目的 研究废箱板纸和数字印刷废纸混合比例对发泡材料各项性能的影响，确定最佳纤维混合比例。方法 以废箱板纸和数字印刷废纸为主要原料，通过微波发泡法制备了一种废纸纤维发泡材料，通过微距镜头及扫描电镜对发泡材料微观结构进行观察。结果 研究表明，当废箱板纸纤维和数字印刷废纸纤维质量比为12.5∶2.5时，得到的材料综合性能最优，其密度为0.112 g/cm³、发泡倍率为1.728、变形能为6.463×10⁴J/m³、缓冲系数为5.922。结论 将2种废纸纤维混合起来所制备的发泡材料具有低密度、高发泡倍率和较好的缓冲性能。

The work aims to study the effects of mixing ratio of waste box board paper and digital printing waste paper on the properties of foaming materialand determine the optimum fiber mixing ratio. A kind of waste paper fiber foaming material was prepared by microwave foaming method withwaste box board paper and digital printing waste paper as main raw materials. The microstructure of foaming material was observed by macro lens and scanning electron microscope. The results showed that when the ratio of waste box board paper fiber and digital printing waste paper fiber was 12.5:2.5, the material hadthe best comprehensive performance, the density was 0.112 g/cm3, the foaming ratio was 1.728, the deformation energy was 6.463×104 J/m3, and the buffer coefficient was 5.922. The foaming material prepared by mixing two kinds of waste paper fibers has low density, high foaming ratio and good buffering performance.