If die ratio of primary suspending agent to co-suspending agent was 14/1, and the values of A1/B1 and A2/B1 were 1.5/1 or 1/1, the PVC with bulk density of 0.51 g/ml and porosity of 25 gDOP/gPVC could be produced.

• 使用三元，如 AI /BI /AIO或 A28 /AIO复合分散剂体系，当主/助分散剂配比为14/l，A181 或AZ/BI 配比为1.；5/l 和1/l 时，表观密度最大0