Gradient-density PUF was produced in two ways : mould shaping and embed shaping, through changing volume filling coefficient, mass filling coefficient, and the size of foam core.

• 采用模塑成型和嵌入成型两种方法,通过改变体积填充系数、质量填充系数和芯体尺寸,制备了梯度密度聚氨酯泡沫塑料。