Electron donor visualization method, and electron donor visualization porous body and electron donor visualization kit used therefor

Abstract

To provide an electron donor visualization method that can clearly visualize the attachment sites of electron donors D, such as vomit or excrement, and can be incorporated into processing operations for vomit or excrement aimed at preventing secondary infection without increasing the number of work steps, as well as an electron donor visualization porous body 1 and an electron donor visualization kit used therein.SOLUTION: The attachment sites of electron donor D are visualized by covering the surface where electron donor D is attached with an electron donor visualization porous body 1 containing an electron-donating coloring agent, and then impregnating this electron donor visualization porous body 1 with a bleaching component consisting of an electron acceptor.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an electron donor visualization method for visualizing the adhesion site of an electron donor, such as vomit, and to an electron donor visualization porous body and electron donor visualization kit used in the method. [Background technology]

[0002] Norovirus, rotavirus, and other viruses are pathogens that cause infectious gastroenteritis. These viruses are highly contagious, and even a small amount of virus can easily cause secondary infection. Furthermore, the vomit and feces of people infected with norovirus and other viruses contain large amounts of virus. For this reason, when dealing with waste such as vomit and excrement, it is important to remove the waste using appropriate methods and thoroughly disinfect it to prevent infection to workers and those around them.

[0003] Conventionally, various public institutions have prepared manuals for the disposal of vomit, excrement, etc. that have been scattered on floors, etc. In accordance with the current disposal manuals, the disposal operation for vomit, etc. (hereinafter referred to as "disposal operation") generally includes the following steps: (1) wearing protective equipment, (2) preparing a sodium hypochlorite solution, (3) removing vomit, etc., (4) disinfecting floors, etc., and (5) wiping down after disinfection.

[0004] Among the above steps, in the (4) disinfection of floors, etc. step, which is carried out after the removal of vomit, etc., it is recommended to cover the surface on which the vomit or other contaminants were attached (floor, wall, etc.; hereinafter referred to as "attached surface") and its surroundings with paper towels, etc., and then pour a 0.02 to 0.1% sodium hypochlorite solution over it, wait about 10 minutes, and then wipe it off. It is also recommended that as large an area as possible be covered with paper towels, etc. for disinfection.

[0005] However, there is a risk that vomit and other waste may scatter as invisible droplets, making it difficult to visually determine the extent of the scattering of waste. If waste is scattered outside the disinfected area covered with paper towels, etc., there is a risk that viruses may remain in those areas without being disinfected.

[0006] In addition, hypochlorous acid decomposes when it comes into contact with organic matter such as protein, reducing its disinfecting effect. To prevent a decrease in disinfecting effect within the disinfection area, it is recommended to thoroughly wipe away organic stains such as vomit before disinfecting the surface. However, organic stains may not be completely removed due to unevenness of the surface. Furthermore, if the surface is covered with paper towels, it is impossible to visually check the presence or location of organic stains.

[0007] Incidentally, the inventor has proposed an electron donor visualization kit that can visualize electron donors such as urine and vomit that have scattered on floor surfaces, etc. (Patent Document 1). This electron donor visualization kit comprises a liquid A containing a coloring component and a liquid B containing a bleaching component, and visualizes the scattered range by spraying liquid A and liquid B onto the surface where the electron donor has adhered.

[0008] In the invention described in Patent Document 1, the bleaching component of Solution B reacts with the electron donor, reducing the bleaching ability in that area, but not in other areas. When Solution A, which contains a coloring component, is sprayed onto the surface, the areas where the electron donor is attached become colored because the bleaching ability is reduced, but the other areas do not, so the coloring component is decolorized and becomes colorless. As a result, the dye remains only in the areas where the electron donor is attached, making the areas where the electron donor is attached visible. This has the effect of making it easier to remove sources of dirt and odors when cleaning the home, etc.

[0009] The electron donor visualization kit described in Patent Document 1 can be used to visualize the scattered area of ​​vomit, etc. However, the dye contained in Solution A described in Patent Document 1 does not have the ability to conceal the surface on which it is attached, and if the surface on which it is attached is dark in color, such as black or brown, the stained area is difficult to see visually. Since rapid and reliable disinfection is required to prevent secondary infection, it is preferable to easily visualize the scattered area and remaining area of ​​vomit, etc.

[0010] Furthermore, when the visualization work using the electron donor visualization kit described in Patent Document 1 is incorporated into the treatment operation, the visualization work must be performed in addition to the disinfection process, which increases the number of steps.

[0011] Processing operations to prevent secondary infection involve significantly more steps than regular cleaning work. For example, in addition to the main steps mentioned above, other tasks include changing protective equipment at the appropriate time, placing removed waste and used protective equipment in plastic bags, soaking them in sodium hypochlorite solution, and then collecting them. Therefore, the additional steps place a burden on workers. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] International Publication No. 2022 / 185727 Summary of the Invention [Problem to be solved by the invention]

[0013] The object of the present invention is to solve the above-mentioned conventional problems, and to provide an electron donor visualization method that can clearly visualize the adhesion locations of electron donors in vomit, excrement, etc., and that can visualize the adhesion locations of electron donors without adding additional work steps even when incorporated into processing operations for vomit, excrement, etc. for the purpose of preventing secondary infection, as well as an electron donor visualization porous body and electron donor visualization kit to be used therein. [Means for solving the problem]

[0014] In order to solve the above problems, a method for visualizing an electron donor is provided in which an electron donor-visualizing porous body containing an electron donating colorant is covered on the surface of the electron donor, and a bleaching component consisting of an electron acceptor is infiltrated into the electron donor-visualizing porous body.

[0015] It is preferable to cover the surface of the electron donor with the electron donor-visualizing porous body, and then pour a bleaching solution containing the bleaching component onto the surface to allow the bleaching component to penetrate into the porous body.

[0016] It is also preferable to apply a bleaching solution containing the bleaching component to the surface of the electron donor, cover it with the electron donor-visualizing porous body, and then allow the bleaching component to penetrate into the porous body.

[0017] It is preferable to cover the surface of the electron donor with the visualized porous body, spray a powdered bleaching agent containing the bleaching component on top of it, and then pour a liquid over it to allow the bleaching component to penetrate into the porous body.

[0018] The present invention also provides an electron donor visualization porous body containing an electron donor colorant, which is used in the electron donor visualization method.

[0019] The electron donor visualization kit is also provided by combining the electron donor visualization porous body with a bleaching agent containing the bleaching component. [Effects of the Invention]

[0020] The present invention makes it possible to provide an electron donor visualization method that can clearly visualize the locations of attachment of electron donors in vomit, excrement, etc., and that can visualize the locations of attachment of electron donors without increasing the number of work steps even when incorporated into processing operations for vomit, excrement, etc. for the purpose of preventing secondary infection, as well as an electron donor visualization porous body and electron donor visualization kit for use therein. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 10 is a diagram showing a schematic view of the state in which the electron donor-visualizing porous body of the embodiment is placed on the floor surface after vomitus has been removed. [Figure 2] FIG. 2 is a diagram schematically showing the state in which the electron donor-visualizing porous body of FIG. 1 is exposed to a bleaching solution, and the adhesion sites of the electron donor are visualized. DETAILED DESCRIPTION OF THE INVENTION

[0022] The following describes an embodiment of the invention.

[0023] In the present invention, an electron-donor-visualized porous body containing an electron-donating colorant is placed over the surface of the electron donor, and a bleaching component consisting of an electron acceptor is then infiltrated into the electron-donor-visualized porous body. The bleaching performance of the bleaching component consisting of the electron acceptor changes depending on the reaction with the electron donor, resulting in a difference in bleaching power between the area where the electron donor is attached and other areas (areas where the electron donor is not attached). Therefore, the electron-donor-visualized porous body exhibits different colors between the area where the electron donor is attached and the other areas. This difference in color can be visually confirmed, making it possible to visualize the area where the electron donor is attached.

[0024] In many cases, the bleaching component that has penetrated the electron-donor-visualized porous body reacts with the electron donor at the attachment site, reducing the bleaching ability in that area, but not in areas other than the attachment site. As a result, in many cases, the colorant contained in the electron-donor-visualized porous body remains only at the attachment site of the electron donor, while other areas are decolorized. This causes the attachment site of the electron donor on the surface of the electron-donor-visualized porous body to become colored, making it possible to visualize the attachment site of the electron donor.

[0025] In addition, due to the influence of pH, etc., the areas where the electron donor is attached may be discolored, and the colorant may remain in areas other than the areas where the electron donor is attached. Furthermore, when the colorant is a fluorescent dye, the change in color state is difficult to see visually, but the areas where the electron donor is attached may emit light and become visible by using a black light, etc. In either case, the areas where the electron donor is attached and other areas on the surface of the electron donor-visualizing porous body are visualized, thereby achieving the object of the present invention.

[0026] In the present invention, the electron donor-visualizing porous body itself has the ability to conceal the adhesion surface, making it possible to clearly visualize the adhesion locations of electron donors. Furthermore, the electron donor-visualizing porous body of the present invention can be used to carry out the disinfection process of an existing treatment operation, making it possible to visualize the adhesion locations of electron donors without increasing the number of work steps in the treatment operation. Furthermore, the adhesion locations of electron donors visualized on the surface of the electron donor-visualizing porous body can serve as a guide for locations where the disinfection effect may be reduced due to inactivation of the bleaching component.

[0027] (electron donor) The electron donor to be visualized is preferably a compound containing at least one nucleophilic atomic group, and the nucleophilic atomic group is preferably any one selected from the group consisting of C=C, CN, C=N, -NH, -NH-, -SH, and combinations thereof.

[0028] Specific examples of the electron donors include amino acids, proteins and peptides made from amino acids, creatinine, carbohydrates, vitamin C, amylase, ethanol, ammonia, etc. The amino groups of amino acids and the ether groups of glucose and other sugars are electron donors that are easily oxidized, and vomit and excrement can be visualized because they contain proteins.

[0029] In addition, compounds with high electron density (δ-) bond sites, such as C=C, C=N, CN (including peptide bonds), -NH2, -NH-, and -SH, are easily oxidized. This makes it possible to visualize compounds such as starch, proteins, amino acids, and sugars, as well as vomit and excrement. This allows for the visualization of saliva, fingerprints and sweat containing urea and proteins, biofilms, and other substances. It can also visualize sweeteners and juices containing glucose and dextrose, foods containing antioxidants and vitamin C, such as soft drinks, tea, sake, rice, and sugar, and soap scum.

[0030] (porous body) The electron donor-visualized porous body of the present invention contains an electron donor colorant, which will be described later. In an embodiment, a coloring liquid containing the electron donor colorant is prepared, and the porous body is immersed in the coloring liquid and then dried to produce the electron donor-visualized porous body. At least a portion (preferably the entirety) of the surface of the electron donor-visualized porous body is colored by the electron donor colorant.

[0031] The porous body in the present invention is not particularly limited as long as it is a porous material having a plurality of pores, and various known materials can be used. As the porous body, for example, a fibrous body such as paper, cloth, or nonwoven fabric is suitable, and a sheet-like sponge body or porous rubber having interconnected pores may also be used. From the viewpoint of hiding power, the shape of the porous body is preferably sheet-like. Furthermore, the porous body is preferably hydrophilic.

[0032] Specific examples of fibrous materials used for the electron donor-visualizing porous material include nonwoven fabric, paper towels, kitchen paper, Japanese writing paper, filter paper, etc. Nonwoven fabrics with high water absorption are preferred, and examples thereof include rayon nonwoven fabrics and cupra nonwoven fabrics.

[0033] It is preferable to use a porous body that has good hiding power when wet, because the electron donor can be easily visualized even if the surface to which it is attached is dark in color. Furthermore, for materials that tend to become translucent when wet and lose their hiding power, a pigment such as titanium oxide may be added to improve the hiding power.

[0034] Furthermore, it is preferable to use a material for the porous body that allows a liquid to flow easily inside the porous body. If the liquid flows easily inside the porous body, the bleaching component contained in the liquid can easily mix with the bacteria and viruses contained in the electron donor, and sterilization and disinfection can be easily performed.

[0035] Furthermore, it is preferable to use a material that is easily permeable to liquid as the porous body. If the porous body is highly permeable, when a bleaching solution is poured onto the porous body, the bleaching component contained in the liquid can quickly penetrate the porous body and come into contact with the electron donor on the adhesion surface. By quickly contacting the bleaching component with the electron donor, the bleaching component at the adhesion site can be deactivated before the entire colorant in the porous body is bleached, and the adhesion site can be well visualized. Furthermore, even if the electron donor is dry and difficult to visualize, for example, the moisture that penetrates the porous body is quickly supplied to the electron donor, which oxidizes the electron donor well, making the adhesion site easily visualized.

[0036] Furthermore, it is preferable that the porous body has flexibility when wet. By using a porous body that has flexibility at least when wet, wiping becomes easier, wrinkles can be suppressed, and part of the porous body that absorbs liquid can be prevented from floating up from the surface to which it is applied.

[0037] (Colored liquid) Next, the coloring liquid used to impregnate the porous body with the electron-donating colorant will be described. As described above, in this embodiment, the porous body is immersed in the coloring liquid and then dried to produce an electron-donor-visualized porous body. The coloring liquid in this embodiment contains at least an electron-donating colorant and a solvent.

[0038] (Electron-donating colorant) An electron-donating colorant is a colorant that easily loses electrons and is oxidized. As the electron-donating colorant, for example, the dyes shown in Tables 1, 2, and 3 below can be used. Table 1 lists acid dyes including anthraquinone dyes, Table 2 lists basic dyes, and Table 3 lists other dyes. CI in the tables is the color index established by the British and American dye societies. The amount added should be sufficient to color the solvent, and is preferably about 10 ppm to 10 wt %, and more preferably 100 ppm to 1 wt %.

[0039] A fluorescent dye may be used as the colorant. If the colorant is a fluorescent dye, the adhered area will emit light when irradiated with excitation light such as black light, making it possible to clearly visualize the adhered area.

[0040] [Table 1]

[0041] [Table 2]

[0042] [Table 3]

[0043] (solvent) The solvent for the coloring solution can be water such as ion-exchanged water, pure water, or tap water, or an organic solvent. Examples of the organic solvent include alcohols such as methanol, ethanol, propanol, butanol, pentanol, hexanol, and benzyl alcohol, and diols or triols such as glycerin, diglycerin, triglycerin, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, and polyethylene glycol, used alone or in combination. The amount of the organic solvent added is preferably 60 to 99.99% by weight.

[0044] (thickener) A known thickener may be added to the coloring liquid. Examples of known thickeners include water-swellable silicate particles, alginate, carboxymethylcellulose, gum arabic, arginine polymer, sodium alginate, alginate-propylene glycol, ethylcellulose, xanthan gum, carrageenan, pectin, gellan gum, methylcellulose, ketone-aldehyde condensation resin, polyvinylpyrrolidone resin, butyral resin, acrylic resin, and cellulose nanofiber. The amount of thickener added is preferably 0.1 to 20% by weight.

[0045] The water-swellable silicate particles are a general term for a group consisting of smectite, bentonite, vermiculite, and mica, and the smectite is a general term for a group consisting of montmorillonite, a dioctahedral hydrous layered silicate mineral, and hydrite, nontronite, saponite, hectorite, sauconite, and stevensite, which have a structure similar to montmorillonite. The water-swellable silicate particles may be natural or synthetic.

[0046] The alginate is not particularly limited as long as it is a salt of alginic acid, but is preferably a monovalent cation salt of alginic acid, such as the sodium salt (sodium alginate), potassium salt (potassium alginate), or ammonium salt (ammonium alginate).

[0047] By adding a thickener to the coloring solution, the decolorization rate of the colorant due to the bleaching component can be adjusted to slow down. If the decolorization rate of the colorant is too fast, depending on the amount of electron donor attached and the concentration of the colorant or bleaching agent, even the visualized colored area may be prematurely decolorized. Furthermore, there is a risk that the entire porous body will be bleached before the dried electron donor absorbs moisture and penetrates into the electron donor-visible porous body.

[0048] (Elimination aid) The coloring liquid can contain a quaternary ammonium salt as an erasing aid. Examples of quaternary ammonium salts include tetramethylammonium chloride, tetrabutylammonium chloride, methylbenzethonium chloride, distearyldimethylammonium chloride, cetylpyridinium chloride, alkyltrimethylammonium chloride, octyltrimethylammonium chloride, decyltrimethylammonium chloride, dodecyldimethylbenzylammonium chloride, dodecyltrimethylammonium chloride, tetradecyltrimethylammonium chloride, hexadecyltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, benzyltrimethylammonium chloride, benzyltriethylammonium chloride, dialkyldimethylammonium chloride, tetramethylammonium hydroxide, benzalkonium bromide, cetrimonium bromide, domiphen bromide, alkyltrimethylammonium bromide, hexadecyltrimethylammonium bromide, hexadecyltrimethylammonium bromide, and the like, but are not limited thereto. Preferably, benzalkonium chloride, benzethonium chloride, and dodecyltrimethylammonium chloride can be used. The above-mentioned elimination aid is preferably added in an amount of 10 ppm to 10% by weight.

[0049] The coloring liquid may also contain, as an erasing aid, one or more surfactants selected from the compounds shown in the following formulas 1 and 2. In these formulas, R is an alkyl or alkenyl group having 8 to 24 carbon atoms, X is an N atom or CO-N, A is an alkyl or oxyalkylene group having 2 to 4 carbon atoms, M is NH or HN(C2H4OH)3, n and m in formula 1 are 0 or integers of 1 or more (excluding both being 0), and n in formula 2 is an integer from 0 to 10.

[0050] [ka]

[0051] [ka]

[0052] The compound shown in Chemical Formula 1 is a compound in which an alkyl or alkenyl group having 8 to 24 carbon atoms, or an alkyl or oxyalkylene group having 2 to 4 carbon atoms is bonded to the N atom or CO-N shown as X. Representative examples include polyoxyethylene stearylamine ether, polyoxyethylene alkylamine, and alkylalkanolamide.

[0053] The compound shown in Chemical Formula 2 is (CH2CH2O) n It is a compound in which a hydrophilic group represented by R and a hydrophilic group represented by SO3M are bonded to both ends of a hydrophilic group such as ethylene glycol represented by (2). M is a counter ion (NH4 or HN(C2H4OH)3). Representative compounds of Chemical Formula 2 are ammonium lauryl sulfate, triethanolamine lauryl sulfate, and polyoxyethylene alkyl ether triethanolamine sulfate.

[0054] The content of the surfactant is preferably 10 ppm to 20 wt %, and more preferably 100 ppm to 5 wt %. When the coloring liquid contains such a surfactant, the electron-donating colorant in the electron-donor-visualizing porous body is quickly decolorized on the surface to which the electron donor does not adhere.

[0055] (bleach) Next, we will explain the bleaching agent to be infiltrated into the electron donor-visualized porous body that is placed on the surface where the electron donor is attached. The bleaching agent is a liquid containing a bleaching component made of an electron acceptor (hereinafter sometimes referred to as a "bleaching solution"), or a powder containing a bleaching component made of an electron acceptor (hereinafter sometimes referred to as a "powdered bleaching agent"). The bleaching solution contains at least the bleaching component and a solvent. The powdered bleaching agent can be used together with a liquid such as water to infiltrate the electron donor-visualized porous body.

[0056] The electron acceptor is an oxidizing agent that oxidizes a counter substance by accepting electrons, and can be selected from the group consisting of metal hypochlorites such as sodium hypochlorite, metal chlorates, hydrogen peroxide, metal perborates, metal percarbonates, metal peroxides, acyl peroxides, benzoyl peroxide, peracetic acid, ozone, sodium bisulfate, nitrogen dioxide, chlorine, chlorine dioxide, azodicarbonamide, sodium sulfite, sodium metabisulfite, percarbonates, tetraacetyleneethylenediamine, metal peroxymonosulfates, and mixtures thereof. The amount of the electron acceptor added is preferably 10 ppm to 20 wt %, and more preferably 100 ppm to 6 wt %.

[0057] The electron acceptor contained in the bleach is preferably a composition that has an inactivating effect on viruses and bacteria, such as norovirus. If the bleach contains an electron acceptor that has an inactivating effect on viruses and bacteria, it can be used in the disinfection process of current treatment operations, and disinfection and visualization of the electron donor can be performed simultaneously.

[0058] The bleaching agent may contain additives such as surfactants and pH adjusters. A thickener such as synthetic smectite may also be added to the bleaching agent to enhance adhesion. The thickener contained in the bleaching agent can be any of the above-mentioned thickeners, and the amount added is preferably 0.01 to 20% by weight.

[0059] (Electron donor visualization kit) As described above, in the present invention, an electron donor visualization porous body containing an electron donating colorant is used in combination with a bleaching agent containing a bleaching component consisting of an electron acceptor. Therefore, it is preferable to provide an electron donor visualization kit containing the electron donor visualization porous body and the bleaching agent.

[0060] The form of the electron donor visualization kit is not particularly limited. The electron donor visualization porous body may be placed in a box-shaped container or may be packaged in a film-shaped packaging material.

[0061] When the bleaching agent included in the electron donor visualization kit is a bleaching solution, the bleaching solution may be contained in a bottle or a spray bottle. The bleaching solution may be diluted to an appropriate concentration before use, or may be usable as is without dilution. For example, if the bleaching solution is a sodium hypochlorite solution with a concentration of 0.02 to 0.1%, it can be used directly in the disinfection process of current treatment operations, eliminating the need for dilution and improving convenience.

[0062] When the bleaching agent included in the electron donor visualization kit is a powder bleach, the packaging form of the powder bleach is not particularly limited. Furthermore, the electron donor visualization kit may or may not include a liquid to be poured on top of the sprayed powder bleach. Examples of the liquid to be poured on top of the powder bleach include water and water with added ingredients such as a thickener.

[0063] The bleaching agent included in the electron donor visualization kit can be in the form of a liquid or powder, or can be contained in a porous body. For example, it can be a bleaching agent sheet, in which the bleaching component is contained in a sheet-like porous body. The bleaching agent sheet can be used in current processing operations by covering the surface on which the electron donor is attached with the bleaching agent sheet, then covering the electron donor visualization porous body with the bleaching agent sheet, and if necessary, pouring a liquid such as water on top of the bleaching agent sheet.

[0064] The bleach sheet eliminates the need to prepare diluted sodium hypochlorite aqueous solutions each time. The bleach sheet is not limited to use in combination with the electron donor-visualized porous material, but can also be used alone for disinfection. The bleach sheet is preferably sealed until immediately before use to prevent a decrease in bleaching ability due to the decomposition reaction of the bleaching component.

[0065] (Electron donor visualization method) Next, an example of an electron donor visualization method according to an embodiment will be described with reference to Figures 1 and 2. Figures 1 and 2 schematically show a disinfection process in a treatment operation when a virus-infected person vomits onto the floor.

[0066] First, workers put on protective equipment such as disposable masks, gloves, and aprons, and then use disposable cloths or paper towels to wipe up any vomit that has been scattered on the floor. The paper towels used to wipe up the vomit are then placed in plastic bags or similar for collection. At this point, it is preferable that the workers dispose of the used gloves, disinfect their hands, and put on new gloves.

[0067] Next, the worker covers the vomit center C on the floor and its surroundings with an electron donor-visualizing porous body, as shown in Figure 1. In this example, the electron donor-visualizing porous body is a nonwoven fabric sheet 1 that is entirely colored blue, and 12 sheets are used in the figure. As shown in Figure 1, electron donor D, which is a stain derived from vomit and is invisible or difficult to see, remains in and around the vomit center C.

[0068] In this embodiment, a worker pours a bleach solution containing an electron acceptor onto the nonwoven fabric sheet 1 laid on the floor. The bleach solution used in the disinfection process is preferably a sodium hypochlorite aqueous solution with a concentration of 0.02 to 0.1%. In this embodiment, a 0.1% sodium hypochlorite aqueous solution is used. The worker pours the bleach solution onto the nonwoven fabric sheet 1, allows it to penetrate, and leaves it for about 10 minutes to disinfect the contaminated area.

[0069] The method is not limited to the method of laying the nonwoven fabric sheet 1 and then pouring the bleaching solution on it, but rather, the bleaching solution may be poured on the floor surface and then the nonwoven fabric sheet 1 may be placed on top of it.

[0070] When using powder bleach as the bleaching agent, the nonwoven fabric sheet 1 can be laid on the floor, the powder bleach can be sprinkled on top of it, and then a liquid such as water can be poured on top. Alternatively, powder bleach dissolved in a solvent can be sprinkled. The bleach sheet described above can also be used instead of bleach liquid or powder bleach.

[0071] 2, hypochlorous acid contained in the bleaching solution that has permeated the nonwoven fabric sheet 1 is inactivated by coming into contact with and reacting with electron donor D, resulting in a decrease in bleaching ability at the locations where electron donor D is attached. As a result, the surface of the nonwoven fabric sheet 1 turns blue in the areas where electron donor D is attached, forming blue colored areas 11.

[0072] On the other hand, the bleaching ability of hypochlorous acid does not decrease in areas other than those where electron donor D is attached. Therefore, the areas on the surface of nonwoven fabric sheet 1 that correspond to those areas other than those where electron donor D is attached are bleached over time, becoming bleached areas 12 that are a different color from colored areas 11. The difference in color between colored areas 11 and bleached areas 12 makes the areas where electron donor D is attached visible within the disinfection area where nonwoven fabric sheet 1 is laid.

[0073] The colored portion 11, which indicates the location where the electron donor D has adhered, also serves as a marker to indicate the location where the inactivation effect of viruses and bacteria may be reduced. The worker can take measures such as adding bleach to the colored portion 11.

[0074] 2, if colored area 11 is confirmed at the edge of the disinfection area where nonwoven fabric sheet 1 is laid, it can be determined that there is a high possibility that electron donor D has scattered outside the disinfection area. The worker can add nonwoven fabric sheet 1 outside the current disinfection area and disinfect it by spraying bleach on it.

[0075] The electron donor-visualizing porous body can also be used to visualize the adhesion sites of the electron donor in the wiping step prior to the disinfection step. By visualizing the electron donor in both the wiping step and the disinfection step, more effective cleaning and disinfection are possible.

[0076] (Test 1: Porous body test) Test sheets were prepared using each of the porous bodies shown in Table 4, and their suitability as electron donor-visualizing porous bodies was evaluated.

[0077] (Preparation of coloring solution) The materials were mixed to obtain the composition shown in Table 4 below to prepare a coloring liquid.

[0078] [Table 4]

[0079] (Creating test sheets) Small pieces of the same dimensions were prepared for each porous body shown in Table 5. The coloring liquid was impregnated into each small piece to color the entire piece blue, and the piece was then dried for one day. This produced test sheets containing an electron-donating colorant.

[0080] The "Japanese paper + titanium oxide" sheet was made by blending 2% by mass of titanium oxide into the coloring liquid and then allowing it to penetrate into the Japanese paper. The absorbent nonwoven fabrics were all commercially available dry-type nonwoven fabrics for wiping.

[0081] (Exam contents) White and black tiles were prepared as surfaces to which the electron donor was attached. 0.04 mL of artificial urine (urea, ammonium chloride, calcium ions, and sodium ascorbate) or artificial vomit (a mixture containing pepsin, peptone, taurocholic acid, phospholipids, lecithin, mucin, amino acids, and a pH adjuster) was dropped onto each tile using a dropper as the electron donor to be visualized. Note that in some tests, the dropped electron donor was used after drying. A test sheet was placed on the tile with the electron donor attached, and 20 g of a 0.1% sodium hypochlorite solution was poured over it. The following items were evaluated:

[0082] (visualization performance on white tiles) The surface of the test sheet placed on a white tile was visually inspected to see if colored areas indicating the attachment points of the electron donor were visible. If the colored areas were clearly visible, it was rated "A," if the colored areas were visible, it was rated "B," if the colored areas were visible but the color of the colored areas was light or the boundary between the colored areas and the bleached areas was unclear, it was rated "C," and if areas other than the attachment points did not decolorize and the attachment points could not be visualized, it was rated "D." Note that there were no samples rated "D" in this test.

[0083] (Opacity (visibility on black tiles)) When the sheet becomes translucent when wet, the color of the surface to which it is attached becomes visible. If the surface to which it is attached is dark, the bleached area will appear dark and difficult to distinguish from the colored area. Therefore, for sheets that were able to visualize the attached area on a white tile, the hiding power (ease of seeing the colored area) was visually checked when wet on a black tile. If the colored area was clearly visible, it was rated "A," if the colored area was visible, it was rated "B," if the colored area was visible but slightly difficult to see, it was rated "C," and if the colored area was not visible, it was rated "D." Note that no sheets received a "D" rating in this test.

[0084] (Fluidity / Permeability) The ease with which the liquid flows within the sheet was evaluated. Good fluidity makes it easier for the electron donor and bleaching solution to mix, which is expected to improve disinfection performance. Furthermore, good permeability of the sheet allows the liquid to quickly penetrate to the back of the sheet. This allows the bleaching component to reach the electron donor before the entire sheet is decolorized, reducing the bleaching ability at the attached areas and making them easier to visualize. Products with particularly excellent fluidity and permeability were rated "A," those with the next best performance rating "B," those that were good but still feasible being "C," and those that did not achieve the target performance rating "D." Note that no products in this test received a rating of "D."

[0085] (Flexibility / Wrinkles) If the sheet is flexible, it will not easily lift off the surface it is attached to, making it suitable for wiping. Also, the fewer wrinkles in the sheet, the less likely it is to lift off the surface it is attached to and the less likely it is for liquid to penetrate. Regarding the flexibility and the number of wrinkles in a sheet, sheets that are particularly excellent are rated "A", those that are second best are rated "B", those that are good but still feasible are rated "C", and those that do not achieve the target performance are rated "D". Note that no sheets were rated "D" in this test.

[0086] Table 5 shows the porous body used as the material for each sheet and the type of electron donor to be visualized, as well as the results of each evaluation.

[0087] [Table 5]

[0088] (Summary of evaluation results) Thin absorbent paper generally provides good visibility of the area where it is attached on white tiles. Depending on the type of sheet, its hiding power may be poor, but this can be improved by adding a pigment (such as titanium oxide) to the coloring liquid.

[0089] The thick absorbent paper exhibited excellent visualization performance on both white and black tiles, but its fluidity was somewhat inferior. In addition, because the sheet was harder than the thin absorbent paper, it tended to lift off the surface more easily.

[0090] PPC (copy paper) has the ability to make the stain visible and conceal it, but it is somewhat inferior in terms of absorbency, fluidity, and flexibility.

[0091] All absorbent nonwoven fabrics showed good visibility of the areas where the substance was attached. Although their hiding power decreased slightly when wet, they had excellent penetration, making them ideal for disinfection processes. They also had excellent flexibility, were wrinkle-resistant, and were suitable for wiping.

[0092] The above test showed that paper towels (white) and absorbent nonwoven fabric were the best porous materials for visualizing electron donors. In particular, the absorbent nonwoven fabric was able to effectively visualize even dried artificial vomit.

[0093] (Test 2: Visualization of trace electron donors) Using the test sheet (white paper towel) from Test 1, visualization performance was tested by varying the amount of artificial vomit dripped onto a white tile. Even with minute amounts of artificial vomit dripped, such as 0.01 mL and 0.001 mL, the colored area was clearly visible.

[0094] (Test 3: Test of coloring solution using water-soluble electron-donating coloring agent) Next, using a water-soluble electron-donating colorant, coloring solutions of Examples 1 to 10 were prepared to have the compositions shown in Table 6. Electron-donor-visualized porous bodies (electron-donor-visualized sheets) containing each of these coloring solutions were prepared, and a visualization test of the electron-donor-adhered locations was carried out. The materials used in the coloring solutions are as follows:

[0095] (solvent) Distilled water ·ethanol

[0096] (Water-soluble electron-donating colorant) Acid Blue 112 ·Food blue No. 2 ·Food blue No. 1 Acid Blue 90 (product name "WATER BLUE 105", manufactured by Orient Chemical Industries Co., Ltd.) Food Blue No. 2 Aluminum Lake Pyranine 120 (manufactured by LANXESS)

[0097] (thickener) Carboxymethyl cellulose (product name "Sunrose (registered trademark) FJ08HC", manufactured by Nippon Paper Industries Co., Ltd.) Layered inorganic compound (synthetic hectorite, trade name "LAPONITE (registered trademark)-RDS", manufactured by BYK)

[0098] (resin) Ketone-aldehyde condensation resin (product name "TEGO (registered trademark) VariPlus CA", manufactured by EVONIC)

[0099] (Preparation of electron donor visualization sheet) A nonwoven fabric (product name "Easy Waste Disposal Kit (High Absorbency Sheet)", manufactured by Kao Professional Services Co., Ltd.) was immersed in the coloring solution of Examples 1 to 10 and then dried to prepare an electron donor visualization sheet.

[0100] (Exam contents) A white tile was used as the attachment surface for the electron donor. Liquid artificial vomit (a mixture containing pepsin, peptone, taurocholic acid, phospholipids, lecithin, mucin, amino acids, and a pH adjuster) was dropped onto the white tile as the electron donor to be visualized. The tile with the liquid artificial vomit attached was covered with the electron donor visualization sheet, and 20 g of bleaching solution (0.1% sodium hypochlorite aqueous solution) was poured on top of it. The time required for bleaching was measured and the following items were evaluated.

[0101] (Visualization performance) The surface of the electron donor visualization sheet on the white tile was visually inspected to see if the colored areas indicating the attachment points of the electron donor could be visualized. If the colored areas were clearly visible, it was rated as "A," if the colored areas were visible, it was rated as "B," if the colored areas were visible but the color was faint, it was rated as "C," and if the colorant did not fade and the attachment points could not be seen, it was rated as "D."

[0102] (Discoloration time for areas other than those with stains) The time required for the colorant to fade was measured at the locations other than the location where the stain containing the electron donor was attached.

[0103] The electron donor visualization sheet of Example 4 was excluded from evaluation of decolorization time because it showed a color pattern in which the areas indicating the electron donor adhesion sites were decolorized and the colorant remained in other areas. Furthermore, Example 7 used the yellow fluorescent dye Pyranine 120 as the colorant. Due to the nature of Pyranine 120, it did not decolorize in 20 g of a 0.1% sodium hypochlorite aqueous solution, leaving the entire sheet yellow. However, by irradiating it with a black light, the areas where the artificial vomit was adhered became visible. Therefore, the electron donor visualization sheet of Example 7 was also excluded from evaluation of decolorization time.

[0104] (Bleaching ability other than stained areas) The bleaching ability of the areas that were decolorized by the bleaching solution was visually confirmed. If the area was bleached white, it was rated as "A." If the area was yellowed but the blue color was decolorized, it was rated as "B." If a faint blue color remained, it was rated as "C." If the blue color was not decolorized, it was rated as "D." Note that the electron donor visualization sheets of Examples 4 and 7 were excluded from the bleaching ability evaluation for the same reason as described in the explanation of "Decolorization time of areas other than those with stains."

[0105] (comprehensive evaluation) Based on the test results, an overall evaluation of the electron donor visualization sheets of each Example was conducted. Excellent practicality was evaluated as "A," next best as "B," then good and practical as "C," and impractical as "D." Table 6 shows the composition of the coloring liquid used for each sheet and the results of each evaluation.

[0106] [Table 6]

[0107] (Review of results) Considering all the evaluation results, the electron donor visualization sheets of Examples 1 to 6, which contained a blue dye, were all able to clearly visualize the areas where artificial vomit was present. In particular, Examples 1 to 3 showed more favorable results. The electron donor visualization sheets of Examples 1 and 3 were excellent in terms of disappearance speed, with the bleached areas disappearing in 30 seconds.

[0108] In the electron donor visualization sheet of Example 4, the areas where the artificial vomit was attached became transparent, while the other areas remained blue. The coloration state may differ from that of the other Examples due to the influence of the pH of the coloring solution, and the coloration state may change due to pH adjustment. Note that, in the electron donor visualization sheet of Example 4, the areas where the artificial vomit was attached and the other areas were visualized, so the overall evaluation was given a C.

[0109] Furthermore, the electron donor visualization sheet of Example 6 had a lighter blue color before the bleaching solution was applied compared to the other Examples. Therefore, the color development of the attached area after the bleaching solution was applied was slightly weaker, but visualization was possible, so the overall evaluation was given a C.

[0110] The electron donor visualization sheet of Example 7, which used a fluorescent dye, maintained its yellow color throughout even after being exposed to bleach, but when illuminated with black light, the areas where the dye was applied lit up clearly, demonstrating good sensitivity.

[0111] The electron donor visualization sheets of Examples 8 to 10 were prepared by adding a thickener or resin to a coloring liquid containing the colorant used in Example 3. The electron donor visualization sheets of Examples 8 to 10 exhibited slower colorant decolorization rates overall than the electron donor visualization sheet of Example 3, which used the same colorant. The electron donor visualization sheets of Examples 8 and 9 exhibited slightly reduced flexibility, but all exhibited good visualization performance. The electron donor visualization sheet of Example 10 exhibited slight color unevenness, but this did not hinder visualization of the adhesion area.

[0112] (Test 4: Test of colored liquid using oil-soluble dye) Next, a coloring solution of Example 11 was prepared using an oil-soluble dye to have the composition shown in Table 6, and an electron donor-visualizing porous body (electron donor-visualizing sheet) was prepared to conduct a visualization test of the electron donor-adhered areas. The materials used in the coloring solution are as follows:

[0113] (solvent) ·ethanol

[0114] (oil soluble dye) Solvent Blue 38 (VALIFAST® BLUE 1655, manufactured by Orient Chemical Industries, Ltd.)

[0115] (Preparation of electron donor visualization sheet) A nonwoven fabric (product name "Easy Waste Disposal Kit (High Absorbency Sheet)", manufactured by Kao Professional Services Co., Ltd.) was immersed in the coloring solution of Example 11 and then dried to create an electron donor visualization sheet.

[0116] (Exam contents) A white tile was used as the attachment surface for the electron donor. Liquid artificial vomit (a mixture containing pepsin, peptone, taurocholic acid, phospholipids, lecithin, mucin, amino acids, and a pH adjuster) was dropped onto the white tile as the electron donor to be visualized. The electron donor visualization sheet of Example 11 was placed on the tile with the liquid artificial vomit attached, and 40 g of bleaching solution (0.1% sodium hypochlorite aqueous solution) was poured on top of it. As in Test 3, the time required for bleaching was measured and each item was evaluated.

[0117] (Review of results) Example 11, which used an oil-soluble dye, required more bleaching solution than a water-soluble coloring agent, but was able to clearly visualize the areas where artificial vomit had adhered.

[0118] Although the present invention has been described above by taking the embodiments as examples, the present invention is not limited to the above-described embodiments and can be embodied in various forms. [Explanation of symbols]

[0119] 1 nonwoven fabric sheet 11 Colored part 12 Bleaching section C Vomiting center D electron donor

Claims

1. a porous material for visualizing an electron donor containing an electron donating colorant is placed on the surface of the electron donor to which the electron donor is attached; The electron donor visualization method comprises permeating the electron donor visualization porous body with a bleaching component comprising an electron acceptor.

2. 2. The electron donor visualization method according to claim 1, wherein the electron donor visualization porous body is placed over the surface of the electron donor to which the electron donor is attached, and a bleaching solution containing the bleaching component is poured over the porous body to allow the bleaching component to penetrate into the porous body.

3. 2. The electron donor visualization method according to claim 1, wherein a bleaching solution containing the bleaching component is applied to the surface of the electron donor, the electron donor visualization porous body is then placed over the bleaching solution, and the bleaching component is allowed to penetrate the porous body.

4. 2. The electron donor visualization method according to claim 1, wherein the electron donor visualization porous body is placed over the surface of the electron donor, and a powdered bleaching agent containing the bleaching component is sprayed over the surface, and then a liquid is poured over the porous body to allow the bleaching component to penetrate the porous body.

5. 2. An electron donor-visualizing porous body containing an electron donor colorant, which is used in the electron donor visualization method according to claim 1.

6. An electron donor visualization kit comprising a combination of the electron donor visualization porous body according to claim 5 and a bleaching agent containing the bleaching component.

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