PET pack production line in the production as the polypropylene resin and the auxiliary material, according to need formula requirements measuring, mixing respectively add to the pack in the molten plastic machinery, and then from forming die lips mouth extrusion have certain thickness and width and ribbon melt, in the water cooling to finalize the design, then through preheating, surface tension embossing namely after pack into polypropylene. (1) plastic source a new generation of pack the extruder production line for the host machine screw diameter 96, paid the machine screw diameter 70, screw length-diameter ratio = 23:1, screw for mutations type screw, the nose with the right type head. Electric heating. (2) pack to bring equipment cooling water tank high and low position can free adjustment. (3) pack to bring mechanical use two-way stretch device, traction with double roller spin the pressure type in traction roller. With two stepless speed device, rollers, regulate the speed, two stretch before and after the formation of the different linear velocity difference. Roll (4) mechanical drawing slot pack for wet tensile, electric heating water bath, far infrared ray heat.