... 1.special POF mold automatic control technology 2.Special far infrared heating oven technology for POF: special PID control sys POF ... , MLDPE and PP as material, then, going through second heating and two-way stretching, finally, folding and slitting. POF ... thickness. 3.special POF mold automatic control technology4.Special far infrared heating oven technology for POF: special PID control system with ...