JP2001245573A - Lid for smoke generation vessel, vessel having the lid, fumigating insecticide using the vessel, and insecticidal method using the insecticide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a smoke-generation device effective for preventing the unintentional contact with a smoking agent composition held in the device, resistant to the escape of the content from the vessel, difficult to take the content out of the device and free from the burning of the lid by the heat generated by the smoking procedure and provide a vessel for the smoke-generation device. SOLUTION: The smoke-generation vessel having a double-wall structure is composed of container for a smoking agent composition encircled with a container for a heat-generation substance generating heat by the contact with water. The heat-generation substance container has a bottom plate having a water-passing opening and the bottom and/or the side wall of the smoking agent container is heated with the hydration reaction heat of the heat- generation substance to generate smoke. The objective lid for the smoking agent container is a metallic lid having a size fittable to the inner wall of the smoking agent container with pressure and provided with protruded claws for caulking and fixing a sealing material to seal the opening of the lid. The present invention also relates to a smoke generation device using the lid, the vessel of the device, an insecticidal method using the device and a fumigating insecticide composed of the device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fumigation composition comprising a heat-vaporizing agent such as an insecticide and a gas generating agent such as nitrocellulose or azodicarbonamide, which generates heat upon contact with water. The gas generating agent is thermally decomposed by heating with the heat of hydration reaction of the exothermic substance, and mosquitoes, fly, cockroach,
Lid for a container for a smoke generating device that exterminates pests such as mites, a smoke generating container using the lid, a smoke generating device including the container, an insecticidal method using the same, and The present invention relates to a smoke insecticide comprising a device.

[0002]

2. Description of the Related Art A smoker composition is prepared by adding calcium oxide,
2. Description of the Related Art A smoker which heats by the heat of hydration reaction of an exothermic substance which generates heat upon contact with water and discharges a thermally volatile chemical as smoke into the atmosphere has been widely used. That is, a smoke generating container containing the smoke agent composition and calcium oxide via a partition is left still in a container filled with a predetermined amount of water at the time of use. After a while, water penetrates into the calcium oxide storage portion of the container, and heat generated by the hydration reaction at this time heats the smoking agent composition to release a heat-volatile chemical such as an insecticide into the atmosphere. To control pests.

[0003] As a cover material of such a smoke generating container,
Heretofore, those obtained by attaching a polyethylene film to paper having holes by heat welding (hot melt) or the like have been widely used. With this type of lid, the polyethylene film melts during smoking and the smoke is released to the outside through the opening.However, since the lid is made of paper, the lid may be torn or peeled by force majeure. Yes, and the lid can be easily peeled off, so that there is a possibility of accidental contact with the stored smoke-containing composition containing insecticide,
In addition, the heat generated during smoking may cause the lid material to be scorched, causing the user to feel uneasy. In addition, the lid material with the synthetic resin film attached to the paper has a different shrinkage ratio due to humidity between the front and the back, so that the lid material curls due to the humidity during the packaging process, and there is no reduction in efficiency during the mounting work. Was not.

Further, Japanese Utility Model Publication No. 57-3275 discloses the use of an aluminum sheet or the like in addition to paper as a cover material, but in the same manner as described above, the aluminum sheet may accidentally come into contact with the smoking agent composition. In terms of fear, there is little difference from paper.

[0005]

DISCLOSURE OF THE INVENTION The present invention is intended to prevent the contents from being accidentally brought into contact with the contained smoke agent composition, to prevent the contents from easily jumping out, and to remove the contents. An object of the present invention is to provide a smoke generating device and a smoke generating container which are configured so as not to be easily taken out and which do not cause burning of the lid due to heat generated during smoking. I do.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a storage portion for a heating substance which generates heat upon contact with water is molded so as to surround a storage portion for a smoker composition, and an opening for water flow is formed in a bottom portion. Smoke in a double-structure smoke generating container having a bottom plate having a bottom portion, wherein the bottom wall and / or the side wall of the smoking agent composition storage portion is heated by the heat of hydration reaction of the exothermic substance to generate smoke. A lid material for the storage portion of the agent composition, which has a size that can be pressed against the inside of the storage portion of the smoking composition, and a sealing material for sealing an opening provided in the lid material. A metal cover material for a smoke generating container characterized by projecting claws capable of being fixed and fixed, a smoke generating device using the lid material, a smoke generating container thereof,
The present invention relates to an insecticidal method using the same and a smoke insecticide comprising the device.

[0007] As the lid material used in the present invention,
The total area of the openings may be at least 6% of the area of the entire lid material (that is, the porosity is 6% or more).
%, More preferably 6 to 30%. If the content is less than 6%, the release of heat-vaporizable agents such as insecticides into the atmosphere is extremely inhibited, and a sufficient insecticidal effect cannot be obtained. Also, as the area of the opening is larger, the strength of the lid material is weakened, and the processing time is required. The opening in the metal plate is usually composed of a plurality of holes, and the shape may be any of a circle, a triangle, a square, a slit, and the like, and may be a shape in which the corners of the triangle and the square are curved. However, in order to prevent the smoke composition from scattering at the time of smoking, and to allow the smoke to squirt smoothly, if the opening is circular, the diameter is 1 to 3 mm.
In the case of a triangle or a quadrangle, it is desirable that the short side is 1 to 3 mm and the long side is 3 to 20 mm. If the hole is too large, there is a risk that the drug may fly out. If the hole is too small, there is a problem that smoke does not come out smoothly.

As the material of the metallic lid material, any of steel plate, tin plate, aluminum plate and the like can be used. Thickness is 0.1 ~
It is preferably about 0.5 mm, and may be appropriately selected in consideration of the strength of the material to be used and the like, ease of mechanical molding, cost, and the like.

The sealing material for sealing the opening provided in the lid material is preferably a material which is melted or incinerated by heat at the start of smoking, and examples thereof include a heat-fusible synthetic resin film. Specific materials of the heat-fusible synthetic resin film, for example, polyethylene, polypropylene, nylon, polyvinyl chloride, polycarbonate,
As a film material such as polyester, in addition to a general-purpose synthetic resin, for example, a foamed resin such as foamed polyethylene, foamed polystyrene, foamed polyurethane and the like can also be mentioned. Among these resin films, a foamed resin film from which a sealing material can be reliably taken out one by one is preferable because it is easy to handle.
The thickness of the film is not particularly limited, but is 0.2 mm or less for a normal film, and 0.5 to 3 m for a foamed resin film.
m is desirable.

In the present invention, the method of caulking and fixing a sealing material to a metal lid material (metal plate) generally includes the following operations. That is, first, a circular metal plate has a plurality of holes (preferably 4 or more, more preferably 6 to 8), which have a plurality of holes provided so as to have an opening ratio of 6% or more. Preferably two or more projections are provided on the back side of the metal plate when drilling holes, preferably in a position closer to the outer circumference than the smoke passage opening, more preferably in a symmetrical position. Drill a small hole to create it (see FIG. 1). Then, the sealing material is placed on the surface on which the protrusion is projected, and is pressed. Then, the projection falls down and is crushed, whereby the sealing material is fixed to the metal plate.

In the present invention, since the sealing material is fixed to the metal plate only by caulking with a press machine, no equipment for heat welding is required, and no operation is required because no adhesive or the like is used. In addition, the manufacturing cost can be reduced. In addition, since the material of the portion directly touched by the smoke is metal, it is possible to provide a lid material that does not cause burning.

FIG. 1 shows an example of the lid material of the present invention. The lid material 11 of the present invention is made of a circular metal plate, and has a plurality of minute circular openings 12, a plurality of claws (projections) 13 for caulking and fixing a sealing material, and a plurality of claws (projections) at the time of molding. A plurality of openings 14 are formed, and ribs 16 for inserting the upper cover by pressure bonding are provided outside the peripheral edge 15.

As a more preferred embodiment of the lid material of the present invention, a lid material is further provided with an upper lid to form a double structure. In order to form a lid material having such a double structure, the lid material of the present invention desirably has a rib for pressing the upper lid on the upper portion thereof. It is preferable that the lid material of the present invention in which the upper lid is crimped and inserted into the inside of the rib is crimp-inserted into the upper part of the smoking agent composition accommodating portion of the smoke generating container and integrated with the container. For this purpose, it is desirable that the rib has a size that can be pressed against the upper part of the smoking agent composition storage portion of the smoke generating container. In addition, even if it is a lid material which does not have an upper lid in the upper part, it is desirable to have a rib for press-fitting and inserting in the upper part of the smoking agent composition storage part of a smoke generating container similarly.

The material of the upper lid is the same as that of the lid material,
Any of steel plate, tin plate, aluminum plate and the like can be used. The thickness is preferably about 0.1 to 0.5 mm similarly to the lid material, and may be appropriately selected in consideration of the strength of the material to be used and the like, ease of mechanical molding, cost, and the like. The material and thickness of the lid material and the upper lid do not necessarily have to be the same. The upper lid may be any as long as it has an opening that can prevent the sealing material from being peeled off during manufacturing or storage, and can release smoke generated at the start of smoking. For that purpose, it is preferable that the opening ratio of the upper lid is larger than that of the lid material. Like the lid, the opening usually has a plurality of holes, and may have any shape such as a circle, a triangle, a square, and a slit. Further, the corner of the triangle or the square may be curved.

The lid member may be fixed to the lid member by any method such as welding, fitting, crimping and the like. However, it is preferable to fix the lid member to the rib provided on the upper portion of the lid member of the present invention by pressing.

FIG. 2 shows an example of the lid member of the present invention. Upper lid 21
Is composed of a circular dish-shaped metal plate, has a plurality of openings 22 and a peripheral edge 23, and is configured such that the peripheral edge 23 is pressed into the inside of the rib 16 of the lid member 11 to be integrated with the lid member. Have been.

FIG. 3 shows a state in which the upper lid 21 is crimped to the lid member 11. In FIG. 3, reference numeral 31 denotes a sealing material.

The shape of the smoke generating container of the present invention is, for example, as shown in FIG. 4. However, any other shape may be used as long as the object of the present invention can be achieved. good. The smoke generating container of the present invention may be molded as three parts: a bottom wall and / or a side wall of the smoke agent composition storage section, a side wall section of the heating substance storage section, and a bottom plate section. However, a container in which the bottom wall and / or side wall portion of the smoker composition storage portion and the side wall portion of the heating substance storage portion are integrally molded is preferable. Fig. 4 shows an example of integral molding
Shown in

The water-absorbing material placed on the metal bottom plate having an opening for water passage provided at the bottom of the heating substance storage portion covers almost the entire bottom plate portion and is located between the two. It is preferable that the device is mounted without any gaps. For this purpose, it is effective to caulk and fix the water-absorbing material to a metal plate such as tinplate, steel plate, aluminum, etc. (In the conventional case, the position of the water-absorbing material is simply set on the bottom plate. It was displaced and rolled up, causing variations in the time to start smoking, and it was difficult to mechanize the packaging process.) The water-absorbing material is preferably a non-woven fabric or filter paper having a high water-absorbing property, such as polyolefin (polyethylene, polypropylene, etc.).
And synthetic fibers such as nylon, polyester, and the like, and nonwoven fabrics and filter papers made of glass fibers and nonwoven fabrics made of synthetic fibers and cotton, rayon, and the like, or cellulose-based filter papers. It has high water absorption and is more durable and preferable than cellulose-based filter paper.

[0020] In the present invention, the method for fixing the water-absorbing material is crimped to a metal plate, mentioned earlier, is almost the same as the method for fixing the sealing member is crimped in the lid,
The following operations are roughly described. That is, first, a circle (preferably 4 or more, more preferably 6 to 8) on the metal circular bottom plate having an opening for water passage, preferably a circle outside the opening for water passage. A small hole is drilled near the circumference, more preferably in a symmetrical position, on the back side of the metal plate when drilling, preferably two or more projections per hole. Then, the water-absorbing material is placed on the surface on which the protrusions are projected, and is pressed. Then, the protrusion falls down and is crushed, whereby the absorbent material is fixed to the metal plate.

The water that has penetrated through the water-absorbing material provided in the water-passing opening provided in the bottom plate of the container firstly undergoes a hydration reaction with a heat-generating substance in contact with the water-absorbing material to generate heat. At that time, the unreacted water rapidly rises to the upper part of the heat generating substance storage portion as water vapor, and a hydration reaction occurs successively to generate heat. The temperature rise varies depending on the position of the bottom wall of the smoke composition storage section, but the distance between the bottom wall of the smoke composition storage section and the bottom plate of the heating substance storage section is preferably 10 to 18 mm. １４14 mm is more preferred. However, the rise in the temperature of the smoker composition storage section is also affected by the properties of the water-absorbing material fixed on the bottom plate of the heat generation substance storage section and the properties of the heat generation substance. The surface temperature of the container may be measured, and an appropriate distance may be determined accordingly.

Calcium oxide is a typical exothermic substance. Calcium oxide is manufactured by firing in a furnace using limestone that is naturally produced as a raw material.
Depending on the production conditions such as the firing temperature and firing time, as well as the difference in the raw limestone, various physical properties can be obtained, from those with high porosity to those with higher porosity. Speeds also vary greatly. Also, calcium oxide produced under the same conditions has a different hydration reaction rate due to a difference in particle size. What is necessary is just to check the physical properties and select an appropriate one, but as a pyrogen, the purity is high,
Those having a high porosity are preferred. Note that the porosity is a ratio of the volume of a gap contained in a porous substance to the total volume of the substance.

The bottom wall of the container for storing the smoke agent composition of the container and / or
Alternatively, the time required for the surface temperature of the side wall to reach 340 ° C. or more may be at least 40 seconds after the exothermic substance comes into contact with water,
Preferably it is 5 to 40 seconds, more preferably 10 to 30 seconds. If the temperature reaches 340 ° C. or more too quickly, there is a risk that the user may be exposed to smoke, so that there is preferably a time difference of about 5 to 10 seconds. In addition, the surface temperature of the bottom wall and / or the side wall of the smoking agent composition storage portion may be a temperature sufficient to start smoking, and is preferably 340 ° C or more, more preferably 360 ° C or more. . In order to sufficiently smoke, the maximum surface temperature is preferably set to 400 ° C. or more, more preferably 400 to 430 ° C. Since the maximum surface temperature of the bottom wall and / or the side wall of the smoke composition storing section of the conventional smoke generator is 380 ° C. or less, smoking is not always sufficient. Therefore, the present invention is also characterized in that the maximum surface temperature is set to 400 ° C. or higher, preferably 400 to 430 ° C.

The fumigation composition contained in the fumigation composition storage section of the fume generating container of the present invention usually includes an insecticide and a fume generating agent. It is also possible to use drugs intended for odors. As the insecticide in the smoker composition of the present invention, it is intended to control or control not only insecticides but also pests such as insecticides, mites, bactericidal agents and fungicides. Examples include pyrethroid insecticides such as permethrin, phenothrin, pyrethrin, and cyphenothrin, organophosphorus insecticides such as diazinon and DDVP, carbamate insecticides such as methoxadiazon, and fungicides such as triazine. Examples of the smoke generator include azo compounds such as azodicarbonamide. The smoking composition of the present invention may further contain various additives as necessary.

The smoke generating container of the present invention is usually used in an intended use by leaving it in a water storage container having a columnar shape so as to be immersed in water. There is no particular limitation on the water storage container, and any water storage container having a space for accommodating the smoke generating container of the present invention and the bottom portion of the smoke generating container of the present invention designed to be immersed in water can be used. Any shape is acceptable.

[0026]

EXAMPLES Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples. In the examples, comparative examples, and reference examples, all of the smoker compositions prepared according to the following formulation were used. Smoker composition: Measure the following ingredients in a kneader,
After mixing, about 10% by weight of water based on the weight of the powder was added and kneaded. Then, after molding with a granulator, about 70 ° C
Was dried with a hot air dryer to obtain a smoker composition. (Prescription ingredients) Phenothrin 3% by weight, cyphenothrin 1% by weight, methoxadiazon 10% by weight, azodicarbonamide 74% by weight, zinc oxide 1% by weight, hydroxypropylmethylcellulose 4% by weight, flavoring 0.1% by weight,
Further, an appropriate amount of clay was added as an excipient so that the total amount was 100% by weight.

Example 1 12.5 g of the above-mentioned smoke agent composition for 6 to 8 tatami mats was accommodated in the smoke generating apparatus shown in FIG. 4, and the total area of the openings of the lid was the total area of the lid. 6% (opening ratio 6%) was pressed.

Example 2 12.5 g of the above-mentioned smoke agent composition for 6 to 8 tatami mats was accommodated in the smoke generator shown in FIG. 4, and the total area of the openings of the lid was the total area of the lid. Of 11% (opening ratio: 11%).

Example 3 The smoke generating apparatus shown in FIG. 4 accommodates 12.5 g of the above-mentioned smoke agent composition for 6 to 8 tatami mats, and the total area of the opening of the lid is the total area of the lid. Of 30% (opening ratio: 30%).

Comparative Example 1 12.5 g of the above-mentioned smoke agent composition for 6 to 8 tatami mats was accommodated in the smoke generator shown in FIG. 4, and the total area of the openings of the lid was the total area of the lid. Of 5% (opening ratio: 5%).

REFERENCE EXAMPLE 1 12.5 g of the above-mentioned smoke agent composition for 6 to 8 tatami mats was accommodated in the smoke generator shown in FIG. 4 (with no lid material attached).

Test Examples The smoked insecticides of Examples 1, 2, 3 and Comparative Example 1 and Reference Example 1 were smoked, and the amount released into the air relative to the amount of the insecticide contained in the smoker composition. Was measured as a volatilization rate, and a decrease rate of the volatilization rate when the lid materials having different opening ratios were mounted was calculated based on the result of Reference Example 1 in which the lid material was not mounted.
Table 1 summarizes these results.

[0033]

[Table 1]

As is clear from Table 1, when the total area of the openings of the cover material is 6% or more of the total area of the cover material (opening ratio is 6% or more), the degree of decrease in the volatilization rate is small, and excellent. It was found to have an insecticidal effect. From the volatilization rate of the smoker composition, it is sufficient that the porosity is 6% or more. On the other hand, as the area of the opening is larger, the strength of the lid material is weakened, and it takes more time to process. Is 50% or less, preferably 30% or less with respect to the area of the entire lid material, so that the opening ratio of the lid material is 6 to 50%, preferably 6 to 50%.
It is about 30%.

[0035]

According to the present invention, since the cover material of the present invention is fixed to the metal plate only by caulking the seal material with a press machine, it does not require various heat welding equipment and does not use an adhesive or the like. The operation is simple, and the manufacturing cost can be reduced. In addition, since the material of the portion directly touched by the smoke is metal, it is possible to provide a lid material that does not cause burning. Also, by attaching the upper lid to the upper part of the lid material to form a double structure and integrating it, it is possible to make a lid material that does not accidentally peel off the hot-melt synthetic resin film in the packaging process etc. became. Furthermore, the lid material of the present invention obtained by press-fitting the upper lid into a rib provided on the upper portion of the lid material of the present invention is, for example, a type in which a synthetic resin film is sandwiched between paper and aluminum foil. They are cheaper and easier to manufacture. Further, the smoke generating container of the present invention,
A step is provided at the top of the container for storing the smoker composition,
The lid material is held inside the container by press-fitting the lid material into the container, so that the lid material does not come into contact with the smoke material composition stored by mistake and cannot be easily removed. Is now possible. Furthermore, in the packaging process, the number of operation steps is small, no special machinery is required, and the required time is short.

[Brief description of the drawings]

FIG. 1 shows an example of a lid material of the present invention. FIG. 1 (a) is a view from above, and FIG. 1 (b) is a view AA of FIG. 1 (a).
The sectional views are respectively shown.

FIGS. 2A and 2B show an example of the upper lid of the present invention, wherein FIG. 2A is a view from above, and FIG.
The sectional views are respectively shown.

FIG. 3 shows a state in which the upper lid of the present invention is crimped to the lid material of the present invention.

FIG. 4 shows an example of the smoke generating container of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Lid material 12 Lid material opening 13 Nail (projection) on lid material 14 Opening made at the time of nail formation 15 Lid material peripheral edge 16 Rib provided on lid material 21 Upper lid 22 Upper lid opening 23 Upper lid peripheral edge 31 Seal Materials 41 Smoke generating container 42 Storage section for smoking composition 43 Storage section for heating substance 44 Bottom plate of storage section for heating substance 45 Absorbent material 46 Bottom wall of storage section for smoking composition

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Eriko Ogasawara 3-41-8 Takada, Toshima-ku, Tokyo Inside Chugai Pharmaceutical Co., Ltd. (72) Inventor Eiko Aoki 3-41-8 Takada, Toshima-ku, Tokyo Chugai (72) Inventor Kunio Matsui 1-5-15 Aoyagi, Soka City, Saitama Prefecture

Claims (18)

[Claims] 1. A storage section for a heating substance which generates heat upon contact with water is molded so as to surround a storage section for a smoker composition.
It has a bottom plate having an opening for water flow at the bottom, and has a double structure in which the bottom wall and / or the side wall of the smoke composition storing section is heated by the heat of hydration reaction of the exothermic substance to generate smoke. A cover material for a storage portion of the smoking agent composition of the smoke generating container, which has a size capable of being pressed against the inside of the storage portion of the smoking agent composition, and seals an opening provided in the cover material. A metal cover material for a smoke generating container characterized by projecting claws that can be fixed by caulking a seal material for performing the process. 2. The lid material according to claim 1, wherein the total area of the openings of the lid material is 6% or more of the area of the entire lid material. 3. The lid material according to claim 1, wherein the seal material is fixed by caulking. 4. The lid according to claim 3, wherein the sealing material is a heat-meltable foamed resin film. 5. The lid according to claim 1, wherein the lid has a rib on an upper portion thereof for pressing the upper lid. 6. The lid material according to claim 5, wherein the rib for pressing the upper lid is capable of being pressure-bonded to the upper portion of the smoke composition storing portion of the smoke generating container. 7. The lid material according to claim 5, wherein the upper lid is pressure-bonded inside a rib for pressing the upper lid. 8. The lid material according to claim 7, wherein the upper lid has an opening. 9. A smoke generating container to which the lid material according to claim 1 is pressure-bonded. 10. The container according to claim 9, wherein the housing for the exothermic substance and the housing surrounding the housing for the smoker composition are integrally molded. 11. The bottom plate of the exothermic substance storage portion of the container according to claim 9 or 10, wherein the bottom plate is a water-permeable bottom plate formed by caulking a water-absorbing material to a metal plate having an opening. A container according to claim 1. 12. The smoke generating container according to claim 9, wherein a distance between a bottom wall of the smoking agent composition storage section and a bottom plate of the heating substance storage section is 10 to 18 mm. 13. The smoke generating composition according to claim 9, wherein the smoke generating composition is stored in the storing section of the smoke generating composition, and the heat generating substance is stored in the storing section of the heat generating substance. Smoke generator. 14. The smoke generating apparatus according to claim 13, wherein the exothermic substance is calcium oxide. 15. The smoke generating apparatus according to claim 13, wherein the smoker composition containing the insecticide is housed in the smoker composition housing section. 16. A smoke insecticide comprising the smoke generator according to claim 15. 17. A method for killing insects, comprising immersing the bottom of the smoke insecticide according to claim 16 in water to generate smoke. 18. The insect killing method according to claim 17, wherein the bottom of the smoke generator is immersed in water and smoke is generated at least 40 seconds later.