JP5558664B2 - Manufacturing method of water retention member - Google Patents

Description

The present invention relates to the production how the water retention member.

  In recent years, on the rooftops of buildings and verandas, balconies, and rooftops of housing complexes, planting has been increasing to improve the landscape and suppress the heat island phenomenon. However, on the rooftops of buildings, etc., the weight is restricted by the Building Standards Act, so the soil cannot be thickened. For this reason, there have been many problems such as frequent irrigation and insufficient plant growth.

In order to solve such a problem, a member capable of cultivating a plant without using soil has been proposed (see, for example, Patent Documents 1 and 2).
Japanese Patent Laid-Open No. 11-103662 JP 2002-51637 A

  Patent Document 1 discloses a resin foam containing a temperature-sensitive water-absorbing polymer. Specifically, in the process of remolding recycled urethane foam from waste urethane foam, a temperature-sensitive water-absorbing polymer having a temperature sensitive point different from 20 ° C., 25 ° C., and 30 ° C. was mixed at a ratio of 1: 2: 2. A urethane foam molded body having a thickness of 7 cm in which a product is dispersed and mixed at a rate of 10 g per 1 L of molded urethane foam is disclosed.

Patent Document 2 also discloses a resin foam containing a temperature-sensitive water-absorbing polymer. Specifically, in the step of remolding the recycled urethane foam from the chip-like urethane foam, the temperature-sensitive water-absorbing and draining resin particles having a temperature sensitive point different from 15 ° C., 20 ° C., 25 ° C., 30 ° C., 35 ° C. A urethane foam molded body having a thickness of 5 cm is disclosed in which a mixture of 10%, 15%, 30%, 35%, and 10% is dispersed and contained at a rate of 5 kg / m ³ .
Furthermore, in Patent Document 2, in the process of molding hydrophilic polyester fibers into a nonwoven fabric, temperature-sensitive water-absorbing and draining resin particles having temperature-sensitive points different from 15 ° C, 20 ° C, 25 ° C, 30 ° C, and 35 ° C are obtained. Disclosed is a fiber compression molded product having a thickness of 5 cm in which a mixture of 10%, 15%, 30%, 35%, and 10% is dispersed and contained in the fiber at a rate of 5 kg / m ^3. Yes.

  However, in the urethane foam molded body disclosed in Patent Documents 1 and 2, waste urethane foam (chip-shaped urethane foam) is bonded to each other with an adhesive. It will adhere to scrap urethane foam (framework). For this reason, when the water-absorbing polymer absorbs water, the adhesive prevents the swelling due to water absorption. Moreover, since the waste urethane foam is compression-molded, the gap is reduced, and a space where the water-absorbing polymer swells due to water absorption is not sufficiently secured. For this reason, it was not possible to secure a sufficient amount of water retention that can sufficiently absorb the water by fully exhibiting the original characteristics of the water-absorbing polymer.

  In addition, Patent Document 1 proposes a method of adding and mixing a temperature-sensitive water-absorbing polymer powder to a foam material and stirring and stirring and foaming / curing by a conventional method as another manufacturing method. However, in this method, part or all of the water-absorbing polymer is incorporated into the skeleton of the urethane foam. Therefore, when the water-absorbing polymer absorbs water, the skeleton prevents swelling due to water absorption, and the water-absorbing polymer It is considered that the original properties possessed sufficiently cannot be absorbed properly.

  Moreover, in the fiber compression molding currently disclosed by patent document 2, in order to adhere | attach (weld) nonwoven fabrics by an adhesive agent or a heat | fever in the state which disperse | distributed the water absorbing polymer to the surface of the nonwoven fabric to laminate | stack, water absorption A part of the polymer is adhered to the nonwoven fabric. For this reason, as with the aforementioned urethane foam molded article, when the water-absorbing polymer absorbs water, swelling due to water absorption is hindered by the adhesive, so that the original characteristics of the water-absorbing polymer are fully exhibited and water is absorbed appropriately. However, it was not possible to secure a sufficient amount of water.

The present invention has been made in view of the present situation, and is capable of adequately absorbing water by sufficiently exhibiting the original characteristics of the water-absorbing polymer and capable of ensuring a sufficient water retention amount. and to provide a manufacturing how sexual member.

A continuous porous layer having a skeleton multiple holes constituting the gap portion of the continuous pore shape linked in three dimensions, a continuous porous layer holder comprises a part or all located within the gap portion, A water-absorbing polymer capable of repeatedly performing water absorption and drying, wherein the water-absorbing polymer is partially or entirely incorporated into the skeleton of the continuous porous layer. In addition, a water-retaining member that is disposed in the gap without being bonded to the skeleton with an adhesive that bonds the skeletons to each other is preferable .

In the water-retaining member described above, the water-absorbing polymer is not partially or completely incorporated into the skeleton of the continuous porous layer, and is not bonded to the skeleton with an adhesive that bonds the skeletons to each other. It is arranged in the department. Thereby, when the water-absorbing polymer absorbs water, swelling due to water absorption is not hindered by the skeleton or the adhesive, so that the original characteristics of the water-absorbing polymer can be fully exhibited and water can be absorbed appropriately. Therefore, according to the water retention member described above , it is possible to ensure a sufficient amount of water retention.

  In addition, as the continuous porous layer, in addition to a material that constitutes a continuous pore-shaped void portion in which a plurality of pores are three-dimensionally connected with only the substance constituting the skeleton (not including an adhesive), the skeletons Also included are those that are bonded with an adhesive to form a void. Moreover, as a continuous porous layer holding | maintenance body, as long as a continuous porous layer is provided in the one part or the whole, any may be sufficient. Among these, examples of the continuous porous layer holder having a continuous porous layer as a whole include resin foams (polyurethane foam, etc.), sponges, and fiber structures (nonwoven fabrics, etc.). In addition, as a continuous porous layer holding body partially including a continuous porous layer, for example, an artificial turf including a continuous porous layer (such as a resin foam or a fiber structure) in a base portion, a container bottom or a side wall And flower pots and planters having a continuous porous layer (resin foam, fiber structure, etc.).

  Further, the resin foam may be any one as long as the resin is foamed to form continuous pores. Examples thereof include synthetic resin-based foams such as rubber-based, polystyrene-based, polyolefin-based, and polyurethane-based materials. Can do.

  Moreover, a fiber structure refers to what consists of a fiber or a wire, and has a space | gap part inside. For example, non-woven fabrics (sheets, plates, etc.) made mainly of synthetic fibers made of polyamide, polyester, polypropylene, acrylic, polyvinylidene chloride, modacrylic, natural fibers such as pulp, cotton, hemp, rayon, acetate Nonwoven fabrics (sheet-like, plate-like, etc.) mainly composed of regenerated / semi-synthetic fibers such as Also felt or woven fabric may be used. Moreover, what entangled several fiber may be used. Further, a relatively thick fiber such as an insulator fiber or a ribbon-like wood sheet may be knitted or entangled. In addition, plant-derived fiber bodies such as hechima fiber bodies are also included. Moreover, the structure which shape | molded the wire which consists of synthetic resins, such as a polypropylene, a metal, etc. in the three-dimensional network structure is also included.

  In addition, as a water absorbing polymer, a thermogel (made by Kojin Co., Ltd., a brand name) can be illustrated as a water absorbing polymer with high water retention and temperature sensitivity. Further, a water-absorbing polymer having a modified acrylic cross-linked polymer as a main component and having high water retention and excellent salt resistance may be used. Examples of the water-absorbing polymer mainly composed of a modified acrylic cross-linked polymer include Aquaric CS-6 (trade name, manufactured by Nippon Shokubai Co., Ltd.). Furthermore, Aquaric CS-7 (made by Nippon Shokubai Co., Ltd., trade name) can be exemplified as a water-absorbing polymer excellent in heat resistance.

  Further, a continuous porous layer holding body provided with a part or the whole of a continuous porous layer having a skeleton constituting a continuous pore-shaped void portion in which a plurality of pores are three-dimensionally connected, and the void portion is located in the void portion. A water-absorbing polymer capable of repeatedly performing water absorption and drying, wherein the water-absorbing polymer is partially or wholly within the skeleton of the continuous porous layer. Without being taken in, and without being bonded to the skeleton with an adhesive that bonds the skeletons to each other, directly on the surface of the skeleton or the adhesive directly or through another water-absorbing polymer. A water-retaining member that is disposed in the gap is preferably attached.

  In this water-retaining member, the water-absorbing polymer is not partly or entirely incorporated into the skeleton of the continuous porous layer, and is not bonded to the skeleton with an adhesive that bonds the skeletons to each other. Is arranged. Thereby, when the water-absorbing polymer absorbs water, swelling due to water absorption is not hindered by the skeleton or the adhesive, so that the original characteristics of the water-absorbing polymer can be fully exhibited and water can be absorbed appropriately. Therefore, according to this water retention member, it is possible to ensure a sufficient amount of water retention.

Further , a continuous porous layer holding body provided with a part or the whole of a continuous porous layer having a skeleton constituting a continuous pore-shaped void portion in which a plurality of pores are three-dimensionally connected, and the void portion is located in the void portion. A water-absorbing polymer capable of repeatedly performing water absorption and drying, wherein the water-absorbing polymer is partially or wholly within the skeleton of the continuous porous layer. Without being taken in, and without being bonded to the skeleton with an adhesive that bonds the skeletons to each other directly or indirectly through another water-absorbing polymer, A water retention member is preferably disposed in the gap in a state where the water-absorbing polymer that has absorbed water adheres to the surface of a leakage suppressing material that suppresses leakage from the continuous porous layer to the outside.

In the water-retaining member described above, the water-absorbing polymer is directly or without being partly or entirely incorporated into the skeleton of the continuous porous layer, and without being bonded to the skeleton with an adhesive that bonds the skeletons together. Or it is arrange | positioned in the space | gap part in the state adhering to the surface of a frame | skeleton, the surface of an adhesive agent, or the surface of a leakage suppression material indirectly through another water absorbing polymer. Thereby, when the water-absorbing polymer absorbs water, swelling due to water absorption is not hindered by the skeleton or the adhesive, so that the original characteristics of the water-absorbing polymer can be fully exhibited and water can be absorbed appropriately. Therefore, according to the water retention member described above , it is possible to ensure a sufficient amount of water retention.

  In addition, when a part or all of the water-absorbing polymer is disposed in the void portion in a state of adhering to the surface of the leakage suppressing material (in this case, the leakage suppressing material is disposed in the void portion of the continuous porous layer. When the water-absorbing polymer absorbs water, the water-absorbing water-absorbing polymer can be prevented from leaking out from the continuous porous layer. Therefore, water can be appropriately stored in the voids of the continuous porous layer. The structure of this water-retaining structure is, in particular, the size of the pores of the continuous porous layer when the water-absorbing polymer powder or the low-speed water-absorbing polymer powder absorbs 100% of water that can be absorbed (assuming a spherical shape). This is effective when the diameter is larger than the diameter. Even when the pore diameter of the void portion is large as described above, it is possible to prevent the water-absorbing water-absorbing polymer powder from leaking outside from the continuous porous layer by providing the leakage suppressing material in the void portion of the continuous porous layer. Because.

Examples of the leakage suppressing material include fibers (for example, inorganic fibers such as rock wool and glass fibers, organic fibers such as PP fibers), clay minerals (for example, bentonite, sepiolite, attapulgite, etc.), thickeners (for example, , Hydroxyethyl cellulose, etc.).
Among these, fibers are particularly preferable in that the water-absorbing polymer powder or the low-speed water-absorbing polymer powder that has absorbed water repeatedly over a long period of time can be prevented from leaking out of the continuous porous layer. In addition, it is preferable to dispose the fibers in the voids of the continuous porous layer, since water easily passes through the fibers and is absorbed by the water-absorbing polymer in the voids of the continuous porous layer. In addition, even when the water-absorbing polymer absorbs water, a gap can be secured in the gap, so that the air permeability and water permeability in the continuous porous layer can be improved. Thereby, when growing a plant using the above-mentioned water retention member, it is possible to prevent root rot of the plant and the like, and it is possible to grow the plant appropriately, which is preferable.

  Further, the water retention member may be a water retention member including fibers as the leakage suppressing material.

In the above-mentioned water retention structure, fibers are included as a leakage suppressing material. For this reason, it can suppress that the water absorbing polymer which absorbed water repeatedly over a long period of time leaks outside from a continuous porous layer. Therefore, water can be stored more appropriately in the voids of the continuous porous layer.
For example, when rock wool is used as the fiber, a water-absorbing polymer is used for a water-permeable pavement (continuous porous layer) containing natural stone having a particle size of 5 to 13 mm and sand having a particle size of 5 mm or less as an aggregate. Powder (Thermogel, manufactured by Kojin), water absorption rate reducing agent (glycerin), water and rock wool (fine cotton, manufactured by Nippon Rockwool Co., Ltd.) at a ratio of 1: 30: 126: 3 or less (weight ratio). It is preferable to use a mixed water retention agent. In addition, for a continuous porous layer made of a fiber structure (moy drain, manufactured by Yoshihara Chemical), water-absorbing polymer powder (Thermogel B01, manufactured by Kojin), water and rock wool (granular cotton, manufactured by Nippon Rockwool Co., Ltd.) ) In a ratio of 1: 150: 1.5 to 10 (weight ratio) is preferably used.

  Furthermore, in any one of the above water-retaining members, the continuous porous layer holding body may be a water-retaining member including the continuous porous layer that does not include aggregate.

Examples of the continuous porous layer that does not include aggregates include resin foams such as polyurethane foam, and fiber molded bodies formed by molding fibers such as nonwoven fabrics.
Aggregate refers to sand, gravel, ceramic particles, etc. used in addition to binders (cement, asphalt, etc.) in order to firmly retain the shape of concrete products, pavements and the like.

Furthermore, in the above water-retaining member, the continuous porous layer is preferably a water-retaining member that is a fiber structure formed by forming a fiber or a wire into a three-dimensional network structure.
By making the continuous porous layer into a fiber structure, the water-retaining member can be reduced in weight and the cost can be reduced.

  Further, in any one of the above water-retaining members, the water-absorbing polymer may absorb the water-absorbing polymer that has absorbed the liquid directly or indirectly through the other water-absorbing polymer that has absorbed the liquid. A water-retaining member formed by being dried while being in contact with the surface of the adhesive, and directly adhering to the surface of the skeleton or the adhesive directly through another water-absorbing polymer. Is preferable.

  Further, the water-absorbing polymer according to any one of the above, wherein the water-absorbing polymer absorbs the water-absorbing polymer directly or indirectly through the other water-absorbing polymer that absorbs the liquid. Alternatively, the self-adhesive polymer or the liquid-absorbing polymer that has absorbed the liquid is dried in a state where it is in contact with the surface of the leakage suppressing material that suppresses the leakage from the continuous porous layer to the outside. Or it is good to set it as the water retention member formed by adhering to the surface of the said frame | skeleton or the said adhesive agent, or the said leakage suppression material indirectly through the said other water absorbing polymer.

When the water-absorbing polymer is attached to the surface of the adhesive that bonds the skeletons of the continuous porous layer or the skeletons using another member (such as an adhesive), the other member (such as an adhesive) Due to the influence, there is a possibility that the water absorbing ability of the water absorbing polymer is lowered. On the other hand, in the water-retaining member described above, the water-absorbing polymer that has absorbed the liquid (water, alcohol, etc.) is directly or indirectly through another water-absorbing polymer that has absorbed the liquid, or the skeleton of the continuous porous layer or By drying in contact with the adhesive or leakage control material, the water-absorbing polymer adheres to the surface of the skeleton or adhesive or leakage control material directly or indirectly through other water-absorbing polymers. Yes. Thereby, since the water absorption capability of a water absorbing polymer is not reduced, sufficient water retention amount can be ensured.

In addition, by adhering the water-absorbing polymer to the skeleton or the like in this manner, it is possible to prevent the water-absorbing polymer from dropping from the inside of the continuous porous layer.
The above water-retaining member is, for example, that the water-absorbing polymer is disposed in the void of the continuous porous layer, and the water-absorbing polymer once absorbs an absorbable liquid such as water, and then dried. And you can get it. Moreover, the water-absorbing polymer is dried immediately after the water-absorbing polymer absorbs the liquid, and includes those adhered to the skeleton or the like. For example, the water-absorbing polymer is infiltrated into the voids by sprinkling unabsorbed water-absorbing polymer on a continuous porous layer in which the skeleton is moistened with water, and dried immediately after the water-absorbing polymer absorbs water on the surface of the skeleton. As a result, there may be mentioned those adhered to the skeleton and the like.

  Further, a continuous porous layer holding body provided with a part or the whole of a continuous porous layer having a skeleton constituting a continuous pore-shaped void portion in which a plurality of pores are three-dimensionally connected, and the void portion is located in the void portion. A water-absorbing water-retaining member comprising a water-absorbing polymer capable of repeatedly performing water absorption and drying, wherein the water-absorbing polymer is a part or the whole of the skeleton of the continuous porous layer. Water-absorbed water-retaining water that is swollen by water absorption and formed in a gel state without being taken into the interior or bonded to the skeleton with an adhesive that bonds the skeletons together Sexual members are preferred.

  In this water-absorbing water-retaining member, the water-absorbing polymer is bonded to the skeleton without being partly or entirely incorporated into the skeleton of the continuous porous layer or with an adhesive that bonds the skeletons together. Instead, they are placed in the voids in a gel-like state by swelling due to water absorption. That is, the water-absorbing polymer does not hinder swelling due to water absorption by the skeleton or the adhesive, and adequately absorbs water by fully exhibiting the original characteristics of the water-absorbing polymer. Therefore, with this water-absorbing water retaining member, a sufficient amount of water retention can be ensured.

  Further, in any one of the above water-retaining members, the water-absorbing polymer may be a water-retaining member containing a water-absorbing polymer having temperature sensitivity.

A water-absorbing polymer having temperature sensitivity maintains water absorption until its own temperature reaches a predetermined temperature (referred to as a temperature sensing point), and discharges water when the temperature sensing point is reached (water that has been absorbed is desorbed). Yes). For this reason, in the above-mentioned water retention member, the water-absorbing state can be maintained until the temperature reaches the temperature-sensitive point of the water-absorbing polymer, and the water absorbed when the temperature is reached can be discharged.

Therefore, for example, in a water retaining member including a water absorbing polymer having a temperature sensitive point of about 35 ° C., the water retaining member is heated in the summer and in fine weather, and the temperature of the water retaining member (water absorbing polymer) is 35 ° C. Therefore, the water stored in the water-absorbing polymer is drained and evaporated. The temperature of the water retaining member can be lowered by the heat of vaporization of water required at this time. Even in fine weather, the water stored in the water-absorbing polymer can be retained while the temperature of the water-holding member (water-absorbing polymer) is below 35 ° C. The temperature of the member can be kept low. On the other hand, when it rains, the water retaining member is cooled and the temperature of the water retaining member (water absorbing polymer) is lowered to 35 ° C. or lower, so that water can be stored by absorbing the water absorbing polymer.
In addition, as a water-absorbing polymer powder having temperature sensitivity, for example, Thermogel (trade name, manufactured by Kojin Co., Ltd.) can be used.

  Furthermore, in any one of the above water-retaining members, the water-absorbing polymer may be a water-retaining member including a water-absorbing polymer having a modified acrylic cross-linked polymer as a main component.

The modified acrylic cross-linked polymer has high water retention and salt resistance, and has a small decrease in absorption capacity due to repeated water absorption and drying. For this reason, in the above-mentioned water retention member, high water retention can be ensured over a long period of time.

  Furthermore, any one of the above water-retaining members, the leak-suppressing material that suppresses the water-absorbing polymer that has absorbed water from leaking outside from the continuous porous layer is provided in the void portion of the continuous porous layer. It is good to use a water retention member.

The water retention member described above includes a leakage suppressing material that suppresses the water-absorbing water-absorbing polymer from leaking out of the continuous porous layer in the voids of the continuous porous layer. Thereby, when the water-absorbing polymer absorbs water, it is possible to prevent the water-absorbing water-absorbing polymer from leaking out from the continuous porous layer. Therefore, water can be appropriately stored in the voids of the continuous porous layer.
The structure of the water-retaining structure described above has a pore size of the continuous porous layer particularly when the water-absorbing polymer powder or the low-speed water-absorbing polymer powder absorbs 100% of water that can be absorbed (spherical and This is effective when the diameter is larger than the assumed diameter. Even when the pore diameter of the void portion is large as described above, it is possible to prevent the water-absorbing water-absorbing polymer powder from leaking outside from the continuous porous layer by providing the leakage suppressing material in the void portion of the continuous porous layer. Because.

  Further, the water retention member may be a water retention member including fibers as the leakage suppressing material.

In the above-mentioned water retention structure, fibers are included as a leakage suppressing material. For this reason, it can suppress that the water absorbing polymer which absorbed water repeatedly over a long period of time leaks outside from a continuous porous layer. Therefore, water can be stored more appropriately in the voids of the continuous porous layer.

  Moreover, it is a building, Comprising: The building formed by arrange | positioning one of the said water retention members outside the said building is preferable.

  In this building, since any one of the water retaining members is disposed outside the building, water can be appropriately disposed at the place where the water retaining member is disposed. Here, examples of the exterior of the building include a rooftop of the building, an outer wall surface, a veranda, and a balcony. In this building, for example, it becomes possible to cool the building by the heat of vaporization when the water discharged from the water-absorbing polymer of the water retaining member evaporates at high temperatures such as in summer, and the heat island phenomenon is suppressed. You can also. Further, it is preferable to plant a plant (such as turf) on the water retaining member because the building can be further cooled at a high temperature such as in summer and the air can be purified.

  Further, a continuous porous layer holding body provided with a part or the whole of a continuous porous layer having a skeleton constituting a continuous pore-shaped void portion in which a plurality of pores are three-dimensionally connected, and the void portion is located in the void portion. A water-absorbing polymer capable of repeatedly performing water absorption and drying, wherein the water-absorbing polymer that has absorbed liquid absorbs the liquid directly or in the space. The water-absorbing polymer is dried directly or in the other water-absorbing polymer directly or in contact with the surface of the adhesive that bonds the skeleton or the skeletons to each other. A method for producing a water-retaining member comprising an attaching step of attaching to the surface of the skeleton or the adhesive indirectly through a conductive polymer is preferable.

  In this production method, a water-absorbing polymer that has absorbed a liquid (such as water or alcohol) is bonded to the skeleton or the skeletons directly in the void or directly through another water-absorbing polymer that has absorbed the liquid. It is allowed to dry while in contact with the surface of the adhesive. Accordingly, the water-absorbing polymer (dried water-absorbing polymer) is attached to the surface of the adhesive or the adhesive that bonds the skeletons directly or indirectly through another water-absorbing polymer. Thereby, the water retention member in which the water-absorbing polymer is disposed and adhered in the void portion of the continuous porous layer can be appropriately obtained.

  Moreover, according to this production method, unlike the conventional production methods (see Patent Documents 1 and 2), part or all of the water-absorbing polymer is not taken into the skeleton of the continuous porous layer. The water-absorbing polymer is not bonded to the skeleton with an adhesive that bonds them together. Accordingly, when the water-absorbing polymer absorbs water, the skeleton or the adhesive does not prevent the water-absorbing swelling, so that the original characteristics of the water-absorbing polymer can be fully exhibited and water can be absorbed appropriately. Therefore, according to the production method of the present invention, it is possible to obtain a water retention member capable of securing a sufficient water retention amount.

  When a water-absorbing polymer having thermosensitivity (such as a thermogel) is used as the water-absorbing polymer, water or a monohydric alcohol (ethanol, methanol, propanol, etc.) is used as the liquid that can be absorbed by the water-absorbing polymer. Is preferred.

A continuous porous layer having a skeleton multiple holes constituting the gap portion of the continuous pore shape linked in three dimensions, a continuous porous layer holder comprises a part or all located within the gap portion, A water-retaining member comprising a water-absorbing polymer capable of repeatedly performing water absorption and drying, wherein the water-absorbing polymer that has absorbed liquid is absorbed directly or in the liquid in the gap. Leakage suppression that suppresses leakage of the water-absorbing polymer of the adhesive of the skeleton or of the skeletons or of the water-absorbed water indirectly from the continuous porous layer through the other water-absorbing polymer. It is dried in contact with the surface of the material, and the water-absorbing polymer is directly or indirectly attached to the surface of the skeleton or the adhesive or the leakage-suppressing material via the other water-absorbing polymer. With Method for producing a water retention member with a process is preferred.

In the above-described production method, a water-absorbing polymer that has absorbed a liquid (water, alcohol, etc.) is bonded to the skeleton or the skeletons directly in the void or directly through another water-absorbing polymer that has absorbed the liquid. Dry in a state where it is in contact with the surface of the adhesive or leakage control material. Accordingly, the water-absorbing polymer (dried water-absorbing polymer) is attached to the surface of the adhesive or the leakage suppressing material that bonds the skeletons or the skeletons directly or indirectly through another water-absorbing polymer. Thereby, the water retention member in which the water-absorbing polymer is disposed and adhered in the void portion of the continuous porous layer can be appropriately obtained.

Moreover, according to the above production method, unlike the conventional production methods (see Patent Documents 1 and 2), part or all of the water-absorbing polymer is not taken into the skeleton of the continuous porous layer, The water-absorbing polymer is not bonded to the skeleton by an adhesive that bonds the skeletons. Accordingly, when the water-absorbing polymer absorbs water, the skeleton or the adhesive does not prevent the water-absorbing swelling, so that the original characteristics of the water-absorbing polymer can be fully exhibited and water can be absorbed appropriately. Therefore, according to the manufacturing method described above , it is possible to obtain a water retention member capable of securing a sufficient water retention amount.

  When a water-absorbing polymer having thermosensitivity (such as a thermogel) is used as the water-absorbing polymer, water or a monohydric alcohol (ethanol, methanol, propanol, etc.) is used as the liquid that can be absorbed by the water-absorbing polymer. Is preferred.

  In addition, when the water-absorbing polymer is attached to the surface of the leakage suppressing material directly or indirectly through another water-absorbing polymer (in this case, the leakage suppressing material is disposed in the void portion of the continuous porous layer). When the water-absorbing polymer absorbs water, the water-absorbing water-absorbing polymer can be prevented from leaking out from the continuous porous layer. Therefore, water can be appropriately stored in the voids of the continuous porous layer. This manufacturing method is particularly effective when the pore size of the void portion of the continuous porous layer is 100% when water-absorbing polymer powder or low-speed water-absorbing polymer powder absorbs water that can be absorbed (diameter when assuming a spherical shape). It is effective when it is larger than Even when the pore diameter of the void portion is large as described above, it is possible to prevent the water-absorbing water-absorbent polymer powder from leaking outside from the continuous porous layer by disposing the leakage suppressing material in the void portion of the continuous porous layer. It is.

  Furthermore, in any one of the above methods for producing a water-retaining member, the water-absorbing polymer that has not absorbed or absorbed the liquid is disposed in the void of the continuous porous layer prior to the attaching step. It is good to set it as the manufacturing method of a water retention member provided with the arrangement | positioning process.

In the above-described manufacturing method, prior to the attaching step, the water-absorbing polymer that has not absorbed or absorbed the liquid (water, alcohol, etc.) is placed in the space of the continuous porous layer. If the water-absorbing polymer that has not absorbed the liquid is placed in the voids of the continuous porous layer, then the water-absorbing polymer can be absorbed in the subsequent attachment step if the water-absorbing polymer absorbs the liquid. It can be attached to a surface such as a skeleton. On the other hand, when the water-absorbing polymer that has absorbed the liquid is placed in the voids of the continuous porous layer, the water-absorbing polymer that has absorbed the liquid is dried as it is in the subsequent attaching step. The polymer can be attached to a surface such as a skeleton.

One aspect of the present invention is the above-described method for producing a water retention member, wherein the disposing step is a water retention agent having fluidity, wherein the water absorbent polymer powder and the water absorbent polymer powder are A water retention agent formed by mixing a water absorption rate reducing agent that reduces the water absorption rate and water, or a water retention agent having fluidity, wherein the water absorption polymer powder is absorbed by the water absorption rate reducing agent. Then, an infiltration step is performed in which the water retention agent formed by mixing the low-speed water-absorbing polymer powder having a reduced water absorption rate and water is infiltrated into the void portion of the continuous porous layer by drying it. seen including, the leakage suppression material, fibers, a clay mineral or thickeners, the water absorbing rate lowering agent, organic solvents, viscosity imparting agents, monovalent metal salts or water retention member is an aqueous solution thereof, It is a manufacturing method.

  In the production method of the present invention, a water retention treatment agent obtained by mixing a water-absorbing polymer powder, a water absorption rate reducing agent and water is allowed to enter the voids of the continuous porous layer. Alternatively, a water retention agent formed by mixing low-speed water-absorbing polymer powder and water is allowed to enter the voids of the continuous porous layer. Thereby, since a water absorbing polymer can be arrange | positioned in a space | gap part with water, a water absorbing polymer absorbs water in a space | gap part. Therefore, if the water-absorbing polymer that has absorbed water is dried, the water-absorbing polymer can be attached to the surface of the adhesive that bonds the skeletons or the skeletons. In addition, since the water retention agent used with the manufacturing method of this invention has fluidity | liquidity, it is easy to make it penetrate | invade in the space | gap part of a continuous porous layer. Therefore, it becomes easy to dispose the water-absorbing polymer in the gap.

  By the way, since the water-absorbing polymer powder has a high water absorption speed, when it is simply mixed with water, the water-absorbing polymer powder swells rapidly due to water absorption simultaneously with the mixing with water. For this reason, even after the water-absorbing polymer powder and water are mixed, immediately after the injection of the water retention agent into the void of the continuous porous layer, the water-absorbing polymer powder swells greatly due to water absorption during the injection. Therefore, the water-absorbing polymer powder that has absorbed water may not be injected into the voids of the continuous porous layer. In addition, there is a possibility that the water-absorbing polymer powder swells larger than the pores of the continuous porous layer before the injection into the voids of the continuous porous layer, and the water-absorbing polymer powder that has absorbed water cannot be injected. .

  On the other hand, in the production method of the present invention, the water absorption rate of the water-absorbing polymer powder is reduced by a water absorption rate reducing agent (hydrophilic organic solvent such as alcohol, hydrophilic viscosity imparting agent, monovalent metal salt, aqueous solution thereof, etc.). Use a water retention agent with reduced water content. Alternatively, a water retention agent having a low-speed water-absorbing polymer powder having a reduced water absorption rate is used. Thereby, since the swelling speed by water absorption of a water absorbing polymer becomes slow, the state which the water absorbing polymer contained in a water retention processing agent can permeate in the space | gap part of a continuous porous layer can be kept long. Accordingly, since the water retention agent can be sufficiently injected into the void portion of the continuous porous layer, the water-absorbing polymer can be appropriately and sufficiently disposed within the void portion of the continuous porous layer.

  As the water absorption rate reducing agent, organic solvents (alcohols, ketones, glycol ethers, diols, etc.), viscosity imparting agents (thickeners, stabilizers, gelling agents, pastes, etc.), monovalents Examples thereof include metal salts and aqueous solutions thereof. The viscosity-imparting agent is preferably one that can impart viscosity to water (such as a hydrophilic thickener), but when a viscosity-imparting agent is mixed with an organic solvent, one that can impart viscosity to the organic solvent (acrylic polymer) Etc.)

  Further, a continuous porous layer holding body provided with a part or the whole of a continuous porous layer having a skeleton constituting a continuous pore-shaped void portion in which a plurality of pores are three-dimensionally connected, and the void portion is located in the void portion. A water-absorbing water-retaining member comprising a water-absorbing polymer capable of repeatedly performing water absorption and drying, wherein the water-absorbing polymer and water are placed in the voids of the continuous porous layer. A method for producing a water-absorbing water-retaining member comprising an arranging step of arranging is preferable.

  In this manufacturing method, the water-absorbing polymer and water are disposed in the voids of the continuous porous layer in the disposing step. This allows the water-absorbing polymer to swell due to water absorption without being partly or entirely incorporated into the skeleton of the continuous porous layer or bonded to the skeleton with an adhesive that bonds the skeleton together. And it can arrange | position in a space | gap part in the state which made the gel form. That is, the water-absorbing polymer does not hinder swelling due to water absorption by the skeleton or the adhesive, and adequately absorbs water by fully exhibiting the original characteristics of the water-absorbing polymer. Therefore, according to this manufacturing method, it is possible to obtain a water-absorbing water-retaining member that can secure a sufficient amount of water retention.

  Furthermore, in the method for producing the water-absorbing water-retaining member, the disposing step is a water-retaining treatment agent having fluidity, wherein the water-absorbing polymer powder and the water-absorbing polymer powder have a water absorption rate. A water retention treatment agent obtained by mixing a water absorption rate reducing agent to be reduced and water, or a water retention treatment agent having fluidity, wherein the water absorption polymer powder is absorbed in the water absorption rate reduction agent, Water absorption is completed, including a step of infiltrating the water retaining agent formed by mixing the water with a low-speed water-absorbing polymer powder having a reduced water-absorption rate by drying it into the voids of the continuous porous layer. A method for producing a water-retaining member is preferable.

  In this production method, a water retention agent formed by mixing a water-absorbing polymer powder, a water absorption rate reducing agent, and water is allowed to enter the voids of the continuous porous layer. Alternatively, a water retention agent formed by mixing low-speed water-absorbing polymer powder and water is allowed to enter the voids of the continuous porous layer. Thereby, since a water absorptive polymer can be arrange | positioned in a space | gap part with water, a water absorptive polymer can absorb water appropriately in a space | gap part. In addition, since the water retention agent used with the manufacturing method of this invention has fluidity | liquidity, it is easy to make it penetrate | invade in the space | gap part of a continuous porous layer. Accordingly, the water-absorbing water retaining member can be manufactured smoothly.

  Furthermore, in this production method, the water absorption rate of the water-absorbing polymer powder was reduced by a water absorption rate reducing agent (hydrophilic organic solvent such as alcohol, hydrophilic viscosity imparting agent, monovalent metal salt, aqueous solution thereof, etc.). Use a water retention agent. Alternatively, a water retention agent having a low-speed water-absorbing polymer powder having a reduced water absorption rate is used. Thereby, since the swelling speed by water absorption of a water absorbing polymer becomes slow, the state which the water absorbing polymer contained in a water retention processing agent can permeate in the space | gap part of a continuous porous layer can be kept long. Accordingly, since the water retention agent can be sufficiently injected into the void portion of the continuous porous layer, the water-absorbing polymer can be appropriately and sufficiently disposed within the void portion of the continuous porous layer. For this reason, according to this manufacturing method, the water-absorbing water-retaining member capable of securing a sufficient water retention amount can be obtained.

  Furthermore, any one of the above water-retaining members or a method for producing a water-absorbing water-retaining member, wherein the infiltration step is in a state where the water-retaining treatment agent is in contact with the surface of the continuous porous layer, A method for producing a water-retaining member that compresses and restores the continuous porous layer or a method for producing a water-absorbing water-retaining member is preferable.

Continuous porosity is achieved by compressing and restoring the continuous porous layer in a state where the water retention agent is in contact with the surface of the continuous porous layer (for example, a state in which the continuous porous layer is immersed in the water retention agent). The water retention agent can be infiltrated into the void portion of the quality layer. In particular, when the continuous porous layer is a resin foam, the water retention treatment agent can be efficiently and appropriately infiltrated into the void portion.
Therefore, according to the production method of the present invention, the water-retaining member in which the water-absorbing polymer is arranged and held in the void portion of the continuous porous layer, or the water-absorbing polymer that has absorbed water in the void portion of the continuous porous layer is arranged and held. A water-absorbing water retaining member can be appropriately obtained. In particular, the production method of the present invention is suitable when the continuous porous layer is a resin foam.

  Further, any one of the above water-retaining members or a method for producing a water-absorbing water-retaining member, wherein the water-retaining polymer powder, the water-absorption rate reducing agent, and the water are mixed. The water absorption rate reducing agent constituting the treatment agent is preferably a hydrophilic water-retaining member manufacturing method or a water-absorbing water-retaining member manufacturing method.

  When a water retention agent using a hydrophobic water absorption rate reducing agent is filled in the continuous porous layer, the hydrophobic water absorption rate reducing agent remains on the surface of the water absorbent polymer, and as a result, the water absorbent polymer is affected. The water-absorbing ability is impaired, and good water retention cannot be imparted to the continuous porous layer holder.

On the other hand, in this manufacturing method, a hydrophilic water absorption rate reducing agent is used as the water absorption rate reducing agent. For this reason, after filling the water retention agent of the present invention in the continuous porous layer, the hydrophilic water absorption rate reducing agent can be discharged to the outside of the continuous porous layer along with the passage of time. Therefore, good water retention can be imparted to the continuous porous layer holder.
Moreover, a hydrophilic water absorption rate reducing agent can be appropriately mixed with water. Since the water mixed with the hydrophilic water absorption rate reducing agent is slowly absorbed by the water-absorbing polymer powder, the water absorption rate of the water-absorbing polymer powder is further reduced.

  Examples of hydrophilic water absorption rate reducing agents include hydrophilic organic solvents (alcohols, ketones, glycol ethers, diols, etc.), hydrophilic viscosity imparting agents, monovalent metal salts, aqueous solutions thereof, and the like. Can be mentioned. One of these water absorption rate reducing agents may be contained in the water retention agent, or two or more thereof may be mixed and contained.

Examples of hydrophilic organic solvents include alcohols (ethanol, ethylene glycol, glycerin, etc., 1-3 valent alcohols), ketones (methyl ethyl ketone, acetone, etc.), and glycol ethers (ethylene glycol monobutyl ether, diethylene glycol monobutyl ether). And propylene glycol monomethyl ether), diols (1,3 butylene glycol, etc.), N-methyl-2-pyrrolidone, tetrahydrofuran, dimethyl sulfoxide and the like.
Of these, ethanol, ethylene glycol, and glycerin are particularly preferable because they are inexpensive and do not pollute the natural environment.

By the way, the water-absorbing polymer powder becomes sticky by absorbing the hydrophilic organic solvent, the water-absorbing polymers that have absorbed the hydrophilic organic solvent adhere to each other, and the particles of the water-absorbing polymer become large. It may be difficult to fill the voids of the continuous porous layer.
Therefore, when a hydrophilic organic solvent is used as the water absorption rate reducing agent, it is preferable to select a hydrophilic organic solvent that is difficult to be absorbed by the water-absorbing polymer powder according to the type of the water-absorbing polymer powder. Thereby, the water absorption rate of the water absorbent polymer powder can be reduced, and the water absorbent polymer powder can be appropriately dispersed in the water retention treatment agent.

  Specifically, for example, when a water-absorbing polymer having a temperature sensitivity (such as a thermogel) is used as the water-absorbing polymer powder, it is preferable to use a polyhydric alcohol (such as ethylene glycol, glycerin or propylene glycol). In the case of using a water-absorbing polymer (such as Aqualic CS-6) containing a modified acrylic cross-linked polymer as a main component, it is preferable to use a monovalent alcohol (ethanol, methanol, propanol, etc.).

  In addition to the hydrophilic organic solvent that is hardly absorbed by the water-absorbing polymer powder, a small amount of a hydrophilic organic solvent that is easily absorbed by the water-absorbing polymer powder may be added as a water absorption rate reducing agent. In this way, it is possible to obtain the same effect of reducing the water absorption rate of the water-absorbing polymer powder with a small amount of water-absorption rate reducing agent, compared to the case of using only the hydrophilic organic solvent that is hardly absorbed by the water-absorbing polymer powder. it can. For example, when using a water-absorbing polymer having thermosensitivity (such as a thermogel) as the water-absorbing polymer powder, in addition to 10 parts by weight of glycerin that is difficult to absorb, 1 part by weight of ethanol that is easily absorbed may be added. good.

  Further, as a water absorption rate reducing agent, a small amount of a monovalent metal salt may be added in addition to a hydrophilic organic solvent that is hardly absorbed by the water-absorbing polymer powder. In this way, it is possible to obtain the same effect of reducing the water absorption rate of the water-absorbing polymer powder with a small amount of water-absorption rate reducing agent, compared to the case of using only the hydrophilic organic solvent that is hardly absorbed by the water-absorbing polymer powder. it can. For example, when using a water-absorbing polymer having thermosensitivity (such as a thermogel) as the water-absorbing polymer powder, 0.1 part by weight of a monovalent metal salt is added in addition to 10 parts by weight of glycerin that is difficult to absorb. Anyway. However, since the water absorption capacity of the water-absorbing polymer may be reduced due to the influence of the monovalent metal salt, it is preferable to add the monovalent metal salt in an extremely small amount, and the metal salt resistance is excellent. It is preferable to use a water-absorbing polymer powder (for example, thermogel).

  Examples of the hydrophilic viscosity imparting agent include a hydrophilic thickener, a hydrophilic stabilizer, a hydrophilic gelling agent, and a hydrophilic paste. In particular, polysaccharides such as anionic water-soluble polymers (eg, sodium carboxymethyl cellulose), nonionic water-soluble cellulose ethers (eg, Metrows manufactured by Shin-Etsu Chemical Co., Ltd.), alginates, etc. For example, sodium alginate etc.) and anionic acrylic water-soluble polymer are suitable. Examples of sodium carboxymethylcellulose include CMC Daicel (trade name) manufactured by Daicel Chemical Industries. Examples of sodium alginate include Argitex (trade name, manufactured by Kimika Co., Ltd.). An example of an anionic acrylic water-soluble polymer is Aron A-50P (trade name, manufactured by Toagosei Co., Ltd.). Moreover, as a liquid viscosity imparting agent, Adecanol (Asahi Denka make, brand name) can be mentioned, for example.

  Furthermore, any one of the above water-retaining members or a water-absorbing water-retaining member is produced by mixing the water-absorbing polymer powder, the water-absorbing rate reducing agent, and the water. The treating agent is obtained by mixing the water-absorbing polymer powder with the water absorption rate reducing agent and then mixing it with the water, or mixing the water with the water absorption rate reducing agent and then mixing the water with the water absorption rate reducing agent. It is preferable to use a method for producing a water retaining member mixed with polymer powder or a method for producing a water-absorbing water retaining member.

  In this production method, a water retention treatment agent obtained by mixing water-absorbing polymer powder with a water absorption rate reducing agent to reduce the water absorption rate of the water absorbing polymer powder and then mixing water is used. Alternatively, a water retention agent obtained by mixing water with a water absorption rate reducing agent to reduce the water absorption rate at which water is absorbed by the water absorbent polymer and then mixing the water absorbent polymer powder is used. Such a water retention treatment agent becomes a water retention treatment agent in which the water absorption rate of the water absorbent polymer powder is appropriately reduced by a water absorption rate reducing agent (alcohol, viscosity imparting agent, monovalent metal salt, aqueous solution thereof, or the like). Therefore, according to this production method, the water-absorbing polymer can be appropriately and sufficiently disposed in the void portion of the continuous porous layer.

  However, when the water absorption rate reducing agent is a viscosity imparting agent that is not excellent in water solubility (for example, CMC Daicel), the viscosity imparting agent is first mixed with water and then mixed with the water absorbent polymer powder. It is preferable to use a water retention treatment agent. This is because by mixing water thickened by the viscosity-imparting agent and the water-absorbing polymer powder, the water-retaining treatment agent is more reliably reduced in the water absorption rate of the water-absorbing polymer powder. If CMC Daicel and water-absorbing polymer powder are mixed and then mixed with water, the water absorption speed of the water-absorbing polymer powder is faster than the rate at which CMC Daicel dissolves in the added water. Since the water-absorbing polymer powder is greatly swollen by water absorption, it is difficult to fill the voids of the continuous porous layer. However, in the case of using glycerin as a water absorption rate reducing agent in addition to a viscosity imparting agent that is not excellent in water solubility, the water-absorbing polymer powder is mixed with a water absorption rate reducing agent (viscosity increasing agent and glycerin), and then water is added. Even a water retention agent formed by mixing can be appropriately filled in the voids of the continuous porous layer.

  Further, any one of the above water-retaining members or a water-absorbing water-retaining member, wherein the water-retaining treatment agent absorbs the water-absorbing polymer powder or absorbs the low-speed water-absorbing polymer powder. It is preferable to use a method for producing a water-retaining member obtained by mixing a gelation accelerator, or a method for producing a water-absorbing water-retaining member.

  In this production method, a water retention agent mixed with a gelation accelerator that promotes gelation of a water-absorbing polymer powder that has absorbed water or a low-speed water-absorbing polymer powder that has absorbed water is used. For this reason, the water-absorbing polymer powder or the like that has absorbed water can be rapidly gelled in the voids of the continuous porous layer. Thereby, the water absorbing polymer powder etc. which absorbed water can be appropriately hold | maintained to the aggregate which comprises a continuous porous layer.

  Furthermore, any one of the above methods for producing a water retention member or a method for producing a water-absorbing water retention member, wherein the water retention agent is a method for producing a water retention member obtained by mixing a surfactant, or A method for producing a water-absorbing water-retaining member is preferred.

  Since the water retention treatment agent obtained by mixing the surfactant can appropriately disperse the water-absorbing polymer powder in the water retention treatment agent, the fluidity of the water retention treatment agent can be improved. Therefore, it is preferable to use this water retention treatment agent because the water retention treatment agent can be easily injected into the voids of the continuous porous layer, and the time during which the water retention treatment agent can be injected becomes longer.

  Further, any one of the above water-retaining members, or a water-absorbing water-retaining member, wherein the water-retaining treatment agent contains an anionic water-soluble polymer as the water-absorption rate reducing agent, Prior to the infiltration step, the disposing step is on the surface of the continuous porous layer excluding at least the surface of the inlet that allows the water retention agent to enter the void of the continuous porous layer, and the vicinity thereof. A method for producing a water retention member including a pre-intrusion polyvalent metal salt arrangement step for arranging a polyvalent metal salt, or a method for producing a water-absorbed water retention member.

  An aqueous solution of an anionic water-soluble polymer is crosslinked by adding a polyvalent metal salt to form a gel. Therefore, when a water retention agent containing an anionic water-soluble polymer is used as the water retention agent, the water retention agent can be gelled by reacting the water retention agent with a polyvalent metal salt.

  Therefore, in the manufacturing method of the present invention, prior to the intrusion step, the surface of the continuous porous layer excluding at least the entrance surface and its vicinity, the interface between the continuous porous layer and the other layer and the vicinity thereof It was decided to place a polyvalent metal salt in at least one of the above. Thereby, for example, even when a water retention agent having high fluidity (low viscosity) is injected into the continuous porous layer, the surface of the continuous porous layer and its vicinity, the interface between the continuous porous layer and other layers, and In the vicinity, the water retention agent containing an anionic water-soluble polymer reacts with the polyvalent metal salt and gels (loses fluidity), so the injected water retention agent leaks out from the continuous porous layer. Can be suppressed. Therefore, the water retention agent can be appropriately filled in the voids of the continuous porous layer.

In addition, as a method of disposing the polyvalent metal salt on the surface excluding at least the entrance surface of the continuous porous layer and in the vicinity thereof, for example, the polyvalent metal salt or an aqueous solution thereof is used as the entrance surface of the continuous porous layer. A method of spraying or coating on the surface excluding the above can be mentioned.
Further, as a technique for disposing the polyvalent metal salt at the interface between the continuous porous layer and the other layer and in the vicinity thereof, there is a technique in which an aqueous solution of the polyvalent metal salt is injected from the surface of the continuous porous layer. it can. Alternatively, prior to the formation of the continuous porous layer on the other layer, a polyvalent metal salt or an aqueous solution thereof may be dispersed or applied to the surface of the other layer.

  Further, any one of the above water-retaining members, or a water-absorbing water-retaining member, wherein the water-retaining treatment agent contains an anionic water-soluble polymer as the water-absorption rate reducing agent, The placement step includes a post-intrusion polyvalent metal salt placement step in which a polyvalent metal salt is placed on and around the surface of the continuous porous layer after the intrusion step, or a water-retaining water retention product It is good to use the manufacturing method of a property member.

  In the production method of the present invention, after a water retention agent containing an anionic water-soluble polymer is injected into the continuous porous layer, a polyvalent metal salt is disposed on the surface of the continuous porous layer and in the vicinity thereof. As a result, the water retention agent reacts with the polyvalent metal salt and gels at the surface of the continuous porous layer and in the vicinity thereof (the fluidity is lost), so the water retention agent injected into the continuous porous layer becomes the surface. Leakage from the outside can be suppressed. Therefore, the water retention agent can be appropriately retained in the void portion of the continuous porous layer, and as a result, the water-absorbing polymer can be appropriately and sufficiently disposed in the void portion of the continuous porous layer.

  Further, any one of the above water-retaining members or a method for producing a water-absorbing water-retaining member, wherein the placing step includes the water-retaining portion of the surface of the continuous porous layer prior to the infiltration step. Promote gelation of the water-absorbing polymer powder that has absorbed water or the low-speed water-absorbing polymer powder that has absorbed water at least in the vicinity of the surface of the continuous porous layer excluding the entrance surface that allows the treatment agent to enter the void. It is preferable to use a method for producing a water retention member including a pre-intrusion gelation accelerator arrangement step of arranging a gelation accelerator to be performed or a method for producing a water-absorbed water retention member.

  In this manufacturing method, prior to the infiltration step, the gelation accelerator is added to the surface of the continuous porous layer excluding at least the surface of the inlet and the vicinity thereof, the interface between the continuous porous layer and the other layer, and its Arrange at least one of the neighborhood. Thereby, for example, even when a water retention agent having high fluidity (low viscosity) is injected into the continuous porous layer, the surface of the continuous porous layer and its vicinity, the interface between the continuous porous layer and other layers, and In the vicinity thereof, the water-absorbing polymer that has absorbed water gels upon contact with the gelation accelerator (loses fluidity), so that it is possible to suppress the water-absorbing water-absorbing polymer from leaking out of the continuous porous layer. it can. Therefore, the water-absorbing polymer can be appropriately and sufficiently filled in the voids of the continuous porous layer.

  Examples of the gelation accelerator include clay minerals such as bentonite, sepiolite, and attapulgite. This gelation accelerator may be arranged alone or may be sprayed with a mixed solution mixed with water. Moreover, you may arrange | position with a polyvalent metal salt in the polyvalent metal salt arrangement | positioning process before infiltration.

  Furthermore, any one of the above water-retaining members or a method for producing a water-absorbing water-retaining member, wherein the placing step is performed after the infiltration step on the surface of the continuous porous layer and in the vicinity thereof. A method for producing a water-retaining member comprising a post-intrusion gelation accelerator placement step of placing a gelation accelerator that promotes gelation of the water-absorbent polymer powder that has absorbed water or the low-speed water-absorbent polymer powder that has absorbed water; or A method for producing a water-absorbing water-retaining member is preferable.

  In the production method of the present invention, after injecting the water retention agent into the continuous porous layer, a gelation accelerator is disposed on the surface of the continuous porous layer and in the vicinity thereof. As a result, the absorbed water-absorbing polymer comes into contact with the gelation accelerator and gels (loss of fluidity) on the surface of the continuous porous layer and in the vicinity thereof. It is possible to suppress leakage from the surface to the outside. Accordingly, the water-absorbing polymer can be appropriately and sufficiently injected into the void portion of the continuous porous layer.

  Note that the gelation accelerator (viscous mineral or the like) may be arranged alone, or a mixed solution mixed with water may be sprayed. Moreover, you may arrange | position with a polyvalent metal salt in the polyvalent metal salt arrangement | positioning process before infiltration.

Another aspect of the present invention is the method for producing the water-retaining member, wherein the disposing step includes the water-absorbing polymer powder, and a water-absorption rate reducing agent that reduces the water-absorption rate of the water-absorbing polymer powder. The water absorption rate reducing agent is absorbed in a foamy water retention treatment agent, or the water absorbent polymer powder, which is formed by mixing water and a foaming agent, and then dried to absorb water absorption. A filling step of filling the void portion of the continuous porous layer with a foam-like water retention treatment agent, which is formed by mixing a low-speed water-absorbing polymer powder with reduced speed, water, and a foaming agent to foam. only including, the leakage suppression material, fibers, a clay mineral or thickeners, the water absorbing rate lowering agent, organic solvents, viscosity imparting agents, monovalent metal salts or water retention member is an aqueous solution thereof, It is a manufacturing method.

  In the production method of the present invention, a water-absorbing polymer powder, a water absorption rate reducing agent, water, and a foaming agent are mixed (for example, in the form of a whipped cream) to make a foamy water retention treatment agent a continuous porous layer. It fills in the voids. Or the foam-like water retention agent formed by mixing low-speed water-absorbing polymer powder, water, and a foaming agent to be foamed is filled in the voids of the continuous porous layer. In this way, the water retention agent containing the water-absorbing water-absorbing polymer is made into a foam, thereby reducing the amount of water used, and the water retention agent containing the water-absorbing water-absorbing polymer in the voids of the continuous porous layer. Can be easily filled. Therefore, by drying this, the water-absorbing polymer can be appropriately attached to the surface of the skeleton of the continuous porous layer forming the void (including the surface when an adhesive that bonds the skeletons is included). .

In particular, in the production method of the present invention, since a foamy water retention agent is used, the amount of water filled in the voids of the continuous porous layer is reduced as compared with the case where a liquid water retention agent is used. Can do. Thereby, since the water absorbing polymer which absorbed water can be dried in a short time, manufacture of a water retention member can be completed in a short time.
As the foaming agent, any foaming agent may be used. For example, AE agents such as AE-02 (trade name, manufactured by Kao), Alanon AEL (trade name, manufactured by Kawaken Fine Chemicals), Softazoline CPB (trade name, manufactured by Kawaken Fine Chemical Co., Ltd.) can be used.

  Further, the foaming degree of the foam water retention agent may be adjusted as appropriate depending on the size and material of the voids of the continuous porous layer, but the pressure when filling the foam water retention agent by press fitting, It is preferable that fine bubbles are formed so that the foam does not easily burst by contact with the skeleton of the continuous porous layer. For example, whipping cream-like foaming, shaving cream-like foaming and the like can be mentioned.

  Furthermore, it is a manufacturing method of said water retention member, Comprising: The said foamy water retention treatment agent is good to set it as the manufacturing method of the water retention member which raises the viscosity by mixing of a viscosity imparting agent.

In the production method of the present invention, a foam-like water retention agent whose viscosity is increased by mixing a viscosity-imparting agent is used to fill the voids of the continuous porous layer. Thus, by using the foam-like water retention agent with increased viscosity, it is possible to suppress the foam from bursting when filling it into the voids of the continuous porous layer. Thereby, the foamy water retention agent can be more appropriately filled in the voids of the continuous porous layer.
When the water-absorbing polymer and the viscosity-imparting agent are mixed, they may adhere to each other and cannot be uniformly dispersed in the foam water retention agent. In order to prevent this, it is preferable to use alcohol (such as glycerin) as a water absorption rate reducing agent and mix it with a water absorbing polymer and a viscosity imparting agent. Thereby, a water absorbing polymer and a viscosity imparting agent can be uniformly disperse | distributed in a foam-like water retention agent.

  Further, a continuous porous layer holding body that includes a continuous porous layer having a skeleton that forms a void portion having a continuous pore shape in which a plurality of pores are three-dimensionally connected, and the void portion. A method for producing a supporting member having a supported material supported on the surface of the skeleton, wherein the supported material, a liquid, and a foaming agent are mixed and foamed. A method for producing a carrier member comprising a filling step of filling an agent in the voids of the continuous porous layer is preferred.

In this manufacturing method, the support material, the liquid, and the foaming agent are mixed, and the foamed treatment agent that is foamed (for example, in the form of a whipped cream) is filled in the voids of the continuous porous layer. In this way, the treatment agent containing the supported substance is made into a foam form so that the treatment agent can be easily filled in the voids of the continuous porous layer while using a small amount of liquid (such as water). Can do. Thereby, a to-be-supported object can be made to adhere appropriately to the skeleton surface which constitutes a crevice.
Moreover, in this manufacturing method, since the foam-like treatment agent is used, the amount of the treatment agent and liquid filled in the voids of the continuous porous layer can be reduced as compared with the case where a liquid treatment agent is used. It is preferable because it is possible. In particular, when the continuous porous layer holder filled with the treatment agent needs to be dried, it can be dried in a short time, and thus the production of the support member can be completed in a short time.
In addition, as a to-be-supported object, a pigment, a catalyst (Pt etc.), etc. can be illustrated.

  Further, in any one of the methods for producing a water retention member, the water retention treatment agent or the foam water retention treatment agent is characterized in that the water absorbent polymer powder that has absorbed water or the low speed water absorption polymer powder that has absorbed water is the continuous porous material. It is preferable to use a method for producing a water retention member in which a leakage suppressing material that suppresses leakage from the material layer to the outside is mixed.

In the production method of the present invention, as a water retention treatment agent, a water retention polymer mixed with a water-absorbing polymer powder or a leakage inhibiting material that inhibits the water-absorbed low-speed water-absorbent polymer powder from leaking outside the continuous porous layer. A treating agent is used. This suppresses the water-absorbing water-absorbing polymer from leaking out of the continuous porous layer, and appropriately maintains the state in which the water-absorbing water-absorbing polymer powder is filled in the voids of the continuous porous layer. Can do. Furthermore, even when the dried water-absorbing polymer absorbs water again after filling, it is possible to suppress the water-absorbing water-absorbing polymer from leaking out of the continuous porous layer. Therefore, water can be appropriately stored in the voids of the continuous porous layer.
In the production method of the present invention, in particular, the pore size of the void portion of the continuous porous layer is larger than the size when the water-absorbing polymer powder absorbs 100% of water that can be absorbed (diameter when assuming a spherical shape). It is effective in the case. Even when the pore diameter of the void portion is large as described above, it is possible to suppress the water-absorbing polymer powder that has absorbed water from leaking outside from the continuous porous layer by arranging the leakage suppressing material in the void portion of the continuous porous layer. It is.

Another aspect of the present invention is the method for producing the water retention member, wherein the leakage suppressing material is a fiber, a clay mineral, or a thickener, and the arranging step includes the skeleton and the skeleton. An approach step of allowing the water-absorbing polymer powder to enter the voids of the continuous porous layer in a state where at least a part of the adhesive for adhering each other is moistened with a liquid that can be absorbed by the water-absorbing polymer. It is a manufacturing method of the water retention member containing this.

In the production method of the present invention, at least a part of the skeleton constituting the voids of the continuous porous layer and the adhesive that bonds the skeletons are wetted with a liquid (such as water) that can be absorbed by the water-absorbing polymer. Unabsorbed water-absorbing polymer powder is allowed to enter the voids of the continuous porous layer. As a result, the water-absorbing polymer powder that has entered the voids of the continuous porous layer absorbs the liquid while being in contact with the skeleton of the continuous porous layer. Therefore, by subsequently drying the water-absorbing polymer, the water-absorbing polymer can be attached to the surface of the adhesive that bonds the skeletons or the skeletons as described above. In particular, in the production method of the present invention, since the water-absorbing polymer disposed in the voids of the continuous porous layer absorbs only a small amount of water, the subsequent drying can be performed easily. For this reason, a water retention member can be manufactured cheaply.
The production method of the present invention is particularly suitable when the continuous porous layer is a fiber structure having a large entrance and a relatively high porosity.

  Further, in the method for manufacturing a water retention member, in the entry step, at least a portion constituting an entrance for entering the water-absorbing polymer of the skeleton and an adhesive that bonds the skeletons to each other is used as the liquid. As a non-moist state, the water-absorbing polymer powder may be made into a method for producing a water-retaining member that enters the gap.

  In the production method of the present invention, the portion constituting the entrance for allowing the water-absorbing polymer to enter into the skeleton and the adhesive for bonding the skeletons to each other is not wet with liquid, and the water-absorbing polymer powder is placed in the gap. To enter. Thereby, the water-absorbing polymer absorbs the liquid at the entrance and swells to prevent the problem of blocking the entrance, so that the water-absorbent polymer can be appropriately entered into the gap.

  Furthermore, in the method for manufacturing a water retention member, the placing step is performed after the entering step, in the gap portion constituting the entrance (that is, a portion constituting the entrance of the gap portion). It is preferable to use a method for producing a water-retaining member including a liquid contact step in which the water-absorbing polymer powder disposed in the voids) is brought into contact with a liquid that can be absorbed.

In the manufacturing method of the present invention, after the entering step, the inside of the void that forms the inlet not wet with liquid (that is, the portion of the void that constitutes the inlet for entering the water-absorbing polymer in the skeleton and the adhesive) A liquid that can be absorbed is brought into contact with the powder of the water-absorbing polymer disposed in the space between the two. As a result, the liquid can be absorbed by the water-absorbing polymer even at the entrance, and if it is subsequently dried, the water-absorbing polymer can be appropriately converted into the skeleton or the skeleton even in the voids constituting the entrance. It can be made to adhere to the surface of the adhesive which adhere | attaches each other.
In addition, the liquid contact process can mention the process of spraying the liquid which can absorb the powder of a water absorbing polymer toward the entrance from the exterior of a continuous porous layer, for example. Further, in the liquid contact process, a liquid different from the liquid moistening the skeleton in the entering process may be used.

  Furthermore, in any one of the methods for producing a water-retaining member, the entry step suppresses leakage of the water-absorbing polymer powder that has absorbed water together with the water-absorbing polymer powder to the outside of the continuous porous layer. It is preferable that the leakage suppressing material is a method for producing a water retention member that enters the void portion of the continuous porous layer.

  By allowing the leakage suppressing material to enter the void of the continuous porous layer together with the water absorbent polymer powder, the water absorbing polymer powder and the leakage suppressing material can be appropriately disposed in the void of the continuous porous layer. it can. Thereby, when the water-absorbing polymer absorbs water, it is possible to prevent the water-absorbing water-absorbing polymer from leaking out from the continuous porous layer. Therefore, water can be appropriately stored in the voids of the continuous porous layer.

Further, another aspect of the present invention is the method for producing any one of the water retention members, wherein the leakage suppressing material is a fiber, a clay mineral, or a thickener, and the disposing step includes the water absorbing property. a powder of polymer, and suppressing the leakage suppression member from the water-absorbing polymer which absorbs water from leaking to the outside of the continuous porous layer, the water retention treating agent comprising a mixture of water, the continuous porous layer It is a manufacturing method of the water retention member arrange | positioned in the said space | gap part.

In the production method of the present invention, a water retention agent formed by mixing a water-absorbing polymer powder, a leakage suppressing material, and water is disposed in the void portion of the continuous porous layer. This suppresses leakage of the absorbed water-absorbing polymer from the continuous porous layer to the outside, and appropriately maintains the state in which the absorbed water-absorbing polymer powder is disposed in the void of the continuous porous layer. Can do. Furthermore, even when the dried water-absorbing polymer absorbs water again after filling, it is possible to suppress the water-absorbing water-absorbing polymer from leaking out of the continuous porous layer. Therefore, water can be appropriately stored in the voids of the continuous porous layer.
In the production method of the present invention, in particular, the pore size of the void portion of the continuous porous layer is larger than the size when the water-absorbing polymer powder absorbs 100% of water that can be absorbed (diameter when assuming a spherical shape). It is effective in the case. Even when the pore diameter of the void portion is large as described above, it is possible to suppress the water-absorbing polymer powder that has absorbed water from leaking outside from the continuous porous layer by arranging the leakage suppressing material in the void portion of the continuous porous layer. It is.

Furthermore, in the method for producing the water retention structure, the disposing step includes the water retention treatment in which the water absorbent polymer powder absorbs water and has a size equal to or larger than the pore diameter of the void portion of the continuous porous layer. It is preferable to use a method for producing a water-retaining structure including a filling step in which an agent is pressed and filled into the gap.
If this manufacturing method is used, it is difficult for the water-absorbing polymer powder that has absorbed water to leak out from the voids of the continuous porous layer, so that the water-absorbing polymer powder that has absorbed water has filled the voids of the continuous porous layer, It can be maintained more appropriately.

  Furthermore, in any one of the above methods for producing a water-retaining member, the water-absorbing polymer may be a method for producing a water-retaining member including a water-absorbing polymer having temperature sensitivity.

  A water-absorbing polymer having temperature sensitivity maintains water absorption until its own temperature reaches a predetermined temperature (referred to as a temperature sensing point), and discharges water when the temperature sensing point is reached (water that has been absorbed is desorbed). Yes). Therefore, according to the production method of the present invention, the temperature-sensitive water-absorbing polymer can be disposed in the void portion of the continuous porous layer, so that the temperature of the water-retaining member (continuous porous layer) is water-absorbing. The water retention state (continuous porous layer) can be imparted with the property of keeping the water absorbed until the temperature sensitive point of the polymer is reached and discharging the water absorbed when the temperature sensitive point is reached.

  Furthermore, in any one of the above methods for producing a water-retaining member, the water-absorbing polymer may be a method for producing a water-retaining member containing a water-absorbing polymer whose main component is a modified acrylic cross-linked polymer.

  The modified acrylic cross-linked polymer has high water retention and salt resistance, and has a small decrease in absorption capacity due to repeated water absorption and drying. Therefore, according to the production method of the present invention, the water-absorbing polymer containing the modified acrylic cross-linked polymer as a main component can be disposed in the voids of the continuous porous layer. Can be applied to the continuous porous layer holder.

Also , a water-absorbing polymer powder that can be repeatedly absorbed and dried, a water-absorbing rate reducing agent that reduces the water-absorbing rate of the water-absorbing polymer powder, water, and foamed by mixing and foaming A water retention agent is preferred .

Further, the water-absorbing polymer powder capable of repeatedly performing drying and absorption water, after absorbing the absorption rate lowering agent to lower the water absorption rate of the water absorbent polymer powder, which was dried to a water absorption rate A foam-like water retention agent obtained by mixing and foaming a low-speed water-absorbing polymer powder, water, and a foaming agent is preferable .

The above-mentioned water retention agent is in the form of foam (for example, whipped cream). In this way, the water retention agent containing the water-absorbing water-absorbing polymer is made into a foam, thereby reducing the amount of water used, and the water retention agent containing the water-absorbing water-absorbing polymer in the voids of the continuous porous layer. Can be easily filled. Therefore, by drying this, the water-absorbing polymer can be appropriately attached to the surface of the skeleton of the continuous porous layer forming the void (including the surface when an adhesive that bonds the skeletons is included). .

In particular, since the water retention agent described above is in the form of foam, the amount of water filled in the voids of the continuous porous layer can be reduced as compared with the case where a liquid water retention agent is used. Thereby, since the water absorbing polymer which absorbed water can be dried in a short time, manufacture of a water retention member can be completed in a short time.

  Further, any one of the above foamy water retention treatment agents, wherein the water and the foaming agent are mixed and foamed by stirring, and the water absorbent polymer powder and the water absorption rate reducing agent are mixed, Or it is good to use the said low speed water-absorbing polymer powder as the foam-like water retention agent formed by mixing by foaming.

Aside from the water-absorbing polymer powder and the water-absorbing polymer powder, or the low-speed water-absorbing polymer powder, the foaming agent and water are mixed by foaming with stirring to improve foaming and increase its volume. Can do. Then, if this is mixed with water-absorbing polymer powder and water-absorption rate reducing agent, or low-speed water-absorbing polymer powder by stirring, a foamy water retention agent with good foaming and large volume can be obtained. Can do.
Since the above-mentioned foamy water retention treatment agent is a foamy water retention treatment agent produced as described above, it becomes a foamy water retention treatment agent with good foaming and a large volume. Therefore, if the above-mentioned foamy water retention treatment is filled in the voids of the continuous porous layer, the amount of water filled in the voids can be further reduced. Thereby, since the water absorbing polymer which absorbed water can be dried in a short time, manufacture of a water retention member can be completed in a short time.

  Furthermore, any one of the above-described foam-like water retention treatment agents may be used as the foam-like water retention treatment agent having a viscosity increased by mixing the viscosity imparting agent.

Since the above-mentioned foam-like water retention agent has increased viscosity due to the mixing of the viscosity-imparting agent, the foam can be prevented from bursting when it is filled in the voids of the continuous porous layer. Thereby, the foamy water retention agent can be more appropriately filled in the voids of the continuous porous layer.

  Furthermore, in any one of the above foamy water retention treatment agents, the water absorption rate reducing agent is preferably a hydrophilic foamy water retention treatment agent.

When a foam water retention treatment agent using a hydrophobic water absorption rate reducing agent is filled in the continuous porous layer, the hydrophobic water absorption rate reducing agent remains on the surface of the water absorbent polymer, and as a result, water absorption The water-absorbing ability of the conductive polymer may be impaired, and good water retention may not be imparted to the continuous porous layer holder.
On the other hand, in this foamy water retention agent, a hydrophilic water absorption rate reducing agent is used as the water absorption rate reducing agent. For this reason, after filling the foam-like water retention agent into the continuous porous layer, the hydrophilic water absorption rate reducing agent can be discharged to the outside of the continuous porous layer along with the rain water, etc. as time passes. Therefore, good water retention can be imparted to the continuous porous layer holder.

By the way, the water-absorbing polymer powder becomes sticky by absorbing the hydrophilic organic solvent, the water-absorbing polymers that have absorbed the hydrophilic organic solvent adhere to each other, and the particles of the water-absorbing polymer become large. It may be difficult to fill the voids of the continuous porous layer.
Therefore, when a hydrophilic organic solvent is used as the water absorption rate reducing agent, it is preferable to select a hydrophilic organic solvent that is difficult to be absorbed by the water-absorbing polymer powder according to the type of the water-absorbing polymer powder. Thereby, while being able to reduce the water absorption speed of water-absorbing polymer powder, water-absorbing polymer powder can be appropriately disperse | distributed in a foam-like water retention agent.

  Specifically, for example, when a water-absorbing polymer having a temperature sensitivity (such as a thermogel) is used as the water-absorbing polymer powder, it is preferable to use a polyhydric alcohol (such as ethylene glycol, glycerin or propylene glycol). In the case of using a water-absorbing polymer (such as Aqualic CS-6) containing a modified acrylic cross-linked polymer as a main component, it is preferable to use a monovalent alcohol (ethanol, methanol, propanol, etc.).

  In addition to the hydrophilic organic solvent that is hardly absorbed by the water-absorbing polymer powder, a small amount of a hydrophilic organic solvent that is easily absorbed by the water-absorbing polymer powder may be added as a water absorption rate reducing agent. In this way, it is possible to obtain the same effect of reducing the water absorption rate of the water-absorbing polymer powder with a small amount of water-absorption rate reducing agent, compared to the case of using only the hydrophilic organic solvent that is hardly absorbed by the water-absorbing polymer powder. it can. For example, when using a water-absorbing polymer having thermosensitivity (such as a thermogel) as the water-absorbing polymer powder, in addition to 10 parts by weight of glycerin that is difficult to absorb, 1 part by weight of ethanol that is easily absorbed may be added. good.

  Further, as a water absorption rate reducing agent, a small amount of a monovalent metal salt may be added in addition to a hydrophilic organic solvent that is hardly absorbed by the water-absorbing polymer powder. In this way, it is possible to obtain the same effect of reducing the water absorption rate of the water-absorbing polymer powder with a small amount of water-absorption rate reducing agent, compared to the case of using only the hydrophilic organic solvent that is hardly absorbed by the water-absorbing polymer powder. it can. For example, when using a water-absorbing polymer having thermosensitivity (such as a thermogel) as the water-absorbing polymer powder, 0.1 part by weight of a monovalent metal salt is added in addition to 10 parts by weight of glycerin that is difficult to absorb. Anyway. However, since the water absorption capacity of the water-absorbing polymer may be reduced due to the influence of the monovalent metal salt, it is preferable to add the monovalent metal salt in an extremely small amount, and the metal salt resistance is excellent. It is preferable to use a water-absorbing polymer powder (for example, thermogel).

  Furthermore, in any of the above foamy water retention treatment agents, the water-absorbing polymer powder is preferably a foamy water retention treatment agent having temperature sensitivity.

A water-absorbing polymer having temperature sensitivity maintains water absorption until its own temperature reaches a predetermined temperature (referred to as a temperature sensing point), and discharges water when the temperature sensing point is reached (water that has been absorbed is desorbed). Yes). For this reason, by filling the foam-like water retention agent in the continuous porous layer holder, the water absorption state is maintained until the temperature reaches the temperature sensing point of the water absorbent polymer, and when the temperature sensing point is reached. The property of discharging the absorbed water can be imparted to the continuous porous layer holder.
In addition, as a water-absorbing polymer powder having temperature sensitivity, for example, Thermogel (trade name, manufactured by Kojin Co., Ltd.) can be used.

  Furthermore, in any of the above foamy water retention treatment agents, the water-absorbing polymer powder is preferably a foamy water retention treatment agent containing a modified acrylic crosslinked polymer as a main component.

  The modified acrylic cross-linked polymer has high water retention and salt resistance, and has a small decrease in absorption capacity due to repeated water absorption and drying. For this reason, a high water retention property can be given to a continuous porous layer holder over a long period of time by filling this foam-like water retention agent in a continuous porous layer holder.

Further , a water retention agent that becomes a foamy water retention treatment agent by stirring and mixing with water, and is capable of repeatedly performing water absorption and drying, and the water absorption rate of the water absorbent polymer powder. A water retention agent comprising a mixture of a water absorption rate lowering agent that lowers water and a foaming agent separately from each other is preferable .

Further , a water retention agent that becomes a foamy water retention treatment agent by stirring and mixing with water, and is capable of repeatedly performing water absorption and drying, and the water absorption rate of the water absorbent polymer powder. A water retention agent comprising a water absorption rate reducing agent and a foaming agent that reduce the water content separately from each other is preferable .

Further , the water absorption rate of the water absorbent polymer powder is a water retention agent that becomes a foam water retention treatment agent by stirring and mixing with water, and capable of repeatedly performing water absorption and drying. A water retention agent comprising a low-speed water-absorbing polymer powder obtained by absorbing a water-absorption rate-reducing agent that lowers the water-absorbing rate and then drying it to reduce the water-absorption rate and a foaming agent is preferable .

The water retention agent described above comprises a mixture of a water absorbent polymer powder and a water absorption rate reducing agent and a foaming agent separately from each other. Alternatively, the water-absorbing polymer powder, the water absorption rate reducing agent and the foaming agent are provided separately from each other. Alternatively, the low-speed water-absorbing polymer powder and the foaming agent are provided separately from each other.
Therefore, separately from the water-absorbing polymer powder, the water-absorbing speed reducing agent, or the low-speed water-absorbing polymer powder, the foaming agent and water can be mixed and foamed by stirring. Thereby, foaming becomes favorable and the volume can be enlarged more. Thereafter, a mixture of the water-absorbing polymer powder and the water-absorption rate reducing agent, or a low-speed water-absorbing polymer powder mixed with stirring can be used to obtain a foamy water retention agent having good foaming and a large volume. it can. If such a foam-like water retention treatment is filled in the voids of the continuous porous layer, the amount of water filled in the voids can be further reduced. Thereby, since the water absorbing polymer which absorbed water can be dried in a short time, manufacture of a water retention member can be completed in a short time.

  Furthermore, any one of the above-mentioned water retention agents, preferably a water retention agent provided with a viscosity imparting agent separately.

Since the above-mentioned water retention agent is provided with a viscosity imparting agent separately from the above-described water retention agent components, the water-absorbing polymer powder and the water absorption rate reducing agent are mixed with stirring to obtain a foamy water retention treatment. If an agent is manufactured, the viscosity of a foam-like water retention agent can be raised. Thus, by increasing the viscosity of the foam-like water retention agent, the foam can be prevented from rupturing when filling the void in the continuous porous layer. Thereby, the foamy water retention agent can be more appropriately filled in the voids of the continuous porous layer.

  Furthermore, any one of the above water retention agents, wherein the water absorption rate reducing agent is preferably a hydrophilic water retention agent.

In the case of using a water retention agent mixed with a hydrophobic water absorption rate reducing agent, the hydrophobic water absorption rate reducing agent remains on the surface of the water-absorbing polymer even after filling the continuous porous layer. Thus, the water absorbing ability of the water absorbing polymer is impaired, and good water retention cannot be imparted to the continuous porous layer holder.
In contrast, in this water retention agent, a hydrophilic water absorption rate reducing agent is used as the water absorption rate reducing agent. For this reason, after filling the water retention agent into the continuous porous layer, with the passage of time, it is possible to discharge the hydrophilic water absorption rate reducing agent to the outside of the continuous porous layer along with rainwater, etc. Good water retention can be imparted to the continuous porous layer holder.

Next, embodiments of the present invention will be described with reference to the drawings.
Example 1
As shown in FIG. 1, the water retention member 100 of the first embodiment includes a continuous porous layer holding body 102 composed of a rectangular parallelepiped continuous porous layer 101. The continuous porous layer 101 is made of a known urethane foam, and has a skeleton 110 that forms a continuous pore-shaped void portion 103 in which a plurality of holes 104 are three-dimensionally connected as shown in FIG. A water-absorbing polymer 120 capable of repeatedly performing water absorption and drying is disposed inside the void portion 103 of the continuous porous layer 101.

  Specifically, in the water retention member 100 of the first embodiment, as shown in FIG. 2, the water-absorbing polymer 120 is partly or entirely not taken into the skeleton 110 of the continuous porous layer 101, 110 is disposed in the gap 103 while adhering to the surface 110b of the 110. Thereby, when the water-absorbing polymer 120 absorbs water, the skeleton 110 does not prevent the swelling due to water absorption, so that the original characteristics of the water-absorbing polymer 120 can be fully exhibited and water can be absorbed appropriately.

  By the way, when the water-absorbing polymer 120 is attached to the surface 110b of the skeleton 110 of the continuous porous layer 101 using another member (such as an adhesive), the influence of the other member (such as an adhesive) There is a possibility that the water absorption capacity of the water absorbent polymer 120 may be reduced. In contrast, in the water retention member 100 of the first embodiment, the water absorbent polymer 120 that has absorbed the liquid (water in the first embodiment) is in contact with the skeleton 110 of the continuous porous layer 101 (see FIG. 7). The water-absorbing polymer 120 is adhered to the skeleton surface 110b. Thereby, since the water absorption capability of the water absorbing polymer 120 is not lowered, a sufficient water retention amount can be ensured. In addition, by attaching the water-absorbing polymer 120 to the skeleton 110 in this manner, it is possible to prevent the water-absorbing polymer 120 from falling off from the inside of the continuous porous layer 101.

For example, as shown in FIG. 3, the water retention member 100 of the first embodiment can be disposed on the base portion 165 of the artificial turf 160 to form the water retention artificial turf 150.
By the way, the water-absorbing polymer 120 has temperature sensitivity (in Example 1, the temperature sensitive point is 35 ° C.). For this reason, when the water retention artificial turf 150 provided with the water retention member 100 is provided, for example, on the roof of a building, the water retention member 100 is heated during fine weather in summer and the temperature of the water absorbent polymer 120 is 35 ° C. If it rises exceeding it, the water stored in the water-absorbing polymer 120 will be drained and evaporated. The temperature of the water retention artificial turf 150 can be lowered by the heat of vaporization of water required at this time. On the other hand, when it rains, the water-retaining member 100 is cooled and the temperature of the water-absorbing polymer 120 is lowered to 35 ° C. or lower, so that the water-absorbing polymer 120 can absorb water to store water.

Next, the manufacturing method of the water retention member 100 of the first embodiment will be described.
First, the water-retaining treatment agent 40 was produced by mixing the water-absorbing polymer powder 120c, glycerin (corresponding to a water absorption rate reducing agent) and water in a ratio of 1: 30: 126 (weight ratio). Specifically, as shown in FIG. 4, the water-absorbing polymer powder 120 c and glycerin were mixed in the container 25 at a ratio of 1:30 (weight ratio) to obtain the water retaining agent 20. In Example 1, thermogel (trade name, manufactured by Kojin Co., Ltd.) having a particle size of 0.3 mm or less is used as the water-absorbing polymer powder 120c. This thermogel is a water-absorbing polymer powder having high water retention (1 g of thermogel absorbs 100 to 150 g of water) and temperature sensitivity (in this example 1, the temperature sensitive point is 35 ° C.). Next, as shown in FIG. 5, the water retaining agent 20 and the water W are mixed in a container 45 at a ratio of 31: 126 (weight ratio) to form a liquid (fluid) water retaining agent 40. Got.

(Arrangement process)
Next, in the disposing step, the water-absorbing polymer 120 that has absorbed water is disposed in the void 103 of the continuous porous layer 101.
Specifically, first, in the infiltration step, the water retention agent 40 was infiltrated into the void 103 of the continuous porous layer 101. Specifically, as shown in FIG. 6, the continuous porous layer holder 102 made of urethane foam was immersed in the water retention agent 40 in the container 45. Next, the continuous porous layer 10 made of urethane foam was compressed and then restored. As a result, the water retention agent 40 could be efficiently and appropriately infiltrated into the void 103 of the continuous porous layer 101. In particular, the water retention agent 40 of Example 1 is excellent in fluidity because it contains only the water-absorbing polymer powder 120c, glycerin (corresponding to a water absorption rate reducing agent), and water. For this reason, the water retention agent 40 was able to easily enter the gap 103 of the continuous porous layer 101 in a short time.

  By the way, the water-absorbing polymer powder 120c has a high water absorption speed. Therefore, when it is simply mixed with water, the water-absorbing polymer powder 120c swells rapidly due to water absorption simultaneously with the mixing with water. . Therefore, immediately after mixing the water-absorbing polymer powder 120c and water, even if the mixture of the water-absorbing polymer powder 120c and water starts to enter the void 103 of the continuous porous layer 101, The water-absorbing polymer powder 120c swells greatly due to water absorption and becomes larger than the pores 104 of the continuous porous layer 101, so that the water-absorbing polymer powder 120c that has absorbed water enters the void 103 of the continuous porous layer 101. There is a risk that it will not be possible. Further, before the continuous porous layer 101 starts to enter the gap 103, the water-absorbing polymer powder 120c swells larger than the holes 104 of the continuous porous layer 101, and the water-absorbing polymer powder 120c that has absorbed water enters. There is a risk that it will not be possible.

  On the other hand, the water retention treatment agent 40 of Example 1 mixed the water-absorbing polymer powder 120c with glycerin (corresponding to a water-absorption rate reducing agent) to reduce the water absorption rate of the water-absorbing polymer powder 120c, Mixed with water W. This can reduce the swelling speed of the water-absorbing polymer powder 120c due to water absorption, so that the water retention agent 40 of Example 1 can enter the void 103 of the continuous porous layer 101 (water absorption is performed). The size of the water-absorbing polymer powder 120c was smaller than the pores 104 of the continuous porous layer 101). For this reason, in the present Example 1, the water retention agent 40 could be appropriately infiltrated into the void 103 of the continuous porous layer 101.

  Thereafter, the process proceeded to the water absorption step, and the continuous porous layer holding body 102 was left immersed in the water retention agent 40 for a predetermined time. As a result, water absorption by the water-absorbing polymer powder 120c proceeds, so that the water-absorbing (gel-like) water-absorbing polymer 120b is disposed in the void 103 of the continuous porous layer 101 as shown in FIG. We were able to. Whether or not the water-absorbing polymer 120 has gelled by water absorption can be confirmed by observing the water retention agent 40 located outside the continuous porous layer holder 102.

(Adhesion process)
Next, the continuous porous layer holding body 102 provided with the water-absorbing water-absorbing polymer 120 b in the gap 103 was taken out from the container 45. Thereafter, by drying this, the water-absorbing (gel-like) water-absorbing polymer 120b disposed in the gap 103 was dried. At this time, as shown in FIG. 7, the water-absorbing (gel-like) water-absorbing polymer 120 b can be dried while being in contact with the surface 110 b of the skeleton 110 in the gap 103. Thereby, as shown in FIG. 2, the dried water-absorbing polymer 120 can be attached to the surface 110 b of the skeleton 110 in the void 103 of the continuous porous layer 101. In this manner, the water retention member 100 of Example 1 is completed.

  According to such a production method, unlike the conventional production methods (see Patent Documents 1 and 2), part or all of the water-absorbing polymer is not taken into the skeleton of the continuous porous layer, and the skeleton The water-absorbing polymer is not bonded to the skeleton with an adhesive that bonds them together. Therefore, when the water-absorbing polymer 120 absorbs water, the skeleton or the adhesive does not prevent the water-absorbing swelling, so that the original characteristics of the water-absorbing polymer 120 can be fully exhibited and water can be absorbed appropriately. . Therefore, according to the production method of the present invention, it is possible to obtain a water retention member capable of securing a sufficient water retention amount.

  In addition, after taking out the continuous porous layer holding body 102 immersed in the water retention agent 40 from the inside of the container 45, a gelling accelerator (for example, a viscosity mineral such as attapulgite) is applied to the surface of the continuous porous layer holding body 102. It is good to apply. As a result, the water-absorbing water-absorbing polymer 120 comes into contact with the gelation accelerator on the surface of the continuous porous layer holder 102 (continuous porous layer 101) and the vicinity thereof, and quickly gels (loses fluidity). Therefore, the water absorbing polymer 120 located in the continuous porous layer 101 can be prevented from leaking out from the continuous porous layer 101.

In addition, since glycerin contained in the water retention agent 40 is hydrophilic, it is discharged to the outside of the continuous porous layer 101 together with rainwater and the like as time passes. For this reason, there is no possibility that the high water absorption capability of the water absorbent polymer 120 is impaired due to the influence of glycerin, and there is no possibility that the continuous porous layer 101 cannot be provided with good water retention. Moreover, glycerin is preferable because it does not contaminate the natural environment.
As mentioned above, according to the manufacturing method of the present Example 1, the water retention member 100 which can ensure sufficient water retention amount can be manufactured.

(Example 2)
The water retention member 200 of Example 2 is different from the water retention member 100 of Example 1 in the continuous porous layer (continuous porous layer holder). Specifically, as shown in FIG. 8, the water retention member 200 of Example 2 includes a continuous porous layer 201 (a continuous porous layer holder 202) made of a fiber structure. The continuous porous layer 201 is a fiber structure in which polypropylene fibers are entangled and formed into a three-dimensional network shape such as a dried fiber of loofah. In Example 2, hetimalon (made by Shinko Nylon Co., Ltd., trade name) is used as the continuous porous layer 201.

  As shown in FIG. 9, the skeleton 210 (polypropylene fiber) of the continuous porous layer 201 forms a continuous pore-shaped void 203 in which a plurality of holes 204 are three-dimensionally connected. As in the first embodiment, a water-absorbing polymer 120 capable of repeatedly performing water absorption and drying is disposed inside the gap 203. Specifically, the water-absorbing polymer 120 is disposed in the void 203 in a state where a part or all of the water-absorbing polymer 120 is attached to the surface 210 b of the skeleton 210 without being taken into the skeleton 210 of the continuous porous layer 201. . Thereby, when the water-absorbing polymer 120 absorbs water, the skeleton 210 does not prevent the water-absorbing swelling, so that the original characteristics of the water-absorbing polymer 120 can be fully exhibited and water can be appropriately absorbed.

  Furthermore, in the water retention member 200 of the second embodiment, the water absorbing polymer 120b that has absorbed water is dried while being in contact with the skeleton 210 of the continuous porous layer 201 (see FIG. 10). The polymer 120 is attached to the surface 210 b of the skeleton 210. By adhering in this way, the water absorption capacity of the water absorbent polymer 120 is not lowered, so that a sufficient water retention amount can be ensured. In addition, it is possible to prevent the water-absorbing polymer 120 from dropping from the inside of the continuous porous layer 201.

Next, the manufacturing method of the water retention member 200 of the second embodiment will be described.
(Arrangement process)
First, in the disposing step, the water-absorbing polymer 120 that has absorbed water is disposed in the void 203 of the continuous porous layer 201.
Specifically, first, in the infiltration step, the water retention agent 40 was infiltrated into the voids 203 of the continuous porous layer 201. Specifically, as shown in FIG. 6, the continuous porous layer holding body 202 made of a fiber structure was immersed in the water retention agent 40 in the container 45. As a result, the water retention agent 40 was able to enter the gap 203 of the continuous porous layer 201.

  Thereafter, the process proceeds to a water absorption step, and the continuous porous layer holder 202 is left immersed in the water retention agent 40 for a predetermined time. As a result, as shown in FIG. 10, the water-absorbing (gel-like) water-absorbing polymer 120 b was placed in the gap 203 of the continuous porous layer 201. Whether or not the water-absorbing polymer 120 has gelled by water absorption can be confirmed by observing the water retention agent 40 located outside the continuous porous layer holder 202.

(Adhesion process)
Next, the water-absorbing polymer 120 was attached to the surface 210 b of the skeleton 210 in the void 203 of the continuous porous layer 201 in the same manner as in the attachment step of Example 1.
Specifically, first, the continuous porous layer holding body 202 (see FIG. 10) provided with the water-absorbing water-absorbing polymer 120b in the gap 203 was taken out from the container 45. After that, by drying this, the water-absorbing water-absorbing polymer 120b disposed in the gap 203 was dried. At this time, as shown in FIG. 10, the water-absorbing water-absorbing polymer 120 b can be dried while being in contact with the surface 210 b of the skeleton 210 in the gap 203. As a result, as shown in FIG. 9, the dried water-absorbing polymer 120 can be attached to the surface 210 b of the skeleton 210 within the void 203 of the continuous porous layer 201. In this way, the water retention member 200 of Example 2 is completed.

  Even in the production method of Example 2, part or all of the water-absorbing polymer is not taken into the skeleton of the continuous porous layer, and the water-absorbing polymer is bonded to the skeleton with an adhesive that bonds the skeletons to each other. It never happens. Therefore, when the water-absorbing polymer 120 absorbs water, swelling due to water absorption is not hindered by the skeleton 210 or the like, so that the original characteristics of the water-absorbing polymer 120 can be fully exhibited and water can be appropriately absorbed. Therefore, according to the manufacturing method of the second embodiment, it is possible to obtain the water retention member 200 capable of securing a sufficient water retention amount.

(Modification 1)
In the first modification, the water retention member 200 was manufactured using a water retention treatment agent different from that in the second embodiment.
Specifically, unlike Example 2, first, a water retention agent separately (not mixed) with water-absorbing polymer powder, glycerin, a viscosity imparting agent, and calcium hydroxide (polyvalent metal salt) was prepared.
Next, unlike Example 2, in the pre-intrusion polyvalent metal salt arrangement step, an aqueous solution of calcium hydroxide (an aqueous solution of the polyvalent metal salt) contained in the water retention agent is used as the entrance surface 201b of the continuous porous layer 201. It was applied to the surface excluding. Thereby, calcium hydroxide (polyvalent metal salt) can be disposed on the surface (side surface and bottom surface in FIG. 8) excluding the inlet surface 201b of the continuous porous layer 201 and in the vicinity thereof.

Next, unlike Example 2, a water-absorbing polymer powder, glycerin (corresponding to a water absorption rate reducing agent), and a viscosity imparting agent (corresponding to a water absorption rate reducing agent and a gelling agent) contained in the water retention agent The water retention agent was produced by mixing with water. Specifically, the water-absorbing polymer powder, glycerin, water, and a viscosity imparting agent were mixed at a ratio of 1: 1: 149: 0.3 (weight ratio).
In the first modification, as in Example 2, a thermogel having a particle size of 0.3 mm or less (trade name, manufactured by Kojin Co., Ltd.) is used as the water-absorbent polymer powder. In addition, CMC Daicel (trade name) manufactured by Daicel Chemical Industries, which has sodium carboxymethylcellulose as a main component, is used as a viscosity imparting agent.

Subsequently, the process proceeded to an infiltration process, and the water retention agent was injected into the void 203 of the continuous porous layer 201 from the intrusion surface 201b of the continuous porous layer 201.
By the way, in the first modification, as described above, the surface excluding the inlet surface 201b of the continuous porous layer 201 in the pre-filling polyvalent metal salt arranging step (see FIG. Calcium hydroxide (polyvalent metal salt) is disposed on the bottom surface and in the vicinity thereof. For this reason, when a water retention agent containing sodium carboxymethylcellulose (an anionic water-soluble polymer) is injected into the void 203 of the continuous porous layer 201 in the infiltration step, the entrance surface 201b of the continuous porous layer 201 is On the removed surface and in the vicinity thereof, the water retention agent reacts with calcium hydroxide and gels (loses fluidity). This is because the anionic water-soluble polymer has a property of cross-linking by reaction with a polyvalent metal salt to form a gel. Thereby, it can suppress that the water absorbing polymer 120 leaks out from the continuous porous layer 201 outside.

Next, in the post-filling polyvalent metal salt arranging step, an aqueous calcium hydroxide solution was sprayed on the intrusion surface 201 b of the continuous porous layer 201. Thereby, calcium hydroxide (polyvalent metal salt) can be disposed on the inlet surface 201b of the continuous porous layer 201 and in the vicinity thereof. For this reason, the water retention agent containing sodium carboxymethylcellulose reacts with calcium hydroxide and loses fluidity at the inlet surface 201b of the continuous porous layer 201 and in the vicinity thereof. Thereby, it is possible to prevent the water-absorbing polymer 120 from leaking outside from the entrance surface 201b of the continuous porous layer 201.
In this way, as shown in FIG. 10, the water-absorbing (gel-like) water-absorbing polymer 120 b was placed in the gap 203 of the continuous porous layer 201.

  Then, it progressed to the adhesion | attachment process, and the continuous porous layer 201 which has arrange | positioned the water absorbing polymer 120b which absorbed water in the space | gap part 203 was dried similarly to Example 2. FIG. As a result, as shown in FIG. 9, the dried water-absorbing polymer 120 can be attached to the surface 210 b of the skeleton 210 within the void 203 of the continuous porous layer 201. In the first modification, the water retention member 200 was manufactured in this way.

  In addition, since glycerin and CMC dicel (viscosity imparting agent) contained in the water retention agent are hydrophilic, they are discharged to the outside of the continuous porous layer together with water or the like with the passage of time. For this reason, there is no possibility that the high water absorption capability of the water absorbing polymer 120 is impaired due to the influence of glycerin and CMC Daicel, and there is no possibility that the continuous porous layer 201 cannot be provided with good water retention.

(Example 3)
The water retention member 300 of Example 3 is different from the water retention member 100 of Example 1 in the continuous porous layer (continuous porous layer holder). Specifically, as shown in FIG. 11, the water retention member 300 of Example 3 includes a continuous porous layer 301 (a continuous porous layer holder 302) made of a fiber structure. The continuous porous layer 301 is a fiber structure formed by processing a coconut fiber into a three-dimensional network using an adhesive. In Example 3, as the continuous porous layer 301, a sucking prevention material palm fiber (trade name, manufactured by Toyo Cushion Co., Ltd.) is used.

  As shown in FIG. 12, the skeleton 310 of the continuous porous layer 301 constitutes a continuous pore-shaped void portion 303 in which a plurality of holes 304 are three-dimensionally connected. As in the first embodiment, a water-absorbing polymer 320 capable of repeatedly performing water absorption and drying is disposed inside the gap portion 303. Specifically, a part or the whole of the water-absorbing polymer 320 is not adhered to the skeleton 310 with an adhesive 315 that adheres the skeletons 310 to each other, and is attached to the surface 310b of the skeleton 310 in the gap 303. Has been placed. Thereby, when the water-absorbing polymer 320 absorbs water, the adhesive 315 does not prevent the water-absorbing swelling, so that the original characteristics of the water-absorbing polymer 320 can be sufficiently exerted to absorb water appropriately. .

  Furthermore, in the water retention member 300 of Example 3, the water-absorbing polymer 320b that absorbed the liquid was dried while being in contact with the skeleton 310 or the adhesive 315 of the continuous porous layer 301 (see FIG. 17). Thus, the water-absorbing polymer 320 is attached to the surface 310b of the skeleton 310 or the surface of the adhesive 315. By adhering in this way, the water absorption capacity of the water absorbent polymer 320 is not lowered, so that a sufficient water retention amount can be ensured. In addition, the water-absorbing polymer 320 can be prevented from falling off from the inside of the continuous porous layer 301.

For example, as shown in FIG. 13, the water retention member 300 of the third embodiment can be disposed on the bottom portion 365 of the planter 360 to form the water retention planter 350.
By the way, the water-absorbing polymer 320 has temperature sensitivity (in Example 3, the temperature sensitive point is 30 ° C.). For this reason, when the water retention planter 350 provided with the water retention member 300 is disposed, for example, on the veranda of an apartment, the water retention member 300 is heated during fine weather in summer, and the temperature of the water absorbent polymer 320 exceeds 30 ° C. The water stored in the water absorbent polymer 320 is drained and evaporated. Due to the heat of vaporization of water required at this time, the water retention planter 350 and the ambient temperature can be lowered. At this time, a part of the water discharged from the water-absorbing polymer 320 can also be given to the plant cultivated by the water retention planter 350. On the other hand, when watering, the water retaining member 300 is cooled and the temperature of the water absorbent polymer 320 is lowered to 30 ° C. or lower, so that the water can be stored by the water absorbent polymer 320 absorbing water.

Next, the manufacturing method of the water retention member 300 of the third embodiment will be described.
(Arrangement process)
First, in the disposing step, the water-absorbing water-absorbing polymer 320 was disposed in the void portion 303 of the continuous porous layer 301.
Specifically, first, as shown in FIG. 14, a portion of the continuous porous layer 301 excluding the entry portion 301 b that constitutes the entrance 303 b that allows the water absorbent polymer powder 320 c to enter in the subsequent entry step, Immerse in water W. Thereafter, the continuous porous layer 301 (continuous porous layer holder 302) was taken out of the water W. Thereby, the site | part except the entrance part 301b among the continuous porous layers 301 can be moistened with the water W. FIG.

Next, the process proceeds to an entry step, and as shown in FIG. 15, the water-absorbing polymer powder 320 c is sprayed from above the entrance 303 b of the continuous porous layer 301. As a result, the water-absorbing polymer powder 320c was able to enter the void 303 of the continuous porous layer 301 through the entrance 303b. In particular, in Example 3, the entrance portion 301b of the continuous porous layer 301 (the portion constituting the entrance 303b of the adhesive 310 that bonds the skeleton 310 and the skeleton 310) is not wet with water, Water-absorbing polymer powder 320c was sprayed from above the entrance 303b. As a result, the water absorbing polymer powder 320c absorbs water at the entrance 303b and swells and prevents the entrance 303b from being blocked, and the water absorbent polymer powder 320c appropriately enters the gap 303. I was able to.
In Example 3, as in Example 1, a thermogel (trade name, manufactured by Kojin Co., Ltd.) having a particle size of 0.3 mm or less is used as the water-absorbing polymer powder 320c.

  Next, the process proceeds to the water absorption step, and as shown in FIG. 16, after the ethanol ET is sprayed on the entry portion 301b of the continuous porous layer 301, the continuous porous layer 301 (continuous porous layer holding body 302) for a predetermined time. Left unattended. Thereby, among the water-absorbing polymer powder 320c that has entered the void portion 303, the water-absorbing polymer powder 320c that has passed through the entry portion 301b of the continuous porous layer 301 and remains in contact with the skeleton 310 or the adhesive 315 wet with water, In this state, water was absorbed. On the other hand, among the water-absorbing polymer powder 320c that entered the void portion 303, the one that remained in the entry portion 301b of the continuous porous layer 301 quickly absorbed ethanol ET sprayed later. As a result, as shown in FIG. 17, the water-absorbing polymer 320 b that absorbed the liquid could be placed in the void 303 of the continuous porous layer 301.

  As described above, in Example 3, ethanol ET was sprayed on the entry portion 301b of the continuous porous layer 301 (see FIG. 16). However, the liquid sprayed on the entry portion 301b of the continuous porous layer 301 is not limited to ethanol, and any liquid that can be absorbed by the water-absorbing polymer powder 320c (for example, water) may be used. By spraying a liquid that can be absorbed by the water-absorbing polymer powder 320c, the liquid can be absorbed by the water-absorbing polymer powder 320c remaining in the entry portion 301b of the continuous porous layer 301. Thereby, the water absorbing polymer 320b which absorbed the liquid can be made into the state arrange | positioned in the space | gap part 303 of the continuous porous layer 301 (refer FIG. 17).

(Adhesion process)
Next, the water-absorbing polymer 320 was attached to the surface 310 b of the skeleton 310 or the surface of the adhesive 315 in the gap 303 of the continuous porous layer 301.
Specifically, the continuous porous layer holding body 302 (see FIG. 17) provided with the water-absorbing polymer 320b that absorbed the liquid in the gap 303 was dried. At this time, the water-absorbing polymer 320b that has absorbed the liquid can be dried in a state where it is in contact with the surface 310b of the skeleton 310 or the surface of the adhesive 315 in the gap 303. As a result, as shown in FIG. 12, the dried water-absorbing polymer 320 can be attached to the surface 310 b of the skeleton 310 or the surface of the adhesive 315 in the gap 303 of the continuous porous layer 301. In this way, the water retention member 300 of Example 3 is completed.

  Even in the manufacturing method of the third embodiment, part or all of the water-absorbing polymer 320 is not taken into the skeleton 310 of the continuous porous layer 301, and the water-absorbing polymer 315 is bonded with the adhesive 315 that bonds the skeletons 310 to each other. 320 is not bonded to the skeleton 310. Therefore, when the water-absorbing polymer 320 absorbs water, the skeleton 310 or the adhesive 315 does not prevent the water-absorbing swelling, so that the original characteristics of the water-absorbing polymer 320 can be fully exhibited to absorb water appropriately. Can do. Therefore, according to the manufacturing method of the third embodiment, it is possible to obtain the water retention member 300 capable of securing a sufficient water retention amount.

(Example 4)
Next, another manufacturing method of the water retention member 300, which is different from the manufacturing method of Example 3, will be described. In Example 4 as well, as in Example 3, as the continuous porous layer 301, a suck-out preventing material palm fiber (trade name, manufactured by Toyo Cushion Co., Ltd.) is used.
First, the water retention agent which prepared separately the water absorbing polymer powder 320c, glycerin, a foaming agent, and a viscosity imparting agent was prepared. In Example 4, Alanon AEL (manufactured by Kawaken Fine Chemicals, trade name) is used as the foaming agent. In addition, CMC Daicel (manufactured by Daicel Chemical Industries, trade name) is used as a viscosity imparting agent.

  Next, the water-absorbing polymer powder 320c, glycerin, foaming agent, viscosity-imparting agent, and water are mixed at a ratio of 5: 9: 0.5: 2: 400 (weight ratio) to obtain a foamy water retention treatment agent. 440 was produced. Specifically, as shown in FIG. 18, the foaming agent and water are charged into the container 445 at a ratio of 0.5: 400 (weight ratio), and stirred by a stirrer 450 to obtain a foam-like shape. did. Moreover, as shown in FIG. 19, the water-absorbing polymer powder 320c, glycerin, and a viscosity imparting agent were mixed in a container 425 at a ratio of 5: 9: 2 (weight ratio) to obtain a water retention agent 420. . Next, as shown in FIG. 20, this water retention agent 420 was put into a container 445 and stirred by a stirrer 450 to obtain a foamy water retention treatment agent 440 foamed in a whipped cream shape.

  In Example 4, the foaming agent and water are mixed by stirring separately from the water-absorbing polymer powder 320c, glycerin, and the viscosity-imparting agent. Thereby, foaming became favorable and the volume of the foamy water retention agent 440 could be increased to about 3 times the volume of the mixed water or the like.

(Arrangement process)
Next, in the disposing step, the water-absorbing polymer 320 that has absorbed water is disposed in the gap 303 of the continuous porous layer 301. The continuous porous layer 301 has outer dimensions of 30 cm in length, 30 cm in width, and 1 cm in thickness (see FIG. 11).
Specifically, first, in the filling step, the water retention agent 440 was filled into the voids 303 of the continuous porous layer 301. Specifically, as shown in FIG. 21, first, a container 461 having an inner dimension of 30 cm in length, 30 cm in width, and 3 cm in height and comprising four side wall plates 462 and a wire mesh bottom 463, and 30 cm in length × width A filling device 460 provided with a 30 cm pressing plate 465 was prepared.

  Next, as shown in FIG. 22, the continuous porous layer 301 is disposed in the container 461, and the foam water retention agent 440 is further applied to the entire surface 301 c of the continuous porous layer 301 in the container 461. The thickness was about 1 cm. Next, the pressing plate 465 was caused to enter the container 461 from above the container 461, and the foamy water retention agent 440 was pressed downward. As a result, the air in the void portion 303 of the continuous porous layer 301 is discharged from the hole 463b of the bottom portion 463 of the container 461 to the outside, and the foamy water retention agent 440 is discharged into the void portion 303 of the continuous porous layer 301. Can enter. Thereafter, when the pressing plate 465 is moved downward until the pressing plate 465 contacts the surface 301 c of the continuous porous layer 301, part of the foamy water retention agent 440 leaks from the hole 463 b of the bottom 463 of the container 461. did. Thereby, it was confirmed that the water retention agent 440 was filled throughout the void 303 of the continuous porous layer 301.

  In particular, in Example 4, since the foam water retention agent 440 whose viscosity is increased by mixing the viscosity imparting agent is used, the foam water retention agent 440 is filled in the gap 303 of the continuous porous layer 301. It was possible to suppress the foam from bursting due to the pressure at the time or contact with the skeleton 310 of the continuous porous layer 301 or the like. Thereby, the foam-like water retention agent 440 was able to be appropriately filled throughout the void portion 303 of the continuous porous layer 301.

As described above, in Example 4, the water retention agent containing the water-absorbing polymer that has absorbed water is made into a foam, thereby reducing the amount of water used and absorbing water in the voids of the continuous porous layer. The water retention agent 440 containing the conductive polymer 320 could be easily filled throughout the void 303 of the continuous porous layer 301.
Furthermore, as shown in FIG. 23, by filling the entire inside of the void portion 303 of the continuous porous layer 301 with the water retention agent 440, the skeleton 310 (insulator of the insulator) forming the void portion 303 is formed. The foam-like water retention agent 440 containing the water-absorbing water-absorbing polymer 320 could be brought into contact over the entire surface 310b of the (actual fiber).

(Adhesion process)
Next, the water-absorbing polymer 320 was attached to the surface 310 b of the skeleton 310 or the surface of the adhesive 315 in the gap 303 of the continuous porous layer 301.
Specifically, the continuous porous layer holder 302 provided with the water-absorbing water-absorbing polymer 320 in the gap 303 was dried with hot air. At this time, the water-absorbing polymer 320 that has absorbed water can be dried while contacting the surface 310b of the skeleton 310 or the surface of the adhesive 315 in the gap 303 (see FIG. 23). As a result, as shown in FIG. 12, the dried water-absorbing polymer 320 can be attached to the surface 310 b of the skeleton 310 or the surface of the adhesive 315 in the gap 303 of the continuous porous layer 301. In this way, a water retention member 300 similar to that of Example 3 is completed.

  In particular, in Example 4, since the foam-like water retention agent 440 is used, the amount of water filled in the voids 303 of the continuous porous layer 301 compared to the case where a liquid water retention agent is used. Can be reduced. Thereby, since the water absorbing polymer 320 which absorbed water can be dried in a short time, manufacture of the water retention member 300 was able to be completed in a short time.

(Modification 2)
In Example 4, the water-absorbing polymer powder 320c, glycerin, a foaming agent, a viscosity imparting agent, and water were mixed to produce a foamy water retention agent 440.
On the other hand, in this modification 2, the foamy water retention agent was manufactured as follows. First, ethanol (2 parts by weight) was absorbed into the water-absorbing polymer powder 320c (1 part by weight). Next, this was dried and then pulverized to obtain a low-speed water-absorbing polymer powder. Thereafter, as in Example 4, the foaming agent and water were stirred to form a foam, and the low-speed water-absorbing polymer powder and the viscosity-imparting agent were mixed by stirring to foam into a whipped cream. A foamy water retention agent was obtained.
In the same manner as in Example 4, the foam-like water retention agent of Modification 2 is filled in the voids 303 of the continuous porous layer 301 and then dried, whereby the water retention member 300 (see FIGS. 11 and 12). )

(Example 5)
As shown in FIG. 24, the water retention member 500 of the fifth embodiment includes a continuous porous layer holding body 502 composed of a substantially plate-like continuous porous layer 501. The continuous porous layer 501 is a fiber structure in which a polypropylene wire is formed into a three-dimensional network structure, and a skeleton 510 (polypropylene) that forms a continuous pore-shaped void portion 503 in which a plurality of holes 504 are three-dimensionally connected. Wire). A water-absorbing polymer 520 capable of repeatedly performing water absorption and drying is disposed inside the void portion 503 of the continuous porous layer 501 (see FIG. 25).

  Specifically, in the water retention member 500 of the fifth embodiment, as shown in FIG. 25 which is an enlarged view of the D part in FIG. 24, a part or all of the water absorbent polymer 520 is a skeleton of the continuous porous layer 501. It is arranged in the gap 503 without being taken into 510. Thereby, when the water-absorbing polymer 520 absorbs water, the skeleton 510 does not prevent the water-absorbing swelling, so that the original characteristics of the water-absorbing polymer 520 can be fully exhibited and water can be absorbed appropriately. In addition, since the water-absorbing polymer 520 is attached to the surface of the rock wool 525 (corresponding to the leakage inhibitor) disposed over the entire void portion 503 of the continuous porous layer 501, the inside of the continuous porous layer 501 It is also possible to prevent the water-absorbing polymer 520 from falling off.

In particular, in the water retention member 500 of the fifth embodiment, rock wool 525 (fiber) is used as a leakage inhibitor. For this reason, it is possible to suppress leakage of the water-absorbing polymer 520b that has absorbed water over a long period of time from the continuous porous layer 501 to the outside. Therefore, water can be stored more appropriately in the void portion 503 of the continuous porous layer 501.
In Example 5, a water-absorbing polymer having temperature sensitivity is used as the water-absorbing polymer 520. Specifically, four types of water-absorbing polymers having different temperature points (specifically, temperature points of 20 ° C., 25 ° C., 30 ° C., and 35 ° C.) are used in a 1: 2: 4: 3 (weight ratio). A water-absorbing polymer mixed at a ratio of

  In the water retention member 500 of the fifth embodiment, for example, a lawn T can be planted as shown in FIG. The lawn T grows by absorbing water stored in the water-absorbing polymer 520 located in the gap portion 503 of the water retention member 500. For example, as shown in FIG. 27, the water retention member 500 in which the lawn T is planted can be disposed on the roof S1 or the balconies S2 and S3 of the building BU.

  By the way, the water-absorbing polymer 520 located in the void portion 503 of the water-retaining member 500 has temperature sensitivity (four types of temperature sensitive points: 20 ° C., 25 ° C., 30 ° C., and 35 ° C.). For this reason, in this building BU, when the water-retaining member 500 is heated and the temperature of the water-absorbing polymer 520 rises above 20 ° C., for example, in fine weather such as summer, the water-absorbing polymer 520 is stored in the whole. At least a part of the water was discharged and evaporated. The temperature of the building BU can be lowered by the heat of vaporization of water required at this time. Moreover, since the lawn T is planted in the water-retaining member 500, the building BU can be cooled by the heat of vaporization of water evaporated from the lawn T, and the atmosphere can be purified, which is preferable. At this time, a part of the water discharged from the water-absorbing polymer 520 can be given to the lawn T. On the other hand, at the time of rain, the water retaining member 500 is cooled by rain water, and the temperature of the water absorbent polymer 520 is lowered to 35 ° C. or lower, so that the water absorbent polymer 520 can store water by absorbing rain water.

Next, the manufacturing method of the water retention member 500 of the fifth embodiment will be described.
First, the water-retaining treatment agent 540 was manufactured by mixing the water-absorbing polymer 520 powder, water W, and rock wool 525 at a ratio of 2: 200: 4.5 (weight ratio). Specifically, first, the water absorbent polymer 520 powder and rock wool 525 were mixed at a ratio of 2: 4.5 (weight ratio) to obtain a mixture. Thereafter, as shown in FIG. 24, 200 parts by weight of water W was added to 6.5 parts by weight of the mixture, and the mixture was stirred and mixed with a stirrer 450 to obtain a water retention agent 540.

  By the way, in the present Example 5, the water retention agent 540 is manufactured by mixing rock wool 525 (fiber). By mixing rock wool 525 (fiber), the water-absorbing polymer 520 is left in a state of being left in place (in the water retention agent 540, powders of the water-absorbing polymer 520 adhere to each other to form a lump). be able to. Therefore, it becomes easy to fill the water retention agent 540 in the void portion 503 of the continuous porous layer 501. Furthermore, if the water retention agent 540 is filled in the voids 503 of the continuous porous layer 501, the water-absorbing polymer 520 can be dispersed and arranged in the voids 503 (without being left standing). it can. Thereby, when the water-absorbing polymer 520 absorbs water again after drying, it can absorb water quickly.

In Example 5, Thermogel B01 (trade name, manufactured by Kojin Co., Ltd.) is used as the water-absorbing polymer 520 powder.
As the rock wool 525, granular cotton (trade name, manufactured by Nippon Rock Wool Co., Ltd.) is used.
Also, as the continuous porous layer 501 (continuous porous layer holding body 502), a fast drain (product name, manufactured by Yoshihara Chemical Co., Ltd.) is used.

(Arrangement process)
Next, in the disposing step, the water-absorbing polymer 520b that has absorbed water is disposed in the void portion 503 of the continuous porous layer 501. Specifically, the water retention member 540 was disposed in the void portion 503 of the continuous porous layer 501.

  By the way, in Example 5, unlike Example 1, the water retention agent 540 does not contain a water absorption rate reducing agent (such as glycerin). Therefore, water absorption into the water-absorbing polymer 520 is started immediately after the water-absorbing polymer 520 powder and water are brought into contact with each other in the manufacturing process of the water retention agent 540, and continues to proceed thereafter. Accordingly, the water-absorbing polymer 520 swells as time passes, so that the fluidity of the water retention agent 540 is greatly reduced. For this reason, it becomes difficult to pour the water retaining member 540 into the void portion 503 of the continuous porous layer 501. Therefore, in Example 5, as shown by an arrow in FIG. 29, the water retention member 540 disposed on the surface of the continuous porous layer 501 was pressed to fill the void portion 503 of the continuous porous layer 501.

  Furthermore, in the present Example 5, the water retention agent which mixed the rock wool 525 (fiber which is a leakage suppression material) is used. For this reason, when the water retention agent 540 is filled in the voids 503 of the continuous porous layer 501, the water-absorbing water-absorbing polymer 520b can be prevented from leaking out from the continuous porous layer 501. Therefore, as shown in FIG. 30, the state in which the water-absorbing water-absorbing polymer 520b is filled in the void portion 503 of the continuous porous layer 501 can be appropriately maintained.

(Adhesion process)
Next, the water-absorbing polymer 520 b that had absorbed water was dried in a state where the water-absorbing polymer 520 b was disposed in the void portion 503 of the continuous porous layer 501. At this time, as shown in FIG. 30, the water-absorbing (gel-like) water-absorbing polymer 520 b can be dried in a state where it is in contact with the surface of the rock wool 525 in the gap portion 503. Thereby, as shown in FIG. 25, the dried water-absorbing polymer 520 can be attached to the surface of the rock wool 525 in the void portion 503 of the continuous porous layer 501. In this way, the water retention member 500 of Example 5 is completed.

  According to such a production method, unlike the conventional production methods (see Patent Documents 1 and 2), part or all of the water-absorbing polymer is not taken into the skeleton of the continuous porous layer, and the skeleton The water-absorbing polymer is not bonded to the skeleton with an adhesive that bonds them together. Therefore, when the water-absorbing polymer 520 absorbs water, swelling due to water absorption is not hindered by the skeleton or the adhesive, so that the original characteristics of the water-absorbing polymer 520 can be fully exhibited and water can be absorbed appropriately. . Therefore, according to the manufacturing method of the fifth embodiment, it is possible to obtain the water retention member 500 capable of securing a sufficient water retention amount.

  As mentioned above, although this invention was demonstrated according to Examples 1-5 and the modifications 1 and 2, this invention is not limited to the said Example etc., In the range which does not deviate from the summary, it changes suitably. Needless to say, this is applicable.

For example, in Examples and the like, Thermogel (trade name, manufactured by Kojin Co., Ltd.) was used as the water-absorbing polymer, but modified acrylic cross-linked heavy metals such as Aquaric CS-6 (trade name, manufactured by Nippon Shokubai Co., Ltd.). You may use the water absorbing polymer which has a coalescence as a main component.
A water-absorbing polymer mainly composed of a modified acrylic cross-linked polymer is excellent in salt resistance. For this reason, if salt is spread on the surface of the water-retaining member disposed in the voids 103 to 303 of the continuous porous layers 101 to 301, the water-absorbing polymer located on the surface of the water-retaining member can be obtained. , Salt water can be retained. Thereby, the freezing point on the surface of the water retaining member can be lowered to prevent the surface from freezing.
In the case of producing a water-retaining member by the production method of Example 3 using a water-absorbing polymer mainly composed of a modified acrylic cross-linked polymer such as Aquaric CS-6, It is preferable to spray water instead. This is because a water-absorbing polymer mainly composed of a modified acrylic cross-linked polymer is difficult to absorb ethanol.

  In Examples 1 and 2, the water retention agent 40 in which the water-absorbing polymer powder, glycerin and water were mixed at a ratio of 1: 30: 126 (weight ratio) was used. However, the mixing ratio is not limited to this. For example, if the proportion of glycerin is reduced, the viscosity of the water retention treatment agent decreases, so that the water retention treatment agent quickly enters the voids 103 and 203 of the continuous porous layers 101 and 201 in the infiltration step. Thereby, the work time in an infiltration process can be shortened. Thus, the working time in the infiltration process can be adjusted by adjusting the mixing ratio of glycerin.

  Further, in Examples 1 and 2, the water retention treatment agent 40 in which water-absorbing polymer powder, glycerin (corresponding to a water absorption rate reducing agent) and water were mixed was used as the water retention treatment agent. You may use the water retention agent which mixed (For example, viscosity minerals, such as an attapulgite). If the water retention agent mixed with the gelling accelerator is filled in the voids 103 and 203 of the continuous porous layers 101 and 201, the water absorption is performed in the voids 103 and 203 of the continuous porous layers 101 and 201. The polymer powder can be quickly gelled. Thereby, the water absorbing polymer powder which absorbed water can be appropriately hold | maintained to the aggregates 110 and 210 which comprise the continuous porous layers 101 and 201. FIG.

  In Examples 1 and 2, the water retention treatment agent 40 in which the water-absorbing polymer powder, glycerin and water are mixed is used, but a surfactant may be further added to form a water retention treatment agent. By adding a surfactant, the fluidity of the water retention treatment agent is increased, which is preferable because the water retention treatment agent can easily enter the voids 103 and 303 of the continuous porous layers 101 and 301. Furthermore, since the fluidity of the water retention treatment agent lasts for a long time, it is preferable because the time during which the water retention treatment agent can enter the voids 103 and 303 of the continuous porous layers 101 and 301 is increased.

Furthermore, the volume of the water retention agent can be increased (the density can be decreased) by bubbling the water retention agent added with the surfactant. Thereby, since the ratio of the water which occupies for the water retention agent which permeates in the cavity 103,303 of the continuous porous layers 101,301 can be reduced, the drying time in the subsequent adhesion process can be shortened. For example, with respect to the water retention treatment agent 40 of Examples 1 and 2, if the water retention treatment agent having the same volume is used by making the amount of water mixed in half, the drying time in the adhering step can be reduced to about half. Can do.
In addition, as surfactant, AE agents, such as AE-02 (made by Kao, brand name), can be used, for example. Moreover, the addition amount of surfactant is good to add 0.2 weight part surfactant with respect to 1 weight part water-absorbing polymer powder, for example.

  In Example 5, a water retention agent in which water-absorbing polymer 520 powder, water W, and rock wool 525 were mixed was used to manufacture the water retention member 500. However, as in Example 1, glycerin (water absorption) A water retention agent to which a speed reducing agent is added may be used. By adding glycerin (water absorption rate reducing agent), water absorption of the water absorbent polymer 520 can be suppressed, and the water absorbent polymer can be further suppressed from remaining in an untreated state. It becomes easy to fill the void portion 503 of the layer 501.

  In Example 5, a water retention agent in which water-absorbing polymer 520 powder, water W, and rock wool 525 are mixed is used. However, a water retention agent to which bentonite (clay mineral) is added may also be used. By adding bentonite, the water-absorbing polymer that has absorbed 100% of the absorbable water can also be gelled to reduce the fluidity. Furthermore, since the adhesiveness of the surface of the water-absorbing polymer that has absorbed water is increased, the water-absorbing water-absorbing polymer is likely to adhere to the skeleton 510 of the continuous porous layer 501 and the like. Thereby, it can further suppress that the water absorbing polymer which absorbed water leaks outside from the continuous porous layer 501. The water retention agent can be produced by mixing water-absorbing polymer powder, water, rock wool, and bentonite in a ratio of, for example, 1: 150: 6: 2 (weight ratio).

1 is a perspective view of a water retention member 100 according to Example 1. FIG. It is an expanded sectional view of the water retention member 100, and corresponds to the sectional view taken along the line AA in FIG. It is a perspective view of the water retention artificial grass 150 concerning Example 1. FIG. It is explanatory drawing explaining the manufacturing method of the water retention member concerning Example 1,2. It is explanatory drawing explaining the manufacturing method of the water retention member concerning Example 1,2. It is explanatory drawing explaining the manufacturing method of the water retention member concerning Example 1,2. It is explanatory drawing explaining the manufacturing method of the water retention member 100 concerning Example 1. FIG. It is a perspective view of the water retention member 200 concerning Example 2. FIG. It is an expanded sectional view of water retention member 200, and is equivalent to the BB arrow expanded sectional view of Drawing 8. It is explanatory drawing explaining the manufacturing method of the water retention member 200 concerning Example 2. FIG. It is a perspective view of the water retention member 300 concerning Example 3. FIG. It is an expanded sectional view of water retention member 300, and is equivalent to a CC arrow expanded sectional view of Drawing 11. It is sectional drawing of the water retention planter 350 concerning Example 3. FIG. It is explanatory drawing explaining the manufacturing method of the water retention member 300 concerning Example 3. FIG. It is explanatory drawing explaining the manufacturing method of the water retention member 300 concerning Example 3. FIG. It is explanatory drawing explaining the manufacturing method of the water retention member 300 concerning Example 3. FIG. It is explanatory drawing explaining the manufacturing method of the water retention member 300 concerning Example 3. FIG. It is explanatory drawing explaining the manufacturing method of the water retention member concerning Example 4. FIG. It is explanatory drawing explaining the manufacturing method of the water retention member concerning Example 4. FIG. It is explanatory drawing explaining the manufacturing method of the water retention member concerning Example 4. FIG. It is explanatory drawing explaining the manufacturing method of the water retention member concerning Example 4. FIG. It is explanatory drawing explaining the manufacturing method of the water retention member concerning Example 4. FIG. It is sectional drawing which shows a mode when the water retention agent 440 is filled in the space | gap part 303 of the continuous porous layer 301. FIG. It is a perspective view of the water retention member 500 concerning Example 5. FIG. It is the D section enlarged view of FIG. It is explanatory drawing explaining the usage example of the water retention member 500 concerning Example 5. FIG. It is explanatory drawing explaining the usage example of the water retention member 500 concerning Example 5. FIG. It is explanatory drawing explaining the manufacturing method of the water retention agent 540 concerning Example 5. FIG. It is explanatory drawing explaining the manufacturing method of the water retention member 500 concerning Example 5. FIG. It is explanatory drawing explaining the manufacturing method of the water retention member 500 concerning Example 5. FIG.

Explanation of symbols

40,540 Water retention agent 440 Foam water retention agent 100,200,300,500 Water retention member 101,201,301,501 Continuous porous layer 102,202,302,502 Continuous porous layer holder 103,203, 303, 503 Cavities 104, 204, 304, 504 Holes 110, 210, 310, 510 Skeleton 120, 320, 520 Water-absorbing polymer 120b, 220b, 320b, 520b Water-absorbing polymer that absorbs liquid (water-absorbing polymer that absorbs water)
120c, 320c Water-absorbing polymer powder 150 Water-retaining artificial turf (water-retaining member)
201b Inlet port surface 303b Entrance port 315 Adhesive 350 Water retention planter (water retention member)
525 Rock wool (leakage suppression material, fiber)
W Water (liquid)
ET ethanol (liquid)

Claims (13)

A continuous porous layer holding body partially or entirely comprising a continuous porous layer having a skeleton constituting a continuous pore-shaped void portion in which a plurality of pores are three-dimensionally connected;
A water-absorbing polymer that is located in the gap and capable of repeatedly performing water absorption and drying,
An arrangement step in which the water-absorbing polymer that has not absorbed or absorbed the liquid is arranged in the void of the continuous porous layer; and
The water-absorbing polymer that has absorbed the liquid is directly or indirectly through the other water-absorbing polymer that has absorbed the liquid in the gap, or an adhesive that bonds the skeletons or the skeletons to each other. The water-absorbing polymer that has absorbed water is dried in contact with the surface of a leakage suppressing material that suppresses leakage from the continuous porous layer to the outside, and the water-absorbing polymer is directly or other than the water-absorbing polymer. An attachment step of attaching to the surface of the skeleton or the adhesive or the leakage suppressing material indirectly via a polymer,
The arrangement process is as follows:
A water retention agent having fluidity, wherein the water absorbent polymer powder, a water absorption rate reducing agent for reducing the water absorption rate of the water absorbent polymer powder, and water are mixed, or
A water-retaining treatment agent having fluidity, wherein the water-absorbing polymer powder absorbs the water-absorbing rate reducing agent and then dried to reduce the water-absorbing rate, and water. A water retention agent formed by mixing
It looks including the infiltration step of entering into the gap portion of the continuous porous layer,
The leakage suppressing material is a fiber, clay mineral, or thickener,
The method for producing a water retention member, wherein the water absorption rate reducing agent is an organic solvent, a viscosity imparting agent, a monovalent metal salt, or an aqueous solution thereof . It is a manufacturing method of the water retention member according to claim 1,
The infiltration step is
The manufacturing method of the water retention member which compresses and decompress | restores the said continuous porous layer in the state which made the said water retention agent contact the surface of the said continuous porous layer. It is a manufacturing method of the water retention member according to claim 1 or 2,
The water retention agent includes an anionic water-soluble polymer as the water absorption rate reducing agent,
The arrangement step includes
Prior to the infiltration step, a polyvalent metal is formed on the surface of the continuous porous layer excluding at least the surface of the intrusion port that allows the water retention agent to enter the void of the continuous porous layer, and in the vicinity thereof. A method for producing a water-retaining member comprising a step of arranging a multivalent metal salt prior to intrusion. It is a manufacturing method of the water retention member according to any one of claims 1 to 3,
The water retention agent includes an anionic water-soluble polymer as the water absorption rate reducing agent,
The arrangement step includes
A method for producing a water-retaining member including a post-intrusion polyvalent metal salt arrangement step of arranging a polyvalent metal salt on the surface of the continuous porous layer and in the vicinity thereof after the infiltration step. It is a manufacturing method of the water retention member according to any one of claims 1 to 4,
The arrangement step includes
After the infiltration step, the surface and the vicinity thereof of the continuous porous layer, promoting the gelation of the water-absorbent powdered of the water absorbent polymer or water to the slow water-absorbent polymer powder, placing the gelling agent The manufacturing method of the water retention member including the gelatinization promoter arrangement | positioning process after infiltration. A continuous porous layer holding body partially or entirely comprising a continuous porous layer having a skeleton constituting a continuous pore-shaped void portion in which a plurality of pores are three-dimensionally connected;
A water-absorbing polymer that is located in the gap and capable of repeatedly performing water absorption and drying,
An arrangement step in which the water-absorbing polymer that has not absorbed or absorbed the liquid is arranged in the void of the continuous porous layer; and
The water-absorbing polymer that has absorbed the liquid is directly or indirectly through the other water-absorbing polymer that has absorbed the liquid in the gap, or an adhesive that bonds the skeletons or the skeletons to each other. The water-absorbing polymer that has absorbed water is dried in contact with the surface of a leakage suppressing material that suppresses leakage from the continuous porous layer to the outside, and the water-absorbing polymer is directly or other than the water-absorbing polymer. An attachment step of attaching to the surface of the skeleton or the adhesive or the leakage suppressing material indirectly via a polymer,
The arrangement process is as follows:
Foam water retention agent obtained by mixing the water-absorbing polymer powder, the water-absorbing rate reducing agent for reducing the water-absorbing rate of the water-absorbing polymer powder, water and a foaming agent, or foaming
The water-absorbing polymer powder is allowed to absorb the water-absorbing rate reducing agent, and then dried to mix the low-speed water-absorbing polymer powder with reduced water-absorbing rate, water, and a foaming agent. A foam-like water retention treatment agent
Look including a filling step of filling in the gap portion of the continuous porous layer,
The leakage suppressing material is a fiber, clay mineral, or thickener,
The method for producing a water retention member, wherein the water absorption rate reducing agent is an organic solvent, a viscosity imparting agent, a monovalent metal salt, or an aqueous solution thereof . It is a manufacturing method of the water retention member according to claim 6,
The foam-like water retention agent is a method for producing a water retention member having a viscosity increased by mixing a viscosity imparting agent. It is a manufacturing method of the water retention member according to any one of claims 1 to 7,
The water retention agent or the foamy water retention agent is
Water and said slow water-absorbent polymer powder powder or water of the water-absorbing polymer is, the manufacturing method of the continuous porous water retention the leakage suppression member suppressing leaking to the outside is formed by mixing the layer member. A continuous porous layer holding body partially or entirely comprising a continuous porous layer having a skeleton constituting a continuous pore-shaped void portion in which a plurality of pores are three-dimensionally connected;
A water-absorbing polymer that is located in the gap and capable of repeatedly performing water absorption and drying,
An arrangement step in which the water-absorbing polymer that has not absorbed or absorbed the liquid is arranged in the void of the continuous porous layer; and
The water-absorbing polymer that has absorbed the liquid is directly or indirectly through the other water-absorbing polymer that has absorbed the liquid in the gap, or an adhesive that bonds the skeletons or the skeletons to each other. The water-absorbing polymer that has absorbed water is dried in contact with the surface of a leakage suppressing material that suppresses leakage from the continuous porous layer to the outside, and the water-absorbing polymer is directly or other than the water-absorbing polymer. An attachment step of attaching to the surface of the skeleton or the adhesive or the leakage suppressing material indirectly via a polymer,
The leakage suppressing material is a fiber, clay mineral, or thickener,
The arrangement process is as follows:
In a state where at least a part of the skeleton and an adhesive that bonds the skeletons are wetted with a liquid that can be absorbed by the water-absorbing polymer, the water-absorbing polymer powder is placed in the voids of the continuous porous layer. The manufacturing method of the water retention member including the approach process made to enter. It is a manufacturing method of the water retention member according to claim 9,
The approach step includes
Of the adhesive for bonding the skeleton and the skeletons, at least a portion constituting the entrance for allowing the water-absorbing polymer to enter is not wet with the liquid, and the water-absorbing polymer powder enters the void. A method for producing a water retention member. It is a manufacturing method of the water retention member according to claim 10,
The arrangement step includes
A method for producing a water-retaining member, comprising a step of contacting a liquid that can be absorbed by the powder of the water-absorbing polymer disposed in the gap portion constituting the entrance after the entering step. A continuous porous layer holding body partially or entirely comprising a continuous porous layer having a skeleton constituting a continuous pore-shaped void portion in which a plurality of pores are three-dimensionally connected;
A water-absorbing polymer that is located in the gap and capable of repeatedly performing water absorption and drying,
An arrangement step in which the water-absorbing polymer that has not absorbed or absorbed the liquid is arranged in the void of the continuous porous layer; and
The water-absorbing polymer that has absorbed the liquid is directly or indirectly through the other water-absorbing polymer that has absorbed the liquid in the gap, or an adhesive that bonds the skeletons or the skeletons to each other. The water-absorbing polymer that has absorbed water is dried in contact with the surface of a leakage suppressing material that suppresses leakage from the continuous porous layer to the outside, and the water-absorbing polymer is directly or other than the water-absorbing polymer. An attachment step of attaching to the surface of the skeleton or the adhesive or the leakage suppressing material indirectly via a polymer,
The leakage suppressing material is a fiber, clay mineral, or thickener,
The arrangement process is as follows:
A powder of the water absorbent polymer, and suppressing the leakage suppression member from the water-absorbing polymer which absorbs water from leaking to the outside of the continuous porous layer, the water retention treating agent comprising a mixture of water,
The manufacturing method of the water retention member arrange | positioned in the said space | gap part of the said continuous porous layer. It is a manufacturing method of the water retention member according to any one of claims 1 to 12,
The said water absorbing polymer is a manufacturing method of the water retention member containing the water absorbing polymer which has temperature sensitivity.

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