PET Series

The PET series is a series designed specifically for PET preform production. From the drop-down list on this page you can reach all the models between 250 and 650 Tons.

What sets the series apart

PET behaves differently from standard thermoplastics: in the presence of moisture it undergoes hydrolysis, and when overheated it produces acetaldehyde (AA). In this series the screw geometry is designed for PET (L/D 24) and temperature fluctuation is minimized with PID temperature control. Twin screw technology and a low AA value are what set the series apart.

Who is it suitable for

Preform producers. In applications other than PET the special screw geometry of this series is not meaningful; for general purpose production the SV or HH series are suitable.

Choosing a model in this series

In the PET series the tonnage is determined by the projected area of the preform together with the number of cavities; in multi-cavity preform molds the number of cavities rises quickly. But the real bottleneck is often not the tonnage but the plasticizing capacity — how many kilos of PET an hour you will process affects the machine choice more than the tonnage. The calculations are in the PET preform article and the calculation tools.

In preform production drying is as decisive as the machine: PET must be dried at 160–180 °C, for 4–6 hours and with a −40 °C dew point. The subject is covered in the PET preform production article and on the EasyDry HT page.

For the other series and tonnage bands see the plastic injection molding machine model list page.