The DYNAPAK packing machines are designed according to two main principles: modularity and flexibility. The machines can work with two polyethylene rolls at the same time in order to optimise the package by using only the necessary quantity of polyethylene without producing any waste. Through a specific patented system it is possible to change the two polyethylene working widths automatically. The machines are equipped with two or four storage positions suitable for polyethylene rolls of the same or different width.