Among the non-halogen flame retardants, red phosphorus is a good flame retardant, which has the advantages of less added amount, high flame retardant efficiency, low smoke, low toxicity and wide application; red phosphorus and aluminum hydroxide, expanded graphite Inorganic flame retardant is compounded to produce composite phosphorus/magnesium; non-halogen flame retardant such as phosphorus/aluminum; phosphorus/graphite, which can be used to greatly reduce the flame retardant dosage, thereby improving the processing properties and physical and mechanical properties of plastic products. . However, ordinary red phosphorus is easily oxidized and hygroscopic in the air, which is liable to cause dust explosion, transportation difficulties, poor compatibility with polymer materials, and the application range is limited. In order to make up for this deficiency, in order to expand the application range of red phosphorus, we have adopted advanced foreign microcapsule coating technology to make it into microencapsulated red phosphorus. In addition to overcoming the inherent drawbacks of red phosphorus, microencapsulated red phosphorus has high efficiency, low smoke, and does not produce toxic gases during processing. Its dispersibility, physical, mechanical properties, thermal stability and flame retardant properties are improved. improve.