A new class of beverage closures for PET carbonated soft-drink (CSD) bottles features a shorter design that cuts overall bottle weight and cost.

A new class of beverage closures for PET carbonated soft-drink (CSD) bottles features a shorter design that cuts overall bottle weight and cost. The new 28-mm Xtra-Lok mini closure from Alcoa Closure Systems International, Indianapolis, has reduced thread depth. That enables shortening the neck finish-the heaviest area of the bottle-and reducing the PET bottle finish weight by 1.4 g, or 27%, versus the industry-standard 1810 PCO finish on CSD bottles of up to 20 oz, says John Grainda, Alcoa marketing manager. The height of Alcoa's new 1873 PP closure is 0.600 in. Grainda says Alcoa retained as much as possible of the dimensions and design features of current PET bottle finishes so that the new compression molded cap could be readily adapted by bottle makers. Some minor filling-line equipment modifications may be required. Alcoa offers a "quick-change" bottle capper conversion kit at an estimated one-time cost of $20,000 to $25,000. The new closure reportedly costs about the same as conventional ones. The first commercial application is expected in early 2007. Tel: (317) 390-5000 . www.alcoa.com