Portable toilet sheet
The portable toilet sheet with superabsorbent polymer and non-woven fabric addresses the challenges of excrement treatment in emergencies by offering quick, hygienic, and odor-controlled excretion, ensuring cleanliness and easy disposal.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- 江野 里美
- Filing Date
- 2026-01-27
- Publication Date
- 2026-04-28
AI Technical Summary
Conventional excrement treatment methods in simple toilets during disasters are time-consuming, require effort, and pose challenges for elderly and children, leading to odor issues and potential infections, especially in emergency situations where portable toilets may not be available.
A portable toilet sheet comprising an absorbent part with a superabsorbent polymer and non-woven fabric, featuring enhanced absorption zones and adhesive tape for secure fit, which instantly absorbs urine and prevents infection, and can be easily installed on various toilet types.
The portable toilet sheet provides quick, hygienic, and odor-controlled excretion solution, suitable for emergencies, preventing infections and ensuring cleanliness by minimizing contact with excrement, and facilitating easy disposal.
Smart Images

Figure 0003255670000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a simple toilet seat. More specifically, it relates to a compact simple toilet seat used in situations such as disasters, caregiving, and outdoor activities.
Background Art
[0002] Conventionally, coagulants have been used for excrement treatment in toilets during disasters. However, it takes a certain amount of time and effort to uniformly solidify the entire excrement. Also, considering the long duration of disaster recovery work and the possibility of the coagulant running out, the conventional excrement treatment method in simple toilets is a concern.
Prior Art Documents
Patent Document 1
Patent Document 2
Disclosure of the Invention
Problems to be Solved by the Invention
[0003] Patent Document 1 states that a coagulant is put in for the excrement treatment method when using a simple toilet to solidify it. However, it is not easy to pour the coagulant throughout, and the treatment method seems difficult for the elderly and children.
[0004] In the collapse of houses during disasters such as earthquakes and tsunamis, it is conceivable to use outdoors. Until a simple toilet is installed, the excrement odor becomes a problem. In a group living situation in a shelter or the like, the occurrence of influenza and O157 is feared, which may lead to a group infection.
[0005] The toilet situation in an emergency is a troublesome situation for both disaster victims and volunteers. It is necessary to quickly solve the problem of a simple toilet that can be easily installed and a method for treating excrement. In an emergency, it is desirable that the installation is simple and it can be used both indoors and outdoors.
[0006] Conventional portable toilets require users to sit down and then sprinkle a coagulant after defecation. However, in the event of a sudden disaster, there is no guarantee that a portable toilet that can be sat on will be available. Setting up portable toilets also takes time, so many disaster victims choose to live outdoors to avoid various problems and dangers. In particular, elderly people and those undergoing medical treatment may experience frequent urges to urinate and defecate and may not be able to control them, leading many to stay outdoors instead of entering evacuation centers. Thus, toilet-related problems are unavoidable for everyone, and there is a need for a toilet that allows for smooth excretion and requires minimal effort in waste disposal. [Means for solving the problem]
[0007] The first invention relates to a portable toilet sheet characterized by comprising an absorbent part formed in the shape of a bag having an opening, and an outer edge part made of nonwoven fabric that is continuous with the opening and covers the entire toilet seat. The integrated absorbent sheet contains a superabsorbent polymer, eliminating the need to sprinkle a coagulant after excretion. The properties of the superabsorbent polymer are maximized to instantly absorb urine, and the non-woven fabric wrapping the toilet seat also helps prevent infection.
[0008] The portable toilet sheet according to the second invention is characterized in that, in addition to the portable toilet sheet according to the first invention, it further includes an absorption-enhancing zone on the front and bottom surfaces of the absorbent area, which has an increased amount of absorbent material. By using an enhanced absorbency zone in areas where urination is concentrated, leakage can be prevented even when used by adults with large urine volumes. In addition, increasing the amount of citric acid and activated carbon contained in the superabsorbent polymer neutralizes ammonia odor and suppresses odor.
[0009] The portable toilet sheet according to the third invention is characterized in that the absorbency-enhancing zone of the portable toilet sheet according to the second invention is colored differently from the other parts of the absorbent section. The enhanced absorption zone has higher water absorption than the absorbent sheet portion, so when the entire enhanced absorption zone changes color, it indicates that the absorption capacity has reached its limit, and the time for replacement can be visually determined.
[0010] The fourth invention is characterized by having a slip-preventing material made of an elastic material to prevent the outer edge of the first invention from slipping off the toilet seat. By using the elastic material at the edge of the nonwoven fabric to cover the underside of the toilet seat, the elastic material covering both the toilet seat body and the outer edge of the nonwoven fabric cover can be secured to prevent it from slipping down.
[0011] The portable toilet seat according to the fifth invention is characterized in that the outer edge of the portable toilet seat according to the fourth invention is provided with adhesive tape at the part where the outer edge and the toilet seat come into contact, so that the outer edge does not slip off the toilet seat. Depending on the shape of the toilet seat, the elastic material in the non-woven toilet seat cover may not be sufficient to cover the seat properly. The non-woven fabric toilet seat cover may slip off. To prevent this, adhesive tape is provided on the front, back, left, and right sides of the non-woven fabric toilet seat cover.
[0012] The portable toilet seat according to the sixth invention is a portable toilet seat according to any of the first to fifth inventions, characterized in that it is a portable toilet seat that is installed on the upper flat surface of a box-shaped temporary toilet. When installing the portable toilet seat according to the first to fifth designs onto a temporary toilet box made of cardboard or similar material, it is important that the user can sit down with peace of mind. To secure the nonwoven fabric toilet seat cover to the top of the temporary toilet box, adhesive tape is used on the back of the nonwoven fabric cover to prevent slippage. Adhesive tape is provided on the front, back, left, and right sides of the nonwoven fabric toilet seat cover, and by securing all four sides, the nonwoven fabric toilet seat cover can be installed stably and function as a hygienic toilet seat cover. Used portable toilet seats can be easily removed from the temporary toilet box, and the soiled material can be rolled up, placed in a resealable bag that also serves as an odor proof, and disposed of as combustible waste. [Effects of the Invention]
[0013] The portable toilet seat of this invention is a compact, foldable sheet that can be easily used by simply unfolding it and placing it on the toilet seat. When used indoors, the non-woven fabric on the seat surface also serves as an infection prevention measure, and since it is disposable, cleanliness can be maintained each time by replacing the sheet, thus preventing infection. Outdoors, it can be used in the same way as a Japanese-style toilet, and when disposing of it, simply roll up the sheet and put it in a resealable bag with a zipper, which prevents the smell of excrement, making it easy and hygienic to dispose of. For example, when stuck in traffic on a highway or similar road, one may be forced to hold in their bodily functions until they reach a service area; this can also be used in such situations. Furthermore, many elderly patients have difficulty controlling their urination and defecation, and holding back their excretions is distressing. Therefore, the simple toilet seat of this invention is characterized by its ability to allow excretion even inside a car, and by its easy disposal method for waste after use. This invention aims to temporarily solve toilet problems in emergency situations by allowing users to carry a set of a portable toilet sheet, toilet paper, and alcohol wipes in a resealable bag, thus maintaining a minimum level of cleanliness during excretion. The portable toilet sheets have been made compact so that they can be distributed to disaster victims to alleviate their concerns about toilets during earthquakes and other disasters. During disasters, elderly people in particular may frequently complain of the urge to urinate due to concerns about toilets, or their health may deteriorate due to restricting fluid intake because of these concerns. The widespread availability of portable toilet sheets will allow them to relieve themselves with peace of mind, reducing their worries and the burden of care. [Brief explanation of the drawing]
[0014] [Figure 1] Figure 1 is a perspective view of a portable toilet sheet. [Figure 2] Figure 2 is a diagram of the portable toilet sheet. [Figure 3] Figure 3(a) shows the area before the installation of the portable toilet sheet. Figure 3(b) shows the area after the installation of the portable toilet sheet. [Figure 4] Figure 4 shows a box-shaped temporary toilet. [Figure 5]FIG. 5 is a cross-sectional view of a box-shaped temporary toilet. Embodiments for Implementing the Present Invention
[0015] Hereinafter, embodiments of the simple toilet seat of the present invention will be described in detail based on the drawings.
[0016] As shown in FIG. 1, the simple toilet seat 10 of the present invention includes a polymer absorbent sheet 11 formed in a bag shape and an opening 22 surrounded by a non-woven fabric 12 that also serves as a measure against infection. An elastic member 13 for preventing displacement is sewn to the tip of the non-woven fabric 12. The toilet seat cover 12 made of a non-woven fabric that also serves as a measure against infection has adhesive tapes 19 on the front, back, left, and right so as not to slip off. When collecting the used simple toilet seat 10 into a small bundle, the adhesive tape 19 can be used to make the sheet into a small bundle. By rolling up the dirt into a small ball, the excretory odor can be confined and put into a sealed bag with a chuck and disposed of as combustible waste.
[0017] As shown in FIG. 2, the simple toilet seat 10 includes absorption amount enhancement bands 14 and 15 that instantaneously absorb urine with an increased amount of polymer absorbent on the bottom surface and the front surface of the polymer absorbent sheet 11. The absorption amount enhancement bands 14 and 15 with a higher content of the polymer absorbent can absorb multiple urinations if it is the urine volume of a child. The limit of the water absorption amount can be known by the darker color of the entire absorption amount enhancement bands 14 and 15 when it is time to replace. The replacement time of the simple toilet seat is when the water absorption amount of the absorbent sheet exceeds the limit, or it can be processed each time there is defecation. After defecation, in order to suppress the odor of feces in the simple toilet seat, it is rolled up small to wrap the feces and fastened with the provided adhesive tape 19, put into a sealed bag with a chuck, and discarded. Since there is also concern about water in case of a disaster, cleanliness is maintained with the provided alcohol wipes after excretion.
[0018] As shown in FIG. 3, in the case of a toilet in a home, in order not to touch the standing water inside the toilet bowl, the toilet seat 20 is lifted, a garbage bag is laid inside the toilet bowl, and the toilet seat 20 is lowered. As shown in FIG. 3(a), the simple toilet seat 10 is spread out in a bag shape and inserted into the previously laid garbage bag. As shown in Figure 3(b), when the portable toilet seat 10 is placed on the toilet bowl, the nonwoven fabric 12 is placed over the toilet seat, and the elastic member 13 provided on the nonwoven fabric 12 is covered up to the underside of the toilet seat, so that the nonwoven fabric 12 fits to the underside of the toilet seat 20 as a toilet seat cover.
[0019] When setting the portable toilet seat 10 on the toilet seat, if the nonwoven toilet seat cover 12 cannot be secured by the elastic material 13 on the underside of the toilet seat due to differences in the type and shape of the toilet bowl, the adhesive tape 19 provided on the nonwoven toilet seat cover 12 can be used on the front, back, left, and right sides of the nonwoven toilet seat cover 12 to accommodate various toilet seats. The adhesive tape 19 can also be used to temporarily fasten the portable toilet seat when disposing of it after use.
[0020] As shown in Figure 2, the bottom and front sections are equipped with enhanced absorbency zones to ensure that excreted urine is absorbed instantly. The enhanced absorbency zones 14 and 15 are super absorbent zones with increased polymer content, resulting in superior water absorption. The enhanced absorbency zone 15 in Figure 5 is particularly designed to capture a wide area of urine during urination, extending to the top of the absorbent sheet to capture the urine of a seated adult male as quickly as possible.
[0021] In the event of a sudden disaster, people struggle to find a toilet where they can perform basic physiological functions such as defecation and urination. For patients who are ill or recovering from illness and have difficulty controlling their bowel movements, having to endure the urge to defecate is particularly unbearable. While temporary toilets made of cardboard or similar materials, as shown in Figure 4, can be used until portable toilets are installed or recovery efforts begin, the portable toilet sheet of this invention can also be installed on these temporary toilets. As shown in Figure 4, when a box made of cardboard or similar material is formed into a stable shape and used as a temporary toilet, this portable toilet sheet can be set in the opening of the box to create a temporary toilet. The nonwoven fabric 12, which covers the upper side of the box-shaped temporary toilet and the opening of the box, is equipped with adhesive tape 19 to prevent shifting. This allows the nonwoven fabric 12 covering the upper edge of the box-shaped temporary toilet to be easily attached with the adhesive tape 19, enabling safe seating on the box-shaped temporary toilet. The portable toilet seat can be used hygienically in various situations, such as during disasters.
[0022] The absorbent sheet 11 of the portable toilet sheet, which is formed in a bag shape with the absorbent material 11 and absorption-enhancing zones 14 and 15 shown in Figure 2, absorbs urine that splashes during urination, so hands do not get dirty when urinating during disposal. When an adult male urinates while sitting, if the urine is concentrated in a certain area, it may seem that it cannot be absorbed instantly and accumulates at the bottom, but the urine is absorbed to some extent on the spot, and if a large amount of urine is excreted at once, it will seep down to the bottom. The moisture that cannot be absorbed is dispersed in the absorbent layer of the bottom part 14, and most of the moisture is absorbed and dispersed in the absorption-enhancing zone as shown in the cross-sectional view of Figure 5. Furthermore, even if family members urinate on the portable toilet sheet multiple times, the color changes indicate the limit of its absorbency, ensuring safe use. Even with children's urine volume, there are no issues with absorbency even after several uses, ensuring a safe toilet environment. The combination of the absorbent sheet 11 and the absorbency-enhancing zones 14 and 15 makes disposal of the portable toilet sheet easy; simply remove the used sheet after use and discard it.
[0023] If the sheet cannot be replaced and the limit of the enhanced absorption zone is exceeded, the moisture will be dispersed up to the absorbent sheet 11 of the portable toilet sheet 10, but any urine that cannot be absorbed will remain in the enhanced absorption zone 14. Even if urine remains in the enhanced absorption zone 14, the portable toilet sheet is covered with a waterproof film 17, so it will not seep out from the bottom surface 18 of the portable toilet sheet.
[0024] In Figure 3, when using the portable toilet sheet 10 in a home toilet or other Western-style flush toilet, it is important to prevent the bottom of the portable toilet sheet 10 from getting wet with the water inside the flush toilet. To achieve this, a garbage bag, commonly found in households, is first placed in the flush toilet, and the opening of the garbage bag is held down by the toilet seat. The portable toilet sheet 10 is then placed inside the garbage bag in the toilet bowl, and the non-woven fabric toilet seat 12 covers and wraps around the toilet seat. At this time, the elastic member 13 stretches, fixing the toilet seat and the non-woven fabric toilet seat cover of the portable toilet sheet in place, thus ensuring cleanliness and providing infection control. When using a temporary toilet box made of cardboard or similar material, there is no need to worry about contact with standing water. However, since there is likely no toilet seat like in a flush toilet, a simple toilet sheet is spread out on the nonwoven fabric 12 and the temporary toilet box, and the top of the temporary toilet box is covered with the nonwoven fabric and secured with adhesive tape 19. This prevents the nonwoven fabric toilet seat cover from slipping down and thus functions as an infection prevention measure.
[0025] In times of disaster or emergency, it is especially important to minimize the odor of excrement when disposing of waste after using a portable toilet sheet. The absorbency-enhanced zones 14 and 15 inside the portable toilet sheet 10 of this invention are areas where excrement tends to concentrate. By increasing the amount of superabsorbent polymer and adjusting the content of citric acid and activated carbon, it is possible to suppress ammonia odor and fecal odor.
[0026] In the event of a natural disaster or other emergencies, such as a collapsed building, finding a toilet can be extremely difficult. Human excretion becomes increasingly difficult to control over time. Once the limit is reached, it becomes uncontrollable, potentially soiling clothing and making it impossible to change, leading to both physical discomfort and significant psychological distress. The portable toilet sheet 10 of this invention easily solves the problem of finding a place to relieve oneself and the subsequent cleanup for disaster victims. It is especially reassuring for patients and the elderly who already have toilet-related issues. Being forced to endure the urge to defecate is unbearable, and it is desirable to have a portable, compact excretion disposal kit prepared in advance to be ready for unexpected emergencies. When actually using the portable toilet sheet 10, after use, you can dispose of it by sealing the waste odor in a resealable bag with an odor-blocking function. You can also keep the portable toilet sheet 10, compact toilet paper, and alcohol wipes together as a set. If the installation of portable toilets is delayed during a disaster, people may have to relieve themselves outdoors using a traditional Japanese-style toilet. However, after use, the portable toilet sheet can be rolled up into a small size and placed in the provided resealable bag, allowing for hygienic disposal while containing the odor of the waste. It is desirable to prepare and stockpile a compact waste disposal kit in preparation for a major disaster.
[0027] In the event of a disaster, where resources are scarce, the present invention is not limited to the embodiments exemplified above, and can be modified as appropriate without departing from the spirit of the present invention.
[0028] Although designed for disaster relief, it can be used for a variety of purposes, not only for waste disposal in cars during traffic jams or while camping, but also for handling fish in the kitchen or disposing of food waste that releases moisture. Furthermore, by changing the size, the absorbent sheet of this invention can be used as an etiquette bag for airsickness on airplanes or boats, and it is easy to dispose of. The Portable Toilet Sheet 10 comes in a compact, single-use pack, and families are eager to stock up on it so that each family member can use it interchangeably. Disposable portable toilet sheets 10 make it easy to clean up excrement and vomit containing viruses such as norovirus, E. coli O157, and rotavirus, which are difficult to handle, thus helping to prevent infection. In addition, distributing portable toilet sheets in public places such as train stations and airports can provide peace of mind in case of sudden toilet problems. During disasters, if it takes several hours to several days for portable toilets to be set up due to infrastructure concerns, then defecation outdoors becomes unavoidable. The portable toilet sheet 10 of this invention is especially necessary, and we hope that the government and other organizations will distribute it to prevent unsanitary conditions during earthquakes and other disasters. [Explanation of Symbols]
[0029] 10 Portable toilet sheets 11 Absorbent Sheets 12 Nonwoven fabric 13 Elastic members 14. Enhanced absorption zone (bottom surface) 15. Enhanced absorption zone (side section) 17 Waterproof film 18 Bottom part 19 Adhesive tape 20 toilet seats 21 Box-shaped temporary toilet 22 Opening
Claims
1. A portable toilet seat comprising an absorbent section formed by creating an absorbent sheet containing an absorbent agent in the shape of a bag with an opening, and an outer edge section made of nonwoven fabric that covers the entire toilet seat continuously from the opening.
2. The simple toilet sheet according to claim 1, further comprising absorption-enhancing zones with increased absorbent content on the front, rear, and bottom surfaces of the absorbent section.
3. The simple toilet sheet according to claim 2, wherein the absorbency-enhancing zone is colored differently from the other parts of the absorbent section.
4. The simple toilet seat according to claim 1, further comprising an anti-slip material made of an elastic material to prevent the outer edge from sliding off the toilet seat.
5. The simple toilet seat according to claim 4, wherein adhesive tape is provided on the part where the outer edge contacts the toilet seat so that the outer edge does not slip off the toilet seat.
6. A portable toilet seat according to any one of claims 1 to 5, which is installed on the upper flat surface of a box-shaped temporary toilet.
Citation Information
Patent Citations
Portable toilet
JP2020043889A
Box type simple toilet capable of being folded in tabular shape
JP2022158786A