Abstract: Three kinds of PVC sheets with different orientation degree were prepared using a self-made micro-nano lamination device in this paper. The properties of the sheets had been characterized using scanning electron microscope, universal testing machine, density and thermal volatilization loss rate. Mechanical properties, density and heat loss rate test showed that: compared with the PVC sheets prepared without lamination device, along the extrusion direction the tensile strength of the sheets prepared with 2 and 4 lamination devices had increased by 5.72 and 10.18%, the density had increased by 2.81 and 4.35%, the volatilization loss rate had decreased by 13.12 and 37.65%, respectively.

Key words: poly (vinyl chloride), micro-nano lamination extrusiion, molecular orientation, plasticizer