2012: launch of the first patented energy saving told base: the Low Pressure Base
In 2012, Comep concentrated innovation efforts on energy savings thanks to its high expertise on blow molds for the PET industry. The goal was to generate significant energy savings in the PET blow holding process by reducing the blowing pressure, the production of compressed air being the major source of energy consumption. The solution consists in facilitating the evacuation of the air outside the cavity thanks to a specific mold design.
The low pressure technology is extended in the shells. To be applicable, the shape of the bottle should include enough engravings and/or ribs for positioning the grooves. With such shell, in addition to the base, a 1.5 Liter still water bottle (light weight 21 grams) is industrially blown at less than 15 bars on several production lines for more than 2 years. Several benefits have been confirmed :
- more flexible process settings giving additional process degrees;
- highly recommendable for high speed machines (the contact between the hot PET and the molding surface occurs faster, allowing a more quick
- cooling of the bottle);
- higher mechanical resistance.
As first player with these unprecedented innovations in the PET blow molding industry, Comep is proud to support the energy savings strategies of its customers.