SOLUTION ABSORBING CORE, PRODUCTION THEREOF AND VAPORIZATION OF CHEMICAL

摘要

PURPOSE:To obtain a solution absorbing core suitable for controlling insect pests such as mosquitoes and flies, having no fear of decomposing chemicals by blending a mixture of inorganic powder, an organic substance and an inorganic binder with water, shaping, drying and burning the blend at a specific temperature. CONSTITUTION:Inorganic powder such as alumina, silica, talc, mica or diatomaceous earth is blended with an organic substance and an inorganic binder such as various kinds of clay or tar pitch, kneaded with water, then shaped, dried and burnt at 600-2,000 deg.C to give a solution absorbing core. The inorganic binder shows sufficiently binding action during a process of burning. The organic substance blended in the mixed powder evolves CO or CO2 gas during the process of burning, forms open cells in the solution absorbing core to produce the solution absorbing core enough porous to show absorbing performances by capillarity. A solution containing a chemical such as pyrethroid is absorbed in the absorbing core, which is heated to vaporize the chemical.