JP2001029730A - Miticidal dehumidifying sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a miticidal dehumidifying sheet used in beddings always directly touched with the body such as a futon or the like or clothing such as cloths or the like and a housing place thereof without anxiety. SOLUTION: A sheetlike miticidal dehumidifying sheet having miticidal effect is obtained by packaging a moisture absorbent with a film or nonwoven fabric having air permeability as an effective component in a divided form and the moisture absorbable surface area of the film or nonwoven fabric is 0.2-4.0 m2 and the moisture absorbing capacity per a sheet at 25 deg.C and 80% RH is 10 g/m2/day or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-mite dehumidifying sheet, and more particularly to a place where a bedding such as a futon, a cushion, a garment, a closet in which clothes are stored, a closet, a storage container, and the like. Accordingly, the present invention relates to a mite-preventing dehumidifying sheet for controlling ticks, thereby adjusting humidity and suppressing the occurrence of ticks.

[0002]

2. Description of the Related Art In recent years, with changes in housing styles, rooms are warm and humid all year round, and mites are generated in the rooms, which is a hygiene problem. Furthermore, in infants, allergic asthma and atopic dermatitis due to mites have become social problems. Conventionally, as a controlling agent for mites that occur in a house, DDVP, organophosphorus pesticides such as fenitrothion, phenothrin, and pyrethroid-based pesticides such as permethrin are the most widely used agents. If you don't want to use any kind of chemicals, use a vacuum cleaner to physically wipe out the surface of tatami or carpets,
Carpets and futons have been sun-dried or heat-treated. As a method using no other chemicals than the above, a method of spraying a powder mainly containing an inorganic salt such as a sulfate and a citrate and / or an organic salt (Japanese Patent Application Laid-Open No. 59-19 / 1984)
No. 6802), a method of spraying a fine polymer powder or the like (Japanese Patent Application Laid-Open No. 1-110607), a method of attaching a powdery zeolite smaller than the distance between the hairs of the pests (Japanese Patent Application Laid-Open No. 5-201818), Particle size 100 μm
The following method of spraying white carbon (Japanese Patent Laid-Open No. 9-2
No. 63506) has been proposed.

[0003]

However, the use of chemicals such as insecticides indoors should be avoided as much as possible from the effects on humans and animals in terms of safety and environmental pollution. For example, in Futon, where habitat for indoor dust mites, the drug is unlikely to penetrate into the interior of Futon, and since it sprays a large amount of drug, only those that are in direct contact with the body for a long time or constantly,
The effect of the toxicity of the drug is very worrisome, and it is a control method that you do not want to use. As a method that does not use chemicals, cleaning with a vacuum cleaner sucks mites on the surface of tatami mats and carpets,
Many ticks are lurking in the depths and gaps between them, and it is difficult to control them simply by using a vacuum cleaner. Drying in the sun is troublesome and most of the time there is no such place. There are problems in that the control by heating requires a lot of labor and equipment, and that it is expensive to rely on a contractor. Also, if you do not use another drug,
Powders are directly sprayed and adhered to control them, and there are many practical problems such as contamination by powders, inhalation of powders scattered at the time of spraying, and troublesome cleaning for removing the powders after the control. Further, the control with the powder and granule is limited in the use place and cannot be used in places such as futon, closet, and closet.
(JP-A-59-196802, JP-A-1-110
No. 67, JP-A-5-201818, JP-A-9
See -263506. The object of the present invention is to control mites without the need to worry about the safety of the above-mentioned conventional chemicals and control powders, and without much trouble. In addition, by adjusting the humidity at the same time as controlling the mites, it is possible to suppress the inhabitation and reproduction of the mites. Further, the sheet can be repeatedly used by performing the regenerating process, and the regenerating is easy with a sheet size which is easy to handle. As described above, an object of the present invention is to provide a mite-preventing dehumidifying sheet that can be used safely in beddings such as futons and clothes such as clothes that are always in direct contact with the body and in a storage place thereof.

[0004]

The invention according to claim 1 is
A sheet-shaped mite-proof dehumidifying sheet having a mite-proofing effect, wherein a moisture-absorbing agent as an active ingredient is divided and packaged into a film or a nonwoven having air permeability, and the moisture-absorbable surface area of the film or the nonwoven is 0.2 m. ² / sheets-4.0 m ² /
Like in, and moisture absorption capability per sheet at 25 ° C. 80% RH is mite dehumidification sheet is 10g ^{/ m 2/1} day or more. In the invention according to claim 2, the moisture absorbent is
At least one selected from silica gel, calcium chloride, magnesium chloride, potassium acetate, dibasic sodium phosphate, sepiolite, calcium oxide, diatomaceous earth, activated carbon, activated clay, zeolite, white carbon, sodium citrate, and water-absorbing polymer It is a mite-proof dehumidifying sheet characterized by containing. In the invention according to claim 3, the average particle diameter of the desiccant is 100 μm to 5 m.
m, and the basis weight of the film or nonwoven fabric is 50 g / m
^{2 to} 100 g / m ² with a maximum pore size of 1 mm
It is a mite-proof dehumidification sheet characterized by the following.
The invention according to claim 4 is the mite-proof dehumidifying sheet, wherein each divided size of the film or the nonwoven fabric divided and packaged is in a range of 3 cm to 15 cm on a side. The invention according to claim 5 is a mite-proof dehumidifying sheet, characterized in that a means for changing a color tone is provided as an indicator indicating the moisture absorption state of the moisture absorbent.

[0005]

DETAILED DESCRIPTION OF THE INVENTION According to the study of the present inventors, it has been found that by reducing the humidity in and around the mites habitat, the insecticide, growth inhibition and repelling of dust mites can be dramatically reduced.
The anti-mite dehumidifying sheet of the present invention was completed.

An object of the present invention is to efficiently use a hygroscopic agent having no problem in safety as an active ingredient for controlling mites. Hygroscopic agents include silica gel, sepiolite, calcium oxide, diatomaceous earth, activated carbon, activated clay, zeolite, white carbon, calcium chloride, magnesium chloride, potassium acetate, dibasic sodium phosphate, sodium citrate, and water absorbing polymers. Substances. Examples of the water-absorbing polymer include cross-linked polyacrylate polyvinyl alcohol cross-linked polymer, polyacrylonitrile derivative, polyacrylamide and polyacrylate, starch-acrylonitrile graft polymer, and vinyl acetate / methyl acrylate copolymer saponification. System, modified starch, cellulose system and the like.

[0007] The selection of these hygroscopic agents may be considered according to the type or combination thereof according to the purpose of use and the place of use. For example, hygroscopic substances such as silica gel, sepiolite, calcium oxide, diatomaceous earth, activated carbon, activated clay, zeolite, white carbon, sodium citrate, dibasic sodium phosphate, and water-absorbing polymer that do not cause liquefaction after moisture absorption are used. Since there is no liquid leaching, it can be used alone. In addition, the liquid absorbent after liquefaction, such as calcium chloride, magnesium chloride, potassium acetate, or the like, is preferably used in combination with a liquid holding substance or the like that holds a liquefied liquid, or in combination with the non-liquefied hygroscopic substance. . Examples of the liquid holding substance include a water-absorbing polymer, water-absorbing paper, water-absorbing pulp, synthetic amorphous silica, synthetic calcium silicate, perlite, anhydrous gypsum, zeolite,
Examples include quicklime, silica gel, and gelling agents. At the time of combined use, it is preferable to appropriately select them in consideration of the moisture absorption capacity, the moisture absorption rate, and the like. As the use shape of the hygroscopic substance,
The hygroscopic substance may be used alone or in the form of a powder, granule or plate, or may be contained in a powdery or fibrous impregnated substance to obtain a powder, granule or plate.

[0008] The present invention is a mite control sheet suitable for use in situations where high safety is required, especially in direct contact with the body such as bedding such as futons and clothing such as clothes. The moisture absorbent is divided and packaged into a film or a nonwoven fabric having air permeability, and the film or the nonwoven fabric has a hygroscopic surface area of 0.2 m ² / sheet to 4.0 m ² / sheet, and the moisture absorption capacity per sheet at that time. , 25 ° C and 80%
is g / m ^2/1 or more days a mite dehumidification sheet. The moisture-absorbable surface area shows a remarkable difference in the mite control effect at a boundary of 0.2 m ² / sheet, and the effect is preferably 0.2 m ² or more,
The upper limit of 4.0 m ² is sufficient for ease of handling the sheet. Further, the moisture absorption capacity is such that the moisture absorption amount is 10 g / m ^2.
/ 1 day or less, the anti-mite effect is weak, and it is effectively 10 g / m
Is preferably at least ² / day, from practical viewpoint 100 g ^{/ m} 2 /
One day or more is desirable. In addition, as an effect of suppressing the growth and reproduction of mites, it is important to adjust the humidity particularly in places with high humidity, that is, by reducing the humidity, the mites can be efficiently controlled.

Further, the basis weight of the film or nonwoven fabric is 50
in the range of ^{g / m 2 ~100g / m 2} , the maximum pore size is 1mm or less. From the viewpoint of durability, if the basis weight of the film or the non-woven fabric is too small, the active ingredient is broken or leaked out during use, causing contamination and lacking in use strength. Conversely, if it is large, the air permeability deteriorates and the moisture absorption efficiency decreases,
Also, the usability decreases.

The humectant does not liquefy after absorbing moisture;
Uses silica gel, sepiolite, zeolite, calcium oxide, diatomaceous earth, activated carbon, activated clay, white carbon, sodium citrate, dibasic sodium phosphate, hygroscopic substances such as water-absorbing polymers, but there is no liquid leaching. It is suitable for clothes and clothes.Silica gel, sepiolite, activated carbon, zeolite, water-absorbing polymer, etc., which can regenerate moisture absorption by drying in the sun and heating, etc., restore moisture absorption and can be used many times. Therefore, it is effective as a countermeasure for the garbage problem, and has advantages such as a small economic burden.

The above-mentioned hygroscopic agent can be used after being processed into various forms. Granular ones can be used in order to increase the surface area and increase the hygroscopic ability. The average particle size of the moisture absorbent is preferably in the range of 100 μm to 5 mm. When the average particle size is 100 μm or less, dust tends to be formed at the time of filling, which is not desirable in a production environment. When the thickness is 5 mm or more, the moisture absorption rate becomes slow. Also, the sheet surface becomes uneven, making it difficult to use.

The sheet of the present invention is preferably divided and packaged.
The size can be freely changed according to the size of the place of use and the purpose of use. For example, the divided seal portion can be bent or cut into an appropriate size for use. In addition, it is also desirable to eliminate the possibility of the active ingredient in the package occurring depending on the place of use and handling, and to keep the sheet surface flat so that contact with ticks and moisture absorption can be performed efficiently. Although the size and number of the divisions are not particularly limited, each division size of the film or the nonwoven fabric is 3
The range of cm to 15 cm is preferred. When the size is 3 cm or less, the amount of the active ingredient is reduced, the sustaining effect is shortened, and the filling becomes difficult. In the case of a size of 15 cm or more, in particular, the active ingredient is formed in a granular form.

As the film or nonwoven fabric, a hydrophilic material and / or a material subjected to a hydrophilic treatment can be used. For example, examples of the hydrophilic nonwoven fabric include a heat pack series (manufactured by Nippon Paperboard Co., Ltd.) and a Stratec series (manufactured by Idemitsu Petrochemical Co., Ltd.). Use of the nonwoven fabric is effective because it increases the moisture absorption rate and increases the amount of moisture absorption. Further, the shape of the sheet is not limited to a rectangle, but may be changed according to the purpose of use, for example, by using a bag formed on a clothing cover. Further, it is possible to provide a handle or a hole in the sheet or to provide a means for connecting a plurality of sheets.

[0014] The mite-proof dehumidifying sheet of the present invention can be provided with an indicator that changes color tone so that its effective period can be visually recognized. As an indicator showing the moisture absorption state of the active ingredient, a metal salt that changes color tone can be treated on the sheet surface. Alternatively, a metal salt that changes color tone can be incorporated into the active ingredient as an indicator that indicates the moisture absorption state of the active ingredient. As the indicator, for example,
Examples thereof include anhydrous cobalt chloride and anhydrous copper sulfate, which change color due to moisture, which are colored by absorbing moisture and having crystal water. In addition, pH may cause color development or discoloration upon contact with water.
Indicator, redox indicator, diazo coupling substance,
Alternatively, a colored sheet or the like that has transparency when dry and transparency when wet can be used.

In addition, any conventionally known optional components can be blended within a range that does not impair the effects of the present invention. Depending on the situation where the anti-mite effect is further enhanced or the sustained effect is prolonged, the minimum amount of allethrin, tetramethrin, resmethrin, phenothrin, framethrin, permethrin, cyphenothrin, tralomethrin, empentrin, etofenprox, transfluthrin, etc. Pyrethroid compounds, DDVP, phenythion, fenitrothion, temefos, foxime, acephate, pyridafenthion, diazinon, etrimphos, malathion,
Organophosphorus compounds such as prothiophos, propetanphos, pyraclophos, chlorpyrifos, chlorpyrifosmethyl, carbamate compounds such as NAC, penthiocarp, propoxur, chitin synthesis inhibitors such as diflubenzuron and buprofezin, and juvenile hormone-like substances such as pyriproxyfen Drugs can be compounded or treated before use.

In order to prevent mold and odor, which are causes of mite growth and reproduction, examples of fungicides include carboxylic acid compounds or salts such as dehydroacetic acid, benzoic acid and sorbic acid, chlorhexidine gluconate, and the like. Halogen compounds such as bromcinnamaldehyde, resorcinol,
Phenolic compounds such as paraoxybenzoic acid esters, nitrile compounds such as 2,3,5,6-tetrachloroisophthalonitrile, benzimidazole compounds such as thiabentazole, 3-trifluoromethyl-
And carbanilide compounds such as 4,4'-dichlorocarbanilide. Examples of the deodorant and deodorant include deodorants such as zinc sulfate, aluminum sulfate, iron sulfate, magnesium carbonate, zinc oxide, and activated alumina; deodorants such as plant extract substances and enzymes.

The indoor dust mites to be controlled by the sheet of the present invention include Dermatophagoides farinae, Dermatophagoides farinae, Dermatophagoides farinae, Dermatophagoides farinae, Dermatophagoides farinae, Dermatophagoides farinae, Dust mites and Sasaranodani.

[0018]

Examples and Test Examples Hereinafter, the present invention will be described in detail with reference to Examples, Comparative Examples and various tests, but it is needless to say that the present invention is not limited to these Examples.

Test Example 1 Various hygroscopic substances were wrapped with a nonwoven fabric and divided and wrapped to prepare sheets, which were used as test sheets. A filter paper having a diameter of 9 cm was folded in two, and about 50 Dermatophagoides farinae were put inside the filter paper, and three sides were sealed with clips. 80% at 25 ° C
The sample was stored in RH, placed in a futon having reached an equilibrium state, and a test sheet was spread under the futon and stored as it was under the same conditions. The mites were scattered over a wide area so as to reach the center and both ends of the test sheet. When the test sheet was laid, the sheet was held upright and held in an extended state (in the case of granular active ingredients, those which were not divided and packaged were in an uneven state). After 1 day and 5 days, the filter paper was taken out, the clip was opened, the number of test insects and the number of dead insects were examined with a stereoscopic microscope, and the mortality was determined.

At this time, the sheet size is 0.4 m ² , and the division size of the divided packaging is 4 cm × 8.5 cm. FIG.
2 and FIG.

[Table 1]

(Test Results) By dividing and packaging, the hygroscopic agent can be dispersed in the sheet without bias, it is possible to efficiently dehumidify a large area, and the propagation of mites can be suppressed efficiently. In addition, the plate-shaped hygroscopic material can be dehumidified over a wide area without bias, so that the propagation of mites can be suppressed. If the active ingredient is granular and packaged without split packaging, the moisture absorbent is easily biased, it can only dehumidify a narrow range, and mites can escape to the one without moisture absorbent, ineffective.

Test Example 2 A sheet was prepared by dividing and packing various hygroscopic substances with a nonwoven fabric and used as a test sheet. About the difference of each moisture absorption, the acaricidal effect was investigated by the same method as Test Example 1.

[0023]

[Table 2]

[0024] As shown in (Test results) Table 2, moisture absorption is not sufficient for that effect is observed in the following 10 g ^{/ m} 2/1 day, 10 g ^{/ m} 2/1 day or more.

Test Example 3 Using the test sheet of Test Example 2, the rate of inhibition of mite growth due to the difference in each moisture absorption was investigated. About 30 Dermatophagoides farinae
5 g of a medium (powder feed M manufactured by Oriental Yeast Kogyo Co., Ltd. having a water content of 12%) adjusted to be 0 animals / g was placed in a futon having a size of 20 × 20 cm, and was heated at 25 ° C. 80%
After storing in RH for one day, the test sheet was laid under the futon and stored as it was under the same conditions. After a lapse of a predetermined number of days, 0.1 g of the medium was taken out of the futon, and the number of living mites in the medium was examined by a saline suspension method. When the proliferation was remarkable, it was diluted with a medium and the number of surviving mites was examined in the same manner. At the same time, the number of surviving mites in the untreated area without sheet treatment was investigated.
The growth inhibition rate was calculated. Growth inhibition rate = ｛(number of mites in untreated area-number of mites in treated area)
× 100 / mite count in untreated area 区

[0026]

[Table 3]

[0027] As shown in Test Results Table 3, moisture absorption is not sufficient for that effect is observed in the following 10g ^{/ m 2/1} day, 10g ^{/ m 2/1} day or more.

Test Example 4 Assuming a bed at bedtime, a practical effect was examined using the mite-proof and dehumidifying sheet of the present invention. Assuming a futon at bedtime,
Water was sprayed in advance to spread the moisture throughout the futon. After that, for the anti-moisture dehumidification effect, set a humidity meter in the middle and lower part of the futon, record the humidity data,
Humidity was investigated over time. About the mite prevention effect, about 100 mites were placed in the middle and lower part of the futon (mite was placed in filter paper and sealed with clips), and the number of deaths 12 hours later was investigated.

As shown in FIGS. 3 and 4, in the initial stage of use, the product of the present invention shows a high dehumidifying effect and an anti-mite effect, not only on the futon installation surface but also in the vicinity thereof.
I learned that a sufficient effect can be obtained in practical use.

[Brief description of the drawings]

Fig. 1 Divided and wrapped sheet

[Figure 2] Silica gel packaging sheet

FIG. 3 is a graph showing a moisture-proof effect.

FIG. 4 is a graph showing an anti-mite effect.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D052 AA09 CA02 CA03 CA08 CA09 GA04 GB00 GB02 GB03 GB12 GB13 HA00 HA01 HA03 HA05 HA12 HA13 HA21 HA23 HA24 HA27 HA34 HA38 HA49

Claims (5)

[Claims] 1. A sheet-shaped mite-proof dehumidifying sheet having a mite-proofing effect, wherein a moisture-absorbing agent as an active ingredient is divided and packaged into a film or a non-woven fabric having air permeability, and the film or the non-woven fabric can absorb moisture. surface area in 0.2 m ² / sheet ~4.0m ² / sheets, and mite dehumidification sheet moisture absorption capacity per sheet at 25 ° C. 80% RH is 10g ^{/ m 2/1} day or more. 2. The hygroscopic agent is silica gel, calcium chloride, magnesium chloride, potassium acetate, dibasic sodium phosphate, sepiolite, calcium oxide, diatomaceous earth, activated carbon, activated clay, zeolite, white carbon, sodium citrate, water absorption 2. The mite-proof and dehumidifying sheet according to claim 1, wherein the sheet contains at least one member selected from functional polymers. 3. The hygroscopic agent has an average particle size of 100 μm.
５5 mm, and the basis weight of the film or nonwoven fabric is 50
A ^{g / m 2 ~100g / m 2} , mite dehumidification sheet according to claim 1 or 2, wherein the maximum pore size is 1mm or less. 4. The mite-proof dehumidifying sheet according to claim 1, wherein each of the divided sizes of the film or nonwoven fabric divided and packaged is in a range of 3 cm to 15 cm on a side. 5. The mite-proof and dehumidifying sheet according to claim 1, wherein a means for changing a color tone is provided as an indicator for indicating the moisture absorption state of the moisture absorbent.