Considering the request of protecting environment, the usage of halogen flame retardants was limited in the polyolefin and the intumescent flame retardant is springing up.

• 目前，鉴于环境保护方面的要求，聚烯烃中使用的含卤阻燃剂受到限制，膨胀阻燃剂成为首选的。