With extending the period of hot water foamingtime, the density of foamed sheet was decreased.
随着热水发泡时间的延长,泡沫塑料密度呈现负相关的联系。
2
Effect of foamingtime on the density and porosity of foam aluminum was discussed in detail. Evolution of pores in the foaming process was described, and the foaming mechanism was analysed.
This paper probes into the influences of such factors as dispersing agent, ultrasonic dispersion time, and stirring sample on the value of the grain size of foaming agent ADC.