PETpla.net Insider 01+02 / 2010

BOTTLE MAKING 21 PET planet insider Vol. 11 No. 01+02/10 www.petpla.net Beer The beer bottle is the same as the CSD bottle in its construction, and so offers all of the same advantages. In addition an oxygen scavenger can be added to the inner layer and a UV blocker can be added to the outer foamed layer if required. For beer, an oxygen additive can be added to the oPTI bottle. Milk The oPTI bottle is ideal for milk and milk-based products. As a single- layer, fully foamed bottle, advantage can be taken of the full weight-saving potential. The foam can block 50% of the light so that for some applications a light-blocker such as titanium oxide can be dispensed with altogether. If more effective light blocking is required the amount of titanium oxide can neverthe- less be drastically reduced. This also means that a shrink sleeve is no longer needed for the purpose of blocking the light - fillers can now switch to cheaper “patch” labels. In the oPTI milk bottle the foam can block 50% of the light. Hot fill T he oPTI hot fill bottle does not have to be reheated. Thanks to the foam evidence exists that the bottle not only more effec- tively isolates a chilled beverage but also retains the heat of a hot-filled beverage within the inner layer of the bottle during the filling process so that the outer layer does not reach the critical temperatures at which it begins to shrink in an uncontrolled manner. This makes the oPTI the first hot fill PET bottle that does not have to be reheated or to be made from a special hot-fill grade. Shampoo Tactile quality: Easy-to-grip shampoo bottle. A shampoo bottle does not nor- mally go into the PET recycling stream so here too a fully foamed bottle is the most appropriate solution. The colours can be introduced at the preform stage. The big advantage for a shampoo bottle is its tactile quality. Even under the shower it is easy to grip and doesn’t slip through the fingers.