Mosquito coils used to be thin rods, called incense, about 30 cm long and can be lit for an hour. It is now spiral, so it is called disc-type mosquito coil, with a total length of 130 cm, which can be ignited for 7-8 hours. The temperature of the mosquito-burning point is as high as 700-800 ° C, but the temperature at 6-8 mm behind it is 170. Around °C, it is just the volatilization temperature required for the insecticidal active ingredient in mosquito coils, and it is also the temperature at which the essence volatilizes particularly fast.
Disc mosquito coil
As a pesticide used directly in the living room, mosquito coils must ensure the quality of the product, the effectiveness and safety of the product.
Second, the production process
There are black, green and yellow mosquito coils on the surface of the mosquito coils. Although it may be different from the pigments added, there are actually differences between them - the materials used are different, the formulas are different, and the cost is different. There are different smoke sizes after burning. Therefore, in order to produce high-quality mosquito-repellent incense, in addition to a reasonable formula, we must choose the various materials used.
Black mosquito coils, need to use carbon powder, carbon powder is often alkaline, will reduce the efficacy of pyrethroids, so in the production of black mosquito coils, pay attention to the acidity and alkalinity of the powder; especially smokeless mosquitoes due to the use of carbon powder Instead of wood powder, it will be smoked after ignition and the alkalinity may be greater. It should be noted that although the black mosquito-repellent smoke-free type is more "environmentally friendly", it will not smoke the room and smoke, but the materials used are the most stressful. If there is less charcoal, there will be smoke, and more bending resistance and burning time will be affected. In addition to mastering the amount of toner, it is necessary to acid-treat the carbon powder with nitric acid to make the pH slightly less than 7 slightly acidic; and the by-product potassium nitrate (or sodium) has a combustion-supporting effect, which is beneficial to the quality of the smokeless mosquito. improve.
In the past, the disc-type mosquito-repellent incense production machinery used in the mosquito-repellent industry in China mainly used single-mode machines and dual-mode machines. These two machines have been used for about 50 years. Later, it developed into a more advanced 18-module, 24-mode multi-head automation production machine, which not only speeds up, but also improves the quality. The flatness of the blank is also very good, and the wage cost is greatly reduced, and the work is improved. effectiveness.
