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PermaNet® 2.0 Curtains - FAQ What are PermaNet® Curtains? PermaNet® Curtains are long-lasting, insecticide-treated curtains. Made of 100% polyester, PermaNet® Curtains are impregnated according to the specifications, customer quality control systems and requirements of international health and aid organisations. What are the technical definitions of Knock Down (KD), Total Mortality (TM) and Functional Mortality (FM)? - Knock Down (KD) effect refers to the vector-disabling effects of the curtains. Mosquitoes are poisoned by the insecticide   on the curtains and fall to the ground, unable to move. In theory, these mosquitoes should eventually regain movement.   In reality (and outside laboratory conditions), these mosquitoes are eaten by ants before they can regain consciousness. - Total Mortality (TM) refers to dead mosquitoes. - Functional Mortality (FM) refers to mosquitoes disabled beyond the point of survival. Mosquitoes that are either lifeless or have lost more than two legs or one wing are included in FM rate.\ What makes the mosquitoes loose legs? Pyrethroid is a neurological insecticide that is absorbed by the legs of the mosquito. When the poison is detected, mosquitoes often dispose of the affected legs. With only three or fewer legs, they can no longer fly, land or bite. Can PermaNet® Curtains, after having been washed to exhaustion, be re-impregnated by a normal dipping procedure? Yes, PermaNet® Curtains can be re-impregnated after having been washed to exhaustion. Which pyrethroid is used for treating PermaNet® Curtains? Deltamethrin, a cyano-pyrethroid, has been used to treat PermaNet® Curtains. This is because: - Deltamethrin has good adhesion abilities to polyester - Deltamethrin has a good toxicology profile which makes it practically harmless to humans - Deltamethrin has undergone the WHO Pesticide Evaluation Scheme (WHOPES) What dose of Deltamethrin is used in PermaNet® Curtains? The target dosage is 55 mg/m². Is the Culex Quinquefasciatus mosquito susceptible to PermaNet® Curtains? Although the Culex mosquito generally has a higher resistance to pyrethroids, PermaNet® Curtains retain a high repellence level. Due to the unique distribution and release of Deltamethrin in PermaNet® Curtains, insects rest longer on them, assuring eventual mortality. Is Deltamethrin the sole insecticide used in PermaNet® Curtains? At the moment, Deltamethrin is the only insecticide used in PermaNet® Curtains. We maintain our commitment to testing other insecticides to look for as yet-undiscovered benefits in specific areas. Are PermaNet® Curtains dirt repellent? As the result of a specialized dirt-repellent treatment, PermaNet® Curtains do not attract as much dirt and dust as other nets. PermaNet® Curtains are especially easy to clean and require no manual friction, even in cold water. Consequently, the occurrence of abrasion to the net is diminished and the longevity of the net is prolonged. How are PermaNet® Curtains produced? PermaNet® Curtains are warp-knitted from strong, 100% polyester yarns. Our excellent production techniques provide PermaNet® Curtains with uniformly woven netting material. To set the net and prevent shrinkage, the fabric is placed on a stenter and exposed to high heat. The next step, Deltamethrin-impregnation, uses a continuous industrial process that secures exact concentration and equal distribution of the insecticide, guaranteeing the long-lasting effects of PermaNet® Curtains. Lastly, the netting material is cut and sewn into various sizes that represent ready-to-use PermaNet® Curtains. Every process is subject to extensive inline controls, which ensure that every finished PermaNet® Curtains meet company specifications and WHO recommendations.