JP5364421B2 - Great specific gravity prevention bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flood prevention bag with a large specific gravity which can be inflated in a few minutes how it is handled by anybody, and particularly which is effective for a measure against flood since it can resist a water force expected when a waterproof dike is constructed. <P>SOLUTION: In this flood prevention bag, a weighting body formed of a large specific gravity substance with a specific gravity larger than that of water and a high water-absorbing polymer are disposed independently in the flood prevention bag body having a bag-like structure. The flood prevention bag body is inflated to a flat rectangular parallelepiped shape by absorbing water by the high water-absorbing polymer. The flood prevention bag includes a water soluble paper bag 11 which is formed of water soluble paper and which comprises one chamber having a bag-like structure. The water soluble paper bag is filled with the high water-absorbing polymer 14, and disposed in the longitudinal direction of the flood prevention bag body. The lower surface of the bag which constitutes the water soluble paper bag is fixed to the upper surface of the weighting body 15 in use. When absorbing water, the generally entire upper and lower surfaces of water is brought into contact with water. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  In the present invention, a weight body made of a high specific gravity substance having a specific gravity greater than that of water and a superabsorbent polymer (superabsorbent resin) are individually arranged in the interior of the bag body having a bag-like structure. The present invention relates to a large specific gravity proof bag characterized in that the proof bag body is inflated into a flat rectangular parallelepiped shape by absorbing water of a water-absorbing polymer, and particularly exhibits a high protection function against flooding.

  Various structures have been used in the past to stop the prevailing external force applied from the outside. The contents of the prevailing external force vary, but sandbags have been used in particular in order to stop floods. However, in order to make sandbags, earth and sand are required, and in urban areas where there is no available earth and sand nearby, it is necessary to take measures without using earth and sand. In contrast, Japanese Patent Laid-Open No. 2001-355219 discloses a bag-like material called a portable laying body as a blocking body having a function that can replace a conventional sandbag. The same number has a configuration in which a sheet-like material made of cellulose sponge containing carbide is arranged on both sides of a sheet material holding a liquid absorbent polymer, and the sheet material holding the liquid absorbent polymer Since both surfaces are covered with a sheet-like material, it takes time for the liquid to reach the entire liquid-absorbing polymer, and there is a concern that it is not suitable for rapid work.

  Utility Model Registration No. 3072865 discloses a water bladder in which the swellable material in the sac is not exposed to the outside of the sac regardless of before or after the water supply, and does not accumulate in the corners of the sac. Therefore, a bag body made of a water-soluble material is fixed inside an inner bag made of fine woven or non-woven fabric, and a swellable material is accommodated inside the bag body. In this water sac structure, a connecting bag consisting of several bags filled with a swellable material is fixed inside the inner bag by fixing means at both ends, and water is supplied to the connecting bag consisting of several bags for that purpose. Water to be penetrated into the swellable material from the side surface of the connecting bag, and it takes a considerable time until the water reaches the entire swellable material and becomes sufficiently swollen. It seems to be necessary.

When this type of protective bag, called a sandbag or waterbag, is constructed using a water-absorbing polymer as described above, how quickly it can be inflated and used becomes a very important issue. Become. This is because it would be useless to lag behind when a disaster was imminent and struggling to protect it. Therefore, the problem is how quickly the water-absorbing polymer and the like can be expanded, but no technical proposal has yet been made to deal with this problem. In addition, since this kind uses water, the whole specific gravity has the property that it is not different from water. Since it has a specific gravity equivalent to that of water, it will be in a state where it will float easily due to the prevailing water force, and it will have a fatal defect that the function as a waterproof embankment will be insufficient. Therefore, in order to use a water sac using a water-absorbing polymer for a flood control application, a countermeasure against floating by adding an appropriate weight is also necessary.

  In addition, the form of the protective bag which swelled by expansion | swelling of the superabsorbent polymer (superabsorbent resin) also becomes a problem. That is, when the center of the expanded protective bag swells like a convex lens and gradually becomes thinner toward the periphery, the thickness of the bag is not uniform. A gap is formed at the end of the insufficient bag, for example, a water flow is allowed to pass therethrough. Therefore, if the end portions are not overlapped, it is useless and the usage amount of the bag increases. Therefore, when stacking bags having a shape in which the center is inflated in multiple stages, the working efficiency is not good, and the bag tends to become unstable, leaving anxiety as a waterproof levee and a protective wall.

JP 2001-355219 A Utility model registration No. 3072865

  The present invention has been made paying attention to the above points, and the problem is that no matter who handles it, it will swell in a few minutes, especially against the water force expected when building a waterproof embankment. It is possible to provide a large specific gravity prevention bag effective as a flood countermeasure. Another object of the present invention is to provide a large specific gravity proof bag that is easy to handle and is highly effective for water protection and protection. In the present invention, “proofing” is used as a word to prevent and protect things from flooding.

In order to solve the above-mentioned problems, the present invention individually arranges a weighted body made of a large specific gravity material having a specific gravity larger than water and a superabsorbent polymer inside the bag body having a bag-like structure, A water-proof bag in which the water-proof bag body is inflated into a flat rectangular parallelepiped shape by water absorption of the high water-absorbing polymer. The water-proof paper bag is made of water-soluble paper and has a single chamber having a bag-like structure. The above-mentioned water-soluble paper bag is placed in the longitudinal direction of the anti-proof bag body and fixed to the upper surface when the weight body is used on the lower surface side of the upper and lower surfaces of the bag constituting the water-soluble paper bag. The water-soluble paper bag is constructed so that it can be contacted with water on almost the entire upper and lower sides when water is absorbed.

  The large specific gravity-proof bag according to the present invention expands a superabsorbent polymer (superabsorbent resin) in the form of a gel (gel) by absorbing water of the superabsorbent polymer disposed inside the component having a bag-like structure. The shape of the flat rectangular parallelepiped shape is maintained by the expansion pressure. A highly water-absorbing polymer is a cross-linked product of a hydrophilic linear polymer or branched polymer. When a certain amount of water is absorbed, it becomes a swollen hydrogel, which is difficult to release even under pressure, and the water absorption is 1 gram of polymer. Although what is referred to as 10 grams or more per unit, some of those usable in the present invention have a water absorption amount of 400 grams or more per gram of polymer. Examples of superabsorbent polymers include starch / polyacrylic acid graft-based, cross-linked polyacrylate-based, polyvinyl alcohol-based, vinyl acetate-acrylate-based, and sodium polyacrylate (PSA) -based polymers. One that is insoluble in water but absorbs water and expands is, for example, a crosslinked polyacrylate-based powder.

  These super absorbent polymers show the best expansion performance when using fresh water. Water other than fresh water, such as seawater, can be used. When seawater is used, the cross-linked polyacrylic acid metal salt is used at a concentration of 90 percent or more, more preferably at a concentration of 92 to 94 percent. It is desirable. Superabsorbent polymers have been used for soil hygiene or horticultural applications such as sanitary materials such as disposable diapers, but can be used in the present invention. The same superabsorbent polymer may be used.

  In order to place the superabsorbent polymer in the bag, in the present invention, the superabsorbent polymer is filled in a water-soluble paper bag made of a water-soluble resin called water-soluble paper. The water-soluble paper bag has a bag-like structure with one chamber, and the water-absorbent paper bag chamber is filled with a superabsorbent polymer. That is, the water-soluble paper bag according to the present invention is a single body composed entirely of a single chamber, and as a result, in the space inside the proof bag main body, as shown in FIG. Can be formed as a water-absorbing polymer filling chamber. On the other hand, in the conventional configuration, the two chambers are separated and connected to the side of the weighted body, so that it is necessary to use a bag having only the lengths 11 and 12 from the fixed part to both ends, and the surface area of the bag is small. The superabsorbent polymer cannot be sufficiently brought into contact with water.

  However, according to the above configuration of the present invention, the length of one chamber can be approximately doubled compared to the conventional one, and the surface area of each chamber is doubled. The surface area of the highly water-absorbing polymer that can contact water (hereinafter referred to as the water contact area) is also doubled, and the initial water absorption rate can be significantly improved. That is, the water contact area of the superabsorbent polymer is increased by one chamber, the water supply efficiency is improved, and thus rapid expansion is realized and the apparatus can be used. One chamber configuration can also increase the amount of the superabsorbent polymer, but this is not the original purpose, and the initial water-absorbing speed is improved by increasing the water contact area for the superabsorbent polymer until it gets tired. The purpose is to increase efficiency. The water-soluble paper bag of the present invention consisting of one chamber is arranged in the longitudinal direction of the bag body, and the upper surface of the upper and lower surfaces of the bag constituting the water-soluble paper bag is partially or at one location on the upper surface when the weight body is used. The water-soluble paper bag can be contacted with water on almost the entire upper and lower sides thereof when absorbing water. The structure in which the water-soluble paper bag is not fixed to the other on the upper surface side is preferable in the sense that it does not hinder the movement of the water-soluble paper bag when inflated. However, if the water-proof paper bag is inflated first, or at the same time, when the water-soluble paper bag is inflated, the water-resistant paper bag is also inflated by or along with the expansion of the water-proof paper bag. Can be fixed. In addition, since the water-conducting hole is opened in the proof bag body, it is clear that the air inside is pushed up by the water entered from here and tends to swell first.

  A water-soluble paper bag made of water-soluble paper is a simple container having a sachet or small box shape formed using a water-soluble resin known by the name of water-soluble paper, and has a configuration in which a superabsorbent polymer is filled therein. take. A water-soluble paper bag such as a small bag or small box filled with a superabsorbent polymer is placed in the longitudinal direction of the main body of the anti-proof bag, and the weighted body is used on the lower surface side of the upper and lower surfaces of the bag constituting the water-soluble paper bag. Fix to the top surface. By fixing the water-soluble paper bag on the lower surface side of the upper and lower surfaces of the bag, almost the entire portion other than the fixing portion, that is, almost the entire water-soluble paper bag can be inflated so as to float freely. The water-soluble paper bag composed of two chambers is placed in contact with water on almost the entire upper and lower sides thereof, and as shown in FIG. 2, the water-soluble paper bag swells simultaneously with water absorption. That is, the structure fixed on the lower surface side is a means for efficiently bringing the superabsorbent polymer whose water contact area is increased by the one chamber structure described above into a state in which water contact can be made efficiently. Therefore, it is possible to adopt a structure in which the above mechanism for inflating the water-soluble paper bag is supported, or at least when the inflating mechanism is not hindered, the upper surface side of the bag is fixed to another.

  Water-soluble paper bags, such as sachets or caskets, filled with a superabsorbent polymer, in the components of the proof bag body, in the position of the upper surface when using a weighted body to obtain good water absorption, for example, hot melt It is fixed by a bonding means such as a mold adhesive or heat seal, and is arranged at a predetermined position. Since the water-soluble paper bag material is a water-soluble resin, the water-soluble paper bag is dissolved by the supplied water and does not hinder the expansion of the superabsorbent polymer. It is desired to decompose within several tens of seconds after the start, more preferably within several seconds to several tens of seconds.

  And in this invention, the weight body filled with the large specific gravity substance whose specific gravity is larger than water is arrange | positioned inside the constituent material of a proof bag main body. This weight body prevents the sag bag according to the present invention from becoming easily floating due to water, so the specific gravity should be greater than 1. However, it is not just that the specific gravity exceeds 1, but conditions such as harmlessness and low cost are required because of the nature of the bag. It is even better if it can be collected as resource waste after use. Moreover, the larger specific gravity is more effective because it faces the water. However, under conditions of use that do not require consideration of the relationship with water, such as the water flow, it is necessary to consider the possibility of movement after expansion and the effect of the load of the proof bag on the structure. In some cases, lightness takes precedence over being too heavy. Accordingly, a heavy or light weight type is prepared within the scope of the configuration of the present invention, and is properly used depending on the situation.

  From such a point of view, when applying the thing of the present invention to a floodproof or waterproof levee, the specific gravity of the entire proof bag in the use state in which the superabsorbent polymer arranged inside the constituent material is expanded, It is desirable to set it to be 1.2 or more. It is because it is judged by experiment that if the specific gravity is less than 1.2, it cannot be expected to sufficiently achieve the objective of facing the water. Various use situations can be considered for the upper limit, but it is desirable that the specific gravity not exceed 2.0 in consideration of transportation.

  And about a large specific gravity substance, it is desired that specific gravity is larger than about 3. The biggest reason is that when the specific gravity is considerably smaller than 3, the efficiency as a weight is not good. As will be described later, when the volume after expansion of the anti-proof bag is about 20 to 25 liters, it is most desirable that the specific gravity mainly composed of iron oxide is made of a substance having a specific gravity of about 3.3. . When these conditions are applied to an actual bag, the total weight of one bag is 24 kg at a specific gravity of 1.2 and a specific gravity of 2.0. 40 kilograms.

  The constituent material of the main body of the proof bag includes a minimum of one layer, three layers of an innermost layer, an intermediate layer, and an outermost layer. As a means for maintaining a certain flat shape of the constituent material, a bag that is formed into a sheet when folded is used, and a bag having a gusset portion located between two flat front and back surfaces is used. By the gusset portion, it is possible to form a flat solid having front and rear, left and right side surfaces having a sufficient thickness surrounding the front and back surfaces. This form does not take up space before use, and when expanded, the ridge also becomes a flat cuboid shape like a cut ridge, so it can be said to be the most ideal. The gusset portion is provided on the component material when the main body of the bag is composed of only one component, but when it is composed of a plurality of components, it is the strongest, eg, kraft paper What is necessary is just to provide in one of them among components.

  The form in which the constituent material of the above-described anti-proof bag main body forms a plurality of layers inside and outside has favorable effects in various fields such as strength improvement and ease of stacking. Among them, the innermost layer is made of knitted fabric using resin fibers, the outside is covered with a component made of water-resistant kraft paper, and the outside is a hemp bag or an exterior with almost the same strength and friction A multilayer structure having a structure covered with a body is a desirable example for water protection. The structural strength can be increased by covering the outer surface of the proof bag main body with an exterior body, and the structure of the knitted fabric structure prevents slippage in the usage method of stacking the proof bag. Synthetic resin bags that do not have the characteristics of natural hemp bags can also be used. In that case, resin can be applied to the flat front and back surfaces of the anti-proof bag, and the strength improvement effect and anti-slip effect can be achieved. By giving it, it is made to have anti-slip properties like a knitted fabric structure.

  In the present invention, when a layered structure including a plurality of water-resistant kraft papers is applied as the constituent material, a large number of water conduction holes are formed on the entire flat front and back surfaces. Kraft paper is tough and flexible as paper, and is more preferable as a spill bag by providing water resistance. Further, in the case where the constituent material of the proof bag main body includes a sheet material knitted using synthetic resin fibers, the knitted structure constitutes another means for improving the water absorption efficiency. Since the sheet material has a woven structure, moisture can easily enter and good supply properties can be maintained, and leakage of the superabsorbent polymer can be prevented after expansion.

  It is desirable that the weighted body is configured to form a container having an elongated shape in the direction of the short side of the rectangle of the constituent material and to fill the container (see FIG. 1). By arranging the container of such a form laterally at the substantially central part of the constituent material of the bag body having a bag-like structure, the constituent agent is pressed by the load at the central part. When thrown into the water stored in a bag or the like, both ends are lifted by buoyancy as shown in FIG. 6B. As a result, the center part swells and the gusset part is opened, and a space is formed inside the component material. Can be improved.

  When the bulging bag is inflated by water absorption, it becomes a flat rectangular parallelepiped shape having a sufficient thickness, for example, 10-20 centimeters or more, and can be stacked stably and formed flat. Therefore, it is convenient from the viewpoint of storage and transportation. In addition, it is understood that the water introduction hole formed in the constituent material including a plurality of water-resistant kraft papers serves as a pressure escape path inside the expanded superabsorbent polymer.

  Several methods can be taken to place the water-soluble paper bag filled with the superabsorbent polymer in the proof bag. The simplest method is to directly bond the water-soluble paper bag to the inner surface of the constituent material of the anti-proof bag body having the innermost woven fabric structure. Further, a frame body that houses the water-soluble paper bag may be bonded to the inner surface of the innermost constituent member, and the water-soluble paper bag may be fixed to the frame body. In that case, the frame keeps enough space around the water-filled paper bag filled with the superabsorbent polymer, draws the supplied moisture into the space, and permeates the superabsorbent polymer with moisture. Make it easier. In the case of the present invention, since the weighted body can play a role of securing a space around the weighted body by arranging the weighted body inside the constituent material, it is possible to save the trouble of fixing using the frame body.

  It is desirable to use a woven fabric having a woven structure made of synthetic fiber to form reinforcing means for increasing the strength of the anti-proof bag, and to cover the inner surface of the anti-proof bag using the reinforcing means. Being a woven fabric is a desired structure for allowing moisture to penetrate into the interior, and at the same time satisfies the condition of a tough structure. The reinforcing means is not limited to one layer. For example, when the main body of the bag is a three-layer structure, it can be appropriately set according to the intended strength, for example, one layer between each layer in total. it can.

  Reinforcing means include those laminated on the surface of kraft paper and tubes that are independent of kraft paper. The reinforcing means is intended to be capable of taking two different forms, one that is laminated and integrated on the surface of the proof bag main body and another that is independent from the water-resistant kraft paper. What is laminated and integrated on the surface of the main body of the proof bag does not need to be tubular because it has a cylindrical structure at the time of bag making, but an independent separate body must have a tubular structure.

  Since the present invention is constructed and operates as described above, even if anyone handles it, it will swell in a few minutes, and in order to resist floods, even against the water force expected when constructing a waterproof levee An effective large specific gravity prevention bag can be provided. In addition, according to the present invention, it is possible to provide a large specific gravity-proof bag that is easy to handle and highly effective for water protection and protection. In particular, the superabsorbent polymer is filled in one chamber of the water-soluble paper bag, and the water-soluble paper bag is fixed to the upper surface when the weighted body is used on the lower surface side of the water-soluble paper bag. It is carried out very quickly and on average, and when a waterproof levee is constructed, it can quickly counter the expected water flow, so that it has the effect of being able to obtain stable waterproofing performance. In addition, according to the present invention, when the proof bag is inflated, the flat shape of the substantially rectangular parallelepiped shape is maintained. Therefore, when the front and back surfaces of the proof bag are pressed and stacked, the side surfaces of the end portions are in close contact with each other, and a gap is generated. It is possible to build a waterproof levee that is very effective as a flood control. In addition, since sandbags and water sacs need to be heavy, there is a common sense that the burden on transportation labor is large, whereas the present invention expands immediately before use at or near the site. Therefore, contrary to common sense, there is an advantage that the labor of transportation is not required or is remarkably reduced.

  Hereinafter, the present invention will be described in more detail with reference to illustrated embodiments. FIG. 1 shows an example of a large specific gravity proof bag 10 according to the present invention, in which a superabsorbent polymer is filled in a water-soluble paper bag 11 in the form of a powder. The water-soluble paper bag 11 is used to hold the powdery superabsorbent polymer in the form of a water-soluble paper sachet until use, and when water is supplied, the water-absorbing polymer absorbs water and dissolves. It is made as a bag so that the expansion proceeds.

  The water-soluble paper bag 11 is made of water-soluble paper and has a single chamber structure composed of one chamber having a bag-like structure. The illustrated water-soluble paper bag 11 has a limited overall length L as shown in FIG. It has an equal length and is set to an elongated rectangular bag-like structure so as to be arranged in the longitudinal direction of the protective bag body. Therefore, one chamber of the water-soluble paper bag 11 has a length approximately twice as long as the lengths l1 and l2 from the fixed portion of the bag in the conventional form to both ends, and the water contact area almost doubles. Note that the amount of the superabsorbent polymer filled in the interior is approximately the same as the conventional amount.

  The superabsorbent polymer filled in the water-soluble paper bag 11 is made of, for example, a powder containing 92% cross-linked polyacrylate, and has a property of rapidly expanding when water is supplied and dissolved in the water-soluble paper. doing. The superabsorbent polymer 14 is filled with a plurality of water-soluble paper bags 11 in an appropriate amount, and the water-soluble paper bag 11 is used when the weight body 15 disposed in the innermost component 12 of the proof bag main body is used. Adhesion using a hot-melt adhesive is fixed to the upper surface by a fixing portion 13 on the lower surface side of the water-soluble paper bag as a fixing means. As shown in FIG. 4, the fixing portion 13 is set on the upper surface of the weight body 15 at the substantially central portion of the water-soluble paper bag 11 that is elongated in the longitudinal direction of the anti-proof bag body. It is in a state where it can move freely beyond the weight body 15 from end to end inside.

  Thus, the water-soluble paper bag 11 is arranged in a direction perpendicular to the longitudinal direction of the weight body 15 and in a direction parallel to the longitudinal direction of the anti-proof bag body. Without being fixed, the one chamber 11 is configured to be able to come into contact with water on almost the entire upper and lower sides when absorbing water. Under such an arrangement, a gap g is formed around the water-soluble paper bag 11 and the weight body 15 as shown in FIG.

  The illustrated large specific gravity proof bag 10 has a volume after expansion of about 20 to 25 liters. In this case, the proof bag 10 according to the present invention is likely to float due to water. As the weight body 15 to be prevented, a powdered iron oxide powder 16 having a specific gravity greater than 1 is filled in a resin bag-like container (water-insoluble). The specific gravity of this iron oxide powder is about 3.3, and the weight of the entire proof bag is about 26 to 32.5 kilograms, which satisfies the condition that it is effective for facing water and the like. Furthermore, since the product produced in the production process of iron products is used, it satisfies the conditions that it is inexpensive, harmless, and can be recovered as resource waste after use. It is suitable for.

  The weight body 15 is filled in a bag-like container having an elongated shape, and the longitudinal direction thereof is matched with the direction (width direction) of the short side of the rectangle of the constituent material 12 of the anti-proof bag body. In other words, the container-containing weight body 15 having the above-described configuration is disposed laterally at the center of the constituent material 12 and is fixed to the upper surface of the inner surface only by means such as adhesion at the fixing portion 13. The fixing position is good at the center so that the component 12 is divided into approximately two parts.

  The illustrated large specific gravity proof bag 10 has a structure in which the constituent material of the main body of the proof bag forms a plurality of layers inside and outside, and the constituent material 12 of the innermost layer has a structure knitted using resin fibers (see FIG. 1, FIG. 4 and FIG. 5). The resin sheet knitted with the illustrated resin fibers, that is, the resin sheet is made of polyethylene cloth (PEC) using polyethylene fibers, exhibits water permeability and absorbs water to form a gel (gel) in an expanded state. Prevent leakage of superabsorbent polymer made of acrylate. In the example of FIG. 1, the constituent material 12 is illustrated as the innermost layer among the constituent materials constituting the inner and outer layers, but the constituent material 12 alone also constitutes the large specific gravity prevention bag 10 according to the present invention. It is possible.

  The constituent material of the illustrated large specific gravity proof bag 10 is composed of constituent materials 17 and 25 having a plurality of layers inside and outside, as will be further described below. As described above, the innermost layer 12 is made of a woven fabric using resin fibers, the outside is covered with a component 17 made of water-resistant kraft paper, and the outermost is a hemp bag or a strength almost equivalent to it. And a structure covered with an outermost constituent material 25 made of an exterior body having friction. Here, the bag structure of the constituent material 17 of the intermediate layer has the gusseted portion 22 of the folded structure, and the constituent material 12 of the innermost layer and the constituent material 25 of the outermost layer form a thickness corresponding to the gusseted portion 22. Since it has a space of possible dimensions, the expansion bag body is formed into a flat rectangular parallelepiped shape by expansion.

  In the structure of inner and outer layers, the intermediate layer component 17 is made of water-resistant kraft paper and has a size corresponding to the required amount of superabsorbent polymer, and in the illustrated case, 20 kilograms having a layered structure. It is for. Moreover, the constituent material 17 of the intermediate layer made of the water-resistant kraft paper illustrated has a reinforcing means in which a woven fabric 18 made of polyethylene fiber is laminated on the surface (inner surface) (see FIG. 5). The above-mentioned woven fabric 18 is formed through a cylinder-making and bag-making process using a constituent material 17 of an intermediate layer of water-resistant kraft paper, which is laminated by, for example, heat welding. The material of the woven fabric 18 is not limited to polyethylene, but other materials such as polypropylene can be used. However, it is necessary to have a knitted structure in order to ensure water permeability and increase the strength of the entire bag. In addition, a knitted structure is advantageous because even if a pile is driven in to make a hole in order to fix the stacked large specific gravity prevention bags, the hole tends to be closed.

  Another reinforcing means is a woven tube 19 that is independent of the intermediate layer component 17 (see FIG. 5). The woven tube 19 is disposed in the innermost layer of the water-resistant kraft paper bag. Therefore, the portion constituting the constituent material 12 of the innermost layer described above also has a reinforcing function. The woven tube 19 has a tubular structure (tubular structure), and the openings at both ends of the tubular structure are closed by the sealing band 21 in the bag making process. In addition, the water-soluble paper bag 11 in the form of a small bag is fixed to the constituent material 12 of the innermost layer before the large specific gravity prevention bag 10 is closed by the sealing band 21. As the fiber material of the knitted fabric tube 19, polypropylene cloth and other materials such as polyethylene cloth (PEC) can be used in the same manner as the woven fabric 18. Whereas the planar form enhances the unity with the intermediate layer constituting material 17, the fiber material of the woven tube 19 is formed thicker.

  A large number of water guide holes 20 for supplying moisture to the superabsorbent polymer are formed in almost the entire intermediate layer constituting material 17 having the above-described configuration. The water guide holes 20 are provided almost on the entire front and back surfaces so that moisture can be supplied quickly from almost all directions to the water-soluble paper bag 11 of the water-soluble paper bag placement portion fixed to the innermost layer constituent material 12. It is formed with an even distribution. However, although the water guide hole 20 may be provided on the gusset portion side, a non-hole portion 23 that does not open the water guide hole 20 is set at both ends close to the sealing band 21. The non-hole part 23 is provided so as to surround the water guide hole 20 in a frame shape, and fulfills the function of directing or limiting the pressure escape field inside the superabsorbent polymer together with the water guide hole 20 on both the front and back surfaces.

  Furthermore, for example, a hemp bag is combined with the large specific gravity prevention bag 10 as a constituent material 25 of the outermost layer. The outermost layer component 25 has a size and a shape that can cover the whole of the bag, and has a bag structure in which two or three sides are closed except for the end portion. The large specific gravity proof bag 10 from the opening 26 to the innermost layer constituent material 12 and the intermediate layer constituent material 17 is housed inside. The outermost layer component 25 is intended for strength improvement means and anti-slip means, and in addition, a foamable resin is applied to the essential part of the flat portion of the anti-proof bag, or a rubber band is hung on the anti-proof bag. It is also possible to take a method. When hemp bags are used as the outermost layer constituent material 25, the large specific gravity prevention bag 10 up to the innermost layer constituent material 12 and the intermediate layer constituent material 17 is housed inside, and then the end opening 26 is formed with a thread, string, wire, etc. Alternatively, it is desirable to place it completely closed by appropriate means such as staples.

  Next, the usage method and effect of the large specific gravity proof bag 10 of the present invention configured as described above will be described. First, the large specific gravity prevention bag 10 of the present invention is immersed in a tank filled with water so that the side to which the weight body 15 is fixed is down and the side to which the water-soluble paper bag 11 is fixed is up (FIG. 6A). Since the large specific gravity proof bag 10 is pressed by the weight body 15 at the lower part of the central part, both end parts are lifted by buoyancy, and the central part is also inflated accordingly, so that the gusset part 22 opens, and the inside of the proof bag 10 A space is formed (FIG. 6B). For this reason, water easily enters the space inside the proof bag, and as a result, the upper surface side of one unfixed chamber is lifted by receiving buoyancy, except for the fixing portion 13 on the lower surface side (FIG. 6B). As shown with reference numeral 11 'in FIG. 2, the entire upper and lower surfaces of the chamber come into contact with water. Thus, the superabsorbent polymer 14 filled in the inside can come into contact with water in the double water contact area, and the initial water absorption rate can be remarkably improved. Therefore, an increase in the water contact area of the superabsorbent polymer 14 and an improvement in the water supply efficiency are achieved by one chamber, and the water is spread quickly and sufficiently, and the expansion action progresses very quickly. 10 is formed (FIG. 6C).

In this way, by supplying water to the superabsorbent polymer 14, the expansion was completed in about 5 minutes, and a proof bag 10 having a height of about a dozen centimeters and a total weight of about 26 to 27 kilograms was obtained. In addition, below, the water absorption effect of this invention and a prior art example (having the length of l1 and l2 shown in FIG. 3) is compared and shown.
The present invention water absorption Example 1 Example 2 Example 3 Average elapsed time (3 minutes) 16.3 kg 16.1 kg 16.5 kg 16.3 kg
〃 (5 minutes) 19.7 kg 19.8 kg 19.5 kg 19.7 kg
Conventional water absorption Example 1 Example 2 Example 3 Average elapsed time (3 minutes) 12.7 kg 12.5 kg 12.9 kg 12.7 kg
〃 (5 minutes) 17.9 kg 17.7 kg 18.1 kg 17.9 kg

  The above experimental result is a numerical value obtained by measuring how many kilograms of the large specific gravity protection bag 10 has reached with a target of 20 kilograms, and the amount of water supply at the time of 3 minutes indicating the initial water absorption speed is an average. It can be seen that the value is about 28% improvement because the value is 12.7 kg of the conventional example compared to 16.3 kg of the present invention. The first requirement for disaster prevention measures is the initial water absorption speed, and the faster the initial water absorption speed, the quicker the response is possible. It is understood that the present invention can sufficiently meet this requirement. In the above example, when it expands most, it becomes about 20 kilograms. However, the reason why 20 kilograms are absorbed is to leave as a margin to absorb rain after installation as a waterproof levee. This is a desirable usage for flood control applications.

  7 shows the appearance of the inflated large specific gravity proof bag 10 of the present invention comprising the innermost layer constituting material 12 and the intermediate layer constituting material 17, and FIG. 8 shows the large specific gravity proof bag 10 in FIG. 2 as the outermost layer constituting material. 25 shows the appearance of the large specific gravity proof bag 10 covered with 25. The inflated anti-proof bag 10 of the present invention has a flat rectangular parallelepiped shape like a chopped scissors, but forms a thick rectangular parallelepiped. FIG. 9 shows a part of a waterproof embankment constructed by stacking the expanded large specific gravity proof bags 10 of the present invention in three stages up and down. About 300 liters stored in a tank from a distance of 1 meter was discharged on this waterproof levee, and experimented on tolerance to water flow and water repellency. It was judged that the purpose of the period could be achieved. FIG. 10 shows an example in which the large specific gravity proof bags 10 are stacked on the base B in different vertical and horizontal directions, and is suitable for constructing a waterproof levee by stacking the large specific gravity proof bags 10 in an orderly manner on uneven terrain. Yes.

  As described above, it has been proved that the large specific gravity-proof bag 10 of the present invention can sufficiently withstand water-proof applications. In particular, since the bulging bag 10 is a flat and thick rectangular parallelepiped, it is easy to handle at the time of construction. The constructed waterproof levee is solid as a temporary structure and is very stable against external force. . Moreover, the anti-bag 10 has been confirmed to maintain the expected performance for almost 6 months in the state where the filled superabsorbent polymer has expanded, so that it is sufficiently possible to perform restoration work during that period. is there.

  The large specific gravity prevention bag according to the present invention can be used extensively, particularly as a measure against flooding in urban areas in urban disaster prevention, and as a means for preventing water from entering underground facilities such as subways. It can also be used as a waterproof embankment that protects houses and villages from flooding by dealing with river flooding. In particular, even in cities where it is difficult to obtain earth and sand, if water is available, it can be expanded and used as a water pouch.

It is a disassembled perspective view which fractures | ruptures and shows a part of one example of the large specific gravity prevention bag concerning this invention. It is a perspective view which shows the effect | action in the water-soluble paper bag arrange | positioned inside the large specific gravity prevention bag which concerns on this invention, and its expansion process. It is a top view of the thing of FIG. It is a principal part expanded sectional view of FIG. It is a partial expanded sectional view of the large specific gravity prevention bag of a non-expanded state. In explanatory drawing of an expanded state, A and B are explanatory drawings which show the water absorption and expansion | swelling process in the large specific gravity prevention bag of this invention, C is a side view of what expanded. It is a perspective view which shows what expanded the large specific gravity prevention bag of this invention. It is a perspective view of what further covered the thing of FIG. 7 with the exterior body. It is explanatory drawing which shows Example 1 of a stacked state. It is explanatory drawing which shows Example 2 similarly.

DESCRIPTION OF SYMBOLS 10 Large specific gravity prevention bag according to the present invention 11 Water-soluble paper bag 12 Constituent material of innermost layer 14 Super absorbent polymer (super absorbent polymer)
DESCRIPTION OF SYMBOLS 15 Weight body 16 Iron oxide powder 17 Constituent material of intermediate | middle layer 18 Woven cloth 19 Woven tube 20 Water conveyance hole 21 Sealing band 22 Machi part 23, 24 Non-porous part 25 Constituent material of outermost layer

Claims (4)

A heavyweight body made of a large specific gravity material having a specific gravity greater than that of water and a highly water-absorbing polymer are individually arranged inside the body of the bag with a bag-like structure, and the water-proof bag body is absorbed by the water absorption of the superabsorbent polymer. A spill bag that inflates into a flat rectangular parallelepiped shape,
The water-soluble paper bag is made of water-soluble paper and has a single chamber having a bag-like structure. The water-soluble paper bag is filled with a highly water-absorbing polymer, and the water-soluble paper bag is disposed in the longitudinal direction of the proof bag main body. The upper and lower surfaces of the bag constituting the water-soluble paper bag are fixed to the upper surface when the weight body is used, and the water-soluble paper bag is configured to be able to contact water on the upper and lower surfaces of the bag when absorbing water. Large specific gravity prevention bag characterized by.   The large specific gravity-proof bag according to claim 1, wherein the overall specific gravity is set to be 1.2 or more and 2.0 or less in a use state in which the superabsorbent polymer disposed inside the constituent material is expanded.   As a means for maintaining a certain flat form, the constituent material is a bag that is formed into a single sheet when folded, and has a gusset portion positioned between two flat front and back surfaces. The large specific gravity proof bag according to claim 1, wherein a flat solid body having front and rear, left and right side surfaces having sufficient thickness surrounding the front and back surfaces is formed. The component material is composed of a component material comprising a plurality of layers inside and outside, the innermost layer of which is composed of a material woven using resin fibers, and the exterior is covered with a component material composed of water-resistant kraft paper, and further 2. The large specific gravity proof bag according to claim 1, wherein the outer cover is covered with a hemp bag or an exterior body having substantially the same strength and friction.

Images