JP2003250417A - Thermal evaporation method and thermal evaporation container used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermal evaporation method by which a chemical can efficiently be evaporated, and to provide a thermal evaporation container used therefor. <P>SOLUTION: This thermal evaporation method for controlling insect pests is characterized by thermally evaporating an insecticide technical product or an added insecticide technical product obtained by adding an additive to the insecticide technical product. For example, an insecticide technical product 3 is received in a container 5, and the container 5 is then heated to thermally evaporate the insecticide technical product. Thereby, the insecticide ingredient can efficiently be evaporated, and a solvent is not needed on the thermal evaporation. Hence, the distinction of an aqueous solvent from an oily solvent on the employment of the solvent is not necessitated, and a container and a heater for the thermal evaporation can be compacted. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat evaporation method used for controlling pests indoors and the like, and a heat evaporation container used for the method.

[0002]

2. Description of the Related Art Conventionally, as a heating evaporation method for controlling pests, a method of absorbing an insecticide liquid by using an absorbent core and heating it to evaporate, or adsorbing it on a porous base material (solid mat) such as a fiber board is used. It is known that the insecticide is heated and evaporated.

In the former case, since the insecticide is used in the form of a solution, the formulation containing water has poor volatilization stability and is not suitable for evaporating the drug for a long time. In the case of the latter mat type, although it is a solvent-free type, the residual ratio of the drug is high and stable long-term volatilization cannot be expected.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a heating evaporation method capable of efficiently evaporating a drug and a heating evaporation container used for the method.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that when the insecticidal drug substance is intentionally heated, it is much more efficient than when an insecticidal solution containing water is used. The inventors have found the new fact that they can be volatilized and can be stably volatilized for a long period of time, and completed the present invention. Further, in the present invention, since the insecticidal drug substance is evaporated by heating, a solvent is not used at the time of evaporation by heating, so that it is not necessary to distinguish between aqueous and oily substances like a liquid agent, and the container and the device are compact.

That is, the heat evaporation method of the present invention is a method for controlling insect pests, and is characterized in that an insecticidal drug substance or an added insecticidal drug substance containing an additive is heated and evaporated. .

The insecticidal drug substance in the present invention means an insecticide component itself containing no solvent, and may be a mixture of two or more insecticide components. Since the insecticidal drug substance is the insecticide component itself, the solventless insecticidal mat is not included in the present invention. In addition, the term "added insecticidal drug substance" as used in the present invention refers to the above-mentioned insecticidal drug substance to which a stabilizer, an antioxidant, an anti-UV agent, a colorant and the like have been added.

In the heat evaporation method of the present invention, it is preferable that the insecticidal drug substance or the added insecticidal drug substance is contained in a container and the container is heated to evaporate the insecticidal drug substance or the added insecticidal drug substance. .

In the heat evaporation method of the present invention, the insecticidal drug substance or the added insecticidal drug substance may be evaporated while the gas permeable film is in contact with the liquid surface of the insecticidal drug substance or the added insecticidal drug substance. Thereby, the volatilization amount of the insecticidal component can be increased.

In the heat evaporation method of the present invention, the insecticidal drug substance or the added insecticidal drug substance can be evaporated while the liquid surface of the insecticidal drug substance or the added insecticidal drug substance is open in the evaporation space. Thereby, the volatilization amount of the insecticidal component can be increased. Here, the "transpiration space" means a space for controlling harmful insects by the heating evaporation method of the present invention, for example, in the air atmosphere of a living room in the home, a kitchen or the like.

As the heating evaporation container used in the above-described heating evaporation method of the present invention, a container body containing the insecticidal drug substance or the added insecticidal drug substance containing an additive therein, and the evaporation port of the container body. With a gas permeable film for closing the, insecticidal drug substance or a container body containing an added insecticidal drug substance containing an additive thereto, and a liquid of the insecticidal drug substance or the added insecticidal drug substance at least during heat evaporation. Those provided with a gas permeable film that contacts the surface can be used.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The insecticidal drug substance that can be used in the present invention may be any insecticidal drug substance that is evaporated by heating and exhibits a controlling effect against harmful insects. Examples of such insecticidal solids include transfluthrin, "S-1264" (Sumitomo Chemical Co., Ltd.), vaporthrin, flamethrin,
d-T80-flamethrin, empentrin, phenothrin,
Resmethrin, phthalthrin, d-T80-phthalthrin,
(1S) -1-Ethynyl-2-methyl-2-pentenyl- (1R) -trans-3- (2,2-dichloroethenyl) -2,2-dimethylcyclopropanecarboxylate (hereinafter referred to as compound A) , 1-ethynyl-2-methyl-2-pentenyl-3- (2,2-dichloroethenyl) -2,2-dimethylcyclopropanecarboxylate (hereinafter referred to as compound B), and isomers thereof, and further bifenthrin. , Fenfenoxuron, amidoflumet, and the like, but are not limited thereto. The insecticidal drug substance may be liquid or solid, but is preferably liquid. In the case of liquid, the vapor pressure of insecticide is 4.8 × 10 ^-6 (25 ° C) mm
Hg or more, preferably 4.8 × 10 ^{−6 to} 6.0 × 10 ⁻³
(25 ° C.) mmHg is preferable.

The additives to be added to the added insecticidal drug substance in the present invention include stabilizers, antioxidants, anti-UV agents,
Colorants and the like can be mentioned, and one or more of them are added as necessary.

As the antioxidant, for example, 3,5-di-
t-butyl-4-hydroxytoluene, 3-t-butyl-4-hydroxyanisole, 3,5-di-t-butyl-4-hydroxyanisole, mercaptobenzimidazole, dilauryl-thio-di-propionate, 2-
t-butyl-4-methoxyphenol, 3-t-butyl-4-methoxyphenol, 2,6-di-t-butyl-
4-ethylphenol, stearyl-β- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, α-tocopherol, ascorbic acid, erythorbic acid, 2,2'-methylene-bis (6-t- Butyl-4-
Methylphenol), 2,2'-methylene-bis (6-t
-Butyl-4-ethylphenol), 4,4'-methylene-bis (2,6-di-t-butylphenol), 4,4
'-Butylidene-bis (6-t-butyl-3-methylphenol), 4,4'-thio-bis (6-t-butyl-3)
-Methylphenol), 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,3,5-trimethyl-2,
4,6-Tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, tris (2-methyl-4-hydroxy-5-t-butylphenyl) butane, tetrakis
[Methylene (3,5-di-t-butyl-4-hydroxyhydrocinnamate)] methane, octadecyl-3,5-di-t-butyl-4-hydroxyhydrocinnamate, phenyl-β-naphthylamine, N, N-diphenyl-p
-Phenylenediamine, 2,2,4-trimethyl-1,
3-dihydroquinoline polymer, 6-ethoxy-2,2,
4-trimethyl-1,3-dihydroquinoline, tetrakis [methylene 3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane and the like can be mentioned. The colorant can be selected from, for example, azo dyes, anthraquinone dyes, and combinations of two or more of these dyes. Specifically, for example, blue 403
No. 403, orange No. 403, green No. 202, purple No. 201, red No. 225, yellow No. 204 and the like.

These additives may be added in the minimum necessary amount, and usually, the stabilizer is not more than about 5% by weight, the antioxidant is not more than about 5% by weight, and the anti-UV agent is based on the total amount of the pesticidal substance added. Is about 5% by weight or less. The amount of the colorant added is 0.001 to 0.1% by weight, preferably 0.01 to 0.1% by weight, based on the total amount. This allows
The transpiration property of the insecticidal substance is not affected, and the visibility from a long distance and the visibility of the end point are improved.

In addition to the above, various kinds of additives such as commonly used potency enhancers, volatilization rate improvers, deodorants and fragrances may be added. Examples of the efficacy enhancer include piperonyl butoxide, N-propylisome,
MGK-264, Cinepyrine 222, Cinepyrine 5
00, Reisen 384, IBTA, S421 and the like, volatilization rate improvers such as phenethyl isothiocyanate and dimethyl hymitixate, deodorants such as lauric acid methacrylate (LMA), and fragrances such as citral and citronellal. Etc. can be illustrated respectively.

The above insecticidal drug substance or the added insecticidal drug substance (hereinafter,
The insecticidal drug substance is described as a representative), and it is evaporated by placing it in a container and heating the container. As the heating evaporation container to be used, any container can be used as long as it has a structure capable of evaporating the insecticide component from the container.

FIG. 1 shows an example of the heating evaporation container as described above. In this heating evaporation container, a concave portion 2 is provided in the center of a heat resistant sheet 1 such as a metal sheet of aluminum or the like, a heat resistant resin sheet or the like, and the insecticidal drug substance is accommodated in the concave portion 2.

In the present invention, as shown in FIG. 2, a heating evaporation container 5 having a structure in which the evaporation port on the upper surface of the recess 2 accommodating the insecticidal substance 3 is closed with a gas permeable film 4 may be used. As a result, the insecticidal drug substance 3 can be prevented from spilling from the container 5, and handling such as transportation becomes easy.

In use, the heating evaporation container 5 is placed on a heat radiating plate 7 having a heating element 6 at its lower part, as shown in FIG. Be heated. The insecticide component evaporated from the insecticidal substance 3 is diffused through the gas-permeable film 4 (the evaporated insecticide component is indicated by an arrow).

The amount of the insecticidal drug substance 3 to be contained in the container 5 is appropriately determined in accordance with the transpiration property of the drug to be used, the transpiration amount per unit time, the target transpiration duration, etc., and therefore is not particularly limited. Although not limited, it is usually about 75 to 4500 mg, preferably about 150 to 1500 mg. For example, the volatilization amount of the insecticide transfluthrin is 1.67 mg.
/ 2 hours, the amount of insecticidal solid 3 for 30 days is about 300 mg, and for 60 days, 1
The amounts for 20 days are about 600 mg and 1200 mg, respectively. Incidentally, transfluthrin should have an effective volatilization amount of at least 0.15 mg / 2 hours for controlling mosquitoes.

The depth and the internal volume of the recess 2 are not particularly limited because they change depending on the amount of the insecticidal solid 3 contained therein. For example, the depth of the recess 2 is about 0. Three
It can be appropriately determined depending on the amount of the insecticidal drug substance 3 within a range of -5 mm, preferably 0.5-4 mm.

Any gas permeable film 4 can be used as long as it can pass through the film 4 without hindering the volatilization of the drug component volatilized from the insecticidal substance. Examples of such a gas-permeable film 4 include stretched or unstretched polypropylene, polyethylene (for example, linear low-density polyethylene, low-density polyethylene, etc.), polyethylene terephthalate, polymethylpentene, and the like. These films may be used alone or in combination of two or more.

Further, a microporous film having a large number of fine holes formed in the film by laser light or the like can also be suitably used alone as a gas permeable film or by laminating it with another gas permeable film. . Furthermore, a porous film having holes formed with a needle or the like can be used alone or by laminating it with another gas permeable film. The gas permeable film 4 has a thickness of about 10 to 1
The thickness is preferably 00 μm, preferably 30 to 70 μm.

In selecting the gas permeable film 4 to be used, in addition to being a film effective for evaporation of the drug component, a significant change in appearance due to heating [for example, deterioration such as expansion and tearing, deterioration of film surface It is desirable to use those which do not have crystallization of active ingredient (wiping etc.). As such a film, for example, a composite film obtained by laminating two or more kinds of films can be mentioned. Specific examples thereof include a composite film in which the polyethylene or unstretched polypropylene is used as a sealant layer and stretched polypropylene, polyethylene terephthalate, and a perforated film (for example, perforated polyethylene terephthalate film) are attached to the outer surface of the sealant layer. Here, the sealant layer is directly bonded to the heating evaporation container 5,
A film for enhancing the adhesion and liquid tightness with the heating evaporation container 5. The thickness of the composite film may be in the range of about 10 to 100 μm of the gas permeable film 4 described above. The sealant layer may be provided alone on the upper surface of the container 5 (adhesive surface to the film 4).

In order to prevent the gas permeable film 4 from sticking to the bottom surface of the recess 2 due to the negative pressure in the recess 2 over time due to the volatilization of the drug, the heating evaporation container 5 has an air inlet port. (Not shown) may be provided to send air to the recess 2 sealed with the gas permeable film 4. Such an air inlet can be provided in a part of the gas permeable film 4, for example.

As a method for heating the insecticidal drug substance, it is possible to bring the insecticidal drug substance into direct contact with a heat source such as a heater to evaporate the heat, but as described above, the container 5 is placed on the heater such as the heat radiating plate 7. It is preferable to place it on the surface or heat it by providing a space or other inclusion between the container 5 and the heater if necessary.

The heating temperature of the insecticidal drug substance may be any temperature that is sufficient to evaporate an effective amount of the insecticide component, and the heating temperature is not particularly limited, but in the above heating method using a container. The heater temperature (for example, the surface temperature of the heat sink 2) is usually about 50 to 170 ° C, preferably 70 to 1 ° C.
It is preferably in the range of 30 ° C.

At this time, the surface temperature of the gas permeable film 4 is about 40 to 160 ° C, preferably about 60 to 120 ° C. The temperature of the insecticidal drug substance during heating in the container 5 is about 45 to 165 ° C, preferably about 65 to 12 ° C.
It should be 5 ° C. Specifically, the heating temperature can be determined based on the effective volatilization amount of each insecticide required for controlling pests such as mosquitoes.

As described above, according to the present invention, the insecticidal ingredient is heated and evaporated for about 12 hours per day at a temperature at which an effective amount of the insecticide ingredient is evaporated, so that the insecticide ingredient can be removed over a long period of 30 days or more. It can be transpired continuously.

In heating and evaporating the drug, the container 5 together with the heat radiating plate 7 were tilted so that the insecticidal substance 3 and the gas permeable film 4 were in contact with each other in advance or at the start of use. It is preferable to maintain the state in which the amount of reduction of the insecticidal drug substance in the container 5 due to transpiration is easy to distinguish from the transition of the liquid level of the insecticidal drug substance.
It can serve as an indicator mechanism showing the residual amount of the insecticidal substance, and can stabilize the transpiration amount for a long period of time. The inclination angle of the container 5 with respect to the horizontal plane is 10 to 90.
The suitable angle is 40 °, preferably 40 to 60 °.

Further, in the heat evaporation method of the present invention,
As shown in FIG. 3 (a), heating including a heat-resistant sheet 1 (container body) having a recess 2 accommodating an insecticidal substance 3 and a gas-permeable film 4 in contact with the liquid surface of the insecticidal substance 3 Using the evaporation container, the gas permeable film 4 is in contact with the liquid surface of the insecticidal drug substance 3 to heat and evaporate the insecticidal drug substance 3,
Alternatively, as shown in FIG. 3 (b), it is preferable to heat the insecticidal drug substance 3 in a state where the liquid surface of the insecticidal drug substance 3 is opened in the evaporation space, that is, without heating the gas permeable film 4. The volatilization amount of the component can be further increased.

In the case of the form shown in FIG. 3 (a), in order to bring the gas permeable film 4 and the insecticidal drug substance 3 into contact with each other even when the residual amount of the insecticidal drug substance 3 decreases as the insecticidal component evaporates. For example, the gas permeable film 4 may be preliminarily provided with slack, an insecticidal substance supplying means (not shown) for keeping the liquid level constant may be separately provided, or the container body may be inclined with respect to the horizontal plane. It may be held in a state (inclination angle 10 to 90 °, preferably about 40 to 60 °). Further, even when the gas permeable film 4 and the liquid surface of the insecticidal solid 3 are not in contact with each other in a horizontally held state like the heating evaporation container 5 shown in FIG. 2, at least during heating evaporation, The gas permeable film 4 can be brought into contact with the liquid surface of the insecticidal solid 3 by inclining the container 5 with respect to the horizontal plane. In the case of the form shown in FIG. 3 (a), the gas permeable film 4
The above-exemplified ones can be used. Particularly, when the one which permeates the insecticidal drug substance 3 and easily evaporates from the film surface, the amount of the insecticidal component vaporized can be increased.
Examples of such a liquid-permeable film through which the insecticidal drug substance 3 easily penetrates include polypropylene, polyethylene, and a copolymer of ethylene and propylene. These films may be used alone, or may be a laminate of two or more kinds. The thickness of the gas permeable film 4 is important because it is related to the ease of penetration of the insecticidal component and the amount of volatilization, and is preferably about 10 to 100.
The thickness is preferably about 25 to 75 μm.

On the other hand, in the case of the configuration shown in FIG. 3B, that is, the configuration in which the gas permeable film 4 is not used, the upper surface of the recess 2 is open as shown in the figure (the liquid surface of the insecticidal solid 3). Is opened in the evaporation space), it is preferable to use a heating evaporation container 11 as shown in FIGS. 4 (a) and 4 (b) below, for example.

FIGS. 4 (a) and 4 (b) show insecticidal solids 3 respectively.
FIG. 3 is a cross-sectional view of the heating evaporation container 11 having a structure that prevents spillage and a plan view of the heating evaporation container 11 with the film 14 removed. As shown in FIGS. 4 (a) and 4 (b),
The heating evaporation container 11 is composed of a box-shaped container body 12 formed of a metal such as aluminum or a heat-resistant resin and a lid 13 thereof, and the insecticidal substance 3 is housed in the container body 12. is there. The lid 13 includes an inclined portion 13a inclined inward and downward from the upper end of the peripheral wall of the container body 12,
Further, a transpiration port 13b is provided at the center of the inclined portion 13a. The gas impermeable film 1 is provided on the upper surface of the lid 13.
4 is attached, and the insecticide component can be evaporated by peeling off the film 14 at the time of use. The lid 13 may be simply covered on the container body 12, but it is preferable that both are integrally fixed by adhesion or the lid 13 and the container body 12 are integrally molded.

In using the heating evaporation container 11, a heating device 21 for heating the insecticidal drug substance 3 as shown in FIGS. 5 and 6 can be used. The heating device 21 includes a recess 25 for removably accommodating the heating evaporation container 11, a heater 22 provided on the bottom surface of the recess 25 for heating the heating evaporation container 11, and an electric power supplied to the heater 22. It is a box provided with a plug 23 for supplying. The heating device 21 has an insertion plug 23.
A window 24 for confirming the liquid volume of the insecticidal drug substance 3 is provided on the surface opposite to the surface on which is attached. Therefore, the remaining amount of the insecticidal solid 3 can be easily confirmed through the window 24. Therefore, when the heating device 21 is used, the heating evaporation container 11 is preferably formed of a transparent or translucent heat resistant resin or the like.

At the time of heat evaporation, the insecticidal ingredient 3 is heated by the heat from the heater 22 with the heating evaporation container 11 housed in the heating device 21, and the insecticide component evaporates through the evaporation port 13b. When all the insecticidal drug substance 3 in the heating evaporation container 11 has evaporated, the heating evaporation container 11 should be taken out of the heating device 21 and replaced with a new heating evaporation container 11 into which the insecticidal drug substance 3 has been injected. You can Also,
The insecticidal drug substance 3 may be newly injected into the heating evaporation container 11 in which all the insecticidal drug substance 3 has evaporated.

The heating device 21 may be provided with an openable or detachable lid (not shown) that closes the upper surface of the heating evaporation container 11 when not in use. The planar shape of the heating evaporation container 11 and the heating device 21 may be polygonal or circular other than square.

The heating evaporation container is shown in FIGS. 4 (a) and 4 (b).
In addition to the box-shaped container body 12 and the lid 13 as shown in FIG. 7, for example, the containers 31 and 3 shown in FIGS.
2 can be used as long as it has evaporation ports 33, 34 on the upper part of the container and can open the liquid surface of the insecticidal substance into the evaporation space. These containers 31, 32
The planar shape of can be a square, a polygon other than a square, a circle, and the like, and is not particularly limited.

The heat evaporation method of the present invention comprises various pests required to be controlled, for example, sanitary pests such as cockroaches, flies, mosquitoes, midges, flies, fleas, bed bugs, blood-sucking pests, clothing pests such as squid and carp. Konosutomodoki,
It can be applied to the control of stored grain pests such as weevil, mites such as house dust mites, ticks, and mites, ants, termites and slugs. Therefore, the heat evaporation method of the present invention can be used in various places, for example, a living room, kitchen, dining room in a home; a livestock barn, a kennel, an agricultural and horticultural house; a storage room for clothes such as closets and chests, and food storage. It can be suitably used in a warehouse or the like.

In the above description, the case where the insecticidal drug substance or the added insecticidal drug substance is heated and evaporated is described. However, when the insecticidal drug substance or the added insecticidal drug substance is volatile at room temperature, the insecticidal drug substance is added. The drug substance or the added insecticidal drug substance (for example, the compound A, the compound B, etc.) may be heated at room temperature without being heated, and may be evaporated at room temperature.

[0042]

EXAMPLES The heating evaporation method of the present invention will be described below with reference to examples, but the present invention is not limited to the following examples.

Example 1 1. Insecticidal substance An added insecticidal substance having the composition shown in Table 1 was used. This added insecticidal drug substance is prepared by adding the following additives to the insecticidal drug substance transfluthrin. Dye: Plast Blue 8540 (Arimoto Chemical Co., Ltd.)
Antioxidant M: Irganox 1010 (tetrakis [methylene 3- (3,5-di-t-butyl-4-, manufactured by Ciba)
Trade name of hydroxyphenyl) propionate] methane) Antioxidant N: 3,5-di-t-butyl-4-hydroxytoluene (BHT)

[Table 1]

2. Heating evaporation container A heating evaporation container 5 as shown in FIG. 2 was used. The heat-resistant sheet 1 (container body) has a concave portion 2 and a length of 35 mm
An aluminum plate having a width of 30 mm and a thickness of 0.15 mm (the size of the recess 2 is 30 mm in length, a width of 18 mm, and the depth of the recess 2 is shown in Table 2) is used.
After sealing with, the insecticidal drug substance (hereinafter referred to as the content liquid) was injected into the container using a syringe, and the injection portion was closed with an adhesive. The injection amount was 30 for sample Nos. 5 and 9 shown in Table 2.
The amount was 0 mg, and the other values were 1200 mg. The aluminum plate used was a 50 μm-thick (unstretched) polypropylene film (CPP) as a sealant layer for improving the adhesion and liquid-tightness with the gas permeable film 4 on the surface of an Al sheet having a thickness of 100 μm. ) Coating,
The back surface is thinly coated with a biaxially oriented polypropylene varnish.

[Table 2] The gas permeable film used is as follows. (i) OPP20 / PE30: a gas permeable film obtained by laminating a 20 μm thick biaxially stretched polypropylene film (OPP) and a 30 μm thick polyethylene film (PE). (ii) Peleca: a 30 μm thick (non-stretched). ) A gas permeable film obtained by bonding a polypropylene film (CPP) and a microporous polyethylene terephthalate film (PET) having a thickness of 12 μm (iii) retort CPP30: a thickness of 30 μm (unstretched)
Heat resistant polypropylene film (CPP)

3. Test method Using a mat-type electric mosquito trap with the heater temperature (surface temperature of the heat sink 7) set at 95 ° C., 50 ° with respect to the horizontal plane.
The bottom of the heating evaporation container 5 was entirely heated in the inclined state to evaporate the drug. The insecticide component volatilized from the heating evaporation container 5 was collected by suction on a silica gel column, this silica gel was extracted with chloroform, concentrated and then quantified by a gas chromatograph to obtain the volatilization amount at predetermined time intervals.

4. Test results 68 to 72 hours after the start of energization of the heater and 19
Table 3 shows the amount of volatilization from 2 to 198 hours.

[Table 3] Table 4 shows the volatilization amount of Samples 5 and 9 at 12 to 18 hours.

[Table 4] From Tables 3 and 4, it can be seen that in the heat evaporation method of the present invention using the insecticidal drug substance, the insecticide component is stably vaporized.

Example 2 (Relationship between energization time and volatility) The insecticidal substance was volatilized under the following conditions, and the volatilization amount was determined in the same manner as in Example 1. In the following description, for example, "intermittent 12-hour energization"
Means that the energization for 12 hours and the non-energization for 12 hours are alternately repeated.

[I] Use period 30 days (1) Test conditions a. Content liquid: Ab of Table 1 b. Heating evaporation container: Sample No. of Table 2 Use same container as 1 c. Gas permeable film: OPP20 / PE30
(Above) d. Injection volume: 300 mg e. Heater set temperature: 85 ° C f. Number of samples: 3 g. Volatilization amount measurement time: As shown in each table in (2) below

(2) Test result

[Table 5]

[Table 6]

[Table 7]

[Table 8]

[II] Use period 60 days (1) Test conditions a. Content liquid: Ab of Table 1 b. Heating evaporation container: Sample No. of Table 2 Use same container as 1 c. Gas permeable film: OPP20 / PE30
(Above) d. Injection volume: 600 mg e. Heater set temperature: 85 ° C f. Number of samples: 3 g. Volatilization amount measurement time: As shown in each table in (2) below

(2) Test result

[Table 9]

[Table 10]

[Table 11]

[Table 12]

[III] Use period for 120 days (1) Test conditions a. Content liquid: Ab of Table 1 b. Heating evaporation container: Sample No. of Table 2 Use same container as 1 c. Gas permeable film: OPP20 / PE30
(Above) d. Injection volume: 1200 mg e. Heater set temperature: 85 ° C f. Number of samples: 3 g. Volatilization amount measurement time: As shown in the table in (2) below

(2) Test result

[Table 13]

From Tables 5 to 13, it can be seen that in the heat evaporation method of the present invention using the insecticidal substance, the insecticide component is stably evaporated regardless of intermittent volatilization or continuous volatilization. Further, from Tables 9 to 13, it can be seen that the method of the present invention stably vaporizes the insecticide component even when it is vaporized for a long time of 360 hours or more.

Example 3 (Influence on Volatility of Gas Permeable Film) The volatility of the case where the gas permeable film 4 was attached to the heating evaporation container 35 shown in FIG. In order to compare the volatility of the gas permeable film 4 and the content liquid 3 in contact with each other, volatilization of the insecticidal substance was performed under the following conditions, and Example 1 was performed. The amount of volatilization was obtained in the same manner as in.

(1) Test conditions a. Content liquid: Ab of Table 1 b. Heating evaporation container: The heating evaporation container 35 shown in FIGS. 8 (a) and 8 (b) was used. This is shown in (a) and (b) of the same figure.
The shape is as shown in, and the size is 33 mm long × 25 m wide.
m, the recess 36 is 26 mm in length × 17 mm in width × 3 mm in depth. Others are the same as the container used in Example 1. c. Gas permeable film Thickness and material of gas permeable film: Thickness 50μ
m (unstretched) polypropylene film d. Injection Volume: As shown in Table 14, e. Heater set temperature: 104 ° C. At this time, the surface temperature of the gas permeable film and the temperature of the content liquid are as shown in Table 14. Here, the surface temperature of the gas permeable film was measured near the center of the upper surface of the film, and the temperature of the content liquid was measured near the center of the content liquid. f. Number of samples: 3 g for each sample. Volatilization amount measurement time: 6 to 12 hours after the start of energization of the heater h. How to place the heating evaporation container when heating: Place horizontally and heat

(2) Test result

[Table 14]

From Table 14, as compared with the sample No. 14 in which the film 4 and the content liquid 3 are not in contact, the sample No. 13 and the film 4 in which the film 4 and the content liquid 3 are in contact with each other.
It can be seen that Sample No. 15 to which is not attached has a large amount of volatilization.

Example 4 (Volatility of Various Insecticides) In order to compare the volatility of three types of insecticidal substances, the insecticidal substances were volatilized under the following conditions, and the same procedure as in Example 1 was performed. The amount of volatilization was calculated.

(1) Test conditions a. Content liquid: As shown in Table 15, b. Heat evaporation container: Use the same container as in Example 3 c. Gas permeable film: Each sample has a thickness of 50μ
m (unstretched) polypropylene film is used. Figure 3
As shown in (a), the test was conducted with the gas permeable film 4 and the content liquid 3 in contact with each other. d. Injection volume: 1700 mg e. Heater set temperature: 104 ° C f. Number of samples: 3 g for each sample. Volatilization amount measurement time: 12 to 24 hours after the start of energization of the heater h. How to place the heating evaporation container when heating: Place horizontally and heat

(2) Test result

[Table 15]

From Table 15, it can be seen that the insecticidal ingredient is stable and volatilized in each of the insecticidal drug substances in Sample Nos. 16-18.

Example 5 (Study of gas permeable film) 1. Gas permeable film As shown in Table 16, a composite film prepared by laminating two or three kinds of films was prepared. Where LLDP
E, LDPE or CPP is directly attached as a sealant layer to a heating evaporation container. Sample No. No. 22 “LLDPE / Perforated PET / LLDPE” indicates that they were laminated and adhered in this order. The same applies to 23. The porosity in Table 16 indicates the ratio of the total area of fine holes formed by laser light to the PET film to the total area of the film.

[Table 16] (i) LLDPE: linear low-density polyethylene (ii) CPP: unstretched polypropylene (iii) OPP: biaxially oriented polypropylene (iv) PET: polyethylene terephthalate

2. Heating evaporation container A heating evaporation container 35 as shown in FIG. 8 was used. Heat-resistant sheet 1 (container body) has a concave portion 2 and a length of 42 m
Aluminum plate of m × 38 mm × thickness 0.1 mm (internal thickness 2.9 mm, dimensions of recessed portion: 26 mm length × 17 mm width)
X depth 3 mm) was used. In the recess 2 of this container, 0.0
Transfluthrin added with a dye (Green No. 202) at a concentration of 1% by weight was filled, and the upper surface thereof was covered with the gas permeable film 4 shown in Table 16.

3. Test method Using a heating evaporation container in which the heater temperature (surface temperature of the heat dissipation plate 7) is set to 100 ° C., the entire bottom of the heating evaporation container 35 is heated while being inclined at 50 ° with respect to the horizontal plane. Then, the added insecticidal drug substance was heated for 12 hours, and the volatilization amount of the active ingredient was measured in the same manner as in Example 1. In addition, the change in appearance before and after heat evaporation was visually evaluated. The results are shown in Table 17. In Table 17, “◯” and “Δ” indicate that the film can be used as a gas permeable film.

[Table 17] From Table 17, the material of the gas permeable film is LL.
DPE or CPP is used as a sealant layer, and a film such as OPP, perforated PET or PET is attached to this,
It can be seen that the use of a two-layer or three-layer composite film is less likely to cause swelling or tearing due to heating and crystallization of the insecticide component on the film surface, and is suitable for use in heat evaporation. .

[0066]

INDUSTRIAL APPLICABILITY As described above in detail, according to the method of the present invention for heating and evaporating the insecticidal drug substance or the added insecticidal drug substance, and the heating evaporation container used for this method, the insecticidal liquid to which water is added is used as a liquid absorbent core. Rather than heat evaporation using a heating evaporation method using, it is possible to efficiently volatilize the insecticide component, it is possible to eliminate the problem of the insecticidal solution added water, and there is no need for a solvent at the time of heat evaporation, Therefore, there is no need to distinguish between water-based properties and oil-based properties that occur when a solvent is used, and moreover, there is an effect that a container for heating and evaporating and a heating tool are also compact.

[Brief description of drawings]

FIG. 1 (a) is a plan view showing an example of a heating evaporation container according to the present invention, and FIG. 1 (b) is a sectional view taken along line XX.

FIG. 2 is a cross-sectional view showing a usage state of a heating evaporation container sealed with a gas permeable film.

FIG. 3 (a) is a cross-sectional view showing a state in which a gas-permeable film and an insecticidal substance are in contact with each other, and (b) is a cross-sectional view showing a state in which the gas-permeable film is not attached to the upper surface of the recess. Is.

FIG. 4 (a) is a cross-sectional view showing a heating evaporation container having a structure in which an insecticidal substance does not easily spill, and FIG. 4 (b) is a plan view of the container with the gas impermeable film removed from the upper surface. Is.

FIG. 5 is a cross-sectional view showing a heating device for heating an insecticidal drug substance and a heating evaporation container housed in the heating device.

FIG. 6 is a perspective view showing a heating device for heating an insecticidal drug substance.

7 (a) and 7 (b) are cross-sectional views showing another form of the heating evaporation container.

8A is a plan view showing a heating evaporation container used in Examples 3 and 4, and FIG. 8B is a sectional view taken along line ZZ.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heat-resistant sheet, 2 ... Recessed part, 3 ... Insecticidal substance, 4 ... Gas permeable film, 5 ... Heating evaporation container, 6 ... Heating element, 7 ...
Heat sink

[Procedure amendment]

[Submission date] January 22, 2003 (2003.1.2
2)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

In addition to the above, various kinds of additives such as commonly used potency enhancers, volatilization rate improvers, deodorants and fragrances may be added. Examples of the efficacy enhancer include piperonyl butoxide, N-propylisome,
MGK-264, Cinepyrine 222, Cinepyrine 5
00, Reisen 384, IBTA, S-421 and the like, as a volatilization rate improver, phenethyl isothiocyanate,
Examples include dimethyl hymituxate and the like, examples of the deodorant include lauric acid methacrylate (LMA), and examples of the fragrance include citral and citronellal.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kenji Tasami             3150 Sakakoshi, Ako City, Hyogo Prefecture F term (reference) 2B121 AA12 AA16 CA04 CA16 CA31                       CA36 CA81 CC02 CC31 EA01                       EA02 EA03 EA12 EA13 FA06                       FA08                 4H011 AC02 AC03 AC05 BA01 BB15                       BC08 DA13 DB03 DB04 DD05                       DD06 DE06

Claims (6)

[Claims] 1. An insecticidal drug substance or an added insecticidal drug substance containing an additive thereto is heated to evaporate.
Heat evaporation method for pest control. 2. The heat evaporation method according to claim 1, wherein the insecticidal drug substance or the added insecticidal drug substance is contained in a container, and the container is heated to evaporate the insecticidal drug substance or the added insecticidal drug substance. 3. The heat evaporation method according to claim 1, wherein the insecticidal drug substance or the added insecticidal drug substance is evaporated while the gas permeable film is in contact with the liquid surface of the insecticidal drug substance or the added insecticidal drug substance. . 4. The heat evaporation method according to claim 1, wherein the liquid surface of the insecticidal drug substance or the added insecticidal drug substance is opened in the evaporation space. 5. A container main body containing an insecticidal drug substance or an added insecticidal drug substance containing an additive therein, and a gas permeable film for closing the evaporation port of the container body. A heating evaporation container for use in the heating evaporation method according to any one of Items 1 to 3. 6. A container body containing an insecticidal drug substance or an added insecticidal drug substance containing an additive therein, and a gas-permeable film which comes into contact with the liquid surface of the insecticidal drug substance or the added insecticidal drug substance at least during heat evaporation. A heating evaporation container for use in the heating evaporation method according to any one of claims 1 to 3, further comprising: