Abstract：By studying the working principles and disadvantages of four kinds of granulating technologies,the particle size distribution,bulk density,tap density,as well as extreme difference of tablet weigh and compressive strength of the prepared airbag gas generent particles were tested and analyzed. The difference among the parameters of particles in the four kinds of technologies was compared. The results show that the size distribution of the airbag gas generent particles prepared by spray system is more concentrated. The degree of compression and tablet weight variation extreme value of tablets pressed by particles are less,and the lateral pressure strength is greater. The less the angle of repose is,the less the degree of compression is,and the less the extreme difference of tablet weigh is. The particle degree of compression and compressive strength of tablets appear linear relationship.

Keywords: granulate; gas generent; angle of repose; degree of compression