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杀虫剂微胶囊是一种缓释剂,是目前具有恒定释放率的最好的剂型之一。微胶囊为将显微大小的液体或固体粒子包裹在保护膜中,使杀虫药在使用时,通过囊壁缓慢地释放出来。微胶囊的粒子大小一般为1—200微米。 微胶囊技术在一些工艺范围中已应用多年。美国在微胶囊技术方面发展很快,从1954年首先制成NCR无碳复写纸后,应用范围逐渐扩大。但是,应用到杀虫剂方面,还是七十年代以后,特别是1974年,美国Rennwalt公司制成甲基对硫磷微胶囊,并首次畅销于市场之后,杀虫剂微胶囊的研究工作才日趋活跃。
Insecticide microcapsules are a sustained-release agent and are currently one of the best formulations with a constant rate of release. Microcapsules for the microscopic size of the liquid or solid particles wrapped in the protective film, insecticide in use, through the wall slowly released. The size of the microcapsules is generally 1-200 microns. Microcapsule technology has been used in many process areas for many years. The United States has developed rapidly in microcapsule technology. Since 1954, NCR carbon-free copy paper was first made and its application scope has been gradually expanded. However, the application of insecticide, or after the seventies, especially in 1974, the United States Rennwalt company made of methyl parathion microcapsules, and the first time the best-selling in the market, the insecticide microcapsules only after the increasingly active.