JPS6115728Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a heating volatilization mat used as an electric mosquito repellent mat, etc. An electric mosquito repellent is a device in which a flat carrier such as a pulp board is impregnated with a pyrethroid insecticidal component, and the carrier is heated to a temperature of 120 to 190°C using an electric heater to volatilize the insecticidal component. In this case, it is important for this insecticidal method to effectively volatilize the insecticidal component at the required concentration over a long period of time (usually 7 hours or more). However, if a carrier such as a pulp board is simply impregnated with insecticidal ingredients and then heated, most of the insecticidal ingredients will volatilize in the initial stage, and the effectiveness will decrease significantly in the latter half of use. There is. Therefore, various sustained release agents (volatilization regulators) have been proposed in order to effectively volatilize the insecticidal component over a long period of time. However, piperonyl butoxide and butyl stearate are actually used as sustained release agents for pyrethroid insecticides, but although these sustained release agents are somewhat effective, A fully satisfactory volatilization control effect cannot always be obtained, and therefore, a more effective method for controlling volatilization of insecticidal components has been desired. Furthermore, the volatilization efficiency of the insecticidal components of conventional electric mosquito repellent mats is not necessarily sufficient, and it has therefore been desired to further improve the volatilization efficiency of the insecticidal components. The present invention was made to improve the above-mentioned situation, and by forming the central part of the upper surface of the heating volatilization mat body to be more raised than both ends, active ingredients such as insecticidal ingredients can be volatilized for a long period of time. It is an object of the present invention to provide a mat for heating and volatilization that can adjust the amount of heat and volatilize the active ingredient effectively and has high volatilization efficiency. Below, various embodiments of the present invention are shown in Figures 1 to 6.
This will be explained with reference to the figures. In the embodiment shown in FIG. 1, the upper surface of the heating volatilization mat main body 1, which is formed as a rectangular plate as a whole, is formed in the vicinity of the center in the length direction, and both ends in the length direction are formed in the center. The mat body 1 is formed so as to be gradually inclined downward from the side toward the end edge, and the thickness near the center in the longitudinal direction of the mat main body 1 is thicker, and the thickness at both end portions is thicker at the end edge. The mat body 1 is formed so as to become gradually thinner toward the mat body 1, so that the vicinity of the central portion in the longitudinal direction of the mat body 1 is bulged. Further, in the embodiment shown in FIG. 2, the mat main body 1 is formed in a flat triangular cross section, and in the embodiment shown in FIG. 3, the upper surface of the mat main body 1 is formed in an arc shape. In all of these examples, the central part of the mat main body 1 in the longitudinal direction is the highest (thickest), and the upper surface gradually slopes downward from this central part toward both end edges in the longitudinal direction, and the thickness increases. It is formed so that it is thin. Furthermore, the embodiment shown in FIG. 4 is an example in which the upper surface of the mat main body 1 is formed flat near the center in the longitudinal direction, and both end portions are formed in a stepped shape. Furthermore, the embodiment shown in FIG. 5 is the embodiment shown in FIG. 2 in which both end edges in the length direction of the top surface are respectively protruded upward, and the embodiment shown in FIG. 6 is the same as the embodiment shown in FIG. This is an example in which grooves 2 are formed along the sides. In each of the above embodiments, the upper surface of the mat main body 1 near the length direction is formed to be raised higher than the both longitudinal ends. It may be formed to be raised higher than the sides. However, it is more effective to form the mat main body 1 by bulging the vicinity of the center in the length direction of the upper surface. Further, the overall shape of the mat main body 1 is not limited to a rectangular plate shape, but can be formed into any suitable shape such as an elliptical plate shape or a regular square plate shape. Furthermore, the mat main body 1 is formed of a valve plate, etc., and is impregnated with an active ingredient such as a pyrethroid insecticide, a sustained release agent (volatization control agent), and other appropriate ingredients depending on the purpose of use. can be done. The mat for heating volatilization according to the present invention is used by heating with an electric heater or the like to volatilize the active ingredients in the same way as conventional mats. The central part of the top surface is raised higher than both ends, so that the active ingredient evaporates stably over a long period of time. The difference in the amount of volatilization in 11 to 12 hours is small, the volatilization efficiency is high, the total amount of volatilization of the active ingredient is large, and the active ingredient acts efficiently. The effect in this respect will be explained in more detail using the following experimental example. [Experiment example] An electric mosquito repellent with the configuration shown in Figure 1 (length:
Make a flat electric mosquito repellent mat (35 mm x 22 mm x 3 mm) with the configuration shown in Figure 7 (35 mm x width 22 mm x thickness (flat central part 3 mm, longitudinal edge 1 mm), I conducted an experiment. Each of these pine trees was impregnated with 101 mg of an insecticidal stock solution having the following formulation. Insecticide stock solution Pinamine Fuorte 50mg Piperonyl butoxide 40mg BHT 10mg Colorant 1mg Place the mat above on a flat heating element of the same size kept at a temperature of 160℃,
The specimen was placed in a glass cylinder with a height of 40 cm and the top was closed with a glass plate, and electricity was applied for a certain period of time to volatilize the insecticidal ingredient (pinamin forte). After cooling, the insecticidal components adhering to the wall surface were collected with acetone and quantified by gas chromatography to determine the amount of volatilization. The results are shown in Tables 1 and 2.

【table】

[Table] As is clear from the results in Tables 1 and 2, the mat of the present invention, which is formed by raising the longitudinal center of the mat body from both ends, lasts for a longer period of time than conventional mats. The insecticidal component volatilizes at almost the same volatilization amount, stable volatilization continues, the total volatilization amount is large, and the insecticidal component is volatilized efficiently and effectively.

[Brief explanation of the drawing]

1 to 6 are perspective views showing one embodiment of the present invention, and FIG. 7 is a perspective view of a conventional electric mosquito repellent. 1...Matsuto body.

Claims (1)

[Scope of utility model registration request] A mat for heating and volatilization, which kills insects such as mosquitoes by volatilizing the active ingredient impregnated into the mat body by heating, characterized in that the vicinity of the center of the top surface of the mat body is formed to be more raised than both ends. Matsuto for heating volatilization.