JP6971843B2 - Blower-mounted pest repellent sheet and space diffusion method for pest repellent - Google Patents

Description

The present invention relates to a method for spatially diffusing a pest repellent. The present invention also relates to a blower-mounted pest repellent sheet used for spatial diffusion of a pest repellent.

Conventionally, a method has been known in which the surrounding air is forcibly convected by an air flow generated from a blower such as an electric fan or an air conditioner, and volatile substances such as fragrances and pest repellents are diffused into the space.
For example, Patent Document 1 discloses an invention of a volatile substance dissipating device for an electric fan, which is fixed to a cover of an electric fan by using a band. Further, Patent Document 2 discloses an invention in which a substrate of a honeycam structure is impregnated with an insecticidal component such as pyrethroid and installed in an air outlet of an air conditioner or the like to diffuse the insecticidal component into the air (passive evaporation). There is. Further, Patent Document 3 discloses an invention of a device for attaching a tablet impregnated with a repellent or a fragrance to a fan and volatilizing it. Further, Patent Document 4 discloses an invention of a method of spraying a liquid containing a drug in the form of a fine mist and diffusing it into a room using a fan.

Japanese Unexamined Patent Publication No. 2007-051552 Special Table No. 11-504627 Gazette International Publication No. 2004/028249 Pamphlet Japanese Unexamined Patent Publication No. 2009-119335

However, with respect to a diffuser for fragrances and repellents using a blower, the inventions proposed so far have been to volatilize fragrances and repellents by using a carrier or a sprayer attached to a blower such as a fan. Many of them are related to the improvement of the method. From the viewpoint of spreading the repellent in the living space of a person to form a repellent space for pests, maintaining the repellent space for a long time, and giving a favorable fragrance to the room, at the same time. There is room for improvement in terms of forming a repellent space.

In general, fragrances and essential oils that have a repellent effect on pests have a spatial concentration (effective repellent amount) that exerts a repellent effect in space, which is several to ten times higher than that of insecticides such as pyrethroids, and humans smell. In the low concentration region where it cannot be felt, many of them do not exert a repellent effect. In addition, by perceiving the fragrance, it becomes possible to recognize that the repellent effect is sustained. Therefore, it is possible to quickly reach the spatial concentration that exerts the repellent effect and maintain the spatial concentration for a certain period of time, and in addition, maintain the spatial concentration that allows a person to perceive an odor with an appropriate sensory intensity for a certain period of time. Desired.

The invention of Patent Document 1 is a method of fixing a volatile substance dissipating container to a cover of an electric fan, and the invention of Patent Document 2 is a method of volatilizing pyrethroid-based insecticidal components such as transfluthrin and prarethrin. Neither 1 nor 2 mentions the adjustment of the spatial concentration of the fragrance having the repellent effect and the sensory intensity of the odor. The invention of Patent Document 3 is a method of mounting a tablet impregnated with a repellent or a fragrance on the back surface of an electric fan, and promotes volatilization of the repellent component from the tablet by a heating device. Further, the method described in Patent Document 4 sprays a large amount of water containing a chemical as a mist on a place where dust is scattered, such as a building dismantling site, industrial waste or a general waste treatment plant, and is inhabited by people. It is not considered for indoor use, let alone for adding fragrance.

In this way, the spatial concentration of volatile compounds such as fragrances that have a repellent effect on pests is sufficient to exert the repellent effect in a relatively short time, and the person feels that the odor is too strong. There has been a demand for a method that can maintain a repellent effect and a suitable odor intensity for several hours after reaching a certain level and once diffused.

As a method for diffusing fragrances and repellents using a blower, the present invention impregnates an aqueous solution in which a pest repellent such as a fragrance is dispersed into a sheet having a water retention capacity and attaches the blower to the blower. It has been found that a constant gas phase concentration can be quickly reached in an indoor space away from the space, and that the room is filled with a fragrance of moderate intensity while maintaining the spatial concentration.

The present invention relates to a method for spatially diffusing a pest repellent. The present invention also relates to a blower-mounted pest repellent sheet used for spatial diffusion of a pest repellent.
The present invention is a blower in which a pest repellent aqueous composition containing the following component (A) in an amount of 0.1% by mass or more and 20% by mass or less is held on a base sheet in an amount of 68% by mass or more and 750% by mass or less. The process of attaching the wearable pest repellent sheet to the blower so as not to come into contact with the rotating blades of the blower and not to obstruct the flow of air to the front of the blower, and the process of operating the blower indoors. It provides a method for spatial diffusion of pest repellents, including.
(A) Pest repellent having a vapor pressure of 0.00006 Pa or more and 210 Pa or less at 25 ° C.

Further, the present invention is the water absorption of the substrate sheet, the amount of pest repellent contained per sheet 1 cm ² is such that a 0.00037g / cm ² or more 0.177 g / cm ² or less in the range, the following An aqueous composition for pest repellent containing the components (A), (B) and (C) in the following proportions is retained, and the amount of the aqueous composition for pest repellent retained is relative to the mass of the base sheet. The present invention provides a blower-mounted pest repellent sheet having a content of 68% by mass or more and 750% by mass or less.
(A) Pest repellent having a vapor pressure of 0.00006 Pa or more and 210 Pa or less at 25 ° C.: 0.1% by mass or more and 20% by mass or less (B) Water: 70% by mass or more and 99.8% by mass or less (C) Water-soluble Sex alcohol: 0.1% by mass or more and 29.9% by mass or less

According to the space diffusion method of the pest repellent and the blower-mounted pest repellent sheet of the present invention, the pest repellent can be efficiently diffused, and the gas phase concentration in the space is shortened to the effective concentration at which the repellent effect is exhibited. The time can be reached and the effective concentration can be maintained for a long time. In addition, since it is not necessary to heat the pest repellent to dissipate it, it is easy to adjust the intensity of the fragrance when the fragrance component is blended.

FIG. 1 is a perspective view showing an example of an electric fan preferably used in carrying out the present invention. 2 (a) and 2 (b) are views of the fan shown in FIG. 1 as viewed from the back surface side of the protective cover, and FIG. 2 (a) is a blower-mounted type according to an embodiment of the present invention. The state before the pest repellent sheet is attached to the back surface portion of the protective cover is shown, and FIG. 2 (b) shows the state where the blower-mounted pest repellent sheet is attached to the back surface portion of the protective cover. FIG. 3 is a projection drawing of the back surface of the protective cover of the fan, the blades, and the blower-mounted pest repellent sheet attached to the back surface. 4 (a) to 4 (c) show a blower-mounted pest repellent sheet 1 attached to the back surface of the protective cover of the electric fan, and the area of the second region to which the sheet is attached is such that the sheet can be attached. It is a figure which shows the state which attached so that it becomes 60% or less of the area of one area. 5 (a) and 5 (b) show that the blower-mounted pest repellent sheet 1 can be attached to the back surface of the protective cover of the fan, and the area of the second region to which the sheet is attached is such that the sheet can be attached. It is a figure which shows the state which attached so that it may exceed 75% of the area of one area. FIG. 6 is a diagram showing the measurement results of the gas phase concentration of the pest repellent at a point 50 cm away from the fan as a result of the diffusion test of the pest repellent when the indoor air is forcibly convected by the fan. FIG. 7 is a diagram showing the measurement results of the gas phase concentration of the pest repellent at a point 1 m away from the electric fan as a result of the diffusion test. FIG. 8 is a diagram showing the measurement results of the gas phase concentration of the pest repellent at a point 2 m away from the electric fan as a result of the diffusion test. FIG. 9 is a schematic diagram showing an outline of the device used for measuring the repellent rate. FIG. 10 is a diagram showing the measurement results of the gas phase concentration of the pest repellent at a point 50 cm away from the fan as a result of the diffusion test of the pest repellent when the fan is not used. FIG. 11 is a diagram showing the measurement results of the gas phase concentration of the pest repellent at a point 1 m away from the electric fan as a result of the diffusion test. FIG. 12 is a diagram showing the measurement results of the gas phase concentration of the pest repellent at a point 2 m away from the electric fan as a result of the diffusion test. FIG. 13 is a diagram showing the results of sensory evaluation of the intensity of the scent, and is a diagram showing the results at a point 50 cm away from the electric fan. FIG. 14 is a diagram showing the results of sensory evaluation of the intensity of the scent, and is a diagram showing the results at a point 1 m away from the electric fan. FIG. 15 is a diagram showing the results of sensory evaluation of the intensity of the scent, and is a diagram showing the results at a point 2 m away from the electric fan.

Hereinafter, the present invention (a method for spatially diffusing a pest repellent and a blower-mounted pest repellent sheet) will be described based on the preferred embodiment thereof.
The method for spatially diffusing a pest repellent of the present invention is a blower-mounted pest repellent method in which an aqueous composition for pest repellent (hereinafter, also referred to as an aqueous composition) containing the pest repellent of the component (A) is held on a base sheet. A sheet (hereinafter also referred to as a pest repellent sheet) is used.

In the present invention, the pest repellent of the component (A) is a compound having a repellent effect against pests and has a vapor pressure of 0.00006 Pa or more and 210 Pa or less at 25 ° C. Here, examples of the pests to be repelled include mosquitoes, flies, stable flies, butterfly flies, gnats, cockroaches and the like.

The vapor pressure of the pest repellent of the component (A) is preferably 0.001 Pa or more, more preferably 0.001 Pa or more, from the viewpoint that the pest repellent can be sufficiently volatilized indoors by a blower and the gas phase concentration in the room is maintained. Is 0.1 Pa or more. Further, from the viewpoint of maintaining the gas phase concentration, it is preferably 100 Pa or less, more preferably 20 Pa or less. Further, from such a viewpoint, the vapor pressure is preferably 0.001 Pa or more and 100 Pa or less, and more preferably 0.1 Pa or more and 20 Pa or less.

Specific examples of the pest repellent of the component (A) include the following compounds. Table 1 shows the vapor pressures of these pest repellents.
2-Methoxy-4-propylphenol (dihydroeugenol), octahydro-7-methyl-1,4-methanonaphthalene-6 (2H) -one (precaton), 2,4-dimethyl-3-cyclohexene-1-methanol ( Floralol), 2,4,6-trimethylcyclohexa-3-ene-1-carbaldehyde (isocyclocitral), ethyl-2-phenylacetate, (2,4,6-trimethylcyclohex-3-en-1) -Il) Methyl (isocyclogeraniol), 3,4,4a, 5,6,7,8,8a-octahydrochromen-2-one (octahydrocoumarin), citral, citronellol, decanoic acid, geraniol, linalol, p-menthan-3,8-diol, phenylethylacetate, phenylethylpropionate, styralylpropionate, 1,8-cineole, (3aR, 5aS, 9aS, 9bR) -3a, 6,6,9a- Tetramethyl-2,4,5,5a,7,8,9,9b-octahydro-1H-benzo [e] [1] benzofuran (ambroxane: registered trademark), N, N-diethyl-3-methylbenzamide (ambroxane: registered trademark) DEET), 2- (2-hydroxyethyl) -1-piperidincarboxylic acid 1-methylpropyl ester (picaridin), d-aresulin, pyrethrin I, transfluthrin, metoflutrin, (1R) -2,2-dimethyl-3 -(2-Methyl-1-propenyl) cyclopropanecarboxylic acid 1-ethynyl-2-methyl-2-pentenyl (empentrin)

In the present invention, the content of the pest repellent of component A is 0.1% by mass or more and 20% by mass or less in the aqueous composition. Within this range, the pest repellent of component A can be easily transpired from the pest repellent sheet.
The content of the component (A) is preferably 0.3% by mass or more, more preferably 1.0% by mass or more, from the viewpoint of obtaining a repellent effect more reliably. Further, it is preferable from the viewpoint of enhancing the transpiration of the pest repellent, allowing the gas phase concentration in the space where the blower is installed to reach the effective concentration at which the repellent effect is exhibited at an early stage, and facilitating the maintenance of the effective concentration. It is 10% by mass or less, more preferably 7% by mass or less. Further, from the viewpoint of compatibility between them, it is preferably 0.5% by mass or more and 10% by mass or less, and more preferably 1.0% by mass or more and 7% by mass or less.

Further, the aqueous composition used in the present invention is also referred to as at least 2-methoxy-4-propylphenol (dihydroeugenol; hereinafter also referred to as DHE) as a pest repellent for the component (A) from the viewpoint of imparting a sufficient repellent effect. ), Octahydro-7-methyl-1,4-methanonaphthalene-6 (2H) -one (precaton), 2,4-dimethyl-3-cyclohexene-1-methanol (floralol), 3,4,4a, 5, It is preferable to contain at least one selected from 6,7,8,8a-octahydrochromen-2-one (octahydrocoumarin), citral, citronellol, geraniol, and linalool. The content of the above compound in the component (A) is preferably 20% by mass or more, more preferably 30% by mass or more.

Further, the pest repellent of the component (A) is DHE and the above-mentioned 2,4-dimethyl-3-cyclohexene-1-methanol (floralool), 3,4,4a, 5,6,7,8,8a-. It is preferable to use one or more selected from octahydrochromen-2-one (octahydrocoumarin), citral, citronellol, geraniol, linalool, and 1,8-cineole in combination. Further, from the viewpoint of the repellent effect and the strength of the scent, the total amount of DHE and the compound in the total amount of the component (A) pest repellent is preferably 50% by mass or more, more preferably 60% by mass or more, and further. It is preferably 70% by mass or more, more preferably 90% or more.

Further, as the pest repellent agent of the component (A), a plant essential oil or the like containing a compound having a pest repellent effect having a vapor pressure of 0.00006 Pa or more and 210 Pa or less at 25 ° C. as an active ingredient can be used. Such plant essential oils include geranium oil (active ingredient: geraniol, etc.), rose oil (active ingredient: geraniol, citronellol, etc.), eucalyptus oil (active ingredient: 1,8-cineole), rosemary oil (active ingredient: 1). , 8-Cineol, etc.), Laurel oil (active ingredient: 1,8-Cineol, etc.) and the like. When these are contained in an aqueous composition, the content of the pest repellent in the aqueous composition is a compound contained in the essential oil of the plant and having a vapor pressure of 0.00006 Pa or more and 210 Pa or less at 25 ° C. The ratio (% by mass) of (active ingredient) to the total amount of the aqueous composition.

Examples of the aqueous medium constituting the aqueous composition include water such as pure water, ion-exchanged water, alkaline ionized water, and natural water, and water-soluble alcohols. The water content of the component (B) in the aqueous composition is preferably 70% by mass or more and 99.8% by mass or less, more preferably 83% by mass or more, and further preferably 90% by mass or more. As the water, distilled water, ion-exchanged water, tap water, natural water and the like can be used, and it is preferable to use distilled water or ion-exchanged water.

Further, the aqueous composition of the present invention preferably contains the water-soluble alcohol of the component (C) for the purpose of enhancing the dispersibility of the pest repellent of the component (A). Examples of the water-soluble alcohol of the component (C) include lower alcohols having 2 to 3 carbon atoms such as ethanol, propanol and isopropanol; and polyhydric alcohols having 2 to 6 carbon atoms such as glycerin, propylene glycol, dipropylene glycol, ethylene glycol and diethylene glycol. Alcohol or the like can be used alone or in combination of two or more.
Among these, as the water-soluble alcohol of the component (C), it is preferable to use one or more alcohols selected from the group consisting of ethanol, propanol, isopropanol, glycerin, propylene glycol, dipropylene glycol, ethylene glycol and diethylene glycol. Further, it is more preferable to use ethanol, propanol or isopropanol from the viewpoint that when the sheet is impregnated, it is not sticky, easily volatilizes indoors together with a repellent and water, and the odor of alcohol itself is not too strong.

The content of the water-soluble alcohol of the component (C) is preferably 0.1% by mass or more and 29.9% by mass or less in the aqueous composition, from the viewpoint of enhancing the dispersibility of the component (A) pest repellent. , More preferably 0.3% by mass or more, and more preferably 10% by mass or less from the viewpoint that the odor of the alcohol itself is not too strong.

Further, in the present invention, the total content of the component (B) and the component (C) is preferably 60% by mass or more and 99.8% by mass or less, and more preferably 70% by mass or more and 99 in the aqueous composition. It is 8.8% by mass or less.

The aqueous composition used in the present invention may further contain a surfactant of the component (D) for the purpose of enhancing the dispersibility of the pest repellent.
As the surfactant of the component (D), one or more of a surfactant selected from a nonionic surfactant, a cationic surfactant, an anionic surfactant and an amphoteric surfactant is used. A nonionic surfactant is preferable from the viewpoint of being able to disperse the pest repellent and the fragrance component in an aqueous system and having excellent solubility. Further, from the viewpoint of enhancing the dispersion stability when the pest repellent is dispersed in an aqueous system, an amphoteric surfactant may be used in combination with the nonionic surfactant.

The nonionic surfactant preferably has an HLB value of 9 to 16, more preferably 9 to 15, and even more preferably 10 to 15. Here, the HLB value adopts Mr. Griffin's method (Refer to Surfactant Handbook, July 1960, Sangyo Tosho Co., Ltd., pp. 307-312), and the compound that cannot be obtained by Mr. Griffin's method is , The value obtained in the experiment (Refer to Surfactant Handbook, pp. 319-320).
Specific examples thereof include polyoxyethylene alkyl ether, polyoxyethylene glycol, polyoxyethylene polypropylene alkyl ether, and polyoxyethylene lauryl monoalkyl ether, and the average number of moles of ethylene oxide added is preferably 6 to 10, and alkyl is also preferable. The number of carbon atoms in is 12 to 14 is preferable.
Examples of the cationic surfactant include a primary amine salt, a secondary amine salt, a tertiary amine salt, and a quaternary ammonium salt.
Anionic surfactants include linear or branched alkylbenzene sulfonates, alkyl sulfates, alkenyl sulfates, alkane sulfonates, alkyl polyvalent alcohol ether sulfates, higher fatty acid salts, alkyl ether carboxylates or alkenyl. Examples include ether carboxylate.

Examples of the amphoteric surfactant include amidopropylamine oxides (obtained by reacting an amide compound of lauric acid and dimethylaminopropylamine with hydrogen peroxide) having an alkyl group or an alkenyl group, alkyl or alkenylamine oxides, and the like. Alternatively, dimethyllaurylamine oxide; dimethylaminoacetic acid betaine, imidazolinium betaine and the like can be mentioned.
The surfactant may be used alone or in combination of one or more. The content of the surfactant in the pest repellent aqueous composition is preferably 0.001% by mass or more, preferably 20% by mass or less, more preferably 5% by mass or less, still more preferably 0.005. It is less than mass%.

An aromatic component may be further added as the component (E) to the aqueous composition used in the present invention. The aromatic components are preferably δ-nononalactone, ethylene brassylate, acetylsedrene, (E) -2-ethyl-4- (2,2,3-trimethyl-1-cyclopentane-3-enyl) butane-. 2-En-1-ol (bangalol), E) -2-methyl-4- (2,2,3-trimethyl-1-cyclopentane-3-enyl) butane-2-en-1-ol (sandals) Mysolcore), 3- [5,5,6-trimethylbicyclo [2.2.1] heptane-2-yl] cyclohexane-1-ol (Sandal sync = isobornylcyclohexanol). One or more types can be used.
The content of the component (E) aromatic component in the aqueous composition is preferably 0.001% by mass or more, more preferably 0.01% by mass or more, still more preferably 0.1% by mass or more, and more preferably. Is 14% by mass or less, more preferably 7% by mass or less, still more preferably 5% by mass or less.

As the water-absorbent base sheet used in the present invention, using a highly water-absorbent base sheet suppresses the concentration of the pest repellent in the aqueous composition to a low level, while supporting a large amount of the aqueous composition. By doing so, the pest repellent can be efficiently evaporated, and the gas phase concentration in the space where the blower is installed can reach the effective concentration that exerts the repellent effect at an early stage, and the effective concentration can be maintained for a long time. Is preferable because it enables.
From such a viewpoint, the maximum water retention rate of the base material sheet is preferably 68% by mass or more and 1000% by mass or less, more preferably 200% by mass or more and 800% by mass or less, and preferably 200% by mass or more and 750% by mass. % Or less.

The maximum water retention rate is measured in accordance with JIS L1913: 2010 "Measurement method of water retention rate" of 6.9.2 "Measurement method of water retention rate" of the general nonwoven fabric test method. The specific procedure is as follows.
<Procedure>
1) Three 100 mm × 100 mm test pieces were collected from the sample, and the mass was measured up to 1 mg.
2) Put about 1 L of purified water in a 2 L beaker, soak the test piece for 15 minutes, pinch one corner of the test piece with tweezers, remove it from the water, and leave the test piece for 5 minutes without touching the instrument wall. After dripping water, the mass was measured up to 1 mg.
3) The water retention rate was calculated by the following formula, the average value was obtained, and the value with one decimal place was calculated by the rounding method.
Water retention rate m (%) = (m2-m1) / m1 × 100
m1: Mass of test piece in standard state (mg)
m2: Mass (mg) after wetting the test piece and dripping water

Further, in the present invention, the amount of the aqueous composition to be retained with respect to the base sheet is preferably 68% by mass or more and 750% by mass or less, more preferably 180% by mass or more and 750% by mass or less. It is preferable, more preferably 200% by mass or more and 750% by mass or less. While keeping the concentration of the pest repellent in the aqueous composition low, by increasing the amount of the aqueous composition to be carried, the pest repellent can be efficiently transpired, and the gas phase concentration in the space where the blower is installed. Can reach an effective concentration that exerts a repellent effect at an early stage. The amount of the aqueous composition is a value obtained by expressing the ratio of the mass of the pest repellent aqueous composition to be retained on the substrate sheet to the mass of the substrate sheet before retaining the pest repellent aqueous composition as a percentage. And is shown as a retention rate (%) in Table 2.

The base material sheet is preferably composed of a fiber sheet made of fibers, and the fiber sheet is preferably a non-woven fabric sheet or a woven fabric sheet. Examples of the nonwoven fabric constituting the nonwoven fabric sheet include an air-through nonwoven fabric, a spunbonded nonwoven fabric, a spunlaced nonwoven fabric, a meltblown nonwoven fabric, a resin bonded nonwoven fabric, a needle punched nonwoven fabric, and a heat roll nonwoven fabric. The non-woven fabric sheet includes not only a non-woven fabric having a single-layer structure, but also a laminated body of a plurality of non-woven fabrics, a laminated body of a non-woven fabric and a net-like material, and the like.
The fiber sheet such as a non-woven fabric sheet constituting the base material may contain hydrophilic fibers in the constituent fibers of the fiber sheet in an amount of 30% by mass or more and 100% by mass or less from the viewpoint of forming a fiber sheet having a high maximum water retention rate. It is more preferable that the hydrophilic fibers are contained in the constituent fibers of the fiber sheet in an amount of 70% by mass or more and 100% by mass or less. Examples of the hydrophilic fiber include synthetic fibers having a relatively high hydrophilicity such as cellulosic fibers such as pulp, rayon and cotton. It is more preferable that the fiber sheet constituting the base material sheet contains one or more kinds of hydrophilic fibers selected from the group consisting of pulp, rayon and cotton fibers in the above ratio.

As a fiber sheet such as a non-woven fabric sheet, a fiber sheet having a plurality of holes formed in a predetermined pattern can also be used. For example, the fiber sheet shown in FIG. 1 of JP-A-2014-108307 can also be used as the base material sheet in the present invention.
The basis weight of the base material sheet is not particularly limited, ^{but is preferably 30 g / m 2} or more, more preferably 40 g / m ² or more, and further preferably 50 g / m ² from the viewpoint of obtaining a high water retention rate. Further, from the viewpoint of ease of handling and the like, 500 g / m ² or less is preferable, and more preferably 200 g / m ² or less.

The method of supporting (holding) the aqueous composition on the substrate sheet is not particularly limited, and for example, a bar coater, a gravure coater, various roll coaters, etc. are used in addition to a spray method, a brush coating method, and a dipping method. Examples include a coating method. Among these, the spray method or the dipping method is preferable from the viewpoint of increasing the water retention rate of the fiber without compressing the fine void structure of the fiber as much as possible.

Pest repellent aqueous composition is preferably loaded so that the amount of component (A) pest repellent contained per sheet 1 cm ² is 0.00037g / cm ² or more 0.177 g / cm ² or less in the range ..
By supporting the carrier so that the amount of the carrier is within such a range, the concentration of the repellent in the space can be maintained for a certain period of time, and the effective concentration can always be maintained.
By supporting the aqueous composition on the base sheet, the blower-mounted pest repellent sheet of the present invention can be obtained. It is preferable to store, store, and transport the pest repellent sheet in a closed container, either individually or in a state where a plurality of sheets are stacked.

Next, a method of using the above-mentioned pest repellent sheet will be described. The description of the usage method is also a description of one embodiment of the space diffusion method of the pest repellent of the present invention.
When using the pest repellent sheet, the pest repellent sheet is taken out from the closed container, for example, and attached to a blower.
Examples of the blower include a fan, a circulator, an air conditioner, and the like, but it is preferable to use a widely used fan from the viewpoint that the pest repellent can be easily dissipated.

In the step of attaching the pest repellent sheet to a blower such as a fan, the pest repellent sheet is attached so as not to come into contact with the rotating blades of the blower and to prevent the air flow to the front of the blower. For example, as shown in FIG. 1, in general, the electric fan 2 is arranged in an electric motor (not shown) arranged in a motor unit 3, a blade 4 rotated by the electric motor, and a front side of the blade 4. It has a blade protective cover 5 consisting of a front cover 51 and a rear cover 52 arranged on the rear side of the blade 4, and a support portion 6 for supporting the motor portion 3 and the like from below. When 1 is attached to such a fan 2, for example, as shown in FIG. 2 (b) or FIG. 2 (c), the pest repellent sheet 1 is attached to the back surface of the protective cover 5 made of the rear cover 52, and the back surface thereof. It is preferable to attach the portion so that it is partially covered. By attaching to such a state, the pest repellent sheet 1 is attached in a state where it does not come into contact with the rotating blades 4 of the fan 2 (blower) and does not obstruct the air flow to the front of the fan 2 (blower). .. Attaching the pest repellent sheet 1 to the back surface of the protective cover 5 made of the rear cover 52 means that the pest repellent sheet 1 is easily attached so as not to obstruct the flow of air to the front of the fan 2 (blower). It is preferable because it can be used.

When the blower is a fan, in order to attach the pest repellent sheet 1 in a state that does not obstruct the flow of air to the front of the fan 2 (blower), as shown in FIG. In a projection drawing, the pest repellent sheet 1 attached to the back surface side (rear side of the blade) of the protective cover 5 is projected onto a plane orthogonal to the center line 41 of the rotation axis of the blade 4 in parallel with the center line 41. With the contour line 43c of the projection portion of the non-ventilated portion 43 formed in the central portion of the back surface portion of the protective cover 5 and the projection line of the locus of the outermost end of the blade 4 by fixing the motor portion 3. When the area between the circle 42 and the sheet is the first area to which the sheet can be attached, and the area of the fan-mounted pest repellent sheet 1 projected on the first area is the second area to which the sheet is attached. The area S2 of the second region is preferably 75% or less, more preferably 70% or less, still more preferably 60% or less of the area S1 of the first region. On the other hand, the area S2 of the second region is preferably 3% or more, more preferably 10% or more of the area S1 of the first region.

4 (a) to 4 (c) show an example in which the pest repellent sheet 1 is attached so that the area S2 of the second region is 60% or less of the area S1 of the first region, FIGS. 5 (a) and 4 (c). FIG. 5B is a diagram showing an example in which the pest repellent sheet 1 is attached so that the area S2 of the second region is more than 75% of the area S2 of the first region. When the area S2 of the two regions was attached so as to be 60% or less of the area S1 of the first region, it was confirmed that the air flow reached a position 2 m in front of the fan 2, and the pest repellent sheet 1 was attached. When the area S2 of the second region is installed so as to exceed 75% of the area S1 of the first region, air flows in the vertical direction from the front of the fan 2, and the air flow in the front is clearly obstructed. It was confirmed that.
As described above, when the area S2 of the second area to which the sheet is attached is 60% or less of the area of the first area to which the sheet can be attached when the pest repellent sheet 1 is attached, at least in front of the blower. It can be said that it was installed in a state that does not obstruct the flow of air to. Here, the degree to which the air flow is not obstructed is a wind speed at a point 2 m away from the blower, at least to the extent that the wind is felt on the cheeks (Beaufort wind class table; sutra wind).

According to one embodiment of the blower-mounted pest repellent sheet of the present invention and the space diffusion method of the pest repellent of the present invention, the pest repellent sheet is thus not in contact with the rotating blades of the blower, and the pest repellent sheet is not in contact with the rotating blades of the blower. By attaching the blower to the blower in a state that does not obstruct the flow of air to the front of the blower, the pest repellent carried on the base sheet can be efficiently dissipated in the vicinity of the blower to which the sheet is attached. By blowing air from the blower, the gas phase concentration in the space where the blower is installed can reach an effective concentration that exerts a repellent effect in a short time, and the effective concentration can be maintained for a long time. In addition, heating is not required to dissipate the pest repellent, and when an aromatic component is added, the intensity of the aromatic can be easily adjusted.

In the present invention, after the pest repellent sheet is attached to the blower, the blower is operated indoors. It is preferable to operate the blower continuously for 5 minutes or more from the viewpoint of keeping the pest repellent in a wide range in the room at an effective concentration or higher, and more specifically, 120 minutes after attaching the pest repellent sheet to the blower. It is preferable to operate continuously as described above.
Further, when the pest repellent sheet is used on the back surface of the protective cover of the electric fan, it is possible to replenish the pest repellent sheet with the pest repellent aqueous composition while operating the electric fan. For example, by spraying the pest repellent aqueous composition filled in the spray container onto the pest repellent sheet every few hours, the pest repellent can be continuously diffused from the pest repellent sheet attached to the electric fan.

The space diffusion method of the blower-mounted pest repellent sheet of the present invention and the pest repellent of the present invention is not limited to the above-described embodiment and can be appropriately changed.
For example, as a method of attaching the pest repellent sheet to the state shown in FIG. 2B or FIG. 2B, one annular sheet may be attached, or a plurality of sheets may be arranged side by side to form an annular shape. May be attached to. Further, when a plurality of pest repellent sheets are attached to one fan, the shape of each sheet can be any shape such as a circle, a triangle, a quadrangle, a rhombus, and a fan. As a method of attaching the pest repellent sheet, a clip such as a double clip may be used, or a string, rubber, a magnet or the like may be used for fixing. In addition, a part of the pest repellent sheet can be fixed in a state of being positioned on the front side of the protective cover. However, even in that case, it is preferable that more sheets are present on the back surface side of the protective cover than on the front surface portion side.

Further, the blower-mounted pest repellent sheet in the present invention is divided into a base sheet before holding the pest repellent aqueous composition and a pest repellent aqueous composition, and the base sheet and the pest repellent contained in the container are used. It can also be sold as a set of aqueous compositions. In that case, the set is impregnated with the pest repellent aqueous composition on the base sheet, and the base sheet impregnated with the pest repellent aqueous composition is fixed to the back side of the blower (the back surface of the fan, etc.). It is preferable to attach a description stating that it is used. As for the attached method, the instruction manual may be enclosed in the packaging box containing the set, or the explanation may be displayed on the packaging box, the container containing the pest repellent aqueous composition, or the like. The container containing the pest repellent aqueous composition may be a spray container.

Further, the following method for manufacturing a composite sheet and an apparatus for manufacturing a composite sheet are disclosed with respect to the above-described embodiment (aspect) of the present invention.

Hereinafter, the present invention will be described in more detail based on examples. However, the present invention is not limited to these examples.
<Preparation of aqueous composition for pest repellent>
The compositions (a) to (e) shown in Table 2 were prepared as an aqueous composition for pest repellent. The compositions (a) to (e) contain pest repellents in the composition in an order of 3.9% by mass, 13.9% by mass, 60% by mass, 60% by mass and 4.0% by mass. The compounds used as pest repellents for component (A) in the preparation of the compositions shown in Table 2 were 2-methoxy-4-propylphenol (also known as dihydroeugenol) and octahydro-7-methyl-1. , 4-Methoxynaphthalene-6 (2H) -on: (Plicatone), these compounds are also used as fragrances and are available as commercially available reagents or fragrance compounds.

<Diffusion test of pest repellent when indoor air is forcibly convected with a fan>
The pest repellent aqueous composition shown in Table 2 was impregnated into 6 sheets of cellulose non-woven fabric cut into 13 cm × 20.5 cm, respectively, to protect the fan (EF-S30R2 (L) type 30 cm living fan manufactured by Sanyo Electric Co., Ltd.). As shown in FIG. 2B, a clip (not shown) was attached to the back surface of the cover so that the central portion of the rotation axis of the blade was concentrically open. The non-woven fabric was mounted in combination so that the area of the second region to which the sheet was attached was 60% of the area of the first region to which the sheet could be attached. Each non-woven fabric was a spunlace non-woven fabric and had a basis weight of 60 g / m ² .
The total amount of the pest repellent aqueous composition impregnated in the non-woven fabric is 40 g for the composition (a), 11.2 g for the composition (b), 2.6 g for the composition (c), and 1 for the composition (d). .3 g and 11.2 g of the composition (e), and for the compositions (a) to (c), the total amount of the pest repellent impregnated in the nonwoven fabric was adjusted to 1.56 g. The composition (d) was adjusted so that the total amount of the pest repellent impregnated in the nonwoven fabric was 0.78 g. Regarding the composition (e), the total amount of the pest repellent impregnated in the nonwoven fabric was adjusted to 0.44 g, which is a little less than one-third of the compositions (a) to (c).
^{The amount of the pest repellent contained in 1 cm 2} of the sheet at this time ^{is 0.0023 g / cm 2 for} the compositions (a), (b) and (c), and 0.0011 g / cm for the composition (d). cm ^2, the composition (e) was 0.00065g / cm ^2.

The place where the diffusion test was conducted was a room with a frontage of 2.5 m, a depth of 5.5 m, a floor area of 7.5 tatami mats (about 13.7 m ² ), a height of 2.5 m, and a volume of 42.5 m ³ (room temperature). 20.0 to 23.3 ° C., relative humidity 52 to 60%), and the windows were closed to prevent convection from the outside without a fan.
The location of the fan is such that the position of the front cover of the fan is about 0.8 m from the entrance, the rotation axis of the fan is 90 cm above the floor, and the air from the fan enters the room side in parallel with the floor. I installed it so that it would go straight toward the other side (do not shake my head). Furthermore, a suction tube for collecting indoor air at a height of 90 cm, which is the same as the rotation axis of the fan, is made of metal at each point of distances of 0.5 m, 1.0 m, and 2.0 m from the front cover of the fan. It was installed using the stand of. The adsorption tube (TDU tube) was a glass tube having an outer diameter of 6 mm (inner diameter of 4 mm) and a length of 5 cm, and the inside was filled with Tenax resin as an adsorbent. Each suction tube was connected to a small suction pump, and suction was performed at a suction flow rate of 70 mL / min. The air was collected by the suction pipe immediately after the fan was switched on, 30 minutes later, 1 hour later, 2 hours later, and 4 hours later, and the time required for one collection was about 7 minutes. rice field.
The adsorption tube used for collection was set as it was in the heat desorption device, and the collected pest repellent was injected into the GC-MS device for quantitative analysis.
Table 3 shows the GC-MS analysis conditions.

Ｔｅｎａｘ管に吸着した害虫忌避剤の定量値は、分析対象とする化合物のイオンフラグメントのピークエリアを、予め算出した検量線に代入し算出することで求めた。ジヒドロオイゲノールの定量においては、イオンフラグメント１３７（Ｍ／Ｚ）のピークを検出に用いた。

The quantitative value of the pest repellent adsorbed on the Tenax tube was calculated by substituting the peak area of the ion fragment of the compound to be analyzed into a calibration curve calculated in advance. In the quantification of dihydroeugenol, the peak of ion fragment 137 (M / Z) was used for detection.

Further, in the diffusion test, since an odorous fragrance compound was used as a pest repellent, the intensity of the scent when used indoors was sensory-evaluated at the same time as the air was collected by the adsorption tube. The evaluation was carried out by a panel of 2 to 3 experts on the following 6-level intensity scale, and the intensity of the scent was determined through discussions with the panel.
<Evaluation scale of fragrance intensity>
The intensity of the scent was evaluated by the following 6-step intensity scale.
0: Odorless 1: Smell that can be finally perceived 2: Smell that can be perceived 3: Smell that can be easily perceived 4: Smell that can be clearly perceived 5: Smell that can be strongly perceived

FIGS. 6 to 8 show the measurement results of the gas phase concentration of dihydroeugenol (hereinafter abbreviated as "DHE") when the compositions (a) to (d) were impregnated into the non-woven fabric and attached to a fan to volatilize. Shown in. 6 to 8 show the measurement results when the positions of the Tenax pipes from the electric fan are 50 cm, 1 m, and 2 m.
Comparing the gas phase concentration measurement results of the composition (a) and the compositions (c) and (d), the composition (a) (DHE 1.9% aqueous solution, pest repellent concentration 3.9%) is a composition. (C) The gas phase concentration of DHE is higher than that of any of (DHE 30% aqueous solution, pest repellent concentration 60%) and composition (d) (DHE 60% aqueous solution, pest repellent concentration 60%), and the gas phase concentration of DHE is higher at almost all points. It was found that the effective concentration for repelling mosquitoes was exceeded. As the effective concentration for mosquito repellent, a value of 1.3 nmol / L, which is a gas phase concentration at which the mosquito repellent rate is 50% with DHE alone, was used.
On the other hand, for the compositions (c) and (d) which are 30% or 60% aqueous solutions of DHE, as shown in FIGS. 6 to 8, mosquito repellent is repelled at all measurement positions and at all measurement times. Nothing exceeded the effective concentration.
From the results of this test, even if the content of the pest repellent is the same, the volatilization behavior changes due to the difference in the amount of water and the amount of the aqueous solution, and the content of the pest repellent in the composition is 20% by mass or less. By doing so, it can be seen that the gas phase concentration in the space where the blower is installed can reach the effective concentration that exerts the repellent effect in a short time, and the effective concentration can be maintained for a long time.

The mosquito repellent rate was determined by the following method.
A box-type device having an inner size of 170 cm and a small box having an inner size of 60 cm are prepared in terms of width, depth and height. As shown in FIG. 9, the box-type device and the small box are arranged adjacent to each other, and a communication port having a length of 14.5 × a width of 24 cm is provided on the contact surface. A suction tube (TDU tube) was installed in the box-shaped device of the communication port. The suction tube was connected to a small suction pump via a silicon tube. In addition, a partition plate was provided at the communication port so that it could be opened and closed. A 14.5 x 24 cm air supply window is provided at the bottom of the surface corresponding to the surface where the communication port of the box-shaped device is provided, and a pipe chair is provided so that the subject's calf is located in front of the air supply window. A commercially available diffuser (1.67 ml / min) was installed next to the pipe chair. The small box was provided with an exhaust port having a diameter of 15 cm near the center of the surface corresponding to the surface provided with the communication port, and a small fan was installed outside the exhaust port. In addition, 20 female mosquitoes were placed in the small box.
The test was performed twice, when the control shown in Table 4 was used and when the DHE aqueous solution was used.
The subject was seated in a pipe chair, and the diffuser filled with 300 ml of the aqueous solution shown in Table 4 was operated after 5 minutes. After that, the partition plate and the air supply window were opened, a small fan was operated, and a small pump connected to the suction pipe was operated at a suction flow rate of 100 mL / min to suck the air flow near the communication port. After 5 minutes, the partition plate and the intake window were closed, the small fan was stopped, and the suction was stopped.
The adsorption tube after the test was set as it was in the heat desorption device, and the collected pest repellent was injected into the GC-MS device for quantitative analysis. The DHE concentration when the DHE aqueous solution was used was 1.3 nmol / L.
The number of mosquitoes that moved from the small box to the box-type device was 10 in the control test, whereas it was 3 in the DHE aqueous solution test, and the number of mosquitoes that moved from the control test was 70. % Was suppressed. If the DHE concentration is 1.3 nmol / L, the number of mosquitoes that move sufficiently is suppressed by 50% even if the error of the test is included. The DHE concentration in the test was set to a 50% repellent effective concentration.

Further, the measurement results of the vapor phase concentration of dihydroeugenol when the composition (e) was impregnated into the non-woven fabric and mounted on a fan to be volatilized are shown in Table 5 together with the results of the above-mentioned compositions (a) and (b). Shown in. Table 5 shows the measurement results of the gas phase concentration after 30 minutes of the pest repellent (DHE) at the points 1 m and 2 m away from the electric fan.

The composition (e) has a retention rate of 200% and the same retention rate as the composition (b), and the concentration of the pest repellent is the same as that of the composition (a). That is, the mass of the component (A) supported on the base sheet of the composition e is much smaller than that of the compositions a and b, which is about 1/3.
From the results in Table 5, also for the composition (e), a thin aqueous solution having a sufficiently high vapor phase concentration after 30 at a position 1 m or 2 m away from the fan and a low concentration of the pest repellent was used as the base sheet. It was confirmed that high volatility was obtained by using the supported sheet.
From these results, it is preferable that the pest repellent aqueous composition carries an amount of at least 200% or more based on the mass of the base sheet.

<Diffusion test of pest repellent when not using a fan>
In order to compare the diffusion behavior of the pest repellent into the room between the case where indoor air is forcibly convected by a fan and the case where only natural convection is used without using a fan, a non-woven fabric is attached to the fan and no air is blown. A comparative control test was conducted in these cases.
10 to 12 show the measurement results of the gas phase concentration at positions of 50 cm, 1 m, and 2 m from the electric fan to the Tenax tube. In each figure, the blast indicates the time when the fan is switched on and the air is blown, and the stationary means the result when the fan is switched off and stopped. The composition having the same composition as the above-mentioned composition (a) was used for both blowing and stationary.
Comparing the results of gas phase concentration measurement with and without wind from the fan, no mosquito repellent effective concentration was exceeded at all measurement positions at all measurement positions when the fan was stationary and not blown.

<Evaluation result of odor strength of pest repellent>
The results of the sensory evaluation of the scent intensity performed at the same time as sampling in the gas phase concentration measurement are shown in FIGS. 13 to 15 below.
According to the results of this test, it was shown that the sheet or method of the embodiment of the present invention shows that the odor of the repellent that fills the room when the pest repellent is diffused is not unpleasant.

1 Blower-mounted pest repellent sheet 2 Fan (blower)
3 Motor part 4 Blade 5 Protective cover 51 Front cover 52 Rear cover 6 Support part

Claims (7)

The water absorption of the substrate sheet, so that the amount of pest repellent contained per sheet 1 cm ² is 0.00037g / cm ² or more 0.177 g / cm ² or less in the range, the following components (A), ( A pest repellent aqueous composition containing B) and (C) in the following proportions is retained, and the retained amount of the pest repellent aqueous composition is 68% by mass or more and 750 with respect to the mass of the base sheet. Blower-mounted pest repellent sheet with a mass of% or less.
(A) Pest repellent having a vapor pressure of 0.00006 Pa or more and 210 Pa or less at 25 ° C.: 0.1% by mass or more and 20% by mass or less (B) Water: 70% by mass or more and 99.8% by mass or less (C) Ethanol Water-soluble alcohol, which is one or more of alcohols selected from the group consisting of propanol, isopropanol, glycerin, propylene glycol, dipropylene glycol, ethylene glycol, and diethylene glycol : 0.1% by mass or more and 29.9% by mass or less. The blower-mounted pest repellent sheet according to claim 1, wherein the pest repellent aqueous composition further contains the following component (D) in the following ratio.
(D) Surfactant: 0.001% by mass to 20% by mass The pest repellent of component (A) is the active ingredient of the pest repellent effect.
2-Methoxy-4-propylphenol, Octahydro-7-Methyl-1,4-methanonaphthalene-6 (2H) -one, 2,4-dimethyl-3-cyclohexene-1-methanol, 3,4,4a, 5 , 6,7,8,8a-Octahydrochromen-2-one, citral, citronellol, geraniol, linalool, which comprises at least 20% by mass in total in the total active ingredient. The blower-mounted pest repellent sheet according to 1 or 2. Said pest repellent aqueous composition further as component (E), containing one or more aroma components selected from the group consisting of the following compounds 0.001 wt% to 14 wt% or less, according to claim 1 to 3 The blower-mounted pest repellent sheet according to any one of the above items.
δ-Nonalactone, ethylene brassylate, acetylsedrene, (E) -2-ethyl-4- (2,2,3-trimethyl-1-cyclopentane-3-enyl) butane-2-en-1-ol, E) -2-Methyl-4- (2,2,3-trimethyl-1-cyclopentane-3-enyl) Butane-2-en-1-ol, 3- [5,5,6-trimethylbicyclo [2] .2.1] Heptane-2-yl] Cyclohexane-1-ol. The blower-mounted pest repellent sheet according to any one of claims 1 to 4.
A space for pest repellent, including a step of attaching the blower to the blower without contacting the rotating blades of the blower and not obstructing the flow of air to the front of the blower, and a step of operating the blower indoors. Spreading method. The method for spatially diffusing a pest repellent according to claim 5, wherein the blower is a fan, and the position where the blower-mounted pest repellent sheet is attached is the back surface of the protective cover of the fan. The ratio of the area (S2) of the second region to which the blower-mounted pest repellent sheet is attached to the area (S1) of the first region to which the blower-mounted pest repellent sheet can be attached on the back surface is 75% or less. A method for spatially diffusing a pest repellent according to claim 6.

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