JPH072282A - Spray nozzle for atomizer - Google Patents

Abstract

(57) [Summary] [Instruction] A spray nozzle for a sprayer, in which a baffle member 8 is arranged inside the mass jet nozzle 5, wherein the baffle member 8 is located from a substantially central portion inside the mass jet nozzle 5 to the jet nozzle 5
A plurality of partition plates 8b are arranged radially at equal intervals toward the injection port 5a side. Further, in the spray nozzle for a sprayer in which the baffle member 8 is arranged inside the large-volume injection nozzle 5, the baffle member 8 arranges a plate 8a in the substantially central portion inside the large-volume injection nozzle 5, and the outer periphery of the plate 8a. It is possible to dispose a plurality of partition plates 8b radially from the injection nozzle 5 toward the injection port 5a side at equal intervals. [Effect] The jet liquid can be diffused and stabilized in a proper range in a wide temperature range, and the hit rate against a target pest can be improved.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an aerosol composition for pharmaceuticals, agricultural chemicals, cosmetics, etc., especially insecticides, termites,
The present invention relates to a spray nozzle used for a sprayer of an aerosol composition such as an acaricide.

[0002]

2. Description of the Related Art In this type of injection nozzle, it is desirable that the injection nozzle be spread over as wide a range as possible in order to improve the hit rate against harmful insects. The effect against pests is reduced. For this reason, conventionally, a rapid-acting aerosol was equipped with a large-volume injection nozzle.

[0003]

However, when the amount of liquefied gas is set on the basis of the feeling of use (rough mist) in a certain temperature range, the mass injection nozzle described above has an internal pressure of the aerosol at a low temperature. It will decrease and a sufficient ejection force will not be obtained, or it will become a water gun-like ejection liquid. Further, when the temperature is high, the internal pressure of the aerosol rises, resulting in an atomized jet liquid. Therefore, in any case, there is a problem that a satisfactory state of the jet liquid cannot be obtained.

In view of this, the present invention comprehensively considers the diffusivity, liquid form, reach, and effect of insects on a target pest by diffusing and stabilizing the jet in a suitable range over a wide temperature range. The object of the present invention is to provide an injection nozzle that improves the control rate, the hit rate, and the like.

[0005]

Therefore, the spray nozzle for a sprayer according to the present invention is a spray nozzle for a sprayer in which the baffle member 8 is arranged inside the mass spray nozzle 5, and the baffle member 8 is the mass spray nozzle 5. It is assumed that a plurality of partition plates 8b are radially arranged at equal intervals from the substantially central portion on the inner side toward the injection port 5a side of the injection nozzle 5.

Further, the spray nozzle for a sprayer according to the present invention is a spray nozzle for a sprayer in which a baffle member 8 is arranged inside the mass spray nozzle 5, and the baffle member 8 is a substantially central portion inside the mass spray nozzle 5. The plate 8a is placed on the
It is possible to dispose a plurality of partition plates 8b radially from the outer periphery of a toward the ejection port 5a side of the ejection nozzle 5 at equal intervals.

The plate 8a of the baffle member 8 is preferably circular in shape, and the number of partition plates 8b is preferably three. Further, the diameter of the plate 8a and the width of the partition plate 8b of the baffle member 8 are determined by the mass injection nozzle 5 respectively.
It is preferably about 1/3 of the inner diameter of The length of the partition plate 8b of the baffle member 8 is preferably about 1/2 of the total length of the injection nozzle 5.

[0008]

Since the spray nozzle for a sprayer of the present invention is provided with the above means, the spray liquid can be diffused and stabilized in a proper range in a wide temperature range.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of a spray nozzle for a sprayer according to the present invention will be described in detail below with reference to the drawings showing embodiments.

FIG. 1 shows a sectional view of a main part of a sprayer equipped with a spray nozzle for a sprayer according to the present invention, in which a spray nozzle part 2 is mounted on an upper part of an aerosol can 1 and a large amount is provided on an upper end of the aerosol can 1. It is assumed that the injection mechanism 3 is equipped. The injection nozzle part 2 has an injection nozzle 5 attached to one end of an injection button 4. In the mass injection mechanism 3, the stem 6 is pushed down by the operation of the injection button 4, the valve 7 is opened, and the mass injection is performed.

In the present invention, as the undiluted solution to be put in the aerosol can 1, for example, a pest controlling agent may be used alone or as a mixture, if necessary. Representative agents include O, O-diethyl-O- (5-phenyl-3-isoxazoyl) phosphorothioate,
O, O-dimethyl-O- (3-methyl-4-nitrophenyl) phosphorothioate, O, O-diethyl-S-
(2-ethylthioethyl) phosphorodithioate, O,
O-diethyl-O- [2-chloro-1- (2,4-dichlorophenyl) vinyl] phosphate, O, O-dimethyl-S- (N-methyl-carbamoylmethyl) phosphorodithioate, O, S -Dimethyl-N-acetylphosphoramidothioate, O-ethyl-O-2,
4-dichlorophenylbenzenephosphonothioate, 2-methoxy4H-1,1,3,2-benzooxaphosphorane-2-4one, methyl N-[(methylcarbamoyl) oxy] thioacetimidate, O, O-
Dimethyl-S- [2-methoxy-1,3,4-thiadiazole-5 (4H) -on-4-yl) methyl] dithiophosphate, O, O-diethyl-O- (3,5,6
-Trichloro-2-pyridyl) phosphorothioate, 1,3-bis (carbamoylthio) -2- (N, N
-Dimethylamino) propane hydrochloride, pyridafenthion, permethrin, phenothrin, fenpropatrine, fenvalerate, allethrin, resmethrin, flamethrin, fenitrothion, phthalthrin, carbaryl, insecticides and acaricides such as boxers,
Other insecticides, chlordene, permethrin, hydramethylnon, anticides such as boric acid, 6- (propylpiperonyl) -butyl carbyl ether, N- (2-ethylhexyl) -1-isopropyl-4- Synergists such as methylbicyclo (2,2,2) oct-5-ene-2,3-dicarboximide, isobornylthiocyanoacetate, octachlorodipropyriether (S421), dimethyl phthalate, 2,3 , 4,5-bis - (△ ₂ - butylene) - tetrahydrofuran, 2,3,4,5-bis - (△ ₂ - butylene) - tetrahydrofurfuryl alcohol, N, N-diethyl--m- toluamide ( DE
T), caprylic acid diethylamide, 2,3,4,5-bis- (Δ ₂ -butylene) -tetrahydrofurfural,
Di-m-propyl-isocinchomeronate, secondary butyl styryl ketone, nonyl stilketone, N-propyl acetetoanilide, 2-ethyl-1,3-hexanediol, di-n-butyl succinate, 2- Examples thereof include pest repellents such as butoxyethyl-2-furfuridene acetate, dibutyl phthalate, tetrahydrothiophene, β-naphthol, diallyl disulfide, and bis (dimethylthiocarpamoyl) disulfide.

A solvent can be used to form a solution of the active ingredient of the drug, and examples of the solvent include n-hexane, 2-methylpentane, 3-methylpentane, 2,3-dimethylbutane, and the like. 2,2-dimethylbutane, 3,3,4-trimethylnonane, cyclohexane,
Kerosene, naphtha, petroleum-based solvents such as normal paraffin, isoparaffin, liquid paraffin, chlorinated hydrocarbons such as dichloroethane and trichloroethane, alcohols such as ethyl alcohol, isopropyl alcohol, ethylene glycol, ether derivatives such as diethyl ether, And water.

Further, as the propellant, liquefied gas (chlorinated
Methylene, propane, n-butane, iso-butane, n
-Pentane, iso-pentane, LPG, DME, CO
₂,, dichloromonofluoroethane (HCFC-141
b), 2-trifluoromethyl-3,3,3-triflu
Oropropene, 1,1,1,4,4,4-hexafluor
Lobutane, tetrafluoroethane (HFC134a),
CHCl F₂(HCFC-22), CHCl₂CF₂(H
CFC-123), CHClFCF₃(HCFC-12
4), CH₃ClF₂(HCFC-142b), CHC
l₂CF₂CF ₂(HCFC-225), CHF₂CF
₂(HFC-125), CH₃CF₂(HFC-143
a), CH₃CHF₂(HFC-152a), CH₂F
₂(HFC-32), CF₃CHFCF₂(HFC-2
27) etc., the ozone depletion potential is 0 or near zero.
At least one or more of
Appropriate combination and / or compressed gas with it
(Air, nitrogen gas, carbon dioxide gas, laughter gas, argon gas
Combination), for example, the prescription as shown in Table 1.
The following propellants can be used.

[0014]

[Table 1]

In the present invention, the mixing ratio of the undiluted solution and the propellant varies depending on the types of undiluted solution and liquefied gas.
The ratio of the propellant 95 to 85 to the undiluted solution 5 to 15 is sufficient, and the propellant 280 to 2 to the undiluted solution 10 to 20 is preferable.
It is preferable to mix it in a volume ratio of 90.

Further, the injection nozzle for the atomizer of the present invention is
The propellant is suitable for 75 wt% or more with respect to the entire content of the aerosol can 1.

Further, the valve diameter of the aerosol can 1 can be used in combination with various valve diameters as long as a large amount of spraying is possible, but the housing 7 has a hole diameter of 0.2 to 2.5 mm. Diameter of vapor tap is 0.2 ~ 2.5mm, diameter of stem 6 is 2.0 ~ 5.0m
m, and the injection port diameter of the injection button 4 is preferably arbitrarily selected from the range of 0.25 to 1.8 mm. The vapor tap may be omitted.

In the spray nozzle for a sprayer of the present invention, the baffle member 8 is provided inside the spray nozzle 5 attached to one end of the spray button 4, and when the spray liquid hits the baffle member 8, the liquid is dispersed in the surroundings to form a rough surface. It becomes a mist and is discharged from the ejection port 5a to the outside. At this time, the state of the ejected liquid changes subtly depending on the shape, area and position of the baffle member 8 provided inside the ejection nozzle 5, and the total length and inner diameter of the ejection nozzle 5.

Therefore, in order to optimize the diffusion performance of the spray nozzle for the atomizer, the following evaluation test was conducted. (Structure of the injection nozzle used for the test) The injection nozzle 5 is made of polyethylene with an inner diameter of 3.0 mm and has a total length of 17 mm, and the arrangement of the baffle members 8 inside the injection nozzle 5 is variously changed as shown in Table 3. It was used. As for the shape of the baffle member 8, a circular plate 8a (diameter 1.0 mm) is arranged in the center of the inner side, and the width of 1.0 mm from the outer periphery of the circular plate 8a is directed toward the ejection port 5a side of the ejection nozzle 5. Three partition plates 8b are arranged radially at equal intervals. (Test method) A fast-acting aerosol (formulation: see Table 2) is filled in an aerosol can 1, and a spray button 4 (caliber 0.8 m).
Various jet nozzles 5 (see Table 3) were attached to m), and jetting was performed for 1 second toward a thick paper placed 1 m away from the tip of the jet port 5a, and the following 4 items were examined. The test was conducted at outside air temperatures of 15 ° C, 20 ° C, 25 ° C, 30
It was carried out at a constant temperature of ° C and 35 ° C.

[0020]

[Table 2]

[0021]

[Table 3]

(Test Results) It is understood that the reachability of the jet liquid to the thick paper, the shape of the adhering surface, and the state of the jet liquid are all satisfied. Among them, G-4 to 6 type is preferable (Table 4 to
7), and G-4 type are more preferable.

[0023]

[Table 4]

[0024]

[Table 5]

[0025]

[Table 6]

[0026]

[Table 7]

Next, an evaluation test of the diffusion performance of the G-4 type injection nozzle with respect to changes in the outside air temperature, the injection gas (LPG) and the diameter of the injection button was carried out by the following method. (Test method) Each of three types of samples (prescription: see Table 8) in which the injection gas (LPG) capacity was changed was set to 20
It was allowed to stand at ° C and 30 ° C for about 2 hours. Spray button 4 with four different caliber for these samples
Was attached, and the state of the jet liquid was examined for the presence or absence of the jet nozzle 5. The diffusivity was evaluated in the same manner as in the test example.

[0028]

[Table 8]

(Test Results) When the injection nozzle 5 is not attached, the diameter of the injection button 4 (0.8, 1.2, 1.
(4, 1.8 mm), the state of the jet liquid changed from water gun-like → coarse mist → slightly coarse mist → fine mist. This tendency was more remarkable as the capacity of the LPG increased and the outside air temperature increased.

On the other hand, when the injection nozzle 5 is attached,
A stable and almost ideal injection liquid (coarse mist) regardless of the diameter of the injection button 4, the capacity of the LPG, and the outside air temperature.
And adhesiveness (medium-sized circle) were shown (see Table 9).

[0031]

[Table 9]

Further, an evaluation test of diffusion performance by the G-4 type injection nozzle and the G-4 type modified injection nozzle with respect to changes in the outside air temperature, the injection gas (LPG) and the diameter of the injection button 4 will be described below. It carried out by the method shown. (Test method) The test was performed in the same manner as in the G-4 type injection nozzle.

This G-4 type deformation jet nozzle (G-
4S) is a G-4 type with the tip cut by 5 mm, and the internal resistance of the pipe is removed from the baffle member to the ejection port 5a (see Table 10).

[0034]

[Table 10]

(Test Results) When the G-4S type injection nozzle 5 is attached, the injection liquid is the diameter of the injection button 4 and LPG.
It was observed that the rough mist was maintained irrespective of the change in the capacity and the outside air temperature, the diffusivity was improved compared with the G-4 type injection nozzle 5, and the circular shape of the adhering surface was increased (see Table 11). .

[0036]

[Table 11]

[0037]

EFFECT OF THE INVENTION Since the spray nozzle for a sprayer of the present invention is constructed as described above, the spray liquid is diffused and stabilized in a proper range in a wide temperature range, and the hit rate against the target pests, etc. Can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a sprayer equipped with a spray nozzle for a sprayer according to the present invention.

FIG. 2 is a perspective view of a baffle member of the spray nozzle for a sprayer according to the present invention.

[Explanation of symbols]

 4 jet button 5 jet nozzle 5a jet outlet 8 baffle member 8a plate 8b partition plate

Claims (6)

[Claims] 1. A spray nozzle for a sprayer, wherein a baffle member (8) is arranged inside a large volume injection nozzle (5), wherein the baffle member (8) is from a substantially central portion inside the large volume injection nozzle (5). The spray nozzle for a sprayer, wherein a plurality of partition plates (8b) are radially arranged at equal intervals toward the spray nozzle (5a) side of the spray nozzle (5). 2. A spray nozzle for a sprayer, in which a baffle member (8) is arranged inside a large-volume injection nozzle (5), wherein the baffle member (8) is located substantially in the center of the large-volume injection nozzle (5). A plate (8a) is arranged, and a plurality of partition plates (8b) are arranged radially from the outer periphery of the plate (8a) toward the injection port (5a) side of the injection nozzle (5) at equal intervals. A spray nozzle for a sprayer, which is characterized by being. 3. The spray nozzle for a sprayer according to claim 1, wherein the number of partition plates (8b) of the baffle member (8) is three. 4. The spray nozzle for a sprayer according to claim 2, wherein the plate (8a) of the baffle member (8) has a circular shape, and the number of partition plates (8b) is three. . 5. The diameter of the plate (8a) and the width of the partition plate (8b) of the baffle member (8) are each about 1/3 of the inner diameter of the mass injection nozzle (5). Item 4. The spray nozzle for a sprayer according to Item 4. 6. The partition plate (8b) of the baffle member (8) has a length which is about 1/2 of the total length of the injection nozzle (5). 5. The spray nozzle for a sprayer according to item 5.