Amcor PET Packaging, Ann Arbor, Mich., is making extensive use of blow-trim technology to boost production rates for PET food jars.

Amcor PET Packaging, Ann Arbor, Mich., is making extensive use of blow-trim technology to boost production rates for PET food jars. Most recently, Amcor converted Hellmann's 15-oz mayonnaise jar to PET using two-step stretch-blow molding after launching a 32-oz version late last year. Until now, the blow-trim approach has been used for smaller runs of food packaging on slower one-step stretch-blow processes. The blow-trim process allows a widemouth jar to be produced from a standard narrow-neck preform, eliminating the need for separate, costly preform injection tooling. The 70-mm widemouth finish is built into the bottle mold and not the preform. When the container is removed from the mold, it has two portions, the threaded finish and an upper dome that is trimmed off during an in-line process. Amcor's high-volume approach utilizes a Husky preform injection machine, a high-speed Sidel Series2 reheat stretch-blow molder, and a Belvac rotary trimmer. Amcor claims that the output achieved with this blow-trim technology is similar to that of PET beverage bottles. The Hellmann's jars are said to represent two of the industry's highest-volume blow-trim applications. Amcor: (734) 428-9741 . www.amcor.com