In the race for weight savings in PET bottles, every gram counts — including material used in the bottle neck.
Corvaglia AG, an Eschlikon, Switzerland, maker of caps, closures and related molds, has designed the “PCO Corvalgia,” a preform neck finish that saves 1.5 grams of PET resin in the bottle neck finish. In addition, the material on the cap itself is between 0.7 and 1.2 grams.
The company claims it is the only short neck finish that maintains the distance between the neck ring and the tamper band. That means existing grippers can be used on the filling line.
The PCO Corvaglia is the same height as the three-start, 1-inch “Alaska” finish, which reduces the cost of adapting existing machinery on a filling line.
Also, the company claims the PCO Corvaglia is the only short neck finish with a thread that incorporates more than two full turns, giving better sealing performance than other caps that may have only one full turn.
Corvalgia makes closures and caps for carbonated and still beverages, water, juices, dairy products and edible oil. For the short neck finish design, the company makes three different caps: a 1.8-gram cap for still water and other still beverages, a 2-gram cap and a 2.3-gram cap for carbonated beverages.
Tel. 49-23-5929-96-0, fax 49-23 5929-96-10, e-mail [email protected]