Packaging material for insect repellents

Abstract

To provide a packaging material for insect repellents that can reduce the adsorption of pyrethroid compounds and fragrances onto the packaging material and their leakage from the packaging material.SOLUTION: A packaging material for insect repellents is intended to package an insect repellent that contains a room-temperature volatile pyrethroid compound and a fragrance. The packaging material for insect repellents has a paper layer and a gas barrier layer. The gas barrier layer has a resin layer. The gas barrier layer has an oxygen permeability of 5 mL / m2 day MPa or less at 20°C, 90% RH.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a packaging material for an insect repellent, which contains a pyrethroid compound volatile at room temperature and a fragrance. [Background technology]

[0002] Insect repellents used to control or exterminate pests are used in various forms. For example, in the case of insect repellents for clothing, there are known ones in which a tablet-shaped insect repellent is packaged in a breathable sheet and placed on or inside folded clothing, and ones in which an insect repellent packaged in a breathable sheet is stored in a resin container with evaporation openings on the front and back, and the container is hung from a hanger hanging rod in a wardrobe by a hanging hook provided on the container.

[0003] Examples of insect repellents that have been used in the past include paradichlorobenzene, camphor, and naphthalene. However, these have a particular odor, so recently, pyrethroid compounds that have little odor and are volatile at room temperature have been widely used instead. In addition, those that contain fragrances for the purpose of adding a scent are also becoming popular.

[0004] However, in formulations that contain highly volatile ingredients such as pyrethroid compounds and fragrances, problems arise in that these ingredients are adsorbed to the packaging material or escape from the packaging material during distribution and storage. When adsorption or escape occurs, the amount of active ingredient or fragrance is substantially reduced, and as a result, there is a risk that the insect repellent effect and aromatic effect may not be fully exerted during the usage period, which poses the issue of having to compound extra active ingredient or fragrance.

[0005] Therefore, for preparations that contain volatile drugs or fragrances, technologies to prevent these ingredients from being adsorbed to or escaping from the packaging material are being investigated. For example, Patent Document 1 discloses that the adsorption of pyrethroid compounds that are volatile at room temperature to resins can be suppressed by an adsorption inhibitor having a specific structure. Patent Document 2 describes a packaging material whose inner surface is made of a propylene homopolymer and which is capable of suppressing adsorption of volatile drugs. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2016-029035 A [Patent Document 2] JP 2001-278371 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, Patent Documents 1 and 2 do not evaluate the adsorption or loss of the room-temperature volatile pyrethroid compound or the fragrance, and there is still room for further study regarding packaging materials for insect repellents that contain room-temperature volatile pyrethroid compounds and fragrances. SUMMARY OF THE PRESENT EMBODIMENTS The present invention has an object to provide a packaging material for an insect repellent that can suppress the adsorption and loss of pyrethroid compounds and fragrances that are volatile at room temperature. [Means for solving the problem]

[0008] As a result of extensive research, the inventors have found that the use of a packaging material having a specific oxygen permeability and including a gas barrier layer having a resin layer and a paper layer can provide a significant inhibitory effect against the adsorption and loss of pyrethroid compounds and fragrances contained in an insect repellent contained therein, and have completed the present invention.

[0009] That is, the present invention is achieved by the following [1] and [2]. [1] A packaging material for an insect repellent, which contains a room temperature volatile pyrethroid compound and a fragrance, The insect repellent packaging material has a paper layer and a gas barrier layer, The gas barrier layer has a resin layer, The gas barrier layer has an oxygen permeability of 5 mL / m at 20° C. and 90% RH. 2 Packaging material for insect repellents with a strength of less than 1000MPa. [2] The packaging material for an insect repellent according to [1], wherein the gas barrier layer is made of aluminum-deposited polyethylene terephthalate. Effect of the Invention

[0010] It is possible to provide a packaging material for an insect repellent that can suppress the adsorption of pyrethroid compounds and fragrances to the packaging material and the escape of the pyrethroid compounds and fragrances to the outside of the packaging material. [Brief description of the drawings]

[0011] [Figure 1] 1 is a cross-sectional view of an insect repellent packaging material according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The packaging material for an insect repellent of the present invention will be described in detail below.

[0013] [Insect repellent packaging material] The packaging material for an insect repellent of the present invention is a packaging material for an insect repellent containing a room temperature volatile pyrethroid compound and a fragrance, The insect repellent packaging material has a paper layer and a gas barrier layer, the gas barrier layer includes a resin layer, The gas barrier layer has an oxygen permeability of 5 mL / m at 20° C. and 90% RH. 2 ·day·MPa or less.

[0014] 1 shows a cross-sectional view of an insect repellent packaging material 10 according to one embodiment of the present invention. The insect repellent packaging material of the present invention has a paper layer 1 and a gas barrier layer 2. Each layer will be described below.

[0015] <Paper layer> The insect repellent packaging material 10 of the present invention has a paper layer 1 . Examples of the fiber material of the paper used for the paper layer include natural plant fibers, natural animal fibers, and chemical fibers. From the viewpoint of environmental impact, however, those containing natural fibers are preferred, and those containing 50% by mass or more of natural fibers are more preferred. Examples of the paper include kraft paper, glassine paper, and cardboard, with kraft paper being preferred.

[0016] The paper used in the present invention may also contain appropriate additives such as sizing agents, fixing agents, various fillers for papermaking, retention aids, dry strength agents, wet strength agents, binders, dispersants, flocculants, plasticizers, and adhesives.

[0017] The paper used for the paper layer has a basis weight of 20 to 100 g / m 2 is preferable, and 30 to 90 g / m 2 More preferably, 40 to 80 g / m 2 is more preferred.

[0018] The packaging material for an insect repellent of the present invention has a reduced gloss, can express the texture of paper, and has a natural texture compared to conventional packaging materials made of plastic films. Therefore, from the viewpoint of being easy to place without disrupting the atmosphere of the room even during use, it is preferable that the outermost layer is a paper layer.

[0019] The content of the paper layer relative to the total amount of the packaging material for an insect repellent of the present invention is preferably 50% by mass or more. By making the content of the paper layer 50% by mass or more, the amount of resin used in the packaging material can be reduced, and the environmental burden can be reduced. The content of the paper layer is more preferably 52% by mass or more. In addition, the upper limit of the content of the paper layer is not particularly limited, but can be, for example, 70% by mass or less, and preferably 60% by mass or less. In addition, according to the Law for the Promotion of Effective Utilization of Resources, if the paper layer content of the total amount of packaging material is 50% or more by mass, it can be given a paper mark and can be recycled as paper, which reduces the environmental impact.

[0020] <Gas barrier layer> The insect repellent packaging material 10 of the present invention has a resin layer and has an oxygen permeability of 5 mL / m at 20° C. and 90% RH. 2 The gas barrier layer 2 has a resistance of 0.1 MPa or less.

[0021] The oxygen permeability of the gas barrier layer at 20℃ and 90% RH is 5mL / m 2 ·day·MPa or less, and 4mL / m 2 ·day·MPa or less is more preferable, and 3mL / m 2 The lower limit of the oxygen permeability is not particularly limited, but is, for example, 0.01 mL / m 2 ·day·MPa or more.

[0022] The oxygen permeability can be measured, for example, using an oxygen permeability measuring device (manufactured by Mocon, product name "OXTRAN") in accordance with JIS K7126-2 at a temperature of 20°C and a relative humidity of 90%.

[0023] The gas barrier layer may have a single-layer structure or a multi-layer structure as long as it has a resin layer. Examples of gas barrier layers that satisfy the above oxygen permeability include a silica-deposited PET layer, an aluminum-deposited polyethylene terephthalate (PET) layer, an alumina-deposited PET layer, and a silica-alumina-deposited PET layer.

[0024] In the insecticide packaging material 10 of the present invention, the gas barrier layer 2 is preferably made of aluminum-deposited polyethylene terephthalate. That is, the gas barrier layer 2 preferably comprises an aluminum-deposited layer 2a and a polyethylene terephthalate layer 2b. It is preferable that the paper layer 1 is laminated on the aluminum vapor-deposited layer 2a side of the aluminum vapor-deposited polyethylene terephthalate as shown in Fig. 1. With the above-mentioned configuration, the surface that adheres to the paper layer becomes the aluminum vapor-deposited layer, which is a configuration order with good workability.

[0025] The thickness of the gas barrier layer can be, for example, 5 to 40 μm, preferably 8 to 30 μm, and more preferably 10 to 20 μm. When the gas barrier layer has a multi-layer structure, the total thickness of each layer should be within the above range. When the gas barrier layer is made of aluminum-deposited polyethylene terephthalate, the thickness of the aluminum-deposited layer can be, for example, 5 to 40 nm, preferably 8 to 30 nm, and more preferably 10 to 20 nm.

[0026] <Heat seal layer> As shown in Fig. 1, the insect repellent packaging material 10 of the present invention preferably further comprises, as the innermost layer, a heat seal layer 3. The heat seal layer must have sufficient adhesiveness to be bonded by heat, pressure, etc.

[0027] The heat seal layer may be a single layer or a multilayer structure, as long as it is made of a material that satisfies these requirements. For example, the heat seal layer may be made of polyethylene (PE) such as low density polyethylene (LDPE), high density polyethylene (HDPE), linear low density polyethylene (LLDPE), etc., polypropylene (PP) such as biaxially oriented polypropylene (OPP) and non-oriented polypropylene (CPP), ethylene-vinyl acetate copolymer (EVA), ionomer (IO), ethylene-methacrylic acid copolymer (EMAA), ethylene-acrylic acid copolymer (EAA), polyacrylonitrile (PAN), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), etc. Among them, polypropylene (PP), polyethylene (PE), and ethylene-vinyl acetate copolymer (EVA) are preferred, and polyethylene (PE) is more preferred.

[0028] The thickness of the heat seal layer may be, for example, 10 to 100 μm, and preferably 20 to 80 μm.

[0029] As shown in Fig. 1, the insecticide packaging material 10 of the present invention can be a laminate of a paper layer 1, a gas barrier layer 2, and a heat seal layer 3. Each layer may be bonded with an adhesive or the like as necessary.

[0030] <Insect repellent> The packaging material for an insect repellent of the present invention is a packaging material for packaging an insect repellent containing a pyrethroid compound volatile at room temperature and a fragrance. The insect repellent to be contained therein will be described below.

[0031] The insect repellent comprises an impregnated body impregnated with a pest control composition containing a room temperature volatile pyrethroid compound and a fragrance. The pyrethroid compound contained in the pest control composition is not particularly limited as long as it is a pyrethroid compound that volatilizes at room temperature, and examples thereof include empenthrin, transfluthrin, metofluthrin, profluthrin, tetramethrin, etc., which can be used alone or in combination of two or more types. Among these, profluthrin and empentrin are preferably used.

[0032] The fragrance contained in the pest control composition is not particularly limited as long as it is a fragrance that volatilizes at room temperature, and examples thereof include natural fragrances such as citronella oil, eucalyptus oil, lemon oil, lemongrass oil, peppermint oil, orange oil, and turpentine oil, synthetic fragrances and blended fragrances such as pinene, limonene, linalool, geraniol, citronellal, borneol, benzyl alcohol, benzyl benzoate, anethole, eugenol, citral, citronellal, citronellol, menthone, menthol, and cineol, and these can be used alone or in combination of two or more.

[0033] In addition to the pyrethroid compounds and fragrances, the pest control composition may contain various additives known in the art as necessary. For example, stabilizers such as BHT and BHA, dyes such as blue, yellow, and red, photocatalysts, deodorants such as activated carbon and charcoal, extracts of bamboo, persimmon, grapefruit, etc., disinfectants such as silver and copper compounds, organic solvents such as paraffin and naphthene, and end point determination functions may be used in combination.

[0034] Examples of the impregnated body include sheets, mats, granules, granules, or powders of natural fibers of animal, vegetable, or mineral origin, synthetic fibers, semi-synthetic fibers, regenerated fibers, etc.; polymeric compounds; inorganic powders such as silicic acid, kaolin, activated carbon, bentonite, diatomaceous earth, talc, and calcium carbonate; vegetable powders such as wood flour, soybean flour, wheat flour, and starch; and inclusion compounds such as cyclodextrin.

[0035] The above-mentioned pest control composition can be obtained by mixing the above-mentioned various components in a conventional manner, and these components may be further dissolved in a suitable solvent.

[0036] The solvent is not particularly limited, and for example, water, hexane, paraffin, ethanol, propanol, decanol, glycerin, hydrocarbon, diethyl ether, isopropyl myristate, acetone, acetic acid, oleic acid, acetate, ethylene glycol, ethylene glycol monobutyl ether, propylene glycol monobutyl ether, propylene glycol-tert-butyl ether, dipropylene glycol monobutyl ether, propylene glycol, dipropylene glycol, 2-phenoxyethanol, 3-methyl-3-methoxy-1-butanol, diethylene glycol mono 2-ethylhexyl ether, diethyl phthalate, triethyl citrate, linoleic oil, etc. can be used alone or in combination of two or more. If necessary, a surfactant can also be used, and an anionic surfactant, a cationic surfactant, an amphoteric surfactant, a nonionic surfactant, etc. can be used alone or in combination of two or more.

[0037] The impregnated material prepared as described above can be placed in a breathable container, such as a paper container or a nonwoven bag having an opening, to be used as an insect repellent. EXAMPLES

[0038] The present invention will be further described below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0039] [Insect repellent packaging material] Example 1 Aluminum-deposited polyethylene terephthalate (VMPET12) with a thickness of 12 μm, oxygen permeability: approx. 1 [ml / m 2 50g / m2 (100g / m2 x 100 / day x 100 / MPa) 2 A paper layer of VMPET12 is laminated, and a 30 μm thick linear low density polyethylene (LLDPE30, oxygen permeability: 3000 or more [ml / m 2 The resulting packaging material in which the above-mentioned three layers were laminated was used as the insect repellent packaging material of Example 1. In the above-mentioned packaging material, the paper layer was the outermost layer.

[0040] Comparative Example 1 A 12 μm thick aluminum-deposited polyethylene terephthalate (VMPET12) is laminated on the aluminum-deposited layer side with a 15 μm thick polyethylene (PE15) and a 12 μm thick polyethylene terephthalate (PET12, oxygen permeability: approx. 100 [ml / m 2 100μm thick linear low density polyethylene (LLDPE50, oxygen permeability: 3000 or more [ml / m 2 The packaging material in which the PET12 and the PET12 were laminated was used as the packaging material for the insect repellent of Comparative Example 1. In the above packaging material, the PET12 was the outermost layer.

[0041] Comparative Example 2 Aluminum-deposited non-oriented polypropylene (VMCPP25) with a thickness of 25 μm, oxygen permeability: approx. 10 [ml / m 230g / m2 (100g / m2 x 100 / day x 100 / MPa) 2 The packaging material in which these paper layers were laminated was used as the packaging material for an insect repellent of Comparative Example 2. In the packaging material, the paper layer was the outermost layer.

[0042] [Adsorption and desorption of pyrethroid compounds volatile at room temperature] A paper sheet measuring 8.5 cm x 6.5 cm was impregnated with 140 mg of the drug solution having the composition shown in Table 1 below. The amount of profluthrin impregnated per paper sheet was 50 mg. Next, three paper sheets impregnated with the above-mentioned drug solution were enclosed in 15 cm x 20 cm packaging materials of the Example and Comparative Example, respectively, and left to stand at 50°C for one month. After leaving the sheets to stand, the profluthrin remaining in each sheet was extracted, and the amount of profluthrin remaining was confirmed using a gas chromatograph (Shimadzu Corporation, GC-2014), and the remaining rate was calculated according to the following formula (n=3). Residual rate (%) = {Remaining amount after standing (mg) / Impregnated amount (50mg)} x 100 The obtained average value of the remaining rate was used for evaluation according to the following evaluation criteria.

[0043] <Evaluation criteria> ◎: Profluthrin residual rate (n=3 average) is 95% or more ○: Profluthrin residual rate (n=3 average) is 90% or more but less than 95% ×: Profluthrin residual rate (n=3 average) is less than 90%

[0044] [Table 1]

[0045] [Aroma release] A paper sheet measuring 8.5 cm x 6.5 cm was impregnated with 140 mg of the drug solution having the composition shown in Table 1 above. Next, two paper sheets impregnated with the above-mentioned chemical solution were enclosed in 15 cm x 20 cm packaging materials of the examples and comparative examples, respectively, and treated for 30 minutes at an output of 60 W using a weather resistance tester (Xenon Weather Meter X25 model, manufactured by Suga Test Instruments Co., Ltd.). After the treatment, the packaging materials were picked up and evaluated by three odor judges to see if there was any odor leakage from the packaging materials. Specifically, the packaging materials were scored from 1 to 4 according to the following criteria.

[0046] 4: No feeling at all 3: Barely felt 2: I feel it a little 1: Feel The odor was finally evaluated according to the following criteria using the average score obtained by the three odor judges. ◯ and ⊚ are at a level that is acceptable for practical use.

[0047] <Evaluation criteria> ◎: Average score is 3.5 or higher 〇: Average score is 3.0 or more but less than 3.5 △: Average score is 2.0 or more and less than 3.0 ×: Average score is less than 2.0

[0048] The evaluation results are shown in Table 2 below. The configuration of the packaging material for each example is also shown. The content of the paper layer indicates the content of the paper layer relative to the total amount of the packaging material.

[0049] [Table 2]

[0050] In the packaging structure shown in Table 2, the left side represents the outermost layer and the right side represents the innermost layer (contents side). The numbers after the abbreviations such as VMPET, LLDPE, PET, PE, VMCPP indicate the film thickness (in μm). The number g after the paper is the basis weight (unit: g / m 2 ) is shown. For aluminum-vapor-deposited resin (VMPET12, VMCPP25), the aluminum-vapor-deposited layer is the outermost layer and the resin layer is the innermost layer (contents side).

[0051] It was found that when the packaging material of Example 1 having a paper layer and a gas barrier layer was used, the residual rate of propyltriline was high and the loss of aroma could be suppressed. On the other hand, in the packaging material of Comparative Example 1, which did not have a paper layer, the residual rate of profluthrin was low, and fragrance loss was observed compared to Example 1. In addition, in the packaging material of Comparative Example 2, which did not have a gas barrier layer, the residual rate of profluthrin was equivalent to that of Example 1, but obvious fragrance loss was observed.

[0052] In addition, in a practical use system, if the pyrethroid compound adsorption / loss evaluation and the aroma release evaluation are both ⊚, there is no need to consider the reduction in the above components before opening the packaging, and the usage period can be set based on the amount of the above components contained in the contents. If even one of them is ✕, the above components and the aroma intensity will have decreased before the packaging is opened, and a short usage period must be set relative to the amount of the above components contained in the contents. [Explanation of symbols]

[0053] 1 paper layer 2 Gas barrier layer 2a Aluminum deposition layer 2b Resin layer (polyethylene terephthalate layer) 3 Heat seal layer 10. Packaging materials for insect repellents

Claims

1. A packaging material for an insect repellent, which packages an insect repellent containing a room temperature volatile pyrethroid compound and a fragrance, The insect repellent packaging material has a paper layer and a gas barrier layer, The gas barrier layer has a resin layer, The gas barrier layer has an oxygen permeability of 5 mL / m at 20° C. and 90% RH. ２ Packaging material for insect repellents, with a modulus of less than 1 / day MPa.

2. 2. The insect repellent packaging material according to claim 1, wherein the gas barrier layer is made of aluminum-deposited polyethylene terephthalate.

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