Deodorization method for room where deceased person has been left

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] The present invention relates to a deodorizing method for a room where a deceased person has been left unattended due to a solitary death or the like. [Background technology]

[0002] Lonely death is when a person dies alone without anyone to be present at their death. In recent years, with the trend toward nuclear families, the aging of the population, and the weakening of community ties, the number of lonely deaths has increased and become a social problem.

[0003] In a room where a deceased person has been left, the room becomes dirty and emits a strong odor due to the decay of the body, body fluids, excrement, etc. In such cases, it is necessary to clean the room and thoroughly deodorize it to restore it to its original state.

[0004] A known method for deodorizing a room where a deceased person has been left behind is a deodorizing method (Patent Document 1) that includes a filth cleanup operation to clean up filth selected from bodily fluids, feces, and urine, a dismemberment operation to dismember the areas where the filth has adhered, an ozone fumigation operation to spray ozone into the room after the dismemberment operation, and a coating operation to cover with paint any areas exposed by the dismemberment operation where filth remains (after the ozone fumigation operation). However, the method in Patent Document 1 has the drawback that the coating operation after the ozone fumigation operation is cumbersome and time-consuming, and because the paint used is essentially an oil-based primer, the working environment is poor due to the odor of the organic solvent in the paint, and the deodorizing effect of the room is not necessarily sufficient, and there is also the problem that the odor may reoccur in the room.

[0005] Another known method for deodorizing a room where a deceased person has been left behind, which provides a sufficiently high deodorizing effect, prevents odor reoccurrence after deodorization, and provides an excellent working environment during coating work, is a method (Patent Document 2) that includes a disinfectant solution spraying step in which a solution containing at least one disinfectant selected from stabilized chlorine dioxide, hypochlorous acid, and sodium hypochlorite is sprayed into the room; a waste cleaning step in which waste including at least one of body fluids, excrement, and skin flakes is cleaned up; a demolition step in which areas where waste has adhered or penetrated are dismantled; an ozone fumigation step in which ozone is sprayed into the room after the demolition step; and a coating step in which an aqueous epoxy resin paint is applied to and coated on areas exposed in the demolition step after the ozone fumigation step. However, the method of Patent Document 2 also has the drawback that the coating step with aqueous epoxy resin paint after the ozone fumigation step is cumbersome and time-consuming. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6889954 [Patent Document 2] Japanese Patent Publication No. 2023-145305 Summary of the Invention [Problem to be solved by the invention]

[0007] The object of the present invention is to provide a deodorizing method for a room where a deceased person has been left behind, which eliminates the drawbacks of the above-mentioned prior art, is easy to install, has no problems with the working environment, has a sufficient deodorizing effect, and does not cause reoccurrence of odor. [Means for solving the problem]

[0008] As a result of intensive research conducted by the inventors to achieve the above-mentioned object, they discovered that by applying a specific deodorizing sheet under heat and pressure to the areas where odorous substances remain after the process of cleaning up the waste, dismantling, and ozone fumigation of the room where the deceased was left, the complicated and time-consuming paint coating process becomes unnecessary, the application process is very simple, the application time can be significantly reduced, there are no problems with the working environment, the deodorizing effect in the room is sufficient, and the odor does not reoccur.

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

[0010] 1. Deodorizing method for a room where a deceased person was left, including the following steps: a disinfectant solution spraying step of spraying a solution containing at least one disinfectant selected from the group consisting of stabilized chlorine dioxide, hypochlorous acid, sodium hypochlorite, and hydrogen peroxide into the room; Cleaning up waste containing one or more of body fluids, excrement, and skin debris; Demolition process to dismantle areas where filth has adhered or penetrated; Ozone fumigation process in which ozone is sprayed into the room after the demolition process; After the ozone fumigation process, an odor-preventing sheet coating process is performed in which a multilayer odor-preventing sheet having an odor-preventing layer and a heat-sealing layer is heat-pressed onto the areas where odorous substances remain.

[0011] 2. The deodorizing method according to item 1, further comprising the step of spraying ozone into the room to suppress odors before the filth cleaning step.

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

[0013] 4. The deodorizing method according to item 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.

[0014] 5. The deodorizing construction method described in item 1 above, wherein the deodorizing layer of the multilayer deodorizing sheet used in the deodorizing sheet covering process is a layer consisting of one or two layers 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.

[0015] 6. 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 a layer whose surface has been subjected to aluminum vapor deposition, a layer whose silica vapor deposition has been applied, or a layer whose aluminum oxide vapor deposition has been applied.

[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 a layer whose surface is coated with an ethylene-vinyl alcohol copolymer resin, a polyvinyl alcohol resin, or a polyvinylidene chloride resin.

[0017] 8. The deodorizing construction method described in item 1 above, wherein the deodorizing layer of the multilayer deodorizing sheet used in the deodorizing sheet covering step is a layer formed by co-extrusion of nylon resin and ethylene-vinyl alcohol copolymer resin, or a layer formed by co-extrusion of nylon resin and metaxylylene adipamide resin.

[0018] 9. The deodorizing construction method described in item 1 above, wherein the heat seal layer of the multilayer deodorizing sheet used in the deodorizing sheet covering process 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.

[0019] 10. The deodorizing construction method according to item 1, wherein the multi-layer deodorizing sheet used in the deodorizing sheet covering step has a puncture strength of 10 N or more. [Effects of the Invention]

[0020] The deodorizing method of the present invention for a room where a deceased person has been left behind has the following remarkable effects.

[0021] (1) After the process of cleaning up the filth in the room where the deceased was left, the demolition process, and the ozone fumigation process, a special odor-preventing sheet is heat-pressed onto the areas where odorous substances remain. This is a very simple process that effectively blocks the odor caused by odorous substances remaining in areas where filth has adhered or penetrated, and it has an excellent deodorizing effect, and furthermore, it prevents the odor from re-occurring.

[0022] (2) In addition, the complicated and time-consuming paint coating process is not required, the application work is very simple, the application time can be significantly reduced, and furthermore, the poor working environment that occurs when oil-based paints are used is eliminated.

[0023] (3) Therefore, the deodorizing method of the present invention is easy to use and has excellent deodorizing effects, and can restore a room to its original state with significantly reduced labor and cost, and in a short time. Furthermore, by restoring a room to its original state in this way, the utility value and asset value of the room can be favorably maintained. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a cross-sectional view of an example of a multilayer deodorizing sheet used in the deodorizing construction method of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of another example of a multilayer deodorizing sheet used in the deodorizing construction method of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] Deodorizing method for a room where a deceased person was left The deodorizing method of the present invention for a room where a deceased person has been left behind requires the steps of spraying disinfectant, cleaning up filth, dismantling, ozone fumigation, and covering with an odor-proof sheet to be carried out in that order.Furthermore, if necessary, an odor suppression step before the filth cleaning step and a deodorizer spraying step before the ozone fumigation step can be carried out, thereby achieving an excellent deodorizing effect that is easy to work with, is sufficiently strong, and does not result in the recurrence of odors.

[0026] The room where the deceased was left The type of room where the deceased person was left, which is the target of deodorization by the deodorizing method of the present invention, is not particularly limited, and includes various rooms such as homes, apartment buildings, stores, inns, restaurants, factories, warehouses, garages, etc. The material of the room to be deodorized is also not particularly limited, and it may be made of wood, concrete, etc. The size of the room to be deodorized is also not particularly limited, but the lower limit of the area of ​​the room is, for example, 10 m 2 More than that, and 20m 2 More than that, and another 50m 2 For example, the upper limit of the area of ​​a room is 200m 2 Below, 120m 2 Below that, another 80m 2 The following rooms can be deodorized:

[0027] There is also no particular limitation on the length of time the deceased has been left in the room. For example, the room to be deodorized may be one in which the deceased has been left for several days to one week or more, or even two weeks or more, or even one month or more since the deceased was left in the room.

[0028] The deodorizing method of the present invention will be explained below in the order of the steps: disinfectant spraying process, odor suppression process, filth cleaning process, demolition process, deodorizer spraying or application process, ozone fumigation process, and deodorizing sheet covering process.

[0029] (1) Disinfectant spraying process In the method of the present invention, a disinfectant spraying step is carried out before the waste cleaning step in order to prevent infection. The disinfectant spraying step is a step of spraying a disinfectant into the room where the deceased person was left.

[0030] The disinfectant solution is preferably a liquid containing a disinfectant selected from the group consisting of stabilized chlorine dioxide, hypochlorous acid, sodium hypochlorite, and hydrogen peroxide, either singly or in combination. Spraying a liquid containing at least one disinfectant selected from stabilized chlorine dioxide, hypochlorous acid, sodium hypochlorite, and hydrogen peroxide can effectively remove bacteria, viruses, and the like from the room, thereby preventing infectious diseases and contributing to deodorizing the room.

[0031] Among disinfectants, it is particularly preferable to use a liquid agent containing sodium hypochlorite, as it is highly effective in removing bacteria, viruses, etc. from the room. An example of a liquid agent containing sodium hypochlorite as the 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 more, more preferably 700 PPM or more, and even more preferably 900 PPM or more.By spraying a liquid agent containing sodium hypochlorite at a concentration above this lower limit, fungi, viruses, etc. in the room can be more effectively removed, so that infectious diseases can be prevented and the room can be deodorized.

[0033] Furthermore, it is preferable to use a solution containing hydrogen peroxide, particularly a so-called accelerated hydrogen peroxide solution prepared by dissolving hydrogen peroxide, a surfactant, a solvent, an organic acid, phosphoric acid, etc. in water, as a disinfectant, since it can rapidly remove bacteria, viruses, etc. in a room. Accelerated hydrogen peroxide can remove bacteria and viruses by spraying or applying an undiluted 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 "Oxylite" (manufactured by C.B.S. Co., Ltd.).

[0034] (2) Odor suppression process In the method of the present invention, (1) after the disinfection step, if necessary, a step of spraying ozone into the room to suppress odors can be carried out. 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 filth cleaning step, viruses are inactivated and the odor is temporarily suppressed, allowing workers to clean efficiently and also serving as a measure against neighbors.

[0035] This odor suppression step is preferably performed by wiping off the stabilized chlorine dioxide, hypochlorous acid, sodium hypochlorite, or hydrogen peroxide used in the disinfection step before spraying ozone, because if a large amount of these highly oxidizing compounds remain, the burden on the ozone fumigation device will be large and may cause malfunction.This odor suppression step is preferably performed by exposing the material to ozone at an ozone concentration of about 1 to 20 ppm for about 30 to 90 minutes.

[0036] For ozone fumigation, a known ozone fumigation device can be used. Preferred examples of the ozone fumigation device include ActivO-J (manufactured by Kai Corporation), Super Activo (manufactured by Kai Corporation), and Panther-J (plasma ozone deodorizing device, manufactured by Ecozone Co., Ltd.).

[0037] (3) Dirt cleaning process The waste cleaning process is a process for cleaning up waste including one or more of bodily fluids such as blood, lymph, saliva, etc.; excrement such as feces and urine; skin fragments, etc. By performing the waste cleaning process and removing the waste, it becomes possible to reliably deodorize the room where the deceased was left in the subsequent ozone fumigation process.

[0038] The waste cleaning process involves removing body fluids, excrement, skin particles, etc. adhering to floors, walls, fixtures, doors, windows, window frames, etc. using tongs or spatulas, followed by spraying detergent and scrubbing with a brush, etc. As the detergent, an alkaline detergent is preferably used because of its high cleaning effect, and a strong alkaline detergent is more preferable. However, if there is a urine odor, it is preferable to also use an acidic detergent for cleaning, and if the house is a garbage dump and there are multiple odor-causing substances, it is preferable to also use a neutral or acidic detergent for cleaning after removing the garbage.

[0039] Alkaline detergents preferably have a pH in the range of about 8 to 11, and examples thereof include solutions containing sodium sesquicarbonate, baking soda, etc. Strong alkaline detergents preferably have a pH of about 12 or higher, and examples thereof include solutions containing caustic soda, etc. Acidic detergents preferably have a pH in the range of about 1.5 to 4, and examples thereof include solutions containing an acidic substance such as citric acid or a surfactant.

[0040] (4) Demolition process The demolition process involves dismantling areas where filth has adhered or permeated the body. In many cases, the odor cannot be completely removed by the filth cleaning process, but by dismantling the surface areas of the room where the deceased was left, the odor can be completely removed from the dismantled areas.

[0041] Specifically, in the demolition process, wallpaper, baseboards, cushioned flooring, etc. are removed, and floorboards, flooring, tatami mats, etc. are removed to expose the pillars, beams, foundations, framework, etc. of the room. These exposed areas are preferably cleaned in the same manner as in the filth cleaning process. This demolition process makes it possible to more reliably deodorize the room where the deceased was left in the subsequent ozone fumigation process.

[0042] (5) Deodorant spraying or application process In the method of the present invention, it is preferable to carry out a deodorizing spraying or application step after the (4) dismantling step. The deodorizing spraying or application step involves spraying or applying a deodorizing agent containing at least one enzyme selected from protease, lipase, amylase, and cellulase to the floor, walls, windows, ceiling, etc. of the room, or to areas exposed during the dismantling step, before the subsequent ozone fumigation. It is preferable that the deodorizing agent further contains an alkaline detergent such as sodium sesquicarbonate or a surfactant. By spraying or applying the enzyme-containing deodorizing agent and then appropriately washing the area, proteins, fats, starches, and fibers can be decomposed, resulting in efficient deodorization. Furthermore, combining the deodorizing spraying or application with the subsequent ozone fumigation can produce a synergistic deodorizing effect.

[0043] The enzymes contained in the deodorant do not necessarily have to be all four types of enzymes, namely protease, lipase, amylase and cellulase, and may be any one type or a combination of two or more types depending on the situation.

[0044] The deodorizer is preferably a liquid agent, which allows the deodorizer to be efficiently sprayed or applied to floors, walls, and the like.

[0045] Examples of deodorants containing the enzyme include Gran Bio Air (manufactured by Kai Corporation), Gran Bio Pro (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 carried out after the (4) dismantling step, or after the (4) dismantling step and the (5) deodorant spraying or application step. The ozone fumigation step is a step of spraying ozone into the room using an ozone fumigation device. By spraying ozone, the room is exposed to ozone. By carrying out the ozone fumigation step at this stage, odors can be efficiently decomposed and removed after the filth has been cleaned and removed.

[0047] In this ozone fumigation step, it is preferable to spray ozone at a slightly higher temperature when the floors, walls, etc. are wet and humid due to cleaning after the dismantling step or the spraying or application of a deodorizer, in order to improve deodorizing efficiency. Specifically, the humidity is preferably about 60 to 100%, more preferably about 70 to 100%. The temperature is preferably about 20 to 30°C, more preferably about 24 to 28°C. If temperature or humidity needs to be adjusted, an air conditioner, heater, humidifier, etc. can be used as appropriate.

[0048] The ozone fumigation step at this stage is preferably carried out by exposing the material to ozone at an ozone concentration of about 1 to 30 ppm. Furthermore, to prevent the ozone concentration from rising too high and the odor from leaking to nearby areas, it is preferable to spray ozone intermittently. For example, ozone spraying can be performed for about 0.5 to 3 hours and then stopped for about 1 to 4 hours, and these cycles can be repeated as necessary. The ozone exposure time is usually preferably about 1 to 24 hours.

[0049] In the ozone fumigation step, the various ozone fumigation devices described above can be used.

[0050] (7) Deodorizing sheet covering process (6) After the ozone fumigation step, (5) is a step of covering areas exposed in the demolition step where odorous substances remain by thermocompression bonding a multilayer deodorizing sheet having an odor-preventing layer and a heat-sealing layer. By thermocompression bonding the multilayer deodorizing sheet to areas exposed in the demolition step 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 where odorous substances remain or are likely to remain due to penetration of dirt, etc. In addition to the areas exposed in the demolition, it is also preferable to cover areas (floors, walls, etc.) where dirt has adhered and been cleaned but not dismantled with a multilayer deodorizing sheet by thermocompression bonding to block remaining odors.

[0051] Here, the materials of the building materials such as pillars, beams, foundations, framework, floors, and walls of a room, which are the surfaces to which the multilayer deodorizing sheet is heat-pressed, are not particularly limited, and examples include concrete, wood, gypsum board, plastic, etc.

[0052] In the method of the present invention, it is important to apply heat and pressure to a multilayer deodorizing sheet having an odor-preventing layer and a heat-sealing layer to areas where odorous substances remain after the ozone fumigation step. That is, by performing the odor-preventing sheet coating step, odors are reliably blocked, a sufficiently high deodorizing effect is obtained, and an excellent deodorizing effect is achieved in that odors do not reoccur after deodorizing work. Furthermore, because no paint coating work is performed, there is no odor from organic solvents, making the working environment favorable. Since it is only necessary to apply the odor-preventing sheet to specific areas by heat and pressure, work time can be significantly reduced, and the work is simple and easy to perform.

[0053] The deodorizing sheet used in the method of the present invention is a multilayer deodorizing sheet having a film configuration with at least two layers: an deodorizing layer that suppresses odors by using a material with high fragrance retention and odor-resistant properties so that odors that have permeated into the adherend, such as a building material, are not released, and a heat-sealable layer that can be adhered to the adherend by heating and pressing, even if the surface of the building material, etc. is uneven. Such deodorizing sheets can be produced by known methods, such as dry lamination, which involves lamination using an adhesive, extrusion lamination, which involves lamination using a melted resin, or a processing method that combines these.

[0054] Figure 1 shows a cross-sectional view of an example of a multilayer deodorizing sheet used in the deodorizing application method of the present invention, with 1 indicating the deodorizing sheet, 2 indicating the deodorizing layer, and 3 indicating the heat-sealing layer. Figure 2 shows a cross-sectional view of another example of a multilayer deodorizing sheet used in the deodorizing application method of the present invention, with the deodorizing layer consisting of two layers: 1 indicating the deodorizing sheet, 2a indicating deodorizing layer I, 2b indicating deodorizing layer II, 2 indicating the deodorizing layer consisting of 2a and 2b, and 3 indicating the heat-sealing layer. In the multilayer deodorizing sheet used in the method of the present invention, the thickness of the deodorizing layer is typically about 10 to 100 μm, and the thickness of the heat-sealing layer is typically preferably about 20 to 150 μm.

[0055] The odor-preventing layer of the multilayer odor-preventing sheet used in the present invention also functions as a base layer, and is made of a resin layer with high odor-preventing properties and odor-resistant properties. For example, polyethylene terephthalate resin, nylon resin (polyamide resin), etc., whose molecular structure makes the resin component itself odor-resistant, can be used. The aroma-preventing properties of these resins can be enhanced by stretching them. Furthermore, the aroma-preventing properties (deodorizing 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, the aroma retention (deodorizing effect) can be further enhanced by coating the surface of a layer such as an oriented nylon resin layer, an oriented polyethylene terephthalate resin layer, a nylon resin layer, or a polyethylene terephthalate resin layer with a resin having high aroma retention properties such as an ethylene vinyl alcohol copolymer resin, a polyvinyl alcohol resin, or a polyvinylidene chloride resin.

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

[0058] Specific preferred examples of the odor-proof layer include 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. The film may also be a laminated resin layer consisting of two or more resin layers selected from these resin layers. Examples of laminated resin layers consisting of two or more resin layers include a two-layer film consisting of a stretched polyethylene terephthalate resin layer and a stretched nylon resin layer, a two-layer film consisting of a silica or aluminum oxide vapor-deposited stretched polyethylene terephthalate resin layer and a stretched nylon resin layer, a three-layer film consisting of a polyvinylidene chloride-coated polyethylene terephthalate resin layer (two layers) and a stretched nylon resin layer, a co-extruded three-layer film in which an ethylene-vinyl alcohol copolymer resin is sandwiched between nylon resins, and a co-extruded three-layer film in which a metaxylylene adipamide resin is sandwiched between nylon resins.

[0059] The heat-seal layer of the multilayer deodorizing sheet used in the present invention is designed to conform to the uneven surface of the adherend, such as a building material, by melting the surface of the heat-seal layer where the deodorizing sheet contacts the adherend during heat-pressure bonding, applying pressure so that the heat-softened resin flows into the gaps in the uneven surface of the adherend, and as the resin temperature drops, it hardens and adheres to the adherend surface. Therefore, it is necessary to select a resin that has 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, and ionomer resin layers, among other ethylene copolymer resin layers. The ionomer resins are prepared by reacting metal ions, such as sodium ions, with ethylene-methacrylic acid copolymer resins to partially crosslink them via ionic bonds.

[0060] Furthermore, since the adherend surface is uneven during the heat-pressure bonding process, it is desirable for the multilayer deodorizing sheet to have high puncture strength so that the film does not tear during pressure bonding. Specifically, the puncture strength of the multilayer deodorizing sheet used in the deodorizing sheet covering process is usually preferably about 10 N or more.

[0061] Furthermore, the multilayer deodorizing sheet used in the deodorizing sheet covering process exhibits excellent adhesion to the surface of the adherend because the resin of the heat-seal layer flows into the gaps in the uneven surface of the adherend and hardens to adhere, so it usually does not peel off after deodorizing treatment, causing odors to re-emit. The adhesion strength of the multilayer deodorizing sheet used in the deodorizing sheet covering process is not particularly limited and will vary depending on the material and surface condition of the adherend, but for example, when the adherend is made of wood and is flat, it is usually preferable that it be about 3 N / 15 mm or more.

[0062] When a multilayer deodorizing sheet is heat-pressed to an adherend, it is preferable to clean the adherend surface to enhance 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 adherend surface and then polish the surface. Furthermore, if the adherend is concrete, it is preferable to heat the adherend surface using a heat gun. Next, the deodorizing sheet is placed on the adherend surface so that it is in close contact with the adherend surface and prevents air from entering, and then heat-pressed using an iron or the like at a temperature of typically about 140°C to 240°C so that the heat-seal layer melts and adheres to the adherend surface.

[0063] Thus, by carrying out the deodorizing method of the present invention for a room where a deceased person has been left, it is possible to obtain an excellent deodorizing effect that is simple, quick, and easy to work with, and that is sufficiently strong and does not cause the odor to recur. [Example]

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

[0065] The deodorizing application environment and the multilayer deodorizing sheets used in each example are as follows:

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

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

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

[0069] Example 1 Case 1 The room to be deodorized is 15m in area. 2 The scene of a man's solitary death was a one-room apartment in the area, and the deceased had been left there for three weeks after his death.

[0070] Condition at the start of deodorization work The deceased was found collapsed in the center of the room. Body fluids had flowed through the cushioned flooring (CF) and into the concrete foundation, causing a strong odor. Before the deodorizing treatment, the odor was 4.2 ppm hydrogen sulfide and 1.9 ppm ammonia.

[0071] (1) Disinfectant spraying process The disinfectant used was Oxylite (C.B.S. Co., Ltd.) undiluted solution (0.5% accelerated hydrogen peroxide). The solution was sprayed over the entire room, including the ceiling, walls, and floor, using a pressurized electric sprayer over an area of ​​10 m. 2 The spray was applied at a rate of about 1 liter per area and left for 10 minutes to disinfect.

[0072] (2) Odor suppression process After thoroughly wiping off the oxylite sprayed in the disinfectant spraying 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 odor. The ozone concentration was 4.5 ppm.

[0073] (3) Dirt cleaning process The cushioned flooring that had been stained with body fluids, excrement, skin particles, and other filth was removed, and a strong alkaline detergent (caustic soda solution) with a pH of 13 or higher was sprayed onto the concrete foundation that had been stained and soaked with body fluids, and then the area was cleaned using a brush, etc. In addition, baseboards, fixtures, and equipment (kitchen cupboards, etc.) that had smells on them were also cleaned with alkaline detergent (sodium sesquicarbonate solution) because they had smells on them.

[0074] (4) Demolition process The surface of the room was dismantled, and in order to more thoroughly deodorize, the wallpaper, baseboards, cushioned flooring, and (part of) plasterboard were removed, and the floorboards and flooring were also removed. The floorboards under the cushioned flooring were also dismantled. The exposed concrete foundation and the body fluids that had flowed onto the walls were cleaned and removed.

[0075] (5) Deodorant spraying or application process A deodorizer ("Sesquiplus" manufactured by Sekken Hyakka Co., Ltd.), a sodium sesquicarbonate solution containing four enzymes - protease, lipase, amylase, and cellulase - was sprayed onto the floor, walls, windows, ceiling, etc. of the room, and the next step was started 10 minutes later.

[0076] (6) Ozone fumigation process After spraying the deodorant, the floor, wall, etc. were left damp, and the air conditioner was turned on and a humidifier was installed to maintain the temperature at 24-27°C and the humidity at 75% or higher. An ozone fumigation device, Panther-J (manufactured by Kai Corporation), was then used to spray 7500 mg / hr of ozone for approximately 1 hour followed by a 2-hour stop cycle, repeating this cycle twice to maintain the ozone concentration at 7-15 ppm.

[0077] (7) Deodorizing sheet covering process The cushioned flooring was removed to expose the concrete foundation where body fluids had adhered and penetrated. To improve the adhesion of the deodorizing sheet, a heat gun (temperature 300°C) was applied to the concrete surface for about 3 minutes to warm it up. Next, a section 80cm long and 40cm wide (0.32m) was applied to the concrete surface so that it would fully cover the area where the body fluids had adhered. 2 The heat seal layer side of one sheet of the above two-layer deodorizing sheet A (80 cm x 40 cm) was placed tightly on the sheet to prevent air from getting in, and the sheet was heated and pressed with an iron (temperature 220°C) for about 3 minutes. This deodorizing sheet coverage completely prevented odors from rising.

[0078] Odor status after deodorization work was completed After the deodorization treatment, the odors were 0 ppm for hydrogen sulfide and 0 ppm for ammonia. In addition, there was no odor from the deceased's bodily fluids.

[0079] Odor status one month after deodorization work was completed One month after the deodorizing treatment, the odor levels were 0 ppm for hydrogen sulfide and 0 ppm for ammonia. In addition, the odor of the deceased's bodily fluids was completely undetectable.

[0080] Example 2 Case 2 The deodorizing treatment target was a 6-tatami Japanese-style room on the second floor of a 2-story house with a 3DK layout. The deceased was the scene of a lonely death of a man, and had been left there for a month after his death. The rooms to be deodorized were the corridor on the second floor and the 6-tatami Japanese-style room, with an area of ​​35m. 2 It was.

[0081] Condition at the start of deodorization work The victim was found dead on a 6-tatami mat in a Japanese-style room on the second floor, and bodily fluids had spilled over the equivalent of three tatami mats. The bodily fluids had seeped through the tatami mats and into the plywood base, creating a strong odor. Bodily fluids had also spilled over the threshold, causing a strong odor to spread throughout the house. Before the deodorizing treatment, the odor levels were 5.8 ppm for hydrogen sulfide and 3.8 ppm for ammonia.

[0082] (1) Disinfectant spraying process The disinfectant used was "Haiter" (Kao Corporation) diluted with water to create a solution containing 1000 ppm of sodium hypochlorite. This solution was sprayed over the entire room, including the ceiling, walls, and floor, using a pressurized electric sprayer over an area of ​​35 m. 2 Disinfection was carried out by spraying approximately 1.8 liters per area.

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

[0084] (3) Dirt 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 vinyl) and tightly sealed with masking tape before being removed. After the tatami mats were removed, the thresholds and plywood panels underneath the tatami mats were washed 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 washed with an acidic detergent (aqueous solution containing citric acid and a surfactant). The pillars, windows, window frames, etc. of the room were also washed with an alkaline detergent (aqueous solution of sodium sesquicarbonate).

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

[0086] (5) Deodorant spraying or application process A deodorizer ("Sesquiplus" manufactured by Sekken Hyakka Co., Ltd.), a sodium sesquicarbonate solution containing four enzymes - protease, lipase, amylase, and cellulase - was sprayed onto the floor, walls, windows, ceiling, etc. of the room, and the next step was started 10 minutes later.

[0087] (6) Ozone fumigation process After spraying the deodorizer, the floors, walls, etc. were damp, and since there was no air conditioning, an electric heater and humidifier were installed to maintain the temperature at 24-27°C and the humidity at 70% or higher. 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 cycle, which was repeated twice to maintain the ozone concentration at 8-20 ppm, exposing the room to ozone and carrying out ozone fumigation.

[0088] (7) Deodorizing sheet covering process After removing the plywood, the concrete foundation was exposed, and to improve the adhesion of the deodorizing sheet, a heat gun (temperature 300°C) was applied to the concrete surface for about 3 minutes to warm it up. Next, a 160cm long, 80cm wide area (1.28m) was placed on the concrete surface to fully cover the area where the body fluids had been adhering. 2 Four sheets of the above three-layer deodorizing sheet B (80cm x 40cm) were placed on the same sheet, with the heat seal layer surfaces of each sheet tightly pressed together to prevent air from getting in, and the sheets were heated and pressed together with an iron (temperature 220°C) for about 12 minutes (3 minutes per sheet) while being pressed all over. This deodorizing sheet coating completely prevented odors from rising.

[0089] Odor status after deodorization work was completed After the deodorization treatment, the odors were 0 ppm for hydrogen sulfide and 0 ppm for ammonia. In addition, there was no odor from the deceased's bodily fluids.

[0090] Odor status one month after deodorization work was completed One month after the deodorizing treatment, the odor levels were 0 ppm for hydrogen sulfide and 0 ppm for ammonia. In addition, the odor of the deceased's bodily fluids was completely undetectable. [Industrial Applicability]

[0091] The deodorizing method of the present invention is suitable for deodorizing a room where the deceased has been left behind, because the work is simple and takes a short time, there are no problems with the working environment, the deodorizing effect of the room is excellent, and there is no re-occurrence of odor after the deodorizing work and the room can be suitably restored to its original state.

Claims

1. Deodorizing method for a room where a deceased person was left, including the following steps: a disinfectant solution spraying step of spraying a solution 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 soiling cleaning process for cleaning soil containing one or more of body fluids, excrement, and skin particles; A dismantling process to dismantle areas where filth has adhered or penetrated; Ozone fumigation process in which ozone is sprayed into the room after the demolition process; After the ozone fumigation process, an odor-preventing sheet coating process is performed in which a multilayer odor-preventing sheet having an odor-preventing layer and a heat-sealing layer is heat-pressed onto the areas where odorous substances remain.

2. 2. The deodorizing method according to claim 1, further comprising the step of spraying ozone into the room to suppress odors before the step of cleaning the filth.

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

4. 2. 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. 2. The deodorizing construction method according to claim 1, wherein the deodorizing layer of the multilayer deodorizing sheet used in the deodorizing sheet covering process is a layer consisting of one or two layers 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.

6. 6. The deodorizing construction 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 has been subjected to aluminum vapor deposition, silica vapor deposition, or aluminum oxide vapor deposition.

7. 6. The deodorizing construction 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 coated with an ethylene-vinyl alcohol copolymer resin, a polyvinyl alcohol resin, or a polyvinylidene chloride resin.

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

9. 2. The deodorizing construction method according to claim 1, wherein the heat seal layer of the multilayer deodorizing sheet used in the deodorizing sheet coating process 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. 2. The deodorizing method according to claim 1, wherein the multilayer deodorizing sheet used in the deodorizing sheet covering step has a puncture strength of 10 N or more.

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