Polyamide 6 (PA 6) with different relative viscosities (RV) have been prepared and their thermal, rheological as well as crystallization properties are highly dependent on their RV. Since PA 6 with RV of 3.16 exhibits the highest crystallization speed, it has been subsequently extrusion-molded to give lab-made PA 6 film. After biaxially stretched, lab-made biaxially-oriented PA 6 (BOPA6) films have eventually manufactured. Experimental results represent that lab-made BOPA6 film with biaxially stretching ratio of 300% performs superior physical properties to lab-made PA 6 film and commercial Unitika ON-15, proving that it is a highly potential polymeric film for electrical encapsulation and food packages.
