JP5243374B2 - Structure and manufacturing method thereof - Google Patents

Description

  The present invention relates to a structure and a manufacturing method thereof.

  Conventionally, a liquid absorption type heat transpiration insecticide device has been used in order to efficiently evaporate an insecticide into indoor air for the purpose of preventing mosquitoes. In such an insecticidal apparatus, the chemical liquid sucked up by the liquid absorbing wick inserted into the container containing the chemical liquid is usually evaporated by heating the upper end portion of the liquid absorbing wick. In the liquid absorption type heat evaporation insecticide device, in order to stably vaporize the chemical liquid, a liquid absorption core having excellent liquid absorption and having a porous continuous space is used. The liquid medicine is sucked and evaporated by utilizing a capillary phenomenon in which the liquid chemical moves through the gap.

  As a liquid absorption core for a liquid absorption type heat transpiration insecticidal device, Patent Document 1 discloses a paste obtained by mixing wood powder or charcoal powder with mineral powder such as activated clay, diatomaceous earth, and talc. The thing hardened with is described. Patent Documents 2 and 3 describe a liquid-absorbing core having a liquid-absorbing layer made of fibers at the center and covered with a braid of fibers, and further, the braided article with a silicone varnish. In which the liquid absorbing layer and the braid are fixed.

JP 55-58047 (published April 30, 1980) JP-A-5-328884 (released on December 14, 1993) JP-A-8-205744 (released on August 13, 1996)

  However, since the liquid absorption core described in Patent Document 1 has a low liquid absorption speed, when applied to an insecticidal apparatus, the liquid absorption core is long until a necessary amount of chemical liquid can be absorbed and evaporated. It took time.

  The liquid absorption core described in Patent Document 2 or 3 also has a problem that the liquid absorption speed is slow, and it takes a long time until a necessary amount of chemical liquid can be absorbed and evaporated.

  The present invention has been made in view of these problems, and an object thereof is to absorb liquid quickly and stably without using a paste and a resin, and is excellent in transpiration. It is providing the manufacturing method of a structure.

The method for producing a structure according to the present invention includes an absorption step in which at least a part of a fiber structure is brought into contact with a dispersion in which particles are dispersed in a liquid dispersion medium, and the fiber structure absorbs the dispersion.
And a removal step of removing the liquid dispersion medium from the fiber structure that has absorbed the dispersion.

  In the method for producing a structure according to the present invention, in the absorption step, at least a part of the fiber structure is brought into contact with the dispersion, and at least a part of the fiber structure is immersed in the dispersion. It is preferable that it is performed by doing.

  In the method for producing a structure according to the present invention, the fiber structure is columnar, and contacting at least a part of the fiber structure with the dispersion liquid causes one end of the fiber structure to be in the longitudinal direction. It is preferable to be carried out by immersing in the dispersion.

  In the method for producing a structure according to the present invention, in the removing step, removing the liquid dispersion medium from the fiber structure that has absorbed the dispersion liquid is performed by drying the fiber structure. Is preferred.

  In the method for producing a structure according to the present invention, the absorption step and the removal step are performed in such a manner that the proportion of particles included in the fiber structure is 10 to 95% by weight (however, the weight of the structure is 100%). It is preferable to repeat until.

  In the method for producing a structure according to the present invention, the particle concentration in the dispersion is preferably 1 to 50% by weight.

  In the method for producing a structure according to the present invention, the average particle size of the particles is preferably 1 to 500 nm.

  In the structure manufacturing method according to the present invention, the fiber structure is preferably paper, woven fabric, or nonwoven fabric.

  In the structure manufacturing method according to the present invention, the particles are preferably inorganic particles.

  In the method for producing a structure according to the present invention, the particles are preferably silica.

  The structure according to the present invention is manufactured by any one of the above methods.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the structure which can absorb and evaporate a liquid rapidly and stably can be provided.

It is a schematic sectional drawing of the liquid absorption type heat evaporation insecticide which concerns on one Embodiment of this invention. It is a figure which shows the result of SiO2 mapping by EPMA (Electron Probe MicroAnalyzer) of the liquid absorption core cross section which concerns on one Embodiment of this invention. It is a figure which shows the electron microscope image of the liquid absorption core which concerns on one Embodiment of this invention. It is a figure which shows the result of SiO2 mapping by EPMA (Electron Probe MicroAnalyzer) of the liquid absorption core cross section which concerns on other embodiment of this invention. It is a figure which shows the result of SiO2 mapping by EPMA (Electron Probe MicroAnalyzer) of the liquid absorption core cross section which concerns on other embodiment of this invention. It is a figure which shows the electron microscope image of the liquid absorption core which concerns on other embodiment of this invention. It is a graph which shows the transpiration | evaporation property of a liquid absorption core. It is a graph which shows the transpiration | evaporation property of a liquid absorption core.

〔Structure〕
The structure according to the present invention includes particles and a fiber structure, and is characterized in that at least a part of the particles exist as an aggregate attached to the fiber structure. The structure according to the present invention can be suitably used, for example, as a liquid absorbent core that absorbs liquid to evaporate. In this embodiment, the case where the structure according to the present invention is used as a liquid absorbent core will be described as an example. The liquid-absorbing core according to the present invention can be suitably used as the liquid-absorbing core 1 of the liquid-absorbing type heat-transpiration insecticide 5 as shown in FIG. Further, for example, it can be suitably used as a liquid absorbent core for an aroma device, a deodorizing device, or the like. The details of the liquid absorption type heat transpiration insecticide 5 shown in FIG. 1 will be described later.

(Fiber structure)
The liquid absorbent core according to the present invention includes a fiber structure as a core material. In this specification, the fiber structure may be referred to as a core material. The fiber structure is formed by agglomerating a plurality of thin linear objects generally called fibers, and there are voids between the aggregated fibers. The fiber structure preferably includes hydrophilic fibers, and more preferably paper, woven fabric, or nonwoven fabric having excellent liquid absorbability. These fiber structures themselves have excellent liquid absorbency. However, the presence of particles described later as aggregates provides a liquid absorption core having excellent shape stability, and this liquid absorption structure. The core can absorb liquid quickly and stably. If paper is used as the fiber structure, the liquid-absorbent core is stable even in an aqueous solvent and can maintain the structure. Here, water or a hydrophilic solvent is intended as the aqueous solvent.

  Paper used as a fiber structure is a dispersion of fibrous material (pulp) taken from plants such as wood in water, and forms a uniform thin layer on the net or cocoon. And then entangled with each other, dehydrated, and dried. Among these papers, paper classified as sanitary paper includes tissue paper, toilet paper, towel paper, etc., all of which are characterized by high water absorption. As the paper of the present invention, sanitary paper is particularly preferable.

  The woven fabric or non-woven fabric used as the fiber structure is composed of natural fibers, chemical fibers, synthetic fibers, inorganic fibers, and the like, and any of the above fibers can be selected according to the purpose. Here, the natural fiber is a fiber obtained from a naturally existing material itself, the plant-based natural fiber includes cotton, hemp, bamboo, pulp, etc. The animal-based natural fiber includes wool, silk, etc. Is mentioned.

  Chemical fiber is a naturally occurring material that has been chemically treated. Recycled cellulose and cellulose, such as pulp, and regenerated rayon and cupra. Cellulose-treated acetate (triacetate). ) Synthetic fibers are those chemically synthesized from raw materials such as petroleum, and many examples include nylon, polyester, acrylic, polypropylene, polyurethane, and vinylon. Examples of the inorganic fiber include glass fiber, metal fiber, and carbon fiber.

(particle)
In the liquid absorbent core according to the present invention, the composition of the particles adhering to the fiber structure is not particularly limited. Various materials can be used as the material of the particles, and in particular, inorganic materials, organic materials, and mixtures thereof are preferably used. Examples of particles that can be suitably used in the present invention are as follows.

  Examples of inorganic substances include alkali metals, alkaline earth metals, transition metals, non-ferrous metals, and the like. Specific examples include gold, palladium, platinum, silver, aluminum, and the like, and oxides and hydroxides thereof. , Sulfides, and salts such as carbonates and sulfates, oxides such as silicon, aluminum, zinc, magnesium, calcium, barium, titanium, zirconium, manganese, iron, cerium, nickel, tin, hydroxide And salts such as carbonates and sulfates, and the like. Of these particles, inorganic particles are preferable, and silica is particularly preferable.

  Examples of organic substances include resins, and examples of resins include polyolefin resins such as polyethylene, polypropylene, and polystyrene, acrylic resins such as polymethyl methacrylate, polyamide resins such as hexamethylenediamine-adipic acid polycondensate, and polyethylene. Examples thereof include polyester resins such as terephthalate and polylactic acid, polyether resins such as polyphenylene ether and polypropylene glycol, polycarbonate resins, and liquid crystal resins.

  The size and form of the particles constituting the aggregates adhering to the fiber structure may be any size as long as the particles can enter the voids inside the fiber structure. Particularly, the size of the particles is small, and the particles are placed in the liquid dispersion medium. What can be supplied as a dispersed colloidal solution is more preferable. When supplying particles from a colloidal solution, the size of the particles may be any size that can be colloidally dispersed in the liquid dispersion medium, but those having an average particle diameter of 1 to 500 nm are preferably used, and 2 nm to 100 nm. More preferably, those having a thickness of 5 nm to 70 nm are more preferable in terms of easy handling. Since the form in which the particles are aggregated and the void size in the fiber structure are different depending on the combination of the size and the size of the particle size, the particle size may be selected according to the purpose. In addition, the liquid absorption speed | velocity | rate when using as a liquid absorption core becomes late, so that the space | gap size in a fiber structure is small and the porosity is low.

  As the colloidal solution, a known colloidal solution can be used, and examples thereof include a metal colloidal solution, an oxide colloidal solution, a hydroxide colloidal solution, a carbonate colloidal solution, and a sulfate colloidal solution. Examples of the metal element contained in the metal colloid solution include gold, palladium, platinum, and silver. Elements contained in oxide colloid solutions, hydroxide colloid solutions, carbonate colloid solutions, or sulfate colloid solutions include silicon, aluminum, zinc, magnesium, calcium, barium, titanium, zirconium, manganese, iron, cerium, Examples are nickel and tin. Of these, an oxide colloid solution or a hydroxide colloid solution is preferably used, and a silicon oxide colloid solution is particularly preferable. When a silicon oxide colloidal solution is used, the liquid-absorbing core obtained contains silica as particles. Such a liquid absorption core is preferable because of its excellent heat resistance.

  The liquid absorbent core according to the present invention includes particles and a fiber structure, and at least a part of the particles is present as an aggregate adhered to the fiber structure, and thus has sufficient shape stability. . Therefore, stable liquid absorption is exhibited. In particular, when paper is used as the fiber structure, it has excellent shape stability in aqueous liquids. Therefore, even when water-based chemicals are absorbed and heated to evaporate, the shape is maintained and stable and rapid. Liquid absorption and transpiration.

  In the present invention, the shape of the liquid absorption core is determined by the shape of the fiber structure. For example, in order to obtain a columnar liquid-absorbing core such as a columnar shape, the fiber structure may be formed into a columnar shape. When a plate-shaped or sheet-shaped liquid-absorbing core is desired, the fiber structure is What is necessary is just to shape | mold previously in plate shape or sheet shape. At this time, when the fibers of the fiber structure are configured to be continuous in the direction of sucking up the liquid, the flow of the liquid is preferable. For example, when forming a cylindrical fiber structure, it can be formed into a cylindrical shape by spirally winding from one side of a sheet of paper, and the continuous direction of the paper matches the longitudinal direction of the cylinder Therefore, the suction is performed promptly.

  The liquid absorbent core according to the present invention can be manufactured without using an adhesive such as varnish. Moreover, since the kind of particle to be used, the particle diameter, and the like can be appropriately changed, the transpiration of the liquid absorbent core can be changed by these changes, and as a result, the transpiration can be easily controlled. .

[Method of manufacturing structure]
According to the structure manufacturing method of the present invention, a structure used as a liquid absorption core can be manufactured. In the present embodiment, a method for manufacturing a structure according to the present invention will be described using a method for manufacturing a liquid absorbent core as an example. The method for producing a liquid-absorbent core according to the present invention includes an absorption step in which at least a part of a fiber structure is brought into contact with a dispersion in which particles are dispersed in a liquid dispersion medium, and the fiber structure is allowed to absorb the dispersion. And a removal step of removing the liquid dispersion medium from the fiber structure that has absorbed the dispersion. For example, a fiber structure composed of a plurality of fibers is brought into contact with a dispersion liquid in which particles are dispersed in a liquid dispersion medium, and the fiber structure is absorbed to absorb the dispersion liquid. By removing the dispersion medium, the liquid absorption core can be manufactured. By producing the liquid absorbent core in this manner, at least a part of the particles adheres to the fibers of the fiber structure to form an aggregate, and the fibers can be densely packed in the fiber structure.

  Here, the dispersion liquid in which the particles are dispersed in the liquid dispersion medium may be any dispersion liquid in which the particles are dispersed in the liquid dispersion medium without being precipitated. In this dispersion, a surfactant, an emulsifier and the like may be added for the purpose of better dispersing the particles. The liquid dispersion medium for dispersing the particles is not particularly limited, but water is preferable from the viewpoint of simplification of production equipment and environmental burden. The concentration of the particles in the dispersion is not particularly limited, but is usually 1 to 50% by weight, and in order to quickly fill and agglomerate the particles with high density, the concentration is preferably higher, and preferably 20 to 50% by weight. .

  Examples of the method of bringing the fiber structure into contact with the dispersion include a method of immersing at least a part of the fiber structure in the dispersion or applying the dispersion to the fiber structure. When the fiber structure is immersed in the dispersion, the fiber structure may be completely submerged in the dispersion, or a part of the fiber structure is immersed in the dispersion, and the dispersion is made into a fiber structure by capillary action. It may be distributed throughout the body.

  If only a part of the fiber structure is immersed in the dispersion and absorbed, the amount of liquid necessary for filling is absorbed, so there is no waste, and the immersion of the dispersion is continued while removing the liquid dispersion medium. Or by repeating the removal of the liquid dispersion medium and the contact with the dispersion liquid, the concentration of the particles in the fiber structure can be increased. In particular, it is preferable to repeat the absorption step and the removal step until a desired amount of particles are included in the fiber structure and a desired aggregate is formed. At this time, you may repeat an absorption process and a removal process until the ratio of the particle | grains adhering to the fiber structure will be 10 to 95 weight% (however, the weight of a liquid absorption core shall be 100%). Further, when a columnar fiber structure is used, one end in the longitudinal direction may be immersed in the dispersion to be absorbed. In the case where the dispersion liquid is sprayed on the fiber structure by spraying or applied with a brush or the like, it is preferable that the dispersion liquid is sufficiently infiltrated into the fiber structure.

  As a method for removing the liquid dispersion medium from the fiber structure that has absorbed the dispersion liquid, for example, the fiber structure that has absorbed the dispersion liquid may be naturally dried at room temperature, or forced by heating with a dryer. In particular, the transpiration of the liquid dispersion medium may be promoted. By removing the liquid dispersion medium, only the particles remain attached to the fibers, and the particles are further aggregated and solidified to give the fiber structure suitable hardness and liquid resistance. At this time, the ratio of the particles adhering to the fiber structure may be 10 to 95% by weight, and preferably 50 to 90% by weight (however, the weight of the liquid absorbent core is 100%). In addition, the fiber structure and the dispersion may contain a dye, a pigment, an antioxidant, an ultraviolet absorber, a preservative, and the like as necessary.

  In the liquid absorbent core produced by the method for producing a liquid absorbent core according to the present invention, at least a part of the particles adheres to the fiber structure and exists as an aggregate, and the particles are densely packed in the fiber structure. Therefore, it has sufficient shape stability. Therefore, stable and quick liquid absorption and transpiration can be performed.

[Transpiration device and transpiration method]
The transpiration apparatus according to the present invention comprises a container containing an evaporable liquid and a structure according to the present invention, a part of which is immersed in the evaporable liquid and the other part is exposed from the container. The liquid-absorbing core is provided. The transpiration apparatus according to the present invention can be used as an insecticidal apparatus, for example, using an insecticidal solution containing an insecticidal component as the evaporable liquid. In this embodiment, the case where the structure according to the present invention is used as a liquid absorption core and the transpiration apparatus according to the present invention is used as an insecticidal apparatus will be described as an example. The insecticidal apparatus according to the present invention can be a liquid-absorbing heat-vaporizing insecticidal apparatus further provided with a heater (heating means) for heating a portion of the liquid-absorbing core that is not immersed in the insecticidal liquid.

  One embodiment of a liquid-absorbing heat-transpiration insecticide apparatus using the liquid-absorbent core according to the present invention will be described below with reference to FIG. FIG. 1 is a schematic cross-sectional view showing a liquid-absorbing heat transpiration insecticide device 5 of the present invention. As shown in FIG. 1, the liquid absorption type heat transpiration insecticide 5 includes a cylindrical liquid absorption core 1, a ring-shaped heater 2 that heats the liquid absorption core 1, a heater support portion 3 that supports the heater 2, And a container 4 filled with an insecticidal solution.

  The absorbent core 1 is inserted into the container 4 so that one end in the longitudinal direction protrudes and the other end is immersed in the insecticide. The heater 2 indirectly heats the top of the liquid absorbent core 1 protruding from the container 4. The heater 2 is not particularly limited as long as it is a heating element capable of indirectly heating the fiber structure to about 60 to 150 ° C., but typically, a normal ring-shaped electricity that generates heat when energized. A heater is given. In this case, the heater 2 is connected to a cord (not shown) for energizing and generating heat.

  The distance between the heater 2 and the liquid absorbent core 1 is usually in the range of 0.5 to 2 mm, and the heating temperature of the heater 2 is desirably 150 ° C. or less from the viewpoint of safety. The liquid absorption core 1 is usually installed so that the lower end portion inserted into the container 4 is positioned about 0 to 2 mm from the bottom surface inside the container 4. In order to suck up and use the insecticide in the container 4 without waste, the lower end should be as close to the bottom as possible.

  The material of the container 4 is not particularly limited as long as it is a material that does not leak and bleed out even after a long period of time, but glass, plastic, etc. that can confirm the remaining amount of the chemical from the outside A transparent material is preferable, and a material having an ultraviolet blocking property is preferable for the purpose of preventing photodecomposition of the drug. In addition, the liquid absorption type heat transpiration insecticidal device 5 may be provided with a pilot lamp indicating whether or not current is supplied.

  In the present invention, various known insecticides can be used as the insecticide contained in the insecticide, and examples include pyrethroid insecticides, carbamate insecticides, and organophosphorus insecticides. In general, pyrethroid insecticides are preferably used because of their high safety, such as allethrin, bioarethrin, prareslin, methfluthrin, profluthrin, transfluthrin, phthalthrin, etofenprox, resmethrin, framethrin, permethrin, phenothrin, fenvalerate, Examples include esfenvalerate, cypermethrin, ciphenothrin, fenpropatoline, fenfluthrin, empentrin, terrareslin, d-tetramethrin, cyphenothrin, tralomethrin, and deltamethrin.

  Examples of carbamate insecticides include fenocarb, methoxadiazone, alanib, oxamyl, carbosulfan, benfuracarb, mesomil, carbaryl (NAC), thiodicarb, etiophencarb. Examples of organophosphorus insecticides include fenitrothion, acephate, diazinon, marathon and the like.

  Further, as synergists that enhance the action of these insecticides, piperonyl butoxide, N-octylbicycloheptene dicarboximide, N- (2-ethylhexyl) -1-isopropyl-4-methylbicyclo [2,2,2 ] Oct-5-ene-2,3-dicarboximide, octachlorodipropyl ether and the like can be contained in the insecticide. The content of the synergist is preferably 0.1 to 10 times that of the insecticidal component.

  The concentration of the insecticidal component in the insecticidal solution is preferably 0.3% by weight or more and 20% by weight or less, preferably in the range of 0.3% by weight to 5% by weight. These insecticidal components may be used alone or in combination. If necessary, stabilizers, deodorants, pigments, and other auxiliary agents can be added in small amounts to the insecticide. When using the fragrance for the purpose, a liquid containing one or more natural or artificial fragrances can be used as the liquid into which the liquid absorbent core is immersed. Further, depending on the purpose, a deodorant, disinfectant, repellent can be used. Various drugs such as a drug can also be used. These components can also be used by being dissolved in an organic solvent or a mixture of an organic solvent and water.

  In the insecticidal apparatus according to the present invention, the insecticidal solution may be one in which an insecticidal component is dissolved in an organic solvent or a mixture of an organic solvent and water. Although it does not specifically limit as a solvent in an insecticidal liquid, The oily liquid which consists only of a solvent, the aqueous liquid which mixed the solvent and water, etc. are mentioned. The solvent used for the oily liquid is usually an organic solvent, preferably a saturated hydrocarbon solvent (aliphatic saturated hydrocarbon solvent, alicyclic saturated hydrocarbon solvent), more preferably a boiling point of 180 ° C to 310 ° C. One or two or more kinds of solvents selected from these saturated hydrocarbon solvents. Specific examples of such saturated hydrocarbon solvents include, for example, No. 0 solvent H (manufactured by Nippon Oil), No. 0 solvent M (manufactured by Nippon Oil), No. 0 solvent L (manufactured by Nippon Oil), normal paraffin (Manufactured by Nippon Oil), IP Solvent 2028 (manufactured by Idemitsu Kosan), Norper 12 (manufactured by Exxon Mobil Chemical), Norper 13 (manufactured by Exxon Mobil Chemical), Norper 15 (manufactured by Exxon Mobil Chemical), Isopar M (manufactured by Exxon Mobil Chemical) ), Isopar L (manufactured by ExxonMobil Chemical), Isopar V (manufactured by ExxonMobil Chemical), Exol D80 (manufactured by ExxonMobil Chemical), Exol D110 (manufactured by ExxonMobil Chemical), Exol D130 (manufactured by ExxonMobil Chemical) .

  Moreover, in order to control the transpiration of the insecticide, for example, a high-boiling solvent having a boiling point of 300 ° C. or higher can be contained in the insecticide. Specific examples thereof include isopropyl laurate, dibutyl phthalate, dibutyl sebacate, acetyl tributyl citrate, medium chain fatty acid triglyceride and other esters or fatty acid derivatives, higher alcohols such as octyldodecanol, and fats and oils such as corn oil. Etc.

  Examples of the solvent used in the aqueous liquid include those obtained by adding a surfactant that evaporates in water at 100 to 180 ° C. which is a heater heating temperature region, as disclosed in JP-A-3-7207, and JP-A-3-7207. As disclosed in JP-A-7-31002, a liquid in which an aqueous organic solvent having a relatively low molecular weight and a boiling point in the range of 100 to 300 ° C. that evaporates when heated is added to water. In the mixed solution of the aqueous organic solvent and water, an aqueous diol compound, an aqueous alcohol compound, or the like can be further used as a volatilization regulator.

  Since the insecticidal apparatus according to the present invention includes the liquid-absorbing wick according to the present invention, the insecticidal liquid is absorbed into the liquid-absorbing wick, and the absorbed liquid is heated to evaporate from the surface of the liquid-absorbing wick. Even if it is made to do, the shape of the said liquid absorption core is maintained, For this reason, the said insecticidal apparatus can perform liquid absorption and transpiration stably and rapidly.

  The transpiration method according to the present invention can be implemented as an insecticidal method by using, for example, an insecticide. In this embodiment, the transpiration method according to the present invention will be described using an insecticidal method as an example. In the insecticidal method according to the present invention, a part of the liquid absorbent core according to the present invention is immersed in an insecticidal liquid containing an insecticidal component, the liquid absorbent core absorbs the insecticidal liquid, and the liquid is absorbed. Liquid is evaporated from the surface of the absorbent core. From the viewpoint of transpiration efficiency, it is preferable to heat the absorbent core that has absorbed the insecticide. In one embodiment, a part of the liquid absorbent core is immersed in an insecticidal solution, and a part of the liquid absorbent core that is not immersed in the insecticidal liquid is heated by a heater or the like. The insecticidal method according to the present invention may be performed using the above-described insecticidal apparatus according to the present invention. The insecticidal method according to the present invention uses the liquid-absorbing core according to the present invention, so that the insecticidal effect can be rapidly expressed and the insecticidal effect can be sustained stably.

[Transpiration kit]
The kit for transpiration according to the present invention can be used as an insecticidal kit. In this embodiment, the transpiration kit according to the present invention will be described using an insecticidal kit as an example. The kit for insecticidal use according to the present invention is characterized by comprising the structure according to the present invention used as a liquid absorbent core. The insecticidal kit according to the present invention preferably further comprises an insecticidal solution containing an insecticidal component. The insecticide can be selected from those exemplified as the insecticide contained in the insecticide described above. The insecticidal kit according to the present invention is only required to include at least the liquid absorbent core according to the present invention, thereby improving the shape stability of the liquid absorbent core in the liquid while maintaining liquid absorbency. Can do. Thereby, stable and quick liquid absorption and transpiration can be realized.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to these Examples.

[1. (Manufacture of absorbent core)
Kimwipe (registered trademark) "Wiper S-200" (pulp 100%, size 120mm x 215mm, made by Nippon Paper Crecia) Fold the long side of the sheet in half and wind it tightly from the end to form a cylinder. The core material A was produced by cutting into a length of 73 mm according to the height. The weight of the core material A at this time was 0.6 g. The core material A was further wound so as to be covered with a PET film, and an adhesive tape was stuck on the winding end and fixed. Put a 10 cc colloidal silica liquid (“Snowtex 20”; manufactured by Nissan Chemical Co., Ltd.) with an average particle size of 20 nm and a solid concentration of 20% by weight into a 50 cc glass tube, and immerse the lower end (1 cm) of the core material A in the colloidal silica liquid. It was. After 30 minutes, the core material A was pulled up from the colloidal silica solution, laid down horizontally and allowed to stand overnight, and then the PET film was removed and left to dry completely. The product obtained in this manner is referred to as a liquid absorption core A. The weight of the absorbent core A after drying was 1.2 g, and the adhered silica particles were 50% by weight.

  Next, the absorbent core was the same as the absorbent core A, except that the core material was immersed in a colloidal silica liquid (“Snowtex ZL”; manufactured by Nissan Chemical Co., Ltd.) having an average particle size of 70 nm and a solid content of 40% by weight. B was produced. The weight of the absorbent core B after drying was 2.3 g, and the attached silica particles were 74% by weight.

  Here, the analysis results of the liquid absorbent core B are shown in FIGS. FIG. 2 is a diagram showing a result of SiO2 mapping by EPMA (Electron Probe Micro Analyzer) of a cross section of the upper part of the liquid absorbent core B (the end part side not immersed in the colloidal silica liquid). In FIG. 2, a reflected electron image (BSE) is shown on the left side, and a Si mapping image at the same location is shown on the right side. As shown in FIG. 2, many silica particles are aggregated in the fibers of the core material of the liquid absorbent core B.

  FIG. 3 is an electron microscope image of the liquid absorbent core B. In FIG. 3, an image with an acceleration voltage of 10.0 kV and a magnification of 10.0 k is shown on the upper left, an image with an acceleration voltage of 10.0 kV and a magnification of 50.0 k is shown on the upper right, and an acceleration voltage of 10.0 kV and a magnification of 100 is shown on the lower left. 0.0k image is shown. As shown in FIG. 3, the silica particles are aggregated and adhered to the core fibers such that the core fibers cannot be observed.

  Next, the absorbent core was the same as the absorbent core A except that the core material was immersed in a colloidal silica liquid (“Snowtex XS”; manufactured by Nissan Chemical Co., Ltd.) having an average particle size of 5 nm and a solid content of 20% by weight. C was produced. The weight of the absorbent core C after drying was 1.4 g, and the adhered silica particles were 57% by weight.

  Here, the analysis result of the liquid absorption core C is shown in FIGS. FIG. 4 is a diagram showing the results of SiO2 mapping by EPMA in the cross section of the upper part of the liquid absorbent core C (the end side not immersed in the colloidal silica liquid), and FIG. It is a figure which shows the result of the SiO2 mapping by EPMA of the cross section of the side immersed in the colloidal silica liquid. 4 and 5, a backscattered electron image (BSE) is shown on the left side, and a Si mapping image at the same location is shown on the right side. As shown in FIGS. 4 and 5, a large number of silica particles are agglomerated in the upper and lower portions of the fibers of the core material of the liquid absorbent core C.

  FIG. 6 is an electron microscope image of the liquid absorbent core C. In FIG. 6, an image with an acceleration voltage of 10.0 kV and a magnification of 10.0 k is shown on the upper left, an image with an acceleration voltage of 10.0 kV and a magnification of 50.0 k is shown on the upper right, and an acceleration voltage of 10.0 kV and a magnification of 100 is shown on the lower left. 0.0k image is shown. As shown in FIG. 6, silica particles are aggregated and adhered to the core fiber so that the core fiber cannot be observed.

  Next, a colloidal silica liquid with an average particle diameter of 20 nm (“Snowtex 20”; manufactured by Nissan Chemical) and a colloidal silica liquid with an average particle diameter of 5 nm (“Snowtex XS”; manufactured by Nissan Chemical) are mixed at a ratio of 1: 1. A liquid absorbent core D was produced in the same manner as the liquid absorbent core A except that the core material was immersed in a colloidal silica liquid having a solid content concentration of 20% by weight. The weight of the absorbent core D after drying was 1.4 g, and the adhered silica particles were 57% by weight in total.

  A liquid absorbent core E was prepared in the same manner as the liquid absorbent core A except that a tobacco filter (circumference 24 mm, cut to a length of 70 mm, weight 0.4 g) was used instead of the core material A. The weight of the absorbent core E after drying was 1.2 g, and the adhered silica particles were 67% by weight. As a comparative example, a commercially available talc core (diameter 7 mm, length 73 mm) was used as the liquid absorbing core F.

[2. Preparation of insecticidal solvent]
A mixed solvent (Norpar 13 / Norper 15 = 7 wt / 3 wt) composed of Norper 13 (manufactured by ExxonMobil Chemical) which is a commercially available saturated hydrocarbon solvent and Norper 15 (manufactured by ExxonMobil Chemical) which is a saturated hydrocarbon solvent. An oily solvent was prepared using this. An aqueous solvent was prepared using a commercially available mixed solvent consisting of 2- (2-butoxyethoxy) ethanol and water (2- (2-butoxyethoxy) ethanol / water = 7 wt / 3 wt).

[3. Heating transpiration device
The measurement of the transpiration rate of each liquid absorption core mentioned above was performed using the heating transpiration apparatus as shown in FIG. Here, the container 4 was made of a cylindrical transparent plastic having a height of 55 mm, and a commercially available product having an inner diameter of 40 mm at the bottom, a height of 35 mm up to the bottle shoulder and an inner diameter of 16 mm was used. As a core support (not shown) for supporting the liquid absorbent core, a lid-like soft plastic material having a hole with a diameter of 7 mm in accordance with the outer diameter of the liquid absorbent core 1, which is a chemical solution filled in the container 4 The one that can be sealed so as not to leak and ooze out was used.

  As the ring-shaped heater 2 for indirectly heating the upper surface protruding from the container 4 of the absorbent core 1, a metal having a width of 15 mm rolled into a ring having an inner diameter of 10 mm was used. Further, the heater support 3 for supporting the heater 2 was disposed at a height of 60 to 75 mm from the bottom surface of the container 4, that is, at a position corresponding to the upper part of the liquid absorbent core 1. The heater 2 was set to about 130 ° C. when energized.

[4. (Measurement of transpiration rate)
30 g of the oil-based solvent prepared as described above was put in the container 4, and one end of the liquid absorbent cores A to F was immersed in the oil-based solvent and set so as to be in contact with the bottom surface of the container 4, and the total weight was measured. The container 4 was heated to about 130 ° C. The transpiration rate was calculated by measuring the weight of the container 4 for each elapsed time until the oily solvent disappeared. The results are shown in FIG. As shown in FIG. 7, the absorbent cores A to F evaporated the solvent at a constant rate until the oil-based solvent in the container 4 disappeared.

  Next, using the aqueous solvent instead of the oily solvent, the transpiration rate was measured for the absorbent cores A and F in the same manner as described above. The results are shown in FIG. As shown in FIG. 8, the absorbent core A evaporated the solvent at a constant rate until the aqueous solvent in the container 4 disappeared, as in the case of using the oily solvent. In addition, the liquid absorption core F was dissolved immediately after being immersed in the aqueous solvent, and the transpiration rate could not be measured.

  Here, Table 1 shows the average transpiration rate of each liquid absorbent core.

  As shown in Table 1, the liquid absorbent cores A to E according to the present invention exhibited the same transpiration as the conventional liquid absorbent core F. Furthermore, while the conventional liquid absorption F was dissolved in an aqueous solvent and could not be used, the liquid absorption core A according to the present invention was stable and excellent transpiration even when an aqueous solvent was used. Showed sex.

  According to the present invention, a structure capable of absorbing and evaporating stably for a long time can be provided, and thus can be suitably used for an evaporating apparatus for absorbing and evaporating various insecticides, aromatic liquids, deodorizing liquids, and the like. is there.

1 Liquid absorption core (structure)
2 Heater (heating means)
3 Heater support 4 Container 5 Absorption type heat transpiration insecticidal device (transpiration device)

Claims (11)

An absorption step in which at least a part of the fiber structure is brought into contact with a dispersion in which particles are dispersed in a liquid dispersion medium, and the dispersion is absorbed by the fiber structure;
And a removing step of removing the liquid dispersion medium from the fiber structure that has absorbed the dispersion.   In the absorption step, contacting at least part of the fiber structure with the dispersion is performed by immersing at least part of the fiber structure in the dispersion. Item 2. The method according to Item 1.   In the absorption step, contacting at least a part of the fiber structure with the dispersion is performed by immersing one end of the fiber structure in the longitudinal direction in the dispersion. The method of claim 1.   4. The method according to claim 1, wherein in the removing step, removing the liquid dispersion medium from the fiber structure that has absorbed the dispersion is performed by drying the fiber structure. The method according to claim 1.   The absorption step and the removal step are repeated until the ratio of particles included in the fiber structure is 10 to 95% by weight (however, the weight of the structure is 100%). The method of any one of 1-4.   The method according to claim 1, wherein the particle concentration in the dispersion is 1 to 50% by weight.   The average particle diameter of the said particle | grain is 1-500 nm, The method of any one of Claims 1-6 characterized by the above-mentioned.   The method according to claim 1, wherein the fibrous structure is paper, woven fabric, or nonwoven fabric.   The method according to claim 1, wherein the particles are inorganic particles.   The method according to claim 9, wherein the particles are silica.   A structure manufactured by the method according to claim 1.