目的 为提高发射药塑料包装箱的阻燃性能，设计一种新型阻燃改性HDPE塑料箱。方法 利用燃烧和相容性实验研究了十溴二苯醚和三氧化二锑2种阻燃剂含量、比例对HDPE塑料阻燃性能和相容性的影响，并通过理论分析探讨了2种阻燃剂对HDPE塑料的阻燃机理。结果 实验结果表明，未经阻燃改性的HDPE塑料阻燃效果较差，随着阻燃剂含量的增加，阻燃性能得到提高，相容性变差。结论 阻燃剂中十溴二苯醚和三氧化二锑的质量比为2∶1时，阻燃效果最佳，阻燃剂含量（质量分数）低于11%时，可以满足相容性要求。

The paper aims to design a new type of flame-resistant HDPE plastic box to improve the flame resistance of plastic box for the packaging of gun propellants. The effects of the content and ratio of two kinds of flame retardants, decabromodiphenyl ether and antimony trioxide, on the flame resistance and compatibility of HDPE plastics were inves-tigated by combustion and compatibility tests and the flame resistance mechanisms of the two kinds of flame retardants on HDPE plastics were analyzed theoretically. The test results showed that the flame resistant effect of HDPE plastics without flame retardant modification was poor. With the increase of the content of flame retardant, the flame resistance was improved, and the compatibility was weakened. When the ratio between decabromodiphenyl ether and antimony trioxide is 2∶1, the flame resistance effect is the best; when the content of fire retardant is lower than 11%, the compatibility requirements can be satisfied.