Pest control sheet

Abstract

To provide a pest control sheet sufficiently volatilizing a repellent or pesticide impregnated therein, capable of preventing the repellent or pesticide from sticking to a user's fingers even when touched, and preventing the repellent or pesticide from transferring to the user's tongue even when licked.SOLUTION: A pest control sheet comprises a chemical-retaining layer impregnated with at least one of a repellent and a pesticide, a barrier layer provided on one side of the chemical-retaining layer and impermeable to the repellent or the pesticide, a pressure-sensitive adhesive layer provided on the opposite side of the chemical-retaining layer in the barrier layer and adhering to an adherend, and a permeable layer 4 provided on the other side of the chemical-retaining layer and permeable to the repellant and the pesticide, where the permeable layer 4 includes a plurality of through-holes 41, the area of the through-holes 41 is 0.01-40 mm2, and the thickness of the permeable layer 4 is 0.03 to 2 mm.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pest control sheet that is attached to the skin or clothing of a user or placed in a specified location to repel or exterminate pests such as mosquitoes and horseflies in order to prevent damage from pests, such as by preventing insect bites by these pests. [Background technology]

[0002] Conventionally, in order to prevent damage from pests, such as by preventing bites from pests such as mosquitoes and horseflies, pest repellent sheets and the like that have a pest repellent layer containing a volatile compound having pest repellency have been known. The pest repellent sheet is attached to the skin or clothing of a user, or placed in a specific storage container, and the compound, which is an active ingredient, gradually volatilizes from the pest repellent layer, thereby preventing damage from pests by keeping them away.

[0003] As such a pest control sheet, for example, Patent Document 1 discloses a pest control sheet having a drug retention layer impregnated with at least one of a repellent or an insecticide, a barrier layer provided on one side of the drug retention layer and which is impermeable to the repellent or insecticide, and an adhesive layer provided on the barrier layer on the opposite side to the drug retention layer and which can be adhered to an object to be adhered to. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-137668 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the invention of Patent Document 1, the drug retention layer can be touched by the user, and therefore, depending on the type of repellent or insecticide, there is a risk of experiencing symptoms of poisoning such as overdose, vomiting, diarrhea, headache, and tinnitus upon contact. On the other hand, if the user is prevented from touching the drug retention layer to prevent such symptoms of poisoning, the repellent or insecticide will not volatilize sufficiently, which is a contradictory problem.

[0006] Therefore, the present invention aims to provide a pest control sheet that has a control effect of repelling or exterminating pests, such as mosquitoes and horseflies, when attached to the skin or clothing of a user or placed in a specified location in order to prevent damage from pests, such as by preventing bites from these pests, and that sufficiently volatilizes the repellent or insecticide, and prevents the repellent or insecticide impregnated in the drug retention layer from sticking to the user's fingers even if the user touches the pest control sheet with their fingers, and prevents the repellent or insecticide impregnated in the drug retention layer from transferring to the tongue even if the user licks the pest control sheet with their tongue. [Means for solving the problem]

[0007] [1] That is, the present invention provides a method for producing a repellent-permeable layer (4) that is provided on the other side of the drug retention layer (1) and is permeable to the repellent or the insecticide, a barrier layer (2) that is provided on one side of the drug retention layer (1) and is impermeable to the repellent or the insecticide, an adhesive layer (3) that is provided on the barrier layer (2) on the opposite side of the drug retention layer (1) and is adherent to an object to be adhered, and a permeable layer (4) that is provided on the other side of the drug retention layer (1) and is permeable to the repellent and the insecticide, wherein a plurality of through holes (41) are formed in the permeable layer (4), and the area of ​​the through holes (41) is 0.01 to 40 mm 2 The pest control sheet is characterized in that the thickness of the permeable layer (41) is 0.03 to 2 mm.

[0008] [2] The pest control sheet according to [1] above, characterized in that the ratio of the area of ​​the through holes to the thickness of the permeable layer is (area of ​​the through holes) / (thickness of the permeable layer)=0.3 to 40.

[0009] [3] The pest control sheet according to either [1] or [2], characterized in that the through holes (41) of the permeable layer (4) are formed as mesh-like gaps.

[0010] [4] The pest control sheet according to any one of [1] to [3], wherein the permeable layer (4) is made of one material selected from polyolefin, fluororesin, polyethylene terephthalate, and ethylene-vinyl alcohol copolymer. Effect of the Invention

[0011] According to the pest control sheet of the present invention, the repellent or insecticide is sufficiently volatilized, and even if a user touches the pest control sheet with their fingers, the repellent or insecticide impregnated in the agent retention layer does not stick to the user's fingers, and even if a user licks the pest control sheet with their tongue, the repellent or insecticide impregnated in the agent retention layer does not transfer to the tongue. [Brief description of the drawings]

[0012] [Figure 1] 1 is a plan view of a pest control sheet according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view taken along line AA of a pest control sheet according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the embodiment of the pest control sheet of the present invention will be described in detail. Note that when a range is indicated in the description, it includes an upper limit and a lower limit.

[0014] In the embodiment shown in Figures 1 and 2, a barrier layer 2, an adhesive layer 3, and a permeable layer 4 are laminated on a chemical retention layer 1 impregnated with a repellent or insecticide, and the adhesive layer 3 is abutted against the skin or clothing of a user, or a flat surface of a wall or a corner between walls, so that the device can be used indoors or outdoors.

[0015] The repellent in the present invention is a compound itself that is a liquid active ingredient that gradually volatilizes at room temperature of about 15 to 40°C in the usage environment and repels pests such as mosquitoes and horseflies from sucking blood, or a composition that contains the compound as one of its components. In order to develop a repellent effect over time, it is preferable to use a repellent whose boiling point is higher than the above-mentioned room temperature. In addition, a pyrethroid compound described later can also be used as the repellent.

[0016] Such repellents preferably contain essential oils as active ingredients. Specific examples of essential oils include grapefruit, geranium, rosemary, anise, almoise, ylang-ylang, orange, cananga, chamomile, cardamom, cajeput, clary sage, coriander, cypress, sandalwood, cedarwood, citronella, juniper berry, ginger, spearmint, sage, tea tree, nutmeg, neroli, pine needle, basil, patchouli, palmarosa, fennel, black pepper, petitgrain, vetiver, peppermint, bergamot, marjoram, mandarin, lemon eucalyptus, eucalyptus, copaiba, lime, lavender, lemon, lemongrass, rosewood, shell ginger leaf, cinnamon, and peppermint. Essential oils extracted from one of these plants can be used in combination, or essential oils extracted from two or more plants can be used in combination.

[0017] The essential oils obtained from the above plants contain various volatile compounds, which are essential oil components. Grapefruit contains d-limonene, myrcene, α-pinene, etc. Geranium contains citronellol, geraniol, linalool, etc. Rosemary contains α-pinene, camphor, 1,8-cineole, etc. Anise contains (E)-anethole, limonene, anisaldehyde, etc. Almoise contains 1,8-cineole, thujone, borneol, camphor, pinene, artemisinin (sesquiterpene lactone), linalool, nerol, etc. Ylang-ylang contains linalool, β-potassium olefin, germacrene D, etc. Orange contains limonene, myrcene, β-bisabolene, etc. Cananga contains caryophyllene, geranyl acetate, terpineol, etc. Chamomile contains farnesene, chamazulene, α-bisabolol oxide B, etc. Cardamom contains 1,8-cineole, α-terpinyl acetate, limonene, etc. Cajeput contains 1,8-cineole, α-terpineol, para-cymene, etc. Clary sage contains linalyl acetate, linalool, germacrene D, etc. Cloves contain eugenol, β-caryophyllene, eugenyl acetate, etc. Coriander contains d-linalool, camphor, α-pinene, etc. Cypress contains α-pinene, δ-3-carene, etc. Sandalwood contains cis-α-santalol, cis-β-santalol, epi-β-santalol, etc. Cedarwood contains thujopsene, α-cedrene, cedrol, etc. Citronella contains geraniol, limonene, citronellol, camphene, citronellal, geranyl acetate, α-pinene, α-terpineol, etc. Juniper berries contain α-pinene, myrcene, β-farnesene, etc. Ginger contains ar-curcumene, α-zingiberene, β-sesquiphellandrene, etc.Spearmint contains (-)-carvone, dihydrocarvone, 1,8-cineole, etc. Sage contains α-thujone, β-thujone, camphor, etc. Tea tree contains terpinen-4-ol, γ-terpinene, α-terpinene, etc. Nutmeg contains α-pinene, sabinene, β-pinene, etc. Neroli contains linalool, limonene, β-pinene, etc. Pine needles contain α-pinene, β-pinene, myrcene, etc. Basil contains linalool, methyl chavicol, β-caryophyllene, etc. Patchouli contains patchouli alcohol, α-patulene, β-caryophyllene, etc. Palmarosa contains geraniol, geranyl acetate, linalool, etc. Fennel contains (E)-anethole, limonene, methyl chavicol, etc. Black pepper contains β-3-caryophyllene, δ-3-carene, limonene, etc. Petitgrain contains linalyl acetate, linalool, α-terpineol, etc. Vetiver contains vetiverol, vetiven, α-vetibol, etc. Bergamot contains limonene, linalyl acetate, linalool, etc. Marjoram contains terpinen-4-ol, cis-sabinene hydrate, para-cymene, etc. Mandarin contains limonene, γ-terpinene, β-pinene, etc. Lemon eucalyptus contains citronellal, citronellol, citral, etc. Eucalyptus contains 1,8-cineole, α-pinene, limonene, aromadendrene, p-cymene, t-pinocarveol, globulol, etc. Copaiba contains β-potassium olefin, α-humulene, α-copaene, t-α-bergamotene, germacrene D, cadinene, α-bisabolene, γ-mulolene, β-elemene, σ-elemene, etc. Lime contains limonene, γ-terpinene, β-pinene, etc. Lavender contains linalyl acetate, linalool, (Z)-β-ocimene, etc. Lemon contains limonene, β-pinene, γ-terpinene, etc.Lemongrass contains geranial, citral, elemol, etc. Rosewood contains linalool, α-terpineol, cis-linalool oxide, etc. Peppermint contains l-menthol, l-menthone, menthofuran, etc. Cinnamon bark contains cinnamaldehyde, t-2-methoxycinnamaldehyde, coumarin, etc. Shell ginger leaves contain 1,8-cineole, terpinen-4-ol, p-cymene, etc. Mint contains l-menthol, l-menthone, menthofuran, etc.

[0018] The insecticide of the present invention preferably contains a pyrethroid compound as an active ingredient. The pyrethroid compound is an insecticidal component contained in pyrethrum and its derivatives, and includes both natural products extracted from plants and the like by extraction or other methods, and synthetic products synthesized by organic synthesis techniques. The pyrethroid compound acts as an active ingredient, exerting a control effect on the nerves of pests such as mosquitoes and horseflies to exterminate them. In addition, like the repellent, it is preferable to use an insecticide with a boiling point higher than the above-mentioned normal temperature in order to exert an extermination effect over time. The insecticide is either a pyrethroid compound itself, or a composition containing the pyrethroid compound as one of its components.

[0019] Specific examples of pyrethroid compounds include natural pyrethroids such as pyrethrin I <(1R,3R)-2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylic acid (1S)-2-methyl-4-oxo-3-(2Z)-2,4-pentadienyl-2-cyclopenten-1-yl ester>, pyrethrin II <(1R,3R)-3-[(1E)-3-methoxy-2-methyl-3-oxo-1-propenyl]-2,2-dimethylcyclopropanecarboxylic acid (1S)-2-methyl-4-oxo-3-(2Z)-2,4-pentadienyl-2-cyclopenten-1-yl ester>, cinerin I <( 1R,3R)-2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylic acid (1S)-3-(2Z)-(2-butenyl)-2-methyl-4-oxo-2-cyclopenten-1-yl ester>, Cinerin II <(1R,3R)-3-[(1E)-3-methoxy-2-methyl-3-oxo-1-propenyl]-2,2-dimethylcyclopropanecarboxylic acid (1S)-3-(2Z)-(2-butenyl)-2-methyl-4-oxo-2-cyclopenten-1-yl ester>, Jasmolin I <(1R,3R)-2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylic acid (1S)-2-Methyl-4-oxo-3-(2Z)-2-pentenyl-2-cyclopenten-1-yl ester>, Jasmolin II <(1R,3R)-3-[(1E)-3-methoxy-2-methyl-3-oxo-1-propenyl]-2,2-dimethylcyclopropanecarboxylic acid> (1S)-2-methyl-4-oxo-3-(2Z)-2-pentenyl-2-cyclopenten-1-yl ester>, and synthetic pyrethroids, such as allethrin I <2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylic acid 2-methyl-4-oxo-3-(2-propenyl)-2-cyclopenten-1-yl ester>, allethrin II <3-(3-methoxy-2-methyl-3-oxo-1-propenyl)-2,2-dimethylcyclopropanecarboxylic acid 2-methyl-4-oxo-3-(2-propenyl)-2-cyclopenten-1-yl ester>, and phthalthrin (also known asD-Tetramethrin) <(1,3-dioxo-4,5,6,7-tetrahydroisoindolin-2-yl)methyl = 2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropane-1-carboxylate>, Resmethrin <(5-benzyl-3-furyl)methyl = 2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropanecarboxylate>, Fenothrin <3-phenoxa Cybenzyl = 2-dimethyl-3-(methylpropenyl)cyclopropanecarboxylate>, Permethrin <3-phenoxybenzyl = 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate>, Cyphenothrin <cyano(3-phenoxyphenyl)methyl = 2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropanecarboxylate>, Etofenprox <4 -(4-ethoxyphenyl)-4-methyl-1-(3-phenoxyphenyl)-2-oxapentane>, Metofluthrin <2,2-dimethyl-3-(prop-1-en-1-yl)cyclopropanecarboxylic acid = 2,3,5,6-tetrafluoro-4-(methoxymethyl)benzyl>, Profluthrin <(1R,3R)-2,2-dimethyl-3-[(Z)-1-propenyl]cyclopropanecarboxylic acid = 2,3,5,6-tetrafluoro-4-(methoxymethyl)benzyl>, Preferred are tetrafluoro-4-methylbenzyl>, transfluthrin <(1R,3S)-3-[(E)-2,2-dichlorovinyl]-2,2-dimethylcyclopropanecarboxylic acid = 2,3,5,6-tetrafluorobenzyl>, cyfluthrin <cyano(4-fluoro-3-phenoxyphenyl)methyl = 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane-1-carboxylate>, empenthrin, etc. Among the above, permethrin, fenothrin, allethrin, phthalthrin, restmethrin, metofluthrin, transfluthrin, profluthrin, empenthrin are more preferred, and metofluthrin, transfluthrin, profluthrin, empenthrin are most preferred. Also, the above pyrethroid compounds may be used alone or in combination of two or more kinds.;

[0020] Some of the above-mentioned repellents and insecticides may have adverse effects on the human body, such as causing symptoms of poisoning, including vomiting, diarrhea, headaches, and tinnitus, when a user comes into contact with them. Therefore, there is technical significance in providing a permeable layer 4, which will be described later, so that the repellent or insecticide impregnated in the agent retention layer 1 does not stick to the user's fingers when the user touches the pest control sheet with their fingers, and so that the repellent or insecticide impregnated in the agent retention layer 1 does not transfer to the user's tongue when the user licks the pest control sheet with their tongue.

[0021] In addition, the repellent and the insecticide may contain, as a solvent, paraffinic hydrocarbons, alcohols, and polyhydric alcohols having divalent or higher hydroxyl groups, in addition to the essential oils and pyrethroid compounds, which are the active ingredients, respectively. Paraffinic hydrocarbons are saturated hydrocarbons having linear or branched chains with about 10 to 30 carbon atoms, and a mixture of multiple types may be used. Furthermore, since they are compatible with the drug retention layer 1, they spread evenly throughout the drug retention layer 1, and can dissolve the essential oils and pyrethroid compounds well. Polyhydric alcohols have low volatility at room temperature and can remain in the drug retention layer 1 for a long time, and also dissolve the essential oils and pyrethroid compounds, so that the essential oils and pyrethroid compounds can be gradually volatilized, thereby sustaining the control effect.

[0022] Preferred alcohols include ethanol, isopropyl alcohol, etc. Preferred polyhydric alcohols include propylene glycol, dipropylene glycol, 1,3-butylene glycol, sorbitol, glycerin, diglycerin, polyglycerin, polyethylene glycol, etc. The above alcohols and polyhydric alcohols may be used alone or in combination of two or more.

[0023] In addition, either the repellent or the insecticide can be impregnated into the drug retention layer 1 alone and retained therein, or the repellent and the insecticide can be mixed in a predetermined ratio and retained by impregnating them into the drug retention layer 1. According to the technology of the present invention, by impregnating the drug retention layer 1 with an aromatic, a deodorant, an anti-mold agent, or a bactericide instead of the repellent or the insecticide, the drug retention layer 1 can be diverted to other uses.

[0024] The drug retention layer 1 is a substrate impregnated with at least one of a repellent or an insecticide. The drug retention layer 1 has a sheet-like shape with a thickness similar to that of a thin plate or paper. In order to maintain the control effect, the drug retention layer 1 is preferably formed from a material that does not chemically degrade with the repellent or insecticide over time.

[0025] Specifically, the drug retention layer 1 is preferably a porous material having fine voids capable of retaining repellents or insecticides inside, such as nonwoven fabrics, paper, woven fabrics, porous structures made of synthetic resins or inorganic materials, or composites thereof, and the voids are connected to the surface. For example, nonwoven fabrics made of polyethylene or polypropylene, composites of polyethylene and paper in a weight ratio of polyethylene:paper=2-8:2-8, or composites of rayon and paper in a weight ratio of rayon:paper=2-8:2-8, can be used as the drug retention layer 1. In addition, a resin plate member can also be used as long as it is impregnated with at least one of the repellent or insecticide. The drug retention layer 1 is dripped with the repellent or insecticide or immersed in the repellent or insecticide under normal or reduced pressure, and the repellent or insecticide is filled and retained in the fine voids by the penetration force of the drug, and is impregnated. In addition, in order to facilitate absorption of sunlight and promote a rise in temperature of the drug retention layer 1 and facilitate the evaporation of the repellent or insecticide impregnated in the drug retention layer 1, the drug retention layer 1 can be colored black, purple, blue, green, etc. by kneading a coloring pigment into the material of the drug retention layer 1.

[0026] The water contact angle on the surface of the drug retention layer 1 is preferably 60 to 180°, more preferably 80 to 180°, and most preferably 100 to 180°. When the water contact angle on the surface of the drug retention layer 1 is in such a range, even though the drug retention layer 1 has voids communicating from the inside to the surface, moisture such as rain, fog, and sweat is unlikely to spread on the surface of the drug retention layer 1, and does not penetrate into the fine voids of the drug retention layer 1 in a short time, so that the pores through which the repellent or insecticide volatilizes are not sealed, and the repellent or insecticide is not eluted, so that the control effect can be sustained. The water contact angle is preferably measured by the θ / 2 method or the like in accordance with the method described in JIS R3257 (1999) or the like.

[0027] Furthermore, the drug retention layer 1 has a basis weight of 50 to 300 g / m 2 The thickness is preferably 10 to 500 μm, and the basis weight is 60 to 200 g / m 2 and more preferably, the thickness is 20 to 350 μm. When the basis weight and thickness of the drug retention layer 1 are within these ranges, the drug retention layer 1 has pores that are large enough to allow the repellent or insecticide to volatilize from the drug retention layer 1 and diffuse to the outside, but moisture such as rain does not penetrate into the minute voids in the drug retention layer 1, so that the pest control effect can be sustained.

[0028] The barrier layer 2 is provided on one side of the drug retention layer 1 and is a member that does not allow the repellent or insecticide to pass through. The barrier layer 2, like the drug retention layer 1, is also in a sheet-like shape or the like and is made of a material that does not undergo chemical denaturation with the repellent or insecticide over time. By storing or laminating the barrier layer 2 on another object, the repellent or insecticide impregnated in the drug retention layer 1 is prevented from seeping out into the adhesive layer 3 or other objects such as clothing attached to the adhesive layer 3 and causing physical or chemical denaturation. Specifically, the barrier layer 2 is preferably a composite material in which polyolefins such as polyethylene and polypropylene, polyethylene terephthalate, metals such as aluminum, aluminum, silica, or alumina are vapor-deposited on a plastic film. In order to integrate the barrier layer 2 and the drug retention layer 1, a method such as welding by applying high frequency or heat can be used.

[0029] The adhesive layer 3 is provided on the barrier layer 2 on the opposite side to the drug retention layer 1, and is a member capable of adhering to an object to be adhered. By providing the adhesive layer 3, it is possible to prevent damage from pests when the adhesive layer 3 is attached to the skin or clothing of a user while active outdoors, and it can also be peeled off when no longer needed.

[0030] As the adhesive layer 3, various adhesives can be used, such as an acrylic resin-based adhesive obtained by polymerizing an acrylic monomer, or a urethane resin-based adhesive obtained by the reaction of an isocyanate group with a hydroxyl group, and it is preferable that such an adhesive is formed in the form of a layer on one side of the barrier layer 2.

[0031] Although not shown, a release paper layer is preferably provided on the adhesive layer 3 on the opposite side to the drug retention layer 1 and the barrier layer 2. The release paper layer can prevent the adhesive layer 3 from adhering to unintended objects when unused, and can prevent dirt and the like from adhering to the adhesive layer 3. The release paper layer is preferably attached to the adhesive layer 3 in advance, for example, when the product is collected. The release paper layer may be attached individually to each pest control sheet according to the size, or a single release paper layer may be attached to all of a plurality of pest control sheets. Specifically, the release paper layer is preferably made of wood-free paper, glassine paper, or the like, with a silicone resin applied to the surface that contacts the adhesive layer 3.

[0032] The permeable layer 4 is provided on the other side of the drug-retaining layer 1 and is a member that allows the repellent and insecticide to permeate. A plurality of through holes 41 are formed in the permeable layer 4. The area of ​​the through holes 41 is 0.01 to 40 mm. 2 The thickness of the permeable layer 4 is 0.03 to 2 mm. By providing the permeable layer 4, the pest control sheet can sufficiently volatilize the repellent or insecticide, and can prevent the user from touching the drug retention layer 1 containing the repellent or insecticide. As shown in FIG. 1, the permeable layer 4 is formed in a mesh shape, and a plurality of through holes 41 are formed as gaps in the mesh shape. In this embodiment, the shape of the through holes 41 is a rectangle, but in other embodiments, the shape of the through holes 41 may be a polygon such as a triangle, a pentagon, or a hexagon, or a closed curve shape such as a circle, an ellipse, an oval, or a semicircle. In order to integrate the permeable layer 4 and the drug retention layer 1, a method such as melting and fixing them by applying ultrasonic waves, high frequency waves, or a heat source, or bonding the drug retention layer 1 and the permeable layer 4 with an adhesive can be used. Of course, when the drug retention layer 1 is made of a material that does not melt easily with heat, such as paper, thermosetting resin, or inorganic material, it is possible to use a thermoplastic resin as the permeation layer 4 and melt it by applying ultrasonic waves, high frequency waves, or a heat source, as described later, and fix it so as to be entangled with the drug retention layer 1. In addition, when the area of ​​the through hole 41 is 0.03 to 20 mm 2It is more preferable that the thickness of the permeable layer 4 is 0.04 to 1.8 mm. In particular, when the thickness of the permeable layer 4 is in this range, the rigidity of the permeable layer 4 can prevent the present invention from peeling off from clothing or the like when the present invention is attached to clothing or the like.

[0033] In the permeable layer 4, the ratio of the area of ​​the through holes 41 to the thickness of the permeable layer 4 is preferably (area of ​​the through holes 41) / (thickness of the permeable layer 41)=0.3 to 40, and more preferably 0.5 to 38. When the ratio of the area of ​​the through holes 41 to the thickness of the permeable layer 4 is within this range, the repellent or insecticide is sufficiently volatilized, but the repellent or insecticide impregnated in the drug retention layer 1 does not adhere to the user's fingers via the permeable layer 4 even if the user touches the pest control sheet with their fingers, and the repellent or insecticide impregnated in the drug retention layer 1 does not transfer to the tongue via the permeable layer 4 even if the user licks the pest control sheet with their tongue.

[0034] Furthermore, the permeable layer 4 is preferably formed from polyolefins such as polyethylene and polypropylene, fluororesins, polyesters such as polyethylene terephthalate, ethylene-vinyl alcohol copolymers, etc. By forming the permeable layer 4 from these materials, the surface of the permeable layer 4 facing the drug retention layer 1 in particular does not dissolve or swell even when it comes into contact with a repellent or insecticide, and it is possible to prevent the repellent or insecticide impregnated in the drug retention layer 1 from adhering to the user's fingers when the user touches the pest control sheet with his or her fingers, and to prevent the repellent or insecticide from transferring to the user's tongue when the user licks the pest control sheet with his or her tongue.

[0035] Regarding the permeable layer 4, whether the repellent or insecticide can be sufficiently evaporated and whether the repellent or insecticide impregnated in the agent retention layer 1 can be prevented from sticking to the user's fingers when the user touches the pest control sheet with their fingers via the permeable layer 4, and whether the repellent or insecticide will be transferred to the user's tongue via saliva when the user licks the pest control sheet with their tongue, were simulated and evaluated using various materials as shown below.

[0036] As described above, the pest control sheet of the present invention is formed by laminating the drug retention layer 1 impregnated with a drug such as a repellent or an insecticide, the barrier layer 2, the adhesive layer 3, and the permeable layer 4. As shown in FIG. 1, the pest control sheet has a circular shape, but in other embodiments, it may have a polygonal shape such as a triangle, a rectangle, a pentagon, or a hexagon, or a closed curved shape such as an ellipse or an oval. In order to prevent the drug retention layer 1 from being exposed by the permeable layer 4 being separated from the drug retention layer 1 from its edge and detached during use, it is preferable to use a locking member that covers at least the outer peripheral side surface of the drug retention layer 1 and the outer peripheral side surface of the permeable layer 4 provided on the other side, and holds and locks at least the edges of the drug retention layer 1 and the permeable layer 4, and has a cross section when cut along the thickness direction in a shape of approximately C-shaped, approximately J-shaped, approximately U-shaped, or approximately V-shaped. The locking member may be disposed continuously like a frame around at least the entire outer periphery of the side surfaces of the drug retention layer 1 and the permeation layer 4, or a plurality of locking members may be disposed intermittently at a predetermined interval. The locking member may be provided so as to clamp and lock only the edges of the drug retention layer 1 and the permeation layer 4, or may be provided so as to clamp and lock the edges of the drug retention layer 1, the barrier layer 2, and the permeation layer 4, or may be provided so as to clamp and lock the edges of the drug retention layer 1, the barrier layer 2, the adhesive layer 3, and the permeation layer 4. In this way, by locking at least the drug retention layer 1 and the permeation layer 4 with the locking member, it is not necessarily necessary to fix the drug retention layer 1 and the permeation layer 4 by means of fusion, adhesion, or the like. Furthermore, the pest control sheet of the present invention can be stored and used in a container having holes that allow chemicals such as repellents or insecticides to pass through, and having an insertion hole on the side through which the pest control sheet of the present invention can be inserted and removed, or in a container that has a container body and a lid through which the pest control sheet of the present invention can be inserted and removed.

[0037] [Drug volatility test] Various mesh sheets that can be used as the permeable layer 4 were evaluated for their ability to volatilize the drug. Specifically, for various mesh sheets having rectangular through-holes, 50 mg of transfluthrin was impregnated into a drug-retaining layer (pulp) of a predetermined area and thickness, and the layer was allowed to volatilize at 25°C for 24 hours. The transfluthrin was then ultrasonically extracted from the drug-retaining layer with acetone and analyzed by gas chromatography to confirm the volatility. As a result, the sheet in which 5 mg or more of the drug was volatilized was evaluated as ◎, the sheet in which 2 mg or more but less than 5 mg of the drug was volatilized was evaluated as ○, the sheet in which 0.5 mg or more but less than 2 mg of the drug was volatilized was evaluated as △, and the sheet in which less than 0.5 mg of the drug was volatilized was evaluated as ×. Of these, ◎, ○, and △ were evaluated as good because the drug, especially the active ingredient, was volatilized, and × was evaluated as poor because the amount of volatilization was extremely small. The thickness, area, and material of the through-holes 41 of the various mesh sheets are shown in Table 1.

[0038] [Finger non-adhesiveness test] Since it is preferable that the repellent or insecticide does not adhere to the fingers of users such as infants when they touch the pest control sheet with their fingers, various mesh sheets that can be used as the permeable layer 4 were placed on the other side of the surface of the drug retention layer 1, and the finger non-adhesion to black ink, which resembles a drug, was evaluated. Specifically, the drug retention layer 1 coated with a predetermined amount of black ink was placed on an electronic balance, and various mesh sheets having rectangular through holes were placed on the surface of the drug retention layer 1. Then, a 1 cm square urethane, which resembles the user's skin, was placed on the various mesh sheets, and the urethane was pressed with a finger until the value indicated by the electronic balance was 300 g or 500 g. The black ink attached to the urethane was visually confirmed. As a result, the one with no black ink attached to the urethane was evaluated as ◎, the one with almost no black ink attached to the urethane was evaluated as ○, the one with a little black ink attached to the urethane was evaluated as △, and the one with a lot of black ink attached to the urethane was evaluated as ×. Of these, ◎ and ○ were judged as good, since the black ink, which resembles a medicine, was hardly attached, and △ and × were judged as bad, since the black ink was attached. Note that the thickness, area of ​​the through holes 41, and material of each mesh sheet were the same as those used in the medicine volatility test, and are shown in Table 1.

[0039] Since it is preferable that the repellent or insecticide does not transfer when users such as infants lick the pest control sheet, various mesh sheets that can be used as the permeable layer 4 were placed on the other side of the drug retention layer 1, which is the surface side, and the repellent or insecticide was evaluated by licking with the tongue to see if it transfers to the tongue via saliva, that is, to evaluate the non-medication ability when orally administered. 2 Drug retention layer 1 (thickness 350 μm, basis weight 120 g / m 2) was impregnated with 10 mg of transfluthrin, and after 5 minutes, 50 μL of artificial saliva was added from above the permeable layer 4, and a simulated tongue made of urethane was placed on top of it and brought back and forth 10 times in contact with the artificial saliva. After the test, the simulated tongue was extracted with acetone and analyzed by gas chromatography to evaluate the oral non-administrability of the insecticide. When the peak of the insecticide was not detected, it was judged that the insecticide had not been transferred to the tongue and was evaluated as ◯, and when the peak of the insecticide was detected, it was judged that the insecticide had been transferred to the tongue and was evaluated as ×.

[0040] Regarding the various mesh sheets that can be used as the permeable layer 4, the drug volatility test, finger non-adhesiveness test, and oral non-drug administration test were carried out. The results of each example and each comparative example are shown in Table 1.

[0041] [Table 1]

[0042] As shown in Table 1, the mesh sheets of Examples 1 to 7 have the contradictory effects that the black ink representing the drug does not adhere to the artificial tongue even though the drug volatilizes, and the insecticide does not transfer to the artificial tongue. From this, it was found that if the permeable layer, which is a mesh sheet, has a predetermined through-hole area and a predetermined permeable layer thickness, the pest control sheet equipped with the mesh sheet has the effect that the repellent or insecticide is sufficiently volatilized, and the repellent or insecticide impregnated in the drug retention layer 1 does not adhere to the user's fingers even if the user touches the pest control sheet with his / her fingers, and the repellent or insecticide does not transfer to the tongue. [Explanation of symbols]

[0043] 1. Drug retention layer 2. Barrier layer 3. Adhesive layer 4...Transparent layer 41...Through hole

Claims

1. A chemical retention layer impregnated with at least one of a repellent and an insecticide; a barrier layer that is impermeable to the repellent or the insecticide and is provided on one side of the drug retention layer; an adhesive layer provided on the barrier layer on the opposite side of the drug retention layer and capable of adhering to an object to be adhered; a permeable layer provided on the other side of the drug retention layer and permeable to the repellent and the insecticide; The transparent layer has a plurality of through holes formed therein, and the area of ​​the through holes is 0.01 to 40 mm 2 and the thickness of the permeable layer is 0.03 to 2 mm.

2. In the ratio of the area of ​​the through hole to the thickness of the transmission layer, 2. The pest control sheet according to claim 1, wherein (area of ​​the through holes) / (thickness of the permeable layer)=0.3-40.

3. 3. The pest control sheet according to claim 1, wherein the through holes in the permeable layer are formed as mesh-like gaps.

4. 3. The pest control sheet according to claim 1, wherein the permeable layer is made of one material selected from the group consisting of polyolefins, fluororesins, polyethylene terephthalate, and ethylene-vinyl alcohol copolymers.

Images