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一种产品、农药的技术，应用在可燃产品领域，能够解决灭蚊盘卷易破裂等问题
Inactive Publication Date: 2005-11-23
RECKITT BENCKISER AUSTRALIA
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Abstract
Description
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Problems solved by technology
[0008] As mentioned above, mosquito coils typically break easily
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0067] Cardboard: Recycled, single ply, containing 10% starch, density 690 kg / m3, thickness 3.6 mm, single coil weight about 15 g.
[0068] Additives: added to the pulp, the final concentration in the dry cardboard is: potassium nitrate accounted for 1.108% by weight, sodium silicate accounted for 0.554% by weight.
[0069] Burn time (coil length 72 cm): 7 hours 50 minutes to 8 hours and 3 minutes (average 7 hours 58 minutes).
Embodiment 2
[0071] Cardboard: Recycled, single ply, containing 10% starch, density 685 kg / m3, thickness 3.6 mm, single coil weight about 15 g.
[0072] Additive: Spray on both sides of the coil. The additive solution contains: 7.5% by weight of potassium carbonate, 5% by weight of sodium silicate (balance: water).
[0073] Coat weight: 38 g / m2. The final concentrations in the dry coils were: 0.12% by weight of potassium carbonate and 0.08% by weight of sodium silicate.
[0074] Burn time (coil length 72 cm): 6 hours and 3 minutes to 6 hours and 19 minutes (average 6 hours and 11 minutes).
Embodiment 3
[0076] Cardboard: Recycled, 4-ply polyvinyl alcohol laminated, density 587 kg / m3, thickness 3.0 mm, individual coil weight approx. 11 g.
[0077] Additives: Spray on both sides. First coat: 6% by weight sodium tetraborate in water with a coating weight of 104 g / m2 (0.35% by weight in the coil after drying). Second coating: there are 7.5% by weight of potassium carbonate and 5% by weight of sodium silicate in water, the coating weight is 65 g / m2 (the concentration in the coil after drying is 0.28% by weight of potassium carbonate and 0.18 % by weight of sodium silicate).
[0078] NOTE: There was no drying between the first and second coats applied to the coil.
[0080] The following are some examples of mosquito coils containing active insecticides:
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PUM
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Abstract
A combustible pesticidal product is disclosed which comprises a structural element formed from a cardboard having a thickness of at least 0.75 mm, a density of 450-850 kgm<3> and consisting of 1 or more plies, the cardboard including: an alkali or alkaline earth metal nitrate or nitrite in an amount of from 0 to 1.83 % w / w, or an alkali or alkaline earth carbonate or bicarbonate in an amount of from 0.02 to 7.0 % w / w; one or more mineral silicates in an amount of from 0.01 to 8.0 % w / w; a phosphate in an amount of from 0.01 to 0.40 % w / w and selected from the group consisting of diammonium phosphate, monoammonium phosphate, triammonium phosphate and mixtures thereof; a boron compound in an amount of from 0.001 to 0.92 % w / w (as boron) and selected from the group consisting of boric acid, sodium tetraborate hydrous, sodium borate, potassium borate, calcium borate, zinc perborate, boronatrocalcite and mixtures thereof; one or more pesticides; and optionally a perfume and / or a dye, which product on combustion emanates the pesticide into the atmosphere. Typically the combustible product will be a mosquito coil which has been impregnated with one or more insecticides effective against mosquitoes. On combustion of the coil, insecticide is emanated into the atmosphere for a period of at least 4 hours. However, the coils of the invention may be active against mosquitoes for 8 hours or more.
Description
technical field [0001] The present invention relates to combustible products which emit pesticides into the air when burned, and more particularly, the present invention relates to products which burn for an extended period of time and thus have an extended duration of action. Background technique [0002] Products of the type to which the present invention relates are commonly referred to as "mosquito coils". These coils are characterized by a circular spiral of combustible material. Combustible materials include one or more pesticides, which are insecticides when the product is active against mosquitoes. When this product is burned, the pesticide is released into the air due to its volatility. Ideally, such coils would provide the air with an effective amount of insecticide for a reasonably long period of time. [0003] The environment in which mosquito repellent coils are used is typically a place where people sleep and are bitten by mosquitoes because they are unable ...
Claims
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Application Information
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