PETpla.net Insider 01+02 / 2016

CAPPING / CLOSURES 28 No. 01+02/16 www.petpla.net Please order your copy at the PETplanet insider book shop: https://www.petpla.net/books Bottles, Preforms and Closures - A Design Guide for PET Packaging Second Edition by Ottmar Brandau € 115,00 180 pages © Copyright Elsevier 2012 * This article was published in Bottles, Preforms and Closures, Ottmar Brandau, Chapter 4.3 Copyright Elsevier 2012 4.3.3 Sports closures Consumers on the go are the main targets for closures that need not be unthreaded to gain access to the product. Unthreading requires two hands, and in many activi- ties such as biking this can be cumbersome or even dangerous. The industry has addressed this need and invented a series of closures that offer improved ease of access. There are a variety of designs available, but the “push–pull” closure is most widely used (Fig. 4.16) . These closures feature a threaded base fitted with a tamper-evident band. A protruding cylinder is part of the base onto which a hollow cylinder is fitted in a secondary operation. The liquid flows through the ring- shaped area between these two parts when the outer part has been pulled open. The inner cylinder serves as guide for the outer part and forms a seal with it when the outer part has been pushed down. A dust cover, which could also feature a tamper- proof device, goes on top of the spout. The consumer can, after removing the dust cover, pull the spout up and gain access to the drink. Figure 4.16 The push–pull closure is the most widely used sports closure in the market. (Picture courtesy of Bericap).