SIPA releases four new lightweight neck designs for PET bottles

PMCI, the PET moulds and containers division of SIPA have designed the new necks for PCO 1810 standard CSD closures that use the same height of the thread finish (21mm) as standard designs, however offers 27% material savings, bringing the individual weight down from 5.1g to 3.7g – 1.4g per neck.

No changes are required to the neck shape and the solution is fully compatible with existing bottle lines, with existing thread easily converted to the PMCI design. A US mineral water company is utilising this new technology and has patented a new design for an Alcoa neck with a 26mm thread finish, taking the weight down from 2.4g to 1.8g – resulting in a 25% saving in their packaging costs.

Hot fill technology has traditionally required the use of robust packaging, however PMCI claim the new neck designs enables significant savings for 28mm necks. The Hotlight 28 neck weighs just 3.8g, half that of the standard 7.8g. This evolution in neck design allows for the production of hot fill and CSD products on the same line, without any compromise to sealing