JPH1084835A - Insecticide container - Google Patents

Abstract

(57) [Summary] [Object] To provide a pesticide container that does not leak medicine from the lower part of the pesticide container and has little danger to the human body. SOLUTION: The lower part of the container has a hole into which water enters into the container in order to react with the medicine, and the upper part of the container has a hole through which gas having insecticidal performance generated by reaction between the medicine and water goes out of the container. An insecticide container having an insecticide container, wherein the lower hole of the container is sealed with a film made of a water-soluble polymer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insecticide container which can be safely handled without leakage of the drug from the container, without adverse effects on the human body.

[0002]

2. Description of the Related Art A reactive insecticide consisting of a container filled with water and a metal container filled with a chemical which reacts with water to generate heat and vaporize and diffuse medicinal ingredients, removes cockroaches and mites in the house. Have been used to However, currently sold insecticides are equipped with a nonwoven fabric so that the drug does not leak from the lower part of the metal container filled with the drug, and a part of the drug from the lower part of the container during transportation and handling, In particular, fine powder may leak. The drug has a pesticidal effect, and is dangerous and problematic because it can be attached to human hands or ingested by infants and babies.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pesticide container which eliminates the above drawbacks and which can be safely handled without leaking dangerous drugs during transportation and handling.

[0004]

According to the present invention, there is provided, at the lower part of the container, a hole for allowing water to enter the container to react with the drug, and at the upper part of the container the insecticidal performance generated by the reaction between the drug and water. The container for insecticides which has the hole which the gas which has outside comes out of a container is provided with the container of the lower part of the container sealed with the film which consists of a water-soluble polymer.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The insecticide container of the present invention has a hole (a hole having a diameter of usually 3 to 15 mm, preferably 5 to 10 mm, in which water enters the container in order to react with a drug at the bottom of the container. The number of holes is usually 5 to 20, preferably 7 to 15), and a hole (hole) at the upper part of the container through which a gas having insecticidal performance generated by the reaction between the drug and water flows out of the container. Is usually small enough to allow gas to exit the container, and the number of holes is usually sufficient to allow gas to exit the container). Container.
The container for a pesticide filled with a drug is usually used by immersing about half in water.

[0006] The water-soluble polymer used in the film of the present invention is not particularly limited as long as it is water-soluble, and is preferably heat-meltable. Examples of the water-soluble polymer include synthetic polymers such as polyvinyl alcohol, polycaprolactone, polylactic acid, polyethylene succinate, polybutylene succinate, and polyethylene oxide, polymers using starch compounds, and polymers using natural products such as chitin and chitosan. They can be used, and if they are water-soluble, modified or copolymerized products thereof can also be used. These water-soluble polymers can be used alone or as a blend of two or more.

Among them, polyvinyl alcohol (hereinafter abbreviated as PVA) is well balanced in terms of heat fusibility, water solubility, moldability, film strength and cost. PVA is a polymer obtained by polymerizing or copolymerizing a vinyl ester by a conventional method and then saponifying, and various PVAs can be used. Examples thereof include a saponified product of a polymer of a vinyl ester alone, a saponified product of a polymer obtained by copolymerizing a vinyl ester and various comonomers, and the like. Examples of the comonomer include α-olefins, ω-hydroxy-α-olefins, long-chain vinyl ethers, polyoxyalkylene group-containing unsaturated compounds, saturated branched fatty acid vinyls, and unsaturated sulfonates. Examples of the vinyl ester include vinyl acetate, vinyl propionate, vinyl formate, vinyl versatate, and vinyl pivalate. Vinyl acetate is usually used industrially.

The degree of polymerization of PVA is not particularly limited, but is preferably from 200 to 2,000, more preferably from 250 to 1,000, further preferably from 250 to 7, in terms of viscosity average degree of polymerization.
50. If the viscosity average degree of polymerization is less than 200, the strength of the film becomes insufficient, and the viscosity average degree of polymerization becomes 200.
If it is larger than 0, the melt viscosity increases and the moldability decreases. Although the degree of saponification of PVA is not particularly limited and can be used in a wide range, it is preferably 40 to 100 mol%, more preferably 40 to 80 mol%, in consideration of heat fusibility, film strength and water solubility. More preferably, it is 40 to 70 mol%.

By incorporating a filler into the water-soluble film of the present invention, the dimensional stability of the film can be improved, the rate of water-solubility can be adjusted, the content can be made opaque so that the contents cannot be seen, and blocking can be achieved. Prevention can be exhibited. The amount of the filler added is preferably 300 parts by weight or less, more preferably 100 parts by weight or less, based on 100 parts by weight of the resin. If the amount of the filler exceeds 300 parts by weight, physical properties such as strength and elongation of the film are greatly reduced, and it is difficult to form the film.

Specific examples of the filler include inorganic fillers such as talc, clay, calcium carbonate, silica, mica, alumina, titanium oxide, zirconium oxide, boron nitride, aluminum nitride, glass, and urea-formalin. Organic fillers such as resin and melamine-formalin resin are exemplified. In particular, a plate-like filler such as talc, mica, and plate-like calcium carbonate is preferable in terms of dimensional stability and strength-imparting effect. Various particle diameters of these fillers can be used depending on the purpose of use, but generally those having a particle diameter of 0.1 to 100 μm are used. Especially considering dimensional stability, strength, smoothness of the film surface, 0.5 to
Those having a thickness of 30 μm are preferred.

Further, a plasticizer can be added for lowering the melting point of PVA, which is a raw material of the water-soluble film of the present invention, and for imparting flexibility and strength. Known plasticizers can be used as long as the characteristics of the present invention are not lost. For example, in addition to glycerin, diglycerin, polyethylene glycol, polypropylene glycol, and the like,
Examples include compounds obtained by adding ethylene oxide to a polyhydric alcohol such as sorbitol or glycerin. These plasticizers can be used alone or as a mixture of several types. The amount of the plasticizer is not particularly limited, but is preferably 0 to 100 parts by weight of the plasticizer based on 100 parts by weight of the polymer such as PAV.
More preferably, the amount is 0 to 20 parts by weight.

[0012]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. In the following, “parts” and “%” mean “parts by weight” and “% by weight”, respectively, unless otherwise specified. In the following Examples and Comparative Examples, the state of powder leakage and the state of reaction between water and the drug were measured by the following methods. (1) State of Powder Leakage The container filled with the drug was attached to a shaker that moves up and down at a rate of once / second, and the state of powder leakage after moving up and down for 10 minutes was visually checked. (2) Reaction state between water and drug The lower half of the insecticide container was placed in a container containing water, and the normal state of reaction of the drug in water and the normal state of vaporization of the drug were visually observed.

Example 1 A partially saponified polyvinyl alcohol resin having a viscosity-average degree of polymerization of 500 and a saponification degree of 70 mol% was dried at 50 ° C. for 24 hours, and then pelletized by melt extrusion. (Pelletization conditions) Lab Plast Mill, manufactured by Toyo Seiki Co., Ltd. Biaxial 20 mmφ L / D = 28 Number of rotations 100 rpm Molding temperature 190 ° C. These pellets were formed into a film at 190 ° C. by an extruder equipped with a T-die. Next, the lower part of the container has a hole (15 holes with a diameter of 7 to 8 mm) through which water enters the container to react with the drug, and the insecticide generated by the reaction between the drug and water at the upper part of the container. In the hole at the bottom of the container for insecticides filled with a drug having a hole through which a gas having performance exits the container,
A film obtained by processing the back surface of the film obtained above with a solvent-type acrylic pressure-sensitive adhesive was mounted. The container had no powder leakage and the reaction between water and the drug was good.

Example 2 Evaluation was made in the same manner as in Example 1 except that the back surface of the film was attached to the lower portion of the container by thermocompression bonding without being subjected to adhesive processing. The container had no powder leakage and the reaction between water and the drug was good.

Example 3 Polyvinyl alcohol-based resin 100 used in Example 1
The evaluation was carried out in the same manner as in Example 1 except that 20 parts of talc (trade name: LMS-200, manufactured by Fuji Talc Industry Co., Ltd.) was added to each part during pelletization. The container had no powder leakage and the reaction between water and the drug was good.

Example 4 The same evaluation as in Example 1 was conducted except that 100 parts of PVA and 10 parts of polyethylene glycol were kneaded with a planetary mixer and then dried under reduced pressure. The container had no powder leakage and the reaction between water and the drug was good.

Comparative Example 1 Evaluation was made in the same manner as in Example 1 except that a nonwoven fabric made of polyester fiber was attached to the lower part of the container instead of the water-soluble film formed from PVA. In the container, the reaction between the water and the drug was good, but powder leakage of the drug was confirmed from gaps between the fibers of the nonwoven fabric.

The results of Examples 1 to 4 and Comparative Example 1 are summarized in Table 1.

[0019]

[Table 1]

(Footnotes in Table 1) 1) Powder leakage ○: No powder leakage ×: Powder leakage 2) Reaction between water and drug ○: Good vaporization and diffusion of insecticide components ×: Poor vaporization and diffusion of insecticide components

From Table 1, it can be seen that the insecticide containers of Examples 1 to 4 equipped with a water-soluble film made of a PVA-based resin having both water-solubility and heat-meltability have no chemical powder leakage and vaporize and diffuse insecticide components. It can be seen that the reaction occurs well.

[0022]

According to the present invention, the drug can be safely transported and handled without leaking from the lower part of the insecticide container, and the reactivity between water and the drug is good when used by immersing it in water. That is, the insecticide container of the present invention has no leakage of the drug before use, but when immersed in water at the time of use, the water-soluble film is broken and water can easily enter the container.

Claims (3)

[Claims] 1. A hole at a lower portion of a container for allowing water to enter the container to react with a drug, and a hole at an upper portion of the container to allow gas having insecticidal performance generated by reaction between the drug and water to exit the container. A container for insecticides, comprising: a container at the bottom of which is sealed with a film made of a water-soluble polymer. 2. The insecticide container according to claim 1, wherein the water-soluble polymer is heat-meltable polyvinyl alcohol. 3. The insecticide container according to claim 1, wherein the film is a film obtained by blending an inorganic filler in an amount of 300 parts by weight or less with respect to 100 parts by weight of a water-soluble polymer.