WO2014065150A1 - 薬剤揮散体 - Google Patents
薬剤揮散体 Download PDFInfo
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- WO2014065150A1 WO2014065150A1 PCT/JP2013/077915 JP2013077915W WO2014065150A1 WO 2014065150 A1 WO2014065150 A1 WO 2014065150A1 JP 2013077915 W JP2013077915 W JP 2013077915W WO 2014065150 A1 WO2014065150 A1 WO 2014065150A1
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- WIPO (PCT)
- Prior art keywords
- insect repellent
- resin
- repellent component
- mesh
- room temperature
- Prior art date
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/18—Vapour or smoke emitting compositions with delayed or sustained release
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M1/00—Stationary means for catching or killing insects
- A01M1/20—Poisoning, narcotising, or burning insects
- A01M1/2022—Poisoning or narcotising insects by vaporising an insecticide
- A01M1/2027—Poisoning or narcotising insects by vaporising an insecticide without heating
- A01M1/2055—Holders or dispensers for solid, gelified or impregnated insecticide, e.g. volatile blocks or impregnated pads
Definitions
- the present invention relates to a chemical volatilizer for controlling and repelling flying insect pests such as mosquitoes and flyfish, and more particularly, a chemical volatilization composed of a fibrous material and comprising a mesh containing a room temperature volatile pyrethroid insect repellent component. It is about the body.
- Patent Document 1 discloses a chemical volatilization body using a plurality of net-like materials made of twisted yarns impregnated with an insect repellent component.
- Patent Document 2 discloses a molded article for controlling pests in which a plurality of grooves are formed on the surface of the resin molded article at intervals of 300 ⁇ m or less to prevent sticking of the pest controlling active ingredient.
- these insect repellents are often used suspended from windows or entrances. In this case, the insect repellents may be disturbed or unsightly.
- a method of reducing the presence of the insect repellent by reducing the overall size of the insect repellent or reducing the thickness can be considered.
- the chemical volatilizer described in Patent Document 1 basically comprises a flat mesh made of a resin that is non-adsorptive to insect repellent components such as polyethylene terephthalate (PET). Although the yarn is impregnated, it is only attached or impregnated near the surface of the yarn. Therefore, when the twisted yarn is cut into a cross section, depending on the shape of the cross section, the insect repellent component may be located at the center of the cross section and have a distance to the outer periphery, but the volatilization rate of the insect repellent component is extremely high. fast.
- PET polyethylene terephthalate
- the pest control molded article described in Patent Document 2 is carried in a state where the pest control active ingredient is kneaded in the resin carrier, the pest control active ingredient is compared with the chemical volatilization product described in Patent Document 1. It has the feature that it can be stabilized by suppressing the volatilization rate of the. However, when the volatilization rate is raining, volatilization of the pest control active ingredient may be inhibited by water, and the control effect may be reduced.
- an object of the present invention is to provide a chemical volatilization body that retains the volatilization performance even when rain is applied to the chemical volatilization body.
- the present invention has been found that the following constitution has an excellent effect for achieving the above-mentioned object.
- the fibrous material is composed of a resin filament, and the structure with respect to the weight of the structure
- a chemical volatilization body characterized by having a water retention ratio, which is an amount that the body can retain water, of 0.005 or more and 0.5 or less.
- the drug volatilizer according to (1) wherein the mesh size of the mesh portion of the structure is 10 mm 2 or more and 200 mm 2 or less.
- the drug volatilizer according to (1) or (2), wherein the resin filament is formed by kneading the room temperature volatile pyrethroid insect repellent component into a resin carrier, and then molding the resin filament.
- the chemical volatilization body of the present invention is an amount that the structure can retain water relative to the weight of the structure, that is, the water retention ratio is within a predetermined range, when installed outdoors, a room temperature volatile pyrethroid insect repellent due to rain adhesion Control of volatilization of components can be improved.
- FIG. 1 It is a perspective view which shows the example of a planar net.
- A is a perspective view showing an example of a three-dimensional structure
- (b) is a front view of (a)
- (c) is a cc cross-sectional view of (b).
- the chemical volatilization body of the present invention is a chemical volatilization body composed of a structure having a planar or three-dimensional mesh composed of a fibrous material containing a room temperature volatile pyrethroid insect repellent component.
- Root-temperature volatile pyrethroid insect repellent As said normal temperature volatile pyrethroid type insect repellent component, it has the property to volatilize in the air at normal temperature, and the vapor pressure in 25 degreeC is about 0.001 Pa or more and 0.1 Pa or less. Specific examples include at least one of metofluthrin, profluthrin, transfluthrin, and empentrin from the viewpoints of volatilization performance and safety. These insect repellent components have various optical isomers or geometric isomers, and any isomer can be used alone or in a mixture.
- the said fibrous material says what was comprised by the fiber form, and the thing etc. which twisted the long fiber (filament) itself, the long fiber or the short fiber, and were made into the fiber form etc. are mention
- the water retention ratio tends to increase by using twisted fibrous materials, but if the value is within a predetermined range, the effect of the present invention can be obtained.
- the resin filament contains the room temperature volatile pyrethroid insect repellent component.
- the resin carrier described below is kneaded with this room temperature volatile pyrethroid insect repellent component to prepare a resin composition described later, and then molded to obtain a resin filament, First, a resin composition described later is molded to obtain a resin filament, and then the resin filament is twisted to form a mesh and impregnated with the room temperature volatile pyrethroid insect repellent component.
- a resin filament is obtained by extrusion molding or injection molding of the resin composition described later, and then a mesh is formed, or the resin composition is directly formed by injection molding or the like. And a method of forming a mesh having
- the resin composition is obtained by kneading a resin carrier with a fine powder carrier and another resin carrier as necessary. In addition, it is preferable on efficiency that this resin composition is once molded into pellets and then subjected to the above molding.
- the resin carrier is somewhat different depending on whether a room temperature volatile pyrethroid insect repellent component is kneaded or impregnated. That is, in the case of the former, it is not particularly limited as long as the insect repellent component mixed in the inside of the carrier can gradually bleed and volatilize on the surface.
- a polyolefin such as a polyethylene resin or a polypropylene resin
- resins formed by polymerizing monomers such as carboxylic acid esters.
- the monomer such as carboxylic acid ester is effective for controlling volatilization of the insect repellent component from the surface of the resin carrier.
- methyl acrylate, ethyl acrylate, methyl methacrylate, methacrylic acid examples include ethyl and vinyl acetate.
- the insect repellent component to be used may be appropriately adjusted in the range of 1 to 30% by mass relative to the polyolefin resin.
- the resin carrier may be a polymer blend in which a polyolefin copolymer containing a large amount of a carboxylic acid ester monomer and a homopolymer of an olefin are mixed in an adjusted ratio. Furthermore, other polymer compounds such as a styrene-based thermoplastic elastomer can be contained as necessary.
- an ethylene-vinyl acetate copolymer is preferable from the viewpoint of performance and usability, and the number ratio of ethylene units to vinyl acetate units in the copolymer is 90:10 to 70:30. preferable. This is because if the amount of vinyl acetate units is too small, the physical properties hardly change from those of polyethylene, and the bleed adjusting effect required in the present invention can hardly be expected. On the other hand, when there are too many vinyl acetate units, it becomes difficult to mold into resin pellets.
- the melt mass flow rate (MFR) of the ethylene-vinyl acetate copolymer is preferably 5 g / 10 min or more and 50 g / 10 min or less. If the MFR is too small, the effect as a bleed adjusting agent cannot be expected, and if the MFR is too large, the influence on the physical properties of the resin pellets cannot be ignored.
- a resin non-adsorptive to an insect repellent component such as polyethylene terephthalate (PET) or polybutylene terephthalate (PBT) is usually used.
- PET polyethylene terephthalate
- PBT polybutylene terephthalate
- An insect repellent component is carried on the surface of a resin carrier comprising a flat or three-dimensional mesh and is used for volatilization.
- the resin such as polyolefin resin, styrene thermoplastic elastomer, or rayon described above is blended into such resin.
- the resin carrier can be modified to adjust the volatility of the insect repellent component.
- the fine powder carrier used in the present invention is a component that can be added to carry a room temperature volatile pyrethroid insect repellent component in a resin pellet.
- examples thereof include microcrystalline silica called so-called white carbon, fine powdered silicic acid, diatomaceous earth, zeolites, viscous minerals, wood powder, and the like.
- the size of the fine powder carrier is preferably a number average particle size of 1 ⁇ m or more and 30 ⁇ m or less, and more preferably 5 ⁇ m or more and 20 ⁇ m or less.
- the number average particle diameter exceeds 30 ⁇ m, the surface area is insufficient even if the content is in the above-mentioned range, so that it is difficult to carry an insect repellent component as a carrier, and the resulting resin pellets are easily sticky.
- fine particles of less than 1 ⁇ m are not practical because they are difficult in practice and the physical properties greatly change.
- the fine powder carrier containing microcrystalline silica such as white carbon does not react with the insect repellent component, and fine powder having a large surface area can be used.
- These fine powder carriers carry an insect repellent component to suppress stickiness, and as a result, the resin composition obtained by kneading together with the resin component is less sticky as a whole and can be suitably used as a master batch.
- polyolefin resin examples include polyethylene (PE) and polypropylene (PP).
- PE polyethylene
- PP polypropylene
- Polyethylene is preferred because of its affinity with ethylene-vinyl acetate copolymer and ethylene-methyl methacrylate copolymer.
- low density polyethylene specifically, branched low density polyethylene (LDPE) and chain low density polyethylene (LLDPE) are preferable.
- the compounding amount of the resin carrier is preferably 10% by mass or more, and more preferably 20% by mass or more with respect to the entire resin composition. If it is less than 10 mass%, the effect of suppressing excessive bleed will be insufficient. On the other hand, the upper limit is preferably 90% by mass or less, and more preferably 60% by mass or less. If the amount is too large, the resin composition pellets are used as a master batch, and the resin molded product obtained by kneading with the other resin carrier too suppresses bleeding and is the original purpose of the room temperature volatile pyrethroid. This is because the insect repellent effect due to the volatilization of the system insect repellent component may be excessively reduced.
- bleed of the resin pellets obtained in an appropriate range can be achieved by kneading with 10% by mass or more and 90% by mass or less of ethylene-vinyl acetate copolymer and / or ethylene-methyl methacrylate copolymer. It becomes possible to adjust.
- the content of the fine powder carrier is preferably 30% by mass or less, and more preferably 25% by mass or less, with respect to the entire resin composition. When it exceeds 30 mass%, it becomes difficult to maintain the shape as a pellet when the resin composition is pelletized due to the blending ratio with the resin carrier. Moreover, since it will also be contained in the molded article using the said resin composition, when too much, the possibility of affecting the physical property of a chemical volatilization body cannot be avoided. Further, the lower limit value of the content of the fine powder carrier with respect to the entire resin composition is not particularly limited, but is set to 10% by mass or more in the case where it is necessary to suppress excessive bleeding. It is preferable to do this. If the amount is less than the lower limit, the suppressing effect may be insufficient.
- the resin composition is obtained by heating the resin carrier and kneading the room temperature volatile pyrethroid insect repellent component and, if necessary, a fine powder carrier or other heated resin carrier. And a pellet can be obtained by pelletizing this and cooling.
- the heating temperature depends on the type of resin used for the resin carrier and the type of resin used for other resin carriers, but is usually about 100 to 140 ° C.
- an ethylene-vinyl acetate copolymer described later manufactured by Tosoh Corporation: Ultrasen 710 has a melting point of 70 ° C. and can be sufficiently kneaded. If the heating temperature exceeds 140 ° C. and the heating temperature is too high, the room temperature volatile pyrethroid insect repellent component may be thermally decomposed or transpiration loss, which is not preferable.
- the resin composition 10 mass% or more and 60 mass% or less of room temperature volatile pyrethroid insect repellent component, 30 mass% or less of fine powder carrier, 10 mass% or more and 60 mass% or less.
- examples thereof include combinations containing the following resin carriers such as ethylene-vinyl acetate copolymer.
- the other resin carrier may be included in the production stage of the resin composition pellets, and the resin composition pellets are molded without the other resin carriers. Then, the drug volatilization body may be obtained by diluting the pellet with the other resin carrier, kneading and molding.
- the dilution ratio is preferably 1.5 times or more and the upper limit is preferably about 5 times. If the ratio is less than 1.5 times, there is no merit in the process of dilution. On the other hand, if the ratio exceeds 5 times, the content of the insect repellent component is naturally reduced.
- the pellet made of the resin composition is molded into a chemical volatilization body. Further, as described above, when the other resin carrier is not contained in the insect repellent component-containing resin pellets, the insect repellent component-containing resin pellets are diluted with the other resin carriers, kneaded and molded. It is good also as a chemical volatilization body.
- This chemical volatilization body is a structure having a shape that is preferably formed into a three-dimensional mesh by combining resin filaments.
- this molding method first, the pellets are molded by extrusion molding, injection molding or the like to obtain resin filaments, and then a mesh is formed, or the insect repellent component-containing resin pellets are directly or directly molded by injection molding or the like. And a method of forming a mesh by crossing the resin filaments.
- Examples of the mesh structure include a planar net 1 as shown in FIG. 1 and a three-dimensional structure 2 as shown in FIGS. 2 (a) to 2 (c).
- a shape of the chemical volatilization body which has the said mesh structure it is not limited to these examples.
- the planar net shown in FIG. 1 is obtained by intersecting the filaments in a lattice shape to form a planar lattice structure.
- the three-dimensional structure 2 shown in FIGS. 2 (a) to 2 (c) has a rectangular wave-like body 21 filament shown in FIG. It is intended to cross.
- at least two top parts contained in one top part containing surface are reinforced with the reinforcing material 22 which consists of a linear rod-shaped body.
- the top portion-containing surface is a surface constituting the three-dimensional structure and a surface on which the top portion is disposed.
- Such a three-dimensional structure 2 can increase the surface area of the filament existing in a certain volume as compared with the planar net 1. Furthermore, when the reinforcing material 22 is used, the surface area of the filament can be increased, and the strength of the three-dimensional structure can be improved.
- a peripheral part is suitably determined by relationship with the intensity
- the water retention ratio of the structure that is, the amount that the structure can retain water with respect to the weight of the structure (amount that the structure can retain water (parts by weight) / weight of the structure (parts by weight)) is 0. 005 or more is good and 0.01 or more is preferable. If it is smaller than 0.005, there may be a problem in manufacturing such as mesh molding.
- the upper limit of the water retention ratio is preferably 0.5, and preferably 0.4. When it is larger than 0.5, rainwater may remarkably suppress the volatilization of the room temperature volatile insect repellent component, resulting in a problem that the expected insect repellent effect cannot be obtained.
- the amount that the structure can hold water means the amount of water that physically adheres to the dents and gaps of the structure.
- the size of the mesh is the size of the mesh portion of the structure, that is, the mesh portion of the structure, and the surface area (one minimum mesh) formed by one mesh (minimum mesh) surrounded by the resin filaments ( area enclosed by the center line of the peripheral resin filaments) is, 10 mm 2 or more is good, 20 mm 2 or more. If it is narrower than 10 mm 2, there is a high possibility that the attached water will block the mesh due to tension, and as a result of blocking the flow of air through the mesh, there may be a problem that volatilization of the insect repellent component is suppressed.
- the upper limit of the surface area, 200 mm 2 selfishness, 150 mm 2 is preferred. When the width is larger than 200 mm 2 , the mesh strength is weak and easily deformed, which makes it difficult to handle and may cause a problem that the surface area of the structure containing the insect repellent component is insufficient.
- the chemical volatilization body of the present invention in addition to the room temperature volatility pyrethroid insect repellent component, in addition to the room temperature volatility pyrethroid insect repellent component, the chemical volatilization body of the present invention, in particular, for the purpose of imparting a fragrance and reinforcing the insect repellent effect at the initial stage of use.
- a flying insect repellent fragrance composition can be contained.
- the above-mentioned flying pest repellent fragrance composition is a composition containing a flying pest repellent fragrance, and preferably a repellent effect sustained ingredient.
- the flying pest repellent fragrance is one or more fragrance components selected from acetate ester compounds represented by the following general formula (I) and / or allyl ester compounds represented by the general formula (II): Examples thereof include a component containing (a) and one or more perfume components (b) selected from monoterpene alcohols or aromatic alcohols having 10 carbon atoms.
- R 1 represents an alcohol residue having 6 to 12 carbon atoms.
- R 2 —CH 2 —COO—CH 2 —CH ⁇ CH 2 (II) (Wherein R 2 represents an alkyl group having 4 to 7 carbon atoms, an alkoxy group, a cycloalkyl group, a cycloalkoxy group, or a phenoxy group.)
- acetate compound represented by the general formula (I) examples include p-tert-butylcyclohexyl acetate, o-tert-butylcyclohexyl acetate, p-tert-pentylcyclohexyl acetate, tricyclodecenyl acetate, Benzyl acetate, phenylethyl acetate, styryl acetate, anisyl acetate, cinnamyl acetate, terpinyl acetate, dihydroterpinyl acetate, linalyl acetate, ethyl linalyl acetate, citronellyl acetate, geranyl acetate, neryl acetate, bornyl acetate And isobornyl acetate.
- allyl ester compound represented by the general formula (II) examples include allyl hexanoate, allyl heptanoate, allyl octanoate, allyl isobutyloxy acetate, allyl n-amyloxy acetate, allyl cyclohexyl acetate. And allyl cyclohexyl propionate, allyl cyclohexyl oxyacetate, allyl phenoxy acetate and the like.
- component (b) examples include terpineol, geraniol, dihydromyrcenol, borneol, menthol, citronellol, nerol, linalool, ethyl linalool, thymol, eugenol, and p-menthane-3,8-diol. can give.
- the blending ratio of (a) to (b) is preferably 0.1 to 1.0 times. Within this range, a high repellent effect against flying insects was confirmed.
- fragrance ingredients such as monoterpene hydrocarbons such as limonene, monoterpene ketones such as menthone, carvone, pregon, camphor, damascon, citral, citronellal, neral, perilla Monoterpene-based aldehydes such as aldehydes, ester compounds such as cinnamyl formate and geranyl formate, phenylethyl alcohol, diphenyl oxide, indole aroma, or various essential oils containing the perfume ingredients such as jasmine oil, neroli oil, Peppermint oil, bergamot oil, orange oil, geranium oil, petitgren oil, lemon oil, citronella oil, lemongrass oil, cinnamon oil, eucalyptus oil, lemon eucalyptus oil, thyme oil and the like may be added as appropriate.
- monoterpene hydrocarbons such as limonene, monoterpene ketones such as menthone, carvone, pregon, camphor
- glycol and / or glycol ether having a vapor pressure at 20 ° C. of 0.2 to 20 Pa.
- glycols and / or glycol ethers are listed as solvents in the same manner as ethanol, isopropanol, kerosene and the like, and no effect on flying pests is mentioned.
- glycol ether not only as a solvent, but also has a long-lasting effect on flying insect pest repellents, and if an aromatic flying insect repellent is used, the initial fragrance can be sustained. This is what we have learned.
- repellent effect sustained component including vapor pressure at 20 ° C.
- examples of the repellent effect sustained component include propylene glycol (10.7 Pa), dipropylene glycol (1.3 Pa), tripropylene glycol (0.67 Pa), diethylene glycol ( 3 Pa), triethylene glycol (1 Pa), 1,3-butylene glycol, hexylene glycol (6.7 Pa), benzyl glycol (2.7 Pa), diethylene glycol monobutyl ether (3 Pa), dipropylene glycol monobutyl ether, and tripropylene Examples thereof include glycol monomethyl ether, and dipropylene glycol is particularly preferable. *
- the blending ratio of the repellent effect sustaining component to the flying insect repellent is preferably 0.2 to 10 times. In this range, it was confirmed that the repellent effect could be sufficiently maintained against the flying insect repellent.
- the blending ratio of the composition to the room temperature volatile pyrethroid insect repellent component is suitably about 0.2 to 2 times. If the amount of the fragrance composition is small, the purpose of imparting the fragrance cannot be achieved. On the other hand, if the amount is too large, the fragrance is too strong or the volatilization of the insect repellent component may be affected.
- the flying insect repellent fragrance composition when preparing the insect repellent component-containing resin pellet, the flying insect repellent fragrance composition may be contained, but the insect repellent component-containing resin pellet and the flying insect repellent fragrance It is preferable to knead both pellets after preparing each component-containing pellet. This is because the heating temperature at the time of manufacture of the flying insect pest repellent component-containing pellets is 90 to 130 ° C., which is lower than 110 to 140 ° C. in the case of the insect repellent component-containing resin pellets. This is because it is advantageous for reducing the loss for a high fragrance composition.
- the content of the room temperature volatile pyrethroid insect repellent component carried on the resin carrier of the drug volatilization body is not particularly limited because it varies depending on the type of insect repellent component used, the use environment, the use conditions, and the like. .
- the content is preferably in the range of 0.5 to 20% by mass.
- the content of the insect repellent component is less than 0.5% by mass, it becomes difficult to secure the amount of the insect repellent component necessary for exhibiting the insect repellent effect, while when the content of the insect repellent component exceeds 20% by mass. Is difficult to mold after kneading the insect repellent component, and moreover, the insect repellent component is excessively bleed on the surface of the resin carrier and is likely to cause stickiness.
- an amount of about 30 to 2000 mg can be raised corresponding to a use period of about 30 to 365 days.
- the minimum volatilization amount necessary for manifesting the insect repellent effect is 0.03 mg / hr or more
- profluthrin alone is 0.03 mg / hr or more
- transfluthrin alone is 0.06 mg / hr or more
- the content in the 30th to 365th days is 30 to 1000 mg for metofluthrin and 30 for proflothrin. It can be set in the range of ⁇ 1000 mg and in the case of transfluthrin in the range of 60 to 2000 mg.
- the chemical volatilization body of the present invention can contain the above-mentioned flying insect repellent composition for the purpose of imparting a scent and reinforcing the insect-repellent effect particularly in the initial stage of use.
- a long-lasting fragrance component that is in the range of 250 to 400 ° C. and can maintain the fragrance for a longer period of time may be blended.
- the period when the insecticidal effect is obtained by the room temperature volatile pyrethroid insect repellent and the period when the aroma effect is obtained by the persistent perfume ingredient can be linked, and the display function of the insect repellent effect can be realized by sensing the aroma. It is.
- Examples of such persistent perfume ingredients include galaxolide, musk ketone, hexyl cinnamic aldehyde, ethylene brushate, methyl atrate, hexyl salicylate, tricyclodecenyl acetate, orange crystal, ambroxan, cachemelan, caron, helio Tropine, indole aroma, indole, methyl cedryl ketone, methyl ⁇ -naphthyl ketone, methyl dihydrojasmonate, rosephenone, and 7-acetyl-1,2,3,4,5,6,7,8-octahydro- 1,1,6,7-tetramethylnaphthalene and the like.
- synergists, repellents, antibacterial agents, antifungal agents, and other functional components can be used at the same time.
- isobornyl thiocyanoacetate (trade name: IBTA) N-octylbicycloheptenecarboximide (trade name: sinepiline 222), N- (2-ethylhexyl) -1-isopropyl-4-methylbicyclo [2,2,2] oct-5-ene-2,3- And dicarboximide (trade name: Sinepirine 500).
- Examples of the repellent include N, N-diethyl-m-toluamide (trade name: Diet), dimethyl phthalate, dibutyl phthalate, 2-ethyl-1,3-hexanediol, 1,4,4a, 5a, 6, 9,9a, 9b-octahydrodibenzofuran-4a-carbaldehyde and the like.
- antibacterial agent examples include hinokitiol, tetrahydrolinalool, eugenol, citronellal, allyl isothiocyanate and the like.
- antifungal agent examples include isopropylmethylphenol and orthophenylphenol.
- Examples of the other functional components include stress-reducing components containing green leaf alcohol and green leaf aldehyde called “green fragrance”.
- colorants color pigments
- antistatic agents etc. may be added as appropriate. Adding color or attaching a time indicator to make the end of use more visible increases the commercial value. Can do.
- the room temperature volatile pyrethroid insect repellent component used in the present invention has sufficient stability, but in order to further improve the stability, it is also possible to add a stabilizer such as an antioxidant, for example, 2,2'-methylenebis (4-ethyl-6-t-butylphenol), 4,4'-methylenebis (2-methyl-6-t-butylphenol), BHT, BHA, 3,5-di-t-butyl- 4-hydroxyanisole, mercaptobenzimidazole, etc. can be used.
- a stabilizer such as an antioxidant, for example, 2,2'-methylenebis (4-ethyl-6-t-butylphenol), 4,4'-methylenebis (2-methyl-6-t-butylphenol), BHT, BHA, 3,5-di-t-butyl- 4-hydroxyanisole, mercaptobenzimidazole, etc.
- ultraviolet absorbers such as paraaminobenzoic acids, cinnamic acids, salicylic acids, benzophenones and benzotriazoles as ultraviolet absorption inhibitors, the light resistance during storage and use can be further improved.
- a chemical volatilization body is accommodated and used for a storage container.
- the plastic container for storing the chemical volatilization body is not particularly limited in shape and size as long as it can stably volatilize the room temperature volatile pyrethroid insect repellent component, but from the point of volatilization efficiency,
- the ratio (opening ratio) in the container is preferably in the range of 10 to 50% with respect to the total surface area of the container.
- an opening part may open to a side surface, an upper surface, and a lower surface as well as a thing in the front and back surface of a container.
- the shape of the opening is not particularly limited.
- the shape of the plastic container is not particularly limited, and if the resin carrier is cylindrical, the container may be cylindrical corresponding to this, for example, when applied to an air purifier mounting. Can be used by simply simplifying the container and holding the resin carrier.
- Examples of the structure of the plastic container include a bent plastic member in the form of a flat sheet and an integrally molded product of plastic.
- the container When the flat sheet-shaped plastic member is folded, the container is assembled so that the folded surfaces of the respective members overlap with each other using the two folded members as a set.
- a tongue portion with a notch can be provided at the end of the bent surface of the bent member, and the hook portion can be extended so that it can be folded up.
- a storage window for folding the hook portion may be provided above the back surface.
- the plastic integrally molded product may be any molding method as long as it is molded by normal injection molding or vacuum molding, but the upper surface and the lower surface, the front surface and the rear surface may be integrated using a hinge. If integrated by fitting, the manufacturing process can be further simplified. Further, in this case, if the hook portion is provided on the upper surface portion of the container so that it can be raised, it can be used more effectively.
- which part of the container is to be locked is a matter to be appropriately selected during manufacturing, but if the container is locked on the same surface as the surface on which the hook portion is provided, the container can be removed from the installation position during use. Since it can prevent moving, it is preferable.
- plastic materials such as polyethylene terephthalate, polyethylene, polypropylene, polybutylene terephthalate, nylon, polyamide, etc. can be used as the plastic material used for these flat sheet-shaped plastic members and plastic integrally molded products.
- PET polyethylene terephthalate
- PBT polybutylene terephthalate
- plastics can be used, but those having a thickness of 0.05 to 2 mm may be used from the viewpoint of the shape of the resin carrier, its volatilization performance, economy, etc. preferable.
- the chemical volatilization body of the present invention is generally marketed after being stored in a storage container and then stored in a drug-impermeable film bag, and used when opened.
- a drug-impermeable film bag examples include polyester (PET, PBT, etc.), polyamide, polyacetal, polyacrylonitrile, and the like, and the thickness thereof is determined within a range that does not impair flexibility.
- the inner surface of these drug-impermeable films can be laminated with polyethylene, polypropylene film or the like.
- the chemical volatilized body prepared by the present invention has a living room, a Japanese-style room, a room such as an entrance, a warehouse, a restaurant, a factory, a work shop, and its doorway for a predetermined period according to its design specifications from just after use to about 365 days.
- Livestock houses such as poultry houses and pig houses, pet sheds such as kennels and rabbit huts and their surroundings, inside septic tanks and manholes, inside tents and entrances of camping, barbecue, fishing, gardening and other outdoor activities
- mosquitoes such as mosquitoes, chikaeka, and mosquitoes, flyfish, chironomids, flies, butterflies, moths and the like.
- the chemical volatilization body can be formed in a cylindrical shape for attaching a lead for a pet dog, or the container can be appropriately simplified and used for attaching an air purifier or the like.
- the chemical volatilization body of this invention can be stably manufactured on quality by having the said structure.
- the weight, size, and minimum mesh area of the chemical volatilizer are as shown in Table 1. Based on said method, the volatilization amount before and behind the water retention ratio test was measured using the obtained chemical volatilization body. The results are shown in Table 1.
- Example 6 Comparative Examples 2 and 3
- a plain structure was knitted on both sides using a PET processed yarn as a drug-impregnated body, and the both sides were joined by a twisted filament to produce a three-dimensional structure (knitted fabric) having the size shown in Table 1.
- the weight, size, and minimum mesh area of the three-dimensional structure are as shown in Table 1.
- a chemical solution obtained by dissolving the volatile pyrethroid insect repellent components in the amount shown in Table 1 in 0.25 g of acetone was held in the three-dimensional structure. Based on said method, the volatilization amount before and behind the water retention ratio test was measured using the obtained chemical volatilization body. The results are shown in Table 1.
- the examples of the present invention in which the water retention ratio is in the range of 0.005 or more and 0.5 or less show a small reduction in the amount of insecticidal component volatilization immediately after the water retention ratio test, and to the insecticidal component volatility due to the attachment of rainwater The effect of was slight.
- the water retention ratio tended to be high in the case of a three-dimensional structure having a small mesh area or a twisted filament.
- Comparative Example 1 to Comparative Example 3 in which the water retention ratio exceeded 0.5 the volatilization amount immediately after the water retention ratio test was remarkably suppressed, and there was a concern about a decrease in the insect repellent effect.
- the present invention can be used in the field of pest control using a chemical volatilizer.
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Abstract
Description
例えば、下記特許文献1には、撚った糸で作製したネット状物に防虫剤成分を含浸させたものを複数枚用いた薬剤揮散体が開示されている。
また、下記特許文献2には、樹脂成形体の表面に複数本の溝を300μm以下の間隔で形成し、害虫防除活性成分のベタツキを防止した害虫防除用成形体が開示されている。
(1)常温揮散性ピレスロイド系防虫成分を含有する繊維状物からなるメッシュを有する構造体からなる薬剤揮散体において、前記繊維状物は、樹脂フィラメントからなり、前記構造体の重量に対する、前記構造体が保水し得る量である保水比が、0.005以上0.5以下であることを特徴とする薬剤揮散体。
(2)前記構造体のメッシュ部分の目の大きさは、10mm2以上200mm2以下であることを特徴とする(1)に記載の薬剤揮散体。
(3)前記樹脂フィラメントは、前記常温揮散性ピレスロイド系防虫成分を樹脂担体に混練した後、成形したものであることを特徴とする(1)又は(2)に記載の薬剤揮散体。
前記の常温揮散性ピレスロイド系防虫成分としては、常温において空気中に揮散する性質を有し、25℃における蒸気圧が0.001Pa以上0.1Pa以下程度であるものが好ましい。具体的には、揮散性能と安全性等の点から、メトフルトリン、プロフルトリン、トランスフルトリン、及びエムペントリンの少なくとも1種があげられる。なお、これらの防虫成分については、各種の光学異性体または幾何異性体が存在するが、単独、混合物であれ、いずれの異性体類も使用することができる。
上記繊維状物は、繊維状に構成されたものをいい、長繊維(フィラメント)そのものや、長繊維や短繊維を撚り合わせて繊維状としたもの等があげられる。一般に、撚り合わせた繊維状物を用いることによって保水比が高くなる傾向があるが、その値が所定範囲内であれば本発明の効果を奏し得るので差し支えない。この発明においては、長繊維(フィラメント)を用いるのがよく、特に材料として後述する樹脂担体を含有する樹脂組成物を用いて成形して得られる樹脂製の長繊維(樹脂フィラメント)を用いると、耐久性が高くなり好ましい。
樹脂組成物は、樹脂担体に、必要に応じて微粉末担体、及び他の樹脂担体を混練したものである。なお、この樹脂組成物は、一旦、ペレットに成形された後、上記の成形を行うことが効率上好ましい。
樹脂担体としては、常温揮散性ピレスロイド系防虫成分を練り込むか、又は含浸させるかによって幾分異なる。即ち、前者の場合、担体の内部に混入された防虫成分が徐々に表面にブリードして揮散することができるものであれば特に限定されず、例えば、ポリエチレン系樹脂やポリプロピレン系樹脂のようなポリオレフィン系樹脂、あるいはこれらにカルボン酸エステル等の単量体を重合させて成形したものを挙げることができる。ここでカルボン酸エステル等の単量体は、前記防虫成分の樹脂担体表面からの揮散をコントロールするのに効果的なものであり、例えば、アクリル酸メチル、アクリル酸エチル、メタクリル酸メチル、メタクリル酸エチル、酢酸ビニル等が挙げられる。
平面状もしくは立体状メッシュを構成した樹脂担体の表面に防虫成分を担持させ揮散に供するのであるが、かかる樹脂に上記したポリオレフィン系樹脂やスチレン系熱可塑性エラストマー、あるいはレーヨン等の樹脂を混紡して樹脂担体を改質し、防虫成分の揮散性を調整することもできる。
以下、常温揮散性ピレスロイド系防虫成分を練り込むタイプの薬剤揮散体について詳述する。
本発明で用いる前記の微粉末担体は、樹脂ペレット内に常温揮散性ピレスロイド系防虫成分を担持するために添加することができる成分である。例えば、いわゆるホワイトカーボンとよばれる微結晶シリカや微粉末ケイ酸、珪藻土、ゼオライト類、粘度鉱物、木粉等が挙げられる。
更に、前記樹脂組成物の重量調整や物性の調整のために、前記のエチレン-ビニルアセテート共重合体等の樹脂担体の他に、他の樹脂担体を混練させてもよい。他の樹脂担体として、ポリオレフィン系樹脂やスチレン系樹脂を含有してもよい。このポリオレフィン系樹脂としては、ポリエチレン(PE)、ポリプロピレン(PP)などがあげられるが、エチレン-ビニルアセテート共重合体やエチレン-メタクリル酸メチル共重合体との親和性から、ポリエチレンが好ましく、成形性の点で特に低密度ポリエチレン、具体的には分岐低密度ポリエチレン(LDPE)、鎖状低密度ポリエチレン(LLDPE)が好ましい。
前記樹脂担体の配合量は、前記樹脂組成物全体に対して、10質量%以上含有すると好ましく、20質量%以上であるとより好ましい。10質量%未満では、過度なブリードを抑制する効果が不十分になってしまう。一方、上限は90質量%以下であると好ましく、60質量%以下であるとより好ましい。多すぎると、前記樹脂組成物のペレットをマスターバッチとして用い、前記他の樹脂担体と混練して得られた樹脂成形体においてもブリードを抑制しすぎてしまい、本来の目的である常温揮散性ピレスロイド系防虫成分の揮散による防虫効果が過度に低減される恐れを有するためである。本発明によれば、10質量%以上90質量%以下のエチレン-ビニルアセテート共重合体及び/又はエチレン-メタクリル酸メチル共重合体と混練させることにより、得られる樹脂ペレットのブリードを適度な範囲で調整することが可能となる。
また、前記微粉末担体の前記樹脂組成物全体に対する含有量の下限値は、特に限定されるものではないが、過度なブリードを抑制する必要があるような場合においては、10質量%以上に設定するのが好ましい。この下限値より少ないと、その抑制効果が不十分になってしまうことがある。
上記樹脂組成物は、前記樹脂担体を加熱し、ここに前記常温揮散性ピレスロイド系防虫成分、必要に応じて、微粉末担体や、加熱した他の樹脂担体を混練することにより得られる。そして、これをペレット化して冷却することによりペレットを得ることができる。
ところで、上記の他の樹脂担体は、前記の通り、前記樹脂組成物のペレットの製造段階に含有させてもよく、また、この他の樹脂担体を含有させずに前記樹脂組成物のペレットを成形し、次いで、このペレットを前記他の樹脂担体を用いて希釈し、混練・成形することにより、前記薬剤揮散体を得てもよい。
前記の樹脂組成物からなるペレットは、成形されて薬剤揮散体とする。また、前記の通り、前記の防虫成分含有樹脂ペレットに前記他の樹脂担体が含有されていない場合は、前記防虫成分含有樹脂ペレットを前記他の樹脂担体を用いて希釈し、混練・成形して薬剤揮散体としてもよい。
なお、周縁部は、立体構造体の強度、形状、外部容器等との関係で、適宜決定される。
前記構造体の保水比、すなわち、前記構造体の重量に対する、前記構造体が保水し得る量(構造体が保水し得る量(重量部)/構造体の重量(重量部))は、0.005以上がよく、0.01以上が好ましい。0.005より小さいと、メッシュ成形等製造上の不都合を生じる場合がある。一方、保水比の上限は、0.5がよく、0.4が好ましい。0.5より大きいと、雨水が常温揮散性防虫成分の揮散を著しく抑制し、期待する防虫効果が得られないという問題点を生じる場合がある。なお、構造体が保水し得る量とは、構造体のくぼみや隙間に物理的に付着する水の量を意味する。
上記メッシュの大きさは、前記構造体のメッシュ部分の目の大きさ、すなわち、前記構造体のメッシュ部分であって、各樹脂フィラメントで囲まれた1つの目(最小網目)が構成する表面積(周囲の樹脂フィラメントの中心線で囲まれた面積)は、10mm2以上がよく、20mm2以上が好ましい。10mm2より狭いと、付着した水が張力により網目を塞ぐ可能性が高くなり、網目を通る空気の流れが遮断される結果、防虫成分の揮散が抑制されるという問題点を生じる場合がある。一方、表面積の上限は、200mm2がよく、150mm2が好ましい。200mm2より広いと、メッシュ強度が弱く変形しやすいため取扱いにくくなるうえ、防虫成分を含有する構造体の表面積が不足するという問題点を生じる場合がある。
ところで、本発明の薬剤揮散体には、前記常温揮散性ピレスロイド系防虫成分に加えて、特に使用の初期段階における香りの付与と防虫効果の補強を目的として、常温揮散性ピレスロイド系防虫成分に加えて、飛翔害虫忌避香料組成物を含有することができる。
CH3-COO-R1 (I)
(式中、R1は炭素数が6~12のアルコール残基を示す。)
R2-CH2-COO-CH2-CH=CH2 (II)
(式中、R2は炭素数が4~7のアルキル基、アルコキシ基、シクロアルキル基、シクロアルコキシ基、又はフェノキシ基を示す。)
前記薬剤揮散体の樹脂担体に担持される前記常温揮散性ピレスロイド系防虫成分の含有量は、使用する防虫成分の種類、使用環境、使用条件などによって変動することから、特に限定されるものではない。しかしながら、防虫効果に必要な防虫成分量を確保し、また防虫成分を練り込んだ後の成形を容易にするため、さらに樹脂担体の表面に防虫成分が過剰にブリードしてベタツキを起こすことを防止するために、0.5~20質量%の範囲にすることが好ましい。
本発明の薬剤揮散体は、前述したとおり、特に使用の初期段階における香りの付与と防虫効果の補強を目的として、前記飛翔害虫忌避香料組成物を含有することができるが、加えて、沸点が250~400℃の範囲にあり、より長期間にわたり芳香を持続させうる持続性香料成分を配合しても構わない。
この場合、常温揮散性ピレスロイド系防虫成分によって防虫効果が得られている期間と持続性香料成分によって芳香効果が得られる期間とを連動させ、芳香の感知をもって防虫効果の表示機能ならしめることも可能である。かかる持続性香料成分としては、例えば、ガラクソリド、ムスクケトン、ヘキシルシンナミックアルデヒド、エチレンブラシレート、メチルアトラレート、ヘキシルサリシレート、トリシクロデセニルアセテート、オレンジャークリスタル、アンブロキサン、キャシュメラン、カロン、ヘリオトロピン、インドールアロマ、インドール、メチルセドリルケトン、メチルβ-ナフチルケトン、メチルジヒドロジャスモネート、ローズフェノン、及び7-アセチル-1,2,3,4,5,6,7,8-オクタヒドロ-1,1,6,7-テトラメチルナフタレン等があげられる。
本発明において、薬剤揮散体は、収納容器に収納されて使用される。この薬剤揮散体を収納するプラスチック容器としては、常温揮散性ピレスロイド系防虫成分を安定的に揮散できるものであれば、特に形状や大きさには限定されないが、揮散効率の点から、開口部の容器に占める比率(開口率)が、容器の全表面積に対し10~50%の範囲となるようにすることが好ましい。
本発明の薬剤揮散体は、一般的に収納容器に収納後、薬剤非透過性フィルム袋に収容されて市販され、使用時に開袋して用いられる。もちろん、薬剤揮散体のみを薬剤非透過性フィルム袋に収容して市販し、使用時に袋から取り出された薬剤揮散体を収納容器に装填するようにしてもよい。ここで、薬剤非透過性フィルム袋の材質としては、ポリエステル(PET、PBTなど)、ポリアミド、ポリアセタール、ポリアクリルニトリルなどがあげられ、その肉厚は可撓性を損なわない範囲で決定される。なお、ヒートシール性を付与するために、これら薬剤非透過性フィルムの内面をポリエチレンやポリプロピレンフィルム等でラミネートすることもできる。
本発明によって調製される薬剤揮散体は、使用直後からおよそ365日間までのその設計仕様に応じた所定期間にわたり、リビングや和室、玄関などの室内、倉庫、飲食店、工場や作業場内部やその出入り口、鶏舎、豚舎等の畜舎、犬小屋、ウサギ小屋等のペット小屋やその周辺、浄化槽やマンホールの内部、キャンプなどにおけるテント内部やその出入り口、バーベキュー、釣り、ガーデニング等の野外活動場所やその周辺などで、アカイエカ、チカイエカ、ヒトスジシマカ等の蚊類、ブユ、ユスリカ類、ハエ類、チョウバエ類、イガ類等に対して優れた防虫効果を奏する。また、室内と室外を隔てる窓やベランダ等の場所で、例えばそのフック部をカーテンレール等に引っ掛けたり、物干し竿に吊るして使用すれば、屋外から屋内へのこれら害虫の侵入を効果的に防ぐこともでき、極めて実用的である。
本発明の薬剤揮散体は、前記の構成を有することにより、品質上安定して製造することができる。
まず、使用した薬剤、及び性能の評価方法について説明する。
・メトフルトリン(住友化学(株)製:エミネンス)
・トランスフルトリン(住友化学(株)製:バイオスリン)
・プロフルトリン(住友化学(株)製:フェアリテール)
・微結晶シリカ(EVONIK社製:カープレックス#80、ホワイトカーボン、平均粒子径:15μm、以降「シリカ」と記す。)
・エチレン-ビニルアセテート共重合体(東ソー(株)製:ウルトラセン710、エチレン:酢酸ビニル単位比=72:28、以降「EVA」と記す。)
・低密度ポリエチレン(旭化成(株)製:サンテックLDM6520、以降「LDPE-A」と記す。)
・低密度ポリエチレン(日本ポリエチレン(株)製:ノバテックLDLJ802、以降「LDPE-B」と記す。)
・ポリエチレンテレフタレート((株)ベルポリエステルプロダクツ製:ベルペットIP121B、以降「PET」と称す。)
得られた薬剤揮散体を水に3分間浸漬した後、ゆっくりと引き上げ、下記の式にて保水比を算出した。
保水比=(薬剤揮散体に付着した水の重量)/(薬剤揮散体の重量)
得られた薬剤揮散体を25℃の室内で、風速1m/秒の条件下で1日間揮散させ、薬剤揮散体中に含まれる有効成分量をガスクロマトグラフィーにより測定し、揮散量を算出した。更に、上記の保水比測定試験後、直ちに同条件下で2日間揮散させ、2日間の薬剤揮散量を算出し、1日当たりに換算した。保水比試験前後における薬剤揮散量を対比して保水比との関連性を調べた。
<樹脂ペレットの製造方法>
表1に記載の常温揮散性ピレスロイド系防虫成分10重量部を50℃に加温してシリカ6重量部に担持させた後、これにEVA40重量部、及びLDPE-A44重量部を、(株)テクノベル製:二軸押出し成形機を用いて、120~140℃で混練・押出成形し、直径3mm、長さ5mmの常温揮散性ピレスロイド系防虫成分含有樹脂ペレットを製造した。
前記常温揮散性ピレスロイド系防虫成分含有樹脂ペレット100重量部とLDPE-B300重量部(着色剤ペレット10重量部を含む)を120~140℃で混練後、インジェクション又は押出し成形機に投入し、図1に示す平面状ネット(実施例7~9)及び図2に示す立体構造体(実施例1~5、比較例1)からなる薬剤揮散体を得た。
なお、薬剤揮散体の重量、大きさ、最小網目の面積は、表1に示すとおりである。
得られた薬剤揮散体を用いて、上記の方法に基づいて、保水比及び保水比試験前後の揮散量を測定した。その結果を表1に示す。
薬剤含浸体としてPET加工糸を用いてプレーン組織を両面に編成し、この両面を撚り合わせたフィラメントで繋ぎ、表1に示す大きさの立体構造体(編地)を作製した。
なお、立体構造体の重量、大きさ、最小網目の面積は、表1に示すとおりである。
表1に記載の量の常温揮散性ピレスロイド系防虫成分をアセトン0.25gに溶解した薬液を前記立体構造体に保持させた。得られた薬剤揮散体を用いて、上記の方法に基づいて、保水比及び保水比試験前後の揮散量を測定した。その結果を表1に示す。
これに対し、保水比が0.5を超える比較例1から比較例3では、保水比試験直後の揮散量が著しく抑制され、防虫効果の低下が危惧された。
2 立体構造体
21 矩形波状体
21a 第1頂部
21b 第2頂部
22 補強材
Claims (3)
- 常温揮散性ピレスロイド系防虫成分を含有する繊維状物からなるメッシュを有する構造体からなる薬剤揮散体において、
前記繊維状物は、樹脂フィラメントからなり、
前記構造体の重量に対する、前記構造体が保水し得る量である保水比が、0.005以上0.5以下であることを特徴とする薬剤揮散体。 - 前記構造体のメッシュ部分の目の大きさは、10mm2以上200mm2以下であることを特徴とする請求項1に記載の薬剤揮散体。
- 前記樹脂フィラメントは、前記常温揮散性ピレスロイド系防虫成分を樹脂担体に混練した後、成形したものであることを特徴とする請求項1又は2に記載の薬剤揮散体。
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JP2014543237A JP6199877B2 (ja) | 2012-10-22 | 2013-10-15 | 薬剤揮散体 |
CN201380054669.2A CN104735978B (zh) | 2012-10-22 | 2013-10-15 | 药剂挥发体 |
KR1020157012989A KR102036951B1 (ko) | 2012-10-22 | 2013-10-15 | 약제 휘산체 |
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JP2020105110A (ja) * | 2018-12-27 | 2020-07-09 | 住化エンバイロメンタルサイエンス株式会社 | 樹脂成形体及び樹脂製品 |
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JP7495101B2 (ja) | 2019-03-28 | 2024-06-04 | 住化エンバイロメンタルサイエンス株式会社 | 匍匐害虫用忌避剤 |
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JP7228234B2 (ja) * | 2019-02-13 | 2023-02-24 | 住化エンバイロメンタルサイエンス株式会社 | 害虫防除用樹脂成形体の製造方法 |
JP7297287B2 (ja) * | 2019-02-13 | 2023-06-26 | 住化エンバイロメンタルサイエンス株式会社 | 害虫防除用樹脂成形体の製造方法 |
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AU2013335918B2 (en) | 2016-11-17 |
TW201422156A (zh) | 2014-06-16 |
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JP6408091B2 (ja) | 2018-10-17 |
KR20150070368A (ko) | 2015-06-24 |
AU2013335918A1 (en) | 2015-05-14 |
JP6529554B2 (ja) | 2019-06-12 |
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TWI555470B (zh) | 2016-11-01 |
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