -NR b5 -

[0160] From the viewpoint of achieving superior effects of the present invention, X is... b , preferred -O-.

[0161] R b5 It represents a hydrogen atom, an alkyl group that may have substituents, or an aryl group that may have substituents.

[0162] Regarding R b5 The number of carbon atoms in the alkyl group is not particularly limited, but from the viewpoint of better performance of the present invention, 1 to 10 is preferred, and 1 to 5 is more preferred.

[0163] R b5 The aryl group can be a monocyclic structure or a polycyclic structure.

[0164] There are no particular limitations on the molecular weight of the compound represented by general formula (B), but it is preferably 300 or more, more preferably 500 or more. There are no particular upper limits, but it is preferably 2000 or less, more preferably 1000 or less.

[0165] There are no particular restrictions on the amount of chromophore in the first photosensitive part, but considering the excellent colorimetric sensitivity at a wavelength of 222nm, the amount of chromophore should be relatively high per unit area (m²). 2 ) Preferably 0.500g / m 2 Below, 0.300 g / m is preferred. 2 The following is a further preferred value of 0.140 g / m 2 The following is particularly preferred: 0.070 g / m 2 The following is a lower limit; there is no specific restriction, but 0.020 g / m² is preferred. 2 More preferably, 0.030 g / m 2 The above suggests that by setting the content of the chromophore in the first photosensitive part to the above range, excessive absorption of the chromophore at 222nm can be suppressed, thus allowing it to be set to the minimum chromophore dose required for the chromophore reaction, resulting in excellent chromophore sensitivity at a wavelength of 222nm.

[0166] The content of the aforementioned chromophore can be calculated as follows: After immersing the first photosensitive part in methanol for 2 days, the resulting solvent is analyzed using liquid chromatography. Furthermore, methanol evaporation should be avoided during immersion. Additionally, if necessary, a calibration curve for the content of the chromophore to be detected can be prepared before the liquid chromatography determination.

[0167] The determination conditions for liquid chromatography are as follows.

[0168] Device: Nexera manufactured by Shimadzu Corporation

[0169] Column: Capcell pak C18 UG-120

[0170] Eluent: Water / Methanol

[0171] Oven: 40℃

[0172] Injection: 5μL

[0173] Detection: The maximum absorption wavelength of the chromophore being detected.

[0174] Flow rate: 0.2 mL / min

[0175] (Photoactive agents)

[0176] The photoactive agent is preferably a photoactivated compound, and more preferably, a photoactivated photoactive agent acts on a chromophore to produce color. The photoactive agent is preferably activated by light of at least any wavelength in the range of 200–280 nm, and more preferably by light of at least 222 nm. The photoactive agent can be activated by light of multiple wavelengths in the range of 200–280 nm, or by light of all wavelengths in the range of 200–280 nm.

[0177] As a photoactive agent, it is preferred to have one or more of a photooxidant and a photoacid-generating agent. When the first photosensitive part contains a color-generating agent that is oxidized and develops color, the photoactive agent preferably contains a photooxidant; when the first photosensitive part contains a color-generating agent that develops color through the action of acid, the photoactive agent preferably contains a photoacid-generating agent.

[0178] From the viewpoint of achieving better results with the present invention, the mass ratio of the content of the photoactive agent to the content of the chromophore (photoactive agent / chromophore (mass ratio)) is preferably greater than 1.00, more preferably 3.00 or more, even more preferably 8.00 or more, and particularly preferably 10.00 or more. There is no particular upper limit, but it is preferably 40.00 or less, more preferably 30.00 or less, even more preferably 25.00 or less, and particularly preferably 20.00 or less. It is believed that by setting the mass ratio of the content of the photoactive agent to the content of the chromophore within the above range, excessive absorption of light with a wavelength of 222 nm by the chromophore can be suppressed, and the chromophore reaction proceeds effectively due to the efficient absorption of light with a wavelength of 222 nm by the photoactive agent, and the chromophore sensitivity to light with a wavelength of 222 nm is excellent.

[0179] Methanol can be extracted in the same manner as the chromophore described above, and the mass ratio of the photoactive agent content to the chromophore content can be determined by liquid chromatography. Furthermore, the photoactive agent is detected at its maximum absorption wavelength, and the chromophore is detected at its maximum absorption wavelength, and their mass ratio is calculated.

[0180] Photooxidants

[0181] As a photooxidizing agent, it is preferably a compound that generates free radicals by being activated by ultraviolet light and / or enables the colorant to develop color by exhibiting the effect of extracting hydrogen atoms from the colorant.

[0182] As a photooxidizing agent, one or more of a free radical generator and an organohalogen compound are preferred. As a photoacid generator, it is also preferred to use a free radical generator and an organohalogen compound simultaneously. When a free radical generator and an organohalogen compound are used simultaneously, from the viewpoint of better color gradation of the chromatic part, the content ratio of the free radical generator to the organohalogen compound (free radical generator / organohalogen compound (mass ratio)) is preferably 0.1 to 10, more preferably 0.5 to 5.

[0183] Free radical generators

[0184] As a free radical generator, a compound that generates free radicals upon activation by ultraviolet light is preferred; a compound that generates free radicals upon activation by light of at least any wavelength in the wavelength range of 200 to 280 nm is more preferred; and a compound that generates free radicals upon activation by light of at least 222 nm is even more preferred. A free radical generator can be a compound that generates free radicals upon activation by light of multiple wavelengths in the wavelength range of 200 to 280 nm, or a compound that generates free radicals upon activation by light of all wavelengths in the wavelength range of 200 to 280 nm.

[0185] As a free radical generator, a hydrogen abstraction type free radical generator is preferred. Hydrogen abstraction type free radical generators exhibit the effect of extracting hydrogen atoms from the chromophore to promote the oxidation of the chromophore.

[0186] Examples of free radical generators include, for instance, the azide polymer described on page 55 of the keynote speech at the Spring 1968 Research Presentation of the Photographic Society of Japan; azide compounds such as 2-azidobenzoxazole, benzoyl azide, and 2-azidobenzimidazole described in US Patent No. 3,282,693; 3'-ethyl-1-methoxy-2-anthocyanin perchlorate pyridinium thiophosphate and 1-methoxy-2-methylpyridinium p-toluenesulfonate described in US Patent No. 3,615,568; 2,4,5-triarylimidazolium dimer and other rotenoid dimers described in Japanese Patent Publication No. 62-039728; benzophenone; p-aminophenyl ketone; polynuclear quinone; thioxanthium, etc.

[0187] Preferably, it is selected from one or more of rofenamic acid dimer and benzophenone, and more preferably rofenamic acid dimer.

[0188] Examples of hexaaryl biimidazole compounds can be cited as hexaaryl biimidazole dimers. Compounds described in paragraph 0047 of International Publication No. 2016 / 017701 can be referenced as hexaaryl biimidazole compounds, and these contents are incorporated herein by reference.

[0189] Of particular, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-diimidazole is preferred. As 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-diimidazole, for example, "B-IMD" (manufactured by KUROGANE KASEICo., Ltd.) and "B-CIM" (manufactured by Hodogaya Chemical Co., Ltd.) can be used.

[0190] Free radical generators can be used alone or in combination of two or more.

[0191] Organic halogen compounds

[0192] Organohalogen compounds can promote the oxidation of colorants.

[0193] From the viewpoint of achieving superior color gradation in the chromatic region, compounds with three or more halogen atoms within the molecule are preferred as organohalogen compounds. The upper limit for the number of halogen atoms is preferably nine or less. Furthermore, the organohalogen compound is any compound other than roxene dimer and benzophenone.

[0194] Organic halogen compounds can be used alone or in combination of two or more.

[0195] As organohalogen compounds, examples include compounds represented by the following general formulas (2) to (7).

[0196] P 0 -CX3 (2)

[0197] In the formula, P 0 This represents a hydrogen atom, a halogen atom, an alkyl group that may have substituents, or an aryl group that may have substituents. X represents a halogen atom independently.

[0198] As P 0 The halogen atom represented by X can be a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom, with chlorine or bromine atom being preferred.

[0199] As P 0 The alkyl and aryl groups represented may have substituents, such as hydroxyl, halogen atom, alkyl with 1 to 6 carbon atoms, haloalkyl with 1 to 6 carbon atoms, acetyl, and alkoxy with 1 to 6 carbon atoms.

[0200] Examples of compounds represented by general formula (2) include chloroform, tribromomethane, carbon tetrachloride, carbon tetrabromide, p-nitrobenzotribromo, bromochloromethane, trichlorotoluene, hexabromoethane, triiodomethane, 1,1,1-tribromo-2-methyl-2-propanol, 1,1,2,2-tetrabromoethane, 2,2,2-tribromoethanol, and 1,1,1-trichloro-2-methyl-2-propanol.

[0201] [Chemical Formula 2]

[0202]

[0203] In the formula, R represents a substituent. x represents an integer from 0 to 5.

[0204] Examples of substituents represented by R include nitro, halogen atom, alkyl group with 1 to 3 carbon atoms, haloalkyl group with 1 to 3 carbon atoms, acetyl group, haloacetyl group, and alkoxy group with 1 to 3 carbon atoms.

[0205] Furthermore, when there are multiple R in the formula, R can be the same as each other or different from each other.

[0206] For x, an integer from 0 to 3 is preferred.

[0207] Examples of compounds represented by general formula (3) include o-nitro-α,α,α-tribromoacetophenone, m-nitro-d,d,d-tribromoacetophenone, p-nitro-α,α,α-tribromoacetophenone, α,α,α-tribromoacetophenone and α,α,α-tribromo-3,4-dichloroacetophenone.

[0208] R 1 -SO2-X 1 (4)

[0209] In the formula, R 1 This indicates an alkyl group that may have substituents or an aryl group that may have substituents. X 1 This represents a halogen atom.

[0210] As R 1 The alkyl group represented is preferably an alkyl group having 1 to 20 carbon atoms, more preferably an alkyl group having 1 to 10 carbon atoms, and even more preferably an alkyl group having 1 to 6 carbon atoms.

[0211] As R 1 The aryl group represented is preferably an aryl group with 6 to 20 carbon atoms, more preferably an aryl group with 6 to 14 carbon atoms, and even more preferably an aryl group with 6 to 10 carbon atoms.

[0212] As R 1The alkyl and aryl groups represented may have substituents, for example, nitro, halogen atom, alkyl with 1 to 3 carbon atoms, haloalkyl with 1 to 3 carbon atoms, acetyl, haloacetyl and alkoxy with 1 to 3 carbon atoms.

[0213] As X 1 The halogen atom represented can be a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom, preferably a chlorine atom, a bromine atom, or an iodine atom, and more preferably a chlorine atom or a bromine atom.

[0214] Examples of compounds represented by general formula (4) include 2,4-dinitrobenzenesulfonyl chloride, o-nitrobenzenesulfonyl chloride, m-nitrobenzenesulfonyl chloride, 3,3'-diphenylsulfonyl disulfonyl chloride, ethanesulfonyl chloride, p-bromobenzenesulfonyl chloride, p-nitrobenzenesulfonyl chloride, 3-p-benzenesulfonyl chloride, p-acetamidebenzenesulfonyl chloride, p-chlorobenzenesulfonyl chloride, p-toluenesulfonyl chloride, methanesulfonyl chloride, and benzenesulfonyl bromide.

[0215] R 2 -SX 2 (5)

[0216] In the formula, R 2 This indicates an alkyl group that may have substituents or an aryl group that may have substituents. X 2 This represents a halogen atom.

[0217] As R 2 The alkyl groups and aryl groups represented can have substituents, and are related to R in general formula (4). 1 The methods are the same, and the preferred methods are also the same.

[0218] As X 2 The halogen atom represented can be a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom, preferably a chlorine atom, a bromine atom, or an iodine atom, and more preferably a chlorine atom or a bromine atom.

[0219] Examples of compounds represented by general formula (5) include 2,4-dinitrobenzenesulfonyl chloride and o-nitrobenzenesulfonyl chloride.

[0220] R 3 -L 1 -CX 3 X 4 X 5 (6)

[0221] In the formula, R 3 This indicates an aryl group that may have substituents or a heteroaryl group that may have substituents. L 1 Indicates -SO- or SO2-. X 3 X 4 and X 5 Each can be represented independently as either a hydrogen atom or a halogen atom. Where X...3 X 4 and X 5 It is not entirely composed of hydrogen atoms.

[0222] As R 3 The aryl group represented is preferably an aryl group with 6 to 20 carbon atoms, more preferably an aryl group with 6 to 14 carbon atoms, and even more preferably an aryl group with 6 to 10 carbon atoms.

[0223] As R 3 The heteroaryl group represented is preferably a heteroaryl group with 4 to 20 carbon atoms, more preferably a heteroaryl group with 4 to 13 carbon atoms, and even more preferably a heteroaryl group with 4 to 9 carbon atoms.

[0224] As R 3 The substituents that the aryl and heteroaryl groups represented can have include, for example, nitro, halogen atom, alkyl with 1 to 3 carbon atoms, haloalkyl with 1 to 3 carbon atoms, acetyl, haloacetyl and alkoxy with 1 to 3 carbon atoms.

[0225] As X 3 X 4 and X 5 The halogen atom represented may include, for example, fluorine, chlorine, bromine and iodine atoms, preferably chlorine, bromine or iodine atom, more preferably chlorine or bromine atom.

[0226] Examples of compounds represented by general formula (6) include hexabromodimethyl sulfoxide, pentabromodimethyl sulfoxide, hexabromodimethyl sulfone, trichloromethylphenyl sulfone, tribromomethylphenyl sulfone (BMPS), trichloro-p-chlorophenyl sulfone, tribromomethyl-p-nitrophenyl sulfone, 2-trichloromethylbenzothiazole sulfone, 4,6-dimethylpyrimidin-2-tribromomethyl sulfone, tetrabromodimethyl sulfone, 2,4-dichlorophenyl-trichloromethyl sulfone, 2-methyl-4-chlorophenyltrichloromethyl sulfone, 2,5-dimethyl-4-chlorophenyltrichloromethyl sulfone, 2,4-dichlorophenyltrimethyl sulfone, and tri-p-tolylsulfonium trifluoromethanesulfonate, preferably trichloromethylphenyl sulfone or tribromomethylphenyl sulfone (BMPS).

[0227] R 4 CX 6 X 7 X 8 (7)

[0228] In the formula, R 4 This indicates a heteroaryl group that can have substituents. X 6 X 7 and X 8 Each can be represented independently as either a hydrogen atom or a halogen atom. Where X... 6 X 7 and X 8 It is not entirely composed of hydrogen atoms.

[0229] As R 4 The heteroaryl group represented is preferably a heteroaryl group with 4 to 20 carbon atoms, more preferably a heteroaryl group with 4 to 13 carbon atoms, and even more preferably a heteroaryl group with 4 to 9 carbon atoms.

[0230] As R 4 The substituents that the heteroaryl group can have include, for example, nitro, halogen atom, alkyl group with 1 to 3 carbon atoms, haloalkyl group with 1 to 3 carbon atoms, acetyl group, haloacetyl group, and alkoxy group with 1 to 3 carbon atoms.

[0231] As X 6 X 7 and X 8 The halogen atom represented may include, for example, fluorine, chlorine, bromine and iodine atoms, preferably chlorine, bromine or iodine atom, more preferably chlorine or bromine atom.

[0232] Examples of compounds represented by general formula (7) include tribromoquinazine, 2-tribromomethyl-4-methylquinoline, 4-tribromomethylpyrimidine, 4-phenyl-6-tribromomethylpyrimidine, 2-trichloromethyl-6-nitrobenzothiazole, 1-phenyl-3-trichloromethylpyrazole, 2,5-ditribromomethyl-3,4-dibromothiophene, 2-trichloromethyl-3-(p-butoxystyryl)-1,3,4-oxadiazole, 2,6-ditrichloromethyl-4-(p-methoxyphenyl)-triazine, and 2-(4-methylphenyl)-4,6-bis(trichloromethyl)-1,3,5-triazine.

[0233] Among these, the compounds represented by general formula (3), general formula (6), or general formula (7) are preferred as organohalogen compounds, and from the viewpoint of excellent sensitivity at a wavelength of 222 nm, the compounds represented by general formula (6) are more preferred. The reason for the excellent sensitivity at a wavelength of 222 nm is not yet clear, but it is speculated that it is because the compounds represented by the above general formula (6) have good compatibility with a wavelength of 222 nm.

[0234] The halogen atom present in the above-mentioned compounds is preferably a chlorine atom, a bromine atom, or an iodine atom, more preferably a chlorine atom or a bromine atom.

[0235] Photo-acid generator

[0236] As a photoacid generator, a compound that generates acid through ultraviolet light cracking and enables the color-generating agent to develop color through the action of the generated acid is preferred. More preferably, a compound that generates acid through light of at least any wavelength in the range of 200 to 280 nm and enables the color-generating agent to develop color through the action of the generated acid is preferred; even more preferably, a compound that generates acid through light of at least 222 nm and enables the color-generating agent to develop color through the action of the generated acid is preferred.

[0237] Photoacid generators can be compounds that generate acids by breaking down light of multiple wavelengths in the range of 200–280 nm, or they can be compounds that generate acids by breaking down light of all wavelengths in the range of 200–280 nm.

[0238] Examples of photoacid generators include nonionic and ionic photoacid generators. From the viewpoint of superior performance of the present invention, nonionic photoacid generators are preferred. Examples of nonionic photoacid generators include organohalogen compounds and oxime compounds. From the viewpoint of superior performance of the present invention, organohalogen compounds are preferred, and compounds represented by the above general formula (6) are more preferred.

[0239] From the viewpoint of achieving superior color gradation in the chromatic region, compounds with three or more halogen atoms in their molecules are preferred as organohalogen compounds. As an upper limit for the number of halogen atoms, nine or fewer is preferred.

[0240] Organic halogen compounds can be used alone or in combination of two or more.

[0241] As a specific example of an organohalogen compound, the same compound as the organohalogen compound mentioned as a photooxidant in the previous section can be given.

[0242] Examples of ionic photoacid-generating agents include diazonium salts, iodinated salts, and sulfonium salts, with iodinated salts or sulfonium salts being preferred. Examples of ionic photoacid color-generating agents include compounds described in Japanese Patent Application Publication Nos. 62-161860, 61-067034, and 62-050382, and these contents are incorporated herein by reference.

[0243] Furthermore, as a photoacid generator, there are no particular limitations as long as it is a compound that generates acid through light. It can be a photoacid generator that generates inorganic acids such as hydrogen halides (e.g., hydrochloric acid), sulfuric acid, and nitric acid, or it can be a photoacid generator that generates organic acids such as carboxylic acids and sulfonic acids. From the viewpoint of better performance of the present invention, it is preferable to be a photoacid generator that generates inorganic acids, and more preferably a photoacid generator that generates hydrogen halides.

[0244] Specific examples of photoacid-generating agents include triarylsulfonium hexafluorophosphate, triarylsulfonium arsenate, triarylsulfonium antimonate, diaryliodohexafluorophosphate, diaryliodoarsenate, diaryliodoantimonate, dialkylbenzoylmethylsulfonium tetrafluoroboronic acid, dialkylbenzoylmethylsulfonium hexafluorophosphate, dialkyl-4-hydroxyphenylsulfonium tetrafluoroboronic acid, dialkyl-4-hydroxyphenylsulfonium hexafluorophosphate, N-bromosuccinimide, tribromomethylphenyl sulfone, diphenyliodide, 2-trichloromethyl-5-(p-butoxystyryl)-1,3,4-oxadiazole, and 2,6-ditrichloromethyl-4-(p-methoxyphenyl)-triazine.

[0245] Photo-acid-generating agents can be used alone or in combination of two or more.

[0246] (Light stabilizer)

[0247] The first photosensitive part preferably contains a light stabilizer.

[0248] There are no particular restrictions on light stabilizers as long as they are light-stabilized materials, but they are preferred to function as so-called free radical scavenging substances that capture the free radicals of activated photoactive agents.

[0249] Light stabilizers can be used alone or in combination of two or more.

[0250] Examples of light stabilizers include polyvalent phenols such as 2,5-bis(1,1,3,3-tetramethylbutyl)hydroquinone, hydroquinone, catechol, resorcinol, and hydroxyhydroquinone, as well as aminophenols such as o-aminophenol and p-aminophenol.

[0251] The ratio of light stabilizer to photoactive agent (light stabilizer / photoactive agent (molar ratio)) is preferably 0.0001 to 10, more preferably 0.0002 to 5.

[0252] (UV absorber)

[0253] The first photosensitive part may also contain an ultraviolet absorber.

[0254] Ultraviolet absorbers can be used alone or in combination of two or more.

[0255] From the perspective of superior sensitivity at a wavelength of 222 nm, triazine compounds and benzodithiols are preferred as ultraviolet absorbers.

[0256] Commercially available triazine compounds include, for example, ADEKA STAB IA-F70 (manufactured by ADEKA CORPORATION), Tinuvin 1577ED, Tinuvin 1600 (manufactured by BASF), 2,4-bis(2,4-dimethylphenyl)-6-(2-hydroxy-4-n-octyloxophenyl)-1,3,5-triazine, 2-(2,4-dihydroxyphenyl)-4,6-diphenyl-1,3,5-triazine, and ethylhexyltriazinone (manufactured by Tokyo Chemical Industry Co., Ltd.).

[0257] Examples of benzodithiols include those described in International Publication No. 2019 / 159570.

[0258] (Adhesive)

[0259] The first photosensitive part preferably includes an adhesive.

[0260] The adhesive preferably includes either a water-soluble adhesive or a non-water-soluble adhesive.

[0261] Examples of adhesives include cellulose resins such as methylcellulose, ethylcellulose, carboxymethylcellulose, and hydroxypropylcellulose; polyvinyl alcohol; gum arabic; gelatin; polyvinylpyrrolidone; casein; styrene-butadiene copolymer; acrylonitrile-butadiene copolymer; polyvinyl acetate; acrylic resins; polyvinyl chloride; and ethylene-vinyl acetate copolymers. From the viewpoint of excellent sensitivity at a wavelength of 222 nm, adhesives that are substantially free of aromatic groups are preferred, with cellulose resins and acrylic resins being particularly favored.

[0262] Furthermore, as an adhesive, the polymeric adhesive described in paragraph 0078 of Japanese Patent Application Publication No. 2017-167155 can be referenced, and this content is incorporated into this specification.

[0263] One type of adhesive can be used alone, or two or more types can be mixed together.

[0264] Adhesives can be cross-linked. In other words, adhesives can be cross-linked adhesives.

[0265] There are no particular limitations on the crosslinking agent; for example, ethylenedioxazole can be used. Furthermore, the crosslinking agent described in paragraph 0079 of Japanese Patent Application Publication No. 2017-167155 can also be referenced. This information is incorporated into this specification.

[0266] Microcapsules

[0267] The first photosensitive part preferably contains microcapsules.

[0268] Microcapsules typically have a core and a capsule wall for containing the core material (the contents, also referred to as "inclusions") that constitute the core.

[0269] When the first photosensitive part includes microcapsules, the microcapsules, as the core material (containing components), preferably contain a color-developing agent and a solvent, more preferably contain a color-developing agent, a photosynthetic agent, and a solvent, and even more preferably contain a color-developing agent, a photosynthetic agent, a light stabilizer, and a solvent. Examples of color-developing agents, photosynthetic agents, and light stabilizers mentioned above can be used, and the preferred methods are also the same.

[0270] There are no particular restrictions on the solvent contained within the microcapsules, as long as it is in a liquid state at 25°C; however, it is preferable to include one or more solvents with a boiling point of 100°C or higher. Furthermore, the upper limit for the boiling point of the solvent is, for example, 500°C or lower. By containing a solvent within the microcapsules and a color-developing agent present in the liquid phase of the solvent, the effect of the color-developing agent relative to the photoactive agent becomes better.

[0271] The solvent contained in the microcapsules can be a single solvent or a mixture of two or more solvents.

[0272] As a preferred method for microcapsules, one could include microcapsules containing a photooxidant as a photoactive agent and a color-developing agent that is oxidized and develops color as a color-developing agent.

[0273] Furthermore, as another preferred method of microcapsule, a microcapsule containing a photoacid-generating agent as a photoactive agent and a color-generating agent that develops color through the action of acid as a color-generating agent can be cited.

[0274] As microcapsules, it is preferable to prevent contact between substances inside and outside the capsule through the material barrier effect of the capsule wall at room temperature. Specifically, Japanese Patent Application Publication Nos. 59-190886 and 60-242094 can be cited, and these contents are incorporated into this specification.

[0275] The capsule wall of the microcapsule is preferably substantially composed of resin. "Substantially composed of resin" means that the resin content is 90% by mass or more, preferably 100% by mass, relative to the total mass of the capsule wall. That is, the capsule wall of the microcapsule is preferably composed of resin.

[0276] Examples of the aforementioned resins include polyurethane, polyurea, polyester, polycarbonate, urea-formaldehyde resin, melamine-formaldehyde resin, polystyrene, styrene-methacrylate copolymer, gelatin, polyvinylpyrrolidone, and polyvinyl alcohol. From the viewpoint of having a dense cross-linked structure that prevents leakage of inclusions, and from the viewpoint that controlling the transmittance at wavelength 222 nm can further improve the sensitivity at wavelength 222 nm, one or more selected from polyurea, polyurethane urea, and polyurethane are more preferable.

[0277] Polyurea is preferably a polymer having multiple urea bonds and is a reaction product formed from raw materials containing polyamines and polyisocyanates.

[0278] In addition, by reacting a portion of the polyisocyanate with water to form a polyamine, it is possible to synthesize polyurea using polyisocyanates without using polyamines.

[0279] Furthermore, the polyurethane urea is preferably a polymer having urethane bonds and urea bonds, and is a reaction product formed from raw materials containing polyols, polyamines and polyisocyanates.

[0280] In addition, when polyols are reacted with polyisocyanates, a portion of the polyisocyanates reacts with water to become polyamines, which sometimes results in the production of polyurethane urea.

[0281] Furthermore, the polyurethane is preferably a polymer having multiple urethane bonds and is a reaction product formed from raw materials comprising polyols and polyisocyanates.

[0282] The average particle size of the microcapsules, measured by volume average particle size, is preferably 0.1 to 100 μm.

[0283] In addition, the average particle size (volume average particle size) of the microcapsules can be measured, for example, by a laser analysis / scattering particle size distribution measuring device LA950 (manufactured by HORIBA, Ltd.).

[0284] Furthermore, when determining the average particle size of the microcapsules contained in the first photosensitive part, the average particle size (volume average particle size) of the microcapsules can be measured using a scanning electron microscope (SEM). Specifically, the surface of the first photosensitive part is observed at 5000x magnification using an SEM, and the average particle size of all microcapsules present in the observed field of view is determined by image analysis. Alternatively, when microcapsules cannot be observed on the surface, cross-sectional sections are prepared, and measurements are performed in the same manner as described above.

[0285] The average particle size (volume average particle size) of microcapsules can be controlled by adjusting the manufacturing conditions of the microcapsules.

[0286] [Other ingredients]

[0287] In addition to the above-mentioned components, the first photosensitive part may also contain one or more additives such as wavelength-converting pigments, fluorescent pigments, surfactants, paraffin, reducing agents, sensitizers, crosslinking agents, and deodorizers, as needed.

[0288] As reducing agents, sensitizing agents, and surfactants, references can be made to the descriptions on page 9 (bottom left column) to page 10 (top left column) of Japanese Patent Application Publication No. 1-207741, paragraphs 0072-0075 of International Publication No. 2016 / 017701, and paragraphs 0038-0039 and 0048-0059 of Japanese Patent Application Publication No. 2004-233614, and these contents are incorporated into this specification.

[0289] There are no particular limitations on the type of surfactant used; any known surfactant can be used. From the viewpoint of excellent coating surface finish, anionic or nonionic surfactants are preferred, such as alkylbenzene sulfonates (e.g., sodium dodecylbenzene sulfonate and ammonium dodecylbenzene sulfonate), alkyl sulfonates (e.g., sodium lauryl sulfonate and dioctyl sodium sulfosuccinate), and polyalkylene glycols (e.g., nonylphenol polyoxyethylene ether).

[0290] There are no particular limitations on the mass per unit area (solid component coating amount) of the first photosensitive part, but, for example, 0.1 to 30 g / m² is preferred. 2 More preferably 0.5–25 g / m 2 Further optimization of 1-10 g / m 2 .

[0291] The thickness of the first photosensitive part is preferably 0.1 to 30 μm, more preferably 0.5 to 25 μm, and even more preferably 1 to 10 μm.

[0292] There are no particular restrictions on the method for forming the first photosensitive part; any known method can be cited.

[0293] For example, methods include coating a photosensitive portion forming composition containing microcapsules with a chromophore onto a support, coating a photosensitive portion forming composition containing a chromophore onto a support, and printing a photosensitive portion forming composition containing a chromophore onto a support. When the first photosensitive portion has a filter as described later, the photosensitive portion forming composition can also be coated onto the filter. Alternatively, the support can be changed to a temporary support, and the temporary support can be peeled off after the first photosensitive portion is formed.

[0294] The photosensitive part forming composition may also contain other components that may be contained in the first photosensitive part as described above.

[0295] There are no particular limitations on the method for forming the composition by coating the photosensitive part. For example, the coating machine used for coating can be an air knife coating machine, a bar coating machine, a rod coating machine, a curtain coating machine, a gravure coating machine, an extrusion coating machine, a die coating machine, a sliding bead coating machine, and a doctor blade coating machine.

[0296] There are no particular limitations on the method of forming the photosensitive part of the printing composition; examples include screen printing and inkjet printing.

[0297] Alternatively, after forming the composition by coating the photosensitive part, the coating film can be dried as needed. For example, heat treatment can be used as a drying process.

[0298] Other Layers

[0299] The first display unit may also have other layers besides the support and the first photosensitive unit described above.

[0300] Other layers that can be included include reflective layers, gloss layers, filters, and sensitivity adjustment layers.

[0301] As for reflective layers, adhesive layers, gloss layers, and sensitivity adjustment layers, and methods for manufacturing them, reference can be made to the reflective layers, adhesive layers, gloss layers, and sensitivity adjustment layers, and methods for manufacturing them, as described in paragraphs 0082 to 0109 of International Publication No. 2016 / 017701. These contents are incorporated herein by reference.

[0302] As a filter, a filter that blocks light with a wavelength exceeding 280 nm is preferred (hereinafter also referred to as filter Y). By blocking light with a wavelength exceeding 280 nm, the degradation of the first photosensitive part based on UV-A and UV-B can be suppressed.

[0303] The average transmittance of filter Y at wavelengths exceeding 280 nm and below 400 nm is preferably 0 to 30%, more preferably 0 to 20%, and even more preferably 0 to 10%.

[0304] The filter Y can be colored, but from the viewpoint that it can be visually recognized through the filter, the filter is preferably transparent, and the total light transmittance is preferably 70 to 100%, more preferably 80 to 100%, and even more preferably 90 to 100%.

[0305] The visible light transmittance (average transmittance in the visible light region (400-700 nm)) of filter Y is preferably 70-100%, more preferably 80-100%, and even more preferably 90-100%.

[0306] When inspecting the first display unit by illuminating it with light in the wavelength range of 200 to 280 nm through filter Y, filter Y preferably transmits light in the wavelength range of 200 to 280 nm. The average transmittance in the wavelength range of 200 to 280 nm is preferably 70 to 100%, more preferably 80 to 100%, and even more preferably 90 to 100%.

[0307] As filter Y, filters including ultraviolet bandpass filters or dielectrics, sheets containing ultraviolet absorbers, etc., can be used.

[0308] As an ultraviolet absorber, a known ultraviolet absorber can be used. Furthermore, from the viewpoint of blocking light with a wavelength exceeding 280 nm, it is preferable to include an ultraviolet absorber that the first photosensitive part can possess.

[0309] Furthermore, the spectral characteristics of filter Y (e.g., various transmittances such as visible light transmittance mentioned above) can be measured, for example, using a UV-Vis spectrophotometer (UV-2700 / Shimadzu Corporation).

[0310] Examples of methods for forming filter Y include a method of attaching a sheet material that blocks light with a wavelength exceeding 280 nm, and a method of coating a filter forming composition having a compound that blocks light with a wavelength exceeding 280 nm onto a first photosensitive part.

[0311] Part 2 Photosensitive Section A

[0312] The second photosensitive unit A produces a visual change before and after sensing light of at least any wavelength (hereinafter also referred to as "specific ultraviolet Y") in the range of wavelengths exceeding 230 nm and below that passing through the filter X. The second photosensitive unit A can sense multiple wavelengths of light in the range of wavelengths exceeding 230 nm and below 280 nm, or it can sense all wavelengths of light in the range of wavelengths exceeding 230 nm and below 280 nm. Preferably, the second photosensitive unit A produces a visual change at least before and after sensing light with a wavelength of 254 nm.

[0313] Furthermore, as described below, since the second photosensitive unit A is illuminated by light through the filter X, the second photosensitive unit A can be sensitive to light of at least any wavelength in the range of 200 to 230 nm.

[0314] Like the first photosensitive part, the second photosensitive part A preferably contains a colorant, and more preferably contains both a colorant and a photoactive agent.

[0315] As a colorant that can be included in the second photosensitive part A, an example of a colorant that can be included in the first photosensitive part can be cited.

[0316] As a photosactive agent (specifically, a photooxidant and a photoacid generator) that can be included in the second photosensitive section A, examples of photosactive agents that can be included in the first photosensitive section can be cited, except that the photosensitive wavelength is the specific ultraviolet light Y mentioned above. More specifically, the photosactive agent that can be included in the second photosensitive section A is preferably activated by light of at least any wavelength in the range of wavelengths exceeding 230 nm and below 280 nm. The photosactive agent that can be included in the second photosensitive section A can be activated by light of multiple wavelengths in the range of wavelengths exceeding 230 nm and below 280 nm, and the photosactive agent can also be activated by light of all wavelengths in the range of wavelengths exceeding 230 nm and below 280 nm. The photosactive agent that can be included in the second photosensitive section A is preferably activated by light of at least 254 nm.

[0317] The second photosensitive part A may include light stabilizers, ultraviolet absorbers, adhesives, microcapsules and other ingredients that the first photosensitive part may include.

[0318] As a method for forming the second photosensitive part A, the same method as the method for forming the first photosensitive part described above can be cited.

[0319] Furthermore, as described above, the first photosensitive unit is a component that produces a visual change by sensing light of at least any wavelength in the range of 200 to 280 nm. However, when the first photosensitive unit also produces a visual change by sensing a specific ultraviolet light Y, the first photosensitive unit and the second photosensitive unit A can use the same component. For example, when the first photosensitive unit is sensitive to light of all wavelengths in the range of 200 to 280 nm, since the first photosensitive unit is sensitive to a specific ultraviolet light Y, it can be used as a second photosensitive unit.

[0320] In other words, if the second photosensitive part A is sensitive to a specific ultraviolet light Y, a visual change can occur before and after exposure to light of at least any wavelength in the range of 200 to 230 nm. Therefore, the photoactive agent that can be included in the second photosensitive part A can be activated by light of at least any wavelength in the range of 200 to 230 nm and light of at least any wavelength in the range of wavelengths exceeding 230 nm but less than 280 nm. Specifically, the photoactive agent that can be included in the second photosensitive part A can be a photoactive agent that can be activated by light of all wavelengths in the range of 200 to 280 nm.

[0321] Optical filters that block light with wavelengths of 200–230 nm (Filter X)

[0322] Filter X is a filter that blocks light with a wavelength of 200–230 nm.

[0323] The average transmittance of filter X at wavelengths of 200–230 nm is preferably 50% or less, more preferably 30% or less, even more preferably 10% or less, and particularly preferably 1% or less. There is no particular limitation on the lower limit of the average transmittance of filter X at wavelengths of 200–230 nm; 0% can be cited as an example.

[0324] Filter X preferably blocks light with a wavelength of 222 nm, and the transmittance of filter X at a wavelength of 222 nm is preferably 10% or less, more preferably 5% or less, and even more preferably 1% or less. There is no particular limitation on the lower limit of the transmittance of filter X at a wavelength of 222 nm; 0% is an example.

[0325] Filter X preferably blocks light with a wavelength of 230 nm. The transmittance of filter X at a wavelength of 230 nm is preferably 50% or less, more preferably 40% or less, further preferably 25% or less, and especially preferably 15% or less. There is no particular limitation on the lower limit of the transmittance of filter X at a wavelength of 230 nm; 0% can be cited as an example. The lower the transmittance at a wavelength of 230 nm, the better the light-blocking performance generally is in the range of 200–230 nm.

[0326] From the viewpoint of achieving better results with the present invention, filter X is preferably set to the above-mentioned range in terms of average transmittance at wavelengths of 200 to 230 nm, and in terms of transmittance at wavelength of 222 nm.

[0327] Filter X is preferably a filter that transmits light with a wavelength exceeding 230 nm and being 280 nm. Specifically, the average transmittance of filter X at wavelengths of 230 to 280 nm is preferably 50 to 100%, more preferably 60 to 100%, further preferably 70 to 100%, particularly preferably 80 to 100%, and most preferably 90 to 100%.

[0328] Filter X preferably transmits light with a wavelength of 254 nm, and the transmittance of filter X at a wavelength of 254 nm is preferably 50% or more, more preferably 70% or more, and even more preferably 75% or more. There is no particular limit to the upper limit of the transmittance of filter X at a wavelength of 254 nm; 100% can be cited as an example.

[0329] The higher the transmittance at a wavelength of 254nm, the better the sensitivity.

[0330] From the viewpoint that both the light-blocking properties of the filter X at wavelengths of 200 to 230 nm and the transmittance at wavelengths exceeding 230 nm but below 280 nm are satisfied, the difference between the transmittance at wavelength 222 nm and the transmittance at wavelength 254 nm is preferably 50 to 100%, more preferably 65 to 100%, and even more preferably 75 to 100%.

[0331] From the viewpoint that the filter X has better light-blocking properties at wavelengths of 200-230 nm and better transmittance at wavelengths of more than 230 nm but less than 280 nm, the difference between the transmittance at wavelength 230 nm and the transmittance at wavelength 254 nm is preferably 40-100%, more preferably 50-100%, and even more preferably 70-100%.

[0332] Filter X may be colored, but from a visual recognizability point of view, filter X is preferably transparent. The total light transmittance of filter X is preferably 70-100%, more preferably 80-100%, and even more preferably 90-100%.

[0333] The visible light transmittance of filter X is preferably 70-100%, more preferably 80-100%, and even more preferably 90-100%.

[0334] As a preferred option for filter X, a sheet material that absorbs light with a wavelength of 222nm and transmits light with a wavelength of 254nm can be cited.

[0335] Specifically, the preferred material is a sheet material that is substantially free of aromatic groups, such as triacetyl cellulose (TAC) sheets, polyvinyl chloride (PVC) sheets, (meth)acrylic acid sheets, polyurethane sheets, and polyurea sheets. That is, the filter X preferably comprises a resin selected from triacetyl cellulose, polyvinyl chloride, acrylic resins, methacrylic acid resins, polyurethane, and polyurea.

[0336] In this embodiment, "triacetylcellulose (TAC)" refers to a cellulose acylated product in which the hydrogen atoms of the free hydroxyl groups at the 2, 3, and 6 positions of the β-1,4-bonded glucose units constituting cellulose are replaced by acetyl groups, wherein the degree of substitution of the acetyl groups is 2.3 or more. Preferably, the degree of substitution of the acetyl groups is 2.7 or more.

[0337] Here, "degree of substitution" refers to the degree of substitution of the acetyl group for the hydrogen atoms of the hydroxyl groups that constitute cellulose, which can be determined by comparing the degree of substitution of the acetyl group for the hydrogen atoms of the hydroxyl groups that constitute cellulose. 13 The area intensity ratio of carbon in cellulose acylates determined by C-NMR is used for calculation.

[0338] As an example of TAC sheet, FUJITAC Z-TAC (manufactured by FUJIFILM Corporation) can be cited.

[0339] Another preferred embodiment of filter X is one that contains a compound (hereinafter also referred to as compound X) that blocks light with wavelengths of 200 to 230 nm. Compound X is preferably a compound that absorbs light with a wavelength of 222 nm and transmits light with a wavelength of 254 nm.

[0340] Compound X can be a low-molecular-weight compound, a high-molecular-weight compound, or a cross-linked compound.

[0341] Compound X can be a compound having a carbonyl bond, preferably having a partial structure selected from ester bonds, urethane bonds, and urea bonds. Specifically, examples include cellulose derivatives such as triacetyl cellulose (TAC) resin, acetyl cellulose, alkyl cellulose, carboxymethyl cellulose, and hydroxyalkyl cellulose; polyvinyl acetate, polyvinyl butyral, polyvinylpyrrolidone, and other polyvinyl alcohol derivatives; (meth)acrylic resins; urethane resins; and urea resins. For example, resins that react with xylene diisocyanate can be used as urethane resins and urea resins. The content of compound X in filter X is preferably 50-100% by mass relative to the total mass of filter X, more preferably 80-100% by mass.

[0342] As compound X, known ultraviolet absorbers can also be preferred. Examples of ultraviolet absorbers include triazine compounds, benzotriazole compounds, benzophenone compounds, and benzodithiols. Among these, triazine compounds and benzodithiols are preferred as compound X. Specific examples of triazine compounds and benzodithiols can be given, including compounds similar to those that can be present in the first photosensitive section.

[0343] Regarding the spectral characteristics of filter X (e.g., various transmittances such as the visible light transmittance mentioned above), for example, they can be measured using a UV-Vis spectrophotometer (UV-2700 / Shimadzu Corporation).

[0344] The thickness of filter X is appropriately selected considering the transmittance at 222 nm and 254 nm, preferably 500 nm or more, more preferably 1 μm or more, and even more preferably 2 μm or more. When the transmittance at 254 nm is sufficient, the thicker the filter X, the better it can block light at 222 nm. On the other hand, when the transmittance at 254 nm is low, the thinner the filter X, the better it can transmit light at 254 nm. There is no particular upper limit to the thickness of filter X, but it is preferably 2 cm or less. From the viewpoint of light blocking at 222 nm and transmittance at 254 nm, it is more preferably 1000 μm or less, even more preferably 500 μm or less, and especially preferably 200 μm or less.

[0345] Examples of methods for forming a second display portion including a second photosensitive portion A and a filter X include: attaching a sheet that blocks light with a wavelength of 200 to 230 nm to the second photosensitive portion A; coating a filter forming composition containing compound X onto the second photosensitive portion A to form a filter; and coating a composition for forming the second photosensitive portion A onto a sheet that blocks light with a wavelength of 200 to 230 nm.

[0346] [Second Implementation]

[0347] In a second embodiment of the inspection tool of the present invention, the first display unit has a first photosensitive unit that produces a visual change before and after sensing light of at least any wavelength in the range of 200 to 280 nm, and the second display unit has a second photosensitive unit B that produces a visual change before and after sensing light of at least any wavelength in the range of 200 to 230 nm but not in the range of 200 to 230 nm.

[0348] Figure 11 The specific manner of the second embodiment described above is indicated. Figure 11 This is a schematic cross-sectional view illustrating an example of a second embodiment of the inspection tool. Figure 11 The inspection tool 40 shown has a support 12, a first photosensitive part 42 and a second photosensitive part B44.

[0349] Department 1 (Photographic Department)

[0350] The first photosensitive part in the second embodiment has the same structure as the first photosensitive part in the first embodiment, and the preferred embodiment is also the same.

[0351] Part 2, Photosensitive Section B

[0352] The second photosensitive unit B produces a visual change before and after sensing light of at least any wavelength in the range of wavelengths exceeding 230 nm but less than 280 nm, instead of light in the range of wavelengths between 200 and 230 nm.

[0353] Since the second photosensitive section B is configured to be non-sensitive to light in the wavelength range of 200-230 nm, it preferably contains a compound (compound X) that blocks light in the wavelength range of 200-230 nm, and similarly to the second photosensitive section A described above, it further contains a chromophore and a photosensitizer that is activated by at least a specific ultraviolet light Y. The photosensitizer contained in the second photosensitive section B, like the photosensitizer that can be contained in the second photosensitive section A described above, can be sensitive to light of at least any wavelength in the wavelength range of 200-230 nm. That is, the materials that can be contained in the second photosensitive section B, except for compound X, are the same as those that can be contained in the second photosensitive section A; therefore, descriptions other than compound X are omitted below.

[0354] In addition, in order to make the photosensitive part that is not sensitive to light in the wavelength range of 200 to 230 nm, it is preferable to select the colorant and photoactive agent according to the wavelength.

[0355] (A compound that blocks light with wavelengths of 200–230 nm (Compound X))

[0356] As compound X, it is the same as the compound X that the filter X in the first embodiment may have, and the preferred method is also the same.

[0357] Compound X in the second photosensitive part B exists as a binder or additive, and is also preferably present as the capsule wall of the microcapsule. The structure of the microcapsule that the second photosensitive part B may have is the same as that of the microcapsule that the first photosensitive part in the first embodiment may have, and the preferred configuration is also the same.

[0358] That is, the second photosensitive part B preferably has compound X as the capsule wall and contains microcapsules containing a colorant and a solvent as the core material.

[0359] The microcapsules in the second photosensitive part B are preferably microcapsules in which the reactants of xylene diisocyanate are used as the capsule wall and contain color-developing agents, etc.

[0360] When compound X is used as the capsule wall, from the viewpoint of light-blocking properties, the thickness (number average thickness) of the capsule wall of the microcapsule is preferably 0.2 to 5 μm, more preferably 0.3 to 2 μm.

[0361] The thickness of a microcapsule refers to the thickness of the capsule wall of the microcapsule particles that form the microcapsule. Number-average thickness refers to the average thickness obtained by averaging the thicknesses of the individual capsule walls of 10 microcapsules obtained using scanning electron microscopy (SEM). More specifically, a cross-sectional section of the second photosensitive part B containing the microcapsule is prepared, and this section is observed at 1000x magnification using SEM. Five microcapsules are selected in descending order of average particle size (volume average particle size), and the cross-sections of each selected microcapsule are observed at 15000x magnification to determine the thickness of the microcapsule wall and calculate the average value.

[0362] Examples of methods for forming the second photosensitive part B include coating a composition containing compound X and a colorant onto a support, coating a composition containing a precursor of compound X having an isocyanate group and a colorant onto a support and forming a film by heating to react the isocyanate, and coating a composition including microcapsules containing compound X and a colorant onto a support.

[0363] [Third Implementation]

[0364] The third embodiment of the inspection tool of the present invention includes: a first light receiving unit that receives light of at least any wavelength in the range of 200 to 280 nm; a first display unit that generates visual changes based on the amount of light received by the first light receiving unit; a filter X; a second light receiving unit that receives light of at least any wavelength in the range of 230 nm and below; and a second display unit that generates visual changes based on the amount of light received by the second light receiving unit. The filter X is disposed on the light-receiving surface side of the second light receiving unit.

[0365] When the inspection tool of the third embodiment described above is irradiated with light of a wavelength of 222 nm, the irradiated light is received by the first light receiving unit, and a visual change occurs on the first display unit according to the amount of light received. On the other hand, since a filter X is disposed on the light-receiving surface side of the second light receiving unit, when light of a wavelength of 222 nm is irradiated toward the second light receiving unit, the light of a wavelength of 222 nm is absorbed by the filter X, and the second light receiving unit cannot receive the light of a wavelength of 222 nm, thereby no visual change occurs on the second display unit. Based on the above results, assuming that the light irradiated onto the inspection tool of the third embodiment includes light of a wavelength of 222 nm that helps to deactivate viruses, etc., and does not include light that is harmful to the human body, i.e., light with a wavelength greater than 230 nm and less than 280 nm, a visual change only occurs on the first display unit, and it is possible to inspect that the irradiated light includes light of a wavelength that helps to deactivate viruses, etc. (in this case, light of 222 nm), and does not include light that is harmful to the human body.

[0366] The first optical receiver and the second optical receiver can be the same or different.

[0367] The first display unit and the second display unit can be the same or different.

[0368] In the third embodiment described above, the types of the first and second display units are not particularly limited as long as they produce a visual change. For example, they can be composed of a light source array, preferably an LED array. A light source array refers to a light source array in which multiple light sources are arranged at a predetermined distance; more specifically, it is preferable to arrange multiple LED light sources at a predetermined distance. When the first and second display units are composed of an LED array as described above, the number of lit LED light sources in the LED array is changed according to the amount of light received by the first and second light receiving units, thereby producing a visual change. The relationship between the number of lit LED light sources and the amount of light received is based on a predetermined relationship.

[0369] Furthermore, the first and second display units can be configured in ways other than the light source array described above; for example, they can be composed of a display screen. Text and numbers can be displayed on the display screen based on the amount of light received. Additionally, the relationship between the amount of light received and the displayed text is based on a predetermined relationship.

[0370] In the third embodiment described above, the first light receiving unit receives light of at least any wavelength in the range of 200 to 280 nm. Preferably, the first light receiving unit receives light with a wavelength of at least 222 nm. The first light receiving unit can receive light of multiple wavelengths in the range of 200 to 280 nm, or it can receive light of all wavelengths in the range of 200 to 280 nm.

[0371] In the third embodiment described above, the second light receiving unit receives light of at least any wavelength in the range of wavelengths exceeding 230 nm and below 280 nm. Preferably, the second light receiving unit receives light with a wavelength of at least 254 nm. The second light receiving unit can receive light of multiple wavelengths in the range of wavelengths exceeding 230 nm and below 280 nm, or it can receive light of all wavelengths in the range of wavelengths exceeding 230 nm and below 280 nm.

[0372] In addition, the second light receiving unit is illuminated by light through the filter X, so the second light receiving unit can receive light of at least any wavelength in the range of 200 to 230 nm.

[0373] There are no particular restrictions on the specific structure of the first and second light receiving units. For example, a photodiode can be used to detect the amount of light received.

[0374] The inspection tool in the third embodiment may also include a control unit, which controls the first display unit to produce visual changes based on the amount of light received in the first light receiving unit. Furthermore, the control unit controls the second display unit to produce visual changes based on the amount of light received in the second light receiving unit.

[0375] In the inspection tool of the present invention, the first display unit and the second display unit may be structurally connected or may be composed of separate components. For example, as described in the first embodiment above, when a portion of a photosensitive sheet that produces visual changes upon sensing light of all wavelengths in the wavelength range of 200 to 280 nm is used as the first photosensitive unit, and the remaining portion is used as the second photosensitive unit A, the first display unit and the second display unit are structurally connected. Furthermore, for example, in the case of the third embodiment above, it may also be configured as follows: a first unit comprising a first light receiving unit and a first display unit; and a second unit comprising a second light receiving unit and a second display unit that are not structurally connected to the first unit.

[0376] [Test Kit]

[0377] The test kit includes at least the testing tools mentioned above.

[0378] There are no particular limitations on the specific structure of the test kit. For example, it can include test tools, light-shielding filters (e.g., filters that shield indoor light such as fluorescent lamps or LEDs, or sunlight), light-shielding bags (bags that shield indoor light and sunlight), judgment samples, limit samples (calibration tables), and other elements selected from focusing fixtures such as lenses and concave mirrors.

[0379] As a light-shielding filter, it is preferably the same as the filter Y described above.

[0380] The present invention also relates to an inspection method using the inspection tool of the present invention. In the inspection method of the present invention, by using the above-described inspection tool, it is possible to check whether light that inactivates viruses or the like has been irradiated, and to check whether light harmful to the human body has been irradiated.

[0381] Example

[0382] The following examples and comparative examples further illustrate the features of the present invention. The materials, amounts, proportions, processing contents, and processing steps shown in the following examples can be appropriately modified without departing from the spirit of the present invention. However, the scope of the present invention should not be interpreted as limited by the specific examples shown below.

[0383] [Example 1]

[0384] The mixture 1 with the following composition was added to a 5% by mass aqueous solution of polyvinyl alcohol (202 parts by mass), and then emulsified and dispersed at 20°C to obtain an emulsion with a volume average particle size of 1 μm. Furthermore, the obtained emulsion was continuously stirred at 50°C for 4 hours. Water was then added to adjust the concentration to obtain a microcapsule solution containing a colorant with a solid component concentration of 15.9% by mass.

[0385] <Composition of Mixture 1>

[0386]

[0387]

[0388] A composition for forming a photosensitive part was prepared by mixing the obtained microcapsule dispersion (20 parts by mass), a 6% aqueous solution of polyvinyl alcohol (product name "DENKA SIZE EP-130", manufactured by Denka Company Limited) (5 parts by mass), 0.05 parts by mass of glyoxal (manufactured by DAITO CHEMICAL CO., LTD.) and 0.09 parts by mass of sodium dodecylbenzenesulfonate (manufactured by DKS Co.Ltd.).

[0389] The obtained photosensitive composition was coated onto a 188 μm thick layer of white polyethylene terephthalate (trade name "CRISPR K1212", manufactured by TOYOBO CO., LTD.) at a solid content of 3 g / m². 2 A sheet 1A comprising a support and a photosensitive portion was fabricated by coating the sample using a specific method and then heating and drying it. The film thickness of the photosensitive portion is approximately 3 μm. The photosensitive portion produces a visual change before and after exposure to light of any wavelength in the range of 200–280 nm.

[0390] The photosensitive part in sheet 1A corresponds to the first photosensitive part in the first embodiment of the inspection tool described above.

[0391] A sheet 1A was prepared separately, and a TAC sheet (FUJITAC Z-TAC, manufactured by FUJIFILM Corporation, 60 μm thick, with a transmittance of 0.1% at 222 nm, 3.2% at 230 nm, 79.9% at 254 nm, an average transmittance of 0.3% at 200–230 nm, an average transmittance of 66.0% at 230–280 nm, and a visible light transmittance of 92%) was laminated on the side of the photosensitive part of the obtained sheet 1A opposite to the support to produce sheet 1B.

[0392] The TAC sheet in sheet 1B corresponds to the filter X in the first embodiment of the inspection tool described above, and the photosensitive part in sheet 1B corresponds to the second photosensitive part A in the first embodiment of the inspection tool described above.

[0393] Inspection tool 1 was fabricated by assembling sheet 1A and sheet 1B onto a white resin retaining clamp. The retaining clamp has two openings, which are arranged to allow light to illuminate a first photosensitive portion in sheet 1A and a second photosensitive portion A in sheet 1B. Specifically, sheets 1A and 1B are assembled onto the retaining clamp with their surfaces opposite to the support as the light-receiving surfaces. Inspection tool 1 corresponds to the first embodiment, and the first and second photosensitive portions A contain microcapsules.

[0394] In addition, in Embodiment 1, sheet 1A and sheet 1B are housed in a retaining fixture, but they can also be used directly as separate sheets.

[0395] [Example 2]

[0396] Mixture 1 was changed to mixture 2. Otherwise, sheet 2B was made in the same manner as in Example 1 to replace sheet 1B.

[0397] Sheets 1A and 2B, fabricated in Example 1, were assembled in a holding fixture, and inspection tool 2 was fabricated in the same manner as in Example 1, and evaluated. Furthermore, inspection tool 2 corresponds to the first embodiment, with microcapsules present in the first and second photosensitive portions.

[0398] The second photosensitive part in sheet 2B produces a visual change before and after being exposed to light of any wavelength between 240 and 280 nm.

[0399] Composition of Mixture 2

[0400]

[0401] [Example 3]

[0402] The following mixture 3 was coated onto a 188 μm thick layer of white polyethylene terephthalate (trade name "CRISPR K1212", manufactured by TOYOBO CO., LTD.) at a solid content of 10 g / m². 2 A sheet 3A, comprising a support and a photosensitive portion, was fabricated by coating and drying the film. The thickness of the photosensitive portion was approximately 10 μm.

[0403] The photosensitive portion in sheet 3A corresponds to the first photosensitive portion of the first embodiment of the inspection tool described above. The photosensitive portion in sheet 3A produces a visual change before and after exposure to light of any wavelength from 200 to 280 nm.

[0404] <Composition of Mixture 3>

[0405]

[0406] The aforementioned sheet 3A was prepared separately, and a TAC sheet (FUJITAC Z-TAC, 60μm thick, manufactured by FUJIFILM Corporation) was laminated on the side of the photosensitive part of the obtained sheet 3A opposite to the support to produce sheet 3B.

[0407] The TAC sheet in sheet 3B corresponds to the filter X in the first embodiment of the inspection tool described above, and the photosensitive part in sheet 3B corresponds to the second photosensitive part A in the first embodiment of the inspection tool described above.

[0408] Sheets 3A and 3B were assembled in a retaining fixture, and an inspection tool 3 was fabricated in the same manner as in Example 1, and then evaluated. Furthermore, in the first embodiment, the first and second photosensitive parts of the inspection tool 3 do not contain microcapsules.

[0409] [Example 4]

[0410] The support body was changed to a 60μm thick TAC sheet (FUJITAC Z-TAC, 60μm thick, manufactured by FUJIFILMC Corporation). Otherwise, sheet 4 was manufactured in the same manner as sheet 1A in Example 1. Sheet 4 was assembled onto a white resin retaining clamp with the photosensitive surface of sheet 4 as the light-receiving surface. This sheet is designated as sheet 4A.

[0411] The photosensitive part in sheet 4A corresponds to the first photosensitive part in the first embodiment of the inspection tool described above.

[0412] Furthermore, sheet 4 is assembled onto a white resin retaining clamp with the TAC sheet surface as the light-receiving surface. This sheet is designated as sheet 4B.

[0413] The TAC sheet disposed on the light-receiving side of the sheet 4B corresponds to the filter X of the first embodiment of the inspection tool described above, and the photosensitive part in the sheet 4B corresponds to the second photosensitive part A of the first embodiment of the inspection tool described above.

[0414] The sample assembled with sheets 4A and 4B was used as inspection tool 4 and evaluated in the same manner as in Example 1. Furthermore, the inspection tool 4 corresponds to the first embodiment, and the first and second photosensitive parts are equipped with microcapsules.

[0415] [Example 5]

[0416] 25 parts by weight of ethyl acetate and 10 parts by weight of TAKENATE D-110N (an adduct of xylene diisocyanate and trimethylolpropane, manufactured by Mitsui Chemicals, Inc., a 75% by weight ethyl acetate solution) were mixed and spin-coated onto a silicon wafer at 1500 rpm for 15 seconds. The resulting coating was then immersed in warm water at 85°C for 3 hours to allow crosslinking. After being removed from the warm water and dried, the coating was peeled off from the silicon wafer to obtain filter X5.

[0417] The obtained filter X5 has a film thickness of approximately 1 μm, and its transmittance is 0.2% at 222 nm, 18.9% at 230 nm, and 70.3% at 254 nm. Furthermore, the filter X5 has an average transmittance of 16% at wavelengths of 200–230 nm, an average transmittance of 71% at wavelengths of 230–280 nm, and a visible light transmittance of 93%.

[0418] A filter X5 was stacked on the side of the photosensitive portion of the sheet 1A produced in Example 1 opposite to the support to produce sheet 5B.

[0419] The filter X in sheet 5B corresponds to the filter X in the first embodiment of the inspection tool described above, and the photosensitive part in sheet 5B corresponds to the second photosensitive part A in the first embodiment of the inspection tool described above.

[0420] The sheet 1A prepared in Example 1 and the sheet 5B described above were assembled in a holding fixture, and the inspection tool 5 was manufactured in the same manner as in Example 1, and evaluated. Furthermore, the inspection tool 5 corresponds to the first embodiment, and the first and second photosensitive parts have microcapsules.

[0421] [Example 6]

[0422] Two commercially available indicators were prepared, each with a light intensity based on wavelengths of 220–280 nm.

[0423] The indicator includes the light receiving unit and the display unit described in the third embodiment above.

[0424] Designate one of the two indicators as indicator A, and attach a TAC sheet (FUJITAC Z-TAC, 60μm thick, manufactured by FUJIFILM Corporation) to the light-receiving part of the other indicator, and designate it as indicator B.

[0425] Indicator A has the first light receiving unit and the first display unit described in the third embodiment above, and indicator B has the filter X, the second light receiving unit and the second display unit described in the third embodiment above.

[0426] The combined indicator A and indicator B were configured as inspection tool 6 and evaluated in the same manner as in Embodiment 1. Inspection tool 6 corresponds to the third embodiment.

[0427] [Example 7]

[0428] The mixture 4 with the following composition was added to a 5% by mass aqueous solution of polyvinyl alcohol (202 parts by mass), and then emulsified and dispersed at 20°C to obtain an emulsion with a volume average particle size of 0.1 μm. The obtained emulsion was continuously stirred at 50°C for 4 hours. In addition, water was added to adjust the concentration to obtain a polyurethane urea particle dispersion with a solid content of 10% by mass.

[0429] <Composition of Mixture 4>

[0430] Solvent: Ethyl acetate (manufactured by SHOWA DENKO KK) 20 parts by weight

[0431] Particulate forming material: adduct of xylene diisocyanate and trimethylolpropane (product name "TAKENATED-110N", manufactured by Mitsui Chemicals, Inc., 75% wt% ethyl acetate solution) 50 parts by weight

[0432] A composition for forming a filter layer was prepared by mixing the obtained polyurethane urea particle dispersion (33 parts by mass), a 6% aqueous solution of polyvinyl alcohol (product name "DENKA SIZE EP-130", manufactured by Denka Company Limited) (22 parts by mass), 0.05 parts by mass of glyoxal (manufactured by DAITOCHEMICAL CO., LTD.) and 0.09 parts by mass of sodium dodecylbenzenesulfonate (manufactured by DKS Co.Ltd.).

[0433] The obtained filter layer forming composition is applied to the side of sheet 1A opposite to the support, with a solid content of 2 g / m². 2 The coating was applied and then heated and dried to produce a sheet 7B having a support and a photosensitive part. A surface layer was scraped from the side of the sheet 7B opposite to the support side, forming a top layer of 1 μm, and the transmittance was measured. The result was approximately the same as the transmittance of the filter sheet X5 obtained in Example 5.

[0434] Sheet 1A and sheet 7B were assembled into a retaining fixture, and an inspection tool 7 was manufactured and evaluated in the same manner as in Example 1. Sheet 7B was assembled onto the retaining fixture with the side opposite to the support being the light-receiving surface.

[0435] [Example 8]

[0436] Sheet 8B was fabricated using TAC sheets (FUJITAC Z-TAC, manufactured by FUJIFILM Corporation, 130μm, with a transmittance of 0.0% at 222nm, 0.06% at 230nm, 69.7% at 254nm, an average transmittance of 0.0% at 200–230nm, an average transmittance of 54.0% at 230–280nm, and a visible light transmittance of 92%) used for lamination.

[0437] Sheets 1A and 8B were assembled in a retaining fixture, and an inspection tool 7 was fabricated in the same manner as in Example 1 and evaluated.

[0438] [Example 9]

[0439] The mixture 1 with the following composition was added to a 5% by mass aqueous solution of polyvinyl alcohol (202 parts by mass), and then emulsified and dispersed at 20°C to obtain an emulsion with a volume average particle size of 10 μm. Furthermore, the obtained emulsion was continuously stirred at 50°C for 4 hours. Water was then added to adjust the concentration, resulting in a microcapsule solution containing a colorant with a solid content of 15.9% by mass.

[0440] <Composition of Mixture 5>

[0441]

[0442]

[0443] A composition for forming a photosensitive part was prepared by mixing the obtained microcapsule dispersion (20 parts by mass), a 6% aqueous solution of polyvinyl alcohol (product name "DENKA SIZE EP-130", manufactured by Denka Company Limited) (5 parts by mass), 0.05 parts by mass of glyoxal (manufactured by DAITO CHEMICAL CO., LTD.) and 0.09 parts by mass of sodium dodecylbenzenesulfonate (manufactured by DKS Co.Ltd.).

[0444] The obtained photosensitive composition was coated onto a 188 μm thick layer of white polyethylene terephthalate (trade name "CRISPR K1212", manufactured by TOYOBO CO., LTD.) with a solid content of 10 g / m². 2 A sheet 9B, comprising a support and a photosensitive portion, was fabricated by coating the material using a specific method and then heating and drying it. The photosensitive portion has a film thickness of approximately 10 μm, and the capsule wall thickness is approximately 0.5 μm.

[0445] Sheets 1A and 9B were assembled in a retaining fixture, and an inspection tool 7 was fabricated in the same manner as in Example 1 and evaluated.

[0446] [Example 10]

[0447] 0.8 g of 7-(diethylamino)coumarin-3-carboxylic acid (manufactured by FUJTFILM Wako Pure Chemical Corporation) and 1 kg of dried acrylic resin granules were placed in a container, dispersed by a shaker, extruded, and then mixed using a mixer to produce granules. These granules were then formed into sheets using a hot press, thus producing sheet 10A. Sheet 2B was produced in the same manner as in Example 2.

[0448] The obtained sheets 10A and 2B were assembled in a holding fixture, and an inspection tool 10 was made in the same manner as in Example 1 and evaluated.

[0449] [Evaluation of 222nm wavelength irradiation]

[0450] For inspection tools 1 to 10, an irradiation wavelength of 222 nm was used, and the results were evaluated. Specifically, a Care222 (registered trademark) (manufactured by Ushio Inc.) was placed at a distance of 20 cm from inspection tools 1 to 10 until the irradiation dose of light with a wavelength of 222 nm reached 1 mJ / cm². 2 Up to this point, inspection tools 1-10 were illuminated, and visual changes before and after illumination were observed (color changes were observed for inspection tools 1-5 and 7-10, and the illumination of the lamp was observed for inspection tool 6). Furthermore, Examples 6 and 10 showed visual changes only during illumination, while Examples 1-5 and 7-9 also showed residual visual changes after illumination. The results are shown in Table 1.

[0451] [Evaluation of 254nm Irradiation]

[0452] Inspection tools 1-10 were irradiated with a wavelength of 254 nm and evaluated. Specifically, a portable UV lamp SLUV-8 (manufactured by AS ONE Corporation) was placed 20 cm away from inspection tools 1-10 until the irradiation dose of light with a wavelength of 254 nm reached 3 mJ / cm². 2Up to this point, inspection tools 1-10 were illuminated, and visual changes before and after illumination were observed (color changes were observed for inspection tools 1-5 and 7-10, and the illumination of the lamp was observed for inspection tool 6). Furthermore, Examples 6 and 10 showed visual changes only during illumination, while Examples 1-5 and 7-9 also showed residual visual changes after illumination. The results are shown in Table 1.

[0453] In Table 1, "white → magenta" indicates that the visual evaluation before and after irradiation changed from white to magenta, and "white → purple" indicates that the visual evaluation before and after irradiation changed from white to purple.

[0454] [Table 1]

[0455]

[0456] The inspection tool manufactured in each embodiment includes a first display unit and a second display unit, so it is possible to easily determine whether light that inactivates viruses or other pathogens has been irradiated, and whether light that is harmful to the human body has been irradiated, by visual changes.

[0457] More specifically, for example, when the inspection tool 1 of Embodiment 1 is irradiated with light including light with a wavelength of 222 nm but excluding light with a wavelength of 230 to 280 nm, a visual change from white to magenta is produced in the first display unit, but no visual change is produced in the second display unit. Therefore, it can be confirmed that light that inactivates viruses and the like has been irradiated and that light that is harmful to the human body has not been irradiated.

[0458] On the other hand, using commercially available UV scales (L type, manufactured by FUJIFILM Corporation) and UV markers (S type, manufactured by NICHIYU GIKEN KOGYO COMPANY, LIMITED), the same irradiation evaluation as in the example was performed, but it was not possible to simultaneously determine whether light that inactivates viruses or other pathogens was irradiated, and whether light harmful to the human body was irradiated.

[0459] Symbol Explanation

[0460] 10, 30, 40 - Inspection tool, 12 - Support body, 14 - Photosensitive part, 16 - Filter, 18 - First display part, 20 - Second display part, 22 - Holding substrate, 42 - First photosensitive part, 44 - Second photosensitive part B.

Claims

1. An inspection tool, comprising a first display unit and a second display unit, The first display unit is a display unit that produces a visual change before and after the inspection tool is irradiated with light of at least any wavelength in the wavelength range of 200nm to 280nm. The first display unit includes a first photosensitive unit that produces a visual change before and after being sensitive to light of at least any wavelength in the wavelength range of 200 to 280 nm. The first photosensitive part contains relative to m 2 The calculated value is 0.020 g / m². 2 Above and 0.500g / m 2 The following colorants, The second display unit is one that does not produce visual changes before and after the inspection tool is irradiated with light of a wavelength in the range of 200nm to 230nm, and produces visual changes before and after the inspection tool is irradiated with light of at least any wavelength in the range of wavelengths exceeding 230nm and below 280nm. The second display unit includes: A filter X blocks light in the wavelength range of 200 nm to 230 nm; a second photosensitive unit produces a visual change before and after receiving light of at least any wavelength in the range of 230 nm to 280 nm that has passed through the filter X. The second photosensitive area is the area of ​​the photosensitive sheet covered by the filter X that produces visual changes by sensing light of all wavelengths in the range of 200-280 nm. The first photosensitive area is the area of ​​the photosensitive sheet not covered by the filter X. The transmittance of filter X at a wavelength of 222 nm is less than 5%. The transmittance of the filter X at a wavelength of 254 nm is above 50%.

2. The inspection tool according to claim 1, wherein, The visual changes are selected from changes in color, changes in pattern, and combinations thereof.

3. The inspection tool according to claim 1, wherein, The second photosensitive part contains a colorant.

4. The inspection tool according to any one of claims 1 to 3, wherein, The filter X has an average transmittance of less than 1% in the wavelength range of 200nm to 230nm. The filter X has an average transmittance of over 50% in the wavelength range of 230nm to 280nm.

5. The inspection tool according to any one of claims 1 to 3, wherein, The filter X comprises a resin selected from triacetyl cellulose, polyvinyl chloride, acrylic resins, methacrylic resins, polyurethane, and polyurea.

6. An inspection method using the inspection tool according to any one of claims 1 to 5.

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