JPH0558806A - Heating and transpiring element for suction type heating and transpiring device - Google Patents

Abstract

PURPOSE:To obtain a heating and transpiring element free from crack, damage, bend, etc., of the surface, having excellent strength, dimensional stability and molding properties, remarkable reduced in loss by breakage in production and use and having a definite quality in good productivity. CONSTITUTION:In a heating and transpiring element 8 for a suction type heating and transpiring device in which a drug solution 2 is absorbed by dipping a part of the heating and transpiring body 8 in a drug solution 2 and simultaneously the absorbed drug solution is transpired by heating the upper part 4 of the transpiring body, one or two or more kinds of thermoplastic high polymer powder particles alone or with other organic power and/or inorganic powder and, as necessary, further with a binder are premolded to keep these powder particles in a closely bonded state. Then a part of the surface of the particles is thermally fused with adjacent particles and these fused particles are molded to provide the objective heating and transpiring element 8 having a stable quality capable of effectively transpiring sufficient drug over long time hardly generating clog when used by heating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating vaporizer, more specifically, a chemical liquid absorbed by heating the upper part while absorbing the chemical liquid for the purpose of insecticide, sterilization, deodorization, aroma and the like. The present invention relates to a heating evaporation body used in a wicking type heating evaporation device for evaporating volatiles.

[0002]

2. Description of the Related Art A method in which a part of a heating vaporizer is immersed in an insecticide to absorb the insecticide into the heating vaporizer and to heat the upper part of the insecticide to evaporate the absorbed insecticide. The heat-transpiration insecticidal method has been known for a long time.
For example, Japanese Utility Model Publication No. 43-25081 discloses a method by direct heating. However, in the case of direct heating, the decomposition of the drug is severe, so that the method by indirect heating generally tends to be adopted. As a method of indirect heating, a method of heating by interposing a felt or the like between a heating vaporizer and a heating element is described in Japanese Utility Model Publication No. 36-12459 and Japanese Utility Model Publication No. 46-22585, and heating vaporization is also used. A method of heating a body and a heating element with a certain distance therebetween is disclosed in JP-B-43-26274, JP-B-44-8361, JP-B-45-14913, and JP-B-45-19.
No. 801, JP-B-45-29244, JP-B-61-23163, JP-A-60-161902 and the like. In addition, Japanese Examined Japanese Patent Publication No. 61-2316
No. 3, gazette discloses that allethrin or an isomer thereof is used as an insecticide, and an insecticidal solution prepared by dissolving this in a hydrocarbon solvent having a specific boiling range is used, and as a heating vaporizer, porcelain porous, glass fiber, asbestos. An inorganic fiber selected from gypsum and / or bentonite, and an inorganic powder selected from kaolin, talc, diatomaceous earth, perlite, bentonite, alumina, silica, silica-alumina and titanium, which is hardened with starch. It has been proposed to use a heating vaporizer consisting of

[0003]

In the case of the heating evaporation method using the heating evaporation material described above, since the porous heating evaporation material has been conventionally made of felt, non-woven fabric, asbestos, etc., the liquid absorption rate is relatively high. Fast, as the heating vaporizer is heated, only the solvent in the drug solution evaporates and it becomes difficult for the drug to evaporate sufficiently, and it is contained in the high boiling point substance or solvent produced by thermal decomposition of the drug. It is difficult to maintain stable evaporation over a long period of time because the heating evaporation material is likely to be clogged with the high boiling point substance and the like.

Therefore, in the heating evaporation method by the heating evaporation material heating method, a heating evaporation material formed from an inorganic powder is generally used, and as a method for producing such a heating evaporation material, an inorganic material is used. A method is generally used in which a powder and starch, a semi-synthetic cellulose derivative, a binder such as carboxymethyl cellulose (CMC) are kneaded together with water or hot water and extrusion-molded (see Japanese Patent Publication No. 61-23163). ).

However, by kneading these various materials,
In the method of extrusion molding, in order to stabilize the quality of the heat evaporation material, complicated quality control is required in the manufacturing process. That is, the heating vaporizer obtained by such a method is apt to cause cracks, scratches or bending on the surface of the heating vaporizer during extrusion molding or in the subsequent drying step, and distortion occurs in that portion, causing a break. Since the strength is reduced, the productivity and the commercial property are deteriorated due to the breakage of the heating vaporizer during manufacturing or use. Further, when such a heat-evaporating body is used, temperature unevenness occurs at a portion having scratches, cracks, bending, etc. during heat-evaporating, which causes a serious problem that stable drug evaporation is difficult to obtain. Furthermore, in the drying process, nonuniform shrinkage occurs in the heating vaporizer and its diameter tends to become unstable, and a gap is created in the fitting part between the heating vaporizer and the container, and liquid leakage etc. must be completely avoided. There is also the problem that you can't. In addition, if drying is carried out immediately, a medium crack or a warp of the heating vaporizer will occur inside the heating vaporizer, and a long drying time is required to prevent this, improving productivity. It was difficult to do.

Furthermore, the internal structure of the heat-evaporating body formed by kneading CMC, starch or the like with the inorganic powder as a binder and extruding the binder is such that the inorganic powder is bound by the binder only at the contact surface between the particles, A gap is formed between the binder and the particles, which are pores. A chemical solution is supplied to the pores by a capillary phenomenon to heat and evaporate. When the binder, which is a component forming the pores, is heated for a long period of time in a liquid-wicking state during heating, particularly in the heated portion of the heating vaporizer, the binder deteriorates, which causes the evaporation of the drug. Also, there has been a problem in that thermal decomposition and polymerization of the drug are affected, pores are clogged, and stable drug evaporation cannot be obtained over a long period of time.

On the other hand, in order to improve the strength, it is necessary to increase the amount of the binder, and when the amount of the binder is increased, the gap between particles is clogged with the binder and the porosity is lost.

Further, the binders such as starch and CMC change their solidified state depending on the humidity of the environment. That is,
At high humidity, these water-soluble polymers soften due to the inclusion of water, impairing the strength of the heating vaporizer,
It impaired the dimensional stability of the finished heat vaporizer.

On the other hand, as a molding method which is less likely to cause problems such as turning, there is a heating evaporative body formed by compression molding inorganic powder and / or organic powder together with a binder. It is known that non-uniform transmission of pressure tends to occur as a flow characteristic of the body. Therefore, the structure inside the heating vaporizer tends to be inhomogeneous. In compression molding, capping, sticking, and lamination are generally used in the molding process.
ation), Die fraction
ion) etc., peeling and scratches on the surface and surface layer of the compression molded product,
Phenomena such as cracking and chipping are likely to occur. Due to these problems, it is not possible to produce a heat-evaporated body of stable quality with high production efficiency even by compression molding.

Therefore, the object of the present invention is to solve the above problems, to prevent surface cracks, scratches, bends, etc., to have excellent strength, dimensional stability and moldability, and to prevent damage during manufacture or use. It is intended to provide a heat-evaporated body of a constant quality in which the loss due to is reduced as much as possible with high productivity. Another object of the present invention is to provide a heat-evaporated body of stable quality, which hardly causes clogging during heating and can effectively evaporate a sufficient drug over a long period of time.

[0011]

The heating vaporizer of the present invention comprises:
A heating vaporizer used in a heating vaporization method in which a part of a heating vaporizer is immersed in a chemical liquid to absorb the chemical liquid into the vaporizer, and by heating the upper portion of the vaporizer to vaporize the absorbed chemical liquid , The thermoplastic polymer resin powder alone or in combination with other organic powder and / or inorganic powder, or optionally with other additives, and temporarily molding the heat-evaporating body by a method such as extrusion molding or compression molding. The present invention is characterized in that at that time or after that, only the thermoplastic resin powder is surface-fused and molded in the vicinity of the melting point of the thermoplastic resin powder.

[0012]

[Working] The heating vaporizer of the present invention is prepared by heating a thermoplastic polymer resin powder alone or in combination with other organic powders and / or inorganic powders or other additives, and heating it by a method such as extrusion molding or compression molding. The vaporization body is temporarily molded, and at the time or after that, the surface fusion is performed near the melting point of the thermoplastic resin powder. Thermoplastic polymer resin powder has excellent fluidity because of its low dynamic friction coefficient as flow characteristics of the powder, which improves moldability during extrusion molding and also reduces friction with the die wall during compression molding. It is possible to reduce the pressure drop and improve the uniformity of pressure transmission, and since the thermoplastic polymer resin powder has excellent lubricity and lubricity, it is possible to combine it with the above-mentioned good fluidity during molding. Generated scratches, cracks, chips on the surface and surface of the heat vaporization body,
It is possible to form a heat-evaporated body with improved peeling and stable dimensions. That is, during or after compression molding, by heating near the melting point of the target thermoplastic resin,
Since the surface can be fused, the product can be manufactured without losing the porosity. Also in the case of the extrusion molding method, the addition amount of the binder as a molding aid is reduced to an extent such that it can be preliminarily molded, and the resin powder is heated near the melting point of the thermoplastic resin powder used after drying. Since a part of the surface can be heat fusion-molded with the adjacent particles, it can be commercialized without losing the porosity. Also, in the case of extrusion molding without adding a binder, it is possible to heat the particles near the melting point of the thermoplastic polymer resin powder and bring the particles into close contact with each other by the extrusion pressure at the time of molding to fuse them only at their contact surfaces.

In the internal structure of the heat evaporative body of the present invention, the powder particles adhere to each other, and the pores are formed by the gaps between the particles. By heating this, the close particles partially fuse the surface at the contact points. , Continuous pores are formed. The pore size formed by such a method tends to be influenced by the shape of the particles, the particle size and the particle size distribution. When the particles have a spherical shape or a shape close thereto, the pores formed are determined by the particle size of the particles. When the particle size is large, the pores formed are naturally large. Further, if the width of the particle size distribution is wide, the width of the pore distribution formed is also wide. When the particle size is small and the width of the particle size distribution is small, the pores are small and the width of the pore distribution is narrow. If the pores of the heating vaporizer are large, the capillary phenomenon is not smoothly performed, and not only the chemicals cannot be vaporized sufficiently, but also liquid leakage is likely to occur. In addition, when the pore size is small, the chemical solution is likely to be clogged when used under heating, which causes vaporization failure. Therefore, by classifying the particles and using a powder having a uniform particle size distribution, it is possible to form a heat evaporative body having a relatively uniform pore distribution.

Since the heating vaporizer of the present invention has a narrow pore distribution, the chemical solution can be constantly supplied, and stable evaporation can be obtained. If the pore distribution of the heating vaporizer is wide, uneven supply of the chemical liquid occurs inside the heating vaporizer. In particular, in the heated portion, due to the uneven supply, there will be a part that easily evaporates and a part that hardly evaporates.
Therefore, since the evaporation of the part that easily evaporates is promoted, the balance between the evaporation of the solvent and the drug in the liquid medicine becomes unbalanced, and the evaporation rate of the solvent increases, which causes excessive accumulation of the drug, which causes resinization of the drug. By extension, in long-term use,
It causes clogging and causes poor evaporation.

In the present invention, since the thermoplastic polymer resin powder having good heat resistance and chemical resistance is used, the physical properties thereof do not change during use under heating.
As described above, there is no deterioration of the heating evaporative body and it is possible to improve scratches, chips, cracks, etc. on the surface of the heating evaporative body, so that the surface of the heating evaporative body can be heated uniformly, resulting in uneven temperature. Without doing so, an appropriate porosity and pore distribution can be obtained, so that stable evaporation can be obtained during long-term heating and use. In particular, it is possible to prepare a heat-evaporated body having a pore size distribution of an arbitrary diameter, use a large amount of a thermoplastic polymer resin stable to a drug, and use a binder that does not adversely affect the drug. Since it is used or used only in a small amount, stable transpiration can be obtained even when a high-concentration drug is used. Then, with the minimum necessary solvent capable of supplying the drug to the heating vaporizer, heating evaporation can be performed for a long time without clogging of the heating vaporizer, and the chemical solution container can be downsized. Further, it becomes possible to carry the drug on the heating vaporizer without using a solvent and omit the drug solution container.

By using the method for forming a heating evaporation material of the present invention, it becomes possible to arbitrarily adjust the pores of the heating evaporation material. That is, as described above, the powder used in the heating and evaporating substance of the present invention, the pores formed in the case of a spherical shape or a shape close to it, tends to be determined by the particle size and particle size distribution of the powder, By these adjustments, it is possible to adjust the heating vaporizer having an arbitrary pore diameter and pore distribution, and thus it is possible to adjust the volatilization amount.

Further, since the contact portion of the thermoplastic polymer resin powder is fused in a state in which it is in close contact, the bending strength can be improved without losing the porosity. Further, since the thermoplastic resin powder is excellent in water resistance and moisture resistance, it does not exhibit strength deterioration even in high humidity, so that it can be heated with a stable quality to maintain a certain strength even in an environment of general use. It is possible to form a vaporizer. Further, it becomes possible to evaporate water-soluble or emulsified drug solutions such as deodorants, antibacterial and antifungal agents, insecticides, and fragrances in which the solvent is water. As described above, since it is possible to use a water-based chemical solution, it is possible to avoid the risk of fire during heating and improve safety.

Further, the improvement of the breaking strength is to eliminate the breaking of the heating vaporizer at the time of fitting the heating vaporizer with the inner stopper and the container,
It is possible to further improve productivity. Further, during actual use, breakage due to dropping of the bottle, mounting of a device, misuse, or the like is reduced, which leads to improvement in commercialability. Further, in the manufacturing process by extrusion compression molding of the heating vaporizer, a long drying process is not required.
Even in the extrusion molding method in which the binder is added, the addition amount of the binder is small, so that the production can be performed in a drying step in a short time, and the production capacity of the heat evaporation material can be improved. Since the heating vaporizer of the present invention has good dimensional stability, it is possible to reduce liquid leakage during use. That is, the liquid leakage at the time of use can be divided into one due to the flow of the liquid inside the heating vaporizer and one due to the gap between the heating vaporizer and the container, but the heating vaporizer with good dimensional stability is:
Since tight fitting with a small gap between the container and the container is possible, liquid leakage can be reduced. In addition, if such tight fitting becomes possible, a great amount of force is required when trying to pull out the heating vaporizer from the bottle, and the heating vaporizer cannot be easily disengaged from the bottle. Liquid spills can be prevented, and stable mating that infants cannot pull out is possible.
Child proof property can also be imparted. Then, if necessary, the surface and the surface layer portion of the heating evaporative body are subjected to grinding and / or polishing, whereby further improvement in dimensional stability of the heating evaporative body can be expected.

Further, if necessary, the heating vaporizer and the bottle or the inner plug are partially fused, whereby the adhesion can be improved and the fitting force can be further strengthened. That is, the heat evaporative body of the present invention contains a thermoplastic polymer resin, and since the bottle and the inner plug are also generally made of a polymer resin, they can be fused. From the above effects, it is possible to further improve the prevention of liquid leakage and dropout, and further improve the child proof property. Then, as a method of fusion bonding, a method such as partial heating of the fitting portion at the time of fitting the heating vaporizer and the inner stopper and the bottle and / or fusion by ultrasonic irradiation can be considered.

If necessary, the chemical liquid immersion portion of the heating vaporizer is replaced with another member, whereby the productivity of the heating vaporizer can be further improved. The chemical solution immersion member used here may be a member having oil absorbency such as a porous shape, a fibrous shape, a pipe shape, or a grated shape. Examples of the material include polymer resin, felt, non-woven fabric, paper and the like. In particular, when a polymer resin is used, a method such as heat fusion or ultrasonic fusion can be used for fitting the heated member of the heating vaporizer and the chemical liquid immersion member, which is preferable. Regarding the shape of the heat-evaporated body, for example, in the compression molding method, any shape can be molded by selecting a molding die as needed.
Specific examples thereof include those exemplified in Japanese Patent Application No. 3-20507.

Examples of the thermoplastic resin powder used in the present invention include fluororesins such as PTFE (tetrafluoroethylene) and PVdF (vinylidene fluoride), polyacetal, polyarylate, polyether ether ketone, polyethylene, polyethylene terephthalate, polycarbonate. Polyamides such as Nylon 6, Nylon 66, Nylon 11, Nylon 12, Aromatic Nylon and their copolymers, Polyimides, Polyamideimides, Polysulfone-based resins such as Polysulfone and Polyethersulfone, Polyphenylene ether, Polyphenylene sulfide, Poly Butylene terephthalate, polypropylene, polymethylpentene,
AES resin, AS resin, ABS resin, MBS resin and the like can be exemplified, but fluorine resin, polyamide, polyphenylene sulfide and the like are preferable in terms of heat resistance and chemical resistance,
Furthermore, it is selected according to the chemical solution used and the temperature used. The particle shape of the powder is preferably, but not limited to, a spherical shape or a shape close thereto in view of extrusion moldability, compression moldability and pore forming property. The temperature at the time of surface fusion varies depending on the type of the thermoplastic polymer resin powder used, and it is preferable to heat it near the melting point thereof. It is also possible to use two or more kinds of thermoplastic polymer resin powders having different melting points. In this case, it is preferable to fuse the surface with resin powder having a low melting point.

As these heating methods, electric heating, infrared heating, friction heating such as ultrasonic welding and vibration welding can be used. The particle size is preferably 300 μm or less, preferably about 1 μm to 100 μm from the viewpoint of pore forming property, but is not particularly limited. In addition, in order to improve the binding property, the shaping property, and the wicking property of the chemical liquid during compression molding, calcium hydrogen phosphate, calcium phosphate, magnesium aluminometasilicate, hydrotalside, aluminum hydroxide gel, alumina hydroxide magnesium. , Calcium carbonate, aluminum silicate, magnesium silicate, silicic acid anhydride, clay, diatomaceous earth, kaolin, colloidal silica, water glass, aluminum phosphate, magnesium phosphate, gypsum, inorganic powders such as magnesia cement, and crystalline cellulose, CMC, MC, starch, HPMC, H
It is also possible to add an organic powder such as PC or HPS.

In order to further improve the fluidity, lubricity and lubricity of the powder during compression molding and extrusion molding, as a lubricant lubricant, if necessary, within the range that does not impair the properties of the heat evaporation material. , Talc, stearates such as magnesium stearate, sodium stearate, N-lauryl-DL-
It is also possible to add aminonic acid-based lubricants such as aspartic acid-β-lauryl ester and N ^ε -lauroyl-L-lysine, and waxes such as boric acid, liquid paraffin, sodium benzoate and carbowax. Further, in order to improve the strength and wicking property of the heating vaporizer, glass fiber,
A fibrous powder such as carbon fiber can also be added.
In addition, the heating vaporizer may be optionally mixed with additives such as pigments, dyes, preservatives, antioxidants, ultraviolet absorbers, flame retardants, and accidental food inhibitors as long as the characteristics thereof are not impaired. Good.

In order to minimize heat deterioration of the resin due to friction and heating during molding, surface fusion, grinding, or a manufacturing process such as a cutting process, gentle heating or replacement with an inert gas is performed. Or a method of adding an antioxidant to the powder may be considered. Above all, the method of adding an antioxidant is simple in consideration of manufacturability. As the antioxidant that can be added, one that is not decomposed or volatilized upon heating and is added to an ordinary polymer resin can be used. For example, allyl-β- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, 2,2'-methylene-bis (4-methyl-6-t-butylphenol),
2,2'-methylene-bis (2-methyl-6-t-butylphenol), 4,4'-methylene-bis (2-methyl-6-t-butylphenol), 4,4'-methylene-bis (2 , 6-di-t-butylphenol), 4,
4'-butylidene-bis (3-methyl-6-t-butylphenol), 4,4'-thiobis (3-methyl-6-
t-butylphenol), 1,3,5-trimethyl-
2,4,6-Tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, 1,1,3-tris-
(2-methyl-5-t-butyl-4-hydroxyphenyl) butane, tetrakis [methylene (3,5-di-t-
Butyl-4-hydroxyhydrocinnamate)] methane, 2-mercaptobenzimidazole, 1,1-bis (4-hydroxyphenyl) cyclohexane, phenyl-β-naphthylamine, N, N-diphenyl-p-phenylenediamine, 2, 2,4-trimethyl-1,2-dihydroquinoline polymer, 6-ethoxy-2,2,4-
Trimethyl-1,2-dihydroquinoline, 2-t-butyl-6- (3-t-butyl-2-hydroxy-5-methylbenzyl) -4-methylphenyl acrylate, 3,
5-di-t-butyl 4-hydroxy-benzylphosphonate-diethyl ester, bis (3,5-di-t-
Butyl-4-hydroxybenzylphosphonate ethyl) calcium: polyethylene wax, tris [2-
(3 ', 5'-Di-t-butyl-4'-hydroxyhydro-cinnamoyloxyl) ethyl] isocyanurate, tris- (4-t-butyl-2,6-dimethyl-3
-Hydroxybenzyl) isocyanurate, 3,9-bis [1,1-di-methyl-2- {β- (3-t-butyl-4-hydroxy-5-methyl-phenyl) propionyloxy} ethyl] -2 , 4,8,10-Tetraoxaspiro [5,5] undecane, ditridecyl-3,3 '
-Thiodipropionate, dimyristyl-3,3'-thiodipropionate, distearyl-3,3'-thiodipropionate, triethylene glycol-bis [3-
(3-t-Butyl-5-methyl-4-hydroxyphenyl) propionate], 1,6-hexanediol-bis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], N , N'-hexamethylenebis (3,5-di-t-butyl-4-hydroxy-hydrocinnamamide), 2,2-thio-diethylenebis [3
-(3,5-di-t-butyl-4-hydroxyphenyl) propionate], N, N'-bis [3- (3,5
-Di-t-butyl-4-hydroxyphenyl) propionyl] hydrazine, tris- (3,5-di-t-butyl-4-hydroxybenzyl) -isocyanurate and 2,4-bis- (n-octylthio)- 6- (4-hydroxy-3,5-di-t-butylanilino) -1,3
Examples include compounds such as 5-triazine. These compounds may be used alone or in combination of two or more kinds.

By adding the above-mentioned antioxidant to the powder to form the heating vaporizer, the deterioration of the resin due to heating can be prevented, and the heating vaporizer of more stable quality can be molded.
Further, the antioxidant also exhibits the effect of preventing the deterioration and polymerization of the drug when used under heating, and thus more stable evaporation can be obtained. Similar effects can be expected even when added to the chemical solution.

Further, antioxidants generally called peroxide decomposers, such as dilauryl thiodipropionate (DLTP) and distearyl thiodipropionate (D)
STP) and the like may be used in combination with the antioxidant. Furthermore, by using an ultraviolet absorber as a stabilizer, the light resistance during storage and use can be further improved.

The heating vaporizer of the present invention is microporous, and has a considerably smaller amount of liquid absorption of the chemical solution than the heating vaporizer mainly composed of fibrous material, and therefore, the heating vaporizer used for a long period of time. Suitable as a vaporizer. In addition, JP-A-63
-74440, the porosity in the porous heating vaporization body is 20-50%, preferably 25-4.
By setting it to 5%, it is possible to reduce liquid leakage and further improve stable evaporation of the chemical liquid over a long period of time. That is, as described above, the liquid leakage can be classified into one due to the flow of the liquid inside the heating vaporizer and one due to the gap between the heating vaporizer and the container, but the porosity is 50% or less, preferably 45%. By the following, it is possible to suppress the excessive circulation of the liquid inside the heating vaporizer and reduce the liquid leakage. Further, in order to secure stable evaporation of the drug solution for a long period of time as a heating vaporizer used in the heating vaporizer, a porosity of 20% or more, preferably 25% or more is required.

The heat vaporizer of the present invention is a wicking heat vaporizer for heat vaporizing various insecticides, germicides, deodorants, fragrances and the like for the purpose of insecticidal, sterilizing, deodorizing, aroma and the like. It can be suitably used as a heating vaporizer. An example of an apparatus suitable for using the heating vaporizer of the present invention is shown in FIG. In the figure, reference numeral 1 denotes a container containing a drug solution 2, and the container 1 is housed and held in a housing container 3 in a detachable manner. The upper part of the storage container 3 is open, and an annular (or a pair of semi-annular) heating element 4 is fixed to the open part. 5
Is a cord connected to the heating element 4. Mouth 6 of container 1
A holding member (inner plug) 7 is attached to the inside of the inner stopper 7, and a heating vaporizer 8 is held in the central hole of the inner stopper 7 such that the upper portion thereof is disposed at the center of the annular heating element 4. What is shown is an example of an apparatus suitable for using the heating vaporizer of the present invention, but it is needless to say that the apparatus is not limited to this, and apparatuses of various shapes can be used.

2 and 3 show another embodiment of the heating vaporizer according to the present invention, in which the chemical liquid immersion portion under the heating vaporizer is replaced with another material. In the case of the embodiment shown in FIG. 2, one of the heating vaporizers 9 is fitted with the chemical liquid immersion portion 10 and is fitted into the concave portion of the inner plug 7. In the case of the embodiment shown in FIG. 3, fitting holes are provided at both ends of the heating / evaporating body 11, and the chemical liquid immersion portion 10 is fitted into one of the fitting holes, and fitted into the concave portion of the inner plug 7.

As the chemical solution to be contained in the container 1, insecticides, insect repellents, repellents, fungicides, bactericides, deodorants, fragrances, etc. may be used as active ingredients depending on the purpose. Those dissolved in a group hydrocarbon, alcohol, water or the like are used. When the above-mentioned device is used as a heat-evaporative insecticidal device, the insecticidal liquid is placed in the container 1, the heating element 4 is energized, and the heat-evaporative body 8 is heated, but the surface temperature thereof is appropriately determined according to the type of insecticide. However, it is generally about 50 to 150
It is preferable to set the temperature to ° C. If the heating temperature is too high, there is a problem that the thermal decomposition and polymerization of the drug easily occur and the amount of the transpiration effective component becomes low, and the accumulation of the high boiling point substances generated as a result in the heating transpiration body and clogging due to it This is not preferable because it is likely to occur. As the insecticide, for example, a solution obtained by dissolving various insecticides in an aliphatic hydrocarbon solvent can be used, but the unsaturated aliphatic hydrocarbon alone is not preferable because it has an offensive odor, and the saturated aliphatic hydrocarbon. Is the best. However, the unsaturated aliphatic hydrocarbon may be contained in a quantitative ratio that does not cause the above disadvantage. Examples of commercially available aliphatic saturated hydrocarbon solvents that can be used in the present invention include No. 0 solvent H (manufactured by Nippon Oil Co., Ltd.), No. 0 solvent M (manufactured by Nippon Oil Co., Ltd.), and normal paraffin (Mitsuishi Texaco Chemical Co., Ltd.). IP Solvent 2028 (made by Idemitsu Petrochemical Co., Ltd.) and the like. In addition, water, alcohols, glycol ethers such as ethylene glycol monobutyl ether and glycols, and mixtures thereof can also be used.

As the insecticide used in the present invention, various conventionally used transpiration insecticides can be used, and examples include pyrethroid insecticides, carbamate insecticides, organophosphorus insecticides and the like. it can. Generally, a pyrethroid insecticide is preferably used because it is highly safe, and examples thereof include allethrin, d1 · d-T80-allethrin, d · d-T80-allethrin, d · d-T80-praletrin, phthalthrin, and d-T80-. Various conventionally known pyrethroid insecticides such as resmethrin, d-T80-flamethrin, permethrin, phenothrin, fenvalerate, cypermethrin, cyphenothrin, empentrin, terrarethrin, etofenprox, benfluthrin and the like can be used. The concentration of the effective insecticidal component in the insecticidal liquid may be high, but it is usually used at 10% by weight or less. Taking mosquito killing as an example, d1 · d-T80-
Allethrin (trade name Pinamin Forte: manufactured by Sumitomo Chemical Co., Ltd.) is 1.5 mg / hr or more, dl · d-T-
Allethrin (trade name: manufactured by Bio Allethrin-Russell Euclauf) 1.2 mg / hr or more d · d-T80
-Allethrin (trade name: Exulin: Sumitomo Chemical Co., Ltd.)
The mosquito-killing effect is sufficiently exhibited by a transpiration amount of 0.6 mg / hr or more for d.d.-T80-praletrin (trade name Etoc: manufactured by Sumitomo Chemical Co., Ltd.).

Similarly, when used for the purpose of aroma, various natural and artificial flavors can be used,
For example, natural fragrances of animal or plant origin, hydrocarbons, artificial fragrances such as alcohols, phenols, aldehydes, ketones, lactones, oxides, esters and the like.
The seeds can be used alone, or two or more kinds can be mixed and used. Furthermore, depending on the purpose, deodorant, germicide,
As for various chemicals such as repellents, any chemical that can be evaporated by heating can be used. A masking agent such as a fragrance may be added to the above-mentioned liquid chemical.

[0033]

[Examples] Hereinafter, the present invention will be specifically described with reference to Examples. Examples 1 to 13 The components of the formulations shown in Table 1 below were mixed to prepare Examples 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1.
For 2 and 13, press 100 to 300 cm ²
After compression molding with a press pressure of 10 kg / kg, heating is performed for 10 to 30 minutes under the temperature conditions shown in Table 2 below, and the diameter is 7.0 mm and the length is 7 mm.
A 0 mm sample was prepared. In addition, 10, 11, 12,
For No. 13, antioxidants shown in Table 3 below were added and mixed, and samples were prepared under the same conditions.
-2 group, 11-2 group, 12-2 group,
It was set as 13-2 group. For Examples 6 and 7, samples having a diameter of 7.0 mm and a length of 70 mm were produced by an extrusion molding machine set to the temperature conditions shown in Table 2 below. For Examples 8 and 9, mixing with water, extrusion molding, drying, and then 10 to 10 under the temperature conditions of Table 2 below.
The sample was heated for 30 minutes to prepare a sample having a diameter of 7.0 mm and a length of 70 mm. It should be noted that a mixture obtained by adding and mixing the antioxidants shown in Table 3 below was prepared under the same conditions, and
The group was 9-2.

Comparative Examples 1 to 5 The components of the formulations shown in Table 4 below were mixed with water or hot water, extruded and dried to give a diameter of 7.0 mm and a length of 7.
A 0 mm sample was prepared.

[0035]

[Table 1]

[0036]

[Table 2]

[0037]

[Table 3]

AA: triethylene glycol-bis [3
-(3-t-Butyl-5-methyl-4-hydroxyphenyl) propionate] AB: Stearyl-β- (3,5-di-t-butyl-4)
-Hydroxyphenyl) propionate AC: 2,2'-methylene-bis (4-methyl-6-t
-Butylphenol) AD: 1.3.5-trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl)
Benzene AE: Tetrakis [methylene (3,5-di-t-butyl-4-hydroxyhydrocinnamate)] methane AF: Tris- (3,5-di-t-butyl-4-hydroxybenzyl) -isocyanurate AG : 1,6-hexanediol-bis [3- (3,5
-Di-t-butyl-4-hydroxyphenyl) propionate] AH: N, N'-hexamethylenebis (3,5-di-t
-Butyl-4-hydroxy-hydrocinnamamide)

[0039]

[Table 4]

Test Example 1-1 (Strength-Moisture Resistance) Regarding Samples of Examples 1 to 13 and Comparative Examples 3 to 5 2
4 hours or more 25 ° C 75% R.S. H. And 25 ° C. 90% R.
H. It is left in the environment of 1), each 1 cm from both ends of the heating vaporizer is supported by a flat plate, a round bar with a diameter of 1 cm and a length of 3 cm is arranged so as to be orthogonal to the center of the heating vaporizer, and pressure is applied from the top of the round bar. Measure the strength just before the heating vaporizer breaks,
25 ° C 75% R.S. H. 25 ° C 90% R.S.
H. The intensity ratio (percentage) was calculated. Table of the results
5 shows.

[0041]

[Table 5]

As described above, it is understood that the heating evaporation material obtained by sintering the thermoplastic resin powder as in the example does not show any change in the strength due to the change in the environment and the quality is always stable. ..

Test Example 1-2 (Strength-Water Resistance) Samples of Examples 4, 5, 6, 9, 10, 13 and Comparative Examples 3 to 5 were used for 24 hours or more at 25 ° C. and 75% R.V. H. And allowed to stand in water, and the strength of each was measured by the same method as in Test Example 1-1. H. The ratio of the strength after being left in water to the strength was calculated. Table of the results
6 shows.

[0044]

[Table 6]

The heat-evaporated body obtained by fusion-bonding the thermoplastic polymer resin powder on the surface as in the above-mentioned examples shows almost no strength decrease due to water even if it is left in water, and is less than water-based insecticidal liquid. However, it is possible to secure stable quality.
On the other hand, in the comparative example, the shape cannot be maintained when left in water, and a water-soluble or emulsified aqueous chemical solution such as an insecticide cannot be used. It is also difficult to use solvents such as alcohols, glycols and glycol ethers.

Test Example 2 (transpiration test) Examples 4, 5, 8 to 13 and 8- were applied to the heating vaporizer shown in the drawing.
2 to 13-2 and the heating vaporizers of Comparative Examples 4 to 5 were set. 1) The content liquid in the container is a mixed aliphatic saturated hydrocarbon solution having 14 to 17 carbon atoms containing an insecticide shown in Table 7 for Examples 4, 5, 8 to 13 and Comparative Examples 4 to 5. 80 m
It was carried out in 1 l. 2) Examples 8-2 to 13-2 were also carried out with 100 ml of a mixed aliphatic saturated hydrocarbon solution containing 14 to 17 carbon atoms and containing an insecticide shown in Table 7. The heating element is energized and the upper side surface of the heating vaporizer is heated to 120 ° C.
Then, the amount of transpiration of the insecticide was measured for each heating time. The results are shown in Tables 8-12. The transpiration amount was measured as follows. Evaporation amount: Evaporated vapor was trapped in a silica gel-packed column at regular intervals for a unit time, extracted with acetone, concentrated, and quantitatively analyzed by gas chromatography.

[0047]

[Table 7]

[0048]

[Table 8]

[0049]

[Table 9]

[0050]

[Table 10]

[0051]

[Table 11]

[0052]

[Table 12]

As described above, the heating evaporating body obtained by sintering the thermoplastic polymer resin powder of the present invention has a stable evaporation even when it is heated for 400 hours without adding an antioxidant. was gotten. Furthermore, the heat evaporating body formed by adding the antioxidant was stable and evaporating over a long period of 600 hr.

[0054]

As described above, the heating vaporizer of the present invention is
Since the thermoplastic polymer resin powder is fused on the surface, the following results and advantages can be obtained. B) It is possible to mold a heat-transpiration body with a stable core diameter without scratches or cracks on the surface. B) The heating vaporizer can be molded in a short time, and the productivity can be further improved. C) There is no change in strength due to changes in the environment, and it is possible to always form a heat-transpiration body of stable quality. D) Eliminate the adverse effects of binders when using with heating,
Further, since the pores inside the heating vaporizer are uniform, it is possible to always supply a stable chemical solution, and stable vaporization can be obtained even during heating and use for a long period of time. E) Due to its good water resistance, it is possible to evaporate fragrances, deodorants, antibacterial and antifungal agents, insecticides, and chemicals using water-soluble or emulsified solvents, so the selectivity of the solvent that can be used Can be spread. F) The heating transpiration body and the inner plug can be fused by a method such as heating and irradiating ultrasonic waves to enhance the fitting force, so that the child proof property can be further improved.

[0055]

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a specific example of an apparatus suitable for carrying out a wicking heating evaporation method.

FIG. 2 is a vertical cross-sectional view showing another embodiment of the heating vaporizer of the present invention mounted on a container.

FIG. 3 is a vertical cross-sectional view showing still another embodiment of the heating / evaporating body of the present invention in a state of being attached to a container.

[Explanation of symbols]

1 container, 2 chemical liquid, 4 heating element, 7 holding member (inner plug), 8, 9 and 11 heating vaporizer, 10 chemical liquid immersion member.

Claims (4)

[Claims] 1. A thermoplastic polymer resin powder particle is characterized in that one or a mixture of two or more powder particles is molded by heat-sealing a part of the surface of the powder particle with the powder particles in close contact with each other. Heat vaporizer for wicking type heat vaporizer. 2. One or more kinds of thermoplastic polymer resin powder particles are mixed with an organic powder and / or an inorganic powder, and a part of the surface of the thermoplastic polymer resin powder is adjacent to each other in a state where the powder particles are in close contact with each other. A heating vaporizer for a wicking type heating vaporization device, characterized by being heat-fused with particles and molded. 3. A mixture of one or more types of thermoplastic polymer resin powder particles, an organic powder and / or an inorganic powder and a binder is hydro-kneaded and extruded, dried and temporarily molded, and then this temporarily molded product is heated, A heating vaporizer for a wicking type heating and vaporizing device, characterized in that a part of the surface of a thermoplastic polymer resin powder is heat-fused with adjacent particles to be molded. 4. When a mixture of two or more types of thermoplastic polymer resin powder particles is used, fusion is performed near the melting point of the resin powder having a lower melting point.
A heating vaporizer for a wicking type heating vaporization device according to item 2 or 3.