Solidified weed control material, method for manufacturing solidified weed control material

Abstract

To provide a weed suppressing material solidified product for adjusting plant morphology (size, color, flowering time, etc.) over a long period of time and continuously maintaining (controlling) the plant morphology by installing it at a desired location.SOLUTION: A manufacturing method of a weed suppressing material solidified product includes: preparing a mixture consisting of a suppressing member that contains a component element having a grass-suppressing action of inhibiting growth of a plant to suppress growth of the plant and a solidifying member mixed at a prescribed ratio, with the weed suppressing material; mixing silica sand 6 with the mixture and kneading them; and preparing a kneaded material 7 (a grass suppressing material solidified material 11) by solidifying the mixture to form a water channel 12 in order to elute the suppressing member in a desired state.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a weed control material solidified product containing a suppressing component for regulating (suppressing) the growth of plants, and a method for manufacturing the weed control material solidified product.

Background Art

[0002] In areas such as the sites of power transmission lines, river embankments, road slopes, median strips, airport landing strips, etc., for erosion prevention, safety assurance, landscape preservation, foundation erosion prevention, flying sand prevention, etc., plants may be planted for greening. If the plants for greening grow too much, there is a risk of having an adverse impact in terms of crime prevention, appearance, and function, so regular maintenance such as mowing is necessary. However, since such greening locations are places where it is difficult for people to enter, the current situation is that maintenance requires a great deal of labor, time, and cost.

[0003] For this reason, conventionally, instead of regular mowing work, herbicides or the like are used to wither the plants so that the plants do not grow, eliminating the adverse impact caused by the growth of plants beyond necessity (for example, Patent Document 1). The technology disclosed in Patent Document 1 is a technology for reducing the burden of weeding by mixing an agent that suppresses growth into the herbicide.

[0004] In areas where greening is carried out, it is important in terms of the environmental image, etc. that the plants continue to exist even if the amount of plants decreases. However, when using the technology of Patent Document 1, since it is a technology for weeding, after weeding, the greening area will be in a state where no plants are growing. If weeding is carried out in the greening area and the plants are eliminated, the landscape including the impression on appearance and safety will be damaged, and currently, it is not a good idea to carry out weeding in the greening area.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

[0006] The present invention has been made in view of the above circumstances, and aims to provide a solidified weed control material that, when installed in a desired location, accurately releases inhibitory components, adjusts the morphology of plants (size, color, flowering time, etc.), and continuously maintains (controls) the morphology of plants.

[0007] The present invention has been made in view of the above circumstances, and aims to provide a method for producing a solidified weed control material that, when installed in a desired location, accurately releases inhibitory components, adjusts the morphology of plants (size, color, flowering time, etc.), and continuously maintains (controls) the morphology of plants. [Means for solving the problem]

[0008] To achieve the above objective, the weed-suppressing material solidification according to claim 1 of the present invention is: Plants Controlling growth by adjusting morphology A mixture consisting of a suppression member containing a component element having weed-suppressing properties and a solidification member mixed with the suppression member in a predetermined ratio is placed on the surface of a base material, and a number of the base materials on which the mixture is placed are bonded together to form a kneaded product, and a flow path is secured between the base materials of the kneaded product so that the suppression member is suppressed for a desired period of time. at least 40 months To ensure that the solution is released over time 、 The constituent elements of the aforementioned suppression member are, It contains at least one of the following: boron (B), aluminum (Al), copper (Cu), molybdenum (Mo), iron (Fe), lithium (Li), cobalt (Co), zinc (Zn), and sodium (Na). The content of the suppressing member in the mixture is 30% to 70% by volume. The content of the solidifying agent in the mixture is 80% to 10% by volume. It is characterized by the following:

[0009] In the present invention according to claim 1, the suppressing member is solidified by a solidifying member (solidifying agent, solidification accelerator) and placed on the surface of a base material, and a number of the base materials are bonded together to secure a flow path between the base materials. Rainwater or the like seeps into the flow path and flows through it, and the suppressing member inside the compound is continuously dissolved, and the suppressing member is dissolved over a desired period of time. Furthermore, it is possible to regulate plant growth within a predetermined concentration range while meeting environmental standards. Additionally, the content of the inhibitory component can be appropriately determined. Moreover, the content of the solidifying component (solidifying agent + solidification accelerator) relative to the inhibitory component can be appropriately determined.

[0010] Therefore, by installing it in the desired location, it accurately releases inhibitory components, regulating plant morphology (size, color, flowering time, etc.) and becoming a solidified weed control material that can continuously maintain (control) plant morphology.

[0013] Also, Claim 2 The weed control material solidification product of the present invention relates to the present invention. Claim 1 In the solidified weed control material described above, the solidifying member is characterized in that it is at least a solidifying agent.

[0014] Claim 2 In the present invention relating to this invention, the suppressing member is mixed with a solidifying agent to produce a mixture (for example, a paste). As the solidifying agent, a calcium-containing agent, such as a calcium hydroxide agent, blast furnace slag powder, or seashell powder (uncalcined seashell powder or calcined seashell powder) can be used. It is also possible to mix in a solidification accelerator to promote solidification.

[0015] Also, Claim 3 The weed control material solidification product of the present invention relates to the present invention. Claim 1 or Claim 2 In the solidified weed-suppressing material described above, the suppression member is characterized by being coal ash.

[0016] Claim 3 In the present invention relating to this invention, it becomes possible to effectively utilize waste coal ash (fly ash, clinker ash) as a suppression member.

[0017] Also, Claim 4 The weed control material solidification product of the present invention relates to the present invention. Claims 1 to 3 In the solidified weed control material described in any one of the above, the solidified member is characterized by containing seashell powder.

[0018] Claim 4 In the present invention, seashell powder (uncalcined seashell powder and calcined seashell powder), which becomes waste and presents many problems in disposal, can be effectively utilized as a solidifying agent, making it possible to create a solidified weed control material having a mixture with the desired strength.

[0019] Also, Claim 5 The weed control material solidified product according to the present invention related to Claims 1 to 4 In the weed control material solidified product according to any one of

[0020] Claim 5 In the present invention related to

[0025] Also, Claim 6 The weed control material solidified product according to the present invention related to Claims 1 to 5 In the weed control material solidified product according to any one of

[0026] Claim 6 In the present invention related to

[0027] Also, Claim 7 The weed control material solidified product according to the present invention related to Claim 6 In the weed control material solidified product according to

[0028] Claim 7 In the present invention related to

[0029] For achieving the above object Claim 8 The weed control material solidified product according to the present invention related to Of plants Controlling growth by adjusting morphology Component elements having a weed control effect It contains at least one of the following: boron (B), aluminum (Al), copper (Cu), molybdenum (Mo), iron (Fe), lithium (Li), cobalt (Co), zinc (Zn), and sodium (Na).A mixture consisting of a suppressing member and a solidifying member mixed with the suppressing member in a predetermined ratio is disposed of in such a way that a flow path is secured inside the suppressing member for a desired period of time. at least 40 months It is solidified so that it can be dissolved over a wide area. It is a solidified substance, The content of the suppressing member in the mixture is 30% to 70% by volume. The content of the solidifying agent in the mixture is 80% to 10% by volume. A solidified weed control material characterized by the following features.

[0030] Claim 8 In the present invention relating to this invention, the suppressing member is solidified by a solidifying member (solidifying agent, solidification accelerator) so that a flow path is secured inside, and the suppressing member is dissolved over a desired period of time. Rainwater or the like seeps into the flow path and flows through it, and the suppressing member inside the compound is continuously dissolved, so that the suppressing member is dissolved over a desired period of time.

[0031] Therefore, by installing it in the desired location, it accurately releases inhibitory components, regulating plant morphology (size, color, flowering time, etc.) and becoming a solidified weed control material that can continuously maintain (control) plant morphology.

[0032] To achieve the above objectives Claim 9 The present invention relates to a method for producing a solidified weed control material, which involves plants Controlling growth by adjusting morphology Component elements that have weed-suppressing properties It contains at least one of the following: boron (B), aluminum (Al), copper (Cu), molybdenum (Mo), iron (Fe), lithium (Li), cobalt (Co), zinc (Zn), and sodium (Na). A mixture is prepared by mixing a solidifying member with a suppressing member in a predetermined ratio. The content of the suppressing member in the mixture is set to 30% to 70% by volume, and the content of the solidifying member in the mixture is set to 80% to 10% by volume. A large number of granular base materials are added to the mixture and kneaded, and the kneaded material is filled into a container and left to stand for a predetermined period of time, thereby securing a flow path between the base materials and allowing the suppression member to remain in place for the desired period. at least 40 months The solidified product is characterized by being designed to be eluted over a wide area.

[0033] Claim 9 In the present invention relating to this invention, the suppression member is a mixture in which the suppression member is mixed with a solidifying member (solidifying agent, solidification accelerator), and a large number of base materials and the mixture are kneaded together to form a compound, and the large number of base materials are bound together so that a flow path is secured between the base materials so that the suppression member is dissolved over a desired period of time, resulting in a solidified weed control material.

[0034] Therefore, this method for manufacturing solidified weed control materials allows for precise elution of inhibitory components by installation in a desired location, thereby regulating plant morphology (size, color, flowering time, etc.) and continuously maintaining (controlling) plant morphology. [Effects of the Invention]

[0035] The solidified weed-suppressing material of the present invention, when installed in a desired location, precisely releases inhibitory components, thereby regulating plant morphology (size, color, flowering time, etc.) and continuously maintaining (controlling) plant morphology.

[0036] Furthermore, the method for producing solidified weed control materials of the present invention makes it possible to produce solidified weed control materials that, when installed in a desired location, accurately release inhibitory components, adjust the morphology of plants (size, color, flowering time, etc.), and continuously maintain (control) the morphology of plants. [Brief explanation of the drawing]

[0037] [Figure 1] This is a schematic diagram of the process for manufacturing a solidified weed control material according to one embodiment of the present invention. [Figure 2] This is a schematic diagram of the process for manufacturing a solidified weed control material according to one embodiment of the present invention. [Figure 3] This is an external view of the solidified weed control material. [Figure 4] This is a table illustrating the basic specifications of the components of the solidified weed control material of the present invention. [Figure 5] This graph shows the change in the electrical conductivity of the dissolved fluid over time. [Figure 6] This graph shows the change in pH of the eluted fluid over time. [Figure 7] This graph shows the change in the amount of boron leached over time. [Figure 8] This graph shows the change in the amount of aluminum leached over time. [Figure 9] This graph shows the change in lithium leaching over time. [Figure 10]This graph shows the change in sodium elution over time. [Figure 11] This is an explanatory diagram illustrating an example of the use of a solidified weed control material according to one embodiment of the present invention. [Modes for carrying out the invention]

[0038] The weed-suppressing material solidification of the present invention is a compound for maintaining the growth of plants in a predetermined state. It forms fluid (rainwater) passages in the weed-suppressing material solidification, promoting the seepage and circulation of rainwater into the interior, increasing the surface area in contact with rainwater, and continuously maintaining the elution of a suppressive member containing component elements that inhibit plant growth and suppress its development over a long period of time, thereby enabling the continuous maintenance (control) of the plant's morphology.

[0039] Figures 1 and 2 schematically show the process for manufacturing a solidified weed control material according to one embodiment of the present invention, Figure 3 shows the appearance of the solidified weed control material, and Figure 4 shows the basic specifications of the components of the solidified weed control material of the present invention.

[0040] As shown in Figure 1(a), the following are added to the container 10: coal ash (fly ash: FA, clinker ash is also acceptable) 1 containing the components of the inhibitory member (metallic and nonmetallic) as the main material; paper sludge ash (PSA) 2 as a solidification accelerator (solidification member); blast furnace slag powder (SL) 3 as a solidifying agent (solidification member); and seashell powder (SP) 4 (uncalcined seashell powder and calcined seashell powder) as a solidifying agent (solidification member). The materials are mixed in the container 10 (for example, for 3 minutes) to produce a paste-like mixture 5.

[0041] As shown in Figure 1(b), numerous granular base materials, silica sand 6, are added to the mixture 5 and kneaded (for example, for 3 minutes) to coat the surface of the numerous silica sand 6 with the mixture 5 (the mixture 5 is placed on the surface of the silica sand 6). The numerous silica sand 6 coated with the mixture 5 on their surfaces are joined together (the mixture 5 is joined together) to form a kneaded product 7. For example, silica sand 6 with a particle size in the range of 0.8 mm to 3.3 mm is used.

[0042] Furthermore, granular substrates other than silica sand, such as hard rubber or resin, can be used as the base material. In addition, depending on the size of the solidified weed control material, substrates other than silica sand 6 with particle sizes ranging from 0.8 mm to 3.3 mm can be used.

[0043] As shown in Figure 2(a), the compound 7, in which the silica sand 6 is bonded (the mixture 5 is bonded to itself), is filled into a mold (container) 8, and the mold 8 is vibrated up and down to compact the compound 7. As shown in Figure 2(b), the mold 8 is placed in a case 9 with water at the bottom and left to stand for a predetermined period (for example, two weeks). At this time, it is preferable to seal the mold 8 to prevent the compound 7 inside from drying out.

[0044] After a predetermined period, the mixed material 7 is removed from the mold 8, resulting in a weed-suppressing material solidified product 11, as shown in Figure 3, in which a water (fluid) channel 12 is secured between the silica sand 6 (numerous silica sand 6 coated with the mixture 5 on their surface). Rainwater seeps into the channel 12 and flows through it, causing the suppression member to continuously dissolve from the surface to the interior of the weed-suppressing material solidified product 11, and the suppression member is dissolved over the desired period.

[0045] Therefore, it becomes possible to effectively utilize waste coal ash 1 as a suppression material as the main material. Furthermore, it becomes possible to effectively utilize waste paper sludge ash 2 and / or blast furnace slag powder 3 as solidification materials (solidifying agent, solidification accelerator). In addition, it becomes possible to effectively utilize seashell powder (uncalcined seashell powder / calcined seashell powder) 4, which has become waste and presents many problems in processing, as a solidifying agent to create a solidified weed suppression material 11 with the desired strength.

[0046] Therefore, by installing the solidified weed-suppressing material 11 in the desired location, the elution of suppressive components can be precisely controlled, thereby regulating the plant's morphology (size, color, flowering time, etc.) and continuously maintaining (controlling) its morphology.

[0047] As shown in Figure 4, the role of coal ash 1 is to supply mainly aluminum (Al), sodium (Na), boron (B), and lithium (Li) as weed-suppressing components. In addition to the above, copper (Cu), molybdenum (Mo), iron (Fe), cobalt (Co), and zinc (Zn) are also used as weed-suppressing components. The proportion of silica sand 6 is set to 70% to 90% (for example, 84%). The mixing ratio of coal ash 1, excluding silica sand 6 (of the remaining 16% when silica sand 6 is 84%), is set to 30% to 70% by volume, preferably 40% to 60%. In other words, it is set to 9% of the total. Note that the proportion of silica sand 6 is not limited to 70% to 90%.

[0048] The role of paper sludge ash 2 is to promote solidification (as a solidification accelerator) and to supply sodium (Na) and lithium (Li) as weed-suppressing components. The mixing ratio of paper sludge ash 2 is 10% to 80% (30% to 80%, preferably 40% to 60%) by volume, excluding silica sand 6 (of the remaining 16% when silica sand 6 is 84%). In other words, it is 3% of the total.

[0049] The role of blast furnace slag powder 3 is to solidify and increase strength (as a solidifying agent) and to suppress the leaching of weed-suppressing components. The mixing ratio of blast furnace slag powder 3 is set to 10% to 25% by volume of the mixture excluding silica sand 6 (of which silica sand 6 makes up 84%, or 16% of the remaining 16%). In other words, it is set to 2% of the total.

[0050] The role of seashell powder 4 is to solidify and create a porous structure (as a solidifying agent) and to suppress the leaching of weed-suppressing components. The mixing ratio of seashell powder 4 is said to be 10% to 25% by volume, excluding silica sand 6 (of which silica sand 6 makes up 84%, or 2% of the total).

[0051] Furthermore, the ratio of water to the powder (weed suppressant and solidification accelerator) is set at 0.044.

[0052] The inhibitory member preferably contains at least one of the following elements: boron (B), aluminum (Al), copper (Cu), molybdenum (Mo), iron (Fe), lithium (Li), cobalt (Co), zinc (Zn), and sodium (Na). Therefore, plant growth can be regulated within a predetermined concentration range while meeting environmental standards.

[0053] Based on Figures 5 to 10, we will explain the elution situation in relation to relative precipitation (amount of water released: shown based on the month). Specifically, we will explain the elution situation in relation to relative precipitation (equivalent to the month) when water droplets simulating rainfall are continuously dropped.

[0054] Figure 5 shows the change over time in the electrical conductivity (EC: mS / m) of the eluted fluid, Figure 6 shows the change over time in the pH of the eluted fluid, Figure 7 shows the change over time in the amount of boron eluted, Figure 8 shows the change over time in the amount of aluminum eluted, Figure 9 shows the change over time in the amount of lithium eluted, and Figure 10 shows the change over time in the amount of sodium eluted.

[0055] For 40 months, water simulating rainfall was continuously dripped onto the solidified weed control material 11, and the leaching status in relation to the monthly equivalent relative rainfall was verified.

[0056] As shown in Figure 5, the electrical conductivity (EC: mS / m) was consistently maintained at a predetermined value, confirming the presence of many ions in the water and the sustained dissolution of various components over a long period. As shown in Figure 6, the pH of the dissolved fluid was maintained in the range of 7 to 9, confirming that a state with little fluctuation near neutrality was maintained over a long period.

[0057] As shown in Figures 7 to 10, it was confirmed that boron, aluminum, lithium, and sodium continued to leach, and that the predetermined elution concentrations (mg / L) were maintained over a long period (equivalent to 40 months). In particular, it was confirmed that the elution amounts (elution concentrations) of boron and aluminum remained high and sustained.

[0058] By creating a weed-suppressing material solidified product 11 in which a water (fluid) channel 12 is secured between silica sand 6 (a large number of silica sands 6 coated with mixture 5 on their surface), it was confirmed that the suppression member continues to dissolve from the surface to the interior of the weed-suppressing material solidified product 11, and that the suppression member is dissolved over the desired period of time.

[0059] An example of the use of the solidified weed control material 11 will be explained based on Figure 11. Figure 11 shows the situation when the solidified weed control material 11 according to one embodiment of the present invention is applied to the site of a power transmission line.

[0060] Because power lines are often located in areas that are difficult for people to access, the areas along power lines are often landscaped with greenery. However, if the plants used for greening grow too large, they may have negative impacts on security, appearance, and functionality.

[0061] As shown in the figure, multiple solidified weed-suppressing materials 11 are laid around the base of the transmission tower 22 on the site of the power transmission line 21. Multiple solidified weed-suppressing materials 11 are laid in a desired area around the base block 22a of the transmission tower 22. In addition, multiple solidified weed-suppressing materials 11 are laid along the access path 23 to the transmission tower 22.

[0062] The solidified weed control material 11 contains a suppression member that has a weed-suppressing effect, containing elemental components that inhibit the growth of plants 24 and regulate their growth, and these elemental components continuously leach out. As a result, the area around the foundation block 22a of the transmission tower 22 and the access path 23 to the transmission tower 22 have their morphology, such as the size, color, and flowering time of the leaves, roots, and stems of the plants 24, which is controlled to a desired state over a long period of time, and the desired size, color, etc. are maintained maintenance-free.

[0063] By simply laying down the weed-suppressing material solidified material 11, the morphology of the plants 24 around the foundation block 22a of the transmission tower 22 and the access path 23 to the transmission tower 22 is regulated and their growth is controlled, maintaining the desired size, color, and other conditions over a long period of time. This makes it possible to maintain (control) the morphology of the plants 24 (size, color, flowering time, etc.) within a predetermined range, and to suppress excessive plant growth around the foundation block 22a of the transmission tower 22 and on the transmission tower 22 over a long period of time.

[0064] In other words, the vegetation around the foundation block 22a of the transmission tower 22 (at the base of the tower 22), which is a difficult-to-access area, can be continuously maintained as low grass for a long period of time, which is advantageous for landscape preservation and equipment protection. In addition, by applying the weed-suppressing material solidified material 11 to the access road 23 to the transmission tower 22 in a mountainous area and controlling (adjusting) the plants 24 to be maintained as low grass for a long period of time, the access road 23 can be continuously secured for a long period of time without requiring special maintenance.

[0065] Although the example of applying the solidified weed-suppressing material 11 around the transmission tower 22 was used for the explanation, for example, by laying the solidified weed-suppressing material, which has been processed into a predetermined shape, around the edges of curb sections such as the corners of sidewalks at intersections, the growth of plants growing around the curb can be continuously suppressed for a long period of time. Sand, soil, fallen leaves, etc. tend to accumulate around curbs, and there is a risk of plants (weeds) growing in the compost. By laying the solidified weed-suppressing material, even if deposits accumulate, the growth of plants (weeds) around the curb can be continuously suppressed for a long period of time.

[0066] The solidified weed-suppressing material of the present invention, when installed in a desired location, can regulate the morphology of plants (size, color, flowering time, etc.) over a long period of time, making it possible to continuously maintain (control) the morphology of plants. [Industrial applicability]

[0067] This invention can be used in the industrial field for solidified weed control materials and methods for manufacturing solidified weed control materials. [Explanation of Symbols]

[0068] 1 coal ash 2 Paper sludge ash 3. Blast furnace slag powder 4 seashell powder 5 mixture 6 Silica sand 8 formwork 9 cases 10 containers 11. Solidified weed control material 12 channels 21 Power transmission lines 22 transmission towers 23 Access routes 24 plants

Claims

1. A mixture comprising a suppressing member containing elemental components that have a weed-suppressing effect by regulating the morphology of plants and controlling their growth state, and a solidifying member mixed with the suppressing member in a predetermined ratio, is placed on the surface of a base material, a number of base materials on which the mixture is placed are bound together to form a kneaded product, and a flow path is secured between the base materials of the kneaded product so that the suppressing member is dissolved for a desired period of at least 40 months. The constituent elements of the aforementioned suppression member are, It contains at least one of the following: boron (B), aluminum (Al), copper (Cu), molybdenum (Mo), iron (Fe), lithium (Li), cobalt (Co), zinc (Zn), and sodium (Na). The content of the suppressing member in the mixture is 30% to 70% by volume. The content of the solidifying member in the mixture is 80% to 10% by volume. A solidified weed control material characterized by the following features.

2. In the solidified weed control material according to Claim 1, The solidification member is at least a solidifying agent. A solidified weed control material characterized by the following features.

3. In the solidified weed control material according to Claim 1 or Claim 2, The suppression member is coal ash. A solidified weed control material characterized by the following features.

4. A solidified weed control material according to any one of Claims 1 to 3, The solidification member contains seashell powder. A solidified weed control material characterized by the following features.

5. A solidified weed control material according to any one of Claims 1 to 4, The solidification member includes at least one of either paper sludge ash or blast furnace slag powder. A solidified weed control material characterized by the following features.

6. A solidified weed control material according to any one of Claims 1 to 5, The substrate is silica sand with a particle size of 0.8 mm to 3.3 mm. A solidified weed control material characterized by the following features.

7. In the solidified weed control material according to Claim 6, The solidification member of the mixture is a solidifying agent and a solidification accelerator. The proportion of silica sand in the aforementioned compound is 70% to 90%. A solidified weed control material characterized by the following features.

8. A solidified product comprising a mixture consisting of an inhibitory member containing at least one of the following elemental components that regulate plant morphology and control the growth state: boron (B), aluminum (Al), copper (Cu), molybdenum (Mo), iron (Fe), lithium (Li), cobalt (Co), zinc (Zn), and sodium (Na), and a solidified member mixed with the inhibitory member in a predetermined ratio, wherein the mixture is solidified so that the inhibitory member is dissolved over a desired period of at least 40 months, with a flow path secured inside. The content of the suppressing member in the mixture is 30% to 70% by volume. The content of the solidifying member in the mixture is 80% to 10% by volume. A solidified weed control material characterized by the following features.

9. A method for producing a solidified weed control material, characterized by: mixing a solidifying member in a predetermined ratio with an inhibitory member containing at least one of the following elemental components that have a weed-suppressing effect, such as boron (B), aluminum (Al), copper (Cu), molybdenum (Mo), iron (Fe), lithium (Li), cobalt (Co), zinc (Zn), and sodium (Na), which are component elements that regulate the morphology of plants and control their growth state; preparing a mixture in which the inhibitory member content of the mixture is 30% to 70% by volume, and the solidifying member content of the mixture is 80% to 10% by volume; adding a large number of granular base materials to the mixture and kneading it; filling the kneaded mixture into a container and letting it stand for a predetermined period of time to create a solidified product in which a flow path is secured between the base materials so that the inhibitory member is dissolved for a desired period of at least 40 months.

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