Method for preventing odor and aerosol used therefor

Abstract

To make the prevention of an offensive smell and the treatment of an offensive smell substance compatible.SOLUTION: A cover bag 2 and a storage bag 3 are attached to a Western-style toilet bowl 1 and pressed by a toilet seat 4. After excretion, a foam composition containing 25-40 wt.% of a surfactant, 40-55 wt.% of water and a propellant is sprayed to the filth from an aerosol 10 sealed in a container to form mousse-like and water-soluble foam 20 covering the filth and held for 12 hours or more. Thereafter, the excretion and the formation of the foam 20 by jetting are repeatedly performed and, when the housing bag 3 becomes full, the coagulant 30 is charged to coagulate the filth or the like and, thereafter, the housing bag 3 is taken out to be discarded. By the foaming composition, the foam 20 which is mousse-like and water-soluble and whose surface is kept in a mousse state for 24 hours or more can be formed, and an offensive smell can be prevented even when excretion is repeated. Finally, since the storage bag 3 is taken out and discarded, it can be easily and sanitarily discarded.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for controlling odors using foam formed by an aerosol. [Background technology]

[0002] Currently, flush toilets are used on a daily basis, but in the event of an earthquake or other disaster, water and sewer systems may be damaged and flush toilets may become unusable. As a result, in disaster-stricken areas, waste accumulates in the toilet bowl, causing unsanitary conditions and problems such as foul odors and the spread of pathogens, which can ultimately become serious problems that affect the health of disaster victims. In the event of a disaster, preventing foul odors and providing toilets that are easy to dispose of waste are often major challenges.

[0003] Of these, focusing on the problem of unpleasant odors, various methods have been studied to prevent the spread of unpleasant odors in toilets and the like by spraying aerosols. For example, Patent Document 1 discloses a method for preventing odor leakage in which an aerosol containing 70 to 80% by mass of a surfactant and a propellant is sprayed into the inside of a pipe. Patent Document 2 discloses a method for suppressing the emission of malodors from the source of malodors that occurs every time a toilet is used, using a foam aerosol consisting of a concentrate consisting of a surfactant, a foam stabilizer, and water, and a propellant. Patent Document 3 discloses a method for preventing odors by spraying a foam aerosol composition containing 10-20% by weight of propellant, 20-30% by weight of surfactant, 1-10% by weight of deodorant, and 55-65% by weight of pure water from a pressure vessel into a storage tank for malodorous substances, thereby covering the surface of the malodorous substances with a foam-like barrier film. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6082983 [Patent Document 2] Japanese Patent Application Laid-Open No. 2001-19942 [Patent Document 3] Japanese Patent Application Laid-Open No. 2001-112858 Summary of the Invention [Problem to be solved by the invention]

[0005] However, all of the conventional technologies have been insufficient in terms of preventing unpleasant odors and treating odor-emitting materials in environments where washing with water is not possible, such as during disasters. For example, the technology described in Patent Document 1 is a method for preventing odors in pipes, and since the foam needs to remain inside the pipes, it needs to be at least a certain hardness. However, if such hard foam is used to treat odorous substances together with the foam, the foam becomes bulky, causing odors to leak and preventing efficient treatment. The technology described in Patent Document 2 has a foam duration of 50% for 5 minutes, which may be suitable for everyday use, but it cannot prevent unpleasant odors for long periods of time in situations where washing with water is not possible for long periods of time, such as during a disaster. The technology described in Patent Document 3 also produces foam that lasts for several hours after spraying, which is by no means a sufficient duration. In addition, because the foam contains a high amount of water, there is a risk of spillage when treated together with waste, and the overall weight increases, making it difficult to say that it is suitable for treatment. Furthermore, although it may be possible to prevent the spread of odors by sealing the odor-causing substance in a bag or the like and disposing of it each time it is produced, this is extremely cumbersome and also poses the problem of consuming a large number of bags.From the perspective of disposing of odor-causing substances, the convenience of being able to dispose of the odor-causing substances all at once after repeatedly adding them is also important.

[0006] The challenge of preventing odors while also treating odor-causing substances is not necessarily limited to toilets during disasters; it can also arise in normal times and in situations other than toilets, such as in trash bins for disposing of food waste. Therefore, an object of the present invention is to provide a technology that can simultaneously prevent offensive odors and treat substances that cause offensive odors. [Means for solving the problem]

[0007] The present invention provides an odor prevention method for preventing the diffusion of odors, comprising: (a) preparing a storage unit for storing an odor-emitting substance; (b) spraying a foaming composition containing 25-40% by weight of a surfactant, 40-55% by weight of water, and a propellant from an aerosol container onto the off-odor substance contained in the container, thereby forming a mousse-like, water-soluble foam that covers the off-odor substance and whose surface remains in a mousse state for 24 hours or more; (c) repeating steps (a) and (b) within the range that can be accommodated in the accommodation section.

[0008] In the present invention, the offensive odor can be prevented by storing an offensive odor substance in the storage section and covering it with foam.

[0009] The storage unit is a container capable of storing odorous substances, and in the case of waste, it can be a toilet. It can also be a plastic bucket or other container for throwing food waste, or a hole dug in the ground. To facilitate disposal of odorous substances and enable the storage unit to be reused, a bag or the like for storing odorous substances can be attached to the inside of the storage unit. By storing odorous substances in such a storage unit, the odor will be primarily diffused from the opening of the storage unit.

[0010] The foul-smelling substance is then covered with foam formed by spraying the foaming composition. The foam is mousse-like, and therefore can prevent the diffusion of foul odors. This foaming composition contains 25 to 40 wt % of a surfactant and 40 to 55 wt % of water. First, by containing sufficient water, the foam does not become hard as described in Patent Document 1, but rather dissipates appropriately, making it suitable for treatment. Furthermore, in order to form a mousse-like foam that can prevent foul odors, the surfactant content is preferably 25 wt % or more. Conversely, in order to ensure appropriate dissipation, the surfactant content is preferably kept to 40 wt % or less. The composition of the foaming composition of the present invention is determined taking into account this balance.

[0011] The density of the foam formed by the aerosol of the present invention is 0.02 g / cm 3 It was found that the following results were obtained. The formation of such extremely lightweight foam means that the foaming composition has a high expansion rate. This makes it possible to make the size of the aerosol container that supplies the foam necessary for deodorization compact. In addition, the light mass of the foam also contributes to reducing the weight when treating odorous substances.

[0012] Furthermore, because the foam surface remains in a mousse state for 24 hours or more, even when repeatedly used, such as covering an odorous substance with foam, then adding another odorous substance and covering it again with foam, the odor diffusion prevention effect is maintained until the next odorous substance is added. Experimental results have shown that, according to the present invention, the odor diffusion prevention effect is maintained for 21 hours or more after spraying, and even after 24 hours, the odor diffusion prevention effect is maintained at a level comparable to that at the time of spraying. In particular, considering that the present invention is used to treat waste and that the toilet is used an average of 5 to 6 times a day, it is preferable that the odor diffusion prevention effect be maintained for at least 12 to 24 hours. From this perspective, the foam retention time of the present invention is understood to be extremely useful.

[0013] A mousse state refers to a state in which fine bubbles are formed densely enough to prevent the diffusion of unpleasant odors. Generally, bubbles formed by surfactants coalesce over time, forming larger bubbles, which then burst and disappear. "Maintaining the mousse state" means that the size and density of the bubbles after spraying are generally maintained, and no significant coalescence occurs that is visible to the naked eye. In the present invention, it was confirmed through experiments that the coalescence of bubbles occurs from the interface side with the malodorous substance, and does not occur on the surface exposed to the air even after 24 hours.

[0014] Furthermore, the foam of the present invention is water-soluble. When repeatedly adding an odorous substance and covering it with foam, in order to effectively prevent the odor, it is desirable that the foam added from the second time onwards blends airtightly with the foam already sprayed to the extent that the odor does not escape. When water-soluble foam is used, it has been found that the added foam blends very well with the existing foam, and the odor prevention effect can be maintained even after repeated penetration of the odorous substance and spraying of the foam.

[0015] Various substances such as LPG, carbon dioxide, and nitrogen gas can be used as the propellant. The foaming composition may also contain a small amount of a solvent component such as isopropyl alcohol to facilitate smooth jetting.

[0016] As described above, according to the present invention, the permeation of odorous substances and the spraying of foam can be repeatedly performed, making it possible to prevent the diffusion of odorous substances and treat the odorous substances at the same time. In particular, the method of the present invention does not require the use of water, which has the advantage that it can be carried out even in environments where the use of water is limited, such as during disasters.

[0017] In the odor prevention method of the present invention, (d) The method may further comprise a step of solidifying the contents of the storage section with a coagulant and then discarding the contents.

[0018] This allows for easy disposal of malodorous substances. The coagulant is not particularly limited, and various well-known coagulants may be used.

[0019] In the present invention, the container is a toilet bowl, The malodorous substance may be filth.

[0020] As explained above, in the present invention, the storage unit and the odor-causing substance can be selected arbitrarily, but by using a toilet bowl as the storage unit as described above, the present invention can be used for waste treatment in a toilet. When used in a toilet, the present invention is highly useful in that it can prevent odors, can be used for repeated excretion, and can be treated all at once. It is optional whether or not to use a coagulant during treatment.

[0021] Furthermore, when the present invention is used in a toilet, the foam covers the waste, thereby suppressing the spread of germs from the waste, making it hygienic. Furthermore, the foam also helps maintain a hygienic appearance by hiding the waste. When re-excreting, the foam can also prevent existing waste from splashing back onto the user's buttocks. Thus, the present invention is highly useful for use in toilets.

[0022] When the present invention is used in a toilet, The step (a) may be a step of attaching a bag for storing waste to the inside of the Western-style toilet bowl as the storage section, and pressing down the bag from above with the toilet seat.

[0023] By attaching the bag in this way, waste can be disposed of while still in the bag, making disposal easier. Also, in Western-style toilets, the bag can be easily held in place by using the toilet seat to prevent it from slipping, and it is also hygienic because the buttocks do not come into direct contact with the bag. Various bags can be used, such as resin bags made of polyethylene or vinyl chloride resin, paper bags, cloth bags, etc. When using paper bags or cloth bags, it is preferable to waterproof them to prevent leakage. These bags can be used for purposes other than toileting.

[0024] The present invention can be configured as an odor control method as well as an aerosol for use therein. For example, an aerosol for preventing the spread of odors, a foaming composition comprising 25 to 40% by weight of a surfactant, 40 to 55% by weight of water, and a propellant; The foaming composition may be an aerosol comprising a container that contains the foaming composition in a sprayable state.

[0025] By using such an aerosol, it is possible to form a mousse-like, water-soluble foam that covers off odorous substances and whose surface remains in a mousse state for 24 hours or more, as explained above.

[0026] In the aerosol of the present invention, The surfactant content is more preferably 30 to 40% by weight.

[0027] This allows for more suitable foam to be formed.

[0028] In the present invention, The surfactant may be an aliphatic amine derivative.

[0029] Various surfactants can be used, but it has been found that suitable foam can be formed by using an aliphatic amine derivative, for example. More specifically, it is preferable to use a mixed fatty acid triethanolamine obtained by adding triethanolamine to a mixture of palmitic acid and stearic acid. As a specific example of a raw material, for example, "Sunfoam P-30" manufactured by Sugimura Chemical Co., Ltd., which contains an aliphatic amine derivative as its main component, can be used.

[0030] The aerosol of the present invention comprises The foam composition may further comprise a foam stabilizer.

[0031] This makes it possible to more stably hold the foam when sprayed. Examples of foam stabilizers that can be used include amide acids, hydroxyammonium salts, ethylene oxide adducts of alkylamines, sulfoxides, maleic acid derivative condensates, and fatty acid polyhydric alcohol esters. More specifically, 1:2 coconut fatty acid diethanolamide, which is obtained by condensing one mole of coconut fatty acid with two moles of diethanolamine, can be used. The amount of foam stabilizer should be adjusted so that the sprayed foam surface remains in a mousse state for at least 24 hours. The foam stabilizer is not essential, and may be omitted if the foam can be sufficiently maintained.

[0032] The present invention does not necessarily have to have all of the above-mentioned features, and some of them may be omitted or combined as appropriate. It may also be realized as a disaster toilet set that includes the above-mentioned aerosol and bags used to implement the odor prevention method for toilets. [Brief explanation of the drawings]

[0033] [Figure 1] FIG. 1 is an explanatory diagram showing the steps of an odor prevention method according to an embodiment of the present invention. [Figure 2] FIG. 10 is an explanatory diagram showing the state of bubble formation in an example. [Figure 3] FIG. 10 is an explanatory diagram showing the state of foam retention in an example. [Figure 4] FIG. 10 is an explanatory diagram showing the state of foam retention in an example. [Figure 5] FIG. 1 is an explanatory diagram showing the offensive odor prevention effect in an example. DETAILED DESCRIPTION OF THE INVENTION

[0034] Hereinafter, an embodiment of the present invention will be described taking as an example a case where the present invention is applied to a toilet. FIG. 1 is an explanatory diagram showing the steps of an odor prevention method according to an embodiment of the present invention. As shown in Fig. 1(a), in this embodiment, a Western-style toilet bowl 1 is used as a storage section for storing odorous substances. In the first step, a cover bag 2 is placed over the Western-style toilet bowl 1. Next, as shown in Figure 1(b), a waste collection bag 3 is placed inside the cover bag 2, and the toilet seat 4 is pressed down on top of the collection bag 3. This prevents the cover bag 2 and the collection bag 3 from shifting. Also, the toilet seat 4 can be the same as that of a normal Western-style toilet, so the toilet's usability is not affected.

[0035] In this embodiment, the waste is contained in the collection bag 3, so the cover bag 2 can be omitted. However, since the inside of the Western-style toilet 1 is not necessarily clean in the event of a disaster, if the collection bag 3 is attached directly to the Western-style toilet 1, the outside of the collection bag 3 may become dirty, which may result in adverse effects such as unhygienic conditions when removing the collection bag 3 and disposing of the waste. In contrast, if the cover bag 2 is placed over the inside of the Western-style toilet 1 and then the collection bag 3 is attached, the outside of the collection bag 3 can be kept clean, which has the advantage of maintaining hygiene when disposing of it.

[0036] In this embodiment, resin bags made of polyvinyl chloride resin, so-called vinyl bags, are used for the cover bag 2 and the storage bag 3. Various types of bags can be used, such as resin bags made of polyethylene, paper bags, and cloth bags. When using paper bags or cloth bags, it is preferable to waterproof them to prevent leakage. Moreover, the cover bag 2 and the storage bag 3 may be the same or different. For example, the cover bag 2 may be waterproofed or water-repellent on the outside because it is used to protect the outside of the storage bag 3. On the other hand, the storage bag 3 may be waterproofed on the inside to prevent leakage of odorous substances and moisture generated therefrom.

[0037] With the cover bag 2 and the storage bag 3 attached and held down by the toilet seat 4, the user defecates as shown in Figure 1(c). As mentioned above, the normal toilet seat 4 can be used, so it can be used without any discomfort compared to normal use. It should be noted that the toilet seat 4 may be a toilet seat provided for the toilet of the embodiment, instead of the one provided with the Western-style toilet 1.

[0038] When the excretion is finished, as shown in Figure 1(d), the button 11 of the aerosol 10 is pressed to spray foam 20 from the nozzle 12, covering and concealing the waste. This makes the waste invisible, maintaining a sense of hygiene and preventing the smell of waste. The foam 20 also prevents unpleasant odors and inhibits the spread of germs.

[0039] The states of Figures 1(c) and 1(d) can be repeated until the storage bag 3 is full. In other words, the person excretes, covers the waste with foam as shown in Figure 1(d), and then at the next timing, excretes as shown in Figure 1(c), and the waste is covered with foam as shown in Figure 1(d). This process is repeated. From the second time onwards, most of the waste is already covered with foam, so foam can be replenished as needed, such as to fill holes in the foam caused by excretion or to cover waste that has fallen on top of the foam.

[0040] In this embodiment, the foam 20 covers the waste, so it can be reused without any unsanitary feelings. Also, because the foam 20 covers the waste, it is possible to prevent existing waste from splashing onto the user's buttocks. In this way, this embodiment is also useful in that it makes it easy to reuse the toilet.

[0041] Here, the aerosol 10 of this embodiment will be described. The aerosol of this embodiment is a foaming composition containing 25 to 40% by weight, preferably 30 to 40% by weight, of a surfactant, 40 to 55% by weight of water, and a propellant, and is contained in a container in a sprayable state. The container can have a well-known structure that allows the foaming composition to be sprayed by pressing button 11. Although various surfactants can be used, it has been found that suitable foam can be formed by using an aliphatic amine derivative, for example. As a specific example of a surfactant, "Sunfoam P-30" manufactured by Sugimura Chemical Co., Ltd., which contains an aliphatic amine derivative as its main component, can be used. The foam composition may further contain a foam stabilizer such as an amide acid, a hydroxyammonium salt, an ethylene oxide adduct of an alkylamine, a sulfoxide, a maleic acid derivative condensate, or a fatty acid polyhydric alcohol ester.

[0042] By using this aerosol, it is possible to form a mousse-like, water-soluble foam that covers waste and whose surface remains in a mousse state for 24 hours or more. Forming a mousse-like foam effectively prevents unpleasant odors. Because the surface of the foam remains in a mousse state for 24 hours or more, the unpleasant odor prevention effect can be maintained for 21 hours or more after spraying, and even after 24 hours, the unpleasant odor diffusion prevention effect can be maintained at a level comparable to that at the time of spraying. Therefore, if excretion (Figure 1(c)) occurs approximately once or twice a day, foam will be replenished as needed (Figure 1(d)), making it possible to continuously prevent unpleasant odors while the toilet is in use.

[0043] When the collection bag 3 is filled with waste in this way, as shown in Figure 1(e), a coagulant 30 is poured into the collection bag 3 to coagulate the contents of the collection bag 3. Then, as shown in Figure 1(f), the full collection bag 3a is removed and discarded. Also, as shown in Figure 1(f), the collection bag 3 can be reattached to the Western-style toilet 1 and used for excretion (Figure 1(c)) and foam spraying (Figure 1(d)). When replacing the storage bag 3, it is not necessary to replace the cover bag 2.

[0044] The density of the foam formed by the aerosol in this example is 0.02 g / cm 3Another feature is that the foam composition has the following properties. The formation of such extremely lightweight foam means that the foaming composition has a high expansion rate. This makes it possible to make the size of the aerosol container that supplies the foam necessary for deodorization compact. In addition, the light mass of the foam also contributes to reducing the weight when treating odorous substances.

[0045] FIG. 2 is an explanatory diagram showing the state of foam formation in the example. Figure 2(a) shows the state before foam was sprayed. It shows the inside of the toilet seat 4 of the Western-style toilet. Garbage D1 simulating waste was placed inside the Western-style toilet. FIG. 2(b) shows the state after foam 20 has been sprayed. As explained in FIG. 1, foam 20 was sprayed from nozzle 12 of aerosol 10. Because foam 20 is mousse-like, it is able to cover and conceal dust D1, as can be seen by comparing with FIG. 2(a). Dust D1 does not have an unpleasant odor, but even if it did emit an unpleasant odor, foam 20 can prevent the odor. 2(c) illustrates a situation where the toilet has been used repeatedly, and trash D2, which simulates waste, has been placed on top of the foam 20 that has already been sprayed. In this example, the trash D2 is placed on top of the foam 20, but the trash D2 may sink below the foam 20, forming a hole in the foam 20. When the toilet is used repeatedly, the aerosol 10 sprays the foam so as to cover the trash D2 or fill the hole that has formed. FIG. 2(d) shows the state after foam has been added. By adding foam 20A from the nozzle 12 of the aerosol 10, the existing foam 20 can be combined to cover and conceal the debris D2. If holes are formed, the additional foam 20A can be similarly filled in. As a result, even with repeated use, the debris can be covered and concealed, and unpleasant odors can also be prevented. 2(d), it can be seen that the existing foam 20 and the added foam 20A blend so well together that the boundary between them is indistinguishable, and they are practically integrated. This is because the foam in this example is water-soluble. Water-soluble foams blend well together in this way, making them very suitable for repeated use.

[0046] 3 and 4 are explanatory diagrams showing the state of foam retention in the example. For the experiment, 200 ml of water was poured into a 500 ml beaker, foam was sprayed onto it to a height of about 50 mm, and the state of the foam after spraying was observed. Figure 3(a) shows the state seen from the side immediately after spraying. It can be seen that the foam has reached the top of the beaker. Figure 3(b) shows the state seen from above. When viewed in the photograph, it can be seen that the surface of the foam is densely formed with tiny bubbles that are too small to be seen with the naked eye, and that it has become a mousse-like substance.

[0047] Figure 3(c) and Figure 3(d) show the foam viewed from the side and top, respectively, one hour after injection. Figure 3(e) and Figure 3(f) show the foam as seen from the side and top, respectively, 6 hours after injection. Figure 4(a) and Figure 4(b) show the foam as seen from the side and top, respectively, 12 hours after injection. Figure 4(c) and Figure 4(d) show the foam as seen from the side and top, respectively, 24 hours after injection. From the above photographs, it can be seen that the height of the foam does not decrease at all until 24 hours after spraying, and in fact tends to increase. It can also be seen that the surface of the foam remains in almost the same state as when it was sprayed, i.e., in a mousse state.

[0048] Figure 4(e) shows the foam as seen from the side 48 hours after injection. It can be seen that the foam has reached the top of the beaker and is still at the same height as it was immediately after injection. On the other hand, it can be seen that a void has formed on the bottom of the foam, i.e., at the interface with the water (around the tip of arrow A in the figure). This confirms that in this example, the bubbles coalesce significantly at the interface with the water. Figure 4(f) shows the foam as seen from above 48 hours after spraying. As can be seen by comparing it with the state after 24 hours (Figure 4(d)), after 48 hours (Figure 4(f)), large bubbles formed by coalescence can be seen on the surface of the foam, as well as traces of bubbles that have popped and disappeared. In other words, after 48 hours, the mousse state can no longer be maintained on the surface of the foam. From the above experiment, it was confirmed that in this example, the surface remained in a mousse state for 24 hours after the foam was sprayed.

[0049] Next, the offensive odor prevention effect of this embodiment will be described. Figure 5 is an explanatory diagram showing the odor-preventing effect in the example. First, 200 ml of ammonia water was placed in a 500 ml beaker as the odor source. The concentration of the ammonia water was 0.01 w / v%. In this state, the ammonia concentration was measured using a desiccator (SHIBATA017440-250) and found to be 40 ppm. Next, the aerosol of this example was sprayed onto the ammonia water to form bubbles 30 mm high, and the relationship between the elapsed time and the ammonia concentration was measured using a desiccator. Figure 5 shows the measurement results. The ammonia concentration gradually increased until three hours after injection, peaking at approximately 7 ppm three hours after injection. It then began to decrease, dropping to approximately 5 ppm 12 hours after injection. It then began to increase again, reaching approximately 8 ppm 24 hours after injection. The peak value (approximately 7 ppm) three hours after injection was reached 22.5 hours after injection.

[0050] As a result of the above, it was confirmed that in this example, the effect of preventing the diffusion of offensive odors at the time of injection was maintained for a period of 22.5 hours after injection (at least 21 hours or more). Also, considering that the measurement result without the foam of this example being injected was 40 ppm, when the foam of this example was injected, it was 8 ppm even after 24 hours, it was confirmed that the effect of preventing the diffusion of offensive odors at the time of injection was maintained even after 24 hours had passed.

[0051] It is not necessary to have all of the various features described in the above embodiments, and some of them can be omitted or combined as appropriate. Furthermore, the present invention is not limited to the above-described embodiment and can be implemented in various modes. For example, the present invention can be used not only in times of disaster but also in normal times. It can be used not only in toilets but also when throwing foul-smelling materials such as food waste into plastic buckets or other containers. It can also be used when throwing foul-smelling materials into holes dug in the ground instead of Western-style toilets. [Industrial Applicability]

[0052] The present invention can be used to prevent odors by utilizing the foam formed by the aerosol. [Explanation of symbols]

[0053] 1 Western-style toilet 2 cover bags 3, 3a Storage bag 4 toilet seats 10 Aerosol 11 Buttons 12 nozzles 20, 20A foam 30 Coagulant D1, D2 garbage

Claims

1. An odor prevention method for preventing the diffusion of odors, comprising: (a) preparing a storage unit for storing an odor-emitting substance; (b) spraying a foaming composition containing 25-40% by weight of a surfactant, 40-55% by weight of water, and a propellant from an aerosol container onto the offensive odor substance contained in the container, thereby forming a mousse-like, water-soluble foam that covers the offensive odor substance and whose surface remains in a mousse state for 24 hours or more; (c) A method for preventing odors, comprising a step of repeatedly performing steps (a) and (b) within the range that can be accommodated in the storage section.

2. The odor prevention method according to claim 1, further comprising: (d) An odor prevention method comprising a step of solidifying the contents of the storage section with a coagulant and then disposing of the contents.

3. The odor prevention method according to claim 1, the container is a toilet bowl, The odor preventing method, wherein the malodorous substance is filth.

4. The odor prevention method according to claim 3, The odor prevention method includes step (a) of attaching a bag for storing waste to the inside of a Western-style toilet bowl as a storage section and pressing down on the bag from above with the toilet seat.

5. An aerosol for preventing the spread of odors, a foaming composition comprising 25-40% by weight of a surfactant, 40-55% by weight of water, and a propellant; and a container that contains the foaming composition in a sprayable state.

6. 6. The aerosol of claim 5, The aerosol contains 30 to 40% by weight of the surfactant.

7. 6. The aerosol of claim 5, The aerosol wherein the surfactant is an aliphatic amine derivative.

8. 6. The aerosol of claim 5, The foaming composition further comprises a foam stabilizer.

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