Container-contained road repairing material and road repairing method

Abstract

To provide a repair material for a road contained in a container capable of easily repairing cracks in a road in a short time, convenient in carrying and storing, and convenient in use.SOLUTION: A road repair material that hardens upon mixing two components, a main agent and a curing agent, comprises one of a liquid main agent 18 or a curing agent 20 sealed in an outer bag 12 having a discharge part 24 openably sealed of a container 16 provided with the outer bag 12 and an inner bag 14 housed in the outer bag 12 and broken by pressure from the outside of the outer bag 12, and the other of the liquid curing agent 20 or the main agent 18 is sealed in the inner bag 14.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a containerized road repair material used for repairing cracks in roads. [Background technology]

[0002] In recent years, most roads are paved with asphalt or concrete, but cracks can occur due to aging, fatigue, earthquakes, the passage of heavy vehicles, etc. If cracks in the road are left unattended, they can cause vehicle damage and accidents, and can even lead to the cracks expanding further, so they are repaired using repair materials for safety and road maintenance.

[0003] Known repair materials for repairing cracks in roads include, for example, two-component mixed repair materials (see, for example, Patent Document 1). Two-component mixed repair materials are made by mixing a base agent and a hardener on-site, injecting the mixture into cracks in the road using an injector or the like, and then allowing it to harden at room temperature for a predetermined period of time. This two-component mixed repair material does not require special heating machines or tools, is relatively easy to handle, and can be applied in a short time, so it is used in a variety of sites. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-014741 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, with two-component mixed repair materials, the base agent and hardener must be placed in separate containers, and these two containers must be transported to the site, and the two components must be mixed into one of the containers or another mixing container, then transferred to an injector and injected. This requires storing and managing two different containers, transporting them to the site, and is time-consuming and requires a lot of man-hours. In addition, there are problems such as the need to adjust the mixing amount and the risk of the liquid being damaged when transferring it.

[0006] To solve the above problems, the present invention aims to provide a containerized road repair material that can repair cracks in roads easily and in a short time, is convenient to carry and store, and is easy to use. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides a coating composition that hardens when two liquids, a base resin and a curing agent, are mixed. Made of polyurea resin A road repair material having an openable sealed discharge portion A flexible low-density polyethylene layer an outer bag and a bag that is housed in the outer bag and that breaks when pressure is applied from the outside of the outer bag; A flexible low-density polyethylene layer The road repair material in a container is obtained by sealing either a liquid base agent or a hardener in an outer bag of a container having an inner bag and sealing the other of the liquid hardener or the base agent in the inner bag.

[0008] Alternatively, the outer bag may be constructed from layers of transparent vapor-deposited polyethylene terephthalate, dry laminate, nylon, dry laminate, and low-density polyethylene, in that order from the outer layer side to the inner layer side, and the inner bag may be constructed from layers of low-density polyethylene, dry laminate, and polyethylene film using a polyolefin polymer alloy adhesive chemically modified with a polymerizable vinyl monomer, in that order from the outer layer side to the inner layer side.

[0009] Furthermore, the present invention provides a road repair method using a road repair material made of a polyurethane resin or epoxy resin that hardens when two liquids, a main agent and a hardener, are mixed together. The road repair material in a container is prepared, the container comprising: an outer bag including a low-density polyethylene layer with a sealed discharge port that can be opened; and an inner bag that is contained within the outer bag and includes a low-density polyethylene layer that is ruptured by pressure from outside the outer bag; the outer bag is filled with either a liquid main agent or a hardener; and the inner bag is filled with a liquid hardener or the other main agent; and when repairing cracks in the road, the inner bag is ruptured by pressure from outside the outer bag, causing the liquid in the inner bag to flow out into the outer bag, mixing the main agent and hardener; the mixed liquid of the main agent and hardener is injected into the cracks in the road from the discharge port of the outer bag; and the injected mixed liquid is hardened at room temperature to repair the cracks in the road. [Effects of the Invention]

[0010] The containerized road repair material of the present invention is a road repair material that hardens by mixing two liquids, a base agent and a hardener, and is configured to include a container having an outer bag with an openable, sealed discharge port and an inner bag contained within the outer bag that is ruptured by pressure from outside the outer bag. Either the liquid base agent or the hardener is sealed within the outer bag, and the liquid hardener or the liquid base agent is sealed within the inner bag. This makes it easy to carry to the site, and by applying pressure from the outside of the outer bag of the container to rupture the inner bag, the base agent in the outer bag and the hardener in the inner bag can be easily mixed. The mixed material can then be discharged from the discharge port and injected into road cracks. This allows for easier, faster, and smoother road crack repair work than when the two liquids are contained in separate containers, improving construction efficiency and reducing waste, thereby providing a containerized repair material with a low environmental impact.

[0011] Furthermore, by configuring the outer bag as a self-standing bag with a bottom gusset, the container containing the repair material can be placed upright during storage, transportation, or during repair work, for example, thereby improving usability.

[0012] Furthermore, the inner bag is configured so that part of its periphery is welded to the outer bag, and the other periphery is provided with a bag-breaking seal portion that has a weaker welding strength than the welded portion to the outer bag, making it easier to mix the main agent and hardener, and to discharge the mixed material from the discharge portion for application, etc.

[0013] Furthermore, the outer bag and inner bag are made of a transparent material, and a coloring agent is mixed into the main agent enclosed in the outer bag, so that repairs can be made with a repair material of a color that corresponds to the color of the road, such as asphalt, and since the liquid material on the outer bag side is colored, it is easy to grasp the mixed state to some extent, making it easy to use.

[0014] Furthermore, the discharge part of the outer bag is configured so that the cap that seals the discharge part and the discharge nozzle are detachably replaceable, which prevents unmixed main agent from entering the discharge nozzle when mixing and when injecting, and ensures that the appropriate volumes of main agent and hardener are mixed and injected.

[0015] In addition, the discharge part of the outer bag has a closed discharge nozzle and is configured so that it can be discharged by opening a portion of it, which allows for smooth injection without having to replace the bag after mixing, making it easy to use. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a front view illustrating a containerized road repair material according to one embodiment of the present invention. FIG. [Figure 2] FIG. 2 is an explanatory cross-sectional view of the containerized road repair material according to one embodiment of the present invention, taken along line AA. [Figure 3] 2 is an explanatory diagram of the action when mixing the main agent and hardener of the container-packed road repair material of FIG. 1. FIG. [Figure 4] FIG. 2 is an explanatory diagram of the action of the containerized road repair material of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment of the packaged road repair material of the present invention will be described below with reference to the accompanying drawings. The packaged road repair material of the present invention is a repair material for repairing cracks in roads, and is a packaged road repair material that can be used in a container.

[0018] Figures 1 to 4 show one embodiment of the packaged road repair material of the present invention. Figures 1 and 2 show that the packaged road repair material 10 according to this embodiment is configured by a container 16 having an outer bag 12 and an inner bag 14, with a base agent 18 sealed in the outer bag 12 and a hardener 20 sealed in the inner bag 14.

[0019] The repair material is a two-part, room-temperature-curing repair material that cures at room temperature by mixing a base agent 18 and a curing agent 20. In this embodiment, the repair material is made of, for example, a polyurea resin, which has excellent durability, abrasion resistance, water resistance, heat resistance, chemical resistance, and crack-following properties. The base agent 18 of the repair material is, for example, a liquid polyamine-based base agent made by mixing 3,3'-dichloro-4,4'-diaminodiphenylmethane, carbon black as a colorant, and 2-ethylhexanoic acid. The curing agent 20 is, for example, a liquid polyisocyanate-based curing agent made by mixing diisononyl phthalate and 1,1'-methylenebis(isocyanatobenzene). The base agent 18 and curing agent 20 are mixed at a 1:1 weight ratio and are stored in the outer bag 12 and inner bag 14 of the container 16, respectively.

[0020] The mixture of the base agent 18 and the curing agent 20 as described above has low viscosity before hardening, so it can be smoothly injected into cracks in the road, and at the same time, it hardens in a relatively short time of about one to several hours at room temperature to become a polyurethane resin repair material. Note that the road repair material is not limited to polyurethane resin, and any other repair material such as epoxy resin may be used, and the base agent and curing agent that make up such a repair material may be selected.

[0021] The container 16 has a double-bag structure having an outer bag 12 and an inner bag 14, and is a storage bag that can store the main agent 18 and the hardener 20 separately in a single bag-like container. In this embodiment, the main agent 18 of the repair material is sealed inside the outer bag 12 and on the outside of the inner bag 14, and the hardener 20 of the repair material is sealed inside the inner bag 14. It is also possible to store the hardener 20 in the outer bag 12 and the main agent 18 in the inner bag 14.

[0022] In this embodiment, the outer bag 12 is made of a flexible film made of synthetic resin such as polyethylene, the periphery of which is sealed by welding or the like to form a bag, and is a transparent bag that allows the inside to be seen. The outer bag 12 preferably includes a low-density polyethylene layer. Furthermore, the outer bag 12 preferably has a layer structure in which, from the outer layer side to the inner layer side, transparent vapor-deposited polyethylene terephthalate, dry laminate, nylon, dry laminate, and low-density polyethylene are layered in this order.The outer bag 12 is provided with a bottom gusset 22 on the side that will become the bag bottom, and the outer bag 12 is a self-standing bag that can stand on its own on the floor or ground via the bottom gusset 22. Therefore, the outer bag 12 is provided with a discharge section 24 on the upper end side opposite the bottom gusset 22. The discharge section 24 communicates between the inside and outside of the outer bag 12 and is a means for discharging the liquid material inside the outer bag 12. As shown in FIG. 4 , for example, a cap 26 and a discharge nozzle 28 are removably and replaceably attached to the discharge section 24. In this embodiment, the discharge section 24 and the cap 26 or discharge nozzle 28 are detachably and replaceably attached by, for example, forming a male thread on the outer periphery of the discharge section 24 and forming female threads on the insides of the cap 26 and the discharge nozzle 28, which are screwed together to enable detachment and replacement.

[0023] In this embodiment, before use and when mixing the base agent and hardener in the container, the cap 26 is attached to the discharge part 24. This effectively prevents unmixed base agent or hardener from remaining in the discharge nozzle 28 when mixing the base agent and hardener. After mixing the base agent and hardener, when injecting the mixture into a crack in the road, the cap 26 is removed and replaced with a discharge nozzle 28 with an open tip, which can then be attached to perform the injection work.

[0024] The discharge nozzle 28 may be configured such that a sealed tip is attached in advance to the discharge part 24. In this case, the tip of the discharge nozzle 28 is kept closed before use and when mixing the base agent and hardener in the container, and when injecting the mixed liquid after mixing the base agent and hardener, the tip of the discharge nozzle 28 may be cut or otherwise opened to discharge the mixed liquid.

[0025] The inner bag 14 is made of a flexible film made of synthetic resin such as polyethylene, and is a transparent bag that allows the inside to be seen. The inner bag 14 preferably includes a low-density polyethylene layer. Furthermore, the inner bag 14 preferably has a layer structure in the following order from the outer layer side to the inner layer side: low-density polyethylene, dry laminate, and polyethylene film using a polyolefin polymer alloy adhesive chemically modified with a polymerizable vinyl monomer.In this embodiment, the inner bag 14 is formed into a bag shape by welding the periphery of a flexible film, for example, and the welded portion on the bottom side is fixed to the welded portion 30 on the bottom gusset side of the outer bag 12. The welded portion on the top end of the inner bag 14 and the welded portions on the three sides excluding the bottom side are formed in a weakly bonded state that makes them relatively easy to tear. In other words, the upper peripheral edge of the inner bag is provided with a bag-breaking seal portion 32 that has a weaker weld strength than the welded portion 30 to the outer bag. Therefore, when pressure is applied to the inner bag 14 from the outside with the hardener 20 sealed inside, the outward pressure of the hardener 20 causes the weakly bonded welded portion to break, causing the hardener 20 to flow out of the inner bag 14 and mix with the main agent in the outer bag 12.

[0026] When the containerized road repair material 10 of this embodiment is used and road repair methods Before use, the containerized road repair material 10 contains the main agent and the hardener separately in one double-bag container, eliminating the need to manage and transport two types of containers as in the past, making it convenient in terms of storage, management and transport. When using it at a site where cracks have occurred in the road, the worker applies strong pressure with his hands from the outside of the outer bag 12, as shown in Figure 3, to break the bag by breaking the bag-breaking seal part 32 of the inner bag 14 contained within the outer bag 12. When the inner bag 14 is broken within the outer bag 12, the hardener sealed in the inner bag 14 flows out into the outer bag 12, and the main agent and hardener are mixed. Furthermore, the worker can knead or loosen the material with his hands. ShakeThe base agent and hardener are thoroughly mixed inside the outer bag 12 while being mixed. Then, as shown in Figure 4, the cap 26 is removed from the discharge portion 24 and the discharge nozzle 28 is attached. The tip of the discharge nozzle 28 is cut open, and the mixture of the base agent and hardener is injected into the cracks in the road from the tip of the discharge nozzle 28 of the outer bag 12. After curing at room temperature for one to several hours, the mixture hardens and repairs the cracks as a repair material. Because the mixture can be mixed and injected in a single container before use, there is no need to prepare two different containers for the base agent and hardener or transfer the liquid to a separate container, as in the past. This eliminates the need for careful handling and spillage, and road crack repair can be completed with simple operation and in a short time. Furthermore, since only one bag-shaped container remains after application, it can be carried home in a compact form and easily disposed of.

[0027] The containerized road repair material of the present invention described above is not limited to the configuration of the above-mentioned embodiment, and any modifications may be made within the scope that does not deviate from the essence of the present invention described in the claims. [Explanation of symbols]

[0028] 10. Containerized road repair materials 12 outer bag 14 Inner bag 16 Container 18 Main Agent 20 Hardener 22 bottom gusset 24 Discharge part 26 Cap 28 Discharge nozzle 32 Bag tear seal

Claims

1. This is a road repair material that hardens by mixing two liquids: a base agent and a hardener. an outer bag having an openably sealed discharge portion; The container-packed road repair material is characterized in that either a liquid base agent or a hardener is sealed in the outer bag of the container, and the other of the liquid hardener or the base agent is sealed in the inner bag, and the container has an inner bag that is housed in the outer bag and breaks when pressure is applied from outside the outer bag.

2. 2. The containerized road repair material according to claim 1, wherein the outer bag is a self-standing bag having a bottom gusset.

3. A containerized road repair material as described in claim 1, characterized in that a portion of the inner bag's periphery is welded to the outer bag, and the other periphery is provided with a bag-breaking seal portion which has a weaker welding strength than the welded portion to the outer bag.

4. The outer bag and inner bag are made of transparent material.

2. The container-packed road repair material according to claim 1, wherein a coloring agent is mixed with the main agent enclosed in the outer bag.

5. 2. The containerized road repair material according to claim 1, wherein the discharge portion of the outer bag is provided with a cap for sealing the discharge portion and a discharge nozzle that are detachable and replaceable.

6. 2. The containerized road repair material according to claim 1, wherein the discharge portion of the outer bag has a closed discharge nozzle and is provided so as to be discharged by opening a part of the outer bag.

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