CN102669155A - A kind of mosquito-repellent incense that can be used alternately and its preparation method - Google Patents

Abstract

The invention discloses a mosquito-repellent incense capable of being alternately used, which comprises carbon powder, plant powder, starch, at least two pyrethroids and perfume. The alternately-used mosquito-repellent incense comprises, by weight, 10% -90% of carbon powder, 10% -90% of plant powder, 0.1% -1% of starch, 0.01% -0.4% of at least two pyrethroids and 0.1% -1% of perfume. The invention can obviously reduce the drug resistance of mosquitoes by alternately using the pyrethroids with different components, thereby achieving good mosquito repelling effect. The invention also discloses a preparation method of the mosquito-repellent incense capable of alternately using the medicine.

Description

A kind of mosquito-repellent incense that can be used alternately and its preparation method

technical field

The invention belongs to the field of burning mosquito-repellent incense, and in particular relates to a mosquito-repellent incense that can be used alternately as medicine and a preparation method thereof.

technical background

In summer, people often use mosquito-repellent incense to repel mosquitoes, and the types of mosquito-repellent incense are also increasingly diverse. At present, mosquito coils mainly include electric heating sheet mosquito coils, electric heating liquid mosquito coils and burning mosquito coils. Electric mosquito coils are made of respirable materials as carriers and added with insecticide liquid as tablets for repelling (killing) mosquitoes. They are used in conjunction with constant temperature electric heaters. At a certain heating temperature, they are evaporated by hot air Drugs, generally effective for 6 to 8 hours, so as to repel (kill) mosquitoes as a household sanitary insecticide. The electric heating liquid mosquito coil is a kind of household sanitation insecticide that utilizes the principle of capillary, and the absorbable mandrel is placed in the bottle containing the insecticidal liquid, and the medicinal substance is released after continuous heating, thereby achieving the effect of repelling (killing) mosquitoes. Bug supplies. Burning mosquito-repellent incense is a kind of household hygienic insecticide made by mixing and pressing pyrethroid, vegetable powder, carbon powder, adhesive and essence.

Nowadays, all kinds of electric heating mosquito coils and electric heating mosquito coils have already entered urban families. But burning type mosquito-repellent incense is still subject to the favor of consumers in general because of it does not need power supply, is easy to use, and is cheap. At present, traditional mosquito-repellent incense has only one active ingredient, and mosquitoes are likely to adapt to it when used all night. For example, the Chinese patent application whose application number is CN200710061868.2 discloses a kind of mosquito-repellent incense for intermittent release of medicine and its manufacturing method. The drug-containing segments are alternately arranged, and the surface layer of the drug-containing segments is impregnated, sprayed or smeared with insecticide drugs. The drug-containing segment and the drug-free segment are alternately burned to realize the intermittent release of drug, aiming to achieve the effect of repelling mosquitoes without biting people, and keeping the drug concentration in the air low. But in fact its use effect is not ideal. Because mosquitoes are ferocious blood-sucking insects, in the season when they multiply in large numbers, even if there are medicines on the mosquito coils, it may not be able to achieve a good repelling effect.

Therefore, it is necessary to provide a mosquito-repellent incense that can be alternately used for medicine and a preparation method thereof, which can repel mosquitoes alternately and achieve the effect of repelling mosquitoes efficiently.

Contents of the invention

The object of the present invention is to provide a mosquito-repellent incense that can be used alternately.

Another object of the present invention is to provide a method for preparing mosquito-repellent incense that can be used alternately.

The purpose of the present invention is achieved through the following technical solutions: a mosquito-repellent incense that can be used alternately, including charcoal powder, plant powder, starch, at least two kinds of pyrethroids and spices.

As a preferred embodiment of the present invention, the mosquito coils that can be used alternately include 10%~90% charcoal powder, 10%~90% plant powder, 0.1%~1% starch, 0.01%~ 0.4% at least two kinds of pyrethroids and 0.1%~1% fragrance.

Further, at least two spices are included, and the content of each spice is 0.1%~1% by weight.

Further, the pyrethroid is allethrin, transfluthrin, perfluthrin, bifluethrin or sefluthrin.

Among them, charcoal powder is the main combustion agent of mosquito-repellent incense, which has less impurities, less smoke, and good heating effect, which can ensure the continuous burning of mosquito-repellent incense, and is conducive to the full play of pyrethroids to achieve mosquito repellent effect. Compared with the mosquito-repellent incense in the prior art, the mosquito-repellent incense of the present invention has stable combustion, a small amount of smoke and dust, remarkable effect of repelling and killing mosquitoes, and has a clear and changeable smell. Since pyrethrin is an insecticidal original drug, it can disturb the normal physiology of insect nerves, causing them to die from excitement, convulsions to paralysis, while allethrin, transfluthrin, perfluthrin, and chlorofluoroether Pyrethrin and seflumethrin have different structures and functions. Alternate use of the ingredients can significantly reduce the insecticide resistance of mosquitoes and achieve a good mosquito repellent effect. In addition, at least two different fragrances are used alternately, which can obviously improve people's sense of smell, and achieve the effects of refreshing and comforting the mind.

Further, the plant powder is an auxiliary combustion agent for mosquito coils, and wood powder or bamboo powder can be selected, wherein the wood powder can be selected from the group including cypress powder, pine powder, and fir powder. The filling effect of plant powder is good, the cost is low, and the heating effect is good, which can ensure that the mosquito coil will not go out halfway; in addition, the content of plant powder added can also ensure the effective burning speed of mosquito coil.

Further, the starch is α-starch. The starch acts as a binder, and the α-starch has a suitable particle size, a fast dissolution rate, and a high paste viscosity. Relying on it to bind other components together to make a disc-shaped body of mosquito-repellent incense, it is not It will affect the smoothness of the surface of the mosquito coil.

Moreover, the pyrethroids used in the present invention are used in a small amount and at a low concentration, which is safer for humans and animals and has little environmental pollution.

Further, the present invention also provides a method for preparing mosquito-repellent incense that can be used alternately, comprising the following steps:

(a) pulverizing the charcoal powder and plant powder and then fully mixing to form the first mixture;

(b) adding starch to the first mixture and stirring evenly to form a second mixture;

(c) extruding the second mixture into a tablet, and then stamping the tablet into a spiral blank to form a spiral blank;

(d) drying the spiral billet to obtain a dry billet;

(f) pairing at least two different pyrethroids with spices to prepare at least two medicinal solutions with different medicinal properties, and then attaching the at least two medicinal solutions to different positions of the dry body, And then obtain the burning type mosquito-repellent incense of alternating medication.

As one of the preferred embodiments of the present invention, the step (f) can be replaced by matching at least two kinds of different pyrethroids with at least two kinds of spices respectively to prepare at least two medicines with different medicinal properties and fragrances. liquid, and then the at least two medicinal liquids are respectively attached to different positions of the dry body, thereby obtaining a burning mosquito-repellent incense that uses medicine alternately and becomes fragrant.

Further, the pulverized particle size of the charcoal powder and vegetable powder in step (a) is 80-150 mesh sieve. The crushing particle size range can maintain the fineness of the surface of the mosquito-repellent incense and the tightness of the interior of the mosquito-repellent incense, which is beneficial to the pressing of the green body, and can ensure that the mosquito-repellent incense has a certain strength, the surface of the incense body is clean, and the color is uniform.

Further, the drying temperature in step (d) is 50-80° C., the drying time is 4-8 hours, and the obtained dry body has a density of 0.7-0.8 g/cm ³ . Mosquito-repellent incense within this density range is not easy to break or deform, and the burning speed is about 1.6~2g/h, which is conducive to the uniform distribution of active ingredients of mosquito-repellent incense within one night (8 hours).

Detailed ways

The present invention adopts artificially synthesized spices, together with charcoal powder, wood flour, starch and at least two kinds of small amounts of pyrethroids, which mainly include the following composition by weight ratio: 10%~90% charcoal powder, 10%~90% plant powder, 0.1%~1% starch, 0.01%~0.4% pyrethroid A, 0.01%~0.4% pyrethroid B, 0.1%~1% fragrance A and 0.1%~1% fragrance B. Wherein, the pyrethroid A and the pyrethroid B are respectively selected from one of allethrin, transfluthrin, perfluthrin, bifluethrin and sefluthrin and different.

The specific preparation method of this burning type mosquito-repellent incense comprises the following steps:

(a) Pulverize the charcoal powder and plant powder, pass through an 80-150 mesh sieve, and mix thoroughly to form the first mixture.

(b) adding starch to the first mixture and stirring evenly to form a second mixture;

(c) extruding the second mixture into a tablet through a tablet press according to a conventional method, and then punching the tablet into a spiral blank with a punching machine to form a spiral blank;

(d) Put the spiral billet into a drying room, and dry it at a temperature of 50-80°C for 4-8 hours to obtain a dry billet; the density of the obtained dry billet is 0.7-0.8 g/cm ³ .

(f) Mix pyrethroid A and pyrethroid B raw materials with organic solvents (such as ethanol) and spices A or spices B respectively, and prepare two kinds of medicinal liquids with different medicinal properties at required concentrations, and then mix The at least two kinds of medicinal liquids are respectively sprayed on different positions of the dry body, or the dry body is soaked in the medicinal liquid, so as to obtain a burning mosquito-repellent incense that uses medicine alternately and changes fragrance.

Finally, put the treated burning mosquito-repellent coils into cartons, shrink the film and pack them into boxes.

The technical solutions and effects of the present invention will be further described below through examples, but the present invention is not limited to the following examples.

Embodiment one:

First, add 10g of charcoal powder and 89.9g of wood powder respectively, grind them through a 100-mesh sieve, and mix them well. Then add 0.1g of starch and stir evenly. Then, the mixed paste is extruded into a sheet by a tablet press, and the tablet is punched into a spiral blank of mosquito coils with a punching machine. Next, put the spiral billet into a drying room, and dry it at 80° C. for 4 hours to obtain a dry billet with a density of 0.7 g/cm ³ . Subsequently, the dry billet is put into the spraying workshop, half of which is sprayed with 1.5ml of ethanol solution with a concentration of 0.03g/mL allethrin and 0.01g/mL lemon essence, and the other half is sprayed with a concentration of 0.002g/ml of tetrafluoroethylene 1.5ml ethanol solution of methothrin and 0.02g/mL chrysanthemum essence. Finally, put the processed dry blank into a carton, shrink the film, and pack it into a box to obtain a burning mosquito-repellent incense. The resulting product number is 1.

Embodiment two:

First, add 30g of charcoal powder and 69.7g of wood powder respectively, grind them through an 80-mesh sieve, and mix them well. Then add 0.3g of starch and stir evenly. Then, the mixed paste is extruded into a sheet by a tablet press, and the tablet is punched into a spiral blank of mosquito coils with a punching machine. Next, put the spiral billet into a drying room, and dry it at 60°C for 6 hours to obtain a dry billet with a density of 0.7g/cm ³ . Subsequently, the dry billet is put into the spraying workshop, half of which is sprayed with 1.5ml of ethanol solution with a concentration of 0.04g/mL allethrin and 0.02g/mL green tea essence, and the other half is sprayed with a concentration of 0.005g/ml of tetrafluoroethylene 1.5ml of ethanol solution of phenthrin and 0.03g/mL vanilla essence. Finally, put the processed dry blank into a carton, shrink the film, and pack it into a box to obtain a burning mosquito-repellent incense. The resulting product number is 2.

Embodiment three:

First, add 50g of charcoal powder and 49.5g of wood powder respectively, grind them through a 120-mesh sieve, and mix them well. Then add 0.5g of starch and stir evenly. Then, the mixed paste is extruded into a sheet by a tablet press, and the tablet is punched into a spiral blank of mosquito coils with a punching machine. Next, put the spiral billet into a drying room, and dry it at 50°C for 8 hours to obtain a dry billet with a density of 0.8 g/cm ³ . Subsequently, the dry blank is put into the spraying workshop, half of which is sprayed with 1.5ml of ethanol solution of 0.003g/mL transfluthrin and 0.1g/mL lily essence, and the other half is sprayed with 0.003g/ml of Tetrafluthrin. 1.5ml ethanol solution of flumethrin and 0.01g/mL lavender essence. Finally, put the processed dry blank into a carton, shrink the film, and pack it into a box to obtain a burning mosquito-repellent incense. The resulting product number is 3.

Embodiment four:

First, add 70g of charcoal powder and 29.3g of wood powder respectively, grind them through a 150-mesh sieve, and mix them well. Then add 0.7g of starch and stir evenly. Then, the mixed paste is extruded into a sheet by a tablet press, and the tablet is punched into a spiral blank of mosquito coils with a punching machine. Next, put the spiral billet into a drying room, and dry it at 70°C for 7 hours to obtain a dry billet with a density of 0.8g/cm ³ . Subsequently, the dry billet was put into the spraying workshop, and half of it was sprayed with 1.5ml of ethanol solution of 0.005g/mL chlorofluoromethrin and 0.02g/mL lotus essence, and the other half was sprayed with 0.001g/ml of four 1.5ml ethanol solution of flumethrin and 0.08g/mL jasmine essence. Finally, put the processed dry blank into a carton, shrink the film, and pack it into a box to obtain a burning mosquito-repellent incense. The resulting product number is 4.

Embodiment five:

First, add 89g of charcoal powder and 10g of wood powder respectively, grind them through a 120-mesh sieve, and mix them well. Then add 1g of starch and stir evenly. Then, the mixed paste is extruded into a sheet by a tablet press, and the tablet is punched into a spiral blank of mosquito coils with a punching machine. Next, put the spiral billet into a drying room, and dry it at 70°C for 5 hours to obtain a dry billet with a density of 0.8g/cm ³ . Subsequently, the dry blank is put into the spraying workshop, and half of it is sprayed with 1.5ml of an ethanol solution of 0.004g/mL chlorofluoromethrin and 0.05g/mL rose essence, and the other half is sprayed with a concentration of 0.004g/ml. 1.5ml ethanol solution of flumethrin and 0.05g/mL perfume essence. Finally, put the processed dry blank into a carton, shrink the film, and pack it into a box to obtain a burning mosquito-repellent incense. The resulting product number is 5.

Comparative example:

According to the manufacturing process of an improved smokeless mosquito-repellent incense disclosed by the Chinese patent No. CN02121215.5, 500g of dry distillation coal, 39g of charcoal, 6g of bentonite, 4.9g of kaolin, 0.1g of allethrin and trace amounts of The spices are mixed, then compression-molded and dried to obtain the smokeless mosquito-repellent incense, and the obtained product number is 6.

Experimental results detection:

The mosquito-repellent incense that above-mentioned embodiment 1～5 and comparative example obtain are tested, and test method is as follows:

(1) Odor inspection: sensory, no irritating odor.

(2) Drug efficacy inspection: test according to GB/T13917. At room temperature, use a cylindrical device to absorb 30 test mosquitoes, put them into the central hole of the circular plate under the cylinder, and tighten the rubber stopper. After the test insects resume normal activities, randomly take a section of the mosquito coil to be tested, and place it horizontally on the mosquito coil rack. After lighting it in another place for 5 minutes, move it to the cylinder to smoke for 1 minute, remove the mosquito coil immediately, and plug it with a rubber plug. , and timing, record the number of trial insects knocked down at regular intervals. The observation time limit is 20min. At the same time, a blank test must be carried out. If the knockdown rate and mortality rate of the blank test are greater than 20%, the test needs to be repeated. The above detection method was repeated 3 times, and different mosquito coils prepared in the examples were randomly selected for detection in the repeated test. And after each test, clean the test device. The test result is represented by KT50 (under specified conditions, the time required for 50% of the test insects to be knocked down).

(3) Smoke and dust emission inspection: test according to HJ/T 310.

According to the national environmental protection industry standard HJ/T 310 test, after igniting the single-circle disc mosquito coil, use the filter membrane (paper) to collect all the smoke and dust discharged until the ignition is completed. The weight of the collected smoke and dust is expressed in g/single circle. The ultra-fine glass fiber filter paper is accurately weighed with an analytical balance, the filter paper is fixed on the sampling clip, and the filter paper is taken and placed with stainless steel tweezers during operation. Adjust the flow rate of the sampler to 20 liters per minute, place the sampler at a distance of 10 cm from the mosquito coil to be tested, and align the sampling clip with the mosquito coil. Light the mosquito coils and sample for 0.5 to 2 hours. Remove the filter paper, put it in a desiccator, and weigh it accurately with an analytical balance after 1 hour. After sampling, the mosquito-repellent incense is extinguished, and the mass or length of the mosquito-repellent incense before and after ignition is weighed with a drug balance. At the same time, use another filter paper as the indoor blank control as the background of indoor air smoke. The test result is expressed by smoke emission (mg/single turn).

The comparison results show that the efficacy of the mosquito-repellent incense in Comparative Examples is 6 to 7 minutes (that is, the time for half of the mosquitoes to be killed takes 6 to 7 minutes), while the efficacy of the burning mosquito-repellent incense in Examples 1 to 5 is less than 4 minutes (that is, half of the mosquitoes are killed). Half of the mosquitoes are killed in less than 4 minutes), and the smoke emission is less than 30mg/single circle. It can be seen that, compared with the mosquito-repellent coils in Comparative Examples, the mosquito knockdown rate of the mosquito-repellent coils in Examples 1-5 is significantly improved. The comparison results are shown in Table 1.

Table 1 The results of the comparative test on the properties of mosquito-repellent incense

Claims (10)

1. A mosquito-repellent incense that can be used alternately, is characterized in that: it comprises charcoal powder, plant powder, starch, at least two kinds of pyrethroids and spices. 2. The mosquito-repellent incense that can be used alternately according to claim 1 is characterized in that: calculated by weight percentage, the mosquito-repellent incense that can be used alternately includes 10%~90% charcoal powder, 10%~90% plant powder, 0.1 %~1% starch, 0.01%~0.4% at least two kinds of pyrethroids and 0.1%~1% fragrance respectively. 3. The mosquito-repellent incense that can be used alternately according to claim 2, characterized in that it includes at least two spices, and the weight percentage of each spice is 0.1%~1%. 4. The mosquito-repellent incense that can be used alternately according to claim 2 or 3, is characterized in that: the pyrethroid is allethrin, transfluthrin, perfluthrin, chlorofluthrin or seflumethrin. 5. The hygienic pest control spray according to claim 4, characterized in that: the plant powder is wood powder or bamboo powder. 6. The hygienic pest control spray according to claim 4, characterized in that: the starch is α-starch. 7. A preparation method of a mosquito-repellent incense that can be used alternately, comprising the steps of: (a) pulverizing the charcoal powder and plant powder and then fully mixing to form the first mixture; (b) adding starch to the first mixture and stirring evenly to form a second mixture; (c) extruding the second mixture into a tablet, and then stamping the tablet into a spiral blank to form a spiral blank; (d) drying the spiral billet to obtain a dry billet; (f) Matching at least two different pyrethroids with spices to prepare at least two medicinal solutions with different medicinal properties, and then attaching the at least two medicinal solutions to different positions of the dry body. 8. The preparation method according to claim 7, characterized in that: the step (f) is replaced by matching at least two kinds of different pyrethroids with at least two kinds of spices respectively, and formulating at least two medicinal properties and medicinal liquids with different fragrances, and then the at least two medicinal liquids are respectively attached to different positions of the dry body. 9. The preparation method according to claim 7, characterized in that: the charcoal powder and plant powder in the step (a) have a particle size of 80-150 mesh sieves. 10. The preparation method according to claim 8, characterized in that: the drying temperature in step (d) is 50-80°C, the drying time is 4-8 hours, and the density of the obtained dry body is 0.7-0.8 g/cm ³ .