Closures are literally the backstop of preforms. With the perfect preform only as good as its closure, one knows that a closure has many responsibilities, from ease of opening to effective protection of the product within. Closures need to perform in partnership with the preform, both from an application and an environmental perspective. Even if a closure is consumer- and product-friendly, recent legislation on tethered closures highlight how crucial it is that designs are also in accordance with the circular economy.
The EU directive on Single Use Plastics in May 2019 highlighted design requirements to connect caps to bottles from 2024, with regulations extending from the Circular Plastics Alliance launched in December 2018 by the European Commission. This high-level, multi-stakeholder platform gathers the complete plastics value chain to ensure the responsible progression of plastic packaging throughout its entire lifecycle.