Deodorizing methods for rooms with animal odors

Abstract

To provide a method for deodorizing a room having animal odor, enabling achievement of a sufficiently high deodorizing effect without subsequent re-generation of odor, while also reducing working time required for the deodorization treatment.SOLUTION: A method for deodorizing a room having animal odor, comprising the following steps: (1) a waste removal step of removing waste that includes at least one of bodily fluids, feces, and urine; (2) a step of spraying an alkaline detergent and washing; (3) an ozone fumigation step of spraying ozone into the room after step (2); (4) a step of spraying a weakly acidic detergent and washing; (5) an ozone fumigation step of spraying ozone into the room after step (4); and (6) an odor-preventive sheet covering step of heat-bonding a multilayer odor-preventive sheet having an odor-preventive layer and a heat-seal layer to locations where odor substances remain after the ozone fumigation step (5).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a deodorization construction method for a room with an animal odor.

Background Art

[0002] In recent years, as a member of the family, the number of people living indoors with pets such as dogs and cats has been increasing. However, when the pets breed too much and cannot be raised, or when the owner cannot raise the pets due to personal reasons, the situation where the pets that have been raised are abandoned is increasing. In the room where the pet has been abandoned, the room is soiled by the decay of the carcass, body fluids, excrement, etc., and a strong animal odor is generated. Further, when the owner who has been raising the pet indoors moves due to relocation or the like, in the room where the pet has been raised, the room is soiled by the pet's body fluids, excrement, etc., and a strong animal odor is generated.

[0003] As described above, in the room where the pet has been raised indoors, the room is soiled by the pet's body fluids, excrement, etc., and a strong animal odor is generated. In such a case, it is necessary to clean the room, further deodorize it sufficiently, and restore it to its original state.

[0004] As a method for deodorizing a room with an animal odor, a deodorization method (Patent Document 1) is known in which after performing a dirt cleaning operation for a room where an animal has been abandoned, a liquid spraying operation of spraying a weakly alkaline liquid agent and / or a weakly acidic liquid agent into the room, and an ozone fumigation operation, the liquid spraying operation and the ozone fumigation operation are repeated.

[0005] However, the method of Patent Document 1 has a problem that the deodorizing effect is insufficient, and in order to obtain a sufficient deodorizing effect, it is necessary to repeat the liquid spraying operation and the ozone fumigation operation until the odor in the room is no longer felt, so the working time becomes long (see paragraphs

[0122] ,

[0133] , and [FIG. 2] of Patent Document 1). Further, after the deodorization construction, in many cases, there is a big problem that the odor is regenerated within several days to several weeks.

Prior Art Documents

[0006] [Patent Document 1] Patent No. 7122027 [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 rooms with animal odors that solves the problems of the conventional technology described above, provides a sufficiently high deodorizing effect, prevents the re-generation of odors, and further shortens the working time during deodorization work. [Means for solving the problem]

[0008] The inventors diligently conducted research to achieve the above objectives and discovered that by performing a dirt removal process, an alkaline detergent spraying and washing process, an ozone fumigation process, a weak acid detergent spraying and washing process, and an ozone fumigation process, and then heating and pressing a specific deodorizing sheet onto the areas where odor-causing substances remain, odors originating from the remaining odor-causing substances can be effectively blocked, preventing odors from re-emerging after deodorization. Furthermore, since it is not necessary to repeat the alkaline detergent spraying and washing process, the ozone fumigation process, the weak acid detergent spraying and washing process, and the ozone fumigation process, the deodorization process time can be significantly reduced. As a result of further investigation, the inventors have completed the present invention.

[0009] The present invention provides a method for deodorizing rooms that have animal odors, as described below.

[0010] 1. A method for deodorizing a room with animal odors, including the following steps: (1) A waste removal process that removes waste containing at least one of bodily fluids, feces, and urine; (2) A step of washing by spraying with an alkaline detergent; (3) Ozone fumigation process, in which ozone is sprayed into the room after process (2); (4) A step of washing by spraying with a weakly acidic detergent; (5) Ozone fumigation process, in which ozone is sprayed into the room after process (4); (6) An odor-proof sheet coating process in which, after the ozone fumigation process (5), a multi-layer odor-proof sheet having an odor-proof layer and a heat-seal layer is heat-pressed onto the areas where odor-causing substances remain.

[0011] 2. The deodorizing construction method described in item 1 above, wherein a deodorizer is sprayed during the ozone fumigation process (3).

[0012] 3. The deodorizing construction method described in item 1 above, wherein a deodorizer is sprayed during the ozone fumigation process (5).

[0013] 4. The deodorization method described in item 1 above, wherein the ozone fumigation process (3) and (5) are carried out by exposing the room to ozone at a temperature of 18-30°C, a humidity of 60-100%, and an ozone concentration of 1-30 ppm.

[0014] 5. Furthermore, the deodorization method described in item 1 above, wherein after the ozone fumigation process (5), a demolition process is carried out to dismantle the areas where the waste has permeated.

[0015] 6. 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 at least one layer 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.

[0016] 7. The deodorizing construction method according to item 6 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.

[0017] 8. The deodorizing construction method according to item 6 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.

[0018] 9. The deodorant layer of the multilayer deodorant sheet used in the deodorant sheet coating step is a layer formed by coextruding nylon resin and ethylene vinyl alcohol copolymer resin, or a layer formed by coextruding nylon resin and metaxylylene adipamide resin. The deodorization construction method according to item 1 above.

[0019] 10. The heat-sealing layer of the multilayer deodorant sheet used in the deodorant 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. The deodorization construction method according to item 1 above.

[0020] 11. The puncture strength of the multilayer deodorant sheet used in the deodorant sheet coating step is 10 N or more. The deodorization construction method according to item 1 above.

Effect of the Invention

[0021] According to the deodorization construction method of the room with animal odor of the present invention, the following remarkable effects are achieved.

[0022] (1) After performing the dirt removal step, the alkaline detergent spraying and cleaning step, the ozone fumigation step, the weakly acidic detergent spraying and cleaning step, and the ozone fumigation step, by a very simple construction operation of heat-pressing a specific deodorant sheet on the location where odor substances remain, a sufficiently high deodorization effect can be obtained that can effectively block the odor derived from the remaining odor substances, and moreover, the odor will not reoccur after the deodorization construction.

[0023] (2) Due to the excellent deodorization effect in (1) above, it is not necessary to repeat the alkaline detergent spraying and cleaning step, the ozone fumigation step, the weakly acidic detergent spraying and cleaning step, and the ozone fumigation step, so the deodorization construction time can be significantly shortened.

[0024] (3) Accordingly, the deodorizing construction method of the present invention allows for the effective elimination of animal odors in a short time with simple construction work, excellent deodorizing effect on the room, significantly reduced labor and cost, and facilitates the restoration of the room to its original condition. Thus, by being able to restore the room to its original condition, the usability and asset value of the room can be easily maintained. [Brief explanation of the drawing]

[0025] [Figure 1] This is a cross-sectional view of an example of a multi-layer odor-proof sheet used in the odor-eliminating 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]

[0026] Deodorizing methods for rooms with animal odors The present invention provides a method for deodorizing rooms with animal odors by sequentially performing the following steps: a dirt removal step, an alkaline detergent spraying and washing step, an ozone fumigation step, a weak acid detergent spraying and washing step, an ozone fumigation step, and an odor-proof sheet covering step.

[0027] A room with an animal smell The type of room that can be deodorized using the deodorizing 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, 20 m². 2 Furthermore, another 50m 2 The above rooms have an upper limit of area, for example, 300m². 2 Below, and even 200m 2 The following rooms can be targeted for deodorization.

[0028] Furthermore, the category of animals includes all animals kept as pets. While dogs and cats are typical examples, the category is not limited to these. There are no particular restrictions on the length of time the animals were kept or abandoned. Whether the animals were alive or dead is also irrelevant. The period of keeping is usually one year or longer, and it is not uncommon for it to be 10 years or more.

[0029] The deodorizing method of the present invention will be described below in the following order: dirt removal step, alkaline detergent spraying and washing step, ozone fumigation step, weak acid detergent spraying and washing step, ozone fumigation step, and deodorizing sheet covering step.

[0030] (1) Waste removal process The waste removal process involves removing bodily fluids such as animal saliva, blood, and lymph; excrement such as feces and urine; and waste containing one or more types of material, such as hair. By removing waste in the waste removal process, subsequent processes such as weakly alkaline liquid spraying and ozone fumigation can be used to reliably deodorize rooms containing animal odors.

[0031] In the waste removal process, bodily fluids, excrement, hair, etc., adhering to floors, walls, fixtures, doors, windows, window frames, etc., are removed using tongs, scrapers, spatulas, etc. Furthermore, it is desirable to remove all tatami mats, cushion flooring (CF), wallpaper, etc., that have urine or other waste adhering to or permeating them.

[0032] In the method of the present invention, a disinfectant spraying step can be performed before the waste removal step, if necessary. As the disinfectant, a liquid formulation containing a disinfectant selected from stabilized chlorine dioxide, hypochlorous acid, and sodium hypochlorite, either alone or as a mixture of two or more, can be used. By spraying the disinfectant, bacteria, viruses, etc. in the room can be effectively removed, thereby preventing infectious diseases and contributing to the deodorization of the room. Furthermore, using a liquid formulation containing sodium hypochlorite among the disinfectants is preferable because it has a high effect in removing bacteria, viruses, etc. in the room, and in this case, the concentration of sodium hypochlorite is preferably 500 PPM or higher.

[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] Furthermore, following the disinfectant spraying process described above, ozone fumigation can be performed as an odor suppression process if necessary. Ozone fumigation is carried out by spraying ozone into the room using an ozone fumigation device. By performing ozone fumigation, viruses are inactivated, odors are temporarily suppressed, allowing workers to efficiently carry out waste removal work, and also serving as a measure to deter neighbors. It is preferable to perform ozone fumigation after wiping with a disinfectant with strong oxidizing power. It is preferable to perform ozone fumigation by exposing the area to ozone at an ozone concentration of about 1 to 20 ppm for about 20 to 90 minutes.

[0035] In the present invention, known ozone fumigation devices can be used for ozone fumigation. Preferably, ActivO-J (manufactured by Kai Corporation), Super Activo (manufactured by Kai Corporation), Panther-J (plasma ozone deodorizer, manufactured by Ecozone Co., Ltd.), Ozone Cluster 1400 (ozone generator, manufactured by Earthwalker Trading Co., Ltd.) can be used as ozone fumigation devices.

[0036] (2) Alkaline detergent spraying and washing process The alkaline detergent spraying and cleaning process involves spraying an alkaline detergent into the room after the waste removal process. The alkaline detergent can be in liquid or powder form, and it is preferable to dilute or dissolve it in water before use. Preferably, the alkaline detergent has a pH in the range of 8 to 12. Examples include a weakly alkaline detergent solution containing one or more types of surfactants such as anionic surfactants, amphoteric surfactants, nonionic surfactants, sodium sesquicarbonate, and baking soda. This process can be carried out by spraying the weakly alkaline detergent and cleaning the room using a deck brush, sponge, etc. If the dirt is severe, a strong alkaline detergent, such as one containing sodium hydroxide with a pH of approximately 12 or higher, may be used in combination as needed. Furthermore, in areas of a room where a cat has been left unattended that have a strong odor, using a detergent containing chlorine bleach can effectively clean and deodorize the area.

[0037] Furthermore, when cleaning with alkaline detergent, using a steam cleaner to spray high-pressure steam can efficiently remove dirt. For example, a high-pressure steam device (manufactured by Kärcher) can be used as a steam cleaner.

[0038] (3) Ozone fumigation process In the method of the present invention, an ozone fumigation step is performed after (1) a dirt removal step and (2) an alkaline detergent spraying and washing step. The ozone fumigation step is a step in which ozone is sprayed into the room using an ozone fumigation device. By performing the ozone fumigation step after the dirt has been removed and the room has been cleaned, odor components can be efficiently decomposed and removed.

[0039] In the method of the present invention, it is preferable to spray a deodorant during the ozone fumigation step (3). This is because the spraying of the deodorant and the subsequent ozone fumigation can be combined to produce a synergistic effect in deodorization. Furthermore, it is preferable that the deodorant is a liquid. Being a liquid allows the deodorant to be efficiently sprayed or applied to floors, walls, etc.

[0040] It is preferable to spray a weakly alkaline solution, such as an aqueous solution of sodium sesquicarbonate or baking soda, on the floor, walls, windows, ceiling, and other parts of the room before subsequent ozone fumigation. This neutralizes the acidic components contained in feces and urine, effectively eliminating the odor.

[0041] Furthermore, as a deodorizer, a deodorizing liquid containing at least one enzyme selected from protease, lipase, amylase, and cellulase can be sprayed. By spraying a deodorizer containing these enzymes and then fumigating with ozone, proteins, fats, starches, and fibers can be broken down, enabling efficient deodorization. Examples of deodorizers containing the above enzymes include GranBioAir (manufactured by Kai Corporation), GranBioPro (manufactured by Kai Corporation), and SesquiPlus (manufactured by Sekken Hyakka Co., Ltd.).

[0042] 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 the alkaline detergent spraying cleaning process or the spraying of a deodorant, as this improves deodorizing efficiency. Specifically, a humidity of 60-100% is preferable, and 70-100% is more preferable. Also, a temperature of 18-30°C is preferable, and 20-28°C is more preferable. If temperature and humidity adjustment is necessary, air conditioners, circulators, heaters, humidifiers, etc. can be used as appropriate.

[0043] The ozone fumigation process at this stage is preferably carried out by exposing the material to ozone at an ozone concentration of approximately 1 to 30 ppm. The ozone exposure time is usually preferably about 0.5 to 4 hours. Various ozone fumigation devices described above can be used for the ozone fumigation process.

[0044] (4) Weakly acidic detergent spraying and washing process The weakly acidic detergent spraying cleaning step is a step of spraying a weakly acidic detergent into the room after the ozone fumigation step (3) to clean it. The weakly acidic detergent is preferably one with a pH in the range of 1.5 to 4, and examples include detergent solutions which are aqueous solutions containing acidic substances such as citric acid, or surfactants such as anionic surfactants, amphoteric surfactants, and nonionic surfactants. The weakly acidic detergent is preferably sprayed after the ozone fumigation step, after drying the room, spraying the weakly acidic detergent solution, and then cleaning with a steam cleaner or the like.

[0045] (5) Ozone fumigation process In the method of the present invention, (4) after the weakly acidic detergent spraying and washing step, an ozone fumigation step is further performed. The ozone fumigation step is a step in which ozone is sprayed into the room using an ozone fumigation device. By performing the ozone fumigation step at this stage, after dirt is removed and the area is cleaned, odors can be efficiently decomposed and removed.

[0046] In the method of the present invention, it is preferable to spray a deodorant during the ozone fumigation step (5). This is because the spraying of the deodorant and the subsequent ozone fumigation can be combined to produce a synergistic effect in deodorization. Furthermore, it is preferable that the deodorant is a liquid. Being a liquid allows the deodorant to be efficiently sprayed or applied to floors, walls, etc.

[0047] It is preferable to spray a weakly acidic solution containing an acidic substance such as citric acid on the floor, walls, windows, ceiling, and other parts of the room before subsequent ozone fumigation. This neutralizes the alkaline components contained in feces and urine, effectively eliminating the odor.

[0048] 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 the cleaning process with a weakly acidic detergent or the application of a deodorant, as this improves deodorizing efficiency. Specifically, a humidity of 60-100% is preferable, and 70-100% is more preferable. Also, a temperature of 18-30°C is preferable, and 20-28°C is more preferable. If temperature and humidity adjustment is necessary, air conditioners, circulators, heaters, humidifiers, etc. can be used as appropriate.

[0049] The ozone fumigation process at this stage is preferably carried out by exposing the material to ozone at an ozone concentration of approximately 1 to 30 ppm. The ozone exposure time is usually preferably about 0.5 to 4 hours. Various ozone fumigation devices described above can be used for the ozone fumigation process.

[0050] In the method of the present invention, after the (5) ozone fumigation step, a demolition step is performed as necessary. For example, if, due to the habits of animals, urine and feces are repeatedly excreted in the same place, such as in the corner of a room or inside a closet, and the excrement, especially urine, seeps through the gap between the wall and the floor and into the concrete foundation, or if a large amount has seeped into the same place, such as gypsum board or plywood in a closet, a demolition step is necessary. The demolition step is a process of dismantling the area where the urine or other waste has seeped in. Specifically, in the demolition step, after removing wallpaper, baseboards, cushion flooring, tatami mats, etc., floorboards, flooring, gypsum board, etc. are removed to expose the pillars, beams, foundation, framework, etc. of the room to the surface. Furthermore, it is preferable to repeat the (2) alkaline detergent spraying and cleaning step, (3) ozone fumigation step, (4) weak acid detergent spraying and cleaning step and (5) ozone fumigation step on this exposed area.

[0051] (6) Deodorizing sheet coating process (5) After the ozone fumigation process, or after the ozone fumigation process and the demolition process, a multi-layer deodorizing sheet having a deodorizing layer and a heat-sealing layer is heat-pressed onto the areas where odorous substances remain to cover them. By heat-pressing the multi-layer deodorizing sheet onto the areas where odorous substances remain, odors caused by odorous substances originating from waste can be reliably blocked. Areas where odorous substances remain include parts of the room's floor, walls, pillars, foundation, etc., where waste has penetrated, and areas where odorous substances are thought to remain.

[0052] Here, the material of the building material that is the surface to which the multi-layer deodorizing sheet is heat-pressed, such as the floor, walls, columns, beams, foundation, and framework of a room, is not particularly limited, and examples include concrete, wood, gypsum board, and plastic.

[0053] 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 which odors do not reappear after the deodorizing treatment. In addition, since it is only necessary to heat-press the deodorizing sheet onto specific areas, the work time can be greatly reduced, the work is simple and easy to do, and other advantages such as excellent workability can be obtained.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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).

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] Thus, the odor removal method for rooms with animal odors according to the present invention allows for odor removal that is simple to perform, quick to implement, and provides excellent odor removal effects. [Examples]

[0065] 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.

[0066] The monitoring of the deodorization work environment and the multi-layer deodorizing sheets used in each example are as follows.

[0067] Deodorization work environment and odor monitoring method for rooms with animal odors 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.

[0068] 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.

[0069] 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.

[0070] Example 1 Case Study 1 (Example of deodorization work performed in a room where a dog was kept) The room (house) to be treated for deodorization is 35 square meters in size and was previously home to an elderly woman who kept two toy poodles for six years. 2The tenant had moved out of the 1DK rental apartment because they could no longer live independently and moved into a care facility. After the dog was rescued, the son, who was the guarantor, requested odor removal. Due to the elderly resident, the dog had not been properly cared for, and the entire apartment was filled with feces and urine. The smell of feces and urine was extremely strong and had permeated the wallpaper and other surfaces, creating a terrible situation. The layout consisted of a Western-style room, kitchen, bathroom, and toilet.

[0071] Situation at the start of deodorization work The moment I opened the door to the room, I was hit with an intense smell of feces and urine. The Western-style room, kitchen, dressing room, and toilet all had cushioned flooring, but there were urine stains in every room, and in some places, feces were still there. Before the deodorization work, the odor levels in the Western-style room and kitchen were 1.5-2.5 ppm of hydrogen sulfide and 2.1-2.7 ppm of ammonia at every point, making it impossible to breathe normally.

[0072] (1) Disinfection process, odor suppression process, and waste removal process As a disinfectant, 1.5 liters of undiluted "Oxylight" (manufactured by Cif Co., Ltd.) (0.5% accelerated hydrogen peroxide) was sprayed mainly on the floor of the room, left for 5 minutes, and then wiped off. After that, to break down the odor and make the work easier, an ozone fumigation device Panther-J (manufactured by Kai Corporation) was used to spray 7500 mg / hr of ozone for about 60 minutes to suppress the odor. The ozone concentration was 4-6 ppm.

[0073] Next, using tongs and scrapers, we removed the bodily fluids, excrement, hair, and other contaminants that had adhered to the floor, walls, etc. Then, we peeled off and removed all of the cushion flooring that had absorbed urine, completing the waste removal process.

[0074] (2) Alkaline detergent spraying and washing process An alkaline detergent solution was sprayed onto the floor (the base beneath the cushion flooring was plywood), baseboards, walls, etc., and then a deck brush or sponge was used to clean off any attached dirt or absorbed urine. In areas with a strong odor, the detergent solution was sprayed again, followed by cleaning with a steam cleaner. The alkaline detergent solution used was "Joy" kitchen detergent (manufactured by P&G Japan LLC) (containing alkyl ether sulfate sodium, alkylamine oxide, etc., and weakly alkaline), diluted five times with water. The amount sprayed was approximately 3 liters.

[0075] (3) Ozone fumigation process After cleaning with an alkaline detergent, a weakly alkaline deodorant (sodium sesquicarbonate aqueous solution) was sprayed throughout the room (floor, walls, ceiling, etc.) to neutralize the acidic components contained in feces and urine. After spraying the deodorant, with the floor and walls still damp, a humidifier was set up and one circulating fan was operated in each room to maintain a temperature of 26-28°C and a humidity of 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, maintaining an ozone concentration of 6-8 ppm, and ozone fumigation was performed.

[0076] (4) Weakly acidic detergent spraying and washing process After the ozone fumigation process described above, the room was dried, and a weakly acidic detergent solution was sprayed onto the floor, walls, etc., and then cleaned using a steam cleaner. As the acidic detergent solution, "Scale Cut P" (manufactured by Yokohama Oil & Fat Industry Co., Ltd.), a bathroom cleaner containing citric acid, anionic surfactants, nonionic surfactants, etc., and weakly acidic, was used, diluted 10 times with water. The amount sprayed was 2 liters.

[0077] (5) Ozone fumigation process After the cleaning process using a weakly acidic detergent, a weakly acidic deodorizer (citric acid solution) was sprayed throughout the room (floor, walls, ceiling, etc.) to neutralize the alkaline components contained in feces and urine. After spraying the deodorizer, with the floor and walls still damp, a humidifier was installed and one circulating fan was operated in each room to maintain a temperature of 26-28°C and a humidity of 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, maintaining an ozone concentration of 6-8 ppm, and ozone fumigation was performed.

[0078] (6) Deodorizing sheet coating process After ventilating the room for about 20 minutes, we closed all the doors to the rooms, including the front door and windows, to prevent the smell from spreading. Then, we checked each room to see if any odor was rising from the foundation (plywood) underneath where the cushion flooring had been removed, or from the gypsum board where the plywood and wall (gypsum board) met perpendicularly. We decided to apply deodorizing sheets to any areas where the odor remained.

[0079] Specifically, before applying the deodorizing sheets, a heat gun (300°C) was applied to the smelly areas for about 3 minutes to warm the surface, both to remove moisture after washing and to improve the adhesion of the deodorizing sheets. Next, to ensure that the areas where odors remained were sufficiently covered, the heat-sealing layers of the aforementioned two-layer deodorizing sheet A (45cm x 45cm) were pressed tightly together, ensuring no air was trapped inside, and then heated and pressed down with an iron (220°C) for about 2 minutes per sheet, pressing down on the entire surface. In this case, seven deodorizing sheets were used in three locations in the Western-style room, and eight sheets were used in four locations in the kitchen. Where the deodorizing sheets were adjacent, they were partially overlapped and heated and pressed together. This covering with deodorizing sheets completely prevented odors from rising.

[0080] Odor levels after deodorization work is completed. After the deodorization treatment was completed, the levels of hydrogen sulfide and ammonia were 0 ppm. Furthermore, no animal odor was detected at all.

[0081] Odor situation one month after the completion of deodorization work. One month after the completion of the deodorization treatment, the odor levels were 0 ppm for both hydrogen sulfide and ammonia. Furthermore, no animal odor was detected at all.

[0082] Example 2 Case Study 2 (Example of deodorization work performed in a room where a cat was kept) The room (house) to be treated for deodorization is a house where a couple lived, with a total area of ​​90m². 2 Four cats had been kept for eight years in a 3LDK condominium. The cats were kept in one of the bedrooms, but the owners neglected them, no longer caring for their waste, and the room became a filthy mess. The couple decided to move out of the condominium, and the four cats were taken away by the animal shelter. When selling the condominium, it was determined that the property could not be appraised without removing the waste and odors, so we were asked to perform the odor removal work.

[0083] Situation at the start of deodorization work Upon entering the house, there was a distinct smell of cat urine. Entering the room where the cats were kept, located immediately to the left after stepping up from the entrance, I was hit by an overwhelming stench of cat urine that made it difficult to breathe. There was feces, but the distinctive smell of cat urine was intense. There were no remaining belongings, but there were several urine stains on the walls, and some parts of the flooring were covered in puddles of urine. Before the deodorization treatment, the odor levels measured at any point in the room were 1.5-2.5 ppm for hydrogen sulfide and 2.0-3.0 ppm for ammonia.

[0084] (1) Waste removal process Because the smell was so strong, I wore a face mask and protective clothing. I wiped up the urine that had accumulated on the floor, and used tongs and a spatula to remove any dried feces and urine residue, and then used a wet / dry vacuum cleaner to remove it further. Because the smell was so strong, I removed all the wallpaper from the room, and marked any urine stains on the drywall with an oil-based marker so that I could check them after cleaning. I was able to remove the source of the smell to the point where it was no longer visible.

[0085] (2) Alkaline detergent spraying and washing process A five-fold dilution of the kitchen detergent "Joy" (manufactured by P&G Japan LLC) (containing alkyl ether sulfate sodium, alkylamine oxide, etc., and weakly alkaline) with water was sprayed onto the floor, walls, etc., and the attached dirt and absorbed urine were cleaned using a deck brush or sponge. The amount sprayed was 2 liters.

[0086] Furthermore, the urine that had soaked into the plasterboard was treated by spraying an alkaline detergent solution, which was made by diluting "Kitchen Bleach" (manufactured by Kaneyo Soap Co., Ltd.) (containing sodium hypochlorite, alkylamine oxide, and sodium hydroxide, and being alkaline) with water at a 2:1 ratio. After allowing the solution to penetrate, it was cleaned using a steam cleaner. This process was repeated until the urine odor disappeared from the steam. The amount sprayed was 3 liters.

[0087] (3) Ozone fumigation process After cleaning with an alkaline detergent, a weakly alkaline deodorant (sodium sesquicarbonate aqueous solution) was sprayed throughout the room (floor, walls, ceiling, etc.) to neutralize the acidic components contained in feces and urine. After spraying the deodorant, while the floor and walls were still damp, an ozone fumigation device, Ozone Cluster 1400 (manufactured by Earthwalker Trading Co., Ltd.), was installed. The temperature was maintained at 24-26°C, a humidifier was installed, and one circulating fan was operated to maintain humidity above 70%. Ozone fumigation was performed by spraying 1400 mg / hr of ozone for approximately 90 minutes, maintaining the ozone concentration at 5-7 ppm.

[0088] (4) Weakly acidic detergent spraying and washing process After the ozone fumigation process described above, the room was dried, and a weakly acidic detergent solution was sprayed onto the floor and walls, followed by cleaning with a steam cleaner. The acidic detergent solution used was "Scale Cut P" (manufactured by Yokohama Oil & Fat Industry Co., Ltd.), a bathroom cleaner containing citric acid, anionic surfactants, nonionic surfactants, etc., and weakly acidic, diluted 10 times with water. This process was repeated several times until the odor disappeared from the steam cleaner's vapor. The amount sprayed was 3 liters.

[0089] (5) Ozone fumigation process After the cleaning process using a weakly acidic detergent, a weakly acidic deodorant (citric acid aqueous solution) was sprayed throughout the room (floor, walls, ceiling, etc.) to neutralize the alkaline components contained in feces and urine. After spraying the deodorant, with the floor and walls still damp, a humidifier was set up and one circulating fan was operated to maintain a temperature of 24-26°C and a humidity of 70% or higher. Then, using an ozone fumigation device, Ozone Cluster 1400 (manufactured by Earthwalker Trading Co., Ltd.), 1400 mg / hr of ozone was sprayed for approximately 150 minutes, maintaining the ozone concentration at 7-9 ppm, and ozone fumigation was performed.

[0090] (6) Demolition process and odor-proof sheet covering process After ozone fumigation and ventilation, the odor was checked, but the smell of urine still remained. Odor measurements revealed 0.3 ppm of hydrogen sulfide and 0.8 ppm of ammonia, indicating that the cat urine odor had not been completely removed from the flooring. There was a possibility that urine had flowed from between the wall and the flooring to the foundation below, so the flooring was dismantled and removed using an electric saw. It was then discovered that the urine had seeped down to the concrete below the floor. In addition, the joists and beams were also soaked with urine, so these were also dismantled and removed using an electric saw. The urine stains on the exposed concrete were approximately 2m 2 Therefore, the exposed concrete surface was subjected to the following steps again: (2) alkaline detergent spraying and cleaning, (3) ozone fumigation, (4) weak acid detergent spraying and cleaning, and (5) ozone fumigation. Thus, the demolition process was carried out.

[0091] After the ozone fumigation process, we ventilated the area for about 20 minutes, then closed all the doors to the rooms and windows to prevent the smell from spreading. We then brought our noses close to the concrete where the urine had soaked in and checked for odor. A slight odor remained, so we decided to apply odor-blocking sheets to the areas where the smell persisted.

[0092] Specifically, before applying the deodorizing sheets, the odorous areas were heated with a heat gun (300°C) for about 3 minutes to remove any remaining moisture after washing and to improve the adhesion of the deodorizing sheets. Next, to ensure that the areas where odors remained were sufficiently covered, the heat-sealing layers of the aforementioned three-layer deodorizing sheet B (45cm x 45cm) were pressed tightly together, ensuring no air was trapped inside, and then heated and pressed with an iron (220°C) for about 2 minutes per sheet, pressing down on the entire surface. In this case, 12 deodorizing sheets were used on the concrete surface. Where the deodorizing sheets were adjacent, they were partially overlapped and heated and pressed together. This covering with deodorizing sheets completely prevented odors from rising.

[0093] Odor levels after deodorization work is completed. After the deodorization treatment, the levels of hydrogen sulfide and ammonia were 0 ppm. Furthermore, no animal odor was detected at all.

[0094] Odor situation one month after the completion of deodorization work. One month after the completion of the deodorization treatment, the odor levels were 0 ppm for both hydrogen sulfide and ammonia. Furthermore, no animal odor was detected at all. [Industrial applicability]

[0095] The deodorizing method of the present invention is highly effective in deodorizing rooms with animal odors and allows for the restoration of the room to its original condition, making it suitable for use in deodorizing rooms with animal odors.

Claims

1. The following is a method for deodorizing rooms with animal odors, including the steps listed below. (1) A waste removal process that removes waste containing at least one of bodily fluids, feces, and urine; (2) A step of washing by spraying an alkaline detergent; (3) Ozone fumigation process, in which ozone is sprayed into the room after process (2); (4) A step of washing by spraying a weakly acidic detergent; (5) Ozone fumigation process in which ozone is sprayed into the room after process (4); (6) An odor-proof sheet coating process in which, after the ozone fumigation process (5), a multi-layer odor-proof sheet having an odor-proof layer and a heat-seal layer is heat-pressed onto the areas where odor-causing substances remain.

2. The deodorizing method according to claim 1, wherein a deodorizer is sprayed during the ozone fumigation process (3).

3. The deodorizing method according to claim 1, wherein a deodorizer is sprayed during the ozone fumigation process (5).

4. The deodorizing method according to claim 1, wherein the ozone fumigation steps (3) and (5) are performed by exposing the room to ozone at a temperature of 18 to 30°C, a humidity of 60 to 100%, and an ozone concentration of 1 to 30 ppm.

5. Furthermore, the deodorization method according to claim 1, further comprising a demolition step of dismantling the areas where the waste has permeated after the ozone fumigation step (5).

6. 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 at least one layer 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.

7. The deodorizing method according to claim 6, 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.

8. The deodorizing method according to claim 6, 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.

9. 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.

10. 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.

11. 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.

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