Deodorization methods for rooms where the deceased has been left unattended

Abstract

To provide a deodorization method for a room in which a deceased person has been left, the method allowing simple construction work, presenting no problem in the work environment, exhibiting a sufficient deodorizing effect, and avoiding odor recurrence.SOLUTION: A deodorization method for a room in which a deceased person has been left, the method includes: a disinfectant solution spraying step of spraying into the room a liquid containing at least one disinfectant selected from the group consisting of stabilized chlorine dioxide, hypochlorous acid, sodium hypochlorite, and hydrogen peroxide; a filth cleaning step of cleaning filth containing one or more of body fluid, excreta, and skin fragments; a dismantling step of dismantling portions where the filth has adhered or infiltrated; an ozone fumigation step of spraying ozone into the room after the dismantling step; and a deodorizing sheet covering step of heat-press bonding a multilayer deodorizing sheet having a deodorizing layer and a heat seal layer onto portions where odor substances remain after the ozone fumigation step.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to a method for deodorizing rooms where a deceased person has been left unattended, such as after a solitary death. [Background technology]

[0002] A lonely death is when a person dies alone without anyone to witness their passing. In recent years, the number of lonely deaths has increased due to the rise of nuclear families, the aging population, and the weakening of community ties, becoming a social problem.

[0003] In rooms where a deceased person has been left unattended, the room becomes soiled and emits a strong odor due to the decomposition of the body, bodily fluids, and excrement. In such cases, it is necessary to clean the room, thoroughly deodorize it, and restore it to its original condition.

[0004] A known method for deodorizing a room where a deceased person has been left unattended includes a waste cleaning operation to clean up waste selected from bodily fluids, feces, and urine; a demolition operation to dismantle the areas where the waste is attached; an ozone fumigation operation to spray ozone into the room after the demolition; and a coating operation to cover the areas where waste remains exposed during the demolition with paint after the ozone fumigation (Patent Document 1). However, the method in Patent Document 1 has the drawback that the paint coating operation after the ozone fumigation is complicated and time-consuming, and because the paint used is essentially an oil-based primer, the working environment is poor due to the odor of organic solvents in the paint, the deodorizing effect on the room is not always sufficient, and there is a problem that the odor in the room may reappear.

[0005] Furthermore, a method for deodorizing a room where a deceased person has been left, which provides a sufficiently high deodorizing effect, prevents the re-generation of odors after deodorization, and offers excellent working conditions during paint coating work, is known (Patent Document 2). This method includes: a disinfectant spraying step of spraying a liquid containing at least one disinfectant selected from stabilized chlorine dioxide, hypochlorous acid, and sodium hypochlorite into the room; a waste cleaning step of cleaning up waste containing one or more of bodily fluids, excrement, or skin fragments; a demolition step of dismantling areas to which waste has adhered or penetrated; an ozone fumigation step of spraying ozone into the room after the demolition step; and a coating step of applying and covering the areas exposed in the demolition step with a water-based epoxy resin paint after the ozone fumigation step. However, the method in Patent Document 2 also has the drawback that the coating step of applying the water-based epoxy resin paint after the ozone fumigation step is complicated and time-consuming. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Patent No. 6889954 [Patent Document 2] Japanese Patent Publication No. 2023-145305 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] The object of the present invention is to provide a method for deodorizing a room where a deceased person has been left, which overcomes the drawbacks of the prior art described above, is easy to perform, does not cause problems with the working environment, has sufficient deodorizing effect, and does not cause odor to re-emission. [Means for solving the problem]

[0008] As a result of diligent research to achieve the above objective, the inventors have found that by applying a specific deodorizing sheet to areas where odor-causing substances remain after the cleaning, demolition, and ozone fumigation processes of a room where a deceased person has been left, the complicated and time-consuming paint coating process becomes unnecessary, the construction work is extremely simple, the construction time is significantly reduced, there are no problems with the working environment, the room deodorizing effect is sufficient, and there is no re-generation of odors.

[0009] Based on the above findings, the inventors conducted further studies and, as a result, completed the present invention. The present invention provides the following method for deodorizing a room where a deceased person has been left unattended.

[0010] 1. A method for deodorizing a room where a deceased person has been left unattended, including the following steps: A disinfectant spraying process involves spraying a liquid containing at least one disinfectant selected from the group consisting of stabilized chlorine dioxide, hypochlorous acid, sodium hypochlorite, and hydrogen peroxide into a room; A waste cleaning process that involves cleaning up waste containing one or more of the following: bodily fluids, excrement, or skin flakes; A demolition process that involves dismantling areas where dirt or debris has adhered or permeated; Ozone fumigation is a process in which ozone is sprayed into the room after the demolition process. A deodorizing sheet coating process is performed after the ozone fumigation process, in which a multi-layer deodorizing sheet having a deodorizing layer and a heat-sealing layer is heat-pressed onto the areas where odor-causing substances remain.

[0011] 2. The deodorization method described in item 1 above, further comprising a step of spraying ozone into the room to suppress odors before the waste cleaning step.

[0012] 3. The deodorizing method according to item 1 above, further comprising the step of spraying or applying a deodorizer containing at least one enzyme selected from protease, lipase, amylase, and cellulase before the ozone fumigation step.

[0013] 4. The deodorization method described in item 1 above, wherein the ozone fumigation process is carried out by exposing the room to ozone at a temperature of 20-30°C, a humidity of 60-100%, and an ozone concentration of 1-30 ppm.

[0014] 5. The deodorizing construction method according to item 1 above, wherein the deodorizing layer of the multi-layer deodorizing sheet used in the deodorizing sheet coating step is a layer consisting of one or two layers selected from the group consisting of an extended nylon resin layer, a nylon resin layer, an extended polyethylene terephthalate resin layer, and a polyethylene terephthalate resin layer.

[0015] 6. The deodorizing construction method described in item 5 above, wherein at least one layer selected from the group consisting of an oriented nylon resin layer, a nylon resin layer, an oriented polyethylene terephthalate resin layer, and a polyethylene terephthalate resin layer has an aluminum vapor deposition coating on its surface, a silica vapor deposition coating, or an aluminum oxide vapor deposition coating.

[0016] 7. The deodorizing construction method according to item 5 above, wherein at least one layer selected from the group consisting of an oriented nylon resin layer, a nylon resin layer, an oriented polyethylene terephthalate resin layer, and a polyethylene terephthalate resin layer is coated on its surface with an ethylene vinyl alcohol copolymer resin, a polyvinyl alcohol resin, or a polyvinylidene chloride resin.

[0017] 8. The deodorizing construction method according to item 1 above, wherein the deodorizing layer of the multi-layer deodorizing sheet used in the deodorizing sheet coating step is a layer formed by co-extruding a nylon resin and an ethylene vinyl alcohol copolymer resin, or a layer formed by co-extruding a nylon resin and a metaxylylene adipamide resin.

[0018] 9. The heat-sealing layer of the multilayer deodorant sheet used in the deodorant sheet covering step is a linear low-density polyethylene resin layer, a low-density polyethylene resin layer, an ethylene vinyl acetate copolymer resin layer, an ethylene ethyl acrylate copolymer resin layer, an ethylene acrylic acid copolymer resin layer, an ethylene methyl methacrylate copolymer resin layer, an ethylene methacrylic acid copolymer resin layer, or an ionomer resin layer. The deodorizing construction method according to Item 1 above.

[0019] 10. The piercing strength of the multilayer deodorant sheet used in the deodorant sheet covering step is 10 N or more. The deodorizing construction method according to Item 1 above.

Effects of the Invention

[0020] According to the deodorizing construction method for the room where the deceased of the present invention was left unattended, the following remarkable effects are achieved.

[0021] (1) After the dirt cleaning step, the dismantling step, and the ozone fumigation step of the room where the deceased was left unattended, by a very simple construction operation of heat-pressing a specific deodorant sheet on the location where odor substances remain, an excellent deodorizing effect is exerted in that the odor derived from the odor substances remaining in the location where dirt has adhered or penetrated can be effectively blocked, and furthermore, there is no recurrence of odor.

[0022] (2) Also, a complicated and time-consuming paint coating step is unnecessary, the construction operation is very simple, the construction time can be significantly shortened, and furthermore, the poor working environment when using an oil-based paint is eliminated.

[0023] (3) Therefore, according to the deodorizing construction method of the present invention, it is excellent in workability and the deodorizing effect of the room, can restore the room to its original state in a short time with significantly reduced labor and cost, and moreover, can suitably maintain the utilization value and asset value of the room by being able to restore the room to its original state in this way.

Brief Description of the Drawings

[0024] [Figure 1] It is a cross-sectional view of an example of the multilayer deodorant sheet used in the deodorizing construction method of the present invention. [Figure 2] This is a cross-sectional view of another example of a multi-layer odor-proof sheet used in the odor-eliminating construction method of the present invention. [Modes for carrying out the invention]

[0025] Deodorization methods for rooms where the deceased has been left unattended The present invention provides a method for deodorizing a room where a deceased person has been left unattended. This method requires sequentially performing the following steps: disinfectant spraying, waste cleaning, demolition, ozone fumigation, and odor-proof sheet covering. Furthermore, if necessary, an odor suppression step before the waste cleaning step and a deodorizer spraying step before the ozone fumigation step can be performed to achieve a highly effective deodorization effect with good workability and no recurrence of odor.

[0026] The room where the deceased was left unattended The type of room in which a deceased person is left unattended, which is the target of the deodorization method of the present invention, is not particularly limited and includes various types of rooms such as residences, apartment buildings, shops, inns, restaurants, factories, warehouses, and garages. Furthermore, the material of the room to be deodorized is not particularly limited and may be wood, concrete, or any other material. The size of the room to be deodorized is also not particularly limited, but the minimum area of ​​the room is, for example, 10 m². 2 Furthermore, 20m 2 Furthermore, another 50m 2 The above rooms have an upper limit of area, for example, 200m². 2 Below, and furthermore, 120m 2 Below, and furthermore, 80m 2 The following rooms can be targeted for deodorization.

[0027] Furthermore, there are no particular limitations regarding the length of time the deceased's body has been left unattended. For example, rooms where the deceased's body has been left unattended for several days to a week or more, or even two weeks or more, or even a month or more, can be targeted for deodorization.

[0028] The deodorizing construction method of the present invention will be described below in the following order: disinfectant spraying step, odor suppression step, waste cleaning step, demolition step, deodorizer spraying or coating step, ozone fumigation step, and deodorizing sheet covering step.

[0029] (1) Disinfectant spraying process In the method of the present invention, a disinfectant spraying step is performed before the waste cleaning step, from the viewpoint of preventing infectious diseases. The disinfectant spraying step is a step of spraying disinfectant on the room where the deceased was left.

[0030] As a disinfectant solution, it is preferable to use a liquid formulation containing a disinfectant selected from the group consisting of stabilized chlorine dioxide, hypochlorous acid, sodium hypochlorite, and hydrogen peroxide, either individually or in a mixture of two or more. By spraying a liquid formulation containing at least one disinfectant selected from stabilized chlorine dioxide, hypochlorous acid, sodium hypochlorite, and hydrogen peroxide, bacteria, viruses, etc. in the room can be effectively removed, thereby preventing infectious diseases and contributing to room deodorization.

[0031] Furthermore, among disinfectants, using a solution containing sodium hypochlorite is particularly preferable because it is highly effective in removing bacteria, viruses, and other microorganisms in the room. An example of a solution with sodium hypochlorite as its main component is "Haiter" (manufactured by Kao Corporation).

[0032] When using a liquid agent containing sodium hypochlorite, the concentration of sodium hypochlorite is preferably 500 PPM or higher, more preferably 700 PPM or higher, and even more preferably 900 PPM or higher. By spraying a liquid agent containing sodium hypochlorite at such a lower limit or higher, bacteria, viruses, etc. in the room can be removed more effectively, thereby preventing infectious diseases and contributing to room deodorization.

[0033] Furthermore, as a disinfectant, it is preferable to use a liquid containing hydrogen peroxide, particularly a so-called accelerated hydrogen peroxide solution, which is prepared by dissolving hydrogen peroxide, surfactant, solvent, organic acid, phosphoric acid, etc., in water, because it can quickly remove bacteria, viruses, etc., from the room. Accelerated hydrogen peroxide can remove bacteria and viruses by spraying or applying a stock solution containing about 0.5% by weight of hydrogen peroxide and leaving it for about 0.5 to 5 minutes. An example of an accelerated hydrogen peroxide solution is "Oxylight" (manufactured by C-Byes Co., Ltd.).

[0034] (2) Odor suppression process In the method of the present invention, (1) after the disinfection step, a step of spraying ozone into the room to suppress odors may be performed as needed. The odor suppression step is a step of spraying ozone into the room using an ozone fumigation device to suppress odors. By spraying ozone before the waste cleaning step, viruses can be inactivated and odors can be temporarily suppressed, allowing workers to clean efficiently and also serving as a measure to prevent problems with neighbors.

[0035] This odor suppression step is preferable to perform ozone spraying after wiping away the stabilized chlorine dioxide, hypochlorous acid, sodium hypochlorite, or hydrogen peroxide used in the disinfection step, because if a large amount of these highly oxidizing compounds remains, it can put a heavy burden on the ozone fumigation equipment and cause malfunctions. This odor suppression step is preferably performed by ozone fumigation at an ozone concentration of about 1 to 20 ppm for about 30 to 90 minutes, thereby exposing the area to ozone.

[0036] For ozone fumigation, known ozone fumigation equipment can be used. Preferred ozone fumigation equipment includes ActivO-J (manufactured by Kai Corporation), Super Activo (manufactured by Kai Corporation), Panther-J (plasma ozone deodorizer, manufactured by Ecozone Co., Ltd.), and others.

[0037] (3) Waste Cleaning Process The waste removal process involves cleaning up bodily fluids such as blood, lymph, and saliva; excrement such as feces and urine; and any other type of waste including skin fragments. By removing waste through the waste removal process, the subsequent ozone fumigation process ensures that the room where the deceased was left is properly deodorized.

[0038] The waste removal process involves removing bodily fluids, excrement, skin fragments, etc., adhering to floors, walls, fixtures, doors, windows, window frames, etc., using tongs or spatulas, then applying detergent and scrubbing with a brush. For the detergent, alkaline detergents are preferable due to their high cleaning effectiveness, and strong alkaline detergents are even preferable. However, if there is a urine odor, it is preferable to also use an acidic detergent. Furthermore, in cases of hoarder houses with multiple odor-causing substances, it is preferable to remove the garbage first, and then use a neutral detergent or an acidic detergent for cleaning.

[0039] As alkaline detergents, those with a pH in the range of 8 to 11 are preferred, and examples include liquids containing sodium sesquicarbonate, baking soda, etc. As strong alkaline detergents, those with a pH of 12 or higher are preferred, and examples include liquids containing caustic soda, etc. As acidic detergents, those with a pH in the range of 1.5 to 4 are preferred, and examples include liquids containing acidic substances such as citric acid or surfactants.

[0040] (4) Demolition process The demolition process involves dismantling areas where waste has adhered or permeated. While the waste cleaning process often fails to completely remove odors, dismantling the surface layer of the room where the deceased was left allows for the complete removal of odors from the dismantled areas.

[0041] In the demolition process, specifically, wallpaper, baseboards, cushion flooring, etc. are removed, and floorboards, hardwood flooring, tatami mats, etc. are removed to expose the room's pillars, beams, foundation, framework, etc. on the surface. It is preferable to clean these exposed parts in the same manner as in the aforementioned waste removal process. This demolition process allows for more reliable deodorization of the room where the deceased was left during the subsequent ozone fumigation process.

[0042] (5) Deodorizer spraying or coating process In the method of the present invention, (4) after the demolition step, it is preferable to perform a deodorant spraying or coating step. The deodorant spraying or coating step is a step in which a deodorant containing at least one enzyme selected from protease, lipase, amylase, and cellulase is sprayed or coated on the floor, walls, windows, ceiling, etc. of the room, and parts exposed during the demolition step, before the subsequent ozone fumigation. The deodorant further preferably contains an alkaline detergent such as sodium sesquicarbonate or a surfactant. After spraying or coating the deodorant containing the above enzymes, washing as appropriate can decompose proteins, fats, starches, and fibers, enabling efficient deodorization. Furthermore, the deodorant spraying or coating and the subsequent ozone fumigation can be combined to produce a synergistic effect in deodorization.

[0043] The enzymes contained in deodorants do not necessarily need to be all four types: protease, lipase, amylase, and cellulase. Depending on the situation, one type may be used, or a combination of two or more types may be used.

[0044] Furthermore, the deodorant is preferably in liquid form. Being a liquid allows the deodorant to be efficiently sprayed or applied to floors, walls, etc.

[0045] Examples of deodorants containing the above enzymes include GranbioAir (manufactured by Kai Corporation), GranbioPro (manufactured by Kai Corporation), and SesquiPlus (manufactured by Sekken Hyakka Co., Ltd.).

[0046] (6) Ozone fumigation process In the method of the present invention, an ozone fumigation step is performed after (4) the demolition step, or after (4) the demolition step and (5) the deodorizer spraying or coating step. The ozone fumigation step is a step of spraying ozone into the room using an ozone fumigation device. By spraying ozone, the inside of the room is exposed to ozone. By performing the ozone fumigation step at this stage, odors can be efficiently decomposed and removed after the dirt has been cleaned and removed.

[0047] In this stage of the ozone fumigation process, it is preferable to spray ozone at a slightly higher temperature when the floor, walls, etc. are damp and humid due to cleaning after the demolition process or by spraying or applying a deodorant, as this improves deodorization efficiency. Specifically, a humidity of 60-100% is preferable, and 70-100% is more preferable. Also, a temperature of 20-30°C is preferable, and 24-28°C is more preferable. If temperature and humidity adjustment is necessary, air conditioners, heaters, humidifiers, etc. can be used as appropriate.

[0048] The ozone fumigation process at this stage is preferably carried out by exposing the area to ozone at an ozone concentration of approximately 1 to 30 ppm. Furthermore, to prevent the ozone concentration from becoming too high and the resulting odor from leaking into the surrounding area, it is preferable to perform ozone spraying intermittently. For example, ozone spraying may be performed for approximately 0.5 to 3 hours, followed by a 1 to 4-hour pause, and these can be repeated as needed. The ozone exposure time is usually preferably around 1 to 24 hours.

[0049] The various ozone fumigation devices described above can be used in the ozone fumigation process.

[0050] (7) Odor-proof sheet coating process (6) After the ozone fumigation process, (5) the process involves heat-pressing a multi-layer deodorizing sheet having a deodorizing layer and a heat-sealing layer onto areas exposed during the demolition process where odorous substances remain. By heat-pressing the multi-layer deodorizing sheet onto areas exposed during the demolition process where odorous substances remain, odors originating from exposed parts of the room such as pillars, beams, foundations, and framework can be reliably blocked. Here, areas where odorous substances remain include areas where dirt has been cleaned and removed, but odorous substances remain or are thought to remain due to the penetration of dirt, etc. In addition to the areas exposed during demolition, the multi-layer deodorizing sheet is also applied to areas where dirt is attached, which have been cleaned, but have not been demolished (floor surfaces, walls, etc.). PreventionIt is preferable to heat-seal and cover the area with an odor-blocking sheet to block any remaining odor.

[0051] Here, the material of the building material such as the columns, beams, foundation, framework, floor, and walls of a room, which are the surfaces to which the multi-layer deodorizing sheet is heat-pressed, is not particularly limited, and examples include concrete, wood, gypsum board, and plastic.

[0052] In the method of the present invention, it is important to heat-press a multi-layer deodorizing sheet having a deodorizing layer and a heat-sealing layer onto the areas where odor-causing substances remain after the ozone fumigation process. That is, by performing the deodorizing sheet coating process, odors are reliably blocked, a sufficiently high deodorizing effect is obtained, and an excellent deodorizing effect is achieved in that odors do not reappear after the deodorizing work is completed. In addition, since no paint coating work is performed, there are no odors from organic solvents, resulting in a good working environment. Furthermore, since it is only necessary to heat-press the deodorizing sheet onto specific areas, the working time can be significantly reduced, and the work is simple and easy to do.

[0053] The odor-blocking sheet used in the present invention is a multi-layer odor-blocking sheet having a film structure with at least two layers: an odor-blocking layer that suppresses odors by using a highly fragrance-retaining material with properties that make it difficult for odors to permeate the adherend such as building materials, so that odors that have permeated the adherend are not released; and a heat-seal layer that can be adhered to the adherend by heat and pressure even if the surface of the building material has irregularities. Such an odor-blocking sheet can be made by known methods, such as the dry lamination method which involves bonding with an adhesive, the extrusion lamination method which involves melting a resin and bonding, and processing methods which combine these.

[0054] Figure 1 shows a cross-sectional view of an example of a multi-layer deodorizing sheet used in the deodorizing construction method of the present invention, where 1 represents the deodorizing sheet, 2 represents the deodorizing layer, and 3 represents the heat-seal layer. Figure 2 shows a cross-sectional view of another example of a multi-layer deodorizing sheet used in the deodorizing construction method of the present invention, in which the deodorizing layer consists of two layers, where 1 represents the deodorizing sheet, 2a represents deodorizing layer I, 2b represents deodorizing layer II, 2 represents the deodorizing layer consisting of 2a and 2b, and 3 represents the heat-seal layer. Furthermore, in the multi-layer deodorizing sheet used in the method of the present invention, the thickness of the deodorizing layer is usually preferably about 10 to 100 μm, and the thickness of the heat-seal layer is usually preferably about 20 to 150 μm.

[0055] The odor-proof layer of the multi-layer odor-proof sheet used in this invention also functions as a base layer, and uses a highly fragrance-retaining resin layer that has the property of being difficult for odors to permeate. For example, polyethylene terephthalate resin, nylon resin (polyamide resin), etc., which have the property of being difficult for odors to permeate due to the molecular structure of the resin component itself can be used. The fragrance retention ability of these resins can be enhanced by stretching. Furthermore, the fragrance retention (odor-proof effect) can be further enhanced by applying aluminum vapor deposition, silica vapor deposition, or aluminum oxide vapor deposition to the surface of these resin films.

[0056] Furthermore, by coating the surface of layers such as stretched nylon resin layers, stretched polyethylene terephthalate resin layers, nylon resin layers, and polyethylene terephthalate resin layers with highly fragrance-retaining resins such as ethylene vinyl alcohol copolymer resin, polyvinyl alcohol resin, or polyvinylidene chloride resin, the fragrance retention (deodorizing effect) can be further enhanced.

[0057] Furthermore, the odor-proof layer of the multi-layer odor-proof sheet may be, for example, a layer formed by co-extruding a nylon resin and an ethylene vinyl alcohol copolymer resin, or a layer formed by co-extruding a nylon resin and a metaxylylene adipamide resin, which can further enhance the fragrance retention (odor-proof effect).

[0058] Preferred specific examples of the above-mentioned odor-proof layer include, for example, a stretched nylon resin layer, a silica-deposited stretched nylon resin layer, an aluminum oxide-deposited stretched nylon resin layer, a polyvinylidene chloride-coated stretched nylon resin layer, a stretched polyethylene terephthalate resin layer, a silica-deposited stretched polyethylene terephthalate resin layer, an aluminum oxide-deposited stretched polyethylene terephthalate resin layer, and a polyvinylidene chloride-coated polyethylene terephthalate resin layer. Furthermore, the laminated resin layer may consist of two or more resin layers selected from these resin layers. Examples of cases consisting of two or more laminated resin layers include a two-layer structure of an oriented polyethylene terephthalate resin layer and an oriented nylon resin layer, a two-layer structure of a silica or aluminum oxide vapor-deposited oriented polyethylene terephthalate resin layer and an oriented nylon resin layer, a three-layer structure of two polyvinylidene chloride coated polyethylene terephthalate resin layers and an oriented nylon resin layer, a co-extruded three-layer film in which an ethylene vinyl alcohol copolymer resin is laminated between nylon resins, and a co-extruded three-layer film in which a metaxylylene adipamide resin is laminated between nylon resins.

[0059] The heat-seal layer of the multi-layer deodorizing sheet used in the present invention is designed to conform to the uneven surface of the adherend, such as building materials. During heat sealing, the surface of the heat-seal layer in contact with the adherend of the deodorizing sheet is melted, and pressure is applied so that the resin softened by heat flows into the gaps in the uneven surface of the adherend. As the temperature of the resin decreases, it hardens and adheres to the adherend surface. Therefore, it is necessary to select a resin with high fluidity when melted for the heat-seal layer. Examples of such heat-seal layers include linear low-density polyethylene resin layers; low-density polyethylene resin layers; ethylene vinyl acetate copolymer resin layers, ethylene ethyl acrylate copolymer resin layers, ethylene acrylic acid copolymer resin layers, ethylene methyl methacrylate copolymer resin layers, ethylene methacrylic acid copolymer resin layers, ionomer resin layers, and other ethylene-based copolymer resin layers. The above-mentioned ionomer resin is obtained by reacting ethylene methacrylic acid copolymer resin with metal ions such as sodium ions to partially crosslink by ionic bonding.

[0060] Furthermore, in the heat-sealing process, since the surface of the object to be adhered is uneven, it is desirable that the multi-layer deodorizing sheet has high puncture strength to prevent the film from tearing during sealing. Specifically, the puncture strength of the multi-layer deodorizing sheet used in the deodorizing sheet coating process is usually preferably around 10N or higher.

[0061] Furthermore, the multi-layer deodorizing sheet used in the deodorizing sheet coating process exhibits excellent adhesion to the surface of the substrate because the resin of the heat-seal layer flows into the gaps of the uneven surface of the substrate and hardens, resulting in a tight bond. Therefore, it is generally not possible for the sheet to peel off after deodorization and for odors to re-emerge. The adhesion strength of the multi-layer deodorizing sheet used in the deodorizing sheet coating process is not particularly limited and varies depending on the material and surface condition of the substrate. However, for example, if the substrate is wood and flat, it is generally preferable to have an adhesion strength of approximately 3N / 15mm or more.

[0062] When heat-pressing a multi-layer deodorizing sheet onto a substrate, it is preferable to clean the substrate to improve the adhesion of the deodorizing sheet. For example, if cushion flooring (CF) has been removed, it is preferable to remove the adhesive portion of the CF from the substrate and then polish the surface. If the substrate is concrete, it is preferable to heat the substrate using a heat gun. Next, place the deodorizing sheet on the substrate so that it is in close contact with the substrate without any air trapped inside, and then heat-press it using an iron or the like at a temperature of approximately 140°C to 240°C so that the heat seal layer melts and adheres to the substrate.

[0063] Thus, by performing the deodorizing treatment method for rooms where a deceased person has been left unattended according to the present invention, an excellent deodorizing effect can be obtained that is simple, quick, easy to work with, sufficiently high, and prevents the recurrence of odors. [Examples]

[0064] The present invention will be described in more detail below with reference to examples, but the present invention is not limited in any way by these examples.

[0065] The monitoring of the deodorization work environment and the multi-layer deodorizing sheets used in each example are as follows.

[0066] Deodorization work environment and odor monitoring method for rooms where the deceased was left unattended Using the indoor environment IoT sensor pod "POD2" (manufactured by AnalyticSense Co., Ltd.), the temperature, humidity, ozone (O3) concentration, hydrogen sulfide (H2S) concentration, and ammonia (NH3) concentration of the room being treated for deodorization were monitored from the start to the end of the treatment. Of these, the hydrogen sulfide (H2S) concentration and ammonia (NH3) concentration were used as indicators of the room's odor. According to "POD2," each of the above items can be continuously monitored using a smartphone app in a Wi-Fi environment.

[0067] Multi-layer odor-proof sheet In Example 1, a two-layer odor-proof sheet A was used as the multi-layer odor-proof sheet, as shown in Figure 1, in which the odor-proof layer 2 was a 50 μm thick stretched polyethylene terephthalate resin layer and the heat-seal layer 1 was a 50 μm thick ethylene vinyl acetate copolymer resin layer. The puncture strength of this two-layer odor-proof sheet A was 22.8 N.

[0068] In Example 2, a three-layer odor-proof sheet B was used as the multi-layer odor-proof sheet. As shown in Figure 2, the odor-proof layer 2a was a 12 μm thick stretched polyethylene terephthalate resin layer, the odor-proof layer 2b was a 15 μm thick stretched nylon resin layer, and the heat-seal layer 1 was an 80 μm thick linear low-density polyethylene resin layer. The puncture strength of this three-layer odor-proof sheet B was 15.5 N.

[0069] Example 1 Case 1 The rooms to be treated with deodorization are those with an area of ​​15m². 2 The scene of the solitary death of a man in a one-room apartment was that his body had been left unattended for three weeks after his death.

[0070] Situation at the start of deodorization work The deceased was found collapsed in the center of the room. Bodily fluids had seeped through the cushion flooring (CF) and into the concrete foundation, resulting in a very strong odor. Before deodorization work, the odor levels were 4.2 ppm of hydrogen sulfide and 1.9 ppm of ammonia.

[0071] (1) Disinfectant spraying process As a disinfectant, use undiluted "Oxylight" (manufactured by Cif Co., Ltd.) (0.5% accelerated hydrogen peroxide) to spray the entire room, including the ceiling, walls, and floor, using a pressurized electric sprayer, covering a room area of ​​10m². 2 We sprayed approximately 1 liter per area and left it for 10 minutes to disinfect.

[0072] (2) Odor suppression process After thoroughly wiping off the Oxylite sprayed during the disinfectant application process, 7500 mg / hr of ozone was sprayed for approximately 60 minutes using an ozone fumigation device, Panther-J (manufactured by Kai Corporation), to suppress odors. The ozone concentration was 4.5 ppm.

[0073] (3) Waste Cleaning Process The cushion flooring contaminated with bodily fluids, excrement, skin flakes, and other waste was removed. A strong alkaline detergent (caustic soda solution) with a pH of 13 or higher was sprayed onto the concrete foundation where bodily fluids had adhered and permeated, and the area was further cleaned using brushes and other tools. In addition, baseboards, fixtures, and equipment (kitchen cabinets, etc.) that had absorbed odors were also cleaned with an alkaline detergent (sesquicarbonate soda solution).

[0074] (4) Demolition process To ensure a more thorough deodorization, the surface layers of the room were dismantled, and the wallpaper, baseboards, cushion flooring, and (partially) plasterboard were removed, along with the floorboards and hardwood flooring. Furthermore, the floorboards beneath the cushion flooring were also dismantled. The exposed concrete foundation and bodily fluids that had flowed onto the walls were cleaned and removed.

[0075] (5) Deodorizer spraying or coating process A deodorant (manufactured by Sekken Hyakkaten Co., Ltd., "Sesqui Plus"), which is an aqueous sesquicarbonate solution containing four types of enzymes, protease, lipase, amylase, and cellulase, was sprayed on the floor surface, wall surface, windows, ceiling, etc. inside the room, and the next process was entered after 10 minutes.

[0076] (6) Ozone fumigation process After spraying the deodorant, with the floor surface, wall surface, etc. being wet, the air conditioner was operated, a humidifier was installed, the temperature was maintained at 24 - 27°C, and the humidity was maintained at 75% or more. Using an ozone fumigation device Panther-J (manufactured by Kaiko Corporation), ozone at 7500 mg / hr was sprayed for about 1 hour and then stopped for 2 hours, and this cycle was repeated twice to maintain the ozone concentration at 7 - 15 ppm for ozone fumigation.

[0077] (7) Odor-proof sheet coating process To enhance the adhesion of the anti-odor sheet to the exposed basic concrete on which body fluids had adhered and penetrated after removing the cushion floor on the floor surface, a heat gun (temperature 300°C) was applied for about 3 minutes to warm the concrete surface. Next, a portion with dimensions of 80 cm in length and 40 cm in width (0. **32 m** 2 ) of the two-layer anti-odor sheet A (80 cm × 40 cm) was closely attached with the heat-sealing layer surface so that no air could enter, and while pressing the entire surface with an iron (temperature 220°C) for about 3 minutes, heat-pressure bonding was performed. By covering with this anti-odor sheet, the odor was completely eliminated.

[0078] Odor levels after deodorization work is completed. The odor after the deodorization construction was 0 ppm for hydrogen sulfide and 0 ppm for ammonia. Also, no odor due to the body fluids of the deceased person, etc. was felt at all.

[0079] Odor situation one month after the completion of deodorization work. One month after the completion of the deodorization construction, the odor was 0 ppm for hydrogen sulfide and 0 ppm for ammonia. Also, no odor due to the body fluids of the deceased person, etc. was felt at all.

[0080] Example 2 Case Study 2 The deodorization work was to be carried out in a 6-tatami mat Japanese-style room on the second floor of a two-story detached house with a 3DK layout. The room was the scene of a man's solitary death, and the body had been left unattended for one month after death. The rooms to be deodorized were the hallway and the 6-tatami mat Japanese-style room on the second floor, with an area of ​​35m². 2 That was the case.

[0081] Situation at the start of deodorization work The deceased was found dead on the tatami mats of a 6-tatami room on the second floor, with bodily fluids seeping into three tatami mats. The fluids had seeped through the tatami and into the plywood foundation, producing a very strong odor. The fluids had also flowed onto the threshold, and a strong odor had spread throughout the house. Before deodorization work, the odor levels were 5.8 ppm of hydrogen sulfide and 3.8 ppm of ammonia.

[0082] (1) Disinfectant spraying process As a disinfectant, "Hyter" (manufactured by Kao Corporation) was diluted with water to create a solution containing 1000 ppm of sodium hypochlorite. This solution was then sprayed throughout the entire room, including the ceiling, walls, and floor, using a pressurized electric sprayer, covering an area of ​​35 m². 2 Approximately 1.8 liters were sprayed per area to disinfect.

[0083] (2) Odor suppression process After thoroughly wiping away the sodium hypochlorite sprayed during the disinfectant application process, 7500 mg / hr of ozone was sprayed for approximately 90 minutes using an ozone fumigation device, Panther-J (manufactured by Kai Corporation), to expose the room to ozone and suppress odors. The ozone concentration was 5-10 ppm.

[0084] (3) Waste Cleaning Process Dirt adhering to the tatami mats and thresholds was removed using tongs and a spatula. Each tatami mat was placed in a tatami bag (made of plastic), securely sealed with masking tape, and removed. After the tatami mats were removed, the thresholds and the plywood panels beneath the tatami mats were cleaned with a strong alkaline detergent (caustic soda solution) with a pH of 13 or higher. After thoroughly wiping off the alkaline detergent, the areas with a urine odor were also cleaned with an acidic detergent (aqueous solution containing citric acid and surfactant). In addition, the room's pillars, windows, and window frames were cleaned with an alkaline detergent (sodium sesquicarbonate solution).

[0085] (4) Demolition process In this case, a large amount of bodily fluids had soaked into the plywood beneath the removed tatami mats, so the plywood was dismantled and removed. Afterwards, the pillars, beams, and the foundation concrete that had been soaked with bodily fluids were cleaned using an alkaline detergent (caustic soda solution).

[0086] (5) Deodorizer spraying or coating process A deodorant solution containing four types of enzymes—protease, lipase, amylase, and cellulase—was sprayed onto the floor, walls, windows, ceiling, etc. of the room (Sesquiplus, manufactured by Soap Department Co., Ltd.). After 10 minutes, the next step was taken.

[0087] (6) Ozone fumigation process After spraying the deodorizer, the floor and walls were damp. Since there was no air conditioner, an electric heater and humidifier were installed to maintain the temperature at 24-27°C and the humidity at over 70%. Using an ozone fumigation device, Panther-J (manufactured by Kai Corporation), 7500 mg / hr of ozone was sprayed for approximately 90 minutes, followed by a 3-hour stop. This cycle was repeated twice to maintain the ozone concentration at 8-20 ppm, exposing the room to ozone for fumigation.

[0088] (7) Odor-proof sheet coating process To improve the adhesion of the odor-proofing sheet to the exposed foundation concrete, which had been contaminated and permeated with bodily fluids after the plywood was removed, a heat gun (temperature 300°C) was applied to the concrete surface for about 3 minutes. Next, to sufficiently cover the area where the bodily fluids had been present, a section measuring 160cm vertically and 80cm horizontally (1.28m) was applied. 2 Four of the aforementioned three-layer odor-proof sheets B (80cm x 40cm) were placed side by side without any gaps, and the heat-sealing surfaces of each sheet were pressed tightly together so that no air could enter. The sheets were then heated and pressed together with an iron (temperature 220°C) for about 12 minutes (3 minutes per sheet) while pressing down on the entire surface. Covering the sheet with these odor-proof sheets completely prevented any odor from rising.

[0089] Odor levels after deodorization work is completed. After the deodorization treatment, the levels of hydrogen sulfide and ammonia were 0 ppm. Furthermore, no odor from the deceased's bodily fluids was detected at all.

[0090] Odor situation one month after the completion of deodorization work. One month after the completion of the deodorization treatment, the levels of hydrogen sulfide and ammonia were 0 ppm. Furthermore, no odor from the deceased's bodily fluids was detected at all. [Industrial applicability]

[0091] The deodorizing method of the present invention is suitable for use in deodorizing rooms where a deceased person has been left unattended, as it is simple and quick to perform, does not cause problems with the working environment, has excellent deodorizing effects on rooms, prevents the re-generation of odors after deodorization, and allows for the room to be restored to its original condition.

Claims

1. The following is a method for deodorizing a room where a deceased person has been left unattended, including each of the steps listed below. A disinfectant spraying step involves spraying a liquid containing at least one disinfectant selected from the group consisting of stabilized chlorine dioxide, hypochlorous acid, sodium hypochlorite, and hydrogen peroxide into the room; A waste cleaning process that involves cleaning up waste containing one or more of the following: bodily fluids, excrement, or skin flakes; A demolition process that involves dismantling areas where dirt or debris has adhered or permeated; Ozone fumigation is a process in which ozone is sprayed into the room after the demolition process; A deodorizing sheet coating process is performed after the ozone fumigation process, in which a multi-layer deodorizing sheet having a deodorizing layer and a heat-sealing layer is heat-pressed onto the areas where odor-causing substances remain.

2. Furthermore, the deodorizing method according to claim 1, wherein before the waste cleaning process, a step is performed to suppress odors by spraying ozone into the room.

3. Furthermore, the deodorizing method according to claim 1, further comprising the step of spraying or applying a deodorizer containing at least one enzyme selected from protease, lipase, amylase, and cellulase before the ozone fumigation step.

4. The deodorizing method according to claim 1, wherein the ozone fumigation step is carried out by exposing the room to ozone at a temperature of 20 to 30°C, a humidity of 60 to 100%, and an ozone concentration of 1 to 30 ppm.

5. The deodorizing method according to claim 1, wherein the deodorizing layer of the multi-layer deodorizing sheet used in the deodorizing sheet coating step is a layer consisting of one or two layers selected from the group consisting of an extended nylon resin layer, a nylon resin layer, an extended polyethylene terephthalate resin layer, and a polyethylene terephthalate resin layer.

6. The deodorizing method according to claim 5, wherein at least one layer selected from the group consisting of an oriented nylon resin layer, a nylon resin layer, an oriented polyethylene terephthalate resin layer, and a polyethylene terephthalate resin layer is a layer whose surface is subjected to aluminum vapor deposition, a layer subjected to silica vapor deposition, or a layer subjected to aluminum oxide vapor deposition.

7. The deodorizing method according to claim 5, wherein at least one layer selected from the group consisting of an oriented nylon resin layer, a nylon resin layer, an oriented polyethylene terephthalate resin layer, and a polyethylene terephthalate resin layer is coated on its surface with an ethylene vinyl alcohol copolymer resin, a polyvinyl alcohol resin, or a polyvinylidene chloride resin.

8. The deodorizing method according to claim 1, wherein the deodorizing layer of the multilayer deodorizing sheet used in the deodorizing sheet coating step is a layer formed by co-extruding a nylon resin and an ethylene vinyl alcohol copolymer resin, or a layer formed by co-extruding a nylon resin and a metaxylylene adipamide resin.

9. The deodorizing method according to claim 1, wherein the heat-seal layer of the multi-layer deodorizing sheet used in the deodorizing sheet coating step is a linear low-density polyethylene resin layer, a low-density polyethylene resin layer, an ethylene vinyl acetate copolymer resin layer, an ethylene ethyl acrylate copolymer resin layer, an ethylene acrylic acid copolymer resin layer, an ethylene methyl methacrylate copolymer resin layer, an ethylene methacrylic acid copolymer resin layer, or an ionomer resin layer.

10. The deodorizing construction method according to claim 1, wherein the puncture strength of the multi-layer deodorizing sheet used in the deodorizing sheet coating step is 10 N or more.

Images