Improving oval PET bottles: higher quality with preferential heating from KHS
Special bottle shapes make high demands of many stretch blow molders during production. The preferential heating system (PH) developed by the KHS Group now enables bottlers to achieve perfect bottle quality even with extremely oval bottles in an energy-saving, safe and reliable process. The systems provider now also offers this option for its successful InnoPET Blomax Series IV.
Regarding the energy-efficient manufacture of PET bottles the InnoPET Blomax Series IV stretch blow molder is one of the most powerful on the market. With preferential heating fillers of oval bottles benefit from a manufacturing process which KHS has been successfully applying in older series of stretch blow molders since the 1990s.
Homecare and personal care products in focus
In transferring the technology to the latest series of KHS stretch blow molders all the benefits over previous machines are retained. These include the much lower use of energy and the simpler design. Especially when processing items such as cleaning agents, laundry detergents or personal care products, which are very often filled into oval PET bottles, this process has many advantages.
“Without preferential heating the preform is heated evenly in the stretch blow molder”, explains Marco Böhnke, product manager at KHS Corpoplast. “This means that the areas of the bottle which come into contact with the blow mold first cool down before the others”.