WO2007132536A1 - Large-gravity protective bag - Google Patents

Abstract

A large-gravity protective bag of easy handling that whoever handles the same, can be unfailingly expanded within a few minutes, and that can resist water power anticipated in case of construction of a floodbank, and that is highly effective in not only waterproof use but also bulletproof use. There is provided protective bag (10) adapted to by feeding water into the interior of a constituent material with baglike structure, swell a highly water-absorbing polymer disposed within the constituent material and to by the swelling pressure, maintain a flat configuration, wherein accommodation body (11) of a water-soluble resin is packed with highly water-absorbing polymer (14), and wherein the required amount thereof is divided in multiplicity and disposed within constituent material (12), and wherein weight body (15) packed with large-gravity substance (16) with a specific gravity larger than that of water is disposed within the constituent material (12). The constituent material (12) has a sheet material of resin fibers knit together.

Description

 Meiji book Large specific gravity protection bag Technical field

 The present invention relates to a high-density protective bag that inflates a superabsorbent polymer arranged inside a constituent material having a bag-like structure by supplying moisture and maintains a flat and constant form by the inflation pressure. It is. Background art

 Various structures have been used to stop the prevailing external forces applied from the outside. The contents of the prevailing external force vary, but for example, barricades are constructed using concrete, metal, earth and sand, wood, etc. for applications that block or prevent flying bullets and debris. In particular, when trying to combat terrorist activities, it was effective to build a barricade using sandbags in order to be resistant to firearm attacks. Sandbags have also been used 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 preventive measures that do not use earth and sand.

 On the other hand, the design of a sandbag for fouling, which is said to have the same strength as a sandbag filled with earth and sand and can be expected to have a sufficient fouling effect, is registered as a utility model No. 3 1 0 5 Proposed as No. 8 8 7, the idea is to enclose a powdery water-absorbing polymer in a flat bag, which has the advantage of having a small storage space for transportation and storage. It is supposed to have. Therefore, this is considered to be able to meet the above-mentioned demands in urban areas.

 However, since the device only describes that a water-absorbing polymer is enclosed in a bag and the bag is formed into a flat shape, the problem of how the bag formed into a flat shape swells. In other words, in this device, a water-absorbing polymer is sealed in an inner bag made of cotton and put in a hemp sack to make the whole flat, so that when it is full, the center of the eyelid swells most like a lens and moves toward the periphery. The bag gradually becomes thinner and the bag thickness is not uniform. This is also shown in Fig. 2 in the Gazette of the same draft, and when such inflated bags are stacked, a gap is created at the end of the bag with insufficient thickness, allowing the bullets to pass through without interruption. Cause fear of As a result, it is useless unless a considerable amount of bags are used. Therefore, work efficiency is not good, and when bags are stacked in multiple stages, the center of the bag swells easily, making it unstable and uneasy as a sandbag that actually entrusts life.

 In addition, the above idea describes that a fine cotton cloth is used for the inner bag as a countermeasure against leakage of the internal water-absorbing polymer. However, even if cotton fabric is left in contact with water for a long period of time, it is difficult to say that the strength will be maintained, so there is a problem of how much durability can be expected for fine cotton fabric. In particular, how much it can withstand when an external force is applied after building a protective wall is completely unknown.

This type of water uses water, so it is sometimes referred to as a water sacs compared to sandbags that use earth and sand. And it has come to be recognized that the water sacs have serious drawbacks in addition to morphological and structural dissatisfaction. This is due to the fact that the specific gravity of the whole is the same as water because water is used. Since it has the same specific gravity as 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 its function as a waterproof dike is insufficient. Therefore, conventional water tanks cannot be used for flood control, apart from bulletproof sandbags. The inventor conducted research on protective bags to improve these drawbacks, and developed the present invention. Disclosure of the invention

 The present invention has been made paying attention to the above points, and the problem is that it is easy to handle, can be expanded in a matter of minutes regardless of who is handling it, and is expected when a waterproof levee is constructed. The object is to provide a large specific gravity protective bag that is effective against water. Another object of the present invention is to provide a high specific gravity protective bag that is highly effective for both waterproofing and bulletproof purposes.

 In order to solve the above-described problems, the present invention expands a superabsorbent polymer disposed inside a constituent material by supplying moisture into the constituent material having a bag-like structure, and is flattened by an expansion pressure. As for the protective bag that maintains the form, the super absorbent polymer is filled in a container made of water-soluble resin, and the required amount is divided into a plurality of parts and placed inside the component material, and water. A weighted body filled with a large specific gravity material having a higher specific gravity than the above is disposed inside the component material, and the component material has a means to have a sheet material woven using resin fibers. .

 The large specific gravity protective bag according to the present invention expands the volume of the superabsorbent polymer as a gel by supplying moisture to the superabsorbent polymer disposed inside the constituent material having a bag-like structure. A certain flat shape is maintained by pressure. For example, a highly water-absorbing polymer is preferably a powder of a crosslinked polyacrylate, which absorbs water and expands. Examples of usable superabsorbent polymers other than the crosslinked polyacrylate include sodium polyacrylate (PSA) and starch / polyacrylic acid graft polymer.

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

 In order to place the superabsorbent polymer in the protective bag, in the present invention, the superabsorbent polymer is filled in a container made of a water-soluble resin. At that time, the required amount of superabsorbent polymer required for a pair of protective bags is divided into multiple pieces and placed inside the component. Dispersion and arrangement of superabsorbent polymers in multiple pieces makes it easier to come into contact with moisture compared to a single case, so that no matter who or how it is handled, water is reliably absorbed in the shortest time, and It expands evenly as a whole.

 A typical thing used as a container made of a water-soluble resin is, for example, a simple container such as a small bag or a small box formed using so-called water-soluble paper, in which a water-absorbing polymer is placed. Take the configuration to fill. A plurality of containers, such as sachets or caskets, filled with a highly water-absorbing polymer shall be placed in a good location in the protective bag component. Since the material of the container is a water-soluble resin, it is dissolved by the supplied water and does not hinder the expansion of the superabsorbent polymer. As performance necessary for the decomposition of the container made of the water-soluble resin, it is desirable to decompose within several tens of seconds after starting the water supply, 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 a structural material. Since the weight body prevents the protective bag according to the present invention from being easily floated by water, the specific gravity should be larger than 1 in principle. However, it is not just that the specific gravity exceeds 1, but the nature of the protective bag requires conditions such as being harmless and inexpensive. It is even better if it can be collected as resource waste after use. Also, specific gravity It is natural that the larger one is effective for facing the water, etc., but it is necessary to consider the possibility of movement after inflation and the impact of the load on the protective bag on the structure. There are some types that are lighter than heavy.

 From this point of view, in the present invention, it is desirable to set the specific gravity of the entire protective bag to be 1.2 or more in the use state in which the superabsorbent polymer arranged inside the constituent material is expanded. (Invention of Claim 2) This is because it is judged by experiments that if the specific gravity is less than 1.2, it cannot be expected to sufficiently achieve the objective of facing water. Since the upper limit can be used in various ways, it cannot be determined immediately, but it is desirable that the upper limit should not exceed 1.5.

 And for high specific gravity substances themselves, the specific gravity is expected to be larger than 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 of the protective bag after expansion is about 20 to 25 liters, it must be composed of a substance having a specific gravity mainly composed of iron oxide and about 3.3. Is most desirable (the invention according to claim 3). When these conditions are applied to an actual protective bag, if the volume after expansion of the protective bag is 20 liters, the total weight of one protective bag is 24 kg at a specific gravity of 1.2 and a specific gravity of 1. For 5, this is 30 kilograms. In the example described later, the specific gravity of iron oxide is about 3.3, the specific gravity of the entire protective bag is 1.3, and the total weight is about 26 kilograms.

 The protective bag components include a minimum of one layer and three layers of innermost layer, intermediate layer and outermost layer. As a means of maintaining a certain flat shape of the components, in the case of a bag that folds into a single sheet, a bag with a gusseted part located between two flat front and back surfaces shall be used. By this gusset portion, it is possible to form a flat solid having front and rear, left and right side surfaces with sufficient thickness surrounding the periphery of the two front and back surfaces (the invention according to claim 4). In this form, it takes up little space before use, and when it expands, the ridges become flat like chopped folds. The gusset part is provided on the component when the protective bag is composed of only one component, but when it is composed of multiple components as described later, for example, craft paper It may be installed in one of the strongest components.

 As described above, the configuration in which the component material has a plurality of layers inside and outside has favorable effects in various fields such as strength improvement and ease of stacking. In that case, the innermost layer consists of a material woven using resin fibers, and the exterior is covered with a component made of water-resistant kraft paper, and the exterior is a hemp sack or an exterior body having almost the same strength and friction. A multilayer structure having a structure covered with is an example desirable for waterproofing (the invention according to claim 5). The exterior body that covers the outer surface of the protective bag can increase the structural strength, and the knitted fabric can be prevented from slipping when the protective bag is stacked. In addition, synthetic resin bags that do not have the characteristics of natural hemp bags can also be used. In this case, resin is applied to the flat front and back surfaces of the protective bag, and the effect of improving strength and preventing slipping is given. To increase the effectiveness and make it the same as the weaving structure.

 In the protective bag of the present invention, when a layered structure including a plurality of water-resistant kraft papers is applied as a constituent material, a large number of water introduction holes can be formed on two flat front and back surfaces as a whole. . Kraft paper is tough and flexible as paper, and it is more preferable as a protective bag by having water resistance. Furthermore, when the protective bag component includes a sheet material woven using synthetic resin fibers, the woven structure constitutes another means for improving the water absorption efficiency. Since the sheet material has a woven structure, it is easy for moisture to enter and good supply properties are maintained, and it is also possible to prevent leakage of the superabsorbent polymer after expansion.

The weighted body affects the water absorption performance of the high specific gravity protective bag depending on the form. That is, when the constituent material having a bag-like structure has a rectangular front shape, the weighted body forms an elongated container in the direction of the short side of the rectangular shape of the constituent material and fills the container. Hope Good (see Figure 1). By placing a container of this type in the center of the protective bag component that has a bag-like structure, the component is pressed by the load at the center, so that the protective bag can be used in the water absorption process. As shown in Fig. 6B, both ends are lifted by buoyancy, and as a result, the center part expands and the gusset part opens, creating a space inside the component and improving water absorption performance. Can be improved.

 When the protective bag is inflated by water absorption, it becomes a flat rectangular parallelepiped shape having a sufficient thickness, for example, 10 to 20 centimeters or more, so that it can be stably stacked. It is convenient in terms of storage and transportation convenience. In addition, it is understood that the water guide holes formed in the component material including multiple sheets of water-resistant kraft paper serve as an escape route for the pressure inside the expanded superabsorbent polymer, and when installed for bulletproof purposes, It is also considered to have an effect of inducing a movement route of testicles driven into the conductive polymer.

 Several methods can be used to place a plurality of containers into which the superabsorbent polymer is divided in a protective bag. In the simplest case, it is possible to take a method in which the container is directly bonded to the inner surface of the constituent material of the protective bag having the innermost layer of the texture. In addition, the frame body that houses the container may be bonded to the inner surface of the innermost component, and the container may be fixed to the frame body. In that case, the frame keeps enough space around it so that the container filled with the superabsorbent polymer is not oversqueezed, draws the supplied moisture into the space, and absorbs the moisture into the superabsorbent polymer. Make it easier to penetrate. However, in the case of the present invention, by placing the weighted body inside the constituent material, the weighted body can play a role of securing a space around it, so that it is possible to save the trouble of fixing using the frame body. .

 It is desirable to use a woven fabric made of synthetic fibers and having a knitted fabric to form a reinforcing means to increase the strength of the protective bag and to use the reinforcing means to cover the inner surface of the protective bag This is a configuration. Being a woven fabric is a structure that is desired to allow moisture to penetrate inside, and at the same time satisfies the condition of a tough structure. The reinforcing means is not limited to one layer. As described in claim 5, when the protective bag body has a three-layer structure, there are two layers, one for each layer, depending on the intended strength. Can be set as appropriate.

 Reinforcing means include those laminated on the surface of kraft paper and tubes that are independent of kraft paper. The purpose of reinforcing means is that it can take two different forms: one that is laminated and integrated on the surface of the protective bag body, and another that is independent from the water-resistant kraft paper. What is laminated and integrated on the surface of the protective bag body 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 . The present invention is configured and operates as described above. Since the required amount of the superabsorbent polymer is divided into a plurality of parts and arranged inside the constituent material, the water supply to the superabsorbent polymer is performed. Is carried out promptly and on average, no matter who handles it, it surely expands in a few minutes, and the expanded one has a specific gravity greater than that of the water and is sufficient for the expected water flow when constructing a waterproof embankment Since it can counteract, stable protection performance can be obtained, and when a waterproof levee or bulletproof wall is built, the intended purpose can be achieved reliably. Further, according to the present invention, when the protective bag is inflated, the flat shape of the rectangular parallelepiped shape is maintained. Therefore, when the front and back surfaces of the protective bags are pressed and stacked, the side surfaces of the end portions are brought into close contact with each other, and a gap is formed. It is very effective for both waterproofing and fendering. Brief Description of Drawings

FIG. 1 is an exploded perspective view showing an example of a high specific gravity protective bag according to the present invention, FIG. 2 is a perspective view showing an inflated state of the high specific gravity protective bag according to the present invention, and FIG. 2 more 4 is a partial cross-sectional view of the same as above, FIG. 5 is a partially enlarged cross-sectional view of the non-inflated high specific gravity protective bag, and in FIG. B and C are explanatory diagrams showing the water absorption and expansion process in the protective bag of the present invention with a high specific gravity, and FIG. 7 is an explanatory diagram showing an example 1 of a stacking state and a shooting test of the high specific gravity protective bag of the present invention. FIG. 8 is an explanatory view showing Example 2 in the same manner. Explanation of symbols

 1 0 High specific gravity protective bag according to the present invention

 1 1 Container

 1 2 Components of innermost layer

 1 4 Super absorbent polymer

 1 5 Weighted body

 1 6 Iron oxide powder

 1 7 Middle layer components

 1 8 Woven fabric

 1 9 Woven tube

 2 0 Water conveyance hole

 2 1 Sealing band

 2 2 gusset

 2 3, 2 4 Non-hole

 2 5 Constituent material of outermost layer Best mode for carrying out the invention

 Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. FIG. 1 shows an example of a high specific gravity protective bag 10 according to the present invention. As a superabsorbent polymer, an appropriate amount of powdery powder is divided into a plurality of water-soluble paper made of a water-soluble resin. The sachet-shaped container 11 formed by use is filled.

 The storage bag 11 is used to hold the powdery superabsorbent polymer in the form of water-soluble paper sachets until it is used. It is made as a bag so that the expansion of the polymer proceeds. The superabsorbent polymer is composed of a powder containing 92% cross-linked polyacrylate, and rapidly expands when water is supplied to the water-soluble paper and dissolves. The innermost layer of the protective bag 10 The components 1 and 2 are evenly distributed in the interior.

 In the example shown in the figure, the superabsorbent polymer 14 is composed of a plurality of containers 1 1 divided into appropriate amounts and placed inside the innermost component 1 2 of the protective bag 10. It is arranged on both sides in the longitudinal direction of the weight 15 and is fixed by adhesion shown by reference numeral 13 (see FIG. 4). For this reason, the containers 11 are distributed in half, which contributes to the equalization of the expansion. In addition, as illustrated in FIG. 4, since the gap g is formed around the container 11 and the weighted body 15, the water permeability is improved.

The illustrated protective bag 10 has a volume after expansion of about 20 liters. In this case, the protective bag 10 according to the present invention is easily floated by water. As a weighted body 15 for preventing water, a powdered iron oxide powder 16 having a specific gravity greater than 1 is filled in a resin bag-like container (water-insoluble). This iron oxide powder has a specific gravity of about 3.3, and the total weight of the protective bag is about 26 kilograms, which satisfies the condition that it is effective for facing water. 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 collected as resource waste after use. It is suitable for use. The weight body 15 is filled in a bag-like container having an elongated shape, and the longitudinal direction of the weight body 15 is aligned with the direction of the short side of the rectangular shape of the component 12. In other words, the weighted body 15 in the container having the above-mentioned form is disposed laterally in the central portion of the constituent material 12, and means such as adhesion (indicated by reference numeral 13 ′) only on one surface of the inner surface. It is stuck by. The fixing position is good at the center so that the component 1 2 is divided into approximately two parts.

 The illustrated protective bag 10 has a structure in which the constituent material has a plurality of layers inside and outside, and the constituent material 12 in the innermost layer has a structure knitted using resin fibers. (Figure 1, Figure 4, Figure 5). The one woven using resin fibers, that is, the resin sheet, is made of polyethylene cloth (PEC) using polyethylene fiber, which exhibits water permeability and absorbs water to form a gel. Prevent leakage of superabsorbent polymer made of crosslinked polyacrylate. In the example of FIG. 1, the constituent material 1 2 is illustrated as the innermost layer among the constituent materials comprising the inner and outer layers, but only this constituent material 1 2 can be used as the specific gravity protective bag 1 according to the present invention. 0 is constituted.

 The constituent material of the illustrated protective bag 10 is composed of the constituent materials 17, 25, which form a plurality of layers inside and outside, as will be further described below. As described above, the innermost layer 12 is made of a knitted fabric using resin fibers, and the outside is covered with a component 1 7 made of water-resistant kraft paper. It has a structure covered with an outermost layer component 25 made of an exterior body having the same strength and friction. Here, the bag structure of the intermediate layer component 17 has a foldable gusset portion 2 2, and the innermost layer component 1 2 and the outermost layer component 2 5 are connected to the gusset portion 2 2. It has dimension variations that can form the corresponding thickness.

 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. In the example, it has a layered structure 2 For 0 kilograms. Further, the intermediate layer material 17 made of water-resistant kraft paper as 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 laminated through, for example, heat welding, and is formed through a tube-making and bag-making process using a component 17 of an intermediate layer of water-resistant craft paper. . The material of the woven fabric 18 is not limited to polyethylene, but other materials such as polypropylene can also be used, but 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 drilled to make a hole to fix the stacked protective body, 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). This woven tube 19 is disposed in the innermost layer of the water-resistant kraft paper bag, and therefore, the one constituting the innermost layer component 12 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. The sachet-shaped container 11 is fixed to the component material 12 (in the innermost layer) before the protective bag 10 is closed by the sealing band 21. Polyethylene cloth (PEC), polypropylene and other materials can be used for the textile material of the woven tube 19 as well as the woven fabric 18 described above. However, in the example, the woven fabric 18 is used as a film. While the flatness of the thin tube increases the integrity of the intermediate layer component 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 the entire intermediate layer constituting material 17 having the above-described structure. The water guide hole 20 is formed on both the front and back surfaces so that moisture can be supplied from almost all directions quickly to the container 11 of the container arrangement portion fixed to the innermost layer constituent material 12. It is formed with a substantially uniform distribution throughout. However, water guide holes 20 may be provided on the gusset side, but water guide holes 20 are provided at both ends close to the sealing band 21. The non-perforated part 2 3 that cannot be opened is set. The non-hole portion 23 is provided so as to surround the water guide hole 20 in a frame shape, and functions to direct or limit the escape space of the pressure inside the superabsorbent polymer together with the water guide hole 20.

 Furthermore, for example, a hemp bag is combined with the protective bag 10 as the outermost component 25. The outermost layer component 25 has a size and shape that can cover the entire protective bag completely, and has a bag structure with two or three sides closed except for the end. The protective bag 10 from the end opening 26 to the innermost layer component 12 and the intermediate layer component 17 is placed inside. The outermost layer component 25 is intended for strength improvement means and anti-slip means. In addition, foamable resin may be applied to the essential part of the flat part of the protective bag, or a rubber band may be hung on the protective bag. It is also possible to take such a method. When hemp bags are used as the outermost layer component 25, the innermost layer component 12 and the protective layer 10 up to the middle layer component 17 are placed inside, and then the end openings 26 are It is desirable to place it completely closed by appropriate means such as string, wire or stable.

 Next, the usage method and effects of the protective bag 10 of the present invention configured as described above will be described. First, the protective 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 (FIG. 6A). Then, since the protective bag 10 is pressed by the weight body 15 at the lower part of the central part, both ends are lifted by buoyancy, and the central part is inflated to open the gusset part 22 and the protective bag 10 A space is formed inside (Fig. 6B). As a result, water can easily enter the space inside the protective bag. As a result, the container 11 is quickly and sufficiently supplied with water, and the protective bag 10 is inflated very quickly (FIG. 6C). In this way, by supplying moisture to the superabsorbent polymer, the expansion is completed in 5-7 minutes, and the protective bag has a height of about 17 cm and a weight of about 26-27 kg. Got 0. Fig. 2 shows the appearance of the protective bag 10 of the present invention in which the innermost layer component 1 2 and the intermediate layer component 1 7 have expanded, and Fig. 3 shows the protective bag 10 of Fig. 2 as the outermost layer component 2 The appearance of the protective bag 10 covered with 5 is shown.

 The inflated protective bag 10 of the present invention forms a flat but thick rectangular parallelepiped like a chopped scissors, and is almost in close contact when the end side surfaces are pressed together. Fig. 6 shows a part of a waterproof embankment constructed by stacking inflated protective bags 10 according to the present invention in three rows on the front and back and three layers on the top and bottom. On this waterproof dike, a water basin was set up at a time, and about 300 liters were discharged from a distance of 1 meter, and experimented with tolerance to water flow and water repellency. It was judged that water could hardly leak and the intended purpose could be achieved.

 As described above, it was proved that the high specific gravity protective bag 10 of the present invention can sufficiently withstand flood control applications. In particular, this protective bag 10 is a flat and thick rectangular parallelepiped, so it is easy to handle during construction, and the constructed waterproof levee is solid as a temporary structure and very stable against external forces. It is. Moreover, the protective bag 10 has been confirmed to maintain its intended performance for almost 6 months in the state where the filled superabsorbent polymer is inflated. Is possible.

In addition, a testicle (caliber 5.56 mm, dose 55 55 dahrain) was driven from a point 24 m away from the target with an Ml 6 A 1 type rifle. When 5 shots were shot in a single shot, they were all received by the protective bag 10 of the present invention, and when 30 shots were fired consecutively, 1 2 shots went down from the top row in the front row, and 16 shots were in the top row in the middle row. As a result, 2 shots went down from the upper row of the last row, and there was no one that penetrated the protective bag row of the present invention. Furthermore, Fig. 7 shows that the protective bags 10 of the present invention inflated on a wooden pallet are placed up and down in three rows, standing upright, and 24 m away from the target, using an M l 6 A 1 type rifle. Shown is a shooting test in which a bullet (caliber 5.56 mm, dose 55 dalane) was shot. Although 20 shots were fired continuously, all stayed in one of the protective bags 10 and none of them penetrated. These gun tests were conducted in foreign countries. In Figure 7 and Figure 8, numbers such as 1 2 b, 1 6 b, etc. were typed in each shooting test. Shows the number of bullets b.

 In addition, it has been found that the protective bag 10 according to the present invention is characteristic in that it does not cause deformation or damage to the testicles. As described above, even if the direction is changed by the protective bag 10 and it falls down or up, it is decelerated to a sufficiently safe low speed, and the 弹 maru is recovered almost in its original form without deformation or scratches. Therefore, it is also suitable for checking the line streak that differs depending on the gun. The used protective bag 10 can be separated into powder and water by adding calcium chloride, etc. Also, the iron oxide powder of the weighted body 15 is collected after used, It becomes. Industrial applicability

 The high specific gravity protective bag according to the present invention can be used extensively as a measure against flooding in urban areas especially in urban disaster prevention, and as a means to prevent water from entering underground underground and other underground facilities. The act of terrorism can be used as a bulletproof wall against the attack of the capital guerrilla. In particular, even in cities where it is difficult to obtain sediment, if water is available, it can be expanded and used as a sandbag.

Claims

The scope of the claims 1. Distribute the inside of the component by supplying moisture to the component having the bag-like structure. A protective bag that inflates the supplied superabsorbent polymer and maintains a constant flat shape by the inflation pressure, and the superabsorbent polymer is filled in a container made of a water-soluble resin The quantity is divided into a plurality of parts and placed inside the constituent material, and a weighted body filled with a large specific gravity material having a specific gravity greater than that of water is placed inside the constituent material. The constituent material is made of resin fibers. High specific gravity protective bag with knitted sheet material. The high specific gravity protective bag according to claim 1, wherein the specific gravity of the whole is set to be 1.2 or more in a use state where the super absorbent polymer disposed inside the constituent material is expanded. 2. The high specific gravity protective bag according to claim 1, wherein the high specific gravity substance is a substance mainly composed of iron oxide having a specific gravity of approximately 3 or more. : As a means to maintain a certain flat shape, the component material has a gusseted part located between two flat front and back surfaces in the case of a bag that is folded into one sheet. 2. The high specific gravity protective bag according to claim 1, wherein the portion forms a flat solid having front and rear, left and right side surfaces with sufficient thickness surrounding the front and back surfaces. 5. The constituent material is composed of the constituent material which consists of inner and outer layers, the innermost layer of which is made of knitted fabric using coconut fiber, and the outer part is covered with the constituent material of water-resistant kraft paper. 2. The high specific gravity protective bag according to claim 1, further comprising a structure in which the outside is covered with a hemp bag or an exterior body having substantially the same strength and friction as that of the hemp bag.