The LiquiForm Group is a joint venture between the packaging specialist Amcor and the blow moulding machinery manufacturer Sidel. The Group has also signed agreements with and IP contributions from Japan’s largest plastic bottle manufacturer, Yoshino Kogyosho, and bottled water brand owner, Nestlé Waters. After representatives of the LiquiForm Group initially presented the new process at last year’s PETnology Conference, this year they reported on the latest practical tests and results. “We spent last year extensively testing bottles produced in this single step process and are thrilled with the excellent results,” says O’Hara. On top of the simplicity advantages that a single step machine entails, LiquiFormTM also boasts superior “bottle engraved elements”. The company’s president explains: “Liquid is a more efficient pressure source and delivers more consistent pressure than air pressure because liquid flows down and then out versus air which seeks the least resistance in the preform by finding minor temperature or resin quality variations, and in particularly hot spots, in the heated preform which changes dynamically as the preform is stretched into a container.” As a result, the wall thickness distribution of LiquiFormTM bottles is much more even than that of conventionally produced bottles. Also, the new process can be used to make even thinner walls. Ann O’Hara cited weight reduction of between 13 and 21% in their current trials, emphasizing: “The results so far are examples of what can be achieved, but they are not the limit or the end of the line. We are sure that further optimization is possible.” One of the key parameters tested was top load, which came out around 20% superior to a bottle formed using compressed air and filled an capped separately. Another advantage, according to Ann O’Hara, is the shorter process cycle time and the resulting cost advantage offered by the LiquiFormTM process. “Actual LiquiForm fill/form tac-time ranges from 0.15 to 0.4 s depending on container size and application, and now, the cycle time will be determined by the machine designs ability to make use of this improvement in speed.” And LiquiFormTM is also able to produce sharper bottle definition and engraved elements.